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In this paper, we present a frequency conversion electromotor system organized by voltage vector transducer and induction-motor.

本文研究了用电压矢量变频器和感应电动机构成的变频电动机系统。

The GaAs, InP-based III-V compound semiconductors, which are known as their wide band-gaps, direct-band transition, high photoelectric conversion efficiency and high saturated electron drift velocity and mobility, become increasingly important and have been widely used in microelectronics and optoelectronics.

以GaAs，InP为主Ⅲ-V族化合物半导体材料具有很宽的带隙，大都为直接跃迁型能带，光电转换效率较高，以及具有很高的饱和电子漂移速度和迁移率。

Nuclear lifetime shift of charged atom, due to lack of internal conversion or electron capture transition, is analyzed.

分析了带电原子由于缺少内转换或电子俘获跃迁引起的核寿命的变化。

This high voltage electrostatic precipitation controller has 7 channels of analog input,2 channels of analog output, 12 digital inputs and 16 digital outputs. The analog input includes primary current, secondary current, primary voltage, secondary voltage, etc. Controller uses MAX 187 as the A/D converter, which ensure the sampling speed and the conversion precision in the same time. The processor unit is RCM2250 module. Rabit 2000 processor, a 128K SRAM and a 256K Flash Rom are integrated in RCM2250, which improves the performance of pricipitation controller. MAX504 is used to produce the 4~20mA current output.

模拟量输入采集的信号有升压变压器一次电流、一次电压、二次电流、二次电压等，采用12位逐次比较式A/D转换器MAX187，兼顾采样速率和转换精度；中央处理单元采用以8位嵌入式处理器Rabbit2000为基础的RCM2250模块，外扩128KSRAM和256K Flash ROM，内部资源丰富，提高了控制器的整体性能；模拟量输出采用内带基准源的10位电压输出数模转换器MAX504，实现了标准4～20mA电流信号输出；控制器通过控制算法在相应开关量点上输出可控硅的触发脉冲。

Introduced reducing basic electrical bill,enhancing power factor,increasing voltage rank,eliminating high energy consumption equipment,rearranged production by using the difference electrovalence with peak,plane and vale,used frequency conversion control,adopted new electricity saving measure and electricity saving technology so on.

介绍了降低基本电费、提高功率因数、提高电压等级、淘汰高能耗设备、利用电价的峰平谷差价安排生产、使用变频控制、采用新型节电技术等节电措施。

The results show that tacit knowledge conversion is the key of the elevating of the absorption capacity and Technical capacity.

研究结果表明，在技术转移中，对技术知识的消化吸收和技术能力提升的关键在于技术转移中隐性知识的转化。

Because the coupling condition of NNGFM arises from the net current continuity imposed at the volume element interfaces, the relatively complex conversion formulation for partial current continuity condition of NGFM is unnecessary when applying G. E. T., and computation time is saved. The coefficient matrix of the coupled equations is tridiagonal, so it can be solved by forward elimination and backward substitution method.

NNGFM的基准校验及在大庆200MW核供热堆(NHR-200)上的应用表明，NNGFM计算精度和速度与第三类边界条件格林函数节块法NGFM〓相当，在相同精度下速度比CITATION能快1000倍；NNGFM给出的本征值、功率分布较NNGFM误差能减少一半以上，为更精确计算工作期、卡棒当量提供了条件。

Emery cloth specifications 1.4 meters * 50 (100) m, can be used for processing conversion Belt | page-round and other Coated Abrasives Products.

砂布规格1.4米*50(100)米，可用于加工转换砂带|页轮等各种涂附磨具产品。

Users can be produced in Hebei and Jiangsu emery cloth folder such conversion price per square meter price and our price comparison will find Lianhua license folder emery cloth in terms of price and quality than similar products have significant advantages.

用户可以把河北江苏所产的这类夹砂布价格折算为每平方米价格与我方价格进行比较，会发现联华牌夹砂布在价格和质量上都比同类产品有显著的优势。

And the emulsifier dosage is found to be the most important factor to the stability and monomer conversion.

并且得出乳化剂用量是影响体系稳定性及单体转化率的主要因素。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。