数学

In this paper, we mainly study the controllability for semilinear parabolic equations with various controls.

抛物型方程是自然界热传导过程的数学模型，因而是数学物理中一类重要的方程。

This thesis,starting from working out the arrest points and the infl ection points of the function curves of the grey mathema tical model GM(1:1 )and its residual correction model and residual period model, derives the conditions for empliying these grey models to obtain a higher class of accuracy,thus enabling the user to decide which model should be used in the light of the state of given initial sequency data.

从求得灰色数学模型GM(1.1)及其残差指数修正模型和残差周期修正模型函数曲线的驻点与拐点入手，导出使用这些灰色模型取得较高精度的条件，让使用者可依据初始序列数据的态势决定采用哪种数学模型，并且在结果未揭示以前便可大体上估计到拟合精度是否令人满意。

In this thesis, the mathematic model of servo system is set up, the contour error in straight line and circular interpolation movement on the duplex servo-system is analyzed, and the method to raise the contour accuracy of the movement track is put forward.

本论文建立了数控伺服进给系统的数学模型，对双轴进给系统在作直线和圆弧插补运动时形成的轮廓误差进行了数学分析，并指出了提高试验台运动轨迹轮廓精度的方法。

Its theoretic foundation is integration geometry, random theory of set, topology, modern probability, algebra, theory of set, graph theory, and so on.

其最基本的数学理论基础是积分几何和随机集论，同时还涉及到拓扑学、现代概率论、近代代数、集合论、图论等一系列数学分支。

So, how to begin dug sexology to review in education of classroom of elementary school maths, where is the mathematical dug ability that develops a student?

那么，在小学数学课堂教学中如何开展探究性学习，培养学生的数学探究能力呢？

This Paper mainly introduces the set uP. of the mathematic model, the mathematic choice of simulation algorithm, the content of the computer simulat...

本文主要介绍了连续铸钢凝固传热过程数学模型的建立、仿真算法的数学抉择、连续铸钢凝固传热过程计算机仿真软件包的主要内容及该软件包应用于实际的结果分析等。

The first method was single factor fuzzy synthesis assessment method and the second one was multilevel fuzzy assessment method.

第一种数学评价法采用较为简单的单因素模糊综合评价法，另一种采用多级模糊数学评价法。

Among them, the nonlinear impulsive problems and singular boundary problems arise from a lot of branches of applied mathematics and physics, which are at present active fields in analysis mathematics.

其中，非线性脉冲问题和奇异边值问题来源于应用数学和物理的多个分支，是目前分析数学中研究较为活跃的领域。

Mixed monotone operator; Singular two-point boundary value problem; Generalized e-concave operator; Generalized e-convex operator; Mixed monotone multivalued operator; Fixed point

基础科学，数学，数学分析混合单调算子；奇异两点边值问题；广义e-凹算子；广义e-凸算子；混合单调多值算子；不动点

The problems seem randomly selected and the explanations, while kid-friendly, are far from concrete: If Ralphie were as tall as a redwood…his big sister could land a hook shot on top of the Washington Monument or If a chocolate bar covered the mall…each almond would be the size of a blimp.

作者大卫具有出色的数学功底，他在书中列举了很多稀奇古怪的例子，以此来解释物体的相对大小和比例问题；插图作者詹姆士生动有趣的绘画让这些令人费解的数学概念变得简单而有趣。

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。