查询词典 efficient point

This paper first analyses and summarizes the ststus quo and evolution trend of encryption, some common used cryptograph are introduced, including the algorithms used in symmetric cryptosystem and asymmetirc cryptosystem. We describe the theory of each algorithms and compare the elliptic curve cryptosystem with the other two asymmetric cryptosystems to show the advantages of this algorithm. Second, the principle of ECC is discussed, including the math foundation of ECC, basic conception of elliptic curves, constructiong idea of ECC, operation on the elliptic curve and so on. Third, the current attacks of ECC were analyzed deeply, and an algorithm based on limited prime number field was constructed. We analyzed its realizability in theory, and implement it by using certain function of MIRACL software package. Latter half in this paper, the implementation model of a simple elliptic curve encryption system which based on GF has been introduced. The paper also put a deep analysis on the algorithm of point addition and point multiplication.

本文首先对密码技术的发展现状及其发展趋势进行了分析和综述，详细的介绍了私钥密码系统和公钥密码系统的发展，说明各种算法的原理和优缺点，并给出了一些典型的密码体制的简要分析，重点将椭圆曲线算法与其它几种公钥密码算法比较，说明椭圆曲线算法的优势；其次，探讨了椭圆曲线密码体制的原理，包括椭圆曲线密码的数学基础、基本概念、椭圆曲线密码体制的构造思想等问题；第三作者对椭圆曲线的攻击现状作了详细的分析，针对所使用的大素数域F_p，设计了素数域上安全椭圆曲线产生的算法，从理论上做了可实施性分析，从软件上做了具体实现；在本文的后半部分，提出了一个简单的基于有限素数域上的椭圆曲线加密方按算实现模型，并对SECES中设计的点加和点乘运算进行了深入分析。

Point cloud models using discrete points as primitive element have many advantages such as data simple structure, compact space, and ability to express complicated surface in detail. However point cloud models usually can not be used directly.

点云模型以离散采样点为基元的几何模型，具有数据结构简单、存储空间紧凑，能够表达任意复杂表面细节，是造型所有表达方式中最自由的一种。

According to the obtained characteristics of focal points and principal planes, using the expressions of focal point, focal plane, focal length, principal point, and principal plane of geodesic lenses, the geometry graphic imaging formation principles of geodesic lenses are developed to get the object-image-relation of geodesic lenses .

利用短程透镜焦点、焦平面、焦距、主点、主平面等的表达式，根据短程透镜在大口径范围内理想聚焦，主平面为以焦点为圆心、以焦距为半径、在原点相切的两个圆弧等性质，推导出了短程透镜物像关系的作图法求取原则。

The principal point of this research is to understand the managerial items of ecological engineering of the river ecological engineering through the proprietor's a point of view.

本研究主要针对河川水域生态工程，以管者角探究河川水域生态工程生命周期由规划、设计、施工至维护等阶段之管项目。

The principle of the main circuit, choice of the control parameters, choice of the control algorithm and the principle of point-by-point integration method are first introduced in this paper.

论文首先介绍了逆变主电路的原理、控制参量的选择、控制算法的选择，以及焊接电流、电压的逐点积分检测原理。

China deliciosus deliciosus Museum for display of Chinese history and the development of the industry, promote Chinese culture has a long deliciosus of great practical significance 1, deliciosus ----- deliciosus Science Museum Science Museum is a museum Core deliciosus, where the soul from the scientific point of view, to the universal audience deliciosus knowledge, deliciosus is rich in value, is a gift of nature The treasure of humanity, from a scientific point of view, the adoption of specimens, models, three-dimensional landscape, pictures, videos, interactive multi-media technology to display the way to create a lively, and the pro-intellectual context, so that viewers feel lovely natural life, Alas .

中国菇菌博物馆对于展示中国菇菌行业的发展历史、弘扬中国悠久的菇菌文化具有重要的现实意义 1、菇菌科学馆-----菇菌科学馆是整个菇菌博物馆的核心、灵魂所在，从科普的角度，向观众普及菇菌的知识，菇菌有着丰富的利用价值，是大自然赐予人类的瑰宝，从科学的角度出发，通过标本、模型、立体造景、图片、影片、多媒体技术等互动展示手法，营造了一个生动、亲和的知性情境，让观众感受自然生命可爱、可叹之处。

Genetic algorithm optimization process can be seen as algorithms in the process of constant cycle of viable domain random, using the results of previous sampling probability distribution on the target point estimates, and then based on an estimate of the projected distribution of a sample point.

遗传算法优化的过程，可以看作算法在循环过程中不断对可行域进行随机抽样，利用前面抽样的结果对目标点的概率分布进行估计，然后根据估计出的分布推算下一次的抽样点。

When asked to point out Mr Pandit's most visible attributes, friends and foes point to his sharp mind and calm, professorial manner.

当被要求指出潘迪特最显著的特质时，他的朋友和对手都认为是敏捷的思维，冷静、有学者气的行为方式。

Business is a profit-making organization, its starting point and end point is profit.

企业是营利性组织，其出发点和归宿是获利。

This paper extends the solution methods for 2-D projective transformation matrix from 4 points corresponding to variety combinations of points and lines corresponding, such as 4 points, 4 lines, 1 point and 3 lines, 3 lines and 1 point, and 2 points and 2 lines, etc.

该文把求解2-D射影变换矩阵的方法从单纯的四点对应扩展到多种组合形式的四元素对应当中，如：4点、4线、3点1线、3线1点和2点2线等。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。