数学专业英语(1)

数学专业英语

数学专业英语课后答案

2.1数学、方程与比例 词组翻译 1.数学分支branches of mathematics，算数arithmetics，几何学geometry，代数学algebra，三角学trigonometry，高等数学higher mathematics，初等数学elementary mathematics，高等代数higher algebra，数学分析mathematical analysis，函数论function theory，微分方程differential equation 2.命题proposition，公理axiom，公设postulate，定义definition，定理theorem，引理lemma，推论deduction 3.形form，数number，数字numeral，数值numerical value，图形figure，公式formula，符号notation(symbol)，记法/记号sign，图表chart 4.概念conception，相等equality，成立/真true，不成立/不真untrue，等式equation，恒等式identity，条件等式equation of condition，项/术语term，集set，函数function，常数constant，方程equation，线性方程linear equation，二次方程quadratic equation 5.运算operation，加法addition，减法subtraction，乘法multiplication，除法division，证明proof，推理deduction，逻辑推理logical deduction 6.测量土地to measure land，推导定理to deduce theorems，指定的运算indicated operation，获得结论to obtain the conclusions，占据中心地位to occupy the centric place 汉译英 （1）数学来源于人类的社会实践，包括工农业的劳动，商业、军事和科学技术研究等活动。 Mathematics comes from man’s social practice, for example, industrial and agricultural production, commercial activities, military operations and scientific and technological researches. （2）如果没有运用数学，任何一个科学技术分支都不可能正常地发展。 No modern scientific and technological branches could be regularly developed without the application of mathematics. （3）符号在数学中起着非常重要的作用，它常用于表示概念和命题。 Notations are a special and powerful tool of mathematics and are used to express conceptions and propositions very often. （4）17 世纪之前，人们局限于初等数学，即几何、三角和代数，那时只考虑常数。Before 17th century, man confined himself to the elementary mathematics, i. e. , geometry, trigonometry and algebra, in which only the constants were considered. （5）方程与算数的等式不同在于它含有可以参加运算的未知量。 Equation is different from arithmetic identity in that it contains unknown quantity which can join operations. （6）方程又称为条件等式，因为其中的未知量通常只允许取某些特定的值。Equipment is called an equation of condition in that it is true only for certain values of unknown quantities in it. （7）方程很有用，可以用它来解决许多实际应用问题。

数学专业英语论文(含中文版)

Differential Calculus Newton and Leibniz,quite independently of one another,were largely responsible for developing the ideas of integral calculus to the point where hitherto insurmountable problems could be solved by more or less routine methods.The successful accomplishments of these men were primarily due to the fact that they were able to fuse together the integral calculus with the second main branch of calculus,differential calculus. In this article, we give su ?cient conditions for controllability of some partial neutral functional di ?erential equations with in?nite delay. We suppose that the linear part is not necessarily densely de?ned but satis?es the resolvent estimates of the Hille -Yosida theorem. The results are obtained using the integrated semigroups theory. An application is given to illustrate our abstract result. Key words Controllability; integrated semigroup; integral solution; in?nity delay 1 Introduction In this article, we establish a result about controllability to the following class of partial neutral functional di ?erential equations with in?nite delay: 0,) ,()(0≥?? ???∈=++=?? t x xt t F t Cu ADxt Dxt t βφ (1) where the state variable (.)x takes values in a Banach space ).,(E and the control (.)u is given in []0),,,0(2>T U T L ,the Banach space of admissible control functions with U a Banach space. C is a bounded linear operator from U into E, A : D(A) ? E → E is a linear operator on E, B is the phase space of functions mapping (?∞, 0] into E, which will be speci?ed later, D is a bounded linear operator from B into E de?ned by B D D ∈-=????,)0(0 0D is a bounded linear operator from B into E and for each x : (?∞, T ] → E, T > 0, and t ∈ [0, T ], xt represents, as usual, the mapping from (?∞, 0] into E de?ned by ]0,(),()(-∞∈+=θθθt x xt F is an E-valued nonlinear continuous mapping on B ??+. The problem of controllability of linear and nonlinear systems repr esented by ODE in ?nit dimensional space was extensively studied. Many authors extended the controllability concept to in?nite dimensional systems in Banach space with unbounded operators. Up to now, there are a lot of works on this topic, see, for example, [4, 7, 10, 21]. There are many systems that can be written as abstract neutral evolution equations with in?nite delay to study [23]. In recent years, the theory of neutral functional di ?erential equations with in?nite delay in in?nite dimension was deve loped and it is still a ?eld of research (see, for instance, [2, 9, 14, 15] and the references therein). Meanwhile, the controllability problem of such systems was also discussed by many mathematicians, see, for example, [5, 8]. The objective of this article is to discuss the controllability for Eq. (1), where the linear part is supposed to be non-densely de?ned but satis?es the resolvent estimates of the Hille-Yosida theorem. We shall assume conditions that assure global existence and give the su ?cient conditions for controllability of some partial neutral functional di ?erential equations with in?nite delay. The results are obtained using the integrated semigroups theory and Banach ?xed point theorem. Besides, we make use of the notion of integral solution and we do not use the analytic semigroups theory. Treating equations with in?nite delay such as Eq. (1), we need to introduce the phase space B. To avoid repetitions and understand the interesting properties of the phase space, suppose that ).,(B B is a (semi)normed abstract linear space of functions mapping (?∞, 0] into E, and satis?es the following fundamental axioms that were ?rst introduced in [13] and widely discussed

关于数学专业英语课程的研究与探讨

第34卷第10期2017年10月 吉林化工学院学报 JOURNAL OF JILIN INSTITUTE OF CHEMICAL TECHNOLOGY V〇1.34N〇.10 Oct.2017 文章编号：1007-2853(2017) 10-0069-03 关于数学专业英语课程的研究与探讨 许洁 (吉林化工学院理学院，吉林吉林132022) 摘要：通过介绍数学专业英语课程开设目的，结合专业本身的特点对数学专业英语课程进行研究，分析 当前数学专业英语课程在教与学过程中存在的问题，并对相应问题的解决提出思考。希望通过对授课 方法，评价体系等方面的改革不断提高数学专业英语的实用性，培养出适应社会发展需要的专业化 人才。 关键词：数学专业英语;教学方法;评价体系 中图分类号：H319 文献标志码：A D0l：10.16039/https://www.360docs.net/doc/2f18640431.html,22-1249.2017.10.017 随着计算机科学技术的迅速发展，人们进入 了高速发展的信息时代。信息时代拉近了人与人之间的距离，增进了国际间的交流合作。社会生活的信息化、经济的全球化，使英语的重要性日益突出。英语成为许多领域重要的通用语言。绝大多数学科前沿的学术论文都是用英文撰写。许多领域的学术、科技交流会议也以英语作为官方语 言的首选。培养具有国际交流能力的人才势在必行，掌握具有国际交流能力的专业人才又成为高 校培养人才的重中之重。 一、专业英语课程开设的目的 伴随着人类社会进入21世纪，我国的教育也面临着如何进一步与国际接轨的问题。教育部提出了高等学校各专业逐步使用英文教材，培养学生阅读英文版专业文献的能力[1]。为适应人才 培养的需要，高等院校根据各专业的实际情况开 设适应各专业的专业英语、科技外语阅读等课程。通过类似课程的学习使学生增加本专业的专业词汇的英文表达方式。数学，作为古老的学科为适 应新形式下教学改革的需要同样面临着如何与国际接轨的问题。探讨数学专业英语的特点，如何很好的开设这门课程成为很多从事该课程的一线教师关注的热点[2-6]。数学专业英语具有科技英 语的共性、科学内容的客观麵性、表达形式的完整性和简练性要求[7]。数学专业英语作为高等 院校的一门重要课程，是以大学英语为基础，是数学专业的基础课程之一。通过本课程的学习，使学生能够适应国际、国内数学教育的发展，了解本专业的最新发展动态，开拓学生的视野。通过教师讲解，结合学生课后查阅英文资料，培养学生 听、说、写的综合能力，掌握本专业的当前动态和 前沿发展，为进一步的学习、工作打下坚实的 基础。 二、数学专业英语的特点 数学专业英语与许多其他专业的专业英语类似，不能简单的定义为一门专业基础课程或者是 英语课程。数学的专业知识和大学英语课程的基础都是学好数学专业英语的关键。本课程是对于数学专业学生专业英语能力训练和培养的一门重要课程，是对大学高年级学生继公共英语课程之 后的一个重要补充和提高。数学专业英语与大学英语既有区别又有联系。 数学专业英语课程中，数学的专业性十分典 型。数学专业英语以叙述的方式介绍数学的方 法、推导过程及主要结论。其学科本身的特点决 定了其内容通常与特定的时间无关。数学课程或是数学文献中涉及到的结论有时是很久以前给出的，但在叙述的过程中一細现时絲表示。 收稿日期：017-04-05 基金项目：吉林化工学院2016年一般教研项目 作者简介:许洁（1980-)，女，吉林省吉林市人，吉林化工学院副教授，博士，主要从事矩阵代数方面的研究。

数学专业英语课文翻译(吴炯圻)第二章 2.

数学专业英语课文翻译(吴炯圻)第二 章 2. 数学专业英语3—A 符号指示集一组的概念如此广泛利用整个现代数学的认识是所需的所有大学生。集是通过集合中一种抽象方式的东西的数学家谈的一种手段。集，通常用大写字母：A、B、C、进程运行·、X、Y、Z ；小写字母指定元素：a、 b 的c、进程运行·，若x、y z.我们用特殊符号x∈S 意味着x 是S 的一个元素或属于美国的x如果x 不属于S，我们写xS.≠当方便时，我们应指定集的元素显示在括号内；例如，符号表示的积极甚至整数小于10 集{2,468} {2，，进程运行·} 作为显示的所有积极甚至整数集，而三个点等的发生。点的和等等的意思是清楚时，才使用。上市的大括号内的一组成员方法有时称为名册符号。涉及

到另一组的第一次基本概念是平等的集。DEFINITIONOFSETEQUALITY。两组A 和B，据说是平等的如果它们包含完全相同的元素，在这种情况下，我们写A = B。如果其中一套包含在另一个元素，我们说这些集是不平等，我们写 A = B。EXAMPLE1。根据对这一定义，于他们都是构成的这四个整数2，和8 两套{2,468} 和{2,864} 一律平等。因此，当我们用来描述一组的名册符号，元素的显示的顺序无关。动作。集{2,468} 和{2,2,4,4,6,8} 是平等的即使在第二组，每个元素 2 和 4 两次列出。这两组包含的四个要素2,468 和无他人；因此，定义要求我们称之为这些集平等。此示例显示了我们也不坚持名册符号中列出的对象是不同。类似的例子是一组在密西西比州，其值等于{M、我、s、p} 一组单词中的字母，组成四个不同字母M、我、s 和体育3 —B 子集S.从给定的集S，我们

数学专业英语第二版-课文翻译-converted

2.4 整数、有理数与实数 4－A Integers and rational numbers There exist certain subsets of R which are distinguished because they have special properties not shared by all real numbers. In this section we shall discuss such subsets, the integers and the rational numbers. 有一些R 的子集很著名，因为他们具有实数所不具备的特殊性质。在本节我们将讨论这样的子集，整数集和有理数集。 To introduce the positive integers we begin with the number 1, whose existence is guaranteed by Axiom 4. The number 1+1 is denoted by 2, the number 2+1 by 3, and so on. The numbers 1,2,3,…, obtained in this way by repeated addition of 1 are all positive, and they are called the positive integers. 我们从数字 1 开始介绍正整数，公理 4 保证了 1 的存在性。1+1 用2 表示，2+1 用3 表示，以此类推，由 1 重复累加的方式得到的数字 1,2,3，…都是正的，它们被叫做正整数。 Strictly speaking, this description of the positive integers is not entirely complete because we have not explained in detail what we mean by the expressions “and so on”, or “repeated addition of 1”. 严格地说，这种关于正整数的描述是不完整的，因为我们没有详细解释“等等”或者“1的重复累加”的含义。 Although the intuitive meaning of expressions may seem clear, in careful treatment of the real-number system it is necessary to give a more precise definition of the positive integers. There are many ways to do this. One convenient method is to introduce first the notion of an inductive set. 虽然这些说法的直观意思似乎是清楚的，但是在认真处理实数系统时必须给出一个更准确的关于正整数的定义。有很多种方式来给出这个定义，一个简便的方法是先引进归纳集的概念。 DEFINITION OF AN INDUCTIVE SET. A set of real number s is cal led an i n ductiv e set if it has the following two properties: (a) The number 1 is in the set. (b) For every x in the set, the number x+1 is also in the set. For example, R is an inductive set. So is the set . Now we shall define the positive integers to be those real numbers which belong to every inductive set. 现在我们来定义正整数，就是属于每一个归纳集的实数。 Let P d enote t he s et o f a ll p ositive i ntegers. T hen P i s i tself a n i nductive set b ecause (a) i t contains 1, a nd (b) i t c ontains x+1 w henever i t c ontains x. Since the m embers o f P b elong t o e very inductive s et, w e r efer t o P a s t he s mallest i nductive set. 用 P 表示所有正整数的集合。那么 P 本身是一个归纳集，因为其中含 1，满足(a)；只要包含x 就包含x+1, 满足(b)。由于 P 中的元素属于每一个归纳集，因此 P 是最小的归纳集。 This property of P forms the logical basis for a type of reasoning that mathematicians call proof by induction, a detailed discussion of which is given in Part 4 of this introduction.

数学专业英语论文

课文9-B Terminology and notation when we work with a differential equation such as(9.1),it is customary to write y in place of f（x) and y' in place of f'(x)，the higher derivatives being denoted by y"，y'''，etc.Of course ，other letters such as u，v，z，etc.are also used instead of y. By the order of an equation is meant the order of the highest derivatives which appears.For example ,(9.1)is first-order equation which may be written as y'=y.The differential equation ) sin(xy" y x y'3+ =is one of second order. In this chapter we shall begin our study with firs-order equations which can be solved for y' and written as follows: (9.2) y'=f(x,y), Where the expression f(x,y) on the right has various special forms. A defferentiable function y=Y(x) will be called a solution of (9. 2) on an interval I if the function Y and and its derivative Y' satisfy the relation Y'=f[x,Y(x)] For every x in I. The simplest case occurs when f(x,y)is independent of y.In this case , (9.2) becomes (9.3) y'=Q(x), Say, where Q is assumed to be a liven function defined on some interval I. To solve the differential equation(9. 3) means to find a primitive of Q.The Second fundamental theorem of calculus tells us how to do it when Q is continuous on an open interval I. We simply integrate Q and add any constant.Thus，every solution of (9.3) is included in the formula （9.4）y=∫Q(x)dx + C, where C is any constant ( usually called an arbitrary constant of integration). The differential equation(9.3) has infinitely many 课文9—B 术语和符号 当我们在求解像(9.1)式的微分方程时，习惯用y代替f(x)，用y’代替f'(x)，用高阶导数y''和y'''等表示。当然，其他的字母如u,v,z等等，同样可以用来代替y。微分方程和阶数指的是现在其中的高阶导数的阶。例如，（9.1）式是一个一次方程可以写成y'=y。 微分方程 ) s i n(x y" y x y'3+ =是一个二阶的。 在这章我们将会学习到可以求解y'的一阶微分方程。一阶方程可以被写成这样：（9.2）y'=f(x,y), 其中，右边有各个特殊形式表示。如果对于区间I中的每一个x函数y和他的倒数满足 Y'=f[x,Y(x)] 那么可微函数就为（9.2）在区间I中的一个解，最简单的形式是f（x，y）与y无关。在这种情况下，（9.2）式变成了 （9.3）y'=Q(x), 表明，其中Q是假定在区间中的一个给定函数，对于一个给定的函数定义在各个区间I.求解微分方程（9.3）就意味着找到原始的区间Q。第二基本积分定理告诉我们，当Q位于一个连续的开放的区间I 时该怎么做。我们直接对Q积分并加上任意常数。因此，y=∫Q(x)dx + C包含了（9.3）式的所有解 （9.4）y=∫Q(x)dx + C, 其中C为任意常数（通常被称为积分下限的任意常数），微分方程（9.3）有无穷多个解，每个解对应一个C。

数学专业英语(Doc版).10

学专业英语－How to Write Mathematics? How to Write Mathematics? ------ Honesty is the Best Policy The purpose of using good mathematical language is, of course, to make the u nderstanding of the subject easy for the reader, and perhaps even pleasant. The style should be good not in the sense of flashy brilliance, but good in the se nse of perfect unobtrusiveness. The purpose is to smooth the reader’s wanted, not pedantry; understanding, not fuss. The emphasis in the preceding paragraph, while perhaps necessary, might see m to point in an undesirable direction, and I hasten to correct a possible misin terpretation. While avoiding pedantry and fuss, I do not want to avoid rigor an d precision; I believe that these aims are reconcilable. I do not mean to advise a young author to be very so slightly but very very cleverly dishonest and to gloss over difficulties. Sometimes, for instance, there may be no better way t o get a result than a cumbersome computation. In that case it is the author’s duty to carry it out, in public; the he can do to alleviate it is to extend his s ympathy to the reader by some phrase such as “unfortunately the only known proof is the following cumbersome computation.” Here is the sort of the thing I mean by less than complete honesty. At a certa in point, having proudly proved a proposition P, you feel moved to say: “Not e, however, that p does not imply q”, and then, thinking that you’ve done a good expository job, go happily on to other things. Your motives may be per fectly pure, but the reader may feel cheated just the same. If he knew all abo ut the subject, he wouldn’t be reading you; for him the nonimplication is, qui te likely, unsupported. Is it obvious? (Say so.) Will a counterexample be suppl ied later? (Promise it now.) Is it a standard present purposes irrelevant part of the literature? (Give a reference.) Or, horrible dictum, do you merely mean th at you have tried to derive q from p, you failed, and you don’t in fact know whether p implies q? (Confess immediately.) any event: take the reader into y our confidence. There is nothing wrong with often derided “obvious”and “easy to see”, b ut there are certain minimal rules to their use. Surely when you wrote that so mething was obvious, you thought it was. When, a month, or two months, or six months later, you picked up the manuscript and re-read it, did you still thi nk that something was obvious? (A few months’ripening always improves ma nuscripts.) When you explained it to a friend, or to a seminar, was the someth ing at issue accepted as obvious? (Or did someone question it and subside, mu ttering, when you reassured him? Did your assurance demonstration or intimida

数学专业英语第二版的课文翻译

1－A What is mathematics Mathematics comes from man’s social practice, for example, industrial and agricultural production, commercial activities, military operations and scientific and technological researches. And in turn, mathematics serves the practice and plays a great role in all fields. No modern scientific and technological branches could be regularly developed without the application of mathematics. 数学来源于人类的社会实践，比如工农业生产，商业活动，军事行动和科学技术研究。反过来，数学服务于实践，并在各个领域中起着非常重要的作用。没有应用数学，任何一个现在的科技的分支都不能正常发展。From the early need of man came the concepts of numbers and forms. Then, geometry developed out of problems of measuring land , and trigonometry came from problems of surveying . To deal with some more complex practical problems, man established and then solved equation with unknown numbers ,thus algebra occurred. Before 17th century, man confined himself to the elementary mathematics, . , geometry, trigonometry and algebra, in which only the constants are considered. 很早的时候，人类的需要产生了数和形式的概念，接着，测量土地的需要形成了几何，出于测量的需要产生了三角几何，为了处理更复杂的实际问题，人类建立和解决了带未知参数的方程，从而产生了代数学，17世纪前，人类局限于只考虑常数的初等数学，即几何，三角几何和代数。The rapid development of industry in 17th century promoted the progress of economics and technology and required dealing with variable quantities. The leap from constants to variable quantities brought about two new branches of mathematics----analytic geometry and calculus, which belong to the higher mathematics. Now there are many branches in higher mathematics, among which are mathematical analysis, higher algebra, differential equations, function theory and so on. 17世纪工业的快速发展推动了经济技术的进步，从而遇到需要处理变量的问题，从常数带变量的跳跃产生了两个新的数学分支-----解析几何和微积分，他们都属于高等数学，现在高等数学里面有很多分支，其中有数学分析，高等代数，微分方程，函数论等。Mathematicians study conceptions and propositions, Axioms, postulates, definitions and theorems are all propositions. Notations are a special and powerful

数学专业英语

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数学专业英语论文 英文原文：2-12C Some basic principles of combinatorial analysis Many problems in probability theory and in other branches of mathematics can be reduced to problems on counting the number of elements in a finite set. Systematic methods for studying such problems form part of a mathematical discipline known as combinatorial analysis. In this section we digress briefly to discuss some basic ideas in combinatorial analysis that are useful in analyzing some of the more complicated problems of probability theory. If all the elements of a finite set are displayed before us, there is usually no difficulty in counting their total number. More often than not, however, a set is described in a way that makes it impossible or undesirable to display all its elements. For example, we might ask for the total number of distinct bridge hands that can be dealt. Each player is dealt 13 cards from a 52-card deck. The number of possible distinct hands is the same as the number of different subsets of 13 elements that can be formed from a set of 52 elements.Since this number exceeds 635 billion, a direct enumeration of all the possibilities is clearly not the best way to attack this problem; however, it can readily be solved by combinatorial analysis. This problem is a special case of the more general problem of counting the number of distinct subsets of k elements that may be formed from a set of n elements (When we say that a set has n elements,we mean that it has n distinct elements.Such a set is sometimes called an n-element set.),where k n ≥. Let us denote this number by ),(k n f .It has long been known that )1.12( ,),(??? ? ??=k n k n f where, as usual ??? ? ??k n denotes the binomial coefficient, )!(!!k n k n k n -=??? ? ?? In the problem of bridge hands we have 600,559,013,6351352)13,52(=??? ? ??=f different hands that a player can be dealt. There are many methods known for proving )1.12(. A straightforward approach is to form each subset of k elements by choosing the elements one at a time. There are n possibilities for the first choice, 1-n possibilities for the second choice, and )1(--k n possibilities for the kth choice. If we make all possible choices in this