结合原理

This subject combines the basic principle of the calculus of variation and and reply and change basic theories of the function according to fracture mechanics, use mechanics, mathematics knowledge to set up corresponding mathematical model, derive out a series of mechanics and mathematics theory formula, work out procedure carry on number value calculate, to include edge crackle round stress intensity factor of component go on, ask, solve.

本课题结合变分法的基本原理并根据断裂力学和复变函数的基本理论，运用力学、数学知识建立相应的数学模型，推导出一系列的力学及数学理论公式，编制程序进行数值计算，对含边缘裂纹圆形构件的应力强度因子进行求解。

I will give a simple introducation from blue-print design, PCB protract to the process of the whole design that combining with software and hardware.

从原理图设计、PCB绘制，到软件、硬件结合最终完成作品设计的整个过程做一个简单的介绍和说明。

Research and Design of Push-Pull Forward and Soft-Switching Circuit

本文结合推挽正激直流变换器和高频脉冲直流环节逆变器的优点，提出了一种适用于低压大电流输入场合的逆变器，并对构成这种逆变器的电路拓扑、SPWM控制策略、稳态原理特性进行了深入的分析研究。

This system has advantages of high automation,high stability,and credibility. measurement ; PVT properties ; refrigerant

本文在对国内外现有流体PVT性质实验系统分析研究的基础上，根据温度、压力等相关参数测量原理和方法，结合流体热物性测试的实际要求和现代测试技

The paper employs the theory of the layout, design and function of the automatization manufacturing system and studies on the practice and process of cylinder of automobile in the Chang An Corp. author improve on the process the JL472Q, JL 474Q and 1L475Q cylinder to make a flexible manufacture line for the three kinds cylinder. The line composes nine facility (five horizontal machine center, two specific machine), two automatic lines. The FMIL have high utilizable ratio, stable throughput, and good reliability and solve the bottleneck in the process the cylinder of automobile. It contends Chang An corporation for enlarging production and entering into the WTO with quickstep.

本文针对长安汽车集团公司JL72Q、JL474Q、JL475Q三种汽车气缸体的加工工艺特点并结合工厂生产实际，对缸体的加工工艺进行了系统的研究改进，依据现代自动化制造系统的规划、设计和运行原理对三种气缸缸体的机械加工柔性自动线进行了总体设计，规划出了一条缸体机械加工柔性自动线，该自动线采用了9台加工设备(其中5台卧式加工中心，2台专用机床)，2条自动线的设计方案，整个柔性加工线设备利用率高、生产能力稳定、可靠性好，解决了企业生产中的发动机气缸体加工的瓶颈问题，适合长安汽车集团企业扩大生产与率先进入WTO战略的需要。

In respect of real-time radioscopy inspection specified in ASME Code （2004）,some highlights of technology, such as the requirements of system components, calibration,written procedure,parameters quantification and so on,are shown.

凸现 ASME 法规（2004）中有关射线实时成像检测的一些技术亮点，如系统特性、校验测试、工艺规程和参数量化等基本要求，并结合射线成像基本原理和工业生产应用实践，作简要评析。

In combining with the example project of Guanjiayu ventilating shaft of Dongshan Coal Mine,the basic principle, exploration ways and data processing of radon measure technique for fire exploration are introduced,which can confirm the position of coal spontaneous combustion fire.

结合东山煤矿观家峪进风井火区治理工程应用实例，介绍测氡探火技术确定煤层自燃火源位置的基本原理、探测方法及数据处理过程等。

Methods:Methods of scale technique,literature research,expertise consultation et al,based on Chinese medicine theory,via conceptualization of sub health and TCM syndrome,operationalization of sub health and TCM syndrome,come into being items,result,foreword,explain,coding,advance survey,the practical value,recension et al,fashion Questionnaire.

根据问卷设计的原理，结合文献研究和专家咨询等方法，并在中医基础理论指导下，通过亚健康以及亚健康中医基本证候概念的确定、操作化，问题与答案的产生，卷首语、填写说明的确定，问卷编码、预调查、信度、效度检验以及修订等过程，设计调查问卷。

In order to overcome this shortcoming, the reciprocity theorem and the method of equivalent edge currents are used in this paper.

为了克服这一缺点，本文采用互易性原理结合等效边缘电磁流方法进行求解。

The composite scattering between dielectric sea surface and a conducting plate above it is calculated by using Physical Optical method and reciprocity theorem. Meanwhile, the dependence of the plate size on the composite scattering field is considered. The Doppler spectrum and the chaotic characteristic for the time series of composite scattering field are analyzed. Finally, artificial neural networks and wavelet analysis are introduced into the study of the sea clutter to realize the purpose of target detection, the factors which affect the detection of the target are discussed and the solutions to these problems are given.

同时利用物理光学近似结合互异性原理计算了介质粗糙海面与其上方导体运动平板的复合散射，考虑了平板尺寸对复合散射场的影响，并对复合散射场时间序列进行了多普勒谱分析和混沌分析，最后将人工神经网络和小波分析引入到海杂波的分析当中，实现了海杂波中目标探测的功能并讨论了影响目标探测功能的因素以及解决这类问题的方法。

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