基本原理

Firstly, we describe the fundamental theory and types of the electrooptical modulators in detail, and make an introduction to the means used to analyze the modulators, especially, to the Schwartz-Christoffel conformal mapping technique.

本文首先详细的阐述了电光调制器的基本原理和类型，就研究调制器的方法作了介绍，特别是对本文采用的研究方法―施瓦兹保角变换的基本原理作了具体的分析。

The present paper proposed one kind of numerical control single-phase inversion structure, in detail elaborated the system parameter design, the rectification work basic principle of work, the contravariant basic principle and the SPWM sine pulse width modulation.

本论文提出了一种数字控制的单相逆变器结构，详细论述了系统的参数设计，整流工作的基本工作原理，逆变的基本原理及SPWM正弦脉冲宽度调制。

The presentpaper proposed one kind of numerical control single-phase inversionstructure, in detail elaborated the system parameter design, therectification work basic principle of work, the contravariant basicprinciple and the SPWM sine pulse width modulation.

本论文提出了一种数字控制的单相逆变器结构，详细论述了系统的参数设计，整流工作的基本工作原理，逆变的基本原理及SPWM正弦脉冲宽度调制。

The main content of this thesis includes six parts. First of all, it is a comprehensive systematic introduction about RSA algorithm including the present application situation and principle of RSA algorithm----producing big prime numbers and secret keys, the encryption arithmetic for information and the decryption for secret information, which establish the theory foundation for achieving concrete; secondly, it introduces some basic conception of RSA digital signature and theory of digital signature realizing process; thirdly, it introduces the basic principle of MD5 algorithm; fourthly, it states design and realization of RSA digital signature in detail. The main modules includes producing RSA secret keys, implementation of RSA encryption algorithm and decryption algorithm, producing message digest and realizing digital signature and verification by RSA; the fifth, it carries on testing entirely, analyzing and improving for this system;The sixth, it analyses the security of RSA digital signature and points out the development direction of RSA digital signature.

本文主要研究的内容包括：第一，对RSA算法进行了全面系统的介绍，包括RSA算法的应用现状和原理—大素数的产生、密钥对的产生、对明文的加密运算和密文的解密运算，为具体实现打下了理论基础；第二，介绍了RSA数字签名的一些基本概念和数字签名的理论实现过程；第三，对MD5算法基本原理的介绍；第四，详述了RSA数字签名的设计与实现，主要实现的模块包括RSA密钥的产生，RSA加密算法和解密算法的实现，消息摘要MD的生成以及利用RSA算法实现数字签名和签名的验证；第五，对该系统进行了整体的测试和分析改进；第六，分析了RSA数字签名的安全性，指出了RSA数字签名的发展方向。

The content of this course mainly include the feature, equipment, principle and application of high efficient welding method, for example, activating flux assisted TIG welding, narrow gap TIG welding, hot wire TIG welding, oscillating arc TIG welding, plasma TIG welding tandem MIG welding, hybrid arc welding, surface tension transfer MIG welding, oscillating arc MIG welding, mixed-gas MIG welding, two wire or more SAW welding, friction stir welding and laser-MIG hybrid welding, etc.

主要内容涉及到助焊剂TIG焊技术、窄间隙TIG焊技术、热丝TIG焊技术、摆动电弧TIG焊技术、等离子弧焊技术的基本原理、设备、特点和应用。双丝焊MIG方法、复合电弧技术、表面张力过渡、摆动电弧MIG、交流MIG焊、混合气体MIG焊的原理、特点、设备和应用。双丝以及多丝埋弧焊技术、窄间隙埋弧焊技术的原理、特点和应用。搅拌摩擦焊以及激光电弧复合焊接的原理、特点、设备、应用范围。

Because we mainly involve visual fields of medical science , have placed more contents on the development in the field of medical image of visual technology and argumentation used. Second part It is the visual technology knowledge, the generalization in such respects as the basic principle , basic functions, function store and three-dimensional animation technology to OpenGL ,etc. The realization of the system using OpenGL functions finish that three-dimension demonstration. The third part It is number value that calculate knowledge, three-dimension rebuild technology is it is it is it punish to fit to go on to need, the research of interpolator technology that cant leave, So this part has quoted the Hermite function principle , define cubic Hermite function to begin, calculate the differential coefficient among them draws cubic spline again.

由于我们主要是涉及医学可视化领域，所以将更多的内容放在了可视化技术在医学影像领域的发展与应用的论述；第二部分是可视化技术方面的知识，主要对 OpenGL 的基本原理、基本功能、函数库及三维动画技术等方面的概括，在系统实现时就是通过调用 OpenGL 函数库实现三维显示的；第三部分是数值计算方面的知识，三维重建技术需要进行拟合处理，离不开插值技术的研究，所以这一部分从埃尔米特函数原理开始讨论，引入三次埃尔米特函数，进一步计算时又引用三次样条函数。

This course enables the students to understand bio-properties and their applications, also master the following focuses: basic theory of biochemistry, microstructure and properties of inartificial biomaterials, bioadaptability and selecting rules of biomaterials, microstructure, preparation principles and applications of current biomedical materials, and survey for biomimetic materials science, which lay a foundation for students to research and develop biomedical materials in future.

本课程的教学目的在于使学生了解材料的生物性能和作为生物医用的适应性，掌握生物化学基本原理，天然生物材料基本结构和性能，材料的生物适应性和生物医学材料选用原则，现有生物医学材料的结构、制备原理和应用情况，以及仿生材料学概况，为学生今后从事生物医学材料研究开发奠定必要基础。

The basic principle of unequal exchange can be described simply as "buying cheap and selling dear", in such a way that a commodity or asset is bought either: 1 below its real value, and sold at a higher value, or 2 at its real value, but sold above its real value, or 3 above its real value, and sold at a price even higher than its already inflated acquisition cost e.g.

不等价交换的基本原理被简单地描述为"低价买进，高价卖出"不等价交换的基本原理被简单地描述为"低价买进，高价卖出"，按照这样的方式，一件商品或者资产可以：照这样的方式，一件商品或者资产可以： 1低于其真实价值买进，以更高的价格卖出，或低于其真实价值买进，以更高的价格卖出， 2按其真实价值买进，但以高于其真实价值的价格卖出，或按其真实价值买进，但以高于其真实价值的价格卖出， 3按高于其真实价值的价格买进，以甚至高于其已经上升的购置成本按高于其真实价值的价格买进，例如股市卖出。

The theory of KEM for simple soils limit analysis is dissertated in detail. Based on this, KEM has been developed to complicated soils limit analysis for the first time. Appropriate functions and variables of different engineering practice are presented, and the minimization technique for functions is adopted the conjugate gradient method.

在详细论述了土体极限分析KEM的基本原理、对均质土体极限分析KEM研究的基础上，根据KEM的基本原理，在国内首次将KEM扩展应用到复杂土体的极限分析中，根据工程问题的实际情况找出了合适的KEM土体极限分析目标函数和自变量，对目标函数的优化方法采用了变尺度法。

Chapter three (the methods of generating chaotic signal and its applications): In this chapter firstly the mechanism that a simple kinetic system, subsection linear map system, can generate chaotic phenomena is affirmed, the characteristics of correlation function of the chaotic signal generated by this system are simulated, on this basis a simple applicable method for generating chaotic signal is given; secondly some typical circuits generating chaotic signal are designed, also use operational amplifier to design a third -order autonomous circuit with chaotic dynamics. The basic mechanism and typical structures of chaos in the application of communication are introduced systematically and a simple method is provided for generating pseudo random code signal; At last Chaotic signal is applied into the analysis of system characteristic.

第三章(混沌信号产生方法及其应用)首先针对一类简单动力学系统——分段线性映射系统能够产生混沌现象的机理及由该系统所产生的混沌信号的自协方差函数特点进行了证明和计算机仿真，提出了软件产生混沌信号的一种实用方法；其次分析讨论了几种能够产生混沌信号的典型混沌电路，提出了用运算放大器与阻容元件实现三阶自治混沌电路的基本原理；概述了混沌在通信领域中应用的基本原理和典型结构，提出了产生伪随机码信号的一种简单方法；最后将混沌信号用于系统的特性分析中。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。