功

Energy conversion, water level, distribution and variation of depression cones during artesian and pumping processes are analyzed.

从抽水设备作功、消耗能量的角度，分析了自流和抽水过程中的能量转化、水位与压降漏斗的分布和变化规律。

I did not know what to draw: I was terrible at arts and crafts!

我不知道该怎麼画：我的画功可是极差的！

This article introduces the selection of relative reactor value of filter X% and its relation to external performance of filter. The selection among parallel capacitor, dissonances filter and assonance filter based on the environment are discussed deeply. The relation between filter parameter and engineering design are once more discussed. Finally, how to coordinate the functions of harmonics and reactive power compensation is argued.

本文介绍了滤波器的相对电抗值X%的选择，以及X%和滤波器外部性能的关系，并深入讨论了如何根据不同场合分别选用并联电容器、失谐滤波器或调谐滤波器的问题，也再次讨论了滤波器参数和工程设计的关系，最后讨论了如何协调谐波和无功的补偿功能。

These approaches have disadvantages that have too many assumptive conditions, low optimization ability, and don' t consider some questions such as reactive power compensation.

这种方法假设条件较多，寻优能力不强，且对一些问题如无功补偿未加考虑，受个人经验影响比较大。

The evaporation fields of metal atoms in the STM configuration have been calculated on the base of the binding energy of the atom on the tip, the total ionization energy of the atom, surface work function, the atomic radius and tip-sample distance.

本文的理论计算表明所需的外加电场强度决定于针尖原子的结合能，原子总的离化能，表面功函数，原子直径以及针尖和样品间距等。

A new cophase power supply system is designed by combining the active filter,V/x connection and autotransformer.

通过以检测并得到的同相综合补偿电流为参考，控制有源滤波器消除三相不平衡，并滤除谐波和无功。

Both the static and dynamic load models are applied in this thesis and the autotransformer starters, static var compensators and VVVF inverters are installed to reduce the current and voltage drop during the motor starting.

文中以暂态稳定度分析模拟大型马达直接启动与加载过程，更考虑使用自耦变压器降压及装置静态虚功补偿器与变压变频启动法来降低启动电流与电压降。

The average power is the work performed divided by the time required for the performance.

平均功率是所做的功除以做功所需的时间。

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。

A new harmonic harmonic and reactive current detection method and a harmonic current detection method base on bandpass filter are introduced in this thesis.

提出两种新的检测方法，检测谐波及无功电流的改进算法和只检测谐波的基于数字带通滤波的检测算法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。