GoldenGate 简介

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白金汉宫（伦敦）

⽩⾦汉宫（伦敦）⽩⾦汉宫伦敦⽩⾦汉宫（伦敦）杨虹2018-11-06阅读 235关注⽩⾦汉宫位于伦敦西敏市，是英国君王在伦敦的办公室和寝室，也是接待重要贵宾，庆祝典礼的主要场所。

1703年，⽩⾦汉公爵在这⾥造了⼀个“Town Hall”的建筑，1761年乔治三世购买了这个建筑并化了75年的时间打造成今天的模样。

1837年维多利亚⼥王把这⾥作为⾃⼰的寝宫，成为住在这⾥的第⼀个君王。

⽩⾦汉宫位于伦敦西敏市是英国君王在伦敦的办公室和寝室也是接待重要贵宾庆祝典礼的主要场所年⽩⾦汉公爵在这⾥造了⼀个的建筑年乔治三世购买了这个建筑并化了年的时间打造成今天的模样年维多利亚⼥王把这⾥作为⾃⼰的寝宫成为住在这⾥的第⼀个君王2017年2⽉，我和⼤学同学陈敬伟结伴去了英伦⼆岛，途中认识了旅友盼盼和兰兰，我们⼀起去⾃由⾏了那天，照⽚摄于伦敦桥。

我们现在已经是很好的微友了。

旅游爱好让我们有很多共同语⾔，在以后的⽇⼦⾥相信会有很多机会的。

年⽉我和⼤学同学陈敬伟结伴去了英伦⼆岛途中认识了旅友盼盼和兰兰我们⼀起去⾃由⾏了那天照⽚摄于伦敦桥我们现在已经是很好的微友了旅游爱好让我们有很多共同语⾔在以后的⽇⼦⾥相信会有很多机会的⽩⾦汉宫的⼤门，上⾯雕有⼀个狮⼦，⼀匹马和⼀只⽼虎。

这扇门⾥蕴藏着太多的历史故事，这⾥就不详述了。

⽩⾦汉宫是和故宫、凡尔赛宫、⽩宫和克⾥姆林宫并称为世界五⼤宫殿。

⽩⾦汉宫的⼤门上⾯雕有⼀个狮⼦⼀匹马和⼀只⽼虎这扇门⾥蕴藏着太多的历史故事这⾥就不详述了⽩⾦汉宫是和故宫凡尔赛宫⽩宫和克⾥姆林宫并称为世界五⼤宫殿⽩⾦汉宫⼤门前的雕塑。

⽩⾦汉宫⼤门前的雕塑⾦⾊的胜利⼥神雕像在雕塑的顶部。

⾦⾊的胜利⼥神雕像在雕塑的顶部维多利亚⼥王安详地坐着。

维多利亚⼥王安详地坐着⽩⾦汉宫的⼀个重要看点是每天11：30AM 是皇家卫队换岗的时间，⼠兵们⾝着红⾊的传统军队服，，隆重古⽼的仪式吸引游⼈观赏。

⽩⾦汉宫的⼀个重要看点是每天是皇家卫队换岗的时间⼠兵们⾝着红⾊的传统军队服隆重古⽼的仪式吸引游⼈观赏整齐度⽐中国卫兵差多了。

GoldenGate oracle

GoldenGate原理及体系结构
Parameters, Process Groups and GGSCI
• extract 和replicat是以进程组出线的，server collector默认情况下是自动生成的 • 一个进程组由如下几部分组成，并由GoldenGate系统中唯一的group name所标识，由用户指定： 1. An extract or Replicat process 2. 相应的参数文件（ASCII file，由用户生成，编辑，维护，控制相应的进程的行为，功能） 3. 相应的checkpoint文件 4. 其他相应的文件（如trail） • Process的添加，启动等，都是由GoldenGate Software Command Interface(GGSCI)完成，GGSCI还可以添加trail，察看process状态等。
GoldenGate原理及体系结构
• 了解capture和delivery模块概念后，可以进一步了解GG的使用平台：
GoldenGate原理及体系结构
• GoldenGate两种主要用法： 1. 主要用于change data capture and delivery from database transaction logs (online) 2. Initial load directly from database tables.(special run, batch)只执行一次
GoldenGate原理及体系结构
Checkpoint
GoldenGate原理及体系结构
Checkpoint（续）
Capture, Pump and Delivery save positions to a checkpoint file so they can recover in case of failure. 作用：保存相应进程当前的读取和写入的位置信息，防止进程因某些原因重启后的重复读取或数据丢失

金门大桥（GoldenGateBridge）

金门大桥（Golden Gate Bridge）金门大桥jīn dà qiáo] [stud.本词条介绍的是金门大桥 (美国世界著名桥梁), 更多含义, 请参阅"金门大桥 (多义词)".金门大桥是世界著名的桥梁之一, 是近代桥梁工程的一项奇迹.大桥雄峙于美国加利福尼亚州宽1900多米的金门海峡之上, 历时4年和10万多吨钢材, 耗资达3550万美元建成, 由史特劳斯设计.因其历史价值, 于2007年由英、美两国合拍成同名纪录片.目录1简介2建筑参数3建设历史落成时间 3.13.2 落成七十周年曾保持的记录 3.34建筑特点5建筑美学6自杀7维护工作8交通环境航空 8.11简介金门大桥是世界著名大桥之一, 被誉为近代桥梁工程的一项奇迹, 也被认为是旧金山的象征.金门大桥及旧金山夜景金门大桥的设计者是工程师史特劳斯, 人们把他的铜像安放在桥畔, 用以纪念他对美国作出的贡献.大桥雄峙于美国加利福尼亚州宽1900多米的金门海峡之上.金门海峡为旧金山海湾入口处, 两岸陡峻, 航道水深, 为1579年英国探险家弗朗西斯·德雷克发现, 并由他命名.金门大桥的北端连接北加利福尼亚, 南端连接旧金山半岛.当船只驶进旧金山, 从甲板上举目远望, 首先映入眼帘的就是大桥的巨形钢塔.钢塔耸立在大桥南北两侧, 高342米, 其中高出水面部分为227米, 相当于一座70层高的建筑物.塔的顶端用两根直径各为92.7厘米、重2.45万吨的钢缆相连,钢缆中点下垂, 几乎接近桥身, 钢缆和桥身之间用一根根细钢绳连接起来.钢缆两端伸延到岸上锚定于岩石中.大桥桥体凭借桥两侧两根钢缆所产生的巨大拉力高悬在半空之中.钢塔之间的大桥跨度达1280米, 为世界所建大桥中罕见的单孔长跨距大吊桥之一.从海面到桥中心部的高度约60米, 又宽又高, 所以即使涨潮时, 大型船只也能畅通无阻.金门大桥包括从钢塔两端延伸出去的部分 [1], 全长达2737米, 为此, 又分别在两侧修建了两座辅助钢塔使桥形更加壮观.大桥的桥面宽27.4米有6条车行道和两条宽敞的人行道.大桥的设计者是工程师约瑟夫·斯特劳斯人们为纪念他对美国作出的贡献,,,, 把他的全身铜像安放在桥畔.铜像形象生动, 神情自若.金门大桥于1933年动工, 1937年5月竣工, 用了4年时间和10万多吨钢材, 耗资达3550万美元.整个大桥造型宏伟壮观、朴素无华.桥身呈朱红色, 横卧于碧海白浪之上, 华灯初放, 如巨龙凌空, 使旧金山市的夜空景色更加壮丽.2建筑参数【中文名称】: 金门大桥【英文名称】: golden gate bridge【建筑位置】: 美国加利福尼亚州旧金山与马林县之间【跨越】: 金门海峡【开工日期】: 1933年1月5日【竣工日期】: 1937年4月完工, 同年5月27日对外开放【最长跨距】: 1280米【总长度】: 2737米【桥面宽度】: 27米【桥塔高度】: 342米【最大高度】: 227米【路面净空】: 在收费站为4.3米【桥下净空】: 67米至平均高水位【年平均日交通流量】: 100000【过桥费用】: $were kla at 0600 (往南向旧金山方向单向收费) 使用电子收费fastrak为 $5.00【结构形式】: 悬索桥与钢桁架拱桥【建筑造价】: 3550万美元【设计者】: 约瑟夫·斯特劳斯 (joseph strauss), 艾尔文·莫罗(irving morrow), 查尔斯·埃里斯 (charles alton ellis (leon), 里昂·莫伊塞弗 moisseiff)【金门大桥卫星图像投资单位】: 加州政府【维护单位】: 金门大桥管理局【地理坐标】: 37°49′11″n 122°28′43″w3建设历史1579年英国探险家francisdrake发现了连结太平洋和旧金山的一个海峡, 这就是后来的金门.尽管这个名字在1849年的淘金潮以前早就使用, 但淘金潮使得金门 (成了加利福尼亚神秘魅力不可缺少的一部分进入北california的入口).As early as 1872, the idea of building a bridge across the Strait of Kinmen was discussed, but it was not until 1937 that a suspension bridge was built on the channel. Golden Gate Bridge spans the north and south, linking San Francisco with the Marin county. The bridge, which has been built for more than four years, is one of the most beautiful structures in the world. It is no longer the longest suspension bridge in the world, but it is the most famous one. The huge tower of Golden Gate Bridge is 227 meters high, each steelCord weight 6412 metric tons, twisted by 27000 steel wires. Founded in January 1933, it was first opened to traffic in May 1937.The original idea of Golden Gate Bridge came from Joseph Strauss, a bridge engineer. Strauss had previously designed more than 400 small inland bridges. He spent more than 10 years lobbying residents in northern California. Other major designers of the bridge include Erwin Moro, who decided on their artistic shapes and colors, and Charles Ellis, an engineer who works withcomplex mathematical calculations, and Leon Moisef, a bridge designer.The bridge began construction in January 5, 1933 and was completed in April 1937. It was opened to pedestrians in May 27th of that year. Strauss placed a brick from his alma mater, Ohio, University of Cincinnati, before pouring concrete into the South pier. The next day, with President Roosevelt in Washington press a button, the bridge was officially open to the car.Voters in San Francisco have issued their initial $35 million in construction bonds, backed by their homes, farms and companies. In 1977, the last bond was paid off, of which $35 million in principal and $39 million in interest came from income from bridge charges.Completion timeGolden Gate Bridge commenced construction in 1933 and completed in May 1937. It took 4 years and more than 100 thousand tons of steel, costing us $35 million 500 thousand. The whole bridge is magnificent, simple style. The bridge was red, lying above the blue sea whitecaps, with all the lights on, such as the air, make the sky more magnificent scenery in San Francisco city. However, due to the rain, the tower will be rusty, painter can only brush the paint on the day in and day out.Completion of 70th anniversaryLandmark Golden Gate Bridge in San Francisco, USA, celebratedits birthday in May 27, 2007 at the age of seventy". An official report released the day before the Golden Gate Bridge District, to the bridge before a major engineer named Ellis should honor. Not until last week did he have his name in the book of merit in Golden Gate Bridge.Strauss, the chief engineer of the bridge, has long been named the father of Golden Gate Bridge and enjoys the honor of one of the greatest engineers of the twentieth Century. KinmenGolden Gate Bridge in the fogThere is a statue at the end of the bridge, which was set up to commemorate him after his death in 1938.But an important mathematical design of Golden Gate Bridge and thousands of pen bridges are needed to calculate, in 24 published in the book "Golden Gate Bridge: report of 2 chief engineer, is called iris by the engineer. Ellis was fired before the start of Golden Gate Bridge, and Strauss took all the credit. Ellis returned to college to teach and died in 1949.Seventy years later, the hero of the bridge was given a belated affirmation. The mysterious legend does not affect one hundred thousand commuters every day, across bridges, between San Francisco and the North peninsula. The image of Golden Gate Bridge has become the best endorsement in San Francisco, according to statistics, about one million tourists come here every month. There are two hundred people waiting on Golden Gate Bridge, including toll collection, maintenance and painting, wire rope and so on. Golden Gate Bridge is not the color red,but red, yellow and black mixture of "international orange", the painter should be painted in the mobile scaffolding, with pressure cleaning, and then on the three layer of paint, another colleague tied to the cables attached to the web, do paint inspection work. Golden Gate Bridge has beauty and problems. Famous Golden Gate Bridge in heavy fog, but fog and rain is the biggest enemy of steel structure, serious rust, all five hundred sub time suspension cables are updated. Seventy years, there are three times because the wind is too large, "wind" lock bridge.Records that have been keptBefore 1957, Golden Gate Bridge was the longest suspension bridge in the world, and the two piers had the longest span of suspension bridges in the world by 1964. The two 342 meters high tower until the Akashi kaikyo bridge or before the completion of the world's tallest tower of suspension bridge.4 architectural featuresGolden Gate Bridge bridge international orange color, because the architect Erwin Moro think this color is and the surrounding environment, and can make the Golden Gate Bridge in common fog appears more eye-catching. Due to its unique structure and unique appearance, it has been widely regarded as a model of beauty by the international bridge engineering community, and has been recognized as one of the modern wonders of the world by the American Society of building engineers. It is also one of the world's most photogenic bridge.Golden Gate Bridge maintenance work,To the continuous paint is one of the contents.Golden Gate Bridge maintenance work also includes strengthening work continuously, the occurrence of Loma Prieta earthquake at the end of 1989, the vulnerability of Golden Gate Bridge experts hired a detailed assessment of the authorities, and to develop a reinforcement plan, the implementation of three projects, second projects have been completed in 2006 in reinforcement.Suicide netGolden Gate Bridge is not the longest suspension bridge in the world, but the Golden Gate Bridge because of its magnificent magnificent shape and has been known to the world. But another reason for the bridge's fame is the name of its "suicide Mecca". According to statistics, since the bridge has been completed, a total of more than 1200 people from the bridge and jumped, farewellGolden Gate BridgeIn the world.Since the distance between the bridge and the sea is 60 meters long, and with the great impact of falling people, the suicide has no possibility of survival. Last year alone, 39 people jumped here, killing 19 people in 2008. The high number of suicides has caused a headache for the related departments inSan Francisco. In fact, as early as 1970s, it was suggested that special facilities should be installed on the bridge to stop people from jumping bridges. The local bridge administration voted in October 10, 2008 to install a stainless steel mesh across the bridge, so that the entire bridge would be "net" and the suicide would not fall directly into the sea.The project costs about $4 million to $5 million. The local environmental protection department will conduct a further review of the project to ensure that it does not damage the environment and does not affect the beauty of the Golden Gate Bridge. Although the original intention of the fence was good, the plan still raised some objections. Critics point out, and on the bridge to splurge, rather than use the money to help people overcome mental illness to commit suicide, improve their mental health level, in order to fundamentally solve the problem. [2]5 architectural aestheticsGolden Gate Bridge bridge international orange color, because the architect Erwin Moro think this color is and the surrounding environment, and can make the bridgeGolden Gate Bridge oneThe fog is more striking in the Golden Gate strait. Due to its unique structure and unique appearance, it is widely regarded as a model of beauty by the international bridge engineering community, and is one of the modern wonders of the world by the American Society of building engineers. It is also one of theworld's most photogenic bridge.Golden Gate Bridge bridge maintenance work, to continue to paint is one of the contents. Beginning in May 2011 for the first time the whole repainted, still use international orange. The project is expected to take four years to complete. This is the Golden Gate Bridge opened for the first time repainting in recent 75 years.Golden Gate Bridge maintenance work also includes strengthening work continuously, the occurrence of Loma Prieta earthquake at the end of 1989, the vulnerability of Golden Gate Bridge experts hired a detailed assessment of the authorities, and to develop a reinforcement plan, the implementation of three projects, second projects have been completed in 2006 in reinforcement. [3]6 suicideGolden Gate Bridge is one of the most famous suicide sites in the world, and there are no official statistics when the number of suicides in Golden Gate Bridge reached 1000 in 1993. It is estimated that in 2008 it has reached more than 1300 people. In the 5 years prior to 2005, one person on average jumped off the bridge every two weeks. After jumping for 4 seconds from the 67 meter high bridge deck, the suicide would land at 120 kilometers per hour. As of 2003, a total of 26 attempted suicide. In March 11, 2005, Golden Gate Bridge management decided to invest $2 million to study the feasibility of installing guardrail. But because of the recession, the plan has been delayed. [3]7 maintenance workGolden Gate Bridge maintenance, including toll collection, maintenance and painting, wire rope, etc.. Which paint is one of continuous bridgegolden gate bridgeItem content. The painter must paint in the mobile scaffolding, with pressure cleaning, and then on the three layer of paint, another colleague tied to the cables attached to the web, do paint inspection work.Golden Gate Bridge maintenance work also includes strengthening work continuously, the occurrence of Loma Prieta earthquake at the end of 1989, the vulnerability of Golden Gate Bridge were evaluated in detail, and the development of the reinforcement plan, the implementation of three projects, second projects have been completed in 2006 in reinforcement.Golden Gate Bridge has beauty and problems. Famous Golden Gate Bridge in heavy fog, but fog and rain is the biggest enemy of steel structure, serious rust, all five hundred sub time suspension cables are updated. Seventy years, there are three times because the wind is too large, "wind" lock bridge.8 Traffic EnvironmentaviationAlmost all major cities in the world have flights to San Francisco, and the air traffic is comparatively convenient. The price of the ticket can be decided by the date of purchase. It is the most expensive to buy in advance, and the ticket price is the most expensive on that day.RailwayIn the United States, there are many railway lines leading to San Francisco,And American Railroads offer discountsGolden Gate Bridge at nightThe packages are available, this package can be used without limit within the prescribed period of time and place, are divided into general, general, east west line and West Coast general general. On the way to the United States since March for tourists to buy such a package in the United States domestic travel is more cost-effective. This package can be handled in the United States before the passport with the purchase. The package is the difference in the tourist season and theoff-season.HighwayIn the United States, highway traffic is very developed, the annual June to October there will be New York, San Francisco to Boston round-trip travel bus, take the tour bus in 14 days across the continent, about 5000 km trip, passengers can ridein the United States within the scope of the company within a certain period of time the coach (students and over 62 years old can enjoy discount), which is unique to America on a tour bus tour traffic throughout the United states. [4]。

金门大桥(英文：Golden Gate Bridge

建设时期
钢塔之间的大桥跨度达1280米，为世界所建大桥中罕见的单孔长跨距大吊桥之一。从海面到桥中心部的高度约60米，又宽又高，所以即使涨潮时，大型船只也能畅通无阻
金门大桥于1933年动工，1937年5月竣工，用了4年时间和 10万多吨钢材，耗资达3550万美元。整个大桥造型宏伟壮观、朴素无华。桥身呈朱红色，横卧于碧海白浪之上，华灯初放，如巨龙凌空，使旧金山市的夜空景色更加壮丽。
主跨：4200英尺 1280米
每根钢筋长度：7560英尺 2331米钢筋直径：36.38英寸，0.924米
每根主缆含有钢筋数：27572
钢丝总长：128748米
每根钢缆重:2450 TON/22226 MTON
一八六九年，美国“皇帝”诺顿一世下令在旧金山海湾建一座悬索桥，此后又几次下诏命令建桥.和他的其他圣旨不同的是,这道圣旨最终不仅被奉行,并且归功于他,只不过迟了六十多年，一九三三年,旧金山开始在诺顿一世规划的地址建悬索桥，一九三六年，这座世界上最著名的大桥之——金门大桥建成，在它的一根桥梁上挂牌纪念诺顿一世"旅行者，请停步并感谢美国皇帝和墨西哥保护者诺顿一世(一八五九至一八八零在位)他有先见之明，构想并下令在旧金山海湾建桥"。
制作：道桥五班聊金宇 20162406
这项工程的造价约为400万到500万美元。当地的环保部门还要对工程进行进一步审查，确保其不会对环境造成破坏，也不会影响到金门大桥的美观。虽然给大桥围网的初衷是好的，但此计划还是招致了一些异议。批评人士指出，与其在大桥上一掷千金，还不如用这笔钱来帮助自寻短见者战胜心理疾病，提高他们的心理健康水平，这样才能从根本上解决问题。
由于桥面到海面的距离长达60米，再辅以人坠落时巨大的冲击力，自杀者基本上没有生存的可能性。仅2009年一年就有39人在这里跳桥身亡，2008年的自杀人数则为19人。居高不下的自杀人数使旧金山相关部门头痛不已。其实早在20世纪70年代，就有人提议在大桥上装上特定设施以阻止人们跳桥。当地桥梁管理部门于2008年10月10日投票决定在大桥上安装不锈钢网，这样整座大桥都会被网“兜” 起来，自杀者就不会直接坠落到海面了。

goldengate原理

goldengate原理（原创版）目录1.GoldenGate 原理简介2.GoldenGate 的工作原理3.GoldenGate 的优缺点4.GoldenGate 的应用场景正文一、GoldenGate 原理简介GoldenGate（简称 GG）是一种数据库复制技术，主要用于实现实时数据流复制。

它通过将数据从源数据库传输到目标数据库，使得目标数据库与源数据库保持一致，从而实现数据的实时同步。

GG 原理适用于需要保证数据实时同步的场景，例如数据仓库、数据迁移等。

二、GoldenGate 的工作原理1.数据捕捉：GG 在源数据库中设置捕捉器（Trap），用于监听源数据库中的数据变更操作，如插入、更新和删除等。

2.数据转换：捕捉器将捕获到的数据变更操作转换为 GG 可以识别的格式，即日志事件（Logical Event）。

3.数据传输：GG 将日志事件通过网络传输到目标数据库。

4.数据应用：目标数据库接收到日志事件后，根据事件类型进行相应的数据处理操作，如插入、更新和删除等，从而保持与源数据库的数据一致性。

三、GoldenGate 的优缺点1.优点：（1）实时性：GG 可以实现数据的实时同步，使得目标数据库与源数据库的数据几乎同时变更。

（2）稳定性：GG 采用日志事件传输，即使在网络传输过程中出现丢失或重复数据，也不会影响数据一致性。

（3）可扩展性：GG 支持多个目标数据库，可以实现一对多、多对多的数据复制。

2.缺点：（1）资源消耗：GG 需要额外的硬件资源来部署捕捉器和处理日志事件，可能会对源数据库性能产生影响。

（2）数据冗余：GG 会将源数据库的数据变更同步到目标数据库，导致目标数据库存在冗余数据。

四、GoldenGate 的应用场景1.数据仓库：GG 可以实时地将操作型数据库的数据变更同步到数据仓库，保证数据仓库的数据实时性。

2.数据迁移：GG 可以在源数据库和目标数据库之间实现实时数据迁移，便于数据整合和迁移。

GoldenGate培训教程

Capture
Source Trail
网络
Target Trail
Deliver
源数据库
Target Trail
Deliver
Source Trail
Capture
目的数据库
双向复制
逻辑数据复制的几个重要问题（一）
数据变化来源读取在线日志或归档日志在信息不足时与数据库交互
- 数据字典信息 - 查询日志不足信息，例如大对象
单向复制报表、灾备双向复制立即接管点对点负载均衡, 高可用性及容灾
广播复制数据分发
集中复制数据仓库
多级复制层次化企业数据
Data Pumps 与一对多复制
Database Transaction Logs
Extract Proces s Extract Proces s Extract Proces s Extract Proces s
For Record: (‘a’,’a’,’a’,’a’) Update tcustmer set name=‘b’; Oracle附加日志会记录cust_code列的值’a’到日志中；目标端根据cust_code=‘a’构筑update 的 sql语句；如果两端主键变为city，而没有重新添加附加日志，则目标端会根据自己的主键city建立附加日志，此时日志中没有该字段值，导致目标update失败如果修改表但没有修改主键，则附加日志不受影响
逻辑数据复制的几个问题（四）
如何将数据装载到目标库？常规加载
- 通过SQL装载

直接加载
通过数据块装载不利用空闲存储空间不检查外键等约束装载速度较快

GoldenGate采用常规加载

金门大桥 Golden Gate Bridge

金门大桥Golden Gate Bridge（旧金山）The orange towers of the Golden Gate Bridge-probably the most beautiful, certainly the most photographed bridge in the world-are visible from almost every point of elevation in San Francisco. The only cleft in Northern California's 600-mile continental wall, for years this mile-wide strait was considered unbridgeable. As much an architectural as an engineering feat, the Golden Gate took only 52 months to design and build, and was opened in 1937. Designed by Joseph Strauss, it was the first really massive suspension bridge, with a span of 4200ft, and until 1959 ranked as the world's longest. It connects the city at its northwesterly point on the peninsula to Marin County and Northern California, rendering the hitherto essential ferry crossing redundant, and was designed to withstand winds of up to a hundred miles an hour and to swing as much as 27ft. Handsome on a clear day, the bridge takes on an eerie quality when the thick white fogs pour in and hide it almost completely.Y ou can either drive or walk across. The drive is the more thrilling of the two options as you race under the bridge's towers, but the half-hour walk across it really gives you time to take in its enormous size and absorb the views of the city behind you and the headlands of Northern California straight ahead. Pause at the midway point and consider the seven or so suicides a month who choose this spot, 260ft up, as their jumping-off spot. Monitors of such events speculate that victims always face the city before they leap. In 1995, when the suicide toll from the bridge had reached almost 1000, police kept the figures quiet to avoid a rush of would-be suicides going for the dubious distinction of being the thousandth person to leap.Perhaps the best-loved symbol of San Francisco, in 1987 the Golden Gate proved an auspicious place for a sunrise party when crowds gathered to celebrate its fiftieth anniversary. Some quarter of a million people turned up (a third of the city's entire population); the winds were strong and the huge numbers caused the bridge to buckle, but fortunately not to break.泰姬陵泰姬陵Taj Mahal介绍英文版The construction of this marble masterpiece is credited to the Mughal emperor Shah Jahan who erected this mausoleum in memory of his beloved wife，Arjumarid Bano Begum；popularly known as Mumtaz Mahal，who died in A.H. 1040 （A.D. 1630）。

GoldenGate产品介绍和案例

Oracle GoldenGate 产品介绍一、Oracle GoldenGate技术原理Oracle GoldenGate软件是一种基于log(日志)的结构化数据复制软件，它通过解析源数据库在线log或归档log获得数据的增、删、改变化，再将这些变化应用到目标数据库，实现源数据库与目标数据库同步、双活。

Oracle GoldenGate 软件可以在异构的IT基础结构（包括几乎所有常用操作系统平台和数据库平台）之间实现大量数据亚秒级的实时复制，其复制过程简图如下：如上图所示，Oracle GoldenGate的数据复制过程如下：利用捕捉进程(Capture Process)在源系统端读取Online Redo Log或Archive Log，然后进行解析，只提取其中数据的变化如增、删、改操作，并将相关信息转换为Oracle GoldenGate自定义的中间格式存放在队列文件中。

再利用传送进程将队列文件通过TCP/IP传送到目标系统。

捕捉进程在每次读完log中的数据变化并在数据传送到目标系统后，会写检查点，记录当前完成捕捉的log位置，检查点的存在可以使捕捉进程在中止并恢复后可从检查点位置继续复制；目标系统接受数据变化并缓存到Oracle GoldenGate队列当中，队列为一系列临时存储数据变化的文件，等待投递进程读取数据。

队列数据量一般只有log的四分之一左右；Oracle GoldenGate投递进程从队列中读取数据变化并创建对应的SQL 语句，通过数据库的本地接口执行，提交到数据库成功后更新自己的检查点，记录已经完成复制的位置，数据的复制过程最终完成。

由此可见，Oracle GoldenGate是一种基于软件的数据复制方式，它从数据库的log解析数据的变化。

Oracle GoldenGate将数据变化转化为自己的格式，直接通过TCP/IP网络传输，无需依赖于数据库自身的传递方式，而且可以通过高达9:1的压缩率对数据进行压缩，可以大大降低带宽需求。

GoldenGate概念和机制

GoldenGate概念和机制1. OGG有哪些进程ü Manger : manger进程是goldengate的控制进程，分别运⾏在源端和⽬标端上，它主要的作⽤是启动、监控、重启goldengate的其他进程，报告错误及事件，分配数据存储空间，发布阀值报告等。

需要注意的是在源端和⽬标端有且只有⼀个manger 进程。

ü Extract : extract 进程运⾏在数据库源端，负责从源端数据表或⽇志中捕获数据。

Extract的作⽤可以分为两个阶段：①初始数据装载阶段:在初始数据装载阶段，extract进程直接从源端的数据表中抽取数据。

②同步变化捕获阶段：初始化数据完成以后，extract进程负责捕获源端数据的变化(DML和DDL)。

ü Pump : pump进程运⾏在数据库源端，其作⽤是将源端产⽣的本地trail⽂件以数据块的形式通过TCP/IP协议发送到⽬标端，这通常也是推荐的⽅式。

Pump进程本质是extract进程的⼀种特殊形式，如果不使⽤trail⽂件，那么extract进程在抽取完数据以后，直接投递到⽬标端⽣成远程trail⽂件。

ü Collector : collector进程与pump进程对应，它运⾏在⽬标端，这个进程可以不必太关注，因为在实际操作过程中，⽆需我们对其配置，所以对我们来说它是透明的。

Collector运⾏在⽬标端其任务就是把extract/pump投递过来的数据重新组装成运程trail⽂件。

ü Replicat : replicat进程通常称之为应⽤进程，运⾏在⽬标端，是数据传递的最后⼀战，它负责读取⽬标端trail⽂件的内容，并将其解析为DML和DDL语句，然后应⽤到⽬标数据库中。

2.OGG数据复制的数据流图3.OGG数据复制的机制⽰意图4.⽰例简单配置OGG4.1两边环境4.2配置运⾏环境（source/target）4.3安装GoldenGate软件(source/target)4.4配置源端数据库4.5配置⽬标端数据库4.6配置源端goldengate4.7配置⽬标端goldengate4.8分别在源端和⽬标端启动EXT1和REP1,并测试⽤户。

golden gate bridge听写

golden gate bridge听写
【最新版】
目录
1.金门大桥简介
2.金门大桥的历史
3.金门大桥的建筑特点
4.金门大桥的意义和影响
正文
金门大桥，又称金门海峡大桥，位于美国加利福尼亚州旧金山市，横跨旧金山湾和太平洋，连接旧金山市区和北部的马林县。

它是美国标志性建筑之一，也是世界上最著名的吊桥之一。

金门大桥的历史可以追溯到 1933 年，当时旧金山市为了解决跨海交通问题，决定建设一座吊桥。

建设工作于 1937 年开始，历时四年多，耗资约 3500 万美元，最终于 1940 年竣工通车。

金门大桥的设计者是工程师约瑟夫·斯特劳斯，他的设计在当时堪称是一项壮举，也为后来的桥梁建设提供了重要的参考。

金门大桥的建筑特点十分显著，其主跨长 1.28 公里，宽 27.4 米，高 74 米。

桥塔高 227 米，塔间悬挂着两条主缆，每条主缆由 12800 根钢丝组成，总长度达 128 公里。

金门大桥的橙色造型独具特色，已成为旧金山的地标之一。

金门大桥对美国乃至世界产生了深远的影响。

作为旧金山的地标，它吸引了无数游客前来参观和拍照留念。

此外，金门大桥在美国电影和电视剧中也频繁出现，成为了许多影视作品中的经典场景。

金门大桥还对世界桥梁建筑产生了重要影响，许多现代桥梁都借鉴了它的设计和施工技术。

总之，金门大桥不仅是旧金山市的标志性建筑，也是世界桥梁建筑史
上的一座丰碑。

golden gate bridge听写

golden gate bridge听写摘要：1.旧金山金门大桥的简介2.金门大桥的建筑历史3.金门大桥的建筑设计4.金门大桥的施工过程5.金门大桥的开通和意义正文：【1.旧金山金门大桥的简介】金门大桥位于美国加州旧金山市区，横跨旧金山湾，连接旧金山市区与北部的马林县。

大桥全长2.7公里，主跨1.28公里，桥面宽27米，桥塔高342米。

金门大桥是旧金山的标志性建筑，也是世界上最著名的大桥之一。

【2.金门大桥的建筑历史】金门大桥的建设始于1933年，由设计师约瑟夫·斯特劳斯（Joseph Strauss）负责。

约瑟夫·斯特劳斯在1916年就开始构思这座大桥，他的设计在当时引起了很大的争议。

然而，经过多次修改，他的设计最终在1931年获得了批准。

1933年，金门大桥正式开工建设，1936年完工，并在1937年5月27日正式对外开放。

【3.金门大桥的建筑设计】金门大桥的设计是悬索桥，采用两个钢塔支撑主缆，主缆承担桥面荷载。

这种设计使得桥面可以保持相对平稳，使车辆能够在大风等恶劣天气条件下安全通过。

此外，金门大桥的红色的大拱造型也成为其独特的设计标志。

【4.金门大桥的施工过程】金门大桥的建设过程充满了挑战。

由于当时的技术条件限制，建设者需要发明新的施工方法来解决各种工程难题。

例如，为了在旧金山湾的岩石上打下桥塔的基础，工程师们发明了一种称为“海底混凝土”的新技术。

在施工过程中，共有11人丧生，其中包括约瑟夫·斯特劳斯本人。

【5.金门大桥的开通和意义】1937年5月27日，金门大桥正式开通，吸引了大量民众前来参观。

金门大桥的开通极大地促进了旧金山湾区的发展，加强了市区与北部的联系。

此外，金门大桥还成为了美国西海岸的一个重要地标，吸引了世界各地游客前来参观。

golden gate bridge听写

Golden Gate Bridge，即金门大桥，是美国加利福尼亚州旧金山的一座标志性建筑，也是世界上最著名的桥梁之一。

它横跨在旧金山湾和太平洋之间，连接旧金山市和玛林郡，是加利福尼亚州公路1号公路的一部分。

金门大桥的建成极大地改善了旧金山湾区的交通状况，也成为了当地的重要旅游景点。

金门大桥于1937年5月建成，其设计风格独特，桥身采用国际橙色，给人一种独特的视觉冲击力。

桥梁的主梁是由悬索桥和悬索索力结构组成，使得它在世界各大桥中名列前茅。

在大桥上行车或步行，都能够欣赏到绝佳的美景，尤其是夕阳西下时，大桥在夕阳的映衬下显得更加壮丽。

对于我来说，Golden Gate Bridge是我向往已久的地方，我一直想要了解它的建造过程、设计理念以及背后的故事。

我准备通过本文来深入探讨金门大桥的各个方面，从而更加全面地了解这座桥梁的历史、文化和意义。

我想谈谈金门大桥的建造过程。

金门大桥的建造历时4年，耗资3500万美元，当时也创下了世界上最大的悬索桥的建造记录。

这座桥梁的建造并不容易，因为它横跨在旧金山湾上，海上的大风和波浪对施工造成了极大的困难。

而为了确保桥梁的安全性，工程师们不仅对建造材料进行了精心的选择，还进行了多次的结构模拟和强度测试，从而最终确保了金门大桥的稳固性和耐久性。

金门大桥的设计理念也颇具特色。

桥梁的设计者纳睿夫将桥梁设计成符合当时的现代风格，并且以纯粹美学的角度出发，桥梁的每一个细节都经过了精心的设计。

为了适应旧金山湾区的复杂地形和气候条件，设计者还对金门大桥进行了多次的参数调整和结构优化，使得桥梁能够在各种自然条件下依然稳固耐用。

回顾金门大桥的历史，我们不得不提到它的文化意义。

金门大桥不仅仅是一座桥梁，更是旧金山的象征和标志。

它见证了旧金山湾区的发展与变迁，也是旧金山湾区居民的骄傲。

金门大桥还是摄影、电影和文学作品中的常客，无数影视作品中都能看到金门大桥的身影，它成为了旧金山最重要的旅游景点之一。

金门大桥_精品文档

金门大桥金门大桥（Golden Gate Bridge）是美国加利福尼亚州旧金山湾区的一座标志性建筑和世界知名的桥梁，也是旧金山的象征之一。

这座悬索桥跨越了金门海峡，连接旧金山市与马林县。

金门大桥被公认为世界七大工程奇迹之一，以其壮观的风景和独特的设计而闻名于世。

金门大桥的建造始于1933年，历时约4年，于1937年完工。

这座桥的设计师是约瑟夫·斯特劳斯（Joseph Strauss），他提出的设计方案使得金门大桥成为了一项工程上的创举。

金门大桥不仅是一座交通枢纽，还是一座具有艺术价值的建筑。

金门大桥的总长约为2.7公里，桥梁主跨长约为1.3公里，是世界上第一座长跨大桥。

而大桥塔高达227.4米，仅次于法国的米拉斯大桥。

这座建筑奇迹由两座悬索桥塔和一条悬索索道组成，两座塔之间的主跨由两座悬索吊车支持。

金门大桥的建造面临着诸多挑战，其中最大的挑战之一就是金门海峡的恶劣天气。

海峡地区经常受到大雾、强风和强烈的海流的影响，这给建造者带来了极大的困难。

为了应对这一挑战，工程人员采取了创新的设计和施工方法。

他们开发了一种特殊的红色漆料，使得桥梁在大雾天气下也能够清晰可见。

同时，他们还采用了先进的钢材和混凝土技术，确保桥梁的稳定性和耐久性。

金门大桥的开通对旧金山市的发展产生了重大影响。

这座桥极大地改善了旧金山与周边地区的交通状况，加快了城市的经济发展。

此外，金门大桥也成为了旅游景点，吸引了大量的游客来此观光。

无论是行驶在桥上还是从远处观望，金门大桥都呈现出令人叹为观止的美景。

金门大桥所处的位置也使得它成为了一组令人叹为观止的风景照片的主角。

海湾的蔚蓝与桥梁的金色交相辉映，呈现出一幅绝美的画面。

人们常常选择从金门公园或巴特勒山观景台欣赏这座桥的壮观景色。

这里也是摄影爱好者们的天堂，每年都有无数的人们前来拍摄金门大桥的照片。

不仅如此，金门大桥也是旧金山市的重要地标之一。

每年的金门大桥庆典成为了旧金山最重要的活动之一。

The_Golden_Gate_Bridge_金门大桥

河南郑州市惠济区实验小学王雪杨编译The Golden Gate Bridge is one of the most famous bridges in the world. It is a symbol of San Francisco, standing as one of the world’s most beloved landmarks. Its tall frame, two large towers, and orange color make the bridge easy to recognize. Yet as the Golden Gate Bridge was being built, people disagreed about what the bridge should look like.金门大桥是世界上最著名的桥梁之一。

它是旧金山的象征，作为世界上最受喜爱的地标之一矗立着。

它那高高的框架、两座巨大的塔楼和橙色外观使这座桥十分醒目。

然而，在金门大桥建造过程中，人们对其外观颇有争议。

People were worried that San Francisco’s thick fog would make the bridge hard to see. The U.S. Navy wanted the bridge to stand out, so ships and airplanes wouldn’t collide with it. Theywanted the bridge to have wideblack and yellow stripes, like abumblebee! Irving Morrow wasone of the bridge designers. Hedid not like the idea of a stripedbridge. Morrow did not want a plain black or gray bridge either, though. He thought a dark bridge would make the Golden Gate seem smaller than it was.人们担心，旧金山的大雾会使大桥难以看清。

伦敦白金汉宫

伦敦白金汉宫
这座宫殿建于17世纪，拥有775个房间，其中包括19个国宴厅和52个卧室。

它是英国女王的工作地点和居住地，同时也是举办国家庆典和重要宴会的场所。

在参观白金汉宫时，你可以欣赏到宏伟的建筑风格和精美的宫殿内部装饰。

别
错过皇家卫队的换岗仪式，他们身着华丽的红色制服，展示着英国传统的仪式和纪律。

此外，白金汉宫还拥有丰富的艺术和文化藏品。

你可以在皇家收藏室里欣赏到
众多珍贵的艺术品和历史文物，其中包括绘画、雕塑和珠宝等。

总之，白金汉宫是一处不可错过的伦敦景点，它展示了英国王室的辉煌历史和
文化底蕴。

无论你是对历史感兴趣，还是想了解英国王室，这里都会给你留下深刻的印象。

让我们一起来探索这座令人惊叹的宫殿吧！。

美国旧金山：金门大桥 Golden Gate Bridge

美国旧金山：金门大桥Golden Gate Bridge金门大桥（Golden Gate Bridge）(2013-08-12 20:50:56)金门大桥是世界著名的大桥，这座大桥新颖的结构和超凡脱俗的外观，被国际桥梁工程界认为是美的典范，是世界上最上镜大桥之一。

是旧金山的象征性地标，至今已有七十多年的历史。

P1-- 金门大桥" name=image_operate_31371376298956300 alt="[美国之行] -- 金门大桥"src="/DownloadImg/2013/09/2 109/35341917_2" width=690 height=435real_src="/DownloadImg/2013/ 09/2109/35341917_2"action-data="http%3A%2F%%2Fmw690 %2F6d18b507gx6BNwp8UFif0%26690"action-type="show-slide"> 金门大桥的北端连接北加利福尼亚，南端连接旧金山半岛，跨越加利福尼亚州宽1900多米的金门海峡之上。

金门大桥于1933年动工，1937年5月竣工，用了4年时间和10万多吨钢材，耗资达3550万美元。

整座大桥凭借桥两侧两根钢缆所产生的巨大拉力高悬在半空之中。

钢缆和桥身之间是用一根根细钢绳连接起来。

两座高大的巨型钢塔之间跨度达1280米，为世界上罕见的单孔长跨距大吊桥之一。

金门大桥的设计者是工程师史特劳斯，人们把他的铜像安放在桥畔，用以纪念他对美国作出的贡献。

(网络资料)P2-- 金门大桥" name=image_operate_47831376298803520 alt="[美国之行] -- 金门大桥"src="/DownloadImg/2013/09/2 109/35341917_3" width=690 height=456real_src="/DownloadImg/2013/ 09/2109/35341917_3">P3 从西南方向的视角纵观金门大桥，其景象也堪称一绝。

英国白金汉宫英语简介

英国白金汉宫英语简介是英国君主位于伦敦的主要寝宫及办公处。

宫殿坐落在威斯敏斯特，是国家庆典和王室欢迎礼举行场地之一，也是一处重要的旅游景点。

1703年至1705年，白金汉和诺曼比公爵约翰·谢菲尔德在此兴建了一处大型镇厅建筑“白金汉屋”，构成了今天的主体建筑，1761年，乔治三世获得该府邸，并作为一处私人寝宫。

在英国历史上的欢庆或危机时刻，白金汉宫也是一处重要的集会场所。

1837年，维多利亚女王登基后，白金汉宫成为英王正式宫寝。

现在的白金汉宫对外开放参观，每天清晨都会进行著名的禁卫军交接典礼，成为英国王室文化的一大景观。

下面店铺为大家带来旅游英语英国白金汉宫英语简介，欢迎大家阅读!英国白金汉宫英语简介：The graceless colossus of Buckingham Palace, popularly known as "Buck House", has served as the monarch's permanent London residence only since the accession of Victoria. Bought by George III in 1762, the building was overhauled by Nash in the late 1820s, and again by Aston Webb in time for George V's coronation in 1913, producing a palace that's about as bland as it's possible to be.For two months of the year, the hallowed portals are grudgingly nudged open; timed tickets are sold from the tent-like box office in Green Park at the western end of The Mall. The interior, however, is a bit of an anticlimax: of the palace's 660 rooms you're permitted to see just 18, and there's little sign of life, as the Queen decamps to Scotland every summer. For the other ten months of the year there's little to do here, since the palace is closed to visitors - not that this deters the crowds who mill around the railings, and gather in some force to watch the Changing of the Guard, in which a detachment of the Queen'sFoot Guards marches to appropriate martial music from St James's Palace (unless it rains, that is).You can view a small selection of the Royal Collection - which is more than three times larger than the National Gallery's - at the Queen's Picture Gallery (daily 9.30am-4.30pm; ￡4), round the south side of the palace on Buckingham Palace Road. The exhibitions usually include some works by Reynolds, Gainsborough, Vermeer, Rubens, Rembrandt and Canaletto, which make up the bulk of the collection.There's more pageantry on show at the Nash-built Royal Mews (April-Sept Tues-Thurs noon-4pm; Oct-Dec Wed only; ￡3.50), further along Buckingham Palace Road. The royal carriages, lined up under a glass canopy in the courtyard, are the main attraction, in particular the Gold Carriage, made for George III in 1762, smothered in 22-carat gilding and weighing four tons, its axles supporting four life-size figures.英国白金汉宫英语简介是英国君主位于伦敦的主要寝宫及办公处。

金门大桥英文介绍ppt

金门大桥英文介绍ppt goldengate bridge suspensionbridge spanning goldengate strait. frommerstravel guide considers goldengate bridge "possibly mostbeautiful, certainly mostphotographed bridge hasbeen declared one modernworld americansociety civilengineers. golden gate bridge chief designer: joseph. strauss structural design :charles alton ellis building length: 2,737m longest span: 1,280m bridge tower height: 342m commencement date: january 1933opening date: may 27, 1937 mericanlandmark, th tebridge has been used umerous media videogames current issues 1.suicide morethan 1600 people jumpersdie from impact trauma. about 5% jumperssurvive initialimpact generallydrown coldwater. 2.wind sinceits completion, goldengate bridge has been closed because weatherconditions only three times. anemometer(风速计 mightytask done,resplendent westernsun, bridgelooms mountain high, its titan piers grip ocean floor, its great steel arms link shore shore,its towers pierce sky."thanks yourattention 2je1agz 分享于 2019-04-17 00:00:10.0 金门大桥英文介绍pp

金门大桥英文版介绍

• The golden gate bridge across the golden gate, imposing appearance in the whole bridge spectacular(壮观的).
Thanks for that! Bye！
Joseph Strauss(约瑟夫·斯特劳斯
•The Golden Gate took only 52 months to design and build, and was opened in 1937.
• Before 1957, the Golden Gate Bridge is the world‘s
批注本地保存成功开通会员云端永来自保存去开通•Golden Gate Bridge is one of the world-famous bridge, known as a miracle (奇迹）of modern engineering.
Golden Gate Bridge across the North and South, San Francisco and Marin County will link up. .
• Last year, have 38 people jumped off the golden gate bridge. So far this year, and end there are 19 life.
• The experts think seeking a suicidal person rescued, the architectural protector is to hope not add ugly accessories.
longest suspension bridge(悬索桥）, two bridge piers（桥墩） in 1964, before the world’s longest span（跨度） suspension bridge.