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based on the introduction of the merit and shortcoming and the analysis of the generate methods of the main random sequences,we propose a new method which is based on the substitution and recurrence structure,and the method is implemented by fpga.the generated sequences by this method not only can pass the test of the fips 140-2 standard,but also have high performance:long period,high linear complexity,good correlation function value and high generation speed,it can be used widely in information security system and so on.

摘 要：在介绍了现有随机序列的优缺点以及分析随机序列主要产生方法的基础上，提出了一种基于循环替换原理的伪随机序列产生方法，并用fpga加以实现。该方法产生的伪随机序列完全符合fips140-2标准，并具有周期长、线性复杂度高、相关性好以及产生时间短的特性，能广泛应用于信息安全等系统中。

They are :(1) The generalization of mathematical methods;(2) The mathematical method of formulization;(3) The proof of construction;(4) The introduction of algebraic symbols.

在宋元数学中，出现一些新的思想、方法和理论，主要有：(1)数学方法的一般化；(2)程序化的数学方法；(3)构造性的证明；(4)代数符号的引入。

In the second part,we have mainly discussed the error es-timates of the numerical methods for solving ill-posed problem,including the error estimate of finite-dimensional regulariza-tion method in Chapter 5,and the error estimate of regulariza-tion-spline method for solving Fredholm integral equation ofthe first kind.

在第二部分，我们主要讨论了不适定问题数值方法的误差估计，包括有限维正则化方法求解不适定问题的误差估计以及用样条正则化方法求解第一类Fredholm积分方程的误差估计，两者均是目前还未有的结果。

This article first described frequency changer's development process, proposed the PWM velocity modulation method's superiority, had pointed out the future PWM velocity modulation method's prospects for development, the spot will leave has studied the PWM velocity modulation method the significance.

本文首先描述了变频器的发展历程，提出了PWM调速方法的优势，指出了未来PWM调速方法的发展前景，点出了研究PWM调速方法的意义。

This paper presents a numerical simulant solution of a scatheless measurement of helium pressure in fuel rod by measuring clad temperature indirectly based on the principle that helium has different heat transfer characteristics at different pressure.

用数值模拟的方法对一种用温度测量进行燃料棒内氦气压力无损检测的方法进行了模拟计算，该方法的基本原理是氦气在不同压力下具有不同的传热特性。

The paper uses two-dimensional difference method to develop a code named RODTRAN to calculate the transient two-dimensional temperature distribution within the fuel rod.

用数值模拟的方法对一种用温度测量进行燃料棒内氦气压力无损检测的方法进行了模拟计算，该方法的基本原理是氦气在不同压力下具有不同的传热特性。

It is stated systematically in the thesis the methods theories and measuring principle of all kinds of geostress determination technology. In particular the four methods recommended in 1987 by the committee of test method of the International Society of Rock Mechanics, i.e. two over-coring methods of strain relief in boreholes, hydraulic fracturing method and stress furbish measurement which measures the surface stress.

本文较为系统地、全面地介绍了当前国内外通用的各种地应力测量方法的理论、测量原理；特别就国际岩石力学学会试验方法委员会于1987年推荐的4种地应力测定方法(钻孔孔径变形测量法、钻孔孔壁应变测量法、水压致裂法以及测量岩体表面应力的应力恢复测量法)作了较为详细的叙述。

In this paper,taking advantage of some properties of Gamma function,we get the explicit solution. Some simulation results are also given in this paper. In chapter three, we discuss the problem under censored data in three circumstances.

一直以来，对Weibull分布参数的矩估计都是采用数值方法求解，本文利用Gamma函数的一些性质，得到了估计的显式解，并从理论和数值模拟说明此种方法相比其它方法的优越性。

This algorithm not only holds the consistent of bounded constraints but also has nice global and local suplinear convergence property. At the same time, this algorithm is easy to realize and its structure is simple.

考虑到电力系统固有的弱耦合特性，受传统解耦最优潮流方法的启示，在所提出的新Newton 型方法的基础上，本文又设计了一类分解方法。

By comparing the results from this method with those from Hahn's, it is shown that the former is better than the latter.

通过用本文的方法所得的结果与Hahn方法的结果相比较，说明用本文提出的方法能获得更好的结果。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。