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High frequency and low noise of power device: Local and remote control can be realized and is simple in operation, which can be added the control of time, ampere-hour and temperature as well as PLC, field bus and computer interface.

功率元件工作频率高,不产生噪音。可实现本地和远程控制,操作简便,可增设定时、安时、温度等控制, PLC 或现场总线及计算机接口。

So it is worth to design an audio power amplifier with the features of high power and high efficiency.

因此,设计一种失真度小,输出功率大,效率高的音频功放也有很重要的现实意义。

Then, the sequence voltages of the slack bus is replaced, and finding the positive sequence power flow several times until convergence comes off. Compared with the three-phase Newton-Raphson method, the Jacobian matrix with the proposed algorithm is of much lower order. The computation of finding the negative sequence component from the coupling power is only division arithmetic.

本文算法中修正方程式的雅可比矩阵阶数同单相潮流算法相同,是传统三相潮流算法的1/3,而通过耦合功率求解负序分量的计算,仅仅是简单的除法运算,计算量远远小于高阶矩阵的处理,因而总体上,与传统方法相比,大大降低了计算量。

In this paper, based on the effect of both of them in latitude and time observation, the data of observation of a Danjon astrolabe at the Shanghai Observatory from 1960 to 1978 were analysed with the method of maximum entropy spectral analysis.

本文根据二者对纬度和时间观测结果的影响,用最大熵功率谱方法方析了上海天文台丹容等高仪1960~1978年的观测资料,得到了空间自由章动在纬度和时间资料中引起的周期、振幅分别为P2,1=208平太阳日、A1=0。

The active users are determined by users' channel state information and fairness. To obtain closed form solution for power and rate allocation, the algorithm uses the asymptotic Gaussian convergence characteristics of the packet outage probability.

该算法在调度用户时兼顾用户的信道状态信息和公平性,利用误包率严格近似为高斯随机变量的性质得到传输速率和功率的闭式解。

The company independently developed YQ series of water resistance starter cabinet, GCBK capacitive electric starter motor soft start counter and cabinets, starting current due to small, start-up speed, high power factor, and its performance over conventional frequency counter-min variable resistance starter , anti-electric starter cabinets and counters autotransformer starter compensation, in the operation of general support of the users.

公司自主研发的YQ系列的水电阻起动柜,GCBK电容式电机起动柜及电机软起动柜,因起动电流小,起动速度快,功率因素高,其性能方面都超过常规的频敏变阻起动柜、电抗起动柜和自耦补偿起动柜,在运行中普遍得到用户的好评。

However, one major difficulty is its large Peak to Average Power Ratio.

然而,OFDM的一个主要缺陷是具有高的峰平功率比。

The simulation results show that the vector control system based on this improved scheme has better dynamic and static performance. It solves a lot of problems such as larger error in the MRAS based on the back electromotive force when the motor runs across the zero speed and the instability based on the instantaneous reactive power in the regenerating mode and has high estimating precision.

仿真表明基于该方法的矢量控制系统动静态性能好,能有效解决反电动势模型参考自适应方法在速度过零点辨识误差大以及瞬时无功功率模型参考自适应方法在转速给定为负阶跃时转速不稳定问题,转速估计精度高。

The RSA in this material can be operated with a continuous wave laser of moderate energy.

该材料的反饱和吸收效应可在功率不太高的连续光下操作

Its power class mounting dimdnsions and center height of bedplate are all according to IEC standards and series Y(ip44)three phase asyn-chronous motor and its interchangeability and versatility are good.

YVP系列电动机的功率等级与安装尺寸、机座中心高均符合国际IEC标准,其对应关系与Y系列(IP44)三相异步电动机相一致,互换性通用性强。

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