材料力学英文课件

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第一篇:材料力学英文课件

材料力学的研究对象主要是棒状材料,如杆、梁、轴等。对于桁架结构的问题在结构力学中讨论,板壳结构的问题在弹性力学中讨论。以下是小编为您整理的材料力学英文课件相关资料,欢迎阅读!

材料力学英文课件

材料力学定义

固体力学的一个分支,研究结构构件和机械零件承载能力的基础学科。其基本任务是:将工程结构和机械中的简单构件简化为一维杆件,计算杆中的应力、变形并研究杆的稳定性,以保证结构能承受预定的载荷;选择适当的材料、截面形状和尺寸,以便设计出既安全又经济的结构构件和机械零件。

在结构承受载荷或机械传递运动时,为保证各构件或机械零件能正常工作,构件和零件必须符合如下要求:①不发生断裂,即具有足够的强度;②构件所产生的弹性变形应不超出工程上允许的范围,即具有足够的刚度;③在原有形状下的平衡应是稳定平衡,也就是构件不会失去稳定性。对强度、刚度和稳定性这三方面的要求,有时统称为“强度要求”,而材料力学在这三方面对构件所进行的计算和试验,统称为强度计算和强度试验。

为了确保设计安全,通常要求多用材料和用高质量材料;而为了使设计符合经济原则,又要求少用材料和用廉价材料。材料力学的目的之一就在于为合理地解决这一矛盾,为实现既安全又经济的设计提供理论依据和计算方法。

材料力学课程

课程简介

材料力学课程是一门用以培养学生在工程检验与设计中有关力学方面设计与计算能力的技术基础课,本课程主要研究工程结构中构件的承载能力问题。通过材料力学的学习,能够对构件的强度、刚度和稳定性问题具有明确的基本概念,必要的基础知识,比较熟练的计算能力,一定的分析能力和初步的实践能力。

材料力学课程是高等工科院校中土木工程专业一门主干专业课程。在教学过程中要综合运用先修课程中所学到的有关知识与技能,结合各种实践教学环节,进行土木工程毕业生所需的基本训练,为学生进一步学习有关后续专业课程和有目的从事工程检验与设计工作打下基础。因此材料力学课程在土木工程专业的教学计划中占有重要的地位和作用。

课程目标

材料力学是由基础理论课过度到专业课程的技术基础课。通过该课程的学习,要求学生对杆件的强度、刚度和稳定性问题具有明确的基本概念、必要的基础知识、比较熟练的计算能力、一定的分析能力和初步的实验能力。

教学内容及要求

第一章 绪论及基本概念(2课时)

内容:材料力学的任务和研究对象;变形固体的基本假设;内力、截面法;应力的概念;线应变和剪应变;杆件变形的基本形式。

重点讲解:内力、应力和应变的概念和胡克定律。介绍本课程重点内容及学习方法。第二章 轴向拉伸与压缩(6课时)

内容:轴向拉伸和压缩的基本概念和实例;截面法、轴力和轴力图;直杆横截面和斜截面上的应力,最大剪切应力;低碳钢和铸铁的拉伸试验及拉伸时材料的力学性质;低碳钢和铸铁的压缩试验及压缩时材料的力学性质;许用应力,强度条件;圣维南原理;轴向拉伸和压缩时的变形;应变能、比能;应力集中的概念。

重点讲解轴向拉(压)杆内力、应力以及强度计算的概念,截面法在求解拉(压)杆内力中的具体应用。详细介绍材料在拉伸与压缩时的力学性能。重点讲解轴向拉(压)杆的应变和变形计算

公式。对拉压应变能作一般性介绍。对斜截面上的应力、应力集中的概念及连接部分的强度计算作一般性介绍。

第三章 扭转(6课时)

内容:扭转的概念和实例;扭矩和扭矩图;薄壁圆筒扭转时的应力和变形;纯剪切、剪切虎克定律、剪应力互等定理;圆轴扭转时的应力和变形;强度和刚度条件;扭转时的弹性应变能;非圆截面扭转的概念。

重点讲解圆轴扭转时的应力和变形计算,强度和刚度条件。对非圆截面轴扭转及薄壁杆扭转作简单介绍。

第四章 弯曲应力(10课时)

内容:对称弯曲的概念和实例;梁的计算简图、剪力、弯矩及其方程;剪力图和弯矩图;弯矩、剪力和分布载荷集度的关系及其应用。纯弯曲时的正应力公式;弯曲正应力的强度计算;矩形截面梁和工字形截面梁的剪应力;弯曲剪应力的强度计算;提高弯曲强度的措施;弯曲中心的概念。

重点讲解梁的内力及其计算方法,剪力图和弯矩图的画法。介绍平面弯曲概念,剪力、弯矩方程的写法。利用弯矩、剪力与分布荷载集度间的关系画弯矩图作为难点仔细讲解,反复训练。梁在纯弯曲时的正应力计算,梁的强度校核。介绍梁横截面上的切应力,合理截面问题。一般介绍截面核心的概念。

第五章 梁弯曲时的位移(6课时)

内容;梁的挠曲线及其近似微分方程;用积分法求梁的挠度和转角;根据叠加法求梁的挠度和转角;梁的刚度校核;提高弯曲刚度的措施;梁弯曲时的变形能。

重点讲解梁的挠度和转角,梁的挠曲线近似微分方程。详细介绍用积分法、叠加法求梁的挠度和转角,梁的刚度校核,简单超静定梁计算。一般介绍提高弯曲刚度的措施。

第六章 简单的超静定问题(6课时)

内容:静不定结构的概念和实例;静不定结构的特点;力法解静不定结构;拉压扭转静不定问题。

重点讲解用力法分析静不定问题。其它问题简单介绍。

第七章 应力状态与强度理论(8课时)

内容:应力状态、主应力和主平面的概念;平面应力状态下的应力分析-解析法和图解法;三向应力状态基本概念;平面应力状态下的应变分析;广义虎克定律;强度理论的概念;材料破坏形式;四种常用强度理论、莫尔强度理论。

重点讲解应力状态的概念,主应力和主平面。较详细介绍平面应力状态下的应力分析,三向应力圆,最大剪应力,广义胡克定律。一般介绍平面应力状态下的应变分析,形状改变比能的概念。重点讲解强度理论的概念,详细介绍最大拉应力理论,最大拉应变理论,最大剪应力理论,形状改变比能理论。一般介绍相当应力的概念、其它强度理论及强度理论的适用范围。

第二篇:冲突法英文课件

第五章 法律冲突

Relationship between U.S.state and federal law

The relationship between state and federal law in federal courts gives rise to complex

issues in both domestic and international cases.These issues are subject to the so-called

 Until the 1930s, the federal courts had followed the rule of Swiff v.Tyson and applied a

general federal common law in diversity cases.Under Swiff v.Tyson, federal courts were generally free to apply state general federal common law, while state courts were at liberty to apply state common law.In Erie Railroad Co.v.Tompkins, however, the Supreme Court narrowly limited the federal court’s authority to fashion general common law rules.Declaring that “there is no federal general common law,” the Court held that, in the absence of valid federal legislation, federal courts must ordinarily apply state substantive law, including state common law rules fashioned by state courts.The Court based its decision in large part on the perceived “mischievous results” that flowed from permitting federal courts to apply federal law, and state courts to apply state law. To redress these perceived defects, Erie established fundamentally new principles governing

the relationship between state and federal law that a valid federal statute, treaty, or regulation preempts inconsistent state law, and must be applied by both state courts and federal diversity and alienage courts.If no valid federal substantive law applies, however, the Erie doctrine provides generally that “procedural” issues in federal diversity actions are governed by federal procedural law, while “substantive” issues are governed by state substantive law.Federal procedural law applies only in federal courts, not in state courts.Relationship between international agreements and U.S.law

The U.S.Constitution permits entry by the United States into “treaties”.In determining the

legal effects of a treaty under U.S.law, U.S.courts distinguish sharply betweenand “have immediate legal effects within the contracting states, without the need for implementing legislation or regulations;a non-executing treaty is not intended to have direct legal effect, but instead contemplates domestic implementing legislation.Whether a treaty is self-executing or non-executing under U.S.law depends on the intentions of the United States in ratifying the treaty. The U.S.Constitution declares that self-executing treaties are the ”Supreme Law of the

Land“.Even without implementing legislation, self-executing treaties are federal law that enjoy essentially the same status in U.S.courts as federal statutes.Self-executing treaties create enforceable rights in U.S.courts and preempt inconsistent state law.In the case of conflict between treaties and federal statutes, a ”last-in-time“ rule applies: a federal statute supersedes prior inconsistent treaties, and conversely, a treaty supersedes prior inconsistent federal statutes.In contrast, non-self-executing treaties lack binding force in U.S.courts until implemented

by congressional statute.As a result, federal law ordinarily prevails over inconsistent non-self-executing treaties.The same result apparently also applies with respect to state statutes and state common law.Relationship between customary international law and U.S law

The status of customary international law in U.S.courts is less clear than that of treaties

and other international agreements.In practice, the direct application of customary international law occurs in relatively few cases, owing principally to the comprehensive

character of U.S.law and the fragmentary coverage of international law.In the absence of any federal law on an issue, U.S.courts will generally give effect to

customary international law.If a subsequent federal statute requires a result contrary to preexisting principles of customary international law, then U.S.courts must give Congress's legislation priority.They must do so even though this will place the United States in violation of international law.Moreover, even when a preexisting federal statute is said to be inconsistent with subsequent international practice, the prior statute will probably prevail.The same result should apply in conflicts between customary international law and rules of federal common law.The effect of a conflict between customary international law and state law is less clear.Because customary international law is federal law, it should in principle preempt both prior and subsequent state law.思考判断

 法律冲突只会在国际私法领域发生。

 发生法律冲突的最根本原因是立法权的分立。

 现代国际私法认为,公法领域不会发生法律冲突。

 国际法律冲突与区际法律冲突都是空间上的法律冲突。

 对于人际法律冲突的解决,目前尚没有统一的规则。但它与解决空间上的法律冲突的规则相似,以规定婚姻、家庭及其他有关人的身份、能力方面的问题居多。

 国际私法上所讲的法律冲突,主要是指法律适用上的冲突

 解决国际民事法律冲突的方法主要有冲突法方法和实体法方法两种。

 对一个具体的国际私法案件,可以同时用实体法方法和冲突法方法解决之。

第六章 冲突规范

确定连接点通常考虑的因素

 冲突规范的“范围”所要解决的法律问题的性质与分类;

 冲突规范所选择的连接点必须是“范围”中法律关系的构成要素之一;

 区分不同连接点的含义和作用,并要看有关连接点是否与特定的法律关系具有较本质的联系,对特定的问题具有相对重要性;

 有关的连接点必须是各国立法机关经常作为自己刑事立法管辖权的根据;

 有关的连接点必须便于认定,便于使用,并与特定的地域相联系;

 有关连接点的选择必须符合内国处理涉外民事法律关系的政策。

Concept and types of the conflict rule

The norms indirectly regulating facts of private international law form a special group of statutory provisions called conflict rules.On a broader plane a conflict rule is understood to mean a norm regulating any conflict of law, to wit, determining which of several relevant rules is to be actually applied.Conflict cases may be international, when the choice is between the laws of several sovereign States;the norms resolving such conflicts are called conflict rules of the international type.Conflicts may also arise between differing laws of non-sovereign parts of a sovereign State.These are cases of interregional conflicts which are governed by interregional conflict rules.The structure of the choice-of-law rule

The theory of legislation distinguishes between three structural elements of a legal norm: fact, provision and sanction.The choice-of-law rule(conflict rule)is a legal norm of special structure exhibiting some peculiarity in each of these elements.Its most striking feature consists in never containing sanctions.The consequences of infringement are determined not by the conflict rule itself but by the positive rules of the legal system invoked by it.In this sense every conflict rule is a dependent norm.Some connecting factors at times fail to provide guidance for the judge in the discovery of the applicable law.Nationality, for instance, is a connecting factor which is inapplicable to stateless persons(have no nationality).Some connecting factors(nationality, domicile, residence, seat, location, etc.)are subject to change over time.It is necessary that the point of time relevant to the choice of law should always be defined in the conflict rules.The Need for “connecting factor”

In every legal system there is the need for some kind of link between the forum state and a person in order to determine when that state may exercise its sovereign powers with respect to that person.The particular link needed will often depend on the purpose for which a state wishes to exercise its power over a person.A little link may be needed in order for a state to exercise the power to tax;the fact that revenue was derived from an in-state transaction may be enough.A different, more substantial link to the forum state may be needed when the state seeks to require a person to defend himself in its courts or when the state seeks to impose substantive liability upon a person under the laws of the forum state.For these and many other purposes, legal systems establish “connecting factors.” The United States Supreme speaks, in various contexts, of “minimum contacts,” “significant contacts,” “affiliating circumstances,” and the like.From among the many connecting factors which may be used to establish the necessary link between a person and the forum state, all legal systems will identify one as the most important.It will serve as the connecting factor in virtually all circumstances and for all purposes.Other connecting factors will play a more subsidiary role, being usually restricted to specific situation.The structure, operation, and escape mechanisms of the traditional approach

The traditional approach was based on pre-conceived choice-of-law rules formulated around broad categories barrowed from domestic law, such as torts, contracts, conveyances, successions, status, etc.The process of employing these rules was divided into three distinct mental steps.The first step was to determine which rule was applicable to the problem by fitting that problem into legal category of tort, contract, and so forth.This step is known as characterization, classification, or qualification.The second step was to “localize” the connecting factor, to place it on the map, by determine where the tort or the contract occurred.The third step was to ascertain the content of the law of the state in which the connecting factor was located, to determine “how much” of that law was applicable to the case.Each of these three steps offered different opportunities for “escape” or manipulations.Judges who were dissatisfied with the results produced by an orthodox application of the traditional theory frequently have resorted to these escape.This casuistic and thus unpredictable practice inflicted a serious blow to the traditional theory’s claim of certainty and predictability.思考判断

 由于冲突规范缺乏可预见性和明确性,它不是法律规范。

 冲突规范是既不同于实体法规范,又不同于程序法规范的第三种法律规范。

 与一般的法律规范的逻辑结构不同,冲突规范的结构包括”范围“和”系属“两部分。 一般说来,双边冲突规范可以分解成两个对立的单边冲突规范。

 选择适用的冲突规范和重叠适用的冲突规范都必须有两个或两个以上的连结点。 连结点是冲突规范中将“范围”和“准据法”联系起来的客观的不变的事实根据。 系属公式都是从双边冲突规范的系属发展起来,并抽象化而形成的。

 系属公式与冲突规范的涵义是一致的。

 行为地法包括合同缔结地法、合同履行地法、婚姻举行地法和侵权行为地法以及法院地法。

 最密切联系地法既是一项法律选择的指导原则,又是一个系属公式,可适用于许多不同性质的涉外民事法律关系。

选择判断

 《民法通则》第146条:侵权行为的损害赔偿适用侵权行为地法律。当事人双方国籍

相同或者在同一国家有住所的,也可以适用当事人本国法律或者住所地法律。属于那种冲突规范?

A 重叠性冲突规范B 有条件的选择性冲突规范C双边冲突规范D无条件的选择性冲突规范

 我国《海商法》第270条规定:“船舶所有权的取得、转让和消灭,适用船旗国法律”。

属于哪种冲突规范?

A.单边冲突规范B.双边冲突规范 C.选择适用的冲突规范D.重叠适用的冲突规范  “亲子间的法律关系,依父之本国法;如无父时,依母之本国法”。属于哪种冲突规范?A单边冲突规范 B双边冲突规范 C 重叠型冲突规范 D 选择性冲突规范

 “在中华人民共和国境内履行的中外合资经营企业合同、中外合作经营企业合同、中外

合作勘探开发自然资源合同,适用中华人民共和国法律。”该条款属于下列选项中哪一类型的冲突规范?

A单边冲突规范 B双边冲突规范 C重叠适用的冲突规范 D选择适用的冲突规范

第七章准据法的一般问题

Approaches to choice-of-law problem

When you see a choice-of-law question on your conflict exam, you should write your

answer in terms of the choice-of-law approach the forum court follows.But what approach is that?

(1)If your question tells you which approach is to be used, for example, ”assume that the

forum follows the approach to choice of law suggested by the Restatement(Second)of Conflict,“ then obviously you should answer the question in terms of that(Second Restatement's ”most significant relationship“)approach.(2)But if no approach is specified in the question, you should analyze the question in terms

of several different approaches.The following four approaches, or a combination of them, are used by most American courts today:(a)Traditional, vested rights approach of the First Restatement--the law of the state in which the parties' rights ”vested“ applied;(b)Most significant relationship approach of the Second Restatementthe court considers the underlying policies of the laws of the state involved and the interest of the states in furthering those policies to decide which law should be applied to the particular issue;and(d)Leflar's ”better law“ approach-this approach rejects ”rules“ and ”formulas“ and based on particular consideration, selects the better law.Substance or Procedure

A subset of the characterization problem involves the choice between substance and

procedure.Under the traditional approach, procedural problems(those dealing with the process of litigation)were controlled by forum law;substantive issues(those involving claims of right)were determined by the law of another jurisdiction. The substance/procedure dichotomy arises because the forum has strong reasons for seeing

its law applied to issues concerning pleading, motion practice, the presentation of evidence, and so forth.Forum interest and convenience, therefore, should dictate the classification of an issue as ”procedure.“ Expressed differently, if neither the forum's interest nor judicial convenience is involved, no reason exists to treat the problem as ”procedure." The focus should be on whether the reasons which gave rise to the substance/procedure distinction are involved in the problem, not on the judge's vague intuition or on a precedent which addressed the issue in a different setting and is, therefore of questionable application.思考判断

 所有用来解决涉外民商事纠纷的法律规则都是准据法。

 在审理涉外民商事案件时,根据中国的冲突规范应适用某外国法时,应适用该外国的实体法和程序法。

 冲突规范的目的就是找到合适的准据法。

 根据法律的不同性质决定不同的法律选择方法自国际私法产生以来一直有较大的影

响。

 政府利益分析方法是建立在抛弃传统冲突规则的基础之上的。

 比较损害方法实质上是政府利益分析说的一种。

 程序问题适用法院地法是现代各国国际私法的普遍作法。

 英国和美国原来把时效问题作为程序法问题,现在在很多情况下识别为实体法问题,对其适用案件的准据法。

 有关证据的问题都是程序法问题,应适用法院地法。

 当冲突规范指定适用多法域国家的法律时,有的国家直接适用冲突规范中连结点指引的法律,有的国家依被指定为准据法国家的“区际私法”解决。我国法院在实践中综合适用上述两种方法。

第八章 冲突法的一般问题

1898年9月,一住所在英国的英国女子黛安娜与一住所在法国的法国男子

菲利普在英国按英国方式结婚。时年男方19岁,该婚姻没有经过男方或女方

父母的同意。婚后不久,男方父亲知晓,即令其子返法。而后,男方在法国

法院提起诉讼,要求宣告该婚姻无效。

1901年11月,法国法院认为,“经父母同意而缔结婚姻”是属于婚姻能力问 题,依属人法,判决这个婚姻由于未按法国法的要求取得父母的同意而无

效。在这个判决生效以后,菲利浦在法国再次结婚。

1904年,黛安娜在英国与威廉·奥格登在英国举行婚姻仪式。1906年7月,威廉·奥格登到英国法院提起诉讼,要求法院宣布他与黛安娜的婚姻无效,理

由是当他们结婚时,黛安娜的前夫菲利浦仍然活着,且黛安娜与菲利浦的婚

姻关系并没有根据英国法有效解除或宣告无效。黛安娜辩称她与菲利浦之间的婚姻并非合法婚姻,且这一婚姻已为法国法院宣告无效。

上诉法院将结婚是否需父母之同意视作婚姻的方式问题适用缔结地英国 法,而英国法无此限制。因此判决戴安娜前婚有效,支持了原告。1908年7

月,黛安娜到英国高等法院提起诉讼,要求解除她与菲利浦的婚姻关系,理

由是菲利浦有遗弃和通奸行为。但英国法院驳回她的诉讼请求,理由是菲利

浦的住所在法国,英国法院对此没有管辖权。

Characterization

 The “characterization of the cause of action” means the allocation of the question raised by

the factual situation before the court to its correct legal category.Its object is relevant to rule for the choice of law.The rule of any given system of law are arranged under different categories, some being concerned with status, others with succession, procedure, contract,tort and so on.The jurisdiction-selecting rules of the First Restatement required that each case be labeled

in order to determine which choice of law rule applied.If the case were labeled a “contract” problem, then the law of the place of making or performance would be applied;if the case sounded in “tort”, then the system specified application of the law of the place of jury.Obviously, the result could turn on which label the court chose for problem.Although characterization is probably an inescapable part of thinking conceptually about

any problem, its use entails a substantial risk.Such “decision-making by pigeon-hole” avoid the reasoning necessary to explain why a particular pigeon-hole should be chosen.Characterization encourages mechanical choice rather than reflective inquiry into the reasons why a particular result is proper.Characterization plays a less prominent role in modern theories, which have tried to focus

on the policies that legal rules are designed to serve.Interest analyst, such as Currie, have very little regard for this device.Because the Second Restatement employs a number of jurisdiction-selecting presumptions, characterization cannot be avoided when using that system.

第三篇:简历课件 英文版本

Resume Writing & Interview

Introduction

CV(Curriculum Vitae)---―the course of one’s life‖

One or two pages summary of your education, skills, accomplishments and experience.To win an interview

Components of a Resume

Heading

Yin Zheng

Department of Foreign Languages, Yuanpei College,900 Chennan Avenue, Shaoxing, China, 312000

0575-64187580, ***

Job/career objective

• What kind of job are you hoping to do?

• e.g.Seeking a position with more opportunities and challenges for self-development The objective should be to the point

Format

• An X position in an organization where Y and Z would be needed(or, in an

organization seeking Y and Z).examples

• To obtain a position of teaching English as a second language where a special ability to

motivate and communicate effectively with students would be needed.•

To obtain an entry-level position within a financial institution requiring strong analytical and organizational skills.Don’t write anything too general or broad,Skills and activities Work experience Education Job/career objective(optional)Heading

• To obtain an entry-level position in a foreign trade company.就业选择

• 外贸业务员或业务助理;商务助理/文秘;外企/民企行政助理;船公司销售或客服;

银行

• 其它

Education

Education

2007.9 – 2011.6Bachelor of Arts in English,Shaoxing University, Zhejiang, China(SXU)

Honors

2007-2010Second Prize Winner of Scholarship offered bySXU

Major Courses:

Business EnglishBusiness English WritingBusiness NegotiationCross-cultural communication Experience

Experience

Summer 2008Changhong Textile Company, Shaoxing,Zhejiang Province

Responsible for filing documents and

quality control

Sills and activities

Language Skills

English: fluent in speaking, writing, and translating

English.Especially good at …

French: conversational

Computer Skills

Auto CAD, CAD, Word, Access, Excel, PowerPoint

Activities

July, 2010Volunteer of the 6th Word ChoirGames

Skills

Qualification and skills 创业 公务员;事业单位;国企 翻译;教师(国有/民办/培训机构)

English level: CET – 6,ILETS: 6.0

Computer skill: A good command of MS system,including Word, Excel, and PowerPointDriving License: Holder of Type C License

Language Rules

• Use verbs of action to describe your job responsibilities.求职笑话

面试人员给了一位来应征的男士一张履历表,当他看完这位填好的简历表时,老板当场晕倒.简历表这样写到:

姓名: 英文的还是中文的?

年龄: 这是私人问题.身高: 这跟工作有关系吗?

体重: 随时改变,饭前饭后都不同.居住地: 那是一个特别的地方,我生命的舞台.电话: 爱立信手机.电子邮箱:只留给漂亮和富有的女孩.上班时间:越短越好.应征职位:不做什么事情,但能被美女包围的职位.学历:毕业于一个你找不到的大学.语言能力:侃大山是专长.兴趣:睡得天昏地暗.经历:游戏人生.曾任职位:高级的或低级的都是一种经历.婚姻状况:正在寻找漂亮和富有的女孩.未来期望:只负责主席台上讲话,并且希望尽早退休.希望待遇:比实际工作量拿的多就行.• 姓名:父母取的。

• 年龄:不小了!身高:很高。体重:中等。居住地:家里。电话:在身上。电子邮件:朋友帮我申请的。上班时间:8小时。应征职位:一位。学历:如果毕业的话有高中学历。语言能力:有。兴趣:很多。生日:还没到吧!经历:刚来的时候摔了一跟头!曾任职位:小学时当过纠察队喔!Don't use “I” in your resume.• 已婚未婚:父母有结婚。

• 未来期望:再找好工作。

• 希望待遇:希望大家都很疼我求职渠道的获取

• 互联网

微博

• 亲戚、朋友、导师介绍 各高校毕业生专场招聘会 应届生求职网(浙江频道)、高校人才网、浙江人才网 51job、智联招聘、中国英才网、文理学院就业信息网 广州一场招聘会上,一家公司把应聘者有微博列入了招聘条件。用人单位觉得微博

信息量大,也可以考查出应聘者的兴趣爱好。公司在收到简历后会认真研究每一个人的微博,包括他关注的人和粉丝。微博成了名片、成了镜子、成了一个没有掩饰的你。

Cover letter 求职信/自荐信

• 又叫自我推荐信或自荐信

• 主要表述主观愿望与专业特长

简历投递建议

• 投递简历的信箱

• 邮件的形式

投递简历的信箱

• 选择稳定性、可靠性高的邮箱,推荐Gmail,yahoo

• 邮箱的ID要显得专业,成熟并职业化。可采用英文名+中文姓氏;中文拼音+数字(注

册日期、生日等)邮件的标题

邮件的标题

• 若出身名校或经验丰富

邮件的形式

• 推荐以正文的方式将简历粘贴到邮箱

面试

要求以附件形式发送,则附件命名―应聘的职位+姓名‖ 电话面试 至少要写上应聘的职位和姓名

• 一对一面试 一对多面试 小组面试

电话面试

• 时间:10-30分钟

Tips

• 目的:测试你的精神准备和心理准备 在交谈中注意语速和逻辑,若没有任何准备 Thank you for calling me, Mr.XX.Would you mind calling me again 5 minutes later

since my cell phone does not receive very well here, or you may leave your phone number and I will call you back.注意必要的礼仪、细节,把―谢谢‖挂在嘴边

牢记面试官的名字

记笔记 • • •

面试着装

• 女生

• 庄重典雅的套装—— 《杜拉拉升职记》

• 男生 西装 领带 公文包 中高跟皮鞋

面试英文

• How are you today? Tell me about yourself.What type of position are you looking for? What is your greatest strength? What is your greatest weakness?

• Why do you want to work for us?

面试笑话

•Son and Daughter 今天下午的 PWC(普化永道)面试晕了。感觉不太好。临走时,想轻松一下,拍拍马

屁。看到了桌上面试官小孩的照片。对他说:How lovely your son is.(你儿子很可爱啊)

他说了一句,我立马倒下:She is my daughter.(她是我女儿)我只好自圆其说:Like a son.(长得挺像儿子的)我觉得自己不再说人话了。别了,PWC

第四篇:梵高 英文课件演说稿

2.March 30, 1853, Groot-Zundert,July 29, 1890, Auvers-sur-Oise, France.3.We've all heard this sad story.Vincent van Gogh lived a short, deeply tormented life, throughout which he sought(in vain)his place in the world.He died, by his own hand, feeling his life was a miserable failure.Unbeknownst to Vincent, the work he did pioneered the Expressionistic style and, 150 years after his birth, his name would be world famous

4.5.Vincent was the son of a Dutch Protestant minister, and grew up believing that his

calling, too, lay in serving his fellow man.Unfortunately, his nature was such that anything he attempted was doomed to failure.He wasn't inattentive to career moves but, rather, threw himself into endeavors with such ferocity that he quickly exhausted his body, followed by his mind.By the time he was 27, van Gogh had been a theology student, a semi-trained evangelist in the slums of London and the mines of Wasmes(in Belgium), a French tutor, an unsuccessful art salesman and spurned by love.6.7.Twith 15 sunflowers was painted in Arles, in 1888.The painting is in the collection of the National Gallery in London, his is one of several versions of sunflowers that Vincent van Gogh painted.This version England..8。Product Information:Vincent Van Gogh’s genius hauntingly shines in the swirled brushstrokes, vivid colors and distorted forms of “Starry Night.” A Dutch Grand Master, Van Gogh(1853 – 1890)was an astoundingly prolific post-Impressionist who produced all

of his work in 10 years, but only sold one painting in his life.While institutionalized, Van Gogh created “Starry Night,” his most famous painting, completely from memory.It now hangs in the permanent collection in New York’s Museum of Modern Art.This high-quality art print is expertly produced to capture the vivid color and exceptional detail of the original..9.Product Information

Vincent Van Gogh(1853 – 1890)“Café Terrace,” is the first of three works featuring a starry sky.A post-Impressionist Master, Van Gogh magnificently captures the subtleties of natural and artificial nighttime light without using the color black.Driven by a love of his art and a quest to find his place in the world, Van Gogh struggled with depression and died at a young age.More than 100 years after his death, the Café Terrace lives on, renamed Café Van Gogh, and repainted in the same tones as his masterpiece.10I purposely bought a mirror good enough to enable me to work from my image in default of a model, because if I can manage to paint the colouring of my own head, which is not to be done without some difficulty, I shall likewise be able to paint the heads of other good souls, men and women.”

11.①First ladyLove is wishful ThinkingFaild

②Second ladyTouch social tahoo,love his cousinFaild

③Third lady150 francs ruin marriageFaild

12.In Van Gogh, performances are professional but lack cohesion.The film disappoints on the levels described but it is for now by far the best interpretation we francophiles and art lovers have on the subject of this endlessly fascinating and mysterious artist.

第五篇:大学课件:矿山岩体力学试卷及答案-2008级

《矿山岩体力学》考试题(120分钟)(A卷)

班级

姓名

学号

成绩

_____

_______

题号

总计

得分

一、名词解释(每小题4分,共10题,共40分)

1.圣维南原理

2.逆解法

3.岩石孔隙率

4.延性破坏

5.蠕变

6.结构面线连续性系数

7.围岩应力

8.支承压力

9.构造应力

10.地应力的间接测量法

二、简答题(每小题8分,共3题,共24分)

1.写出二维直角坐标下的弹性力学基本方程?

2.作岩石应力—应变全过程曲线示意图,并简述各个阶段特点?

3.简述具有单结构面的岩体强度如何确定?

三、计算题(每小题12分,共3题,共36分)

1.已知一点的六个应力分量为,,,试求出该点的三个主应力大小和最大主应力的方向?

2.将某一岩石试件进行单轴压缩实验,其压应力达到28MPa时发生破坏,破坏面与水平面的夹角为60°,设该岩石满足摩尔-库仑破坏准则,(1)试求该岩石的内摩擦角和粘聚力C,写出摩尔-库仑方程式?

(2)画出此受力状态时的摩尔-库仑破坏准则示意图。

3.在地下400m深处,掘进一个圆形巷道,断面半径为5m,覆盖岩层的容重,侧压力系数为1,试求:

(1)求离巷道壁面2m处围岩的径向应力和环向应力大小?

(2)绘出巷道顶板中线和侧壁中线处的和曲线图。

《矿山岩体力学》考试题(A卷)答案

一、名词解释(每小题4分,共10题,共40分)

1.圣维南原理:如果把物体的一小部分边界上的面力,变换为分布不同但静力等效的面力(主矢量相同,对于同一点的主矩也相同),那么,近处的应力分布将有显著的改变,但远处所受的影响可以不计。

2.逆解法:先设定各种形式的、满足相容方程的应力函数,并求出应力分量;然后再根据应力边界条件和弹性体的边界形状,看这些应力分量对应于边界上什么样的面力,从而得知所选取的应力函数可以解决的问题。

3.岩石的孔隙率:岩石中各种孔洞、裂隙体积的总和与岩石总体积之比。

4.延性破坏:岩石破坏之前的变形很大,且没有明显的破坏载荷,表现出显著的塑性变形、流动或挤出,这种破坏称为延性破坏。

5.蠕变:固体材料在不变载荷的长期作用下,其变形随时间的增长而缓慢增加的现象。

6.结构面线连续性系数:沿结构面延伸方向上,结构面各段长度之和与测线长度的比值。

7.围岩应力:在岩体内开挖地下硐室,围岩将在径向、环向分别发生引张及压缩变形,使得原来的径向压应力降低,而环向压应力升高,通常,将这种应力重分布所波及的岩石称之为围岩,重分布后的应力状态叫围岩应力。

8.支承压力:在岩体内开掘巷道后,巷道围岩必然出现应力重新分布,一般将巷道两侧改变后的切向应力增高部分称为支承压力。

9.构造应力:由地质构造运动而引起的地应力。

10.地应力的间接测量法:借助某些传感元件或某些媒介,测量和记录岩体中某些与应力有关的间接物理量的变化,如岩体中的变形或应变,岩体的密度、渗透性、吸水性、电磁、电阻、电容的变化,弹性波传播速度的变化等,然后由测得的间接物理量的变化,通过已知的公式计算出岩体中的应力值。

二、简答题(每小题8分,共3题,共24分)

1.写出二维直角坐标下的弹性力学基本方程?

(1)平衡微分方程

(2)几何方程

(3)物理方程

2.作岩石应力—应变全过程曲线示意图,并简述各个阶段特点?

四个区段:①在区段内,该曲线稍微向上弯曲;②在区段内,很接近于直线;③区段内,曲线向下弯曲,直至点的最大值;④下降段。第一区段属于压密阶段,这是由于细微裂隙受压闭合造成的;第二区段相应于弹性工作阶段,应力与应变关系曲线为直线;第三阶段为材料的塑性性状阶段,主要是由于平行于荷载轴的方向内开始强烈地形成新的细微裂隙,点是岩石从弹性转变为塑性的转折点,也就是所谓屈服点,相应于该点的应力称为屈服应力;最后区段为材料的破坏阶段,点的纵坐标就是单轴抗压强度。

3.简述具有单结构面的岩体强度如何确定?

可根据莫尔强度包络线和应力莫尔圆的关系进行判断,设图中为节理面的强度包络线;为岩石(岩块)的强度包络线;根据试件受力状态()可给出应力莫尔圆。应力莫尔圆的某一点代表试件上某一方向的一个截面上的受力状态。

首先,根据莫尔强度理论,若应力莫尔圆上的点落在结构面强度包络线之下,则试件不会沿此截面破坏。另外,当结构面与的夹角满足或时,试件也不会沿结构面破坏。但若应力莫尔圆已和岩石强度包络线相切,因此试件将沿的一个岩石截面破坏。若应力莫尔圆并不和岩石强度包络线相切,而是落在其间那么此时试件将不发生破坏,即既不沿结构面破坏,也不沿岩石面破坏。

此外,当为定值时,岩体的承载强度与的关系。水平线与结构面破坏曲线相交于两点,此两点相对于与,此两点之间的曲线表示沿结构面破坏时值,在此两点之外,即<或>时,岩体不会沿结构面破坏,此时岩体强度取决于岩石强度,而与结构面的存在无关。

三、计算题(每小题12分,共3题,共36分)

1.已知一点的六个应力分量为,,,试求出该点的三个主应力大小和最大主应力的方向?

解:(1)由,,,求得:

并且由主应力求解方程得:,求解该方程得三个主应力大小分别为:。

(2)当最大主应力为,其方向可由以下公式计算得:

其中,=3

=0

=0

求解,即得最大主应力在(x,y,z)坐标系下的夹角余弦为(1,0,0)。

2.将某一岩石试件进行单轴压缩实验,其压应力达到28MPa时发生破坏,破坏面与水平面的夹角为60°,设该岩石满足摩尔-库仑破坏准则,(1)试求该岩石的内摩擦角和粘聚力C,写出摩尔-库仑方程式?

(2)画出此受力状态时的摩尔-库仑破坏准则示意图。

解:(1)根据摩尔-库仑破坏准则知岩石破坏时的破坏面与水平面的夹角为,并由题意知,所以得岩石的内摩擦角。

再由摩尔-库仑破坏准则知岩石破坏时主应力符合,由题意知岩石单轴压缩实验时,继而求得。

即得摩尔-库仑方程式为。

(2)

3.在地下400m深处,掘进一个圆形巷道,断面半径为5m,覆盖岩层的容重,侧压力系数为1,试求:

(1)求离巷道壁面2m处围岩的径向应力和环向应力大小?

(2)绘出巷道顶板中线和侧壁中线处的和曲线图。

解:(1)由题意知该巷道处的垂直应力,并由侧压力系数为1,得水平应力。由此得该圆形巷道处于静水压力下,此时围岩的径向应力和环向应力表达式为:

再由题意知,式中原始应力,断面半径,离巷道壁面2m处围岩即为距巷道中心距离,代入上式得。

(2)

《矿山岩体力学》考试题(120分钟)(B卷)

班级

姓名

序号

成绩

_____

_______

题号

总计

得分

一、名词解释(每小题4分,共10题,共40分)

1.岩石力学

2.半逆解法

3.岩石孔隙比

4.脆性破坏

5.单向抗压强度

6.变形模量

7.岩体结构

8.围岩应力

9.支承压力

10.地应力的直接测量法

二、简答题(每小题8分,共3题,共24分)

1.试述弹性力学的基本假定?

2.作岩石蠕变的典型应变—时间曲线,并简述其特点?

3.简述矿山岩体力学这门学科的自身特点?

三、计算题(每小题12分,共3题,共36分)

1.将某一岩石试件进行单轴压缩实验,其压应力达到40MPa时发生破坏,破坏面与水平面的夹角为60°设该岩石满足摩尔-库仑破坏准则,试求:

(1)该岩石的内摩擦角和粘聚力C?

(2)当对其进行三轴压缩实验,围压为10MPa时,轴向压应力达到多少时岩石破坏?

2.在地下600m处,掘进一圆形巷道,断面半径为3m,覆盖岩层的容重,侧压力系数为1,试求:

(1)求离巷道壁面4m处围岩的径向应力和环向应力大小?

(2)绘出巷道顶板中线和侧壁中线处的和曲线图。

3.设有矩形截面的长梁(长度远大于深度h),它的宽度远小于深度和长度(近似的平面应力情况,可取单位宽度的梁),在两端受相反的力偶而弯曲,体力可以不计,设满足相容方程的应力函数,试用半逆解法求应力分量?

《矿山岩体力学》考试题(B卷)答案

一、名词解释(每小题4分,共10题,共40分)

1.岩石力学:岩石力学是研究岩石的力学性质的一门理论和应用科学,是探讨岩石对周围物理环境中力场的反应。

2.半逆解法:针对所要求解的问题,根据弹性体的边界形状和受力情况,假设部分或全部应力分量的函数形式,并从而推出应力函数的形式,然后代入相容方程,求出应力函数的具体表达式,再由应力函数求得应力分量,并考察这些应力分量能否满足全部应力边界条件(对于多连体,还须满足位移单值条件)。如果所有条件都能满足,自然得出的就是正确解答。如果某方面的条件不能满足,就要另作假设,重新进行求解。

3.岩石孔隙比:岩石中各种孔洞和裂隙体积的总和与岩石固体部分实体积之比。

4.脆性破坏:岩石在载荷作用下没有显著觉察的变形就突然破坏的形式。

5.单向抗压强度:岩石试件在单轴压力下(无围压而轴向加压力)抵抗破坏的极限能力或极限强度,它在数值上等于破坏时的最大压应力。

6.变形模量:在应力—应变曲线上的任何点与坐标原点相连的割线斜率,表示该点所代表的应力的变形模量。

7.岩体结构:岩体中结构面与结构体形态和组合的特征。

8.围岩应力:在岩体内开挖地下硐室,围岩将在径向、环向分别发生引张及压缩变形,因此使得原来的径向压应力降低,而环向压应力升高,通常,将这种应力重分布所波及的岩石称之为围岩,重分布后的应力状态叫围岩应力。

9.支承应力:在岩体内开掘巷道后,巷道围岩必然出现应力重新分布,一般将巷道两侧改变后的切向应力增高部分称为支承压力。

10.地应力的直接测量法:由测量仪器直接测量和记录各种应力量,如补偿应力、恢复应力、平衡应力,并由这些应力量和原岩应力的相互关系,通过计算获得原岩应力值。

二、简答题(每小题8分,共3题,共24分)

1.试述弹性力学的基本假定?

(1)连续性假设:假定整个物体的体积都被组成这个物体的介质所填满,不留任何空隙。

(2)完全弹性假设:假定物体能完全恢复原形而没有任何剩余形变。

(3)均匀性假设:假定整个物体是由同一材料组成的。

(4)各向同性假设:假定物体的弹性在所有各个方向都相同。

(5)小变形假设:假定整个物体所有各点的位移都远小于物体原来的尺寸,而且应变和转角都远小于1。

2.作岩石蠕变的典型应变—时间曲线,并简述其特点?

首先,在开始加载的瞬间,试件立即产生一个瞬时的弹性应变(图中OA段),这一段所经时间极短,可看作与时间无关。由A到B这一段应变不断增加,但应变速率逐渐减小,故曲线是下凹型,AB段称为过渡蠕变或第一阶段蠕变.由B到C这一段应变以恒定的速率增长,故BC段称为定常蠕变或第二阶段蠕变,这个阶段的时间延续最长。在C点以后应变又加速增长,故曲线呈上凹型,当应变达到某个数值D点时试件破坏,加速蠕变或第三阶段蠕变。

3.简述矿山岩体力学这门学科的自身特点?

(1)采深大。其它工程部门在地下开挖的巷硐大都在离地表不深的地点,而采矿工程的作业地点常在地下几百米深处,甚至达二、三千米以上。深部岩体动态与地表附近大不相同,地表附近岩体的破坏形式一般为脆性断裂,而较深处岩体则属粘塑性破坏,其次,岩体的应力状态也不相同,浅部岩体垂直应力与水平应力之差一般很明显,深部岩体却相差不甚显著。上述情况使矿山岩石力学所采用的地压计算方法和测试技术与其它工程相比有所不同。

(2)地下开采过程中安设的人工支护大多是服务年限不长或维护时间较短的临时结构物,只要求其在开采期间不致破坏或适时破坏,在开采后能维持平衡状态不危害地面安全即可,而且许多工程结构物还可以随采随废。所以,在计算精度、安全系数及岩体加固等方面的要求一般均低于水利水电、交通、建筑和国防等部门的标准。

(3)由于采矿作业地点必须服从于有用矿物的自然埋藏地点,使得选择地下工程建筑物的位置往往受很大限制。

(4)其他工程部门中研究的对象多是开挖后即不再转移的地下硐室或隧道,而矿井的采掘工作面是不断移动的,这就要求矿山岩石力学必须考虑难以预见的复杂地质变化对工程结构带来的影响。由于大面积开采还会引起采空区上方大量岩层移动和破坏,研究这些岩层的运动、破坏和平衡规律及其控制方法,是矿山岩石力学的重要课题,这也是区别于其他应用性岩石力学学科的重要内容。

三、计算题(每小题12分,共3题,共36分)

1.将某一岩石试件进行单轴压缩实验,其压应力达到40MPa时发生破坏,破坏面与水平面的夹角为60°设该岩石满足摩尔-库仑破坏准则,试求:

(1)该岩石的内摩擦角和粘聚力C?

(2)当对其进行三轴压缩实验,围压为10MPa时,轴向压应力达到多少时岩石破坏?

解:(1)根据摩尔-库仑破坏准则知岩石破坏时的破坏面与水平面的夹角为,并由题意知,所以得岩石的内摩擦角。

再由摩尔-库仑破坏准则知岩石破坏时主应力符合,由题意知岩石单轴压缩实验时,继而求得。

(2)当进行三轴实验时,由摩尔-库仑破坏准则知岩石破坏时主应力符合,即求得,即轴向压应力达到70MPa时岩石破坏。

2.在地下600m处,掘进一圆形巷道,断面半径为3m,覆盖岩层的容重,侧压力系数为1,试求:

(1)求离巷道壁面4m处围岩的径向应力和环向应力大小?

(2)绘出巷道顶板中线和侧壁中线处的和曲线图。

解:(1)由题意知该巷道处的垂直应力,并由侧压力系数为1,得水平应力。由此得该圆形巷道处于静水压力下,此时围岩的径向应力和环向应力表达式为:

再由题意知,式中原始应力,断面半径,离巷道壁面4m处围岩即为距巷道中心距离,代入上式得。

(2)

3.设有矩形截面的长梁(长度远大于深度h),它的宽度远小于深度和长度(近似的平面应力情况,可取单位宽度的梁),在两端受相反的力偶而弯曲,体力可以不计,设满足相容方程的应力函数,试用半逆解法求应力分量?

解:由应力函数

得相应的应力分量为:

=6ay,对于边界条件,首先考虑上下两个主要边界(占边界绝大部分)的条件。在下边和上边,都没有面力,要求,;

这是能满足的,因为在所有各点都有。其次,考虑左右端次要边界(占边界很小部分)的条件。在左端和右端,没有铅直面力,分别要求,这也是能满足的,因为在所有各点都有。

此外,由于的两端面是相对较小的边界,可以应用圣维南原理,将关于的边界条件改用主矢量和主矩的条件代替。即在左端和右端,边界面上合成的主矢量应为零,而合成的主矩应等于面力的力偶矩,亦即:。

将代上式得。

前一式总能满足,而后一式要求。

即得:。

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