对电压无功的调节原理进行了分析。
因此他们对它们的祷告是徒劳无功的。
无功的优化与控制关系到电力企业自身的经济效益。
A reactive power optimization and control system is becoming more and more important for electric power companies.
在一项调查的过程中，有时也许产生徒劳无功的结果。
Wild-goose chases may happen sometimes during an investigation.
他认为人在无限的宇宙里寻找意义是一个徒劳无功的努力。
He sees man's search for meaning in an infinite universe as a fruitless effort.
调相机吸收无功的能力一般为其额定容量的35—40%。
The ability of the condenser to absorb reactive power is generally about 35% - 40% of its rating.
本文分析了电压与无功的关系，提出如何调整电压和无功。
The paper analyzed the relationship between voltage and idle work and provided the method for regulating voltage and idle work.
因此，想从他的著述中找出一个最终答案，必然是徒劳无功的。
Hence it is futile to look for synthesis or a final resolution in his writings.
采用定子磁场定向的控制方法，实现了有功、无功的解耦控制。
By means of field oriented control, the decoupling control of active power, reactive power of the system is realized.
通过以上研究，最终较好的实现了变电站电压无功的综合控制。
Finally, voltage and reactive power integrated control is achieved well through the research.
我要十分感激他们，把那个劳而无功的工作从我的手里拿过去。
I shall be only too grateful to them for taking a very difficult and thankless job off my hands.
从马路上一路走进四合院，我总会产生一种深切的徒劳无功的感觉。
Coming through the high driveway into the quadrangle a sense of abysmal futility always came over me.
无功的氧种类(ROS)被在新陈代谢的相互作用用氧期间产生。
Reactive oxygen species (ROS) are produced during the interaction of metabolism with oxygen.
这一无限历史视角的丧失产生了一种徒劳无功的，被浪费的时间现象。
The loss of the infinite historical perspective generates the phenomenon of unproductive, wasted time.
有源电力滤波器是一种用于抑制谐波、补偿无功的新型电力电子装置。
Active power filter (APF) is a new power electronics device used to restraining harmonics and compensating reactive power.
由于无功服务的特殊性，无功的定价问题比有功定价问题显得相对复杂。
Because of its specialties, the pricing of reactive power is more complex.
有源电力滤波器是一种用于动态抑制谐波，补偿无功的新型电力电子装置。
The active power filter is a new kind of the power electronic plant restraining harmonic and compensating reactive power.
有源电力滤波器是一种用于动态抑制谐波，补偿无功的新型电力电子装置。
Active power filter is a new power electronic plant restraining harmonic and compensating reactive power.
他在《富裕生活》中写道：“它使我们避免了无功的努力或者是错位调整。”
It enabled us to "avoid awkward effort or unwelcome dislocation of life," he wrote in The Affluent Society.
因此本文在三维空间功率理论基础上，推导新的快速补偿谐波和无功的算法。
Therefore, based on the theory of three-dimensional space power, this paper proposed to infer the new fast algorithm to compensate harmonic and reactive power.
在我们积累了足够的准确知识前，任何实际操作都是徒劳无功的，注定会失败。
Until we accumulate enough exact knowledge, any practice is in vain and is bound to fail.
去担心如公司多快会作出招聘决定这样无法去控制的事物是一件徒劳无功的事情。
It is not productive to worry about things you can't control, such as how quickly a company will make a hiring decision.
专家们找到了一些可能影响减肥计划，甚至能令减肥努力徒劳无功的因素，它们是。
Experts identified factors that may affect, or even sabotage, people's many unsung efforts at losing weight. Some of these factors are.
提出一种用晶闸管开关装置串联变压器来改变电容端电压以调节无功的补偿方法。
This paper proposes a method for Var compensation by use a device of thyristor switch series transformer to change the capacitor voltage.
徒劳无功的议程刚刚结束，岛国首脑们多半便已欣然散去，以期可以赶上一两场比赛。
On concluding their fruitless deliberations, the majority of Pacific Island leaders merrily dispersed to catch a game or two.
电力系统中无功的分层平衡，有利于减少输电路径上无功的流动，降低电网传输损耗。
In the power system of reactive power balance layer, to reduce the flow path, reduce the reactive power transmission loss.
自从四月份以来，升值速度已经大大降低，对于阻止投机者来说，这是一个徒劳无功的努力。
Since April the pace of appreciation has been much reduced, in a vain effort to discourage speculators.
使二次侧绕组提取到不含基波无功的谐波电能，并经过变频装置变为可直接利用基频电能。
Therefore, the secondary winding of transformer extracts harmonic energy without fundamental reactive power, which becomes applicable fundamental frequency power via frequency converter.
这个故事告诉我们三件事：为什么人们会感到烦恼，烦恼是徒劳无功的，如何摆脱烦恼。 。
This story teaches us three things: why people worry, the futility of worry, and how to overcome worry.
这个故事告诉我们三件事：为什么人们会感到烦恼，烦恼是徒劳无功的，如何摆脱烦恼。 。
This story teaches us three things: why people worry, the futility of worry, and how to overcome worry.
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