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The Alpha test is conducted at the developers' site by the customer with the developer monitoring the recording of errors and other usage problems.

大多数开发人员使用 Alpha 和 Beta 测试来发现只有最终用户才能发现的错误。Alpha 测试由用户在开发现场进行,开发人员监控并记录错误和其他使用问题。

Anechoic chamber is the primary test site of electromagnetic radiation measurement, also the important facility for antenna and wave propagation research.

电波暗室是辐射电磁场的主要测量场地,也是研究天线与电波传播特性的重要试验设施。

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。

Pre-stressed composite space truss is one of the new kind of space structure systems developed on the basis of prestress and space truss, which consists of steel and reinforced concrete. At present the study in this field is just being begun in our country. Therefore, in this paper static and dynamic performances of pre-stressed composite space truss associated with a practical engineering are studied, in addition, dynamic test on construction site and model experiment are done. Finally, we conclude this structure is well in stress and stiffness and dynamic characteristics.

预应力组合网架是一种基于网架和预应力技术发展起来的由钢和钢筋混凝土组合而成的新型预应力空间结构体系,目前国内在此领域的研究和应用都较少,为此,本文结合实际工程对预应力组合网架进行了静力和动力的分析研究,并作了施工现场的动力测试及模型试验,总结出预应力组合网架受力比较合理,刚度、动力特性好,是值得推广的一种空间结构形式。

Plan world network on April 30 message now, skyline community collects the whole people with large skyline publicly in skyline test site to participate in interactive game-- the opinion of skyline bleachery and proposal.

计世网4月30日消息今日,天涯社区在天涯试验场中公开征集天涯大型的全民参与互动游戏--天涯晒场的意见和建议。

The model includes that the relationship between median diameter, as well kinetic energy, of raindrop and rainfall intensity obeys logarithmic function, the critical slope degree of soil erosion is 38.4°~43.0° in test area and the best multiple index of rainfall erosivity value is /100. Employing the prediction model, the soil erodibility value, the accelerated value of excavation slope, roadbed slope, construction site, borrow pit, service road and other temporary occupation land and the loss-spoil ration of waste pile were examined. Finally, the integrated soil and water conservation measures in highway construction project have been suggested.

从而建立了凉山州天然降雨雨滴中数直径与雨强的关系和降雨强度与动能的关系,分析了高速公路引起水土流失的侵蚀性降雨标准、侵蚀转折坡度及不同流失区流失量的大小关系,给出了高速公路水土流失预测模式中降雨侵蚀力尺值的最佳复合指标,估算出路堤边坡、路堑开挖边坡、路基、临时施工用地、取土场、便道和其它临时占地的可蚀性K值、加速侵蚀系数A值以及的弃土场的流弃比B值,最后针对高速公路不同防治区水土流失特点提出了相应的综合防治措施。

The chain between air valve operational rule and bed stratification is set up, which supplies the reliability for control decision-making of expert system. Expert control strategy is put forward based on the characteristic of jigging process in this article. Knowledge acquisition, knowledge expression, search method and reasoning mechanism are studied in the expert system. The rule-base is set up based on bed stratification status, bed mobility status, feed velocity, recording data on site, artificial float and sink test result.

本文根据跳汰过程的特点,提出了专家控制系统的构成框架,研究了分层过程控制专家系统的知识获取、知识的表示与检索方法及推理机制,并根据分层状态、床层松散状态、给料速度信息和现场运行记录及定时人工筛分浮沉结果进行推理,建立了专家系统规则库,给出了具体的风阀操作参数的调节方法。

The model can be designed according to the absolute normal model scale or the distorted model scale, in consideration of the conditions of the test site and water supply capacity etc., this experiment designs model in the light of the distorted model scale . The distorted model scale can satisfy the similarity conditions of surge equation and water hammer equation.

试验模型可以设计成正态,也可以设计成变态,考虑到试验场地、供水能力等因素,模型按变态设计,模型比尺同时满足了波动方程和水击方程的相似条件。

To find more applications with the model,a correction factor is determined through pull-out test in site.

为了使理论模型更接近实际,提出了以现场拉拔试验确定模型参数的方法。

However, this examination never has a standard answer; in other words, it is a test that challenges examinees' capability and endurance, and moreover, its judgment is not made at present or on the site but may show up behind the curtain of time or in the far future.

有许许多多应试者怀着朴素的理想和最初的冲动进入考场,希翼能够尽快找到解题的方式,获取成功的答案,但是,这种考试是一种没有标准答案的考试,或者说,对于所有的受试者,它是一种不仅检测能力而且检测耐力的考试,它的评判者甚至不在考试的当下和现场,而在时间帷幕的后面或遥远的将来。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。