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Electric power ergograph is a load or device of absorbing power, which mainly is used of measuring power for middling torque.

电力测功机是常用的负载与吸功设备，主要用来对中等大小的扭矩测功。

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

The main reason: l, resin version exposure time; 2, there is a small, contrast－polarity film dust, is not clear; 3, bakeout resin and improper heat bituminization;?aa brushlelss version cvscc low resin, flush long, provincial and municipal governments, too deep, version 5, on the mechanism of cards and membership cards when pressure regulation inappropriate.

次给来因： l、树脂版曝平工夫不敷； 2、底片反不差小，有灰雾、不澄辉； 3、烘烤树脂版以及冷固化办理不妥； 4、刷树脂版时水温矮，冲洗工夫不幼，刷毛功软，刷版功浅； 5、上机制卡和会员卡制息时不张力功大，调度不安妥。

Numerical simulations were carried out to study the effect of reversible work and viscous dissipation on the heat transfer characteristics of compressible fluid flow in microtubes.

利用数值方法讨论了压力功和粘性耗散对微细光滑管内可压缩流动换热特性的影响，得出以下结论：微细管内 Ec沿管长是变化的，仅依据入口处的 Ec对压力功及粘性耗散的作用进行取舍是不确切的；等热流及等壁温换热条件下的计算结果显示，在入口 Ma及长径比较大时，考虑压力功及粘性耗散时得出的 N u要小于常规尺度管的理论值，在等壁温情况下，甚至出现了热流方向发生变化的情况

This product include many kinds of measurement,monitoring,warining,diaplay,communication function,it can measure four quadrant reactive whole fundamental wave and time-sharing fundamental waveelectric quantity;can measure forward and reverse of the active and reactive'smaximal demand and time-sharing demand;can measure each kind of power submultiple,active power,reactive power,apparent power,and so on;can measure and record each kind of pressure loss,current loss and

本产品集各种计量、监控、报警、显示、通讯功能于一身，能计量四象限无功总基波电量及分时基波电量；能计量正反向有功和无功总最大需量及分时最大需量；能测量各相功率因数、有功功率、无功功率、视在功率等；能检测并记录各相失压、失流及三相全失压等事件；能实现远程和红外抄表、编程、监测和校准；也是电力负荷管理系统的配套终端产品。

Red sworn in at an early age al Zhangjiakou 17 subglottic Health Science show, to be specializing in Health, Wenwuquancai, take along his son Gong, Gong horsewhip, reactive posture to the audience to leave an excellent impression.

金兰红自幼拜在张家口十七生门下学戏，专攻须生，文武全才，他的捎子功、马鞭功、身段功给观众留下极好的印象。

Based on the definition of technical work and the application of this term, this thesis discusses the inappropriateness of this definition and the misunderstanding caused by introducing this term into the engineering thermodynamics.

针对技术功定义式方面存在的不足及某些因引用技术功而带来的错误观点，论述了技术功这一概念的不合理性。

Huntcapacitor compensation is simple and economic, but it can not follow the change of inductive loadin system, it can not achieve dynamic compensation of reactive power.

VC可以根据电网中无功功率的状况进行无功补偿，但是，在实际应用中SVC离不开具有时滞性的大容量储能元件，不能做到瞬时无功控制。

The paper introduces an improved harmonic and reactive current detecting method based on there-phase reactive current using instantaneous reactive power theory. By using matlab, simulation model is built, and the results show that this model can exactly detect harmonic and reactive current in time and it is feasible in DSP system.

本文在三相瞬时无功功率理论的基础提出了一种改进的单相无功电流检测算法，并建立了仿真模型，仿真结果表明：该算法可以及时、准确地检测出三相电路中的谐波电流和无功电流，同时也验证了此算法在DSP系统中的可行性。

Secondly, the instantaneous reactive power theory and it' s application to reactive power control and detection are introduced.

其次，论文还介绍了瞬时无功功率理论及其在无功控制和无功检测方面的应用。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。