以下

First, the paper discusses microwave anechoic chamber design techniques before the reflectivity level of quiet zone is calculated.

在对暗室静区反射率电平进行计算以前，本文先讨论了微波暗室的设计，主要可分为以下几个步骤： 1。

Since I don't have access to an anechoic chamber, I'm performing my tests outdoors on a big field with no nearby large reflective surfaces (usually ~10 m distance is considered adequate for testing frequencies down to 10 Hz).

因为我没有一个完全隔音的视听室，我的测试地点选用户外，在一个没有大面积反射体的空旷的空地上（通常认为左右的距离足够测量10Hz以下的低频）。

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。

In her New England Journal of Medicine article, Marcia Angell advocates which of the following in developing countries?

Marcia Angell的《新英格兰医学学报》文章提倡在发展中国家进行以下哪一项？

As Ecclesiastes and Ecclesiasticus indicate, the upper classes adhered for a long time to the Biblical view concerning the soul and the hereafter, caring little for the Angelology and Demonology of the Pharisees.

正如传道书和Ecclesiasticus表明，在上层阶级坚持了很长一段时间的圣经观点的灵魂和以下，照顾小的天使和魔鬼的法利赛人。

"A particularly interesting finding of this study is that the vaccine achieved fairly good control of blood pressure in the early morning hours," said Juerg Nussberger, M.D., Division of Angiology and Hypertension, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland, who presented the study in a Tuesday media briefing.

Juerg Nussberger博士认为与降压药物相比，高血压疫苗具有以下优势：（1）降压药物半衰期短，无法稳定控制清晨血压，而这正是高血压疫苗所擅长的；（2）高血压疫苗只需每四周注射一次，依从性明显好于降压药物；（3）高血压疫苗可有效控制血压，而降压药物只能使四分之一的患者血压得到成功控制。

The method which is used to measure and compute moment, yield and turning angle by steel bar gauge is introduced in detail. According to the measuring results, the horizontal critical load of the testing pile is 120 kN. The steel bar gauge measuring results show that the largest moment is located in the depth from 2 m to 3 m under the horizontal load, it transfers to the deeper location with the increase of the horizontal load, and the bend distortion only occurs in the upper of 1/3 pile length.

结合实际工程详细地介绍了利用钢筋计测试水平荷载作用下桩身弯矩、挠度和转角分布的方法，根据桩顶位移和钢筋内力测试结果判定试验桩的水平临界荷载为120 kN；根据钢筋计测试结果可知，在水平荷载作用下，桩身最大弯矩截面位于在地面以下2～3 m处，且随着荷载的增大最大弯矩截面逐渐向深部转移；发生弯曲变形的部分主要是桩长1/3以上的桩体，而其下的桩体几乎不发生变形。

In this paper, based on the specific CNG engine parameters and characteristics, the influence of the injection timing, ignition energy and lean combustion for the engine is tested, in order to explore the control rules of fuel injection, ignition energy and lean combustion and then draw the following conclusions: small injection advance angle of electronic controlled injection CNG engine is optimum

文章根据天然气发动机的具体参数和特性，探索电控喷射CNG发动机在燃料喷射、点火能量和稀燃等方面的控制规律，确定最优的控制参数，开展了喷射定时、点火能量及稀薄燃料等参数对发动机性能影响的试验研究工作，并根据试验结果分析，得出了以下结论：电控喷射WT615CNG发动机燃料喷射提前角要小些为宜

A contact angle of water on the film is in a range of 5 to 30 DEG , and an average surface roughness of the film is 5 nm or less.

水在薄膜表面上的接触角在5-30°范围内，薄膜的平均表面糙度为5nm或以下。

Through the identification of inividual faces of seventy pictures and of ten subjects, the experimental results show that the system recognition performance has no direct relation with the type of input human facial images. The facial feature invariabilities are better that guarantees the correct recognition of subject's face within the limits of deviation angle of head along the four orthogonal directions.

通过对70张相片的输入人像和10个受试人面像的识别，实验结果表明：系统的识别效果与输入人像的类型没有直接的关系，人像的特征稳定，保证了受试人面部在20°以下的偏角范围内面像的正确识别。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。