查询词典 trend line

The speed estimation without speed sensor is an important trend of modern AC drive. This thesis has probed several primary algorithm of speed estimation and analyzed emphatically the algorithm of speed estimate based on model reference adaptive system. The results of simulation prove its feasibility.

无速度传感器转速估计是现代交流传动研究的一个重要方向，本文在探讨了几种主要的转速估计方法之后，着重分析了基于模型参考自适应系统的速度辨识算法，并通过仿真证明了该方法的可行性。

According to the developing trend of society and history, the new high-tech enterprise will become primary factor of economic growth in our country.

从社会和历史发展的趋势来看，高新技术企业必将成为我国经济增长的重要因素。

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 artiele take Weng An county event as example and has limited the community event concept and character,and have analysed group event principal character and developing trend,and classification on the community event,and discuss community event function....

本文在分析瓮安事件的基础上，界定了群体性事件的概念、性质；分析了群体性事件的主要特征以及发展趋势，并且对群体性事件进行了分类，对群体性事件的功能进行了阐述。

Principal components and factor analysis can be effectively used to evaluate a port's development trend.

通过主成分分析法可以评价一个港口的综合物流发展水平和潜力。

The principle trend of the equilibrium development in planned economy system, is political stability realized by justice superior and social control; while that of the non-equilibrium development in the market economic system, is realized by efficiency superior for development of the productive forces. One aim of the two is to safeguard and develop socialism welfare and justice, but different in the road selection.

计划经济体制下的均衡发展的政策取向，是通过公平优先达到政治稳定和社会控制，而市场经济体制下的非均衡发展的政策取向，是通过效率优先更快地发展生产力，二者的目的之一都是维护和发展社会主义社会的福利和公正，但存在着路径选择上的差异。

Objective To understand the hereditary and variant characteristics of rubella virus, especially the strains isolated from China, investigating the epidemical trend and variation principle of RV.

目的 阐述风疹病毒的遗传变异规律及分子流行病学特点。

There has been irresistible trend in recent years towards impulse of owning a private car.

传统的思维方式有了显著的变化。

Privatization is a kind of trend all over the world.

民营化是全球的一种趋势。

But to be one running trend, which it will developed a green revolution with technical and pro-environment , reach related industries make a progress and the related produces which is exists Lasting Supply Power problem will be final solve and go into new a stage.

但作为电池技术的一个发展趋势，燃料电池必将带来一场技术与环保的绿色革命，推动其他相关产业迈上一个新台阶，而受电池续航能力所累的产品也将解除束缚，大踏步前进。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48