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With the popular of low power VS studio light, we lanuch high power VSD digital video flash.. High power VSD digital video flash has sophisticated digital technology LCD digital display screen. When working, LCD screen reveals the current modeling lamp brightness value, flashlight power value, photocell working state, beeper working state, anti-redeye gear, and flash using times and current voltage. These functions make users understand the functions of their products.

基于VS小功能影室闪光灯的畅销，公司推出较大功率数码影室闪光灯大VS，大VS采用尖端数码技术LCD数码显示屏，工作时显示当前造型灯泡亮度调节值、闪光功率调节值、光敏管工作状态、蜂鸣器工作状态、防红眼档位，并首创了闪光灯使用次数和电压显示功能，使用户更加容易地理解自己的产品的功能。

The rising power of Japan alarmed the United States and the European powers. In order not to be threatened, the United States invited 8 countries to attend a conference in Washington in 1921, and later signed the 'Four-Power Pact','Five-Power Pact' and 'Nine-Power Pact'. The main objectives of these were to stop the naval race and to maintain a new order in East Asia and in the Pacific region, so as to avoid international conflicts.

日本崛起为世界强国，令美国及欧洲列强大为震惊，为了免受威胁，美国遂於1921 年邀请其他8国出席华盛顿召开的会议，其后签订了《四国公约》、《五国公约》及《九国公约》，目的是停止海军军备竞赛、稳定东亚及太平洋的新秩序，以及避免国际间的衡突。

This paper analyzes the influence of TCSC on the power frequency fault component protection including directional negative/zero sequence power relay, power frequency fault component distance relay, and directional power frequency fault component relay.

摘 要 分析了TCSC 对故障分量保护包括负序功率方向保护、工频故障分量距离保护及工频故障分量方向保护的影响，认为：与常规串联补偿线路上的保护相比，在TCSC线路上故障分量保护的性能不会降低。

And then, they, how to upgrade the technical capability of inverter welding power supply by bringing the dominance of digital control into play fully, and how to realize the soft-switching of power semiconductor devices in the full-load range of inverter welding power supply by making the digital control cooperation with power converter closely, are set forth.

在介绍数字化控制焊接逆变电源内涵和发展历程的基础上，阐述了如何充分发挥数字化控制的优势，全面提升焊接逆变电源的工艺性能，以及如何通过数字化控制和功率变换电路的紧密配合，实现焊接逆变电源的全负载范围功率器件软开关。

It has been obtained by analysis that for ultra-high power electric arc furnace using scrap charging the relation formula between rating capacity of transformer Pn and parameters- electric power consumption W, transformer power utilization ratio C 2, total power o...

经分析得出以废钢为原料的超高功率电弧炉变压器额定容量Pn kVA与吨钢电耗W、变压器功率利用率C2 、总通电时间ton、出钢量G之间的关系式为：Pn =(W·G·6 0 )(ton·cosφ·C2 )，同时给出了二次电压的确定方法。

In recent years he has long dedicated himself in the research and development of power system automation and his main research orientation includes intelligent protection of power system, ground selector in extinction coil ground system, net cable ranging, international standard of data transmission in power system, field data transmission server, signal processing in power system and DSP real-time operating.

近年来，一直从事电力系统自动化相关课题的研究开发，主要内容有电力系统智能化保护的研究、消弧线圈接地系统的接地选线的研究、配网电缆测距的研究、电力系统数据传输国际标准的研究、现场数据传输服务器的研究、电力系统信号处理的研究、DSP实时操作系统的研究等。

The main products of different colors for the sections of high-power LED spotlights (1W-15W), full-color high-power LED spotlights, colored sections of high-power LED (0.5W-100W), full-color high-power LED, various colors and ultra-high bright LED (white, blue, green, red, yellow), with backlight LED, helmet-shaped | straw hat type LED, piranha LED, the series of LED lighting lamps, LED flashlights and LED lighting products, OEM processing.

主要生产产品为各款各色大功率LED射灯（1W-15W），全彩大功率LED射灯，各款各色大功率LED(0.5W-100W)、全彩大功率LED，各款各色超高亮LED，背光源用LED、钢盔形|草帽型LED，食人鱼LED、各系列LED灯具灯饰，LED手电筒和LED照明产品的OEM加工等。

Along with the electric power electronic technology's development and the innovation, cause the switching power supply technology to innovate unceasingly, this cost point of inversion to the low output electric power end migration, this has provided the widespread development opportunities day by day for the switching power supply.

随着电力电子技术的发展和创新，使得开关电源技术在不断地创新，这一成本反转点日益向低输出电力端移动，这为开关电源提供了广泛的发展空间。

Along with the electric power electronic technology development and the innovation, causes the switching power supply technology in to innovate unceasingly, this cost point of inversion to the low output electric power end migration, this has provided the widespread development space day by day for the switching power supply.

随着电力电子技术的发展和创新，使得开关电源技术在不断地创新，这一成本反转点日益向低输出电力端移动，这为开关电源提供了广泛的发展空间。

Input Power Factor Correction: The rectifier shall be power factor corrected so as to maintain an input power factor of 0.98 lagging to unity at all load levels to ensure generator compatibility and avoid reflected harmonics from disturbing loads sharing the utility power.

UPS模块的设计须可使之作为双变换和在线反向输送系统在下列模式下正常工作。A。正常模式：逆变器须可不断向临界负载输电。整流器/电池充电器须从交流电源获取电能并向逆变器供电，同时以浮动方式给电池充电。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。