查询词典 transient stability

Through the analysis, the paper reaches the following basic conclusions: The quantity of Chaoyang district"s transient population will increase continuously, residential period will prolong gradually and renting house will still be the major residential way of transient population; transient population play a positive role in the district"s socioeconomic development, but on the other side they make city infrastructures more difficult to bear the existent heavy burden, difficulty in city management is increased; transient labor force mainly undertake the supplementary role of the district labor force, but along with the open of the labor force market step by step and the further improving of the quality of transient labor force, the competition between transient labor force and local labor force tends to be intense; the current management policy of transient population in Beijing exists some problems, which stresses management and makes light of service, stresses duties and makes light of rights and interests, stresses planning and makes light of market, stresses outside and makes light of inside, but the policy is tending to the developing direction that is helpful for transient population to flow.

文章通过分析得出以下基本结论：朝阳区外来人口的数量还会继续增长，居住时间逐渐延长，租住房屋仍然是外来人口最主要的居住方式；外来人口在为本区社会经济发展起到积极作用的同时，也使城市基础设施不堪重负，城市管理难度加大；外来劳动力主要承担着本区劳动力的补充角色，但随着劳动力市场的逐步开放和外来人口素质的进一步提高，外来劳动力与本地劳动力的竞争趋于激烈；北京市现行的外来人口管理政策存在着重管理而轻服务、重义务而轻权益、重计划而轻市场、重外部而轻内部的问题，但正趋于有利于外来人口流动的方向发展。

Corporeality is transient, feeling is transient, perception is transient, mental formations are transient, consciousness is transient.

corporeality是短暂的，感觉是短暂的，知觉是短暂的，精神的编队是短暂的，意识是短暂的。

In this paper, using transient energy function as the assessment of system stability and applying the derivative of TEF to determine the control strategy of Fault Current Limiter with controllable series compensation in transient stability process, the transient stability characteristics can be effectively improved and subsequent oscillation can be quickly damped.

1引言具有可控串联补偿功能的故障限流器(FCL with controlled series compensation)作为灵活交流输电的主要装置之一，装设在并行线路具有许多优点。如图1所示，正常工作时，它能连续、快速、大范围地调节线路阻抗，从而灵活调节线路电流、增强系统阻尼、改善系统动态性能、抑制次同步振荡。

Firstly, the transient stability of the modes by which some kinds of huge power suppliers are connected with AC power grid is analyzed and compared in detail; then a detailed transient stability simulation of a certain large-scale demonstration system is performed; finally some helpful conclusions are obtained: in the general situation, the bundling power transmission mode is favorable to increase the stability of sending system; if it is helpful to evidently increase the inertia of the equivalent leading group, the mode that connects the huge power supplier with sending system will be helpful to enhance the stability of sending system, however it is necessary to perform simulation and analysis while these principles are applied to FACT systems.

首先从机制上对几种大电源接入交流系统方式的暂态稳定性进行了详细的分析和比较；然后对大型算例系统进行了详尽的暂态稳定仿真；最终得出了一些有用的结论：一般情况下，打捆送电方式有利于提高送出系统的稳定性；如果有助于显著增加领前群的惯量，则与送端系统相联的方式也有助于提高送电系统的稳定性，但仍要结合具体系统进行分析。

This paper introduces the practice of applying normalized transient energy function for transient stability assessment in Henan power network with transient stability control.

介绍考虑稳定控制措施后的归一化能量函数在河南电网暂态稳定性分析中的应用。

Studied present measuring methods" advantages and disadvantages, and presented the necessity and importance of researching propellant transient heat transfer.2.according to 130 and aeronautic 90 rocket projectiles" structure, analysed and acquired physical and mathematical models for propellant transient heat transfer, also designed propellant temperature field simulation units for test.3.acquired discrete transient heat balance equation and temperature calculation program, and gave contrasting curves between experimental temperature values and program calculating temperature values as well as maximum errors and average square root errors between them.4.by programs based on the first class boundary condition, worked out temperature distribution in propellant temperature field simulation units at different time, analysed temperature field distribution law and main elements affecting heat transfer, acquired propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.5.established transient heat transfer mathematical model and temperature calculation program for the third class boundary condition, drew contrasting curves between temperature experimental values and calculation values and gave maximum errors and average square root errors between them, got temperature distribution in the simulation unit at different time and main elements affecting heat conduction, figured out propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.

分析了现有测试方法的优缺点，提出了研究推进剂瞬态导热的必要性和重要性。 2。根据130和航90两种火箭弹的结构，分析得到了推进剂传热的物理模型和数学模型，设计了推进剂温度场模拟实验装置。 3。得到了离散形式的瞬态热平衡方程和温度场计算程序，给出了实验温度与程序计算温度值的对比曲线及其最大偏差与均方差。 4。利用程序求出了第一类边界条件下、不同时刻推进剂温度场模拟装置中的温度分布，分析了温度场的分布规律和影响传热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处的温度时间曲线并给出了两者之间的最大偏差与均方差。 5。建立了第三类边界条件下的瞬态导热数学模型和温度计算程序，求出了温度实测值与计算值的对比曲线并给出了两者之间的最大偏差与均方差，得到了不同时刻温度场模拟装置的温度分布与影响导热的主要因素，求出了推进剂质量加权平均温度和最大肉厚1／2处温度及两者之间的最大偏差与均方差，讨论并确定了能代表130和航90推进剂温度的特征点的位置。

The measuring systems are successfully used in the electromagnetic pulse measurement generated by impulse voltage discharge and switch operation in 500kV substations. Full waveforms of transient electric field, transient magnetic field, transient voltage of high frequency relay channels and low voltage alternative current power during switch operation period have been obtained, and the fast transient pulses in high frequency relay channels and AC power have been caught.

将该套测量系统成功地应用于500kV变电站开关操作产生的电磁脉冲的研究中，得到了开关刀闸操作时暂态电场、磁场、高频通道、交流电压等的完整波形，发现低压交直流电源系统和高频保护通道中存在非常严重的脉冲群干扰，初步解释了变电站二次电源模块经常损坏和高频保护经常误动的原因，提出了加强保护和研究的建议，进一步验证了测量系统的先进性。

The transient transfection efficiency was measured by flow cytometry. The stable transfected cells were screened by G418. Results Electrotransfection had the highest transient transfection efficiency (56.8%), with the most masc clones of stably transfection and the least time taken to form big masc clones (20 days). Cationic polymer mediated transient transfection had the lowest efficiency (1.7%), with the least masc clones and the longest time taken to form the big masc clones (30 days). Cationic liposome transfection had a transient transfection efficiency of 39.9% and took 25 days to form the big masc clones.

结果 电转染有最高的瞬时转染效率(56.8%)，稳定转染得到的阳性克隆最多，且从细胞筛选到扩增至得到阳性大克隆所用的时间也最少（约20d）；用阳离子聚合物瞬时转染率低(1.7%)，稳定筛选同样可以得到阳性大克隆，但是数量很少且从细胞筛选到扩增至阳性大克隆所用的时间也最多（约30d）；阳离子脂质体转染效果居中，瞬时转染率为39.9%，从细胞筛选到扩增至得到阳性大克隆所用的时间约25d。

In this thesis, the methods of surrounding rock masses stability classification on the basis of the geological documentation of muck and the boring parameters of TBM are approached, especially as follows:①The geological documentation of muck and the boring parameters of TBM in the Yellow River Diversion Project.of shanxi province is summarized systematically;②Based on the geological documentation of muck and the boring parameters of TBM, that whether the common methods of surrounding rock masses stability (the methods of regular factor classification) classification are feasible, is carried on the discussion;③According to the corresponding relation of muck and the boring parameters of TBM and the surrounding rock masses stability type, the extension assessment method of tunnel surrounding rock masses stability classification is set up, also the corresponding fortran calculation procedure worked out, and not only rational result in conformity with the reality can be obtained, but also the stability situation of surrounding rock masses in front of the working range can be predicted according to the change of the dependent value in the application instance of Yellow River Diversion Project;④Combining with the application instance of Yellow River Diversion Project, extension assessment method in the application of surrounding rock masses stability classification is compared and verificated in detail by applying fuzzy synthesis method by forefathers, and a certain degree discussion and summary about the application achievement of surrounding rock masses stability classification, which is assessed by extension assessment method and fuzzy synthesis method, are carried on.

本文基于渣料和TBM掘进参数的地质编录提供的地质信息进行了围岩稳定分类方法的探讨，重点进行：①对引黄工程中渣料和TBM掘进参数的地质编录的系统整理；②基于渣料和TBM掘进参数的地质编录获得的地质信息，对常用围岩稳定分类方法是否能够进行围岩稳定分类进行了探讨；③根据渣料和TBM掘进参数与围岩稳定类型的对应关系，应用可拓理论，建立了隧洞围岩稳定分类的可拓评价方法，还编制了相应的fortran计算程序，并在引黄工程的应用实例中不仅取得了与客观实际相符的合理结果，而且根据其关联度值的变化能够预测临近掌子面前方围岩的稳定情况；④结合引黄工程的应用实例运用模糊综合评判方法对可拓评判方法在围岩稳定分类中的应用进行了详细的验证、比较，并对前人在运用可拓学和模糊数学进行岩体稳定评判的应用成果方面，进行了一定的探讨、总结。

Load model is representation of the relationship between the power and bus voltage. Load characteristics of power system have a significant effect on power system analysis of power flow and stability that includes transient stability, voltage stability and dynamic stability. The accurate load characteristics will help engineer to analysis power flow and stability.

中文摘要负载模型可反映负载功率和电压之间的相互关系，电力系统的负载特性对系统负载潮流及稳定度包括暂态稳定度、电压稳定度及动态稳定度的分析皆有著重大的影响，准确的负载特性将有助於电力工程人员在负载潮流与稳定度之模拟分析。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。