查询词典 power source

The charge pump electronic ballast circuit which employs a charging capacitor and a high frequency AC source to implement the power factor correctionhas become an attractive topology for the ballast of the fluorescent lamp.

电荷泵式电子镇流器，采用充电电容和高频交流源，以实现功率因数校正，这已成为荧光灯镇流器中极有吸引力的电路拓扑。

The charge pump electronic ballast circuit which employs a charging capacitor and a high frequency AC source to implement the power factor correctionhas become an attractive topology for the ballast of the fluorescent lamp.

西安无线电二厂，陕西西安710016）摘要：电荷泵式电子镇流器，采用充电电容和高频交流源，以实现功率因数校正，这已成为荧光灯镇流器中极有吸引力的电路拓扑。

Include information of code of source of car of information of transport power information, supply of goods, return trip, carriage special railway line, policy, remover, invite public bidding and car inquiry, content to shed a tool to wait among them.

其中包括运力信息、货源信息、回程车源、运输专线、政策法规、搬家公司、招标信息以及车辆查询、物流工具等。

This approach has the advantages of simple circuit, accurate detection and good robustness. Two kinds of topologies in Active Power Filter have been proposed, including APF based on cascade converter with phase-shifted SPWM technique and APF based on current source multimodular converter with phase-shifted SPWM technique.

本文提出了两种基于相移SPWM技术的并联型有源电力滤波器的拓扑结构：基于相移SPWM级联型变流器的电压源型APF，基于电流型相移SPWM组合变流器的电流源型APF。

From November 12 to 14 in Shanxi held "key industrial province in 2009 the annual coal transportation capacity will need to converge," From the news, Shanxi province plant the request of the Government can no longer take the main source of electricity supply pressure at the local coal on a small kiln, requested the power companies as soon as possible to adjust the structure of coal supply, we must allow for large coal mines to account for more than 50%.

从11月12～14日在山西召开的&2009年度省内重点工业用煤产运需衔接会&上传出消息，山西省政府要求省内的电厂再不能把电煤供应的主要来源压在地方小窑煤上，要求电力企业要尽快调整煤炭供应结构，一定要让大矿供的煤能够占到50%以上。

In recent years, the government strengthened the atmosphere pollution treatement with the greater attention given to environment protection, the ESP system becomes more and more important in Power plants and steel works that use coal as energy source, the SCADA (Supervisory Control And Data Acquisition) system for ESP as the kernel component of ESP system pays an important role in the reliably running of ESP system and improving the dusting efficiency.

近年来，随着我国对环境保护的日益重视，国家加大了大气污染治理的力度，发电厂、钢厂等燃煤企业的电除尘系统的重要性也越来越明显，电除尘SCADA系统作为电除尘的核心组成部分为保证电除尘系统的可靠运行和除尘效率的提高起着极为重要的作用。

Many manufacturers use a by-product gypsum source obtained from coal-burning power plants.

许多制造商都用一种从烧煤的能源厂获得的石膏燃料副产品。

Coal-fired power plants supply two-thirds of China's energy and are its biggest source of air pollution.

燃煤火力发电提供了中国能源的2/3并且是中国空气污染的最大来源。

Since the harmonic spectrum of ac-side phase voltage of PWM rectifier is influenced not only by pulse modulation style, but also by the parameters of close-loop adjustors, a three-phase voltage source inverter controlled by TMS320F2812 has been built to obtain the harmonics purely generated by SVPWM and verify the algorithm. Power analyzer PZ4000 has been adopted to acquire experimental results.

由于PWM整流器交流侧相电压的谐波频谱不仅与脉冲调制方式有关，还受到闭环调节器参数的影响，因此该文搭建了以TMS320F2812为控制核心的三相电压型逆变器系统以得到单纯由SVPWM产生的谐波频谱，并对该算法进行验证。

Compere: One Ge website is born the aigret island Xiamen of Zai beauty, their Li issues a mission, if in small head of a station is one Ge car, we can provide Dong power, the website has the user of nearly 1 million now, embrace the country's biggest source that build a station downloads a center, offer an analysis for Chinese nearly 60 thousand domestic website everyday, besides Lai offers a lot of characteristic to serve, everybody probably already Cai arrives even if Chinese stationmaster stands, rang our applause has He of hooligan of station of Qing China stationmaster us share.

主持人：一个网站诞生在美丽的鹭岛厦门，他们立下使命，如果中小站长是一个小汽车，我们就会提供动力，网站现在有近百万的用户，拥有国内最大的建站源码下载中心，每天为中国近6万家的网站提供分析，除此之外来提供很多特色服务，大家或许都已经猜到就是中国站长站，让我们掌声有请中国站长站阿飞和我们一起分享。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。