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In this paper the author discusses the theory and practice in building up learning city, and summarizes the current conditions and primary achievement from several concepts about learning city in China.

本文从与学习型城市建设相关的几个概念入手，对中国学习型城市建设的理论架构和实践进行了探讨，总结了目前中国学习型城市建设的现状和取得的初步成就。

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。

This paper discusses maths base of principle of superposition from direction of maths physics and summarizes its application in physics, and points out the suitable range of the principle of superposition.

本文从数学物理的角度讨论了迭加原理的数学基础，概述了迭加原理在物理学中的应用，并指出迭加原理的适用范围。

The second chapter summarizes patent protection and management system of Chinese PRIs.

第三章介绍中国科学院专利保护现状。

In seceion four , this paper summarizes the inflnenee of modern Guangxi-Vietnam border trade on border region ,The positive influences consist of four facts:form of market net accelaration of melting of nationality strengthening of defence and promotion of friendship of chinaand Vietnam .

文章主要从四个方面，即边境地区市场网络、民族融合、国防力量和中越之间传统友谊，论述了桂越边境贸易在这四个方面的积极影响，促进边境地区产生了新的变化。

This paper summarizes the concept of the two phase flow and effect of the two phase flow on the energy property of the propellent .

概述了两相流的概念以及两相流对推进剂能量的贡献和影响。

On the base of analysis, this paper expatiates the birth and development of the sustainable development theory, its basic conception and meanings. It summarizes its basic principles and explains the relationship between the government and sustainable development. Then it points it out that government is the main propellent of sustainable development.

在以上分析的基础上，本文详尽的阐述了可持续发展理论的产生与发展，其基本概念与内涵，归纳出了可持续发展的基本原则，并结合政府的主要公共职能说明了政府与可持续发展战略的关系，指出政府在可持续发展战略实施过程中处于主导地位，是可持续发展战略的主要推动者。

Finally, it summarizes the features of this article, and gives prospective view of the future research.

论文的最后是论文的工作总结以及后续研究方向的进一步展望。

This paper summarizes the appropriate range of some DNA sequences that are commonly used in current pteridophyte molecular phylogenetics, which comprises sequences from three plant genomes (chloroplast, nucleo-tide, and mitochondria), especially focuses on the usage of chloroplast DNA regions.

本文综述了目前蕨类分子系统发育研究中常用的DNA序列分析，它们分别来自叶绿体基因组、核基因组和线粒体基因组，着重阐明叶绿体基因在蕨类分子系统学研究中的应用。

At last, it summarizes this article and hopes that this article can do a pygmy effort for preventing and striking duty crime.

第五部分总结了全文，希望这篇文章的研究能够为我国当前预防和惩治职务犯罪尽绵薄之力。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。