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In this paper, we introduce the algorithm of Schoof-Elkies-Atkin to compute the order of elliptic curves over finite fields. We give out a fast algorithm to compute the division polynomial f〓 and a primitive point of order 2〓. This paper also gives an improved algorithm in computing elliptic curve scalar multiplication. Using the method of complex multiplication, we find good elliptic curves for use in cryptosystems, and implemented ElGamal public-key scheme based on elliptic curves. As a co-product, we also realized the algorithm to determine primes using Goldwasser-Kilian's theorem. Lastly, the elliptic curve method of integer factorization is discussed. By making some improvement and through properly selected parameters, we successfully factored an integer of 55 digits, which is the product of two 28-digit primes.

本文介绍了计算有限域上椭圆曲线群的阶的Schoof-Elkies-Atkin算法，在具体处理算法过程中，我们给出了计算除多项式f〓的快速算法和寻找2〓阶本原点的快速算法；标量乘法是有关椭圆曲线算法中的最基本运算，本文对[Koe96]中的椭圆曲线标量乘法作了改进，提高了其运算速度；椭圆曲线的参数的选择直接影向到椭圆曲线密码体的安全性，文中利用复乘方法构造了具有良好密码特性的椭圆曲线，并实现了椭圆曲线上ElGamal公钥体制；文中还给出了利用Goldwasser-Kilian定理和椭圆曲线的复乘方法进行素数的确定判别算法；最后讨论了利用椭圆曲线分解整数的方法并进行了某些改进，在PC机上分解了两个28位素数之积的55位整数。

Ceramic is a kind of product with the biggish tolerance and complex surface,which has various product designing and manufacturing technology parameters.

陶瓷是一种宽公差、复杂曲面的产品，产品设计与制造的技术参数繁多。

As the only company of a non-product division full-time training, basic swept almost all the non-product-house training courses in senior management personnel training courses, headquarters management backbone of training courses, new staff training courses, sub - Company marketing director concentrated training co

有故事的女人流金岁月特刊：流金岁月，真的就那么几年，纯粹的岁月不是时时……新版小三，不都是花容月貌每个人，都有婚外情的需求

In the process of product design, innovation is mainly expressed in the process of product conceptual design.

产品的创新性是产品是否具有竞争力的关键因素。

The company insist on:"pople oriented,quality first,honest service "as our market' s tenet,we are participate in the competition of market around home and abroad actively,our product have been sold far away to some countries in Europe,America,Japan,Middle Asia,we supply high quality services with customers,and also cooperate with customer to design different styles and fashion product according to customers' special requirement.we are look forward to cooperating with many manufacturers and develop concertedly the market ,strongly create brands.

本厂以："以人为本，以质取胜，以诚待客"的经营理念，积极参与国内外市场的竞争，产品远销欧洲，美国，日本，中东的国家地区，并为客户提供优质服务，可以按客户要求加工定做。

Concrete machinery to the core technology is based on product research and development SANY extended to excavators, truck cranes and concrete mixer truck in areas such as the formation of advanced product development platform.

以混凝土机械的核心技术为基础，三一重工将产品研发拓展到挖掘机、汽车起重机和混凝土搅拌运输车等领域，形成先进的产品开发平台。

Combined with National Nature Science Fund project"Study on Modular Flexible Machining Cell Oriented Concurrent Design Software Tools", and aimed at Flexible Transfer Line product design for prism type parts, this dissertation systematically analyze the implement principle of computer aided concurrent design for complicated mechanical product.

本文结合国家自然科学基金项目"模块化柔性加工单元并行设计软工具的研究"（编号59575037），以棱体类零件柔性生产线（Flexible Transfer Line，简称FTL）产品设计为研究对象，系统地分析了复杂机械产品计算机辅助并行设计的实施机理，并对以下几方面的关键技术进行了深入地研究： 1。

Aim To determine the role of product data model in the product data management and concurrent engineering.

李冰目的研究产品数据模型在产品数据管理和并行工程中的作用。

Product information sharing is the core of concurrent design of product development.

并行设计的核心是信息共享。

The market competes, it is the competition of the product actually, it is the competition of the content of science and technology that condenses in the product and quality.

市场竞争，实际上是产品的竞争，是凝聚在产品中的科技含量和质量的竞争。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。