及电路

We made the light absorption coefficient measurement system with Nuclepore filter which were used to collected aerosol particles. The system has one laser beam which is split into two laser beam, one being information light which transfer through glass pipe, the other being reference light which transfer directly through atmosphere. so the measurement system could well eliminate the effect of all kinds of measurement errors which were caused by optical ullage and circuit noises and power fluction.

本测量系统利用核孔过滤膜采集气溶胶粒子，测量系统的光路由同一光束分为两路光组成，一路为信号光，通过光管传输，另一路为参考光，通过信号光和参考光相比很好地消除了测量系统中由于光管损耗、电路放大倍数的差异及光功率起伏等因素所引入的误差对吸收系数测量的影响。

This paper introduces the use of ultra-high frequency transmitter and receiver chip U2741B constitute U3741BM wireless remote control system and the application circuit, covering the latest wireless remote control system design.

详细说明：本文介绍了采用超高频发射芯片U2741B及接收芯片U3741BM构成的无线遥控系统和应用电路，涵盖了目前最新型无线遥控系统的设计思路。

Is a high-tech enterprise in Henan Province, China Heat Treatment Association, relying on university scientific research strength, the basis of modern power electronics theory, with Zhengzhou University Motorcycle Factory United attachment to the strict requirements of the production process of "X" series new frequency, high frequency, ultrahigh frequency induction heating equipment, the main circuit using IGBT, MOSFET and other new types of power devices, to integrated, modular, as the basic characteristic of independent innovation with new output transformer, equipment greatly enhance the power, energy consumption significantly reduced, the reliability of the maintenance-free development, and by domestic users widely welcomed and has been exported to Southeast Asia and the European Union and many other countries and regions.

郑州科创电子有限公司是河南省高新技术企业、中国热处理协会会员，依托高校科研实力，依据现代电力电子理论，与郑州大学摩托车附件厂联合，以严格的工艺要求生产的"X"系列新型中频、高频、超高频感应加热设备，主电路采用IGBT、MOSFET等新型功率器件，以集成化、模块化为基本特征，配以自主创新的新型输出变压器，设备功率大幅度提升，能耗大幅度降低，可靠性向免维护发展，受到国内用户的广泛欢迎，并已出口到东南亚及欧盟等众多国家和地区。

Flexibleconvenient:It is smalllight,and can be clutched to the beltbe arried by otherparts of body.It also utilizes magnet power to be attracted to the surfce of metal objects,or hangsfixedly on the underprop.

防水性能：外壳防护按IP66设计，可抵抗高压水炮直射、暴雨喷淋和海浪溅射智能保护：灯内配有电池过放，过充及短路保护电路，有效保护电池，延长使用寿命。

The principle analysis of error and undesired signal has been done at great length, and relevant way to solve it has been adopted in the paper, too.

同时本文对电路系统中存在的干扰信号及引入的误差作了细致的理论分析，并采取了相关的办法进行解决。

This device utilizes DC servo motor and fine precision feedback variable resistor and closed loop control so it has the advantage of fine static control and low mechanical noise.

本装置利用DC伺服电机配以高精度反馈电位器及闭环控制电路，具有较高的定位精度，较小的机械噪声，全部拍片过程通过微机自动控制，操作简捷，使用方

This paper studies an optimal design method of centering and tolerancing which is called Control Variate method.

引言 Monte Carl。方法是电路参数中心及容差设计的一种基本方法〔，，2J，但它计算量大，统计精度低。

According to above equations, the equivalent circuits and vector diagram in dq axis are plotted out and mathematical models described by state space in dq axis are constructed.

根据上述方程，绘出dq轴的等值电路及矢量图，得到状态空间描述的dq轴数学模型。

On the base of studying application methods and relative information of the relative chips, the paper designed the system hardware ,including LCD interface designing、video gathering chip and its peripheral circuit designing、FPGA chip and other module interface designing; 3、The LCD controller module、video in controller module、configuration initialized module of the video image decode chip、FPGA and program of module interface were all compiled and debugged in the paper. 4、The whole system debugging was carried through, and the video image data storage and displaying on LCD screen was carried out in the paper. The paper first designed the system frame, then designed hardware platform according to the system frame and then analyzed it、debugged it, finally,compiled the module code and debugged the whole system to achieve system requirements.

本文具体研究工作主要体现在以下几个方面： 1分析了的嵌入式视频图像采集、处理与LCD显示系统的总体需求，设计了基于NIOSⅡ的嵌入式系统总体架构； 2在学习相关芯片的具体应用方法和相关知识的基础上，设计了系统的硬件，包括LCD接口设计、视频采集芯片及外围电路设计、FPGA芯片和其他模块接口主板设计； 3编写并调试了LCD控制器模块、视频输入控制器模块、视频解码芯片初始化配置模块、FPGA和各个模块接口程序； 4进行了整个系统的联调，完成了视频图像数据存储并通过LCD显示；本文首先建立了系统架构，然后根据系统架构进行硬件平台的设计并对硬件平台进行分析和调试，最后编写个模块代码并完成系统联合调试实现系统要求。

The voltage amplification multiple,the input resistance and the output resistance are the most elementary three targets in the Alternating Magnifying circuit,which has a process of quite complicated analysis and solution.

电压放大倍数、输入及输出电阻是交流放大电路中最基本的三种指标，其分析和求解过程比较繁琐。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐