qconshanghai-20141016-zhangpengshan
基于单目视觉的无人水面艇水面目标测距方法
2021年第40卷第2期传感器与微系统(Transducer and Microsystem Technologies)47DOI : 10.13873/J. 1000-9787(2021)02-0047-04基于单目视觉的无人水面艇水面目标测距方法**收稿日期:2019-08-13*基金项目:国家自然科学基金面上资助项目(61771223)赵明绘,王建华,郑翔,张山甲,张程(上海海事大学航运技术与控制工程交通行业重点实验室,上海201306)摘要:针对单目测距时相机高度和俯仰角难以测量的问题,提出一种相机高度和俯仰角的标定方法,在 此基础上提出一种水面目标的单目测距方法,并分析影响测距精度的因素。
通过相机标定,获得与水面共 面的标定板上的网格坐标系到相机坐标系的外参,计算相机高度和俯仰角;识别出图像中水面目标所在区 域,计算该区域像素纵坐标最大值,及其对应的横坐标的平均值,将组合得到的坐标作为观测点的像素坐 标;根据相机内参、透视投影关系和刚体变换,获得观测点在无人艇附体坐标系下的三维信息,进而计算观 测点的距离。
通过实验验证了所提方法的正确性和有效性。
关键词:单目视觉;无人水面艇;相机高度;相机俯仰角;观测点;测距中图分类号:TP212.9 文献标识码:A 文章编号:1000-9787(2021)02-0047-04Monocular vision based water-surface target distance measurement method for unmanned surface vehiclesZHAO Minghui , WANG Jianhua, ZHENG Xiang, ZHANG Shanjia, ZHANG Cheng(Marine Technology & Control Engineering Key Laboratory ,Shanghai Maritime University ,Shanghai 201306,China)Abstract : Aiming at lhe problem that lhe height and pilch angle are difficult to measure during monocular ranging , a method for calibrating camera height and pitch angle is proposed , and a water-surface target ranging method based on monocular vision is proposed , and lhe factors affecting lhe ranging precision are analyzed ・ Through camera calibration , obtain the extemal coordinate of the grid coordinate system on the calibration plate that is coplanar with the waler surface to lhe camera coordinate system , calculate the camera height and the pilch angle. The area of the target on water surface in the image is identified , the maximum value of the ordinate of the pixel in the area ,and lhe average value of the corresponding horizontal coordinate are calculated ,and the combined coordinate is taken as the pixel coordinate of the observation point. According to the camera internal reference , perspective projection relationship and rigid body transformation , the three-dimensional information of the observation point in the coordinate system of the unmanned boat is obtained , and then the distance of the observation point is calculated. The correctness and effectiveness of the proposed method are verified by experiments ・Keywords : monocular vision ; unmanned surface vehicle ; camera height ; camera pitch angle ; observation point ; ranging0引言无人水面艇由于其可以执行更危险的以及不适于有人 船只执行的任务而吸引了广大研究人员⑴。
ACNeson Tel list(上海)
NAME & TEL LIST Sep-04 4/F, East Ocean Centre(Phase II), No. 618 Yanan East Road, Shanghai, P.R.C. 200001上海市延安东路618号东海商业中心二期四楼邮编200001TEL: 53855000FAX: 53855111DIRECTORS:SECRETARY:RETAIL Fax: 53855261GLEN MURPHY GM--881赵洁CAROL ZHAO809邱宝珠AGNES KHOO AK--871吴月华SHIRLEY WU614CLIENT SERVICES UNIT李光明KENNETH LEE KL--152邱琦TRUDEY QIU320钟少雯MANDY CHUNG MC--341 JEFFREY KELSCH861倪伯恩BRIAN NEGLEY BN--671孙真LAURA SUN406韦邦华CANDISE WAI343桂嫣DEBORA GUI635庾良建HANS YU HY--625黄雅怡RITA WONG640江文杰KONG MAN KIT667张小玲LINDA ZHANG LZ--807杨绮珊YVONNE YEUNG318朱莹莹SHIRLEY ZHU347陈丽洁RITA CHAN RC--401杨志刚SAVIO YEUNG428熊林娜LINDA XIONG316黄家敏JOSEPHINE WONG JW--821吴俊华CINDY WU665张伟DAISY ZHANG824杨春芳BETTY YANG366叶丽莲LI LIAN YAP LY--620姚芳FANTAN YAO311莫琼JANE MO367 GERALDINE DELA CRUZ GD--615荆攀OLIVE JING632范奕瑾KIKI FAN633陈沐晖DAISY CHEN DC--348陶俊CONNIE TAO796戴喆KEVIN DAI413 KOSTA MEGALOCONOMOS KM--350姜敏JIANG MIN156和平FRANCIS HE412 PHILIPPE COQUELLE PC--891刘茵SOPHIE LIU601褚晓筠VICKY CHU417 CHING CHIEW LIAN CL--153郑开来ANGELINE ZHENG416赵质孝JASPER CHAO427步金玲JINLING BU JLB--602王琦JAMES WANG402王凡JANNET WANG313许丽平LYNN XU425丁厅ROY DING669 CUSTOMIS Fax : 53855251 杜晓鸣MALCOLM DURETAILER SERVICES UNITRESEARCH(QUANTI&QUALI)宋颖SONG YING317刘鹤CRANE LIU629马擎天KELVIN MA630高炜GAO WEI154宋静媛RAIN SONG404陆少龙ERIC LOKE860冉琳LYNNE RAN405苏燕CINDY SU312刘鑫LUCY LIU621卞伊琳ANNY BAIN118孙怡KELLY SUN605骆赵霏VINCENT LUO138陈春慧REBECCA CHEN139徐俞JENNIFER XU616徐敏洁JESSICA XU619肖勍ANNIE XIAO349熊远兰 LINDA XIONG695许晓莹JESSIE XU844禤华超ALVIN HUEN618呼晓楠NIYA HU610黄慕健EVELYN HUANG626丁峰FRED DING314张章新CALMAN ZHANG622张蕾ANTHIA ZHANG 721MEASUREMENT SCIENCE殷百鸣KELLY YIN631曹宁钏KATHERINE CAO771吴伟强KENNETH NG851戴妮娜NINA DAI342陈琪超BENNY CHEN794金鑫KENDRA JIN429韩金元DENNIS HON639苏春艳SU CHUN YAN634王羽ANNA WANG608周婧JEAN ZHOU696佟磊 TONY TONG731季瑛JI YING609蒋 玲J IANG LING606陈月琴JESSICA CHEN158任云霞CLOUDY REN636陈卓敏ANDRIY CHEN151黄磊ALMA HUANG陈晰CIPHER CHEN369刘薇南VIVIAN LIU362 FIELDWORK-QUANTI李扬铭EMI LI344戈华ANGEL GE345陈必庆BEN CHEN BC--141李民REBECCA LI117付光文GWEN FU 783杨子君KATHY YANG122赵敏SHIRLEY ZHAO125DCU王翔俊WANG XIANG JUN135黄海燕HAI YAN136FIELD WORK (EC)吴琼华WU QIONG HUA124蒯振冰KUAI ZHEN BING129FIELD WORK (SH)徐峻XU JUN142龚丹GRACE GONG786陆晓萍PENNY LU133张张DOUBLE ZHANG361马海芳MA HAI FANG315朱韵丹MONICA ZHU603干开潜GAN KAI QIAN140车祖文朱曙光李寿浩钱蓓华KALY QIAN 370董怀龙叶红军许军马瑛MA YING368董飞江国强张立伟FIELDWORK-QUALI朱斌ZHU BIN319纪勇祥李建军智顺蔡利华LITTLEFIELD CAI131钱珏JANE QIAN128余军YU JUN628闫睿姚佑怀严其林葛伟文FANNY GE134史东敏SHI DONG MIN761李振张娟李向民陈一峰CHEN YI FENG694张荣红李金龙艾川华张捷ZHANG JIE 364高培广孙军顾青丁伟DING WEI784康志强葛国庆符士军QA张健ZHAN GJIAN612李逸玮张勋李翠于慧林LINDA YU123耿东洪海翔赵波吴旭增许琳MICHELLE XU613王德军吕 渊朱祎CENSUS TRAINER耿吉吉GENG ZE363 E&C吴成钢WU CHENG GANG 365韩赟JANE HAN113王馨WANG XIN 114CORE FUNCTION金丽瑾JIN LI JIN119马莹LERA MA781ADMIN谭仁忠TONEY TAN TT--801BOARD ROOM899张剑萍WENDY ZHANG802ROUND TABLE699 MEDIA Fax : 53855271方珏KATE FANG0--Reception (804)SOFA ROOM799李鸿JOYCE LEE617M&A671 CLIENT SERVICES--ADEX&TAM杨亚静LUCY YANG841RETAIL INDEX309何炬JUDY HE JH--421徐晓艳JOY XU806NETRATING808柴立华SHELLEY CHAI424周蓓捷BECCY ZHOU408MIS Hot line: 53854513罗雪霏JESSICA LUO422周晔斐YOLANDA604吴铁民TOMMY WU842翟宇KEVIN ZHAI803夏怡VIVIAN XIA624王征RENEE WANG420戴家裕JASON DAI845周元盛SAM ZHOU788吉纯瑶SAMMI JI423薛韬文AVA XUE659FINANCE Fax: 53855281林祎JULEP LIN843杜向东DONEY DU DD--121汪静JOY WANG 853 ADEX TAM马 军JUSTIN MA JM--852薛虹CADDIE XUE854徐蓓君LUCY XU426刘碧骅ROSE LIU407伍敏仪AMY NG409单虹HELEN SHAN855董彦洁EMMA DONG130薛 红CHRISTINA SHUE856李敏NANCY LI857史明德SHI MING DE403黄振华GRACE HUANG410叶胜平YE SHENG PING403HR Fax: 53855191陈英杰SALLY CHEN SC--680乔喆旻COCO QIAO684李黎KAREN LI681熊嫣ANGEL XIONG683 NETRATINGS CORPORATE COMMUNICATION朱文静STEPHANIE ZHU418徐浩HOWARD XU414荣锦华HELEN RONG637赵洁CAROL ZHAO673。
水平管内R1234yf的流动沸腾换热特性
化工进展Chemical Industry and Engineering Progress2022年第41卷第7期水平管内R1234yf 的流动沸腾换热特性冯龙龙1,钟珂1,张羽森1,商庆春2,贾洪伟1(1东华大学环境科学与工程学院,上海201620;2山东电力建设第一工程有限公司,山东济南250200)摘要:通过实验研究了环境友好型制冷剂R1234yf 在内径为0.5mm 的水平圆形微通道内的流动沸腾换热特性,测量了不同工况下R1234yf 的沸腾换热系数(HTC ),并与传统制冷剂R134a 进行了对比,分析了质量流速、热流密度和干度对换热系数变化规律的影响。
实验条件为:饱和温度(17±1)℃,质量流速1000~2500kg/(m 2·s),热流密度25~143kW/m 2。
实验结果表明:R1234yf 的换热系数随着热流密度的增大而显著增大,而质量流速和干度的影响较小,核态沸腾为其主导换热机制。
对比R1234yf 和R134a 在相同工况下的换热特性,发现两种工质的平均换热系数差别较小,并均随着热流密度增大而逐渐增加,但是R1234yf 发生干涸(Dryout )时的热流密度小于R134a 。
将实验数据与已有文献中的核沸腾主导的经验关联式的预测结果进行了对比,得到了较好的吻合。
关键词:制冷剂R1234yf ;微通道;流动沸腾;关联式中图分类号:TK124文献标志码:A文章编号:1000-6613(2022)07-3502-08Flow boiling heat transfer characteristics of R1234yf in horizontalmicrochannelFENG Longlong 1,ZHONG Ke 1,ZHANG Yusen 1,SHANG Qingchun 2,JIA Hongwei 1(1College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;2ESPCO1ElectricPower Construction Co.,Ltd.,Jinan 250200,Shandong,China)Abstract:The flow boiling heat transfer characteristics of environmentally friendly refrigerant R1234yf in a 0.5mm horizontal circular microchannel were studied experimentally.The heat transfer coefficients (HTCs)of R1234yf were measured and compared with that of R134a,and the effects of mass flux,heat flux and vapor quality on HTC were analyzed.The saturation temperature was (17±1)℃,and the mass fluxes vary from 1000kg/(m 2·s)to 2500kg/(m 2·s)with heat fluxes ranging from 25kW/m 2to 143kW/m 2.The experimental results showed that the HTC of R1234yf in 0.5mm microchannel increases with the increase of heat flux,while the mass flux and vapor quality showed a weak influence on it.The trend indicated that nucleate boiling was the dominant mechanism for flow boiling heat transfer.In addition,the heat transfer performance of R1234yf and R134a were compared under the same working conditions.The HTCs of R1234yf and R134a were almost identical and both increased with the increase of heat flux,but the heat flux for the occurrence of dryout of R1234yf was smaller than that of R134a.Finally,the experimental data for the two refrigerants were compared with two nucleate boiling-dominated correlations from literature and good agreements were obtained.研究开发DOI :10.16085/j.issn.1000-6613.2021-1823收稿日期:2021-08-25;修改稿日期:2021-11-01。
VAV空调系统的变静压控制和研究方法
变 风 量 空 调 系 统 是 AB 世 纪 CB 年 代 中 期 在 美 国 开始使用的一种新型空调系统 D 经过十几年的普及和 发 展 ,目 前 在 日、美、欧 等 国 得 到 了 广 泛 的 应 用 ,在 高 层建筑的使用率已达 EBF 以上 。 在我国 , 随着境外设 计事务越来越多地进入设计市场和作为智能建筑的 大型商业办公大楼的大批建设 ,898 空调逐渐得到了 越来越多的应用 。 其控制策略有从定静压控制方式逐 步演变到变静压控制方式和总风量控制方式的趋 势 。 但是目前国内的 898 空调系统的建筑 效果还远远 不 尽人意 。 定静压系统在上海成功的实例有上海期货大 厦 、 上海浦发银行 、 中国保险大厦等 , 在其他地区的成 功率还相当低 , 变静压系统目前在国内还没有完 全成 功的实例 , 总风量控制主要还处在实验室研究 阶段 。 笔者参与由日建设计和上海建筑设计研究院深化的 上海花旗集团大厦的弱电系统的建设 , 该大楼的课题 控制方式为变静压控制方式 。 为此我们和国外技术专 家做过两次交流 ,开始研究变静压控制方式的实施 。 变风量空调方式起源于高 速送风空调 系统 , 是目 前欧美主要采用的变风量空调设计方式 , 日本则较 多 地采用低速送风的变风量空调系统 。 本文对国外使用 的变静压控制系统和策略加以综合 , 旨在进一步研 究 变风量变静压系统的控制策略和工程实施方 法 , 为建 设成功的变静压空调系统的案例做准备 。
Krakow 和 Lin %1995& 提 出 了 一 个 VAV 系 统 中 风 机控制环的确定 PI 系数的分析的方法 $ 此分析旨在提
供一种基于送风机和空气分配系统的压力和流速性 能的调节方法 $ 在一个 HVAC 系统实验室中发现这个 调节方法能够提供一个很好的性能 $
社区老年慢性病患者中医药服务需求影响因素研究
·社区卫生管理·社区老年慢性病患者中医药服务需求影响因素研究娄晓敏1 龚冰璐2祝玲婷1 薄海艳1(1.上海市静安区彭浦新村街道社区卫生服务中心中医科,上海 200435;2.上海市静安区彭浦新村街道社区卫生服务中心全科,上海 200435)摘要目的:对上海市静安区彭浦新村街道老年慢性病患者开展焦虑抑郁状况及中医药服务需求调查。
方法:采用单纯随机抽样方法选取于2019年8月—2022年8月在上海市静安区彭浦新村街道社区卫生服务中心门诊就诊的220例老年慢性病患者开展问卷调查,问卷内容包括其一般资料、焦虑自评量表、汉密尔顿抑郁量表及中医药服务需求。
结果:220例社区老年慢性病患者中,焦虑患者55例(25.0%),抑郁患者94例(42.7%),焦虑合并抑郁患者39例(17.7%),社区老年慢性病患者对中药指导、穴位保健、穴位敷贴、中药熏洗这4项中医药服务的需求度较高。
医疗负担、抑郁状况是对社区老年慢性病患者情志疏导服务需求具有统计学意义的影响因素(P<0.05);焦虑状况是对社区老年慢性病患者中药熏洗服务需求具有统计学意义的影响因素(P<0.05)。
结论:彭浦新村街道老年慢性病患者的焦虑、抑郁发生率均较高,应深入社区开展各类心理专题讲座、中医情志疏导沙龙及中医药适宜技术服务,将情志疏导、中药熏洗等中医药服务融入到慢性病患者的心理健康管理中,提升其身心健康水平。
关键词焦虑;抑郁;社区老年慢性病患者;中医药服务需求;影响因素中图分类号:R749.4 文献标志码:A 文章编号:1006-1533(2023)18-0006-05引用本文娄晓敏, 龚冰璐, 祝玲婷, 等. 社区老年慢性病患者中医药服务需求影响因素研究[J]. 上海医药, 2023, 44(18): 6-10; 40.Study of traditional Chinese medicine service demand of the elderly patients with chronic diseases in the community and its influencing factorsLOU Xiaomin1, GONG Binglu2, ZHU Lingting1, BO Haiyan1(1. Traditional Chinese Medicine Department of Pengpuxincun Community Health Service Center of Jingan District, Shanghai 200435,China; 2. General Practice Department of Pengpuxincun Community Health Service Center of Jingan District, Shanghai 200435, China) ABSTRACT Objective: To investigate the anxiety, depression and demand for traditional Chinese medicine(TCM) services of the elderly patients with chronic diseases in the Pengpuxincun Community of Jingan District, Shanghai. Methods: Two hundred and twenty elderly patients with chronic diseases who visited the Community Health Service Center of Pengpuxincun Community in Jingan District, Shanghai were selected with a simple random sampling method from August 2019 to August 2022 to conduct a questionnaire survey, and the questionnaire contents included the general information, self-rating anxiety scale, Hamilton depression scale and the needs of traditional Chinese medicine service. Results: Among 220 elderly patients with chronic diseases in the community, 55 cases(25.0%) were anxious, 95 cases(42.7%) were depression, and39 cases(17.7%) had anxiety combined with depression. The elderly patients with chronic diseases in the community had a highdemand for four items of TCM guidance, acupoint health care, acupoint application, and TCM fumigation and washing services.Medical burden and depression were statistically significant influencing factors on the demand for TCM emotional counseling services for the elderly patients with chronic diseases(P<0.05); anxiety was a statistically significant influencing factor on the demand for TCM fumigation washing services for the elderly patients with chronic diseases(P<0.05). Conclusion: The incidence of anxiety and depression among the elderly patients with chronic diseases in Pengpuxincun Community is relatively high, it is necessary to conduct various psychological lectures, TCM emotional counseling salons, and appropriate technical services of基金项目:同济大学医学院社区慢病管理研究项目(TUSM2020C24)通信作者:薄海艳。
2014年高教社杯全国大学生数建模竞赛上海区获奖名单 年
奖级 题号
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队员 1
刘小满 袁超宇 徐嘉灿 李凯莅 周苏田介 陈力 陈品翰 何雨宸 邹晨 黄明媚 李涓涓 余若凡 王佳俊 吕赫 江河 施浅 贾冬雨 李纬尘 贺甜甜 郑博艺 叶迪卓然 刘一鸣 王凡 刘曦阳 许哲宇 高天 何俊贤 彭瑾龙 谭昊 赵紫荆 邓志鹏 陈宗晨 宋振宇 朱旭 傅嘉豪 杨佳涛
队员 2
杨诗颖 吴艺娴 吴皓琪 陈思佳 吴金鑫 王耀辉 马扬清 许夏杰 周士强 舒静 王德泉 蒲秋实 项思远 李有方 罗盛杰 谢异 杨蕊 唐梓峻 房悦竹 邓舒文 王依宁 郭振乾 阎谨 高策 梁玉鼎 罗嘉婧 韩璐岭 胡麒 刘梦云 游杰 万强 刘文青 杨泽 沈少波 陈若冰 李健达
奖级 题号
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队员 1
队员 3
董子玥 马豪君 吴海潮 梁志栋 朱仁杰 刘杰 刘宇鹏 汤一嘉 姚佳蓉 周昭豪 姜秀财 邱爽 赵亦峰 祁玥 邓泽恒 梁思寒 王昊 王梦真 李一鸣 储鑫 高述琪 张锐
崔文韬 李佳骏 卢思佳 焦点 张霆钧 吴育蔚 朱升发 冯禹 章程 徐清悦 王川 易正翔 赵鹏 张天宇 金猛 董利宽 王天益 贾启新 权晨嘉 史沛瑶 马东发 韩俊强 石莜迪 林宜葳 陈鸣 王佳杰 田思源 陈鎏霁 张琦 张雨彤 陈步琛 朱应昶 蒋宇乔 李响 胡金政 古玮
固体废物和污染土壤制备陶粒协同处置研究综述
固体废物和污染土壤制备陶粒协同处置研究综述*杨杰1,陈羲1,孙琼玉2,郑姗姗1,沈远东2,詹明秀2(1.浙江方远新材料股份有限公司,浙江台州318014;2.中国计量大学计量测试工程学院,浙江杭州310018)【摘要】基于国内外固体废物和污染土壤制备陶粒协同处置技术的介绍,对我国的陶粒工艺研究进展及固体废物和污染土壤制备陶粒协同处置技术进行了总结。
通过对国内外学者在固体废物、污染土壤制备陶粒方面的比较发现:以污染土壤和固体废物为原料生产陶粒是在原有工艺基础上进行的升级和改进。
根据已有研究,污染土壤或固体废物的掺入量最高可达40%,且该方法制备的陶粒在抗压强度、吸水率、堆积密度、表观密度等陶粒品质方面都基本满足国家标准;在污染物处理方面,该方法制备的陶粒对重金属的固化效果较为优异,固化率最高可达99.80%。
由于制备陶粒需要高温条件,在处理过程中会出现二次污染问题。
所以在实际应用过程中需增加尾气处理装置,以达到国家排放标准。
固体废物和污染土壤制备陶粒协同处置技术不仅能有效处理污染物,同时还能够实现资源的再利用并产生可观的经济效益。
【关键词】污染土壤;固体废物;陶粒;协同处置中图分类号:X705;X53文献标识码:A文章编号:1005-8206(2024)02-0063-06DOI :10.19841/ki.hjwsgc.2024.02.009Research Review on Collaborative Disposal of Solid Waste and Contaminated Soil for Preparation of Ceramsite YANG Jie 1,CHEN Xi 1,SUN Qiongyu 2,ZHENG Shanshan 1,SHEN Yuandong 2,ZHAN Mingxiu 2(1.Zhejiang Fangyuan New Materials Co.Ltd.,Taizhou Zhejiang 318014;2.School of Metrology and MeasurementEngineering ,China Jiliang University ,HangzhouZhejiang310018)【Abstract 】Based on the introduction of collaborative disposal technology of solid waste and polluted soil preparationceramic particles at home and abroad,and the research progress of ceramic particle technology in China and the collaborative disposal technology of solid waste and polluted soil preparation ceramic particles were summarized.Through a comparison of domestic and foreign scholars in the preparation of ceramic particles from solid waste and polluted soil,it was found that using polluted soil and solid waste as raw materials to produce ceramic particles is an upgrade and improvement on the basis of the original process.According to the existing research,the maximum amount of contaminated soil or solid waste added could reach to 40%,and the ceramic particles prepared by this method basically meet the national standards in terms of compressive strength,water absorption,bulk density,apparent density,and other ceramic particle quality.In terms of pollutant treatment,the solidification effect of heavy metals was relatively excellent,up to 99.80%.Due to the high temperature conditions required for the preparation of ceramic particles,secondary pollution may occur during the treatment process.Therefore,in practical applications,it is necessary to add exhaust gas treatment devices to meet the national emission standards.The collaborative disposal technology of solid waste and polluted soil preparation with ceramic particles could not only effectively treat pollutants,but also could achieve resource reuse and generate considerable economic benefits.【Key words 】polluted soil;solid waste;ceramsite;collaborative disposal*基金项目:浙江省科技计划项目(2022C03082)收稿日期:2023-10-12;录用日期:2024-02-04文章栏目:热化学处理与烟气污染控制文章类型:综述杨杰,陈羲,孙琼玉,等.固体废物和污染土壤制备陶粒协同处置研究综述[J ].环境卫生工程,2024,32(2):63-68.YANG J ,CHEN X ,SUN Q Y ,et al.Research review on collaborative disposal of solid waste and contaminated soil for preparation of ceramsite [J ].Envi⁃ronmental Sanitation Engineering ,2024,32(2):63-68.0引言随着我国产业升级和城市功能变迁,城市因工厂搬迁而出现了大量污染地块[1-2],引发诸多环境污染和社会安全问题[3-5]。
电动平衡车安全分析及研究
电动平衡车安全分析及研究■ 朱晓鹏1,2 郑杰昌3 陈文皓1(1.上海电器科学研究所(集团)有限公司;2.上海交通大学;3.国家市场监督管理总局缺陷产品管理中心)摘 要:针对电动平衡车在实际应用中出现的主要问题进行了市场调研,研究了国内外电动平衡车的相关标准,将电动平衡车的热危险作为主要关注点进行了失效模式和影响分析(FEMA)。
基于FEMA分析结果,文中设计了电动平衡车整机和电池的试验方案,对从市场中随机抽样的产品进行了测试。
结合标准的要求和电动平衡车的产品特点,文中提出了热成像辐射定位测温点的方法,并搭建了基于无线传输技术的无线测温系统,提高温度测量的效率,降低了人为因素导致的不确定度。
文中对电池的测试设计了试验方案,并从电动平衡车行业的应用角度出发设置测试项目。
通过对测试结果进行分析,文中给出了电动平衡车开发过程中的安全提升建议以降低其热危险。
关键词:电动平衡车,安全,失效模式和影响分析,温升,电池测试DOI编码:10.3969/j.issn.1002-5944.2021.02.0033Research on Safety Analysis of Electric Self-Balancing ScootersZHU Xiao-peng1,2 ZHENG Jie-chang3 CHEN Wen-hao1(1. Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.; 2. Shanghai Jiao Tong University;3. Defective Product Administrative Center, State Administration for Market Regulation)Abstract: This paper investigated the main problems of electric self-balancing scooters and analyzed relevant standards at home and abroad. The failure mode and impact analysis (FEMA) was carried out, focusing on the thermal hazard of electric balance vehicles. Based on the result of FEMA, we designed the test plan of electric self-balancing scooters and the battery, and tested 8 electric self-balancing scooters randomly selected from the market. Combined with the requirements of these standards and product characteristics, we proposed the method of positioning temperature measurement point by thermal imaging , and a wireless temperature measurement system based on wireless transmission technology was built to improve the efficiency of temperature measurement and reduce the uncertainty caused by human factors. In this paper, the test plan of battery was designed according to the application process in the electric self-balancing scooters. Through the analysis of the test results, the paper put forward suggestions on safety improvement in the development of electric self-balancing scooters to reduce its thermal hazards.Keywords: electric self-balancing scooters, safety, failure mode and impact analysis, temperature rise, battery test检测认证电动平衡车,又叫智能平衡车、体感车、思维车、提位车等。
伟巴斯特通讯录
2014年上半年上海崇明县事业单位招聘拟聘用人员公示(第二批)
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公示时间:6月25日-7月1日联系电话:69695140联系地址:崇明县城桥镇南门路118号总工会大楼302室 (邮编202150)更多2014上海事业单位信息:21世纪人才网崇明县人力资源和社会保障局2014年6月25日序号姓名学历现工作单位(毕业院校)拟聘用单位1陈聪本科上海信昱劳务有限公司崇明县建筑建材业管理所2金欢欢本科上海余顺劳务有限公司崇明县建筑建材业管理所3顾玉萍本科上海雇员人才服务有限公司崇明县建筑建材业管理所4蒋玮杰本科上海大学崇明县建筑建材业管理所5茅哲诚本科上海师范大学崇明县建设工程安全质量监督站6黄爽爽本科上海应用技术学院崇明县建设工程安全质量监督站7李晓婧研究生大连外国语大学新华医院崇明分院8陆欣奕本科上海体育学院新华医院崇明分院9朱金鑫本科上海市邮政公司崇明县邮政局新华医院崇明分院10顾诗卉本科上海海事大学新华医院崇明分院11徐倩綪本科上海展华电子有限公司崇明县第二人民医院12李琳本科上海冬升劳务有限公司崇明县第二人民医院13王哲凡本科上海电力学院崇明县传染病医院14沈佳谊本科华东师范大学崇明县卫生学校15陆佳聪本科上海洪福保障咨询有限公司三星镇社区卫生服务中心16黄昊旻本科崇明县三星镇党员服务中心三星镇社区卫生服务中心17张豪本科上海移动通信集团有限公司崇明分公司竖新镇社区卫生服务中心18陈晶晶本科崇明县壮禾农机合作社堡镇社区卫生服务中心19张婷婷本科上海理工大学堡镇社区卫生服务中心20施丹本科中央广播电视大学长兴镇社区卫生服务中心21季韦本科崇明县农联会东平镇社区事务受理服务中心22祝燕琴本科福建师范大学东平镇社区事务受理服务中心23孙佳本科上海市110应急联动中心东平镇文化体育广播电视站24施予本科上海建桥学院东平镇文化体育广播电视站更多相关信息请登录:上海事业单位考试网。
A_pioneer_of_Mars_exploration_in_China_中国火星探索的先驱
疯狂英语(新悦读)张荣桥是中国首次火星探测任务工程的总设计师,他“仰望星空,脚踏实地”,笃信“这恰恰是社会对我们每个人的需求,是我们在社会上安身立命的途径,需要我们立足当下,放眼未来”。
A pioneer of Mars exploration in China中国火星探索的先驱安徽张岚1Zhang Rongqiao,chief designer of China s first inter⁃planetary endeavor (努力)—the Tianwen 1Mars miss⁃ion —was named by the top scientific journal Nature asone of the 10people “who mattered in science ”in 2021.The annual list,published on the journal s website,said that Zhang is an engineer who led “China s first success⁃ful Mars mission,which reached the planet last year and landed a rover (漫游者)on its sur⁃face ”.2Launched in July,2020from the Wenchang Space Launch Center in Hainan Prov⁃ince,the Tianwen 1robotic probe,named after an ancient Chinese poem,traveled a total of 475million kilometers before entering Martian orbit on Feb.10,2021.3After more than three months of preparations,a landing capsule released by the probe descended through the Martian atmosphere in an extremely challenging landing process and finally touched down on the planet on May 15,making China the second country,after the United States,to have successfully conducted a landing on the sur⁃face of Mars .4On May 22,the Chinese rover Zhurong became the sixth vehicle to travel on the Mar⁃21Crazy English2022.3tian surface,following the five predecessors (前任)from the US.5Born in March,1966in Qimen County,Anhui Province,Zhang studied at local schools until he went to Xidian University in Shaanxi Province in 1982.In 1988,he re⁃ceived a bachelor s degree and was admitted as a postgraduate student by the China Acad⁃emy of Space Technology in Beijing.After graduating in 1991,Zhang started his career at the academy s Beijing Institute of Satellite Information Engineering and gradually moved up through professional ranks to eventually become the institute s head.In 2004,he was named chief engineer of the Lunar Exploration Center under the State Administration of Science,Technology and Industry for National Defense and has worked there since then.Zhang has also taken part in China s lunar exploration and high⁃resolution Earth observa⁃tion satellite programs.Reading CheckChoose the best answers according to the textDetail 1.What can we know about Zhang Rongqiao from Para.1?A.He was elected as an editor of the journal Nature .B.He contributed a lot to the development of science.C.He was regarded as the greatest engineer.D.His paper was published on Nature s website.Vocabulary 2.What does the underlined word “descended ”in Para.3probably mean?A.Took off.B.Moved forward.C.Climbed up.D.Went down.Detail 3.How many vehicles have traveled on the surface of Mars according to Para.4?A.Three. B.Four. C.Five. D.Six.Inference 4.How does the author develop the last paragraph?A.By providing examples.B.By making comments.C.By following the time order.D.By explaining the process.22疯狂英语(新悦读)Language StudyⅠ.Analyze the difficult sentence in the textAfter more than three months of preparations,a landing capsule released by the probe descended through the Martian atmosphere in an extremely challenging landing process and finally touched down on the planet on May 15,making China the second country,after the United States,to have successfully conducted a landing on the surface of Mars.经过三个多月的准备,探测器释放的着陆舱在极具挑战性的着陆过程中穿越火星大气层,最终于5月15日降落在火星上,使中国成为继美国之后成功登陆火星表面的第二个国家。
开放式高速公路收费站集约化管理模式研究——“收费站+”服务模式探索
第19卷第94期交通节能与环保Vol.19 No.2 2023年04月Transport Energy Conservation &Environmental Protection April. 2023 doi: 10.3969/j.issn.1673-6478.2023.02.024开放式高速公路收费站集约化管理模式研究⸺⸺“收费站+”服务模式探索李强1,熊丹2,裴春东1,王林1,孟庆振1(1. 泸州东南高速公路发展有限公司,四川泸州646001;2. 四川交通职业技术学院公路交通安全实验室,四川成都611130)摘要:随着国家综合立体交通网的逐步完善,高速公路运营的市场竞争日渐激烈,要谋求运营企业的长远发展,就必须夯实长效发展基础,打破现有同质化竞争藩篱,积极探索多元化发展方向,形成同业间的差异化竞争优势。
本文基于融合发展理论分析,结合高速公路收费站开放式服务与集约化管理理念,充分考虑收费站房利用率,创造性提出“收费站+”服务模式,并以泸州东南高速公路发展有限公司蓝田收费站为例,提出“收费站+驿站”服务模式探索实践,同时提出通过深挖品牌内涵、寻求多方合作、借助新媒体,孵化新网红、顺应市场需求、拓宽宣传渠道等“收费站+”实施路径,为高速公路运营企业谋求差异化竞争优势和探索多元化服务发展路径提供坚实基础。
关键词:高速公路;收费站;开放式;集约化;多元化服务中图分类号:U491 文献标识码:A 文章编号:1673-6478(2023)02-0130-06Research on Intensive Management Mode of Open Expressway T oll Station : “T ollstation +” Service Mode ExplorationLI Qiang1, XIONG Dan2 , PEI Chundong1, WANG Lin1 , MENG Qingzhen1(1. Luzhou Southeast Expressway Development CO., Ltd., Luzhou Sichuan 646001, China;2.Key Laboratory of Road Traffic Safety, Sichuan V ocational and Technical College of Communications, ChengduSichuan 611130, China)Abstract:With the gradual improvement of the national comprehensive three-dimensional transportation network, the market competition of highway operation is becoming increasingly fierce. In order to seek the long-term development of the operation enterprises, we must consolidate the long-term development foundation, break the existing homogeneous competition barriers, actively explore the diversified development direction, and form the differentiated competitive advantage between the industry. Based on the theoretical analysis of integrated development, combined with the open service and intensive management concept of expressway toll station, and fully considering the utilization rate of toll station, this paper creatively proposed the "toll station +" service mode, and took Lantian toll station of Luzhou Southeast Expressway Development Co., Ltd. as an example, proposed the "toll station +post" service mode exploration and practice. At the same time, it puts forward the implementation path of "toll station +" through deep exploration of brand connotation, seeking multi-party cooperation, using new media, incubating new Internet celebrities, adapting to market demand, broadening publicity channels, etc., to provide a solid foundation for highway operation 收稿日期:2023-03-22作者简介:李强(1979-),男,山东济南人,硕士,研究方向为公路工程等.()通信作者:熊丹(1987-),女,四川资阳人,硕士,副教授,研究方向为交通安全与应急、交通运输规划与管理.()第2期李强等,开放式高速公路收费站集约化管理模式研究⸺⸺“收费站 +”服务模式探索131 enterprises to seek differentiated competitive advantages and explore diversified service development paths.Key words: expressway; toll station; open; intensification; diversified service0引言高速公路作为综合运输体系中的骨干路网构成,正处于向现代综合服务产业的战略转型期,是助力交通强国发展的使命要求和全面建成现代化强国的重要支撑。
支持Wifi无线上网的多接口DLP智能微型投影仪[实用新型专利]
专利名称:支持Wifi无线上网的多接口DLP智能微型投影仪专利类型:实用新型专利
发明人:邢彦文,陶玉柏,陈少林,张海明,向浩
申请号:CN201320414136.8
申请日:20130711
公开号:CN203399203U
公开日:
20140115
专利内容由知识产权出版社提供
摘要:本实用新型涉及一种支持Wifi无线上网的多接口DLP智能微型投影仪,包括机壳和设置在机壳内包含有控制芯片及其外围电路,所述的外围电路包括分别与控制芯片连接的电源模块、音频输出模块、光学投影模组、存储模块、复位电路、Wifi与蓝牙模块以及数据接口模块。
与现有技术相比,本实用新型具有结构小巧、支持Wifi无线上网且带有多种数据接口,无需通过PC机即可单独使用。
申请人:上海长城计算机网络工程有限公司
地址:202156 上海市崇明县新河镇新申路921弄2号E区254室
国籍:CN
代理机构:上海科盛知识产权代理有限公司
代理人:宣慧兰
更多信息请下载全文后查看。
场所精神理论视角下的乡村公共空间设计——_以黄南村村民活动中心改造设计为例
02摘要:乡村公共空间历来是乡土文化的重要载体,是乡村文明建设之魂。
但在现今的乡村公共空间设计中缺乏了乡土文化的气息,失去了原有的文化价值。
本文以诺伯舒兹的“场所精神”理论为基础,从地域方向感、文化认同感,精神归属感三个方面,对松阳县黄南村的村民活动中心展开设计分析,总结设计方法,探讨乡村公共空间的场所精神营造,塑造看得见山水,留得住乡愁的乡村公共空间。
关键词:场所精神;乡村公共空间;乡土文化;人文精神Abstract: Rural public space has always been an important carrier of local culture and the soul of rural civilization construction. However, in today's rural public space design, it lacks the fl avor of local culture and loses the original cultural value. Based on Norbert Schutz's theory of "fi eld spirit", this paper analyzes the design of the villagers' activity center in Huangnan Village, Songyang County, from the three aspects of the sense of regional orientation, cultural identity, and spiritual belonging. It summarizes the design methods and discusses the place spirit construction of rural public space with an aim to build the rural public space that can display mountains and rivers and keep nostalgia.Key words: fi eld spirit ; rural public space ; local culture ; humanistic spirit中图分类号:TU986 文献标识码:A doi:10.3963/j.issn.2095-0705.2023.02.002收稿日期:2022-10-15作者简介:王勇(1964—),男,上海理工大学艺术设计学院教授,研究方向为环境景观规划设计;程瑞强(1999—),男,上海理工大学硕士研究生,研究方向为环境景观规划设计;张施泉(1982—),男,浙江九合建筑设计有限公司高级工程师,研究方向为环境景观规划设计。
上海弛诤科技有限公司介绍企业发展分析报告
Enterprise Development专业品质权威Analysis Report企业发展分析报告上海弛诤科技有限公司免责声明:本报告通过对该企业公开数据进行分析生成,并不完全代表我方对该企业的意见,如有错误请及时联系;本报告出于对企业发展研究目的产生,仅供参考,在任何情况下,使用本报告所引起的一切后果,我方不承担任何责任:本报告不得用于一切商业用途,如需引用或合作,请与我方联系:上海弛诤科技有限公司1企业发展分析结果1.1 企业发展指数得分企业发展指数得分上海弛诤科技有限公司综合得分说明:企业发展指数根据企业规模、企业创新、企业风险、企业活力四个维度对企业发展情况进行评价。
该企业的综合评价得分需要您得到该公司授权后,我们将协助您分析给出。
1.2 企业画像类别内容行业批发业-矿产品、建材及化工产品批发资质空产品服务术服务、技术开发、技术咨询、技术交流、技1.3 发展历程2工商2.1工商信息2.2工商变更2.3股东结构2.4主要人员2.5分支机构2.6对外投资2.7企业年报2.8股权出质2.9动产抵押2.10司法协助2.11清算2.12注销3投融资3.1融资历史3.2投资事件3.3核心团队3.4企业业务4企业信用4.1企业信用4.2行政许可-工商局4.3行政处罚-信用中国4.5税务评级4.6税务处罚4.7经营异常4.8经营异常-工商局4.9采购不良行为4.10产品抽查4.12欠税公告4.13环保处罚4.14被执行人5司法文书5.1法律诉讼(当事人)5.2法律诉讼(相关人)5.3开庭公告5.4被执行人5.5法院公告5.6破产暂无破产数据6企业资质6.1资质许可6.2人员资质6.3产品许可6.4特殊许可7知识产权7.1商标7.2专利7.3软件著作权7.4作品著作权7.5网站备案7.6应用APP7.7微信公众号8招标中标8.1政府招标8.2政府中标8.3央企招标8.4央企中标9标准9.1国家标准9.2行业标准9.3团体标准9.4地方标准10成果奖励10.1国家奖励10.2省部奖励10.3社会奖励10.4科技成果11 土地11.1大块土地出让11.2出让公告11.3土地抵押11.4地块公示11.5大企业购地11.6土地出租11.7土地结果11.8土地转让12基金12.1国家自然基金12.2国家自然基金成果12.3国家社科基金13招聘13.1招聘信息感谢阅读:感谢您耐心地阅读这份企业调查分析报告。
上海拓聚聚合物材料有限公司介绍企业发展分析报告
Enterprise Development专业品质权威Analysis Report企业发展分析报告上海拓聚聚合物材料有限公司免责声明:本报告通过对该企业公开数据进行分析生成,并不完全代表我方对该企业的意见,如有错误请及时联系;本报告出于对企业发展研究目的产生,仅供参考,在任何情况下,使用本报告所引起的一切后果,我方不承担任何责任:本报告不得用于一切商业用途,如需引用或合作,请与我方联系:上海拓聚聚合物材料有限公司1企业发展分析结果1.1 企业发展指数得分企业发展指数得分上海拓聚聚合物材料有限公司综合得分说明:企业发展指数根据企业规模、企业创新、企业风险、企业活力四个维度对企业发展情况进行评价。
该企业的综合评价得分需要您得到该公司授权后,我们将协助您分析给出。
1.2 企业画像类别内容行业科技推广和应用服务业-技术推广服务资质增值税一般纳税人产品服务领域内的技术开发、技术转让、技术服务、技1.3 发展历程2工商2.1工商信息2.2工商变更2.3股东结构2.4主要人员2.5分支机构2.6对外投资2.7企业年报2.8股权出质2.9动产抵押2.10司法协助2.11清算2.12注销3投融资3.1融资历史3.2投资事件3.3核心团队3.4企业业务4企业信用4.1企业信用4.2行政许可-工商局4.3行政处罚-信用中国4.4行政处罚-工商局4.5税务评级4.6税务处罚4.7经营异常4.8经营异常-工商局4.9采购不良行为4.10产品抽查4.11产品抽查-工商局4.12欠税公告4.13环保处罚4.14被执行人5司法文书5.1法律诉讼(当事人)5.2法律诉讼(相关人)5.3开庭公告5.4被执行人5.5法院公告5.6破产暂无破产数据6企业资质6.1资质许可6.2人员资质6.3产品许可6.4特殊许可7知识产权7.1商标7.2专利7.3软件著作权7.4作品著作权7.5网站备案7.6应用APP7.7微信公众号8招标中标8.1政府招标8.2政府中标8.3央企招标8.4央企中标9标准9.1国家标准9.2行业标准9.3团体标准9.4地方标准10成果奖励10.1国家奖励10.2省部奖励10.3社会奖励10.4科技成果11土地11.1大块土地出让11.2出让公告11.3土地抵押11.4地块公示11.5大企业购地11.6土地出租11.7土地结果11.8土地转让12基金12.1国家自然基金12.2国家自然基金成果12.3国家社科基金13招聘13.1招聘信息感谢阅读:感谢您耐心地阅读这份企业调查分析报告。
上海宽腾电子科技有限公司介绍企业发展分析报告
Enterprise Development专业品质权威Analysis Report企业发展分析报告上海宽腾电子科技有限公司免责声明:本报告通过对该企业公开数据进行分析生成,并不完全代表我方对该企业的意见,如有错误请及时联系;本报告出于对企业发展研究目的产生,仅供参考,在任何情况下,使用本报告所引起的一切后果,我方不承担任何责任:本报告不得用于一切商业用途,如需引用或合作,请与我方联系:上海宽腾电子科技有限公司1企业发展分析结果1.1 企业发展指数得分企业发展指数得分上海宽腾电子科技有限公司综合得分说明:企业发展指数根据企业规模、企业创新、企业风险、企业活力四个维度对企业发展情况进行评价。
该企业的综合评价得分需要您得到该公司授权后,我们将协助您分析给出。
1.2 企业画像类别内容行业科技推广和应用服务业-其他科技推广服务业资质增值税一般纳税人产品服务算机科技、网络科技技术领域内的技术开发、1.3 发展历程2工商2.1工商信息2.2工商变更2.3股东结构2.4主要人员2.5分支机构2.6对外投资2.7企业年报2.8股权出质2.9动产抵押2.10司法协助2.11清算2.12注销3投融资3.1融资历史3.2投资事件3.3核心团队3.4企业业务4企业信用4.1企业信用4.2行政许可-工商局4.3行政处罚-信用中国4.4行政处罚-工商局4.5税务评级4.6税务处罚4.7经营异常4.8经营异常-工商局4.9采购不良行为4.10产品抽查4.11产品抽查-工商局4.12欠税公告4.13环保处罚4.14被执行人5司法文书5.1法律诉讼(当事人)5.2法律诉讼(相关人)5.3开庭公告5.4被执行人5.5法院公告5.6破产暂无破产数据6企业资质6.1资质许可6.2人员资质6.3产品许可6.4特殊许可7知识产权7.1商标7.2专利7.3软件著作权7.4作品著作权7.5网站备案7.6应用APP7.7微信公众号8招标中标8.1政府招标8.2政府中标8.3央企招标8.4央企中标9标准9.1国家标准9.2行业标准9.3团体标准9.4地方标准10成果奖励10.1国家奖励10.2省部奖励10.3社会奖励10.4科技成果11土地11.1大块土地出让11.2出让公告11.3土地抵押11.4地块公示11.5大企业购地11.6土地出租11.7土地结果11.8土地转让12基金12.1国家自然基金12.2国家自然基金成果12.3国家社科基金13招聘13.1招聘信息感谢阅读:感谢您耐心地阅读这份企业调查分析报告。
一种230M无线专网信道用电信息采集系统的安全通信方法[发明专利]
专利名称:一种230M无线专网信道用电信息采集系统的安全通信方法
专利类型:发明专利
发明人:郑庆荣,陈湘瑜,赵建立,李力
申请号:CN201310684998.7
申请日:20131213
公开号:CN103795541A
公开日:
20140514
专利内容由知识产权出版社提供
摘要:本发明涉及一种230M无线专网信道用电信息采集系统的安全通信方法,该方法将公开密钥算法用于点对点通信的身份认证和随机会话密钥的建立,以及广播通信的身份认证,将对称密钥算法用于点对点通信身份认证后的通信报文的身份验签,用散列函数对通信报文进行摘要,将摘要加密后随报文一起发送给对方用于身份验签认证,在报文中加上一个命令认证标志,并一起参与摘要,以抗重放攻击。
解决了230M无线专网信道用电信息采集系统在通信过程中可能发生的入侵者假冒主站发送控制或参数变更命令,以及截获主站发送的命令而进行重放攻击造成通信安全风险的问题。
申请人:国网上海市电力公司,上海协同科技股份有限公司
地址:200122 上海市浦东新区源深路1122号
国籍:CN
代理机构:上海三和万国知识产权代理事务所(普通合伙)
代理人:蔡海淳
更多信息请下载全文后查看。
企业信用报告_上海阔杉贸易有限公司
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Pros
Self resource management
Mature computing model
Internal fault tolerance, splits, UI …
2.0.3-Alpha
Different computing model How to do iterative coordination?
ACCUMULATE GRADIENTS UPDATE WEIGHTS
1st iteration
WEIGHTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Master
Guagua: An Iterative Computing Framework on Hadoop
Zhang Pengshan(David), PayPal
AGENDA
• Introduction • Distributed Neural Network Algorithm
• What is Guagua? • Guagua Advanced Features • Shifu on Guagua • Future Plans
• No distributed logistic regression & neural network. • Iterative through Hadoop jobs, bad performance. • No independent Spark cluster. • Hadoop cluster is still 1.0 based, not YARN.
Thousands of Features Algorithms (LR, NN, DT) Big Training Data SLA (Online) Simulation
RISK MODELING IN PAYPAL
MODELING CHALLENGES
Thousands of Features Algorithms (LR, NN, DT) Big Training Data SLA (Online) Simulation
DISTRIBUTED NEURAL NETWORK ALGORITHM*
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Master
WEIGHTS: DOUBLE [] WEIGHTS: DOUBLE []
REGISTER
Worker: Mapper (Container)
1. Master is listening znodes of workers. 2. Workers are listening znode of master.
GUAGUA RUNTIME
Worker: Mapper (Container)
…
DISTRIBUTED NEURAL NETWORK ALGORITHM
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Master
WEIGHTS: DOUBLE [] WEIGHTS: DOUBLE []
AGENDA
• Introduction • Distributed Neural Network Algorithm
• What is Guagua? • Guagua Advanced Features • Shifu on Guagua • Future Plans
ALIPAY vs. PAYPAL
Worker: Mapper (Container)
Worker: MappContainer)
Worker: Mapper (Container)
GUAGUA RUNTIME
Worker: Mapper (Container)
REGISTER
Credit Cards
INR/SNAD
INR: SNAD: Item Not Received Significantly Not as Described
RISK CONTROL IN PAYPAL
Models
Rules
Agents
RISK MODELING IN PAYPAL
MODELING CHALLENGES
ACCUMULATE GRADIENTS UPDATE WEIGHTS
1st iteration
WEIGHTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Worker
GRADIENTS: DOUBLE []
Master
(For Hadoop 1.0)
YARN Adapter
(For Hadoop 2.0)
Consistent Client
Distributed Neural Network Application
PLUGGABLE, SCALABLE INTERCEPTORS
Master
Fault Tolerance Interceptor
Cons
PayPal Clusters: Hadoop 0.20.2
Extra fault tolerance, splits, UI …
AGENDA
• Introduction • Distributed Neural Network Algorithm
• What is Guagua? • Guagua Advanced Features • Shifu on Guagua • Future Plans
Master Master Master Master
…
Master
Worker
Worker
Worker
Worker
…
…
Worker
Worker
Worker
Worker
Worker
Worker
Worker
Worker
Worker
Worker
…
… …
…
Worker
Worker
Worker
Worker
Worker
Worker
Fault Tolerance Interceptor
ZooKeeper Coordinator
ZooKeeper Coordinator
Perf Interceptor
Perf Interceptor
Timer
Timer
User Defined Interceptors
User Defined Interceptors
…
GUAGUA API
MasterComputable
WorkerComputable
GUAGUA OVERVIEW
CORE
MasterWorkers core Fault Tolerance
Coordination
Iterative Computing Framework
MapReduce Adapter
Q: How to train models with TB data and thousands of features?
AGENDA
• Introduction • Distributed Neural Network Algorithm
• What is Guagua? • Guagua Advanced Features • Shifu on Guagua • Future Plans
Master Computation
Worker Computation
* These two graphs are aspects for each iteration.
GUAGUA RUNTIME
Master: Mapper (Container)
Worker: Mapper (Container)
Q: Where is risk control in PayPal?
A: Risk control is everywhere in .
FRAUD TYPES IN PAYPAL
Account Take Over
Fraud Types in PayPal
Stolen Financials
Worker
Worker
Worker
Worker
Worker
Worker
1
2
3
4
n
FAULT TOLERANCE
Master Master Worker Worker Worker Worker
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…
Worker
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Worker
Worker
Worker
ITERATIVE COMPUTING MODEL IN GUAGUA
Worker
WORKER RESULT
Worker
WORKER RESULT
Worker
WORKER RESULT
Master
MASTER RESULT MASTER RESULT MASTER RESULT
1st iteration
AGENDA
• Introduction • Distributed Neural Network Algorithm