数学基础

At the beginning the controllable techniques of the converter in the world are reviewed. Its operational principle and internal parameter relation are analyzed. The model of system in different coordinates is presented.

论文中首先回顾了三相变流器控制方式的发展及变化趋势，针对本文的研究对象分析了其工作原理和内部参数间的关系，给出了系统在不同坐标系下的数学模型，为系统的理论分析和实验奠定了基础。

In writing on analysing the tactfulness foundation of quotation method research present situation, make the mathematics model of the optimization quotation problem of power plant, and have given based on rich run to discuss and probability theory beg the method of untying.

文中在分析策略性报价方法研究现状的基础上，提出了电厂优化报价问题的数学模型，并给出了基于博弈论和概率论的求解方法。

Then by means of Taylor series expansion and interval calculation,we can obtain the interval ranges of stress intensity factors.

该方法以区间数学为基础，将不确定参数描述为区间变量；再利用Taylor 级数展开通过区间运算得到应力强度因子的区间范围，从而为工程设计提供可信的数据。

The teaching load is very heavy and the teaching behavior influences the student's mathematical ability very profoundly.

此项微积分教学的工作量不但庞大，而且教学效果的良窳影响学生基础数学能力至为深远。

The initial-boundary value problem of dispersive equation is a kind of mathematical model, in this paper, it has been followed the ways of other scholars and used a new method and got a new difference scheme. It was a three layers ten-point implicit difference schemes.

色散方程的初边值问题是在孤立波这样的物理现象中抽象出来的一类数学模型，在前人构造的众多差分格式的基础上，使用新的构造方法，给出了该问题的三层十，点隐式差分格式。

The relationship of pressure and diameter of tubelike tension bandage is studied and defined through a great deal of test and statistic analysis.

研究圆筒形压力绷带压强与筒径关系，通过大量的测试与数理统计分析，确定二者的数学关系，并在给定的压强与腿部尺寸的基础上，计算得出圆筒绷带编织尺寸，以满足压强要求

With its better-grounded underlying principle, fuzzy assessment lessens the psychological pressure under which assessors work, allows more aspects of communicative competence to be assessed, and results in a more objective description of the testee's oral proficiency.

模糊评估以模糊数学为原理，优点是比精确评分更科学，在评估过程中能减轻测试员的心理压力，能更全面地考察口语交际能力，结果也更客观、更准确。本文建立的模糊评估框架为进一步的理论和实证研究以及建立更加符合实际、更具操作性的评估模型提供了一个基础。

Contains more engineering and physics applications, and more mathematical proofs and theory of partial differential equations, than the first edition.

本书在第1版的基础上增加了偏微分方程在工程和物理学方面的应用，并且提供了更多数学证明和偏微分方程的原理。

Based on researchful results of two former students, we take the influences of thermochemistry reaction, mutual disturb and unsymmetrical instance into account. Secondly, the paper simulates the transient thermal response of projectile according to the simulation software, and discuss the ablation regulation when the projectile is in different initial velocity, in different shape, in different angle of attack condition and in different material condition. Thirdly, the effect on the aerodynamic characteristic and the outer ballistic characteristic after the ablation of hypersonic projectile has been analyzed.

在前面两位师兄研究成果的基础上，研究了超高速弹箭组合体在考虑热化学反应、存在攻角影响下的的气动加烧蚀数学模型；然后对不同条件下的烧蚀过程进行计算，分析和总结出在不同外形和不同材料条件下弹体和弹翼的烧蚀规律；紧接着分析了在不同的烧蚀情况下，它对飞行中弹箭的气动力和外弹道特性的影响，从而为今后的超高速弹箭设计提供指导和帮助。

Because of its strong educational system in mathematics and science, it should thrive in the Information Age.

由于其坚实的数学和科学教育基础，它应该在信息时代有繁荣的发展。

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。