防扩散

After Cold War, the status of Foreign Aid declined in the U.S national stratagem and its fund has been decreased to a level of less than a third of that in peak. After 9.11 Events, the global stratagem of the U.S changed in a large degree and transferred its core to Antiterrorism and anti-diffusion of weapons of mass destruction. At that time, the U.S drew its attention back to the Foreign Aid, such as Political Aid, Military Aid and Economic Aid, and took it as a powerful tool in global antiterrorist stratagem.

冷战结束后，对外援助在美国国家战略中的地位有所下降，美国对外援助的拨款一度降到不到其高峰期的三分之一的水平。9.11恐怖袭击后，美国全球战略发生重大转变，反恐和防止大规范杀伤性武器的扩散以保障其国家安全成为美国的核心战略，美国在全球展开了声势浩大的反恐战争，这时候，小布什政府开始重新重视对外援助，把对外援助当作其全球防恐战略的一个有力工具，政治、军事援助和基于政治、军事目的的经济援助在小布什么政府里又开始大行其道。

That is, both numerical simulation and model experiments are complemental to each other. The main point of the thesis are as following:1. Vertical pipe inlet/outlet is simplified as an axisymmetric model in the research, and flow field is simulated with second-moment Reynolds stress model and VOF.

本文的主要工作有： 1、将竖井式进／出水口概化为轴对称模型，应用雷诺应力模型和自由面常采用的VOF法，对抽水和发电工况下竖井扩散段、孔口、防涡梁下的水流流动特性进行了数值模拟。

They are periodical inspect and report rat's statas.chronic and acute raticide.

在控制鼠害过程中，采取定期监测与鼠情报告、急性灭鼠剂与慢性灭鼠剂、化学药物与物理器械、突击灭鼠与日常防鼠、重点杀灭与全面投药＂五结合＂的技术方法，鼠密度从交付使用后的32.46％下降到0.47％，并保持在3％以下；降低基建工地和外围环境的鼠密度、切断老鼠侵入和扩散的通道，是控制新客站鼠害的关键。

The performance of BL3 safety laboratory in preventing experimental aerosol diffusion and sterilizing microbe aerosols through high efficiency filter in a ventilation system was tasted.Aerosols of uranin, vibrio phage and Bacillus subtilis var. niger spores were used for the test.

采用荧光素钠、弧菌噬菌体和枯草芽胞杆菌气溶胶对P3级微生物安全实验室防气溶胶扩散性能及其排风系统中高效过滤器滤除气溶胶的效果进行了检测。

Bird Flu: MOA requires yesterday intensified measures to control the live bird/chicken market to prevent spreading.

禽流感：农业部昨日要求各地加强各项措施防控活禽市场，以防止病毒扩散。

Referring to the architecture characteristics of the subway station and diffusion rule of the fire smoke, air curtain is first proposed to be used at the exit of staircase in the subway station to ensure the safe evacuation.

笔者根据地铁站建筑结构特点及火灾烟气的扩散规律，首次提出将空气幕用于地铁站楼梯口防烟，以保障火灾时人员的安全疏散。

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Smoke diffusion controlled by smoke-preventing air curtain is simulated and analyzed by CFD when a train catches fire.

并用CFD方法模拟分析一列地铁列车着火时，防烟空气幕对烟气扩散的控制。

The result indicates that more than 6 minutes for safe evacuation could be attained by smoke-preventing air curtain; moreover, the quantity of fresh air could be reduced compared with the traditional ways.

结果表明，在楼梯口设置防烟空气幕不仅可以保证人员在6分钟以上的安全疏散时间，而且减少了比传统方式所需的新鲜空气量，有效阻止火灾的进一步扩大和控制烟气扩散。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。