5-Soft-S
Osprey Transporter Series Owner's Manual
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TRANSPORTER SERIESTRANSPORTER 130TRANSPORTER 95TRANSPORTER 65TRANSPORTER 40Welcome to Osprey. We pride ourselves on creating the most functional,durable and innovative carrying product for your adventures. Please refer tothis owner’s manual for information on product features, use, maintenance, customer service and warranty.OWNER'S MANUALSHARED FEATURES1 Dual-zippered 3D end pockets with overlapping rain flaps for quick access to smaller items2 Four burly webbing grab handles3 Eight web lashing points for securing duffel or attaching gear 4Large lockable U-zip access to main compartment5 Weather-protected main compartment zip path with overlapping rain flaps6 Stowaway contoured harness and yoke for comfortable backpack carry7 D-ring attachments for adding a shoulder strap +Internal zippered mesh side panel pocketFABRICMAIN 780D Packcloth Double Coated TPUACCENT 360/400D Two Tone Packcloth Double Coated TPUBOTTOM 780D Packcloth Double Coated TPU7241635TRANSPORTER 130 SPECSCubic Inches 7933Liters 130Pounds 4.06Kilograms 1.84 Inches 32h x 18w x 15d Centimeters 81h x 46w x 37dTRANSPORTER 95 SPECSCubic Inches 5797Liters 95Pounds 3.49Kilograms 1.59 Inches 27h x 15w x 13d Centimeters 69h x 37w x 34d1TRANSPORTER 65SPECS Cubic Inches 3967 L iters 365Pounds 3.10 Kilograms 1.41 Inches 24h x 14w x 13d Centimeters 60h x 36w x 32dTRANSPORTER 40SPECS Cubic Inches 2441L iters 40Pounds 2.67 Kilograms 1.21 Inches 21h x 12w x 11d Centimeters 53h x 31w x 27dUNIQUE FEATURES1 Shoulder strap includedUNIQUE FEATURES 1Shoulder strap included1CARRY1 STOWAWAY SPACERMESH HARNESS + Full yoke and contoured harness straps + Soft, breathable contact surface for comfort + Adjustable sternum strap with safety whistle + Adjustable load lifters transfer weight from harnessto hipbelt*Transporter 130 and 95 onlyPACK / RESERVOIR MAINTENANCEYour Osprey pack is an extremely durable product and is built for years of use. However, some basic pack maintenance will help ensure your pack lasts a lifetime.For complete instructions on cleaning your Osprey pack, visit:/PackTech/PackCare.OSPREY PACKSSTANDARD MAINTENANCE+ After each trip be sure to clean out your pack thoroughly.+ C lean the zippers regularly using mild soap, warm water and soft brush. This willhelp keep them in proper working condition.+ I f your pack is wet, hang it to dry out of direct sunlight.+ L oosen all the straps.+ W ash your pack if dirt, sweat, salt and stains have worked their way into fabrics,webbing or mesh.(Do not immerse travel packs in water with our HighRoad™ Wheeled Chassis.)WASHING YOUR PACKA E mpty the pack including any food, dirt or spilled contents.B I f your pack has a removable harness and hipbelt, remove them from the pack body.CD o NOT wash your pack in a washing machine. Clean your pack and componentsin a bathtub or large sink using a mild detergent and warm water.D A gitate the pack gently. Scrub the inside and outside of all compartmentsincluding the pockets with a soft brush.E C lean the zippers using a mild soap, warm water and a soft brush. Flush waterand soap through the buckles. Keeping dirt and debris out of the zippers and buckles will help keep them in proper working condition.F D rain the dirty water from the bathtub or sink and refill with cool clean non-soapy water. Rinse the pack thoroughly. Repeat this step as neccessary.G H ang your pack to dry outside or in a well ventilated area, out of direct sunlight.WHEELED TRAVEL LUGGAGE(Do not immerse travel packs in water with our HighRoad™ Wheeled Chassis.)A A fter each trip, e mpty the pack including any food, dirt or spilled contents.BC lean the zippers regularly using mild soap, warm water and soft brush. This willhelp keep them in proper working condition.C W ipe the exterior of the chassis with a damp cloth or sponge.D C lean the pack fabric by scrubbing stains and dirt with warm water, milddetergent and a soft brush or sponge.E U se a wet towel with clean non-soapy water to wipe away any soap residue onthe pack.F H ang your pack to dry outside or in a well ventilated area, out of direct sunlight.RECOMMENDED CLEANING PRODUCTSOsprey recommends Nikwax® products for pack care. Be sure to read label directions carefully before applying any product to your pack.Tech Wash® - Use this with warm water for washing and cleaning your packs or luggage.Tent & Gear Solar Proof® - Use this spray-on product to protect your packs from UV exposure and to improve water repellency.OSPREY RESERVOIRSRESERVOIR STANDARD MAINTENANCE+ R insing out your reservoir after each use should keep your reservoir fresh,especially when using sugary drink mixes.+ P eriodically use Osprey's Hydraulics™ Cleaning Tablets to clean your reservoir.+ I odine or other purifying tablets used in your reservoir will not affect the qualityof your reservoir. However these tablets may stain the reservoir over time.+ F reezing your reservoir will not effect the quality of the reservoir. However if thereservoir is filled with water, be aware that water expands when it freezes and can damage your reservoir if it is overfilled.+ D o NOT pour boiling water into the reservoir. This can damage the reservoir andwill void your warranty.+ W atch “Cleaning an Osprey Hydraulics™ Reservoir” video on Osprey PacksYouTube® page.CLEANING YOUR RESERVOIR (WITH OSPREY HYDRAULICS™ CLEANING TABLETS )A F ill reservoir with warm water. Do not use bleach or boiling water.B A dd one cleaning tablet to reservoir and close the cap.C L et tablet dissolve for 5 minutes with the reservoir laying on its back.D S hake the reservoir for 30 seconds to mix and spread the solution.E P inch the bite valve and squeeze the reservoir to remove air and fill thereservoir hose and bite valve with solution.F L et the reservoir sit for 15 minutes and then pour out solution.G R inse the reservoir and tube with clean cool water.H Hang your reservoir to dry in a well ventilated area.DEEP CLEANING YOUR RESERVOIR (WITH OSPREY HYDRAULICS™ CLEANING KIT )1 R inse out the reservoir and fill it with warm water and a mild dish detergent.Do not use bleach or boiling water.2 W ith the large cleaning brush from Osprey's Hydraulics™ Cleaning Kit scrub theinterior of the reservoir.3 R emove the hose from the reservoir and the bite valve from the hose and usethe small brush from Osprey's Hydraulics™ Cleaning Kit to scrub the interior of the hose.4 R emove the silicone bite valve cover and clean it and the bite valve with warmsoapy water.5 R inse the interior and exterior of the reservoir, hose and bite valve parts withcool clean water.6 L et the hose and bite valve dry in a well-ventilated area.7 I nsert Osprey's Hydraulics™ Cleaning Kit drying rack into the reservoir andhang to dry in a well ventilated area.For complete instructions on cleaning your Osprey reservoir watch,“Cleaning an Osprey Hydraulics™ Reservoir” at /ospreypacks.For more information on this product and others, pack care, how to pack your pack,our lifetime guarantee, or to contact Osprey Customer Service, visit .OWNER'S MANUAL。
28-soft-skills-(28种软技能)教学文案
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Soft Skills – Self Management Skills1.Self awareness– knowing what drives, angers, motivates, embarrasses, frustrates,inspires you2.Emotion management– being able to control unexpected emotions like anger andfrustration so you can think clearly and at your optimum.3.Self-confidence– those who believe in themselves have access to “unlimitedpower” (wisdom from KungFu Panda)4.Stress management –Being able to stay calm and balanced in stressful,overwhelming situations5.Resilience– Ability to bounce back from a misstep in your job or career6.Skills to forgive and forget- Ability to move on without baggage from a pastmistake or something in your career that wronged you7.Persistence and Perseverance– Ability to overcome challenging situations andobstacles and maintain the same energy8.Patience–ability to step back in an emergency to think clearly or the ability topause and wait when you are in a rush or want to rush others.Soft Skills – People Skillsmunication skills- skills to listen and articulate your ideas in writing andverbally to any audience in a way where you are heard and you achieve the goals you intended with that communication. This is also known as interpersonal communication skills2.Presentation skills–ability to maintain attention and achieve your desiredoutcome from presenting to an audience3.Facilitating skills- ability to coordinate and solicit well represented opinions andfeedback from a group with diverse perspectives to reach a common, best solution.4.5.Interviewing skills–ability to sell your skills as an interviewe e or accuratelyassess other’s ability or extract the needed information as an interviewer6.Selling skills –this is not just for people in sales. This is the ability to build buy-into an idea, a decision, an action, a product, or a service7.Meeting management skills–at least 50% of meetings today in corporateamerica are a waste of time. This is the skill to efficiently and effectively reachproductive results from leading a meeting8.9.Influence / persuasion skills- ability to influence perspective or decision makingbut still have the people you influence think they made up their own mind.10.Team work skills- ability to work effectively with anyone with different skill sets,personalities, work styles, or motivation level11.Management skills–ability to motivate and create a high performing team withpeople of varied skills, personalities, motivations, and work styles.12.13.Leadership skills–ability to create and communicate vision and ideas that inspiresothers to follow with commitment and dedication.14.15.Skills in dealing with difficult personalities– Ability to work well or managesomeone whom you find difficult16.Skills in dealing with difficult situations–Ability to stay calm and still beeffective when faced with an unexpected difficult situation.17.18.Ability to think / communicate on your feet (under pressure)–ability toarticulate thoughts in an organized manner even when you are not prepared for the question or situation you are in19.working skills– a bility to be interesting and interested in businessconversations that motivates people to want to be in your network.21.22.Interpersonal relationship skills –ability to build trust, find common ground,have empathy, and ultimately build good relationships with people you like or in positions of power/influence.23.24.Negotiation skills–ability to understand the other side and reach a win-winresolution that you find favorably, satisfies both sides, and maintains relationships for future dealings25.Mentoring / coaching skills–ability to provide constructive wisdom, guidance,and/or feedback that can help others further their career developmentanizing skills –ability to organize business gatherings to facilitate learning,networking, or business transactions27.28.Self-promotion skills - ability to subtly promote your skills and work results topeople of power or influence in your organization. This will build your reputation and influence.29.30.Savvy in handling office politics - office politics is a fact of life in corporateamerica. This is the ability to understand and deal with office politics so you can protect yourself from unfairness as well as further your career.。
产品说明-网络卫士防火墙NGFW4000系列型号参数
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网络卫士防火墙系统NGFW4000系列产品说明天融信TOPSEC®北京市海淀区上地东路1号华控大厦100085电话:+8610-82776666传真:+8610-82776677服务热线:+8610-8008105119http: //版权声明本手册的所有内容,其版权属于北京天融信公司(以下简称天融信)所有,未经天融信许可,任何人不得仿制、拷贝、转译或任意引用。
本手册没有任何形式的担保、立场倾向或其他暗示。
若因本手册或其所提到的任何信息引起的直接或间接的资料流失、利益损失,天融信及其员工恕不承担任何责任。
本手册所提到的产品规格及资讯仅供参考,有关内容可能会随时更新,天融信恕不承担另行通知之义务。
版权所有不得翻印© 1995-2009天融信公司商标声明本手册中所谈及的产品名称仅做识别之用,而这些名称可能属于其他公司的注册商标或是版权,其他提到的商标,均属各该商标注册人所有,恕不逐一列明。
TopSEC®天融信信息反馈目录1产品概述 (4)2关键技术 (4)1)灵活的接口扩展能力 (5)2)安全高效的TOS操作系统 (5)3)集成多种安全引擎:FIREWALL+IPSEC+SSL+ANTIVIRUS+IPS (5)4)完全内容检测CCI技术 (5)3产品特点介绍 (7)4产品功能 (12)5运行环境与标准 (17)6典型应用 (19)1)典型应用一:在企业、政府纵向网络中的应用 (19)2)典型应用二:防火墙作为负载均衡器 (20)3)典型应用三:防火墙接口备份 (21)4)典型应用四:AA模式双机热备 (22)7产品资质 (22)8特别声明 (23)1产品概述十几年来,天融信专注于信息安全,第一家开发出自主防火墙系统,第一家提出TOPSEC联动技术体系。
网络卫士防火墙历经了包过滤、应用代理、核检测等技术阶段,目前已进入以自主安全操作系统TOS(Topsec Operating System)为基础,以完全内容检测为标志的技术阶段,集成了防火墙、VPN、带宽管理、防病毒、入侵防御、内容过滤等多种安全功能。
(完整版)最新外研版英语八年级下册单词表带音标文本版
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外研版英语初二下册单词表第一课1. smell[smel]有…的气味;闻;气味(n.)2. soft [sɒft]软的;柔软的3. sour['saʊə(r)]酸的;馊的4. cookie ['kʊkɪ]小甜饼;曲奇饼5. Mm呣(表示味道好)6. pizza ['pi:tsə]比萨饼7. lovely['lʌvlɪ]令人愉快的;可爱的8. done [dʌn]做完的9. try [traɪ]尝试;努力10. have a try尝一尝;试试看11. pie [paɪ]馅饼;派12. sound [saʊnd]听起来;令人觉得13. Sweet tooth[swi:t tu:θ]对甜食的爱好14. salt[sɔ:lt]盐;食盐15. jam[dʒæm]果酱16. for [fə(r)]用于(表示持续时间)达17. favourite['feɪvərɪt]最喜欢的人或事18. ear [ɪə(r)]耳朵19. glasses['glɑ:sɪz]眼镜20. jeans [dʒi:nz]牛仔裤21. nervous ['nə:vəs]情绪不安的;紧张的22. Fair [feə(r)]金色的,浅褐色的23. pretty ['prɪtɪ]秀丽的;标致的24. proud [praʊd]感到自豪的;感到25. be proud of为…而感到骄傲26. stranger['streɪndʒə(r)]陌生人27. message ['mesɪdʒ]电子邮件;口信;信息28. sb. can’t wait某人等不及了29. hobby ['hɒbɪ]业余爱好30. at school[sku:l]上学;在学校31. in [ɪn]参加;加入;在…期间32. mark [mɑ:k]分数33. love [lʌv](用于信尾)爱你的第二课1. ever ['evə(r)]曾经;从来;在任何时候2. enter ['entə(r)](使)参加;(使)报名3. competition[ˌkɒmpəˈtɪʃn]比赛;竞争4. prize [praɪz]奖品;奖项5. first prize一等奖6. dream [dri:m]梦;梦想;做梦(v.);梦到7. afford [ə'fɔ:d] 买得起;付得起8. write about编写;写作9. make up编写;创作10. invite [ɪn'vaɪt] 邀请11. move [mu:v]搬家;改变…的位置12. send(sent)[send]派遣去;命令…去13. germany [ˈdʒɜ:məni:]德国14. france[frɑ:ns]法国15. tower ['taʊə(r)]塔16. ancient ['eɪnʃənt]古老的;古代的17. king [kɪŋ]国王;君王18. queen [kwi:n]女王;王后19. Arabic [ˈærəbɪk]阿拉伯语20. way [weɪ]方面21. mix [mɪks]相混合;融合22. miss [mɪs]惦念;怀念;想念23. count [kaʊnt]数;清点24. count down [daʊn]倒数;倒计时第三课1. earth [ɜ:θ]地球2. moon [muːn] 月亮;月球3. news [nju:z] 新闻;消息4. reach [ri:tʃ]到达;抵达5. planet['plænɪt]行星6. yet [jet]还,尚(表示某事尚未发生,但未来也许可能发生)7. just [dʒʌst]刚才;刚刚8. model ['mɒdl]模型9. spaceship [ˈspeɪsʃɪp]航天器;宇宙飞船10. project [prəˈdʒekt]计划;工程;项目11. no problem [ˈprɒbləm]没问题(表示乐于做某事)12. latest [ˈleɪtɪst]最近的;最新的13. on [ɒn]在(播放)中;关于…14. discover [dɪ'skʌvə(r)]发现;找到15. astronaut [ˈæstrənɔ:t]宇航员16. space travel [speɪs] [ˈtrævl]航天旅行17. none [nʌn]没有一个人18. environment [ɪn'vaɪrənmənt]环境19. that [ðæt]那;那个(前面已提及的事物)20. solar ['səʊlə(r)]太阳的;与太阳有关的21. system['sɪstəm]系统;体系22. solar system星系;(尢指)太阳系23. group[ɡru:p]群;组24. galaxy['ɡæləksɪ]星系25. universe [ˈju:nɪvɜ:s]宇宙26. Light [laɪt]光线;光亮27. impossible[ɪmˈpɒsəbl](事情)办不到的,不可能的28. out[aʊt]在远方29. Communicate [kə'mju:nɪkeɪt]联系;交流第四课1. cough [kɒf]咳嗽(n.);咳嗽(v.)2. fever['fi:və(r)]发烧;发热3. headache [ˈhedeɪk]头痛4. stomach ['stʌmək]腹部;肚子5. ache [eɪk]痛;疼痛6. stomach ache牙痛7. Ill [ɪl]不健康的;有病的8. this [ðɪs]这,这个(刚提到的人或物)9. since[sɪns]自…以来;从…以来10. cold[kəʊld]感冒;伤风11. catch a cold[kætʃ]感冒12. take [teɪk](用机器)测定,量取;有规律的吃、喝13. take sb. temperature[ˈtemprətʃə(r)]量某人的体温14. fast food[fu:d]快餐食品15. health [helθ]健康(状况)16. well [wel]健康的17. heart [hɑ:t]心脏18. active [ˈæktɪv]积极的;活跃的19. pet [pet]宠物;宠畜20. member [ˈmembə(r)]成员;会员21. take part in参加,参与(某事)22. condition[kənˈdɪʃn]状况;身体状况23. in excellent condition[ˈeksələnt]健康状况很好24. sleepy['sli:pɪ]想睡的;困的25. then[ðen]当时;那时26. daily ['deɪlɪ]每天的;天天的27. weak[wi:k]弱弱的;虚弱的28. illness[ˈɪlnɪs]病;疾病29. exercise ['eksəsaɪz]运动;锻炼30. awful [ˈɔ:fl]极讨厌的;极坏的31. feel awful感到不舒服32. all over浑身;到处33. perhaps [pəˈhæps]可能;也许第五课1. cartoon [kɑ:'tu:n]漫画;动画片2. handsome['hænsəm]漂亮的;英俊的3. smart [smɑ:t]机灵的;聪明的4. sky [skaɪ]天;天空5. fight [faɪt]与…战斗(n.);斗争6. cool [ku:l]时髦的;酷的7. hero ['hɪərəʊ]英雄;男主角8. Humorous[ˈhju:mərəs]幽默的;滑稽的9. can’t help doing sth.忍不住做某事10. laugh [lɑ:f]笑;发笑11. lesson ['lesn]经验;教训12. orange-and-white['ɒrɪndʒ]橙白相间的13. ugly ['ʌɡlɪ]难看的;丑陋的14. win the heart of sb.赢得某人的心15. schoolbag ['sku:lbæg]书包16. lead [li:d]领导;率领17. clever ['klevə(r)]聪明的;机灵的18. as [əz]当…时19. mess [mes]脏乱;凌乱20. heaven ['hevn]天国;天堂21. expect [ɪk'spekt]期盼;等待22. artist [ˈɑ:tɪst]艺术家;画家23. invent [ɪn'vent]发明;创造24. copy['kɒpɪ](一)本;(一)份25. black-and-white黑白的26. own [əʊn]自己的27. private ['praɪvət]私人的;个人的28. create [krɪ'eɪt]创造29. satisfy[ˈsætɪsfaɪ]满足;使满意第六课1. fan[fæn]扇子2. stamp [stæmp]邮票3. tidy['taɪdɪ]整理、收拾;整洁的(n.)4. tidy up使整齐;使整洁5. shelf [ʃelf]隔板6. have a look看一看7. as [əz]作为;当8. coin [kɔɪn]硬币9. note [nəʊt]纸币10. pound [paʊnd]英镑11. dollar ['dɒlə(r)](美、加拿大、澳等国)元12. must [məst]一定,肯定13. valuable [ˈvæljuəbl]值钱的;有价值的14. with [wɪð]用…15. value['vælju:]价值;有用性16. just [dʒʌst]只是;仅仅17. person ['pɜ:sn]人(通常指成年人)18. interest ['ɪntrəst]兴趣;爱好19. skill [skɪl]技能;技艺20. activity[æk'tɪvətɪ]活动21. sailing [ˈseɪlɪŋ]航海;航行22. come out问世23. result [rɪ'zʌlt]结果;后果24. as a result结果;因此25. pleasure ['pleʒə(r)]愉悦;快乐26. success [sək'ses]成功;成就第七课1. list[lɪst]名单;清单2. make a list列清单3. crazy ['kreɪzɪ]发疯的;荒唐的4. at the end of在…的结尾(或末端)5. shorts [ʃɔ:ts]【用复数】短裤6. trouers [ˈtraʊzəz]【用复数】裤子7. sunglasses [ˈsʌnglɑ:sɪz]太阳镜;墨镜8. homestay ['həʊmsteɪ]家庭寄宿9. weigh [weɪ]重量有…;重…10. total ['təʊtl]总的;全部的11. weight [weɪt]重量12. passport ['pɑ:spɔ:t]护照13. culture ['kʌltʃə(r)]文化14. at the same time同时15. last [lɑ:st]持续;延续11. depend [dɪ'pend]视…而定;决定(干)12. depend on取决于;决定于13. provide [prə'vaɪd]提供;供应14. test [test]测验;考试;测验(v.)15. progress ['prəʊɡres]进步;进展;推进(v.)16. guest [ɡest]客人;宾客17. daily life ['deɪlɪ]日常生活18. form [fɔ:m]形成;表格(n.)19. friendship ['frendʃɪp]友谊;友好20. stay in touch with sb.(与某人)保持联系21. prefer [prɪ'fɜ:(r)]更喜爱;钟爱22. certain [ˈsə:tn]确定的;无疑的23. fill [fɪl]填满;填充24. fill out填写;填充第八课1. hardly [ˈhɑ:dli]几乎不;几乎没有2. take up占去(时间或空间)3. point out [pɔɪnt]指出;指明4. sights[saɪts]【用复数】风景;名胜5. thirsty ['θɜ:stɪ]渴的6. at the top of在…的顶端7. waste [weɪst]浪费;滥用;浪费(n.)8. square [skweə(r)](表示面积单位)平方的9. kilometre [ˈkɪləmi:tə(r)]千米;公里10. shape [ʃeɪp]外形;形状11. human ['hju:mən]人12. wake [weɪk]唤醒;醒来13. wake sb. up唤醒某人14. somebody ['sʌmbədɪ]某人;有人15. about [ə'baʊt]向四周;几各处16. path [pɑ:θ]小路17. pull [pʊl]拉;牵;扯18. freshwater ['freʃwɔ:tə(r)]淡水的第九课1. helpline [ˈhelplaɪn]服务热线2. separate ['seprət]使分开;分隔;分开的(adj.);单独的3. explain [ɪk'spleɪn]解释;说明4. mention ['menʃn]提及;谈到5. refuse [rɪ'fju:z]拒绝6. treat [tri:t]对待;看待7. herself [hɜ:ˈself]她自己8. whether [ˈweðə(r)]是否9. lonely ['ləʊnlɪ]孤独的;寂寞的10. regret [rɪ'ɡret]懊悔;遗憾11. patient ['peɪʃnt]有耐心的;能忍耐的12. introduce [ˌɪntrəˈdju:s]介绍;引见13. encourage [ɪn'kʌrɪdʒ]鼓励;激励14. join in [dʒɔɪn]参加;加入15. no problem没什么;没关系16. silence ['saɪləns]寂静;无声17. in silence安静地;沉默地18. pass [pɑ:s]经过;通过19. bright [braɪt]欢快的;明亮的20. treasure ['treʒə(r)]珍宝;珍贵之物21. day by day一天天地;渐渐地22. trust [trʌst]信任;依赖;信任(n.)23. include [ɪnˈklu:d]包括;把…列为一部分24. circle ['sɜ:kl](由相关的人形成的)圈子25. stick [stɪk]粘;粘贴26. glue [ɡlu:]胶水27. suggestion[səˈdʒestʃən]提议;建议第十课1. director [də'rektə(r)]导演;主管;经理2. show [ʃəʊ]引领;带领3. around [ə'raʊnd]到处;向各处4. show sb. around带某人参观;给某人做向导5. on air(广播或电视)播出6. avoid [ə'vɔɪd]避免;防止7. background [ˈbækgraʊnd]背景;后景8. national['næʃnəl]国家的;国内的9. International[ˌɪntə'næʃnəl]国际的;世界的10. presenter [prɪˈzentə(r)]主持人11. interview['ɪntəvju:]采访;访谈;采访(v.)12. seem [si:m]看来;似乎13. listener [ˈlɪsənə(r)]听众;听者14. in person亲自;本人15. part-time兼职的16. article ['ɑ:tɪkl]文章;报道17. studio ['stju:dɪəʊ]录音室;录制室18. purpose['pɜ:pəs]意图;目的。
最新译林牛津英语五年级上册注音标单词表
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bear[beə]熊fores t[’fɒrɪst]森林there [ðɛə](与be连用)有house[haʊs]房子soup[su:p]汤just right[dʒʌst][raɪt]正合适,正好room[ru:m]房间hard[hɑ:d]硬的soft[sɒft]柔软的afraid[əˈfreɪd]害怕的in front of [frʌnt] f在……前面her[hə:]她Help![help]救命啊!beside[bɪˈsaɪd]在……旁边between[bɪˈtwi:n]在……中间really[ˈri:əli]真的then[ðen]然后find[faɪnd]找到,发现their [ðeə]他们的;她们的;它们的student[ˈstju:dnt]学生show .。
. around[ʃəʊ][ə'raʊnd] 带……参观classroom[ˈklɑ:sru:m]教室second[’sekənd]第二floor[flɔ:(r)]楼层computer[kəmˈpju:tə(r) ]电脑third[θɜ:d]第三first[fɜ:st]第一;首先swing[swɪŋ]秋千push[pʊʃ]推heavy[’hevɪ]重的,沉的stop[stɒp]停下,停止high[haɪ]高的great[ɡreɪt]很多的,极大的one 。
,the other 。
..一个……,另一个……body[’bɒdɪ]身体no[nəʊ]没有,无leg[leɡ]腿or[ɔ:(r)也不,也没有arm[ɑ:m]手臂wing[wɪŋ]翅膀foot[fʊt]脚,足rabbit['ræbɪt]兔子give[ɡɪv]给finger['fɪŋɡə(r)]手指hobby[’hɒbɪ]业余爱好be good at擅长于with与……一起also['ɔ:lsəʊ]也read[ri:d]读,阅读story[’stɔ:rɪ]故事a lot of很多play the piano['pjɑ:nəʊ]弹钢琴dance[dɑ:ns]跳舞watch films [wɒtʃ] [fɪlm]看电影both[bəuθ]两个都sing[sɪŋ]唱歌group[ɡru:p]组about[ə’baʊt]关于idea[aɪ'dɪə]主意ice[aɪs]冰hole[həʊl]洞Look out!当心!注意!wet[wet]湿的,潮的teacher['ti:tʃə(r)]老师teach[ti:tʃ]教writer[ˈraɪtə(r)]作家write[raɪt]写work[wɜ:k]工作at home在家doctor['dɒktə(r) ]医生help[help]帮助sick[sɪk]生病的people['pi:pl]人;人们factory[’fæktrɪ]工厂worker[’wɜ:kə(r)]工人cook[kʊk]厨师driver[’draɪvə(r)]驾驶员,司机farmer[’fɑ:mə(r)]农民nurse[nɜ:s]护士policeman[pəˈli:smən]警察Word lists Unit 6第六单元单词表e—friend[frend]网友Wait a minute.[’mɪnɪt]等一会儿。
雷赛BASIC编程手册v2.1
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3.2.7 STOP ...............................................................................................................18
3.2.8 AUTO..............................................................................................................18
3.3.1 运算符.............................................................................................................19
3.3.2 ABS.................................................................................................................22
3.2.3 SUB.................................................................................................................17
3.2.4 ON GOSUB ....................................................................................................18
雷赛运动控制器 BASIC 语言编程手册
Version 2.1
斑马技术公司DS8108数字扫描仪产品参考指南说明书
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soft drink 不含酒精的饮料
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From VOA Learning English, this is the Health Report.A new study has found evidence of aggressive behavior in children who drink four or more servings of soft drinks every day. Information for the study came from the mothers of 3,000 5-year-olds.Researchers asked the women to keep a record of how many servings of soft drinks their children drank over a two-month period. The women were also asked to complete a checklist of their children's behavior.The researchers found that 43 percent of the boys and girls drank at least one daily serving of soda, 4 percent of the youngsters had four or more sodas to drink every day.Shakira Suglia is with Columbia University's Mailman School of Public Health in New York City. She worked on the study with researchers from the University of Vermont and Harvard University School of Public Health. She says they found that children who drank the most soda were more than two times as likely as those who drank no soda to show signs of aggression."For the children who consumed four or more soft drinks per day, we see an association between aggressive behaviors, attention problems and withdrawn behaviors."The aggressive behaviors included destroying possessions belonging to others, taking part in fights and physically attacking people.Shakira Suglia says the researchers identified the link after they considered socio-demographic factors like the child's age and sex. They also considered other possible influence, such as whether the boys and girls were eating sweets or giving fruit drinks on a normal day. In addition, the researchers examined parenting styles and other social conditions that might be taking place in the home.Doctor Suglia says it's not clear why young children who drink a lot of soda have behavior problems."We can't prove that this is a direct cause and effect relationship, having said that, there are a lot of ingredients in soda, a lot of ingredients that have not been examined in relation to behavior."A substance often found in soft drinks is caffeine, which helps to make people feel energized.Doctor Suglia suggests that caffeine could be causing the 5-year-olds to be more aggressive. The research is part of a large study called the Fragile Families and Child Wellbeing Study, it follows 5,000 poor mothers and their children in 20 American cities.Earlier studies of young adults have found the highest sugar levels in those who carry weapons and show signs of negative social behaviors.And that's the Health Report from VOA Learning English.。
英语五年级上第1-4单元总结
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5A Unit1 Goldilocks and three bears 一、单词:1. forest 森林2. house 房子3. soup 汤4. hard 硬的5. soft 软的6. afraid 害怕7. help 救命8. bear 熊9. really 真的10. beside 在…旁边11. find 找到12. between 在…之间13. their 他们的14. then 然后二、词组:1. in the forest 在森林里2. a beautiful house 一个漂亮的房子3. in the house 在房子里4. hungry and thirsty 又饿又渴5. some soup 一些汤6. on the table 在桌子上7. too cold 太冷8. too hot 太热9. just right 正好10. three beds 三张床11. too hard 太硬12. too soft 太软13. three bears 三只熊14. in front of her 在她前面15. in the room 在房间里16. on the chair 在椅子上17. a glass of milk 一杯牛奶18. have a cold 感冒19.put on 穿上20.have some cakes 吃些蛋糕/有一些蛋糕21.in the fridge 在冰箱里22.in the kitchen 在厨房里23.find their cousin 找到他们的表弟24. in the living room 在客厅25. in the glass 在玻璃杯里26. in the tree 在树上。
三、句型:1. There’s a house in the forest.在森林里有一座房子。
5. This soup is just right. 这汤刚刚好。
人教版英语八年级下册词汇精讲--U10
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Unit10 I’ve had this bike for three years.1. yard v. 院子e.g. My husband would like to buy a house with a yard.我丈夫想要买一个带院子的房子。
back yard 后院schoolyard 校园yard sale 庭院拍卖会e.g. Finally, we chose to hold a yard sale to sell the things that we didn't need anymore. 最终,我们选择举办一次庭院拍卖会来出售我们不再需要的物品。
2. sweetadj. 甜蜜的;甜的;含糖的e.g. e.g. I like to eat something sweet.我想吃一些甜的东西。
sweet dream 美梦sweet taste 甜味adj.悦耳的;好听的e.g. The singer has a sweet voice.这名歌手有着甜美的嗓音。
n. 糖果(可数名词)e.g. My younger sister really likes sweets.我妹妹真的很喜欢糖果。
3. memory n.记忆;回忆;记忆力(pl. memories)e.g. The photos remind us of our memories.这些照片使我们想起了我们的回忆。
Mrs. Smith has a good memory though she has been 87 years old.斯密斯夫人有一个好的记忆力尽管她已经87岁了。
in memory of sb. 为了纪念(已故的)……bring back memories 使人回想起过往的时光memorize v. 记忆;记住e.g. The boy knows how to memorize his parents’ phone numbers.这个男孩知道如何记住他父母的电话号码。
Join In外研版五年级英语上册课件unit1-unit6(全册)
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(表演Picture8-Picture11的内容,注意体会人物的思想感 情)
Part3
12
13
14
want: 想要 sell :卖
15
16
give :给 All right.=OK. 好的
1.Who gets the necklace?
The old man.
2.Then what does he do?
外研版五年级英语上册 (JoinIn)课件【全册】目录
0002页 封面/前言/目录 0004页 Unit 1 My family 0018页 Unit 3 Time 0041页 Unit 4 What do you collect? 0109页 Unit 6 Dreams 0167页 补充活动 0215页 单词表
He sells the necklace and gets a hundred dollars.
听音朗读,体会人物的思想感情。
What's the difference? Which one is stupid?
Mascots can't always bring us good luck !
Who gets the necklace at last?
The old man
Then what does he do ?
He sells the necklace and gets a hundred dollars
Part 6 The golden necklace
Lead in----导入
• Have you got a mascot, Lily? • Yes, I have. • What is it? • A …. Here it is. • Oh, it’s beautiful. • Yeah, I like it very much.
DC2025A 16-Channel 16-Bit 12-Bit ±10V VOUT SoftSpa
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DESCRIPTION16-Channel 16-Bit/12-Bit ±10V V OUT SoftSpan DACs with 10ppm/°C Max ReferenceDemonstration circuit 2025A features the LTC®2668, 16-channel 16-Bit/12-Bit ±10V V OUT SoftSpan™ DACs with 10ppm/°C max reference in a 6mm × 6mm QFN package. This device features per-channel SoftSpan configuration with five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V,and ±10V. A toggle feature allows any or all DACs to switch between two programmed codes via a single SPI command or by the TGP input pin. The versatile SPI interface can operate on any logic level between 1.71V and 5.5V, for easy interface to lower voltage microcontrollers or FPGAs.L, L T, L TC, L TM, Linear Technology and the Linear logo are registered trademarks and SoftSpan and QuikEval are trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.DC2025A-A is populated with the 16-bit version of the LTC2668. DC2025A-B is populated with the 12-bit version for lower resolution applications.Design files for this circuit board are available at /demo/DC2025AFigure 1. Connection Diagram SIGNAL GROUNDSIGNALGROUNDOUTPUTSOUTPUT PULLED TO OVP W/5kΩ1dc2025afaQUICK START PROCEDUREDownload and install QuikEval™ from:/designtools/software/#Data Connect a DC590 controller or DC2026 Linduino withDC590 emulator firmware to the DC2025A with the supplied ribbon cable. Connect low-noise analog power supplies as shown in Figure 1. A ±15V supply will allow all of the SoftSpan ranges to be used, refer to the LTC2668 data sheet for other supply options if not all SoftSpan ranges are used.Connect the controller to the host PC’s USB port and run QuikEval. The DC2025A software will be downloaded and installed, after which a jumper setting window will appear as shown in Figure 2. The default settings are internal reference, SoftSpan operation with 0V to 5V range, 0V output on power-up. If the jumpers on the board have been changed to a different configuration, select the appropri-ate options in the pull-down menus to match the board. Click OK and the main dialog will appear. The control panel gives access to all of the LTC2668’s functionality includ-ing per-channel SoftSpan ranges, toggling, Power-Down, etc. Detailed instructions are provided in the Help menu.Figure 2. Jumper Settings Dialog2dc2025afaQUICK START PROCEDUREFigure 3. Main Control Panel3dc2025afaQUICK START PROCEDUREExternal ConnectionsJ1: Interface connector to DC590 controller or Linduino. Provides OVP power, SPI interface, and board identifica-tion.V–, GND, V+: Analog supplies, connected to the LTC2668 V+ and V– pins. Nominally ±15V for operation in all Soft-Span ranges. Refer to the data sheet for other supply configurations.GND: Four additional ground posts and exposed ground plane around board edge allow solid connection to pro-totype circuitry and measurement equipment.AVP: Analog supply voltage. Normally supplied by an on-board LT1761-5 fixed 5V regulator that is powered from the V+supply. For single 5V supply applications, AVP may be tied directly to V+ and supplied with 4.5V to 5.5V. OVP: Digital interface power. No connection to this pin is required when used with a DC590 or Linduino controller. If another controller is used, connect to digital supply that powers the SPI bus controller (1.71 to 5.5V).REF:Connection to the REF pin. In internal reference mode, the reference voltage may be monitored at this point. Placing REF_SEL jumper in the EXT position allows an external reference to be connected to this point.MUX:Monitor Mux output. Allows surveying the DAC outputs under software control. Must be measured witha high impedance meter (output impedance is nominally2.1kΩ).VOUT0 to VOUT15: DAC outputs.CLR: Asynchronous clear input (pulled high to OVP with a 4.99k resistor). Pull to ground to reset the DAC to the power-on reset value (determined by MSPx pins.) TGP: Toggle input (pulled high to OVP with a 4.99k resis-tor). A high level on this pin enables software toggling. See data sheet for a complete description of toggle operation. LDAC: Asynchronous DAC update. If CS/LD is high at the falling edge of LDAC, DAC outputs will be updated with the contents of the input registers. If CS/LD is low when LDAC goes low, the DAC registers are updated after CS/ LD returns high.OVRTMP: Overtemperature pin (pulled high to OVP with a 4.99k resistor). The LTC2668 pulls this pin low if the die temperature exceeds approximately 160°C. It is released on the next rising edge of CS/LD.4dc2025afa5dc2025afaInformation furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.QUICK START PROCEDURETable 1MSP2MSP1MSP0OUTPUT RANGERESET CODE MANUAL SPANSoftSpan000±10V Mid-Scale X 001±5V Mid-Scale X 010±2.5V Mid-Scale X 0110V to 10V Zero-Scale X 1000V to 10V Mid-Scale X 1010V to 5V Zero-Scale X 1100V to 5V Mid-Scale X1110V to 5VZero-ScaleX JumpersREF_SEL (JP1): Selects internal or external reference mode. (See data sheet description of REFCOMP pin.)MSP0, MSP1, MSP2 (JP2, JP3, JP4): Manual Span control. Setting all jumpers to the 1 position (Default) selects SoftSpan operation, with a power-up default span of 0V to 5V, and reset to Zero-Scale. Other options are listed in Table 1.LEDsOVRTMP: Lights when OVRTMP pin asserts, indicating an overtemperature state. (Note that LED will light if positive analog supply is present and OVP is not. OVP is normally supplied by the controller.)Test PointsThe SPI bus is available on a row of through-hole test points next to J1 that may be used to monitor the bus or to drive the bus with an external controller.EEGND, WP: For factory use only.DEMONSTRATION BOARD IMPORTANT NOTICELinear Technology Corporation (L TC) provides the enclosed product(s) under the following AS IS conditions:This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONL Y and is not provided by L TC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases L TC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).No License is granted under any patent right or other intellectual property whatsoever. L TC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.L TC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a L TC applica-tion engineer.Mailing Address:Linear Technology1630 McCarthy Blvd.Milpitas, CA 95035Copyright © 2004, Linear Technology Corporation。
Torque and Drag Modeling; Soft-string versus Stiff-string Models
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Torque and Drag Modeling;Soft-string versus Stiff-string ModelsS.A.Mirhaj,University of Stavanger;E.Kaarstad,Baker Hughes;B.S.Aadnoy,University of StavangerAbstractThe wellbore friction,torque and drag,between drill string and the wellbore wall is one of the most critical issues which limits the drilling industry to go beyond a certain measured depth.For this reason many studies on torque&drag modeling have been performed.In this regard different approaches have been used;the difference in these approaches is often on how to include bending stiffness and shearing forces in the T&D calculations.These approaches are(1)the effect of shear forces calculations with the assumption of continuous contact of the wellbore wall and the drillstring as well as constant curvature trajectory,(2)the effect of bending stiffness and shearing forces calculations with assuming of clearance between drillstring and wellbore-wall and(3)the effect of bending moment and shearing forces,assuming continuous contact of the pipe and wellbore-wall and using a non-constant curvature trajectory in which the first and second derivatives of the curve exist (i.e.spline type trajectories).This paper consists of two main parts:first a review on literatures on the subject of stiff-string T&D will be considered.Secondly,an approach will be discussed in which despite of the assumption of constant curvature trajectory and full-contact of pipe and wellbore wall,the effect of bending stiffness on torque and drag calculations are considered.The simple and robust stiff-string model is implemented in two example wells in order to find out the importance of the stiff-string calculations.IntroductionExcessive torque and drag is a major challenge in drilling and completion of extended-reach and horizontal wells with3D geometry.Torque and drag modeling is regarded as an invaluable process to assist in well planning and to predict and prevent drilling problems.Some wells can be drilled,but may not be completed due to high friction.Most of today’s torque/drag models are based on the work of Johancsik et.al.(1984)and Sheppard et. al.(1987),while a more comprehensive model is derived by H-S Ho(1986)and then put in more understandable form by Mitchell and Samuel(2007).The basic fundamental equations to write the equilibrium equations for elastic pipe in reciprocal and rotational motions of drillstring were introduced by R.P.Nordgren(1974).Copyright2016,IADCMiddleEastDrillingTechnologyConferenceandExhibition2To satisfy equilibrium equation of the drillsring,the bending moment and shear forces have to be taken into account.In3-D space,the force balance in three dimensions;axial(tangential),radial(normal)and mutually perpendicular(binormal)coordinates will be considered.The coordinate system is not fixed and is moving along the drillstring in the wellbore.This will ease the resolving forces in direction of coordinats.Some researchers(H.S.Ho(1986),Mitchell(2007),McSpadden)proposed the curvilinear coordinate system since the wellbore has a curved profile but working with this coordinates system has its own mathematical complexities.In some cases,the bending stiffness and shear forces might be of a higher significance which will be investigated in this study.Because stiff-string models are more complicated than soft-string models,the application of soft-string models is preferred unless the use of such models introduces considerable errors in the calculations.The aim of this paper is to determine under what circumstances(i.e.drillstring OD&ID,curvature...)the use of stiff-string model is needed.Literature review on previous workStandard soft-string modelIn these models the drillstring is assumed to act like a cable/chain and the shearing forces and bending moments are considered to have negligible contribution to the normal forces and thus friction.This is a good assumption in many cases.Soft-string torque and drag modeling was initially developed with Johancsik et al.(1984)and later put in a standard differential form by Sheppard et al.(1987).Because of the simplicity and the fact of being user friendly,it has been extensively used in the field and industry applications.Feiber et al.(1999)developed a computer model for on-line torque and drag analysis in which he assessed the borehole conditions based on calculating of the friction factors incrementally bottoms-up. Aarrestad(1994)discussed application of catenary well profile in a well in North Sea that has been introduced by Sheppard(1987)and later changed to modified catenary profile by Alfsen(1993)and Aadnoy(2006).It is a cosine hyperbolic function well profile and the drillstring is hanging from two fixed points.Mason et al.(2007)pointed out different minor effects that have to be considered in the soft-string models in order to have a more realistic model.These effects are hydrodynamic viscous drag,tortuosity as well as buckling effect on frictional forces.A new analytic fully3-dimensional torque and drag model was published by Aadnoy,Fazaeli and Hareland(2009)which incorporates many more features.It introduces on single term,dog-leg severity,for both build/drop and side bend sections.Stiff-string modelingAmongst all studies,some of the authors who studied stiffness effect and their methodologies have been summarized in Table1.Shear forces In 3-D coordinate system the shear forces act in normal and binormal direction which are perpendicular to the axial (tangent)direction.This direction is considered to be along the wellbore trajectory.In solid mechanics the shearing forces are transverse forces and the deflection of a beam due to these forces,in most cases,is being neglected.The deflection,in other words,is the amount of bent that is being created in the beam by these forces which is directly related to contact force between the drillstring and wellbore wall.The effect of shear forces on deflection of a curved element in order to determine the deflection of the beam has been discussed by D.N.Rocheleau (1992),Dareing (1991)and T.Huang (1966).The fact is that none of the cases the boundary conditions of the final equation has been proposed and instead the general solution with constant coefficients has been derived which seems not to be helpful for industrial applications!Later in this study 2-D force balance with considering shear forces Table 1—Different approaches on Stiff-String T&DModeling 34have been analyzed and the result has been implemented into a field-case wellbore.A.McSpadden(2002) compared between soft string and stiff string model for coiled tubing applications.Some of the cleanest presentation of drillstring model formulation is by Nordgren(1974)and Walker and Friedman(1977)ѠA comprehensive paper on formulation is the work of H-S Ho(1986).Ho followed this paper with a simplification forЉsoft stringЉmodels(1988).He used the curvilinear coordinate system based on the Serret-Frenet equations for a curve in space(Zwillinger1996).Bending stiffness Neglecting the bending moment causes the contact force to be lower than it is in reality.In other words,the bending moment will force the pipe harder into the wellbore-wall and this will affect the normal force(contact force)between the pipe and the wall.The bending stiffness term is EI as far as Euler’s bending theory is assumed,in which E is the modulus of elasticity and I is the moment of inertia.Our interest is to find out under what circumstances these forces are of higher significance such that could not be neglected.The most recent work on this was done by Mitchell(2007).The fact about all previous works is that they do not implement the model into real field data in order to identify the significance of the bending stiffness as well as validity of the assumptions they have made.Amongst all,A.McSpadden(2002) performed a field case comparison.However his work is for coiled-tubing operations and the end conditions are different between coiled tubing and drilling operations.In addition the coiled tubing can handle DLS as high as1800°/100ft and radius of curvature of2-5ft which is far beyond what is normally encountered in daily oil field operations.McSpadden(2002)concluded that soft-string models are working perfect for most cases unless for DLS higher than30°/100ft and for stiffer tubular such as drill-collars as well as for very small radial clearance(i.e.casing,BHA).He also concluded that soft string models work perfect for most downhole conditions,unless the diameter of the pipe approaches the diameter of the wellbore.When the radial clearance becomes small or pipe is stiffer a stiff-string model is required.H-S Ho(1986,1988)and L.Zifeng(1993)have developed stiff-string model with the assumption that the drillstring is in continuous contact with the wellbore-wall.They have also concluded that effect of stiffness is quite important for the drill-collars and HWDP.Ho has concluded that soft-string models work with reasonably good estimation of torque and drag in following cases:(1)the drillstring continuously contacts the borehole i.e.this means that the wellbore trajectory is very smooth.(2)the borehole trajectory between survey stations is smooth and has zero tortuosity.In such situations the soft-string model provides very good results within such survey interval.To take the borehole-drillstring clearance into account and hence to allow the drillstring shape to be different than the wellbore curvature,the stiff-string model needs to use finite element analysis.In this regard,some authors have proposed a contact algorithm(S.Menand2006).This algorithm calculates the unknown contact points between the drillstring and the wellbore.In one case,for example,contact-points between the wellbore and the drillstring is modeled by generating a non-linear spring at each node that generates a reactive force proportional to the excess amount of transverse displacement over the annular spacing.S.Menand et.al.(2006)has explained about software,ABIS,which takes the radial clearance in to account for torque-drag calculations.He believes that with the assumption that the drillstring and wellbore do not have the same shape,radial spacing of wellbore-drillstring should then be included.This seems to be more realistic since the wellbore wall is not perfectly smooth and there are tortuosities and local DLS in the well path.With all the concerns above it’s not possible to exactly simulate the well path since it is randomly tortuoused and many factors are influencing on how tortuous the well path could be.Some authors like I.R.Rezmer Cooper et.al.(1999)and S.Menand et.al.(2006)believe that in order to take the natural frequency of an actual well into account,an arbitrary mathematical function(i.e.random functions)5 between the survey stations can be applied in order to correct the well path by addition of random variations of inclination and azimuth over a given length.General School of thoughts in Stiff-string T&D ModelingMost of the research on taking the effect of stiffness into account for drillstring is for the pipe in-compression.The pipe will be imposed into compression because of more WOB during drilling or extra frictional drag during RIH.These studies also include the coiled-tubing operations in which the risk of buckling is higher.In this regard the pipe deflection in the wellbore is being calculated since there is clearance between the pipe and the wellbore-wall.As a result the pipe and wellbore will not take the same shapes.The calculation of pipe deflection inside the wellbore has been started by Lubinski(1962).The Euler beam theory as opposed to Timoshenko beam theory was used by him and later extended for the pipe in compression by(Paslay&Cernocky,1991)first by Paslay and Dawson(1968).Analysis of this type takes care of bending moment and string stiffness indeed.Paslay(1964),Chandra(1986),Dareing(1991),Rocheleau(1992),Mitchell(buckling)(1992),Walker &Friedman(1977),G.Handelman(1946),Christman(1976),Li Zifeng(1994)and J.Wu&H. Juvkam-Wold(1993)have used the above-mentioned methodology in order to obtain the deflection of the pipe in the wellbore and from that to analyze the severity of string buckling.When the pipe will be imposed into compression,it deflects and most of authors tried to find out the contact points of the drillstring and the wellbore.In other words the assumption of continuous contact of the wellbore and the pipe is not valid anymore.However when it comes to pipe in-tension,the part of the pipe which is in tension tends to straighten out from a curved position and as a result the contact points also will change and are not the same as the pipe in-compression case.The works in which authors have taken the effect of bending stiffness and shearing forces into account for both pipe in-tension and in-compression in torque and drag modeling are not as many as they are for compression(buckling)situation.H.S.Ho(1986,1988),Paslay and Cernocky(1991),Cernocky and Scholibo(1994,1995),McSpadden(2011)and Later Mitchell(2007)are those who have analyzed both situations.The two general approaches for stiff-string calculations that are followed are:First the deflection in the pipe is due to axial forces that mostly occur for a pipe in-compression.In this situation aЉstand-offЉbetween the wellbore-wall and the drillstring is supposed.Second the deflection of the pipe is due to well-path trajectory which mostly occurs for the pipe when it is in-tension.In this case the pipe will be considered to be in full-contact with the wellbore wall.This could be explained by distribution of the side-force(normal force)for the case of full contact and point contact(contact in connectors/tool joints)that almost create the same amount of friction.As far as stiff-string assumption is made,the full-contact assumption could be applied if a non-minimum-curvature well-path trajectory used(i.e.spline type trajectories,helix)(Mitchell,2008).This is due to non-zero bending moment and shear forces for these types of trajectories.we model a stiff-pipe that is in full contact with the wellbore wall.(i.e.the wellbore shape is the drillstring shape.)The general belief in the industry for torque and drag modeling is that for majority of the cases soft-string model works well and in other rare cases a combination of soft and stiff-string model can be used.The combination of the two models means that soft-string model could be used for most part of the wellbore except high-tortuous and stiffer pipes in the wellbore like BHA that stiff-string models should be applied.Finally the new and simple approach for stiff calculations has been introduced.In this robust model, despite of assuming constant-curvature trajectory and continuous contact between wellbore-wall and pipe, the effect of bending stiffness has been fulfilled.In other words the problem of vanished bending moment while using the constant-curvature trajectory has been resolved.6New Approach;3D Analytical Stiff String Model for Torque and Drag AnalysisBased on work done by H.S.Ho(1986),A.McSpadden(2002)and Mitchell(2007,2008)for the wellbores with the constant curvature the bending stiffness doesn’t contribute to the normal force in the curved section.The general idea is that in order to include the effect of stiffness,a non-constant curvature trajectory(i.e.spline)in which the first and second derivative of the well-path exist(non-zero first and second order derivative)has to be applied.The assumption of non-constant curvature trajectory(i.e.spline)in which the first and second derivative of the well-path exist(non-zero first and second order derivative)will require complicated advanced trajectory calculations.Moreover the assumption ofЉstand-offЉbetween the pipe and the wellbore and calculating deflection equation of the pipe in the wellbore and from that obtaining the bending moment and shearing forces by calculating the second and third derivative of the deflection also result-in sophisticated differential equations with unknown boundary conditions that are difficult to determine.Here the aim of this new approach is to derive a simple model that can calculate the effect of pipe stiffness despite of having constant trajectory well-path trajectory as well as continuous contact of the wellbore-wall and pipe(zero stand-off).In this model the following assumptions have been made:●It is independent of the curvature●The force required to shape the pipe along the wellbore will be added as NORMAL force.Thisadditional normal force is resulted from the bending moment that is imposed in a bend.From the additional normal force,additional friction force based on coulomb friction model will be calculated.●Since the model is for a constant curvature bend,it will create constant bending moment and fromthis constant bending moment the equivalent normal force will be calculated.●All equivalent normal forces will be applied at the bottom of the curved section where it is theboundary between the curved and straight section.This is a conservative assumption that will overestimate the bending moment and equivalent normal force in the bend.●The friction created by equivalent normal force will be added to3D soft-string model at theboundary where the straight and curved sections intersect.●This simple model will take the pipe stiffness into account even for constant curvature well-pathas well as continuous contact of the wellbore-wall and the pipe.The following sketch shows how the model will work in a bend.As it mentioned above the assumption is that the curved section is fixed at one point and the constant bending moment,M is applied at the support.The aim is to calculate the amount of additional normal force that is created due to bending moment,M.One point that should be considered here is that the normal force F is perpendicular to the curved at each point and this is the reason that a constant bending moment will be created along the bend. So the assumption of taking the arm length equal to the curve length for calculating the bending moment is valid.(Figure1)In the real wellbore the start of the bend considered as fixed end(support-end)and the additional normal force is calculated at other end of the curved section as follows;We start with calculating bending moment as following;(1)(2)Substituting equation(1)into(2)will give;(3)Force Fstiffis the additional normal force due to pipe stiffness in the bend.This force also represents the force required to shape the string into the same shape as the borehole.Now with equation(3)and the assumption of coulomb friction model the frictional force from F will be calculated as follows;(4)The soft-string model was developed was in the form of(5)The stiff-string model has the same form except the F1will be replaced by F*1in which:(6)The general stiff-string axial load is the superposition of the general3D soft-string axial load and the additional frictional force as follow:(7)In order to study how the model works,the model has been implemented into two planned wells which the results are showing below.It is worth to mention that for both wells the pick-up hookloads are evaluated.Both wells are build and hold type wells.The wells specifications have been summarized in Table2. Two wells have been planned such that the second well is for more extreme case where the DLS ofwell Figure1—the curved section fixed at one end is experiencing constant bending moment along the constant-curvature bend7#2is ten times higher than the one for well #1.As Figure 2shows the results of the 3D soft-string and stiff-string model,the effect of bending stiffness will not go beyond 0.1%for this well.The well#2reaches to the target at 1140mMD.Figure 3shows the results of soft and stiff-string hookloads when the friction coefficient of 0.25is used.Figure 4shows the calculations for the same well for very extreme situations with friction coefficient of 0.4.As it has been shown in both Figures 3and 4,the effect of bending stiffness will not exceed 1.05%for friction coefficient of 0.25and 1.9%for friction coefficient of 0.4which still is small and negligible.Table 3summarizes the difference that is introduced in the calculations for both wells for two cases;one with the bit at TD and one with the maximum difference.As it is expected maximum error will take place when the BHA is entering and/or exiting the curved section.Table 2—Two wells that used for case studies for new stiff-string modelSpecificationsWell #1Well #2KOP,m900900DLS,°/30m330Horizontal Length,m150150Drill pipe (OD,ID),in.(5Љ,4Љ)(5Љ,4Љ)BHA (OD,ID),in.(8Љ,3Љ)(8Љ,3Љ)BHA Length,m6060Mud Weight,s.g.1.28 1.28Friction Coefficient 0.250.25,0.4Figure 2—Comparison of the soft-string and stiff-string model for planned well with curved section DLS of 3°/30m 8Increasing the pressure will have a small effect on the hookload.However for a static drillstring,the static friction coefficient can be very high and some effect of stiff pipe can be observed when starting to move the static drillstring.It also has to be mentioned that drillstring is supposed to have axialmovement Figure 3—Comparison of the soft-string and stiff-string model for planned well with curved section DLS of 30°/30m with friction coefficient of0.25Figure 4—Comparison of the soft-string and stiff-string model for planned well with curved section DLS of 30°/30m with friction coefficient of 0.4Table 3—The comparison of soft-string &stiff-string models intwo example wellsWell no.friction coefficient difference for bit @TD (%)Max.difference (%)10.250.020.10.40.0260.1520.250.03 1.050.40.05 1.99with no rotation.For this reason in the second example well the pipe stiffness has increased to double in order to figure out whether it has a considerable effect on the resulting hookload.As it has been revealed in Figure 5the effect of doubling the bending stiffness compared to the soft-string model will not exceed2.1%.The difference between soft-string and stiff-string hookload again for two cases one for bit at TD and the other for the maximum difference for pipe with different degrees of stiffness has been summarized in Table 4.Different degree of stiffness has been used here in order to mimic the induced additional stiffness due to pressure differential across the pipe.Most of the well-path are of constant trajectories designs except for some rare cases that micro doglegs or tortuosities are introduced in the wellpath that do not seem to have considerable effect on additional normal force.The reason,as it has been shown above new approach is that,the major part of the additional normal force will be created by moving of the stiffer pipe (i.e.BHA and DC)inside the curved section (i.e.Build-up and/or drop-off).In other words drillpipe does not have much influence on the extra normal force that is created.This is due to low bending stiffness of the DPs compared to BHAs &DCs.At the same time for the stiff pipe,it tends to get a smooth constant curvature through a bend rather than to get the shape of micro-doglegs and this means that assumption of constant curvature well-path is fairly a good assumption.In the case of high tortuous well-path in which the wellbore wall and pipe are point-contacted,the assumption of full-contact of wall and pipe might overestimate the contact area and hence the friction between drillstring and borehole (Menand,2006).However it could be mentioned that the distribution of side forces for both cases are different.In other words the normal forces are distributed along the length of the pipe for soft-pipe whereas it has only been concentrated at contact points (points A,B &C in Figure 6)for stiff-pipe but it has the same magnitude for both cases.This is where the soft-string will underestimate the friction since it neglects the effect of bending stiffness on normalforce.Figure 5—Comparison of the soft-string,stiff-string and the double-stiffness hookloadTable 4—Comparison of different stiffness for well#2andfriction coefficient of 0.25Stiffness (%)difference for bit @TD (%)Max.difference (%)1000.03 1.051500.045 1.571800.053 1.882000.06 2.110If the near bit data is used as input instead of ordinary survey data,and hookload calculations will perform for small intervals,then soft-string model overestimate the friction in the wellbore.This is because in reality the pipe will never smoothly follow the well-path.Moreover,our stiff-string model also will calculate very high normal forces when the near bit data are used.The stiff model explained above works robust for ordinary survey data and wellbores that are not highly tortuous.Critical limit for soft-string versus stiff-string modelingIn this section the new stiff-string model presented above has been used in order to figure out the critical limit for soft-string model.In other words,the critical survey distance that soft-string model still gives reasonable results with less that1%error for torque and drag calculations have been studied.As it has been mentioned in equations(1),(2)and(3)in this section:(8)And the equation(9)for the relation between radius of curvature,R,and dog-leg severity,DLS as long as constant-curvature trajectory is concerned:(9)Equation(8)then can be written as;(10)Or;(11)The assumption is that the soft-string model is precise enough to be used if the additional frictional force due to pipe stiffness is not greater than1%of the axial force at the particular depth that the calculation is performed;i.e.inequality(12),(12)(13)By combining inequality(12)and equation(13);(14)Based on equation(10)and inequality(14),one can write;(15)Or inequality(15)can be written as;(16)Figure6—Point-contact illustration of pipe and a highly-tortuous wellboreOr;(17)Inequality(17)can be re-written in terms of radius of curvature,R.From equation(9)the value for R can be replaced by DLS in the inequality(17);(18)Inequality(18)will tell us that for L values greater than the right-hand side of the inequality the soft-string model for the specific type of drillstring(DP,DC,...)and specific wellbore curvature at particular depth with some value for axial force will give results with less than1%error and hence is still precise enough to be used.For L values less than right-hand if the inequality,the stiff-string model presented in section4should be used.For better understanding of the above criteria,the example wells from Table2in section4have been used.Figure7shows the results of sensitivity analysis for specific drillcollar with(OD,ID)of(8Љ,3Љ)for the parameters DLS,and axial force(Faxial)in order to find out how they will affect the critical limit (L).As it has been shown in Figure7,for example the critical survey distances for BHA with(OD,ID) of(8Љ,3Љ)and DLS of3°/30m,ϭ0.25and axial force of10KN is72.2m while the critical distance for drillpipe with(OD,ID)of(5Љ,4Љ)and the same values of DLS,and axial force is6.5m.This means that use of soft-string model for surveys having smaller distances than72.2m for drillcollar and6.5m for drillpipe will give an error larger than1%.This is where,based on our criteria,new stiff-string model should be used.Assuming constant DLS,and Faxial,the relation between critical distances for drillcollar to drillpipe based on inequality(18)is;(19)Figure7—Critical survey distance calculations for soft-string versus stiff-string model for two example wells。
外研版八年级下册单词
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外研版八年级下册单词Module 1.1. smell [smel] n. 气味;v. 有……的气味;闻;闻出。
2. soft [sɒft] adj. 软的;柔软的。
3. sour ['saʊə(r)] adj. 酸的;馊的。
4. cookie ['kʊki] n. 小甜饼;曲奇饼。
5. Mm [m] 嗯(表示味道好)6. pizza ['piːtsə] n. 比萨饼。
7. lovely ['lʌvli] adj. 令人愉快的;可爱的。
8. done [dʌn] adj. 做完的。
9. try [traɪ] n. 尝试;努力;v. 尝试;试图;努力。
10. have a try 尝一尝;试试看。
11. pie [paɪ] n. 馅饼;派。
12. sound [saʊnd] v. 听起来;令人觉得;n. 声音。
13. sweet tooth 对甜食的爱好。
14. salt [sɔːlt] n. 盐;食盐。
15. jam [dʒæm] n. 果酱。
16. for [fɔː(r)] prep. 用于;(表示持续时间)达。
17. favourite ['feɪvərɪt] adj. 最喜欢的;n. 特别喜爱的人(或事物)Module 2.1. ever ['evə(r)] adv. 曾经;从来;在任何时候。
2. enter ['entə(r)] v. (使)参加;(使)报名。
3. competition [ˌkɒmpəˈtɪʃn] n. 比赛;竞争。
4. prize [praɪz] n. 奖品;奖项。
5. first prize 一等奖。
6. dream [driːm] n. 梦;梦想;v. (dreamed/dreamt, dreamed/dreamt) 做梦;梦想;想到。
7. afford [ə'fɔːd] v. 买得起;付得起。
软起动器 SOFT S RTER
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2、限流起动 HF01设置为1,设置起动电流限制百分
比ls(HF09),转矩提升电压(HF04),电 动机电流随着电压斜坡增长直至ls,电流不 再增长,速度随即上升直至满速后电流下降 到额定电流le以下。
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3、突跳起动 HF01设置为2,设置起动斜坡时间
(HF07),转矩提升电压(HF04)U0,突 跳电压百分比(HF05)和突跳时间t (HF06),电动机随输入电压突然增加而快 速起动,电压再按照斜坡起动方式上升,速 度随即上升直至满速。适宜起动大惯性负载。
动机。
3、软起动器会产生谐波到电网去。 4、只能短时运行。
代替绕线电
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四、 接 线 图
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用户可选择配置旁路接触器, 在起动完成后自动切换至旁路 运行。选择该工作方式需安装 一个交流接触器
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五、起动方式
1、电压斜坡起动 HF01设置为0,设置起动斜坡时间t
(HF07),转矩提升电压(HF04)U0,电 动机随输入电压增加而起动,速度随即上升 直至满速。
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六、停车方式
1、自由停车 自由停车就是软启动器直接从电压Ue降
为0V,电动机随着惯性运转,直至停车。
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2、软停车 软停车就是软启动器从电压Ue按照斜坡
下降时间降为0V,电动机随着电压下降转速下 降直至停车。
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SIMOSTART MV软起动器
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选择软起动器
了解电动额定电压和额定电流即可。 选择起动器额定值为电动机额定电流85% 但是只要满足: I起动器>I电动机* TL/TN 起动期间TL/TN不低于0.85
深度学习常用的图形模板
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Large NN
Med NN
η
Small NN
SVM,LR etc
Amount of Data
Why does Deep learning work?
One hidden layer neural network
Input X
X = A[0]
Hidden a[1]1 a[1]2 a[1]3 a[1]4
1x5 conv, 2 padding
1x7 conv, 3 padding
Filter concatenation
Auxiliary Classifier Auxiliary Classifier
Softmax FC FC Conv
Avg-Pool
Softmax FC Conv
Avg-Pool Inception Inception Max-Pool Inception Inception Inception Inception Inception Max-Pool Inception Inception Max-Pool
Input
Output FC-512 Max-Pool Conv3-128 Max-Pool Conv3-64 Conv3-64 Max-Pool Conv3-32 Conv3-32 Conv3-32 Conv3-32
Filter concatenation
1x1 convolutions
3x3 convolutions 1x1 convolutions
Previous layer
(a)
Filter concatenation
1x1 conv.
1x1 conv.
Pool
soft什么意思
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soft什么意思soft的中文释义为软的,柔软的;温和地。
短语:soft power,软实力。
例句:Her soft brown eyes fixed on Kelly.她温柔的棕色眼睛凝视着凯利。
soft 英[s?ft] 美[s??ft]adj. 软的,柔软的;温柔的,温和的;软弱的adv. 柔软地;温和地短语:soft tissue 软组织soft soil 软土,软泥地soft landing 软着陆;软性经济滑坡soft drink n. 软饮料;不含酒精的饮料soft power 软实力;柔性国力soft ware 软件;语言设备;设计计算法;程序设备例句:1.Pat it dry with a soft towel.用柔软的毛巾将它轻轻拍干。
2.Her soft brown eyes fixed on Kelly.她温柔的棕色眼睛凝视着凯利。
3.Her voice had a soft Welsh lilt to it.她讲话的声音柔和而抑扬顿挫,有些威尔士口音。
4.Pat your face dry with a soft towel.用软毛巾把脸搌干。
5.The grass was soft and springy.草柔软而有弹性。
6.The foliage was soft and feathery.叶子柔软,有如羽毛一般。
7.The moss was soft and furry to the touch.苔藓柔软,摸起来像绒毛。
8.Julia#39;s soft heart was touched by his grief.朱莉娅心肠软,见他悲伤动了恻隐之心。
9.He gave his counter a polish with a soft duster.他用柔软的抹布将柜台擦得亮亮的。
10.He had rich, soft ebony hair.他曾有一头浓密、柔软的黑发。
PORON与泡棉的特性
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現已經成為 OA (辦公室自動化設備) 與 PC/NB (電腦) 工業必備條件
輕, 薄, 短, 小
先進 精密儀器, 通訊器材, 設計趨勢
跟進 21 世紀市場需求 !!!
什麼是 PORON SR ?
SR PORON = Slow Rebound
慢速回彈
PORON SR
提供 更 好 的 吸 振, 密封, 功 能 !!
• (2) SRS 抗 靜 電 系 列
Anti-static SRS PORON with Anti-static PET Film Supported ~ASRS-40PA (available now)
• (3) 超 薄 系 列
SRS-70P, MS-40P, MS-32P, MS-24P, and MH-48P
FH-48C
MO-48
超硬度 高摩擦系數
阻燃功能
全新腳墊產品
MX–48HF
什麼是 PORON MX-48 HF ?
可承受更高的重量
PORON MX - 48 HF
比現有 FH-48 硬度 超過 兩倍
更高的摩擦系數
PORON MX - 48 HF
比現有 FH-48C 摩擦系數 超過 兩倍
各種電器用品
點:
2) 低 故 障 率
3) 加 工 省 錢 4) 零 污 染
什麼是
® NanNex
?
• 矽膠原料發泡品
• 據有高耐候性與阻燃
功能的緩衝材料
• 高彈性
NanNex 系 列 優 點
® •矽
膠 原 料, 高 密 度
• 耐 候 性 強 180℃ ~ -40℃
•高彈性 • 防 水, 高 氣 密 性
mild的同义词
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mild的同义词mild表温柔的; 温暖的意思,那么你知道mild的同义词有哪些吗?接下来小编为大家整理了mild的同义词,希望对你有帮助哦!mild的同义词辨析:gentle, mild, soft, tender, moderate这些形容词均含有"温和的,柔和的"之意。
gentle :指温柔、亲切、优雅。
常含有节制和意味。
mild :用于人时,指天性温顺,脾气好,不放肆粗野;用于物时,主要指适度,程度上相当缓和给人以愉快感觉。
soft :侧重柔软或安稳、光滑,使人不感到粗糙或严酷。
tender和gentle意思很接近。
指人的感情细腻、温情慈爱和有同情心,侧重心理素质。
也可指物的柔嫩等。
moderate :中性词,指温和稳健,有节制,不走极端。
词组习语:have a soft spot for1. 爱上;喜欢;钟情于soft option1. 容易的选择缓刑根本不应当被看作是司法机关随意的选择。
probation should in no sense be seen as a soft option by the judiciary.soft touch1. (非正式)对别人的要求容易答应的人mild的例句:1. His captaincy of the team was ended by mild eye trouble.他由于患轻度眼疾而不再担任队长一职。
2. It wasn't anything serious. A mild stomach upset, that's all.没什么大不了的。
只是胃有点不舒服,没别的。
3. The wine goes with strong and mild cheese alike.喝这酒的时候可以搭配浓乳酪或淡乳酪。
4. Meteorologists have predicted mild rains for the next few days.气象学家预测接下来的几天有小雨。
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3、resonant DC-loop converter 4、high frequency loop integer half-wave converter
U AC U C 0 sin 0 (t t 0 ) Z0 U C 0 ) cos 0 (t t 0 ) Z 0 I L 0 sin 0 (t t 0 )
characteristic impedance
0 1 / LC
Z0 L / C I L0 UC0
1、discontinuous mode(Ts > 2To)
t 0 ~ t1
I L0 0
A
C
A
C
iL
iL
B UO Ui/2 B UO
u AC
UC0
Ui UO 2 2U O
★
Ui/2
TS
Ui Ui Ui uC iL uC (t ) ( U O ) ( U O ) cos 0 t 2 2 2UO uC (t 1) U i t2 t3 U Ui / 2 0 i L (t ) O sin 0 t Z0 t1 -2UO TO Ui t t 1 ~ t 2 uAC UO ★ S1 D1 S2 2 -Ui t1 0 I L0 0 U C 0 U i 180 180 180
Io Uo=0.8Ui Uo=0.2Ui ZVS ZCS 0
discontinuous mode
Ui
iL
Ui/2 C1 A C2 Ui/2 S2 D2 L B
D4 D6
S1
D1
iL
uC
C C
D3
D5
Uo C3 R
TS Ui
iL
uC t2 t3 t1
0t
D1
180
0.5
1.0
continue mode
Chapter 5 resonant soft switch converter
★ two energy converted modes for switch circuit:
1 abrupt、forced energy converting hard switching: 2 dominant applied area : 10W~500kW 3 frequency→ 20kHz revolution
★ the localization of hard-switch for high frequency converter
1、second breakdown restriction:
parameter optimized design
iC
SOA
ZCS
LL CL
2、calorific热学 restriction:
★ conducting rule:
S 1 / D1 ON : S 2 / D 2 ON : u AB u AB Ui 2 U i 2
d 2iL 2 2 i 0 L 0 IO dt2
i L (t ) I O ( I L 0 I O ) cos 0 (t t0 )
discontinue mode(Ts > 2To)
iL
Ui/2 C1 S1 D1 A C2 Ui/2 S2 D2
★ S:before S turning on,
S1 and S2 all turned off, S hang in the air 悬空 so ZV+ZC on
Ui
iL
L B
uC
C C
sufficiently heighten switch frequency
du / dt
N
ZVS di / dt
uCE
3、snubber restriction:
distributed parameters can be utilized, reduce the cost, advance efficiency
Ui 2 U u AB i 2 U u AB i 2 U u AB i 2
Ui UO 2 U u AC i U O 2 U u AC i U O 2 U u AC i U O 2 u AC
i L (t ) I L 0 cos 0 (t t 0 ) uC (t ) U AC (U AC
soft switching:
1 natural、flexible energy converting; LC resonant +ZCS/ZVS 2 At 80 age: DC-DC is abroad applied / DC-AC is far immaturity 3 control strategy:optimal discrete pulse modulation adjoining相邻 space current vector modulation discrete time integral slide-mode control 滑模 …… 4 aim→ green revolution
4、EMI restriction:hard-switch du/dt、di/dt → EMI
① Miller effect: ΔUon large→Ig shunted large,coupling interfered ∨ ZVS
pole capacitor
② CDS/CE loss: when turn on, CU2OFF/2 heating be lost inside device∨ ZVS ③ be apt to oscillate with distributed inductance∨ be utilized to resonance SS
0t
D2
180
A C
S1&S2 all off
Ui U U O ) (U O i ) cos 0 t 2 2 uC (t 2) 2U O U Ui / 2 i L (t ) O sin 0 t Z0 uC (t ) (
A
C
iL
Ui/2 B UO
iL
Ui/2 B UO
but ZC+ZV off
TS
C2 Ui/2 S2 D2
iL
0
uC
t2 t1 t3
0t
★ D:
ZC turn on but in 0 and t2 point, S1、S2 flow the reverse recovered current of D2、D1 (S not ZV turn on)
can adjust output current
TO S1
180
S2
180
D2
180
all off
iL
2、continuous mode—1 (To < Ts < 2To)
Ui/2 C1 Ui
S1
D1 A
iL
L B
uC
C C
D3
D5
Uo C3 R
D4 D6
★ S:not ZC、not ZV on;
§5-1 load resonant converter
1 Series Load Resonant converter
A Ui/2
Ui
iL
Ui/2 C1 A C2 Ui/2 S2 D2 L B
D4 D6
S1
D1
iL
uC
C C
D3
D5
Uo C3 R
★ SLR resonance equivalent circuit:
D is in flywheel state.
R
ZV+ZC off ★ D:ZC on、off
discontinuous mode(Ts > 2To) ★ S:S all turned off before
it turn on,S hand in the air
Ui
iO
Ui/2 C1 A C2 Ui/2 S2 D2 L S1 D1
iL
D3
D5
L1
C C C3 B
D4 D6
Uo
iC
ZV+ZC on ★ S:when S turning off, parallel
iL
D3
D5
L1
C C C3 B
D4 D6
Uo
iL iC
C IO B
iC
R
Ui/2
S2
D2
di uC U AB L L dt i L iC I O duC d 2iL iC C LC 2 dt dt
△ suppose : L1 is large enough,
the current is constant during Ts:
★ classification for resonant converter
1、load resonant converter:
① voltage source type series resonant converter:
Series Load Resonant converter (SLR) Parallel Load Resonant converter(PLR) mixed resonant converter ② current source type parallel resonant converter (inducted calefaction SCR)
D5