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The main work and the originality points of this dissertation could be concluded as the following parts:(1) To analyze systematically the mathematical model of LES of air flow in great space, under the case of isothermal and non-isothermal, as well as the combined action of buoyancy and strain. Some basic problems are studied about the LES application into airflow simulation of great space, such as boundary conditions, spatial difference scheme and time advancing scheme, time step etc., which creates the basis for the LES application to indoor airflow simulation.(2) Both the instantaneous and time averaged flow field of great space with multiple jets under isothermal and non-isothermal cases are explored with large eddy simulation method, and also discussed the dynamic characteristics and the law of fluidflow in the great space.(3) Based on the results of LES of the great space and the Fanger thermal comfort indexes, it is brought forward the concept of the series of dynamic thermal comfort evaluating indexes, which could be divided into thermal comfort index with time averaged properties PD, PPD, PMV, thermal comfort index with instantaneous properties IPD, IPPD, IPMV, and time averaged thermal comfort indexes TAPD, TAPPD, TAPMV, and transient situations time averaged thermal comfort indexes TTAPD, TTAPPD, TTAPMV. The differences among them and the calculation methods are discussed, and the four kinds of indexes are calculated with the thermal comfort index PD as an example.(4) Based on the LES results it is discussed the hot air stratification phenomena in air-conditioned buildings in the case with air supply and return registers on the ceiling and the case on the sidewall. The fundamentals of the hot air stratification are studied and the relations of estimating hot air stratification are brought forward.(5) With the advanced apparatus such as hot wire film anemometer IFA300 and laser particle field anemoscope, corresponding model test and site measurements have been done, which are compared with the simulation results and LES is proved a very promising method in air flow simulation indoor.

本文主要工作既创新点体现在以下几个方面:(1)系统分析了等温、非等温和考虑剪切力与浮升力综合作用的高大空间大涡模拟数学模型,并研究了高大空间大涡模拟在室内气流仿真应用中的一些基本问题,如边界条件、空间离散格式和时间推进格式、时间步长选择等问题,为大涡模拟在室内气流计算中的广泛应用打下了基础;(2)首次用大涡模拟方法研究了高雷诺数下高大空间多射流在等温、非等温情况下的瞬时流场和时均流场分布,并探讨了多射流流场的动态特性和流动规律;(3)基于大涡模拟的动态仿真结果和Fanger的热舒适指标,首次系统地提出了动态热舒适评价指标体系的概念:即基于时间平均参数的热舒适指标PD、PPD、PMV;基于瞬时参数的瞬时热指标IPD、IPPD、IPMV;基于时间平均热舒适指标TAPD、TAPPD、TAPMV;以及沿行动迹线的时间平均热舒适指标TTAPD、TTAPPD、TTAPMV,并分析了四类热舒适指标的差异性和计算方法,还以PD值为例对四类指标分别进行了计算;(4)基于数十种工况下空调房间大涡模拟的结果,研究了空调建筑上送上回和侧送侧回两种情况下热分层现象,并探讨了热分层的基本规律,首次提出了避免热分层现象的判断公式;(5)在暖通空调领域,首次使用IFA300热线风速仪、激光粒子速度场仪等先进设备,完成了与大涡模拟相对应的模型试验,并把实测结果与仿真结果进行了对比,说明LES在室内气流仿真方面是一种很有前景的方法。

On the net collect summed up the following respects, offer text to receive the main page on the site repeatedly, according to website size, more or less can webpage numerary receive all pages repeatedly even; For every join provides a brief introduction, in order to hints this one's duty allows the person that visit is about which on one hand; Exceed in website map and text the mainest crucial term alludes inside join, the help searchs theme of page of join of engine identifying place is about which on one hand; Help engine indexes a few dynamic pages, because a few pages will be of dynamic generation, if not be user behavior is called,will not show come, can put this join on website map, in order to help the dynamic page with engine main index; To make website map attracts the visit of network spider, the descriptive sex statement with go up certain must be written to use this connective keyword to have simple description at the back of join, but the use keyword that cannot transfer, can be just the opposite to what one wished otherwise; Because general spider catchs page of before 3 class only, so website map makes the same score better more, what point to here is logical way, is not physical method.

在网上搜集总结了以下几个方面,提供文本连接到站点上主要的页面,根据网站大小,网页数目的多少甚至可以连接到所有的页面;为每个连接提供一个简短的介绍,用以提示访问者这部分内容是关于哪一方面的;在网站地图和文本超连接里面提及最主要的要害词语,帮助搜索引擎识别所连接页面主题是关于哪一方面的;帮助引擎索引一些动态页面,由于一些页面将是动态产生的,假如不是用户行为调用将不会显示出来,可以将此连接放在网站地图上,以帮助引擎索引重要的动态页面;为了使网站地图吸引网络蜘蛛的访问,一定要在连接后面写上一定的描述性语句并使用此连接的要害词进行简单描述,但不能过渡的使用要害词,否则会适得其反;因为一般蜘蛛只抓前三级页面,所以网站地图越平越好,这里指的是逻辑路径,而不是物理路径。

Based on the designing mode of Web site with shopping on-line, utilizing JSP empoldering mode, the work concretely realized purchasing book on line、dynamic search、customer registration and log-in on function module at the front-end and the administrator can manage all kinds of books, special member and the publishers on the background.

本作品的设计基于Web网站的网上书店的设计思路,运用JSP开发模式,前台实现了网上购书、动态查询、用户注册、登陆等功能模块;后台实现了管理员对书店的图书管理、会员管理及出版商管理。

Large numbers of test data which is systemic, credible, exact and detailed was acquired during the processing of these two scientific research item and settlement value and theoretical analysis on trial section was done together with the test and research on the site. The connection between the rule of settlement in the transition zone and the parameter such as groundsill, transmogrification modulus, material and density was studied based on comparing true settlement value in trial section with settlement value of theoretical calculation by frame analysis software. And it will help the farther research on design and construction about road-bridge transition zone.

同时在两个科研项目开展过程中,取得了大量系统、详实、可靠的试验数据,并结合现场试验研究工作,在室内开展了深入细致的过渡段沉降变形数值计算和理论分析研究,运用有限元分析软件,对过渡段的沉降变形进行了仿真数值模拟计算,与现场实测数据进行了对比分析,全面考察了过渡段地基土层与变形模量、路堤填料与压实密度等参数对过渡段沉降变形的影响规律,为进一步研究路桥过渡段的设计和施工可以提供借鉴。

Since H〓S and SO〓 adsorbed on TiO〓 could react with each other and TiO〓 is the medium of their electron transfer, thus SO〓 could not be adsorbed quite strong on the active site of TiO〓, which makes it more resistant to sulfating and increase the stability of catalyst. Finally, the model and mechanism of the reduction of SO〓 by NH〓 to elemental sulfur is advanced as follows: on the sulfide catalyst, ammonia is decomposed to N〓 and H〓, and H〓 reacts with SO〓 to form the intermedium of H〓S; then H〓S and SO〓 react as Claus reaction on TiO〓 catalyst.

反应系统中过量水蒸气的存在使催化剂表面某些活性位被水蒸气抑制使活性和选择性有较大幅度降低,但这种影响是可逆的,不会造成催化剂永久性中毒;另外当单质硫和水蒸气同时存在时,在〓催化剂上能够生成硫化氢和二氧化硫,而且由于硫化氢和二氧化硫化学吸附能力不同而导致它们的脱附顺序不同,硫化氢的生成温度总是低于二氧化硫的生成温度,说明过量水蒸气的存在会导致氧化物催化剂上逆克劳斯反应的发生;而在硫化物催化剂上几乎没有硫化氢和二氧化硫生成,说明硫化物催化剂能够抑制逆克劳斯反应的发生。

Up down:2/8 Lefte/Right:4/6 Menu on/off 7 Select:5 Back: 1/Back button In Text Edittor: Page Up/Down 2/8 Full screen:* Menu on/off:7 close:/Back buttom To avoid getting security prompts when accessing the local file system ,please make sure that you have set the access permissious for MobyExplorer on your phone to"Never ask"Please consult your phone manual or our web site for instructions on how to do this.

上下: 2月8日 Lefte /右: 4月6日菜单开/关7 选择: 5 回: 1/Back按钮在文本Edittor :网页上/下2月8日全屏:*菜单开/关: 7 收盘:/返回按钮为了避免安全提示时,访问本地文件系统,请确保您已设置的访问permissious的MobyExplorer在您的手机上,以&绝不会要求&请咨询您的手机的手册或我们的网站,关于如何进行的指示this。

The ESEU website includes information about ESEU activities. Worksheets for teaching earth sciences at key stages 3 and 4, used in INSET training, are available from the site. The documents (in PDF format, requiring Adobe Reader) cover topics such as the rock cycle, rock identification, the changing Earth and atmosphere, plate tectonics and outdoor activities. Resources available on the site include: a virtual rock kit with images of sedimentary, igneous and metamorphic rocks; links to related sites; and recommended textbooks.

网站内容包括机构信息及活动信息介绍、地球科学教学第三和第四阶段工作表内容介绍、网上地球科学培训资料、免费文件全文内容(主题涉及到岩石圈、岩石鉴别、地球表面及大气层变化、板块构造论以及各种室外活动等内容,为pdf格式)以及相关的资源(包括各种沉积岩、火成岩及变质岩照片、相关网站链接以及一些推荐教科书)等内容。

If so, you might find yourself creating web site mockups in Photoshop for clients and then passing on the design to web site coders to get the final product in HTML.

如果是的话,您可能会发现自己创建的网站mockups在Photoshop中为客户,然后通过对设计到网站编码,以得到最终的产品在HTML 。

This paper, based on the author's investigation to the World Heritage Site of Angkor, points out existing problems, presents a strategy to protect the site.

作者在对吴哥世界遗产地考察的基础上,指出了这一遗址保护和管理存在的问题,并提出了相关保护对策。

Thus there is an Indus Valley site on the Oxus river at Shortughai in northern Afghanistan (Kenoyer 1998:96) and the Indus Valley site Alamgirpur at the Hindon river is located only 28 km from Delhi.

因此,阿富汗北部(基诺耶 1998:96)肖尔土嘎依的奥可斯河有印度河流域文明遗址。印度河流域文明遗址还座落在离德里28公里处印度河的阿兰吉布尔。

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推荐网络例句

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。