查询词典 ceiling

It was used especially by 15th-century Flemish painters (e.g., Jan van Eyck's Ghent Altarpiece, 1432) and in the late 18th century to imitate Classical sculpture in wall and ceiling decoration .

15世纪的法兰德斯画家(例如艾克的根特祭坛画〔1432〕)和18世纪后期的画家，在墙壁和天顶装饰画中尤多使用，藉以仿效古典雕塑效果。

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。

You can not miss the Vatican Museum especially the Sistine Chapel which is one of the master pieces in the whole art history. The museum has works of art of painters during the Renaissant, including Botticelli, Fra Angelico and Michelangelo who painted for the ceiling.

不可不看的还有梵蒂冈博物馆，特别是西斯廷厅，那是整个艺术史的最高层次的杰作之一；文艺复兴时期的几位意大利大师都为其绘画：波提切利、基尔兰达佑和米开朗琪罗，后者画了天花板上的壁画。

I've seen more ceiling than Michel Angelo.

我研究屋顶的时间比米开朗基罗还要长。

Technically, the legislation can be fashioned to authorize billions of dollars in funds for the antidrug effort but permit actual spending of only a small amount in the fiscal year 1989 to remain under the budget ceiling.

技术上，可以通过适当立法授权为反毒品措施动用数十亿元。但为避免超过预算，在1989会计年度实际仅用一小部分。

Kurt noticed the LOTUS antitank mines stuck on this room's walls and ceiling, making it a good kill zone.

库尔特注意到莲花反坦克地雷被贴在房间的墙壁和天花板上，形成了一个很好的杀伤区域。

You see,the first glass,that's the glass of health,and in that the herb of health is found growing;put it up on the beam in the ceiling,and at the end of the year you may be sitting in the arbour of health.

你要知道，第一个杯子是健康的杯子！它里面长着健康的草。你把它放在大梁上，到一年的末尾你就可以坐在健康的树阴下了。

This chamber is a brilliantly lit chamber with a ceiling arching high above.

这是个亮堂堂的房间，房顶高高地拱起。

When baby grows, the armature can be removed, and the light pattern can project onto the ceiling.

当婴儿的增长，电枢可以删除，光模式可以投射到天花板上。

General Atomics, San Diego, Calif., is being awarded a ＄573,000,000 ceiling priced, undefinitized contract action for the production of the Electromagnetic Aircraft Launch System CVN 78 Shipset.

位于加利福尼亚州圣地亚哥的General Atomics公司日前获得了价值5.73亿美元、关于生产CVN-78舰船电磁飞机发射系统的未定案合同。

Graf, without question, is the greatest women's player in history.

格拉芙，现在，毫无疑问是女子网坛历史上最伟大的选手。

If not, you will have to look around at all your important data.

如果没有，您将需要检查所有的重要数据。