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This paper introduces the real number domain and limited domain of the definition of Elliptic Curves, it introduces the basic principles of Diffie-Hellman key exchange in detail which bases on the definition of Elliptic Curve Cryptosystem, and the methods of implementation which makes use of Elliptic Curve. It analysis the advantages and disadvatages of the Diffie-Hellman key exchange technology , and gives a worthwhile improvement in the same time.

本文介绍了在实数域和有限域中椭圆曲线的基本定义，然后以椭圆曲线的基本定义为基础，详细论述了基于椭圆曲线密码的 Diffie-Hellman 密钥交换的基本原理及利用椭圆曲线实现密钥交换的方法，分析了Diffie-Hellman 密钥交换技术的优缺点，并给出了值得改进的地方。

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。

Double-U curves of laser welding mode transition have been obtained, which can be used to determine the process parameters of the three mentioned welding processes.

标 签 激光焊接深熔焊热导焊焊接模式转变 laser welding deep penetration welding heat conduction welding welding mode transition

Focusing on the doubtable results and abnormal stress-strain curves in the tensile test of high grade line pipe body,the effect on test results of sample preparation process was analyzed,and it is considered that strain aging was the main reason caused pipe body tensile test result abnormal.

针对高钢级输送管管体拉伸性能试验中发现的异常值和异常曲线，分析了试样制备过程对试验结果的影响，认为应变时效是造成管体拉伸试验结果异常的主要原因。

The higher the electric charge quantity of the counter ion is, the higher the DST curves is.

且电性相反的无机盐离子的电荷数越高，DST曲线也越高。

By making a thorough study of WSGB curves, the author acquires two main results, i.e., the transformation formula from Bernstein basis to WSGB basis and the construction of the dual functionals for WSGB basis functions.

利用特殊多项式的分解与展开，推导出从Bernstein基函数到WSGB基函数的转换公式。 2。构造出WSGB基函数的对偶泛函，并应用WSGB基函数的对偶泛函，得到另一种方法实现WSGB曲线与Bézier曲线的互相转化。

For this purposewe need to develop some new methods and new techniques.For example we studythe properties of the"centroid curve"and the"auxiliary curve",and identify twoplanes in which these two curves are defined respectively;we also use the relationshipbetween the"centroid curve"and its"dual curve".

为此需要发展一些新技巧和新方法，例如研究由Abel积分之比定义的"质心曲线"和"辅助曲线"的几何性质，并把这两条在不同平面上定义的曲线放在同一个坐标系中考虑，或把"质心曲线"与其"对偶曲线"联系起来考虑。

The spring constants of the cantilever were calibrated according to the Cleveland method,and the conversion from the original data to the force-distance or force/radius-distance curves was obtained with satisfactory results referring to the Ducker\'s classical paper.

采用Cleveland方法对悬臂的弹性常数进行了标(来源：Aecb4BCb4论文网www.abclunwen.com)定，将原始的力-位移曲线数据转化为力-距离曲线或力/半径-距离曲线，并将实验结果与Ducker经典论文进行了对照。

In fact,the road curves eastwards although lt looks straight

虽然这条路看上去是直的，实际上它是向东弯的。

In the fabrication of diffractive optics elements and semiconductor, it is demonstrated that an initial edger can expand into smooth curves and the surface motion in different local place is not identical.

在制作衍射光学元件以及半导体加工的刻蚀工艺中，刻蚀产生的表面面形随刻蚀时间的延长而产生动态的形变。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。