Objective: To evaluate the clinical application of power harmonic imaging in the liver space occupying lesions.
目的：了解能量谐波成像对肝脏占位病变的应用价值。
The digital harmonic detecting method based on this kind of filter can be used in any kind of power harmonic compensation system.
基于此滤波器设计的数字谐波检测方法可用于任何一种电力系统的谐波补偿装置中。
Its operation characteristics and possible problems, such as power harmonic and system stability, are widely studied in the whole world.
其运行特性以及可能存在的电力谐波、系统稳定性等一系列问题是人们广泛关注的课题。
Objective:To evaluate the application of contrast enhanced power harmonic imaging in hepatic artery embolization of hepatocellular carcinoma.
目的：探讨能量谐波成像声学造影在肝动脉栓塞治疗肝癌中的应用价值。
The digital first-harmonic detecting method based on this kind of filter can be used in anyone power harmonic compensation system and microcomputer relay protection system.
此滤波器设计的数字基波检测方法可用于任何一种电力系统的谐波补偿和微机继电保护系统中。
Through analyzing the principle of a parallel hybrid active power filter (HAPF) which is currently suitable for filtering high power harmonic source, a new control approach is proposed.
对现有的适合于大容量滤波场合的并联混合有源滤波器原理进行了分析。
Hybrid active power filter combined by APF and PPF, learning from both their strong points to offset their weaknesses, can be applied for high power harmonic control and reactive power compensation.
由APF和PPF组合构成的混合型有源电力滤波器可使二者取长补短，实现大功率下谐波抑制和无功补偿。
This paper presents four-phase transmission harmonic current detecting method based on instantaneous reactive power theory.
该文提出了基于瞬时无功功率理论的四相输电谐波电流检测方法。
The harmonic problems, such as distorting supply voltage, decreasing power factor, increasing energy loss, interfering with communication systems etc. are discussed in the part one.
第一部分讨论各种谐波问题，如使供电电压畸变，降低功率因数，增加能量损耗，干扰通讯系统等。
The power converters and other nonlinear loads "inject" the harmonic current into the power systems and cause a series of problems.
电力变流器和其他非线性负荷向电力系统“注入”谐波电流，引起一系列问题。
In this paper, we divided the double frequency crystal into numerous small double frequency units and derived the harmonic power and the double frequency efficiency in each unit.
本文中将倍频晶体分割成无数多个小倍频单元，并导出每个倍频单元中的谐波功率与倍频效率。
Harmonic is the most general phenomenon in power system. And harmonic is the main index of power quality.
谐波是目前电力系统中存在的最普遍现象，是电能质量的主要指标。
Speed regulation system using cascade control method with thyristor is a low-cost system, but the classic system has some shortages, such as low power factor, serious harmonic pollution and etc.
晶闸管串级调速系统是一种廉价、简易的调速系统，但是传统串调系统存在着诸如功率因数低、谐波污染严重等弊端。
This paper presents an intelligence test set built by microcomputer technics to monitor and measure the harmonic and surge voltages in the power network and source, on-line and with a real time.
本文提出利用微机技术构造一种在线实时监视和测量电网、电源客观存在的谐波电压和浪涌电压的智能测试仪。
How to consider harmonic suppression and power factor compensation comprehensively?
谐波治理及功率因素补偿如何综合考虑？
This paper is focused on a shunt active filter based on detection of harmonic voltage to attenuate harmonic propagation in a power distribution network and its installation site selection.
本文着重论述了基于电压检测的并联型有源滤波器在放射状配电网谐波抑制中的应用及其安装点的选择。
The harmonic comes from power system side, which is caused mainly by exciting current of the large capacity transformer besides the nonlinear loads.
认为谐波源来自系统侧，除了非线性负荷外，主要是由大型电力变压器激磁电流所造成。
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。
Several methods of measuring harmonic and reactive power current are introduced and compared in this paper.
本文介绍了常用的几种谐波和无功电流检测方法，并进行了比较。
Active power filter is used for dynamic harmonic suppressing and compensation reactive current, which can effectively improve power network quality.
有源电力滤波器用于动态抑制谐波和补偿无功，可以有效地改善电网质量。
A method of current detect and control for the new active power filter (APF) is presented, which has the ability of canceling harmonic and compensating reactive power at the same time.
提出了一种新型的有源电力滤波器电流检测和控制方法，在补偿谐波电流的同时还可以进行无功补偿。
The key of active power filter harmonic detection is the design of digital low-pass filter.
有源电力滤波器谐波检测中数字低通滤波器的设计是关键。
Active power filter is a new 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。
A systematic concept for the online measuring and analysis of power network harmonic is presented.
提出了电力网络在线谐波测量分析的新系统构架思想。
Motor Drive ICs, to be one of the important branches of the applications of SPIC, have symbolized the harmonic combination of the Controlled IC and Power IC within a single chip.
光碟机马达驱动芯片作为功率集成电路的一个重要分支，充分体现了控制集成电路与功率器件在单一芯片上的有机结合。
Active filters have been used to solve the problem of more and more serious reactive power and harmonic pollution to power systems.
有源滤波器在为解决日益严重的无功和谐波污染问题方面可发挥有效作用。
Active filters have been used to solve the problem of more and more serious reactive power and harmonic pollution to power systems.
有源滤波器在为解决日益严重的无功和谐波污染问题方面可发挥有效作用。
应用推荐