有效功率

In order to optimize performances of shunt active power filter of harmonic compensation, attenuation ratio for switching ripple, stability and power losses, an improved LCL filter topology was presented based on the analysis of the frequency characteristics of the LCL filter, in which a switching-ripple shunt branch and a series-inductor were adopted to the damping resistor to reduce the power losses dramatically.

为了使并联有源滤波器谐波电流补偿性能、开关纹波衰减率、系统稳定性和功率损耗等方面性能得到系统的折中和优化，提出了一种改进型LCL滤波器拓扑，该结构充分利用了LCL滤波器的频率特性，在阻尼电阻两端引入开关纹波谐振分流支路，同时在阻尼电阻上串联一小电感，有效的减少了阻尼电阻的损耗而不改变系统的静态和动态性能。

You will develop practical leadership approaches and explore effective ways to integrate your high-powered career with your personal life.

您将制定切实可行的领导方式，探索有效途径，结合个人生活的高功率的职业生涯。

In order to refine a method for defence against at least one attack made by means of differential power analysis on at least one hyperelliptic cryptosystem, in particular at least one hyperelliptic public key cryptosystem, which is given by at least one hyperelliptic curve of any genus over a finite field in a first group, where the hyperelliptic curve is given by at least one co-efficient, so that an essential contribution can be made towards an efficient and secure implementation of the hyperelliptic cryptosystem, it is proposed that the hyperelliptic curve and/or at least one element of the first group, in particular at least one in particular reduced divisor and/or at least one intermediate result of a scalar multiplication, is randomised.

为了改进用于防御在至少一个超椭圆密码系统中、特别是在至少一个超椭圆公共密钥密码系统中通过微分功率分析作出的至少一个攻击的方法，该超椭圆公共密钥密码系统是通过在第一组中有限域中任何种类的至少一个超椭圆曲线给出的，其中超椭圆曲线由至少一个系数给出，以使得可以对于超椭圆密码系统的有效而安全的实施方案作出重要的贡献，提出将超椭圆曲线和/或第一组的至少一个元素、特别是至少一个特定的减小的除数和/或标量乘法的至少一个中间结果进行随机化。

Based on the compensate admittance model of Steinmetz theory a method is put forward which use instantaneous values of load current and voltage to denote it. The simulations and practical application in the design of SVC model have shown that the proposed method is very effective, accurate, and with fast response performance.

本文基于不平衡负荷的平衡化原理(即Steinmetz原理)的补偿导纳模型，采用负荷电流电压瞬时值采样的方法补偿无功功率，并将该方法应用于SVC样机的设计，结果表明，它们是快速有效和准确的，具有实际的工程应用价值。

The power supply can acquire real time online voltage signal of electric network and input into inverting system; generate synchronous signal and effective value of amplitude signal, then become SPWM pulse by wave generating chip SA4828. High degree sinus and good anti-disturbance performed power supply inverting can be also realized.

该电源可以在线实时采集电网电压送入逆变系统，实时产生同步信号和幅值有效值信号，通过波形产生芯片SA4828实时产生和采样电压同频同步且幅值可调的正弦脉宽调制脉冲，并采用开关线性复合功率变换技术，实现高正弦度和强抗负载扰动性能的电源逆变。

Using Q-V Lissajous figure method,the effect of exciting voltage peak and dielectric thickness on the main discharge parameters were studied.

研究表明：增大激励电压峰值VP-P、减小介质厚度ld可提高放电功率P、单周期电荷传输量Q、气隙有效电场强度Eg和气隙折合电场强度E/n。

To solve this problem, based on the concept of graph theory we give a few models and arithmetic designs of virtual backbone in the environment of different application, and propose the corresponding routing mechanism with these virtual backbones. The major achievements are outlined as follows:The state of host's power or the time of host's online plays an important role in keeping stability of a virtual backbone. With a view to this feature, the paper introduces a simple and efficient heuristic algorithm for calculating the virtual backbone by seeking a minimum connected dominating set with maximal weight. The maximality of the weight-based choice of backbone nodes guarantees that the most suitable nodes have been chosen for the role of backbone nodes so that they can properly coordinate all the other nodes and keep stability of the virtual backbone in the network.

为了解决这个问题，本文利用网络图论中的一些理论，在不同的应用环境下给出几种虚拟骨干网的模型、构建及基于稳定性和节能的算法设计，并针对这些骨干网提出相应的分层路由机制，主要研究内容和贡献如下：考虑到主机的功率大小和在线时间长短对虚拟骨干中心的相对稳固性的影响，提出用基于极大权的最小连通支配集模拟虚拟骨干网；并给出其数学模型和相应的启发式算法，确保了性能强的主机担任骨干节点；通过优化规则确保骨干网的极小性，有效地减小了控制分组转发开销；最后进行了仿真验证。

Methods An high efficiency microwave radar transmitter was refit to act as the microwave resource,an microwave power densimeter was independently developed to detect microWave intensity;the hypergravity enviorment was simulated by using the centrifuge;the low atmospheric pressure environment was founded by refitting the animal low pressure oxygen cabin.

高功率微波武器在未来战争中，特别是在空战和海战中，对装备的破坏和人员的杀伤将发挥"杀手锏"的作用［56］。微波辐射的热效应和非热效应对机体的影响是复杂而广泛的，如同水源污染，大气污染和噪音污染一样，亟待进行深入研究和有效治理。目前国内外虽有不少关于超重环境和低气压环境以及微波辐射对机体影响的单因素研究报道［79］，但尚未见有微波辐射对处于超重或低气压环境下机体协同影响的报道。

The algorithm has overcome some problems of traditional algorithm such as more constraint conditions, depending prior knowledge, calculation complexity and noise susceptibility, and can be applied into the different restored image, and effectively overcomes the difficulties to determine noise-signal power ratio of Wiener filtering.

该算法利用微粒群算法的快速搜索能力和模拟退火算法良好的全局收敛性能寻找最佳复原图像，克服了传统的图像复原方法存在较多约束条件、依赖先验知识、计算求解复杂和对噪声十分敏感等不足，能应用于不同类型退化图像的复原，并能有效地解决经典维纳滤波算法噪信功率比难以确定的问题。

Methods to rotor of centrifugal compressor"s condition monitoring and fault diagnosis are summed up. Peak-to-peak value is an essential reference value of centrifugal compressor"s condition monitoring, which is easy to implementation in practice. On the other hand, according to fault diagnosis, power spectrum and axis obit also works. The direction of eddyis gained from full spectrum, which is vital in fault diagnosis. In a word, to make sure make an exact conclusion, different method should be put in used.

总结了离心式压缩机转子振动的监测和诊断的方法：在压缩机的状态监测的方面，峰—峰值是其主要的手段，实践证明其实现过程非常简单而且非常有效；而对于故障诊断，常用的功率谱分析和轴心轨迹都有一定的作用，全谱可以判断转子的进动方向，所以在分析过程中可以综合以上多种方法，能更加明确故障原因。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。