第一篇:中英文摘要撰写规范(最终版)
本科毕业设计(论文)中英文摘要的撰写规范
摘要是毕业设计(论文)内容的代表;它提供了毕业设计(论文)内容的的信息内容,但不能代替它,因为其内容已大大简化,既摘要是毕业设计(论文)内容的简要论述。它应以浓缩的形式概括研究课题的内容、方法和观点,以及取得的成果和结论,应能反映整个内容的精华,以300-500字为宜。
摘要一般应说明研究工作的目的意义、研究方法、研究结果、主要结论及意义、而重点是结果和结论。
一个摘要是由四个要素组成的,即,毕业设计(论文)工作的目的、方法、技术成果和最终结论,而其重点是成果和结论;
摘要格式为: *****************(目的),*****************(方法),********(结果)。************(结论)。
—— 目的主要说明作者写此文章或做毕业设计(论文)的目的,或说明本文主
要要解决的问题。
—— 过程及方法 主要说明作者主要工作过程及所用的方法,也包括众多边
界条件,使用的主要设备、仪器、编程工具和数据库管理软件。—— 结果作者在此工作过程最后得到的结果,既毕业设计(论文)任务书中的内容;如有可能,尽量提一句作者所得到结果的应用范围(例如,适用与什么操作系统等)和应用情况。
—— 结论作者在此工作过程最后得到的结论;如有可能,尽量提一句该结
论的应用范围。
例如,要叙述报考研究生这件事,为了考取研究生(目的),我花了两年时间,在这两年中,我没有回过一次家,假期也不例外,前一年重点准备英语,后一年准备其它功课(方法),总分考了295,单科成绩最低55分,最高75分(结果),国家录取分数线总分是300分,所以,我没有被录取(结论)。
撰写摘要时应注意以下几点:
(1)用精炼、概括的语言来表达,每项内容不宜展开论证或说明;
(2)要客观陈述,不宜加主观评价;
(3)成果和结论性字句是摘要的重点,在文字论述上要多些,以加深读者的印象;
(4)要独立成文,选词用语要避免与全文尤其是前言和结论部分雷同;
(5)既要写得简短扼要,又要生动,在词语润色、表达方法和章法结构上要尽可能写得有文彩,以唤起读者对全文阅读的兴趣。
(6)一般不要做自我评价;
(7)不得简单重复文章题目;慎用长句,不要分段;使用第3人称;
(8)采用规范化术语;新术语可使用原文或在译名后加括号注明原文;缩略语、略称、代号,在首次出现时也应说明;
(9)不得出现正文中的图号、表号、公式、章节号以及参考文献等;
1摘要长度(Length of the Abstracts)
摘要长一般少数情况下可以例外,视原文文献而定,但主题概念不得遗漏。
一般缩短摘要方法如下:
(1)取消不必要的字句:如“It is reported…”“,Extensive investigations show that …”, “The author disusses…”,“This paper concerned with…”;
(2)对物理单位及一些通用词可以适当进行简化;
(3)取消或减少背景情况(Background Information);
(4)限制摘要只表示新情况、新内容,过去的研究细节可以取消;
(5)不说废话,如“本文所谈的有关研究工作是对过去老工艺的一个极大的改进”切不可进入摘要;
(6)作者在摘要中谈及的未来计划不纳入摘要;
(7)尽量简化一些措辞和重复的单元,如:
不 用
at a temperature of 250℃ to 300℃
a t a high pressure of 200 MPa
at a high temperature of 1500 ℃
Specially designed or formulated 而 用 at 250-300 ℃ at 200 MPa at 1500 ℃ nothing
此外请注意:摘要第一句话切不可与题名(Title)重复;一般摘要记录都是与题名连排的,只是题名用黑体排印,因此可以认为题名便是摘要的第一句话。
遇到此种重复情况请改写。
例如:不用“WAVE FUNCTION FOR THE B CENTER IN LiF.A wave function for the B center in LiF is proposed assuming a linear combination of appropriate molecular orbits.The…”
而用“WAVE FUNCTION FOR THE B CENTER IN LiF.A linear combination of appropriate molecular orbitals is assumed.The…”
3文体风格(Styles)
(1)摘要叙述要简明,逻辑性要强。
(2)句子结构严谨完整,尽量用短句子。
(3)技术术语尽量用工程领域的通用标准。
(4)用过去时态叙述作者工作,用现在时态叙述作者结论。如:“The structure of dislocaton core in Gapwas investigated by weak-beam electro microscope.The dislocations are dissociated into two Shokley partial with separations of(80+10)and(40+10)A in the pure edge and screw cases respectively.(5)可用动词的情况尽量避免用动词的名词形式。如:用“Thickness of plastic sheets was measured” ;不用“Measurement of thickness of plastic sheet was made”。
(6)注意冠词用法,分清a是泛指,the是专指。如:“Pressure is a function of temperature”
不应是“Pressure is a function of the temperature”;“The refinery operates…” 不应是“Refinery operates…
(7)避免使用长系列形容词或名词来修饰名词,可用预置短语分开或用连字符(hyphen)
断开名词词组,作为单位形容词(一个形容词)。如:应用“The cholorine-containing propylene-based polymer of high meld index” 不用“The cholorine containing high melt index propylene based polymer”.(8)不使用俚语、外来语表达概念,应用标准英语。
(9)尽量用主动语态代替被动语态。如:“A exceed B” 优于“B is exceeded by A”.(10)语言要简练,但不得使用电报语言。如“Adsorption nitrobenzene on copper chronite investigation”应为“Adsorption of nitrobenzene on copper chronite was investigated”.(11)文词要淳朴无华,不用多姿多态的文学性描述手法。如“Working against time on hot slag and spilled metal in condition of choking dust and blinding steam, are conditions no maker would choose for his machines to operate in.”
(12)组织好句子,使动词尽量靠近主语。如:不用“The decolorazation in solutions of the pigment in dioxane, which were exposed to 10 h of UV irradiation, was no longer irreversible.”, 而用“When the pigment was dissoved in dioxane, decolorization was irreversible after 10 h of UV irradiation”.(13)用重要的事实开头,尽量避免用辅助从句开头。如:用“Power consumption of
telephone switching systems was determined from data obtained experimentally”, 而不用“From data obtained experimentally, power consumption of telephone switching systems was determined”.(14)删繁从简。如:用“increase”代替“has been found to increase”.(15)摘要中涉及他人的工作或研究成果时,尽量列出他们的名字。
(16)摘要词语拼写,用英美拼法都可;但每篇中应保持一致。
(17)英文题名开头第一词不得用The, And, An和A.(18)题名中尽量少用缩略词,必要时亦需在括号中注明全称(尽量中文文献题名中常用英文缩略字或汉语拼音缩略字);特殊字符及希腊字母在题名中尽量不用或少用。
4摘要中的特殊字符(Special Characters)
特殊字符主要指各种数学符号及希腊字母。希望在摘要中尽量少用特殊字符及数学表达式,因为它们的输入极为麻烦,而且易出错,影响摘要本身的准确性,应尽量取消或用文字表达,如“导热系数ρ”中的“ρ”即可去掉。再如:Ф=Aμ
α-1χ 或更复杂的表达式应设法用文字指引读者去看原始文献。
第二篇:中英文摘要
榆林学院毕业论文
俄国文学中“小人物”悲剧命运成因探析
肖世涛
(榆林学院中文系陕西榆林719000)
摘要:
19世纪俄国“自然派”作家正式提出了写“小人物”的口号。他们在作品中描述小人物的悲惨命运和内心痛苦,从而使文艺成为“社会的一面忠实的镜子”。“小人物”在社会中官阶、地位极其低下,生活困苦,但又逆来顺受、安分守己、性格懦弱、胆小怕事,因此成为“大人物”统治下被侮辱的牺牲者。但通过对作家普希金、果戈理、契诃夫、陀斯托耶夫斯基等关于小人物的作品及其主人公的分析,我们不难发现“小人物”的悲剧命运并非仅限于官僚统治欺凌等外在的社会原因,同时还有“小人物”自身固有的内在原因,其中,因循守旧不思转变观念的思维模式是酿成“小人物”悲剧命运的思想原因,软弱怯懦、不思反抗的逃避行为是酿成“小人物”悲剧命运的性格原因。作者再现“小人物”保守思想和懦弱性格的目的,在于通过对“小人物”灵魂的拷问,完成人格形态的批判,把他们从沉睡中唤醒。对“小人物”寄寓有限的同情,但更多地倾注了对其劣根性哀其不幸,怒其不争的抨击。揭示现实中小人物存在的具体现象,生活在现代社会的人们,应该静下心来反思一下,是不是自己身上也能找到小人物的影子,指出文章对现实的警示意义。
关键词:俄国文学小人物悲剧命运外在原因内在原因
I
俄国文学中“小人物”悲剧命运成因探析
An analyze on the cause of tragic destiny of "no man"
in Russian literature
XiaoShitao
(Chinese Department,Yulin College,Yulin,Shaanxi719000)
Abstract:In 19th century the writer of "the natural faction"in Russia proposed a slogan to write the life of "the no man".They described the tragic destiny and inner world pain of "the no man",and it made the literary arts to become "a faithful mirror of the society".These "no man"had a low position in the society and lead a miserable life,but at the same time,they all content with things as they are and had cowardly charcuter,therefore,they became the prey who were insulted under the domination of"the great man".However,according to the author's analyze on the work which were wrote by Pushkin,Nikolai Vasilievich Gogol,Anton Chekhov and Fyodor Mikhailovich Dostoevsky,we can easily find the reason of tragic destiny of the"no man"is not only some external causes but also some internal causes.Among all this reasons,the thought pattern of stick to old ways is their tragic destiny's thought reason.The author reproduce their conservative thinking and cowardly character in order to crieicize the personality from of the"no man"and awake them from deep sleep.In this thesis,the author gives the no man limited sympathy,but pay more attention to attack their sadness and not the behaviors of struggle for their angry.According to reveal the phenomanon of existence of"no man"in real life,the author hopes the people live in real life can introspect thenselves and shows the significance to the reality.
Key words:Russian literature;No man; Tragic destiny; External causes;Internal
causes
II
第三篇:中英文摘要
中英文摘要
作者姓名:段小洁
论文题目:单壁碳纳米管的AFM操纵、形变及相关拉曼光谱研究
作者简介:段小洁,女,1980年2月出生,2002年9月师从于北京大学刘忠范教授,于2007年7月获博士学位。
中文摘要
对形变碳纳米管(CNTs)的研究,包括研究其在应力存在下的结构演化、应力对其各种光电性质及电子能带结构的影响等,不仅对CNTs在复合材料、纳电子和纳机电器件、以及应力传感器等中的应用具有重要意义,还对相关理论的发展有巨大推动作用。本论文发展了对表面上单壁碳纳米管(SWNTs)的原子力显微术(AFM)可控操纵方法,基于此AFM可控操纵,研究了CNTs在弯曲形变下的屈曲行为,以及SWNTs在扭转和拉伸两种形变下的共振Raman光谱特征。主要成果包括:
1.发展了对表面上SWNT的AFM可控操纵方法;
通过对操纵过程中针尖运动路径的合理设置、SWNT上操纵位置和针尖下压距离的选择,可以向SWNT中引入各种类型的应力。SWNT中产生的应力由其和基底间的相互作用力保持。发展了基于Si的AFM氧化的SWNT纳米焊接术,以增加AFM操纵的可控性。当对表面有SWNT的基底Si进行AFM氧化时,新生成的SiOx会对SWNT进行包覆,从而可以将SWNT在氧化点有
效的固定到基底表面。而且SWNT的存在会对Si基底的AFM氧化有明显的增强作用,相同条件下,表面有SWNT的Si氧化后产生的SiOx,比没有SWNT时更多,这种增强作用有利于对
SWNT的焊接固定。焊接的强度可以通过改变氧化偏压、针尖运动速率(氧化时间)等进行调节,提高氧化偏压、降低针尖移动速率有利于增强纳米焊接的强度。空气中热氧化实验和拉曼光谱的表征均证明,此焊接过程对SWNT的化学结构无明显影响。在某些点对SWNT进行焊接固定后,AFM操纵引入的形变的大小和分布可以被有效地控制,从而大大增加AFM操纵的可控性。
采用更强的AFM氧化条件,可以实现SWNT和Si的同时氧化,从而可以在任意位点对SWNT进行切割。结合AFM纳米切割、焊接和操纵等操作,可以构筑各种复杂形状的SWNTs,体现
了AFM作为纳米工具箱的作用。
2.研究了CNTs在弯曲形变下的屈曲行为;
通过选择合适的操纵位点、被操纵的CNT片段长度、操纵路径并优化针尖下压距离,可以严格控制弯曲CNT的角度,这样通过AFM操纵对同一CNT的可控弯曲,获得了一系列弯曲角度逐渐增大的CNT。CNT被操纵以后,与基底相互作用力会有明显减小,这使得CNT的有效弯曲区域,位于与基底只有vdW相互作用的被操纵部分,在AFM表征下表现为固定部分和被操纵部分的交点。有效弯曲部分与基底间仅有vdW相互作用,其长度在整个弯曲过程中几乎保持不变。
通过记录弯曲“点”在弯曲角度逐渐增大过程中的高度变化,研究了CNTs在弯曲形变下的结构演化和屈曲行为。发现不同CNTs在弯曲过程中,表现出“突变”和“渐变”两种屈曲模式,分别对应于弯曲“点”高度的突跃、均匀弯曲向屈曲结构的直接转化,和弯曲“点”高度的逐渐增大、均匀弯曲向屈曲结构的逐渐转化。“渐变”屈曲导致一系列屈曲过渡态的出现。“突变”多发生于小直径管,而“渐变”更常见于大直径管。通过对CNTs的层数和厚度等的估算,发现一般情况下,“渐变”屈曲模式的CNTs比“突变”模式的CNTs具有更大的厚度直径比。对“突变”屈曲模式的CNTs,临界屈曲角度随CNTs直径的增大而减小。
分子动力学模拟发现,(1)所研究的CNTs中,SWNTs均为“突变”屈曲模式,而双壁和三壁管均采取“渐变”屈曲模式;(2)“渐变”屈曲过程对应弯曲角度逐渐增大时,多壁管从最外层到最内层的逐渐屈曲,和各管层屈曲程度的逐渐增加,这是由其多层结构导致的各层壁屈曲行为的不同步,和管壁间vdW相互作用对屈曲的阻碍造成的,这说明MWNTs的多层结构是导致其“渐变”屈曲的主要原因;(3)基底的vdW相互作用对CNTs的屈曲行为没有明显影响。从导致两种屈曲模式的机理考虑,除直径外,CNTs的层数对其屈曲行为也有重要影响,这预示了在CNTs的力学性质中,存在不同于传统尺寸效应的双尺寸效应,即直径和层数共同决定CNTs力学行为。
本工作利用AFM可控操纵,在实验上几乎全程观察了CNTs在弯曲过程中的结构演化和屈曲形成过程,其所揭示的两种屈曲模式的形成规律,不仅对大量存在的CNTs形变的理论工作提供了支持和参考,一定程度上填补了实验上的空白,还对CNTs在复合材料、纳电子和纳机电器件、以及应力传感器等中的应用具有重要意义,3.研究了扭转和拉伸形变下单根SWNTs的共振Raman光谱行为;
AFM操纵可以向超长SWNT中同时引入扭转和拉伸应力,由于拉伸形变比扭转形变的传输距离更远,在操纵点附近扭转和拉伸两种形变同时存在,距离操纵点较远的区域,只有纯拉
伸形变存在。扭转形变的产生证明了SWNT在AFM操纵下滚动的发生。
扭转和拉伸形变都会导致SWNTs拉曼模振动频率的变化。研究发现:(1)扭转形变下,RBM变大,位于~1600 cm-1的G+(E2(g))模振动频率发生较大的红移,而其他在1590 cm-1~1560
cm-1范围内的大部分G模会发生轻微的蓝移,振动频率发生红移的G模的位移量,一般远远大于发生蓝移的G模的位移量;(2)拉伸形变下,RBM和G+(E2(g))模振动频率不变,而在1590 cm-1~
1560 cm-1范围内的大部分G模会发生明显的红移。(3)不同Raman活性模对形变的敏感度不同,扭转形变下,RBM、位于~1600 cm-1的G+(E2(g))模比其他G模更敏感,而在拉伸形变下,其他G模却具有更高的敏感度。这与形变导致的发生变化的C-C键是否与各模的原子位移模式相关联有关;(4)通过对SWNTs中形变量大小和Raman频率对形变变化率d/d地计算,发现RBM振动频率对扭转形变的变化率d(RBM)/dt,随SWNTs手性角的增大几乎线性增大。
某些SWNTs中,扭转形变导致的对称性破缺还会导致Raman模的分裂或新模的出现。按照预测,这种分裂或新模的出现最可能发生在锯齿形和椅形SWNTs中。扭转和拉伸形变都会导致SWNTs共振拉曼振动模强度的变化,这体现了形变对SWNTs电子跃迁能Eii的影响。根据
共振拉曼理论和RBM峰的IAS/IS,可以计算扭转和拉伸形变对Eii影响的方向和大小。
应力对SWNTs共振Raman光谱的影响一直是人们关注的重要问题,本工作首次在实验上研究了扭转形变下SWNTs共振Raman振动频率和强度的变化。利用AFM操纵在单根SWNTs水平上的研究,可以排除不同直径和手性带来的平均效应,从而有利于揭示SWNTs的本征性质。对拉伸和扭转形变在同根SWNT中的比较,也为理解不同应力对SWNTs拉曼影响的不同提供了有利条件。
4.AFM操纵引入的应力沿SWNT管轴分布的分析和调控,及SWNTs相关力学性质的比较;分析了超长SWNT中,AFM操纵引入的应力的传输和分布,由于SWNT与基底间摩擦力的存在和AFM操纵后应力的部分驰豫,扭转和拉伸应力沿SWNT管轴都呈“”形分布,应力分布的各特征量,如应力的最远传输距离、最大应力点的位置和最大应力值、应力线性分布的斜率等,决定于AFM针尖施加到SWNT的力的大小、SWNT的剪切模量或弹性模量、以及SWNT与基底间摩擦力的大小;通过控制AFM操纵和采用图案化基底,对SWNT中应力的大小及分布进行了调控;通过比较不同SWNTs的应力分布特征量,在单根SWNT水平上,研究比较了它们的各力学参量,如剪切模量、杨氏模量,以及与基底间摩擦力的相对大小。各力学参量对SWNTs的直径无单调关系,说明了SWNTs手性对力学性质的影响。
关键词:单壁碳纳米管,AFM操纵与加工,形变,屈曲,共振拉曼光谱
AFM Manipulation, Deformation and Related Raman Spectroscopy of
Single-Wall Carbon Nanotubes
Duan Xiaojie
ABSTRACT
The study on deformed carbon nanotubes(CNTs), including the study of their structure evolution and properties change under strain, is important not only for the application of CNTs in composite materials, strain sensors, nanoelectronic and nanoelectromechanical devices, but also for the development of related theory.In this thesis, we have developed controlled atomic force microscopy(AFM)manipulation techniques for single-wall carbon nanotubes(SWNTs)on surfaces.Using this controlled AFM manipulation, the buckling behavior of CNTs under bending, and resonance Raman spectroscopy of SWNTs under torsional and uniaxial strains, have been studied.The main results are listed as followings:
1.Controlled AFM manipulation techniques for SWNTs on surfaces have been developed By defining proper tip path, manipulation position on SWNT, and choosing optimal tip pressing distance, different kinds of deformation can be induced into SWNT.The deformation is stabilized by the interaction between SWNTs and substrate.To get controlled AFM manipulation, a new kind of nanofabrication---nano-welding has been invented based on the AFM oxidation of Si substrate.When the Si substrate with SWNT on top of it is oxidized by the AFM tip, the newly formed SiOx will grow around the tube, effectively fixing that site of SWNT onto the Si substrate.The existence of SWNT can enhance the oxidation of Si.With same oxidation condition, more SiOx can be produced with the presence of SWNT than the case where there is no SWNT.This is helpful for the fixing.The intensity of the welding can be modulated by changing the oxidation voltage and the tip moving speed.With higher voltage and slower tip moving, stronger welding can be obtained.From the thermal oxidation of SWNTs in air and the Raman characterization, it was found that this nano-welding has no obvious influence on the chemical structure of SWNTs.Together with this nano-welding, the magnitude and distribution of strain induced into SWNT by AFM manipulation can be well controlled.Both SWNT and Si can be oxidized when using stronger oxidation condition(much higher voltage and lower tip moving speed), thus the SWNT can be cut at well defined position.Combining this AFM cutting, nano-welding and manipulation, complex SWNT-based structures can be constructed, proved the function of AFM as a nano-toolbox.2.The buckling behavior of CNTs under bending has been studied
By choosing proper manipulation site on SWNT, the length of the fragment which is being manipulated, manipulation path, and optimal tip pressing distance, the angle can be well controlled when SWNT is bent by AFM manipulation.Based on this controlled bent of CNT by AFM manipulation, A CNT with a series of different bending angles has been obtained.The interaction between manipulated SWNT fragment and substrate is largely decreased after the manipulation.And the effective bending region is located at the fragment where Only vdW interaction exists between it and the substrate.It appears as the cross point between the fixed SWNT part and
manipulated SWNT part in the AFM image.Only vdW force exists between the effective bending region and substrate, and its length keeps constant when changing the bending angle.Through recording the height change at the effective bending region when changing the bending angle gradually, The structural evolution and buckling behavior has been investigated under the bending.Two distinct „abrupt‟ and „gradual‟ buckling modes have been revealed in different CNTs.For the „abrupt‟ buckling mode, the height of the bending „point‟ has a sudden increase, and an abrupt transition from the uniform bending to buckling happens.While the „gradual‟ mode corresponds to a gradual increase of the height at the bending „point‟, with a gradual transition from uniform bending to buckling.The „gradual‟ buckling results in a series of buckling intermediate formation.„Abrupt‟ buckling mode is mostly found for small diameter CNTs, while for large diameter CNTs, the „gradual‟ mode is more common.Through the estimation of the wall numbers and thickness of CNTs, it was found that the CNTs with „abrupt‟ buckling mode has smaller thickness diameter ratio than the CNTs with „gradual‟ buckling mode.The critical buckling angle decreases with the increase of CNT diameter for the „abrupt‟ buckling mode.The buckling behavior has also been investigated by molecular dynamics(MD)simulations.It was found:(1)for all the CNTs studied, the SWNTs have “abrupt” buckling mode, and double and three walled CNTs take “gradual” buckling modes;(2)the “gradual” buckling corresponded to the process that different tube walls of MWNTs buckled at different bending stages, and the buckling degree of individual tube walls gradually increased along with the bending strain increase.This is caused by the unsynchronization of the buckling for different walls caused by the multi-shell character, and the retarding of buckling by the inter-wall vdW force.The study on the formation of the two buckling modes found that the multi-shell structure of MWNTs accounts for the “gradual” buckling modes;(3)The MD studies also proved that the vdW interaction with substrate has no remarkable effect on CNTs buckling behavior.The study on the buckling mechanism suggests that except for the diameter, the wall number also determines the buckling behavior.This means for the mechanical properties of CNTs, a special “dual-size” effect may exists, that is, both the size and the thickness determine the CNTs mechanical behavior.By using controlled AFM manipulation, the work here observed the structural evolution and buckling formation almost in the whole bending process.The founding about the two buckling modes, not only provides support and reference for the relevant theoretical study, fills the gap between theory and experiment, but also is important for the application of CNTs in composite materials, nanoelectronics and NEMs, and strain sensors.3.The resonance Raman spectroscopy of individual SWNTs under torsional and uniaxial
strain has been investigated
The AFM manipulation can induce both torsional and uniaxial strains into the ultra-long straight SWNTs.Because the longer propagation distance of uniaxial strain than the torsional strain, only pure uniaxial strain exists at region far from the manipulation point.While at region close to the manipulation sites, both the two strains happen.The formation of torsional strain suggested the rolling of SWNT under the present AFM manipulation.Both uniaxial and torsional strain can change the Raman vibrational frequency.It was found that:
(1)the RBM and G-band spectra responded differently to the two types of strains.Under torsional strain, RBM frequency RBM was found to upshift and one of the modes assigned to E2 symmetry in the G+ band, which occurs at ~1600 cm-1(G+(E2(g))), downshifted significantly, whereas the rest G
modes located in the range of 1590 cm-1~1560 cm-1 are slightly upshifted.The redshift of the(G+(E2(g)), ismuch larger that the buleshift of other G modes;(2)Under uniaxial strain, RBM and G+(E2(g))do not have noticeable response and the rest of the G modes in the range of 1590 cm-1~1560 cm-1 are downshifted.(3)Different Raman modes have different sensitivity to both strains.RBM and G+(E2(g))is more sensitive to torsion than other G modes.Whereas under uniaxial strain, other G modes have larger sensitivity than RBM and G+(E2(g)).This is related to the correlation between the C-C bond change and the atom vibrational displacement of different modes;(4)The
calculation on the strain magnitude and frequency shift of Raman modes per strains d/d found that, under torsional strain, d(RBM)/dt nearly linearly increased along with the increase of the tube chirality angle.G-band was found to split into multiple sub-bands in some cases, presumably due to broken symmetry induced by torsion.This splitting is most likely found in zig-zag and armchair SWNTs.Both the uniaxial and torsional strains can change the intensity of resonant Raman peaks.This is originated from the influence of strains on electronic tranision energy Eii.From this change, the
modulation direction and magnitude of strains on the electronic transition energy of SWNTs can be calculated.The influence of strain on the resonant Raman spectra of SWNTs has drawn much attention recently.The work here firstly experimentally studied the torsional strain effect on resonant Raman spectra of SWNTs.And the study in the single SWNT scale by AFM manipulation can exclude the average effect originated from different diameter and chiraligy.This helps to reveal the intrinsic property of SWNts.The comparison of uniaxial and torsional strain for same SWNT, also benefit the understanding of the influence of different strains on SWNTs.4.The analysis and modulation of strain distribution along SWNTs axis, and the comparison
of related mechanical parameters of different SWNTs
It was found that after AFM manipulation, both the torsional and uniaxial strain would have a “” shaped distribution along the SWNT axis, due to the friction between SWNTs and the substrate, and the partial relaxation of strain.The characteristics of the distribution, including the propagation distance of strain, the maximum strain and its position, and the slope of the strain distribution, are determined by the force exerted on SWNT by AFM tip, the elasticity modulus E and the shear modulus G, and the friction between SWNT and surface.By controlling the AFM manipulation and using patterned substrate with different components, the magnitude and distribution of strain in SWNT has been modulated.With the comparison of strain distribution in different SWNTs, their mechanical properties, such as E and G, and the friction with the substrate have been compared, on the single SWNTs scale.It was found that there is no monomial relationship between these parameters and the SWNTs diameter, this suggests that the chirality of SWNTs also has important effect on SWNTs mechanical properties.Key words:Single-Walled Carbon Nanotubes(SWNTs), AFM manipulation and fabrication, deformation(strain), buckling, resonance Raman spectroscopy
第四篇:摘要(中英文)
摘要
本次的毕业设计以工程实例为研究对象,设计过程包括结构部分,概预算部分以及施工组织部分。本工程名称为中学实验楼,建设地点为农八师132团。地基承载力特征值为fak =400Kpa。采用砖混结构,设计基准期50年,安全等级为
二级,抗震设防烈度为7.5度。本工程占地面积约512.08平方米,建筑面积2601.9平方米。本建筑五层,总高度17.1米,室内外高差为1.5 米,女儿墙高
1.5米和0.9米。
本计算书包括的内容:
结构设计部分:一.毕业设计任务书;二.工程概况及结构布置说明;三.结构计算部分:1.荷载清理(包括屋面和楼面荷载以及墙体);2.现浇构件计算(包括梁,板,);3.基础设计(包括砌体部分条基设计以及独立柱基的设计);4.砌体部分(墙体高厚比,墙体承载力验算及局部承压计算;5.抗震验算;6.楼梯计算(斜板的计算,平台梁的计算,平台板的计算);7.过梁的选择。
概预算设计是在结构设计的基础上,先计算并统计出分项工程的工程量,再运用广联达造价软件进行人,材料,机械三方面经济计算以达到对本工程的工程造价控制。
施工组织设计是针对已经形成的建筑施工图,结构施工图,结合相应的定额规范,进行各分部分项工程的工程量计算,做出工程量计算表,根据表格内各部分内容,结合时间定额和产量定额,进行劳动量的计算,在固定工期内合理的组织施工,绘制横道图,双代号网络图,时标网络图和施工平面布置图,以及人工,材料,机械需要量计划。
在设计过程中,通过查阅大量有关资料,与同学交流经验和自学,并向老师请教等方式,使自己学到了不少知识,也经历了不少艰辛,但收获同样巨大。此次设计成果有:①结构施工图10张,包括手绘5张,机绘5张;②结构计算书一本;③双代号、时标网络图一张。而且大大提高了动手的能力,充分体会到了在创造过程中探索的艰难和成功时的喜悦。虽然这个设计做的也不太好,但是在设计过程中所学到的东西是这次毕业设计的最大收获和财富,使我终身受益。最后感谢指导老师悉心的指导和帮助。
关键词:毕业设计;砖混结构;结构设计;工程量计算;施工组织设计。
Abstract
The project is a complex building named Experiments in middle school building in farming 8 division 132 groups.The build adopt reinforced concrete brick structure,the design base year is 50 years , the safe grade is 2 , and the earthquake intensity sale is 7.5.The total building area is more than 2601.9square meters.The main body is five frame
constructions.Total height is 17.1 meters.The indoors and outside height is 1.5 meters.Parapets are 1.5 meters.This thesis includes content:
Structure design:Graduate design task;Shows the engineering survey and layout of the structure;Calculation of structure: 1 Load cleaning;calculation of;2 Cast member;3 Basic design;4 Ratio of height to thickness;5 Seismic checking calculation;6 Stairs;7 Beam selection.Over budget in the structural design of the design on the basis of the cost of the use of success software in order to control of the project cost.Construction organization design used the architectural working drawings,structural drawings and combined with the corresponding norms, calculationed the engineering of the each.According to the sub-pat of the engineering project, combined with time, production scale, quantity of labor, work in a reasonable period of reasonable construction
organizationgs, drawn-on-arrow network diagram, net work time scale layout plant and construction plants.The design results are as follows: the construction of Figure 10, including hand 5, machine drawing 5;the structure calculation book;③, AOA time-scaled network diagram a.But also greatly improve the ability to operate, fully realized in the creative process of exploration,hardships and the joy of success.Although the design do not too good, but what is learned in the design process that is the biggest harvest and the wealth of the graduation design, benefit from my life.Finally, thanks to my teacher's guidance and help.Keywords: graduation design;masonry structure;structural design;engineering calculation;construction organization design.
第五篇:如何写中英文摘要
敬请重视和写好论文的中英文摘要
1.写好中英文摘要的重要性
(1)中文文摘是沟通国内读者和作者之间的桥梁。在知识爆炸的今天,读者不可能通过直接浏览刊物的方式去获取全面的信息,只能通过专业的二次文献数据库,检索相应文章的文摘,再提取原文。
(2)英文文摘是作者和国际同行进行交流的必经之路。在当今的科技领域,英语已经成为事实上的国际交流语言。世界各国学者想追踪了解某一学科的发展情况,都会用英文工具书和数据库进行检索。
2.如何写好中英文摘要
(1)摘要应概括正文的要点。一般来说,应包括研究对象(目的)、研究方法(所用的设备,材料)、结果和结论。写英文摘要时,不能因为某些内容不好翻译就弃掉要点。
(2)摘要要尽量简短,尽可能删掉课题研究的背景信息。
(3)摘要中出现的数据应该是最重要和最关键的数据。
(4)不需要目己标榜自己的研究结果。
(5)二次文献信息将脱离原文而独立存在,因此摘要中不能出现图表参数据。
(6)摘要中的内容应在正文中出现,不能对原文进行补充和修改。
(7)摘要中的缩写名称在第一次出现时要有全称(众所周知的缩写词除外)。
(8)摘要的句子应尽量简短,主谓语要搭配。