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如何寫好學術(shù)論文和中英文摘要-wenkub

2024-11-09 03 本頁面
 

【正文】 ,在簡化語句的同時,還可以減少時態(tài)判定的失誤。中文摘要對形變碳納米管(CNTs)的研究,包括研究其在應力存在下的結(jié)構(gòu)演化、應力對其各種光電性質(zhì)及電子能帶結(jié)構(gòu)的影響等,不僅對CNTs在復合材料、納電子和納機電器件、以及應力傳感器等中的應用具有重要意義,還對相關(guān)理論的發(fā)展有巨大推動作用。發(fā)展了基于Si的AFM氧化的SWNT納米焊接術(shù),以增加AFM操縱的可控性??諝庵袩嵫趸瘜嶒灪屠庾V的表征均證明,此焊接過程對SWNT的化學結(jié)構(gòu)無明顯影響。;通過選擇合適的操縱位點、被操縱的CNT片段長度、操縱路徑并優(yōu)化針尖下壓距離,可以嚴格控制彎曲CNT的角度,這樣通過AFM操縱對同一CNT的可控彎曲,獲得了一系列彎曲角度逐漸增大的CNT。發(fā)現(xiàn)不同CNTs在彎曲過程中,表現(xiàn)出“突變”和“漸變”兩種屈曲模式,分別對應于彎曲“點”高度的突躍、均勻彎曲向屈曲結(jié)構(gòu)的直接轉(zhuǎn)化,和彎曲“點”高度的逐漸增大、均勻彎曲向屈曲結(jié)構(gòu)的逐漸轉(zhuǎn)化。對“突變”屈曲模式的CNTs,臨界屈曲角度隨CNTs直徑的增大而減小。扭轉(zhuǎn)形變的產(chǎn)生證明了SWNT在AFM操縱下滾動的發(fā)生。這與形變導致的發(fā)生變化的CC鍵是否與各模的原子位移模式相關(guān)聯(lián)有關(guān);(4)通過對SWNTs中形變量大小和Raman頻率對形變變化率dw/de地計算,發(fā)現(xiàn)RBM振動頻率對扭轉(zhuǎn)形變的變化率dw(RBM)/det,隨SWNTs手性角的增大幾乎線性增大。根據(jù)共振拉曼理論和RBM峰的IAS/IS,可以計算扭轉(zhuǎn)和拉伸形變對Eii影響的方向和大小。,及SWNTs相關(guān)力學性質(zhì)的比較;分析了超長SWNT中,AFM操縱引入的應力的傳輸和分布,由于SWNT與基底間摩擦力的存在和AFM操縱后應力的部分馳豫,扭轉(zhuǎn)和拉伸應力沿SWNT管軸都呈“L”形分布,應力分布的各特征量,如應力的最遠傳輸距離、最大應力點的位置和最大應力值、應力線性分布的斜率等,決定于AFM針尖施加到SWNT的力的大小、SWNT的剪切模量或彈性模量、以及SWNT與基底間摩擦力的大?。煌ㄟ^控制AFM操縱和采用圖案化基底,對SWNT中應力的大小及分布進行了調(diào)控;通過比較不同SWNTs的應力分布特征量,在單根SWNT水平上,研究比較了它們的各力學參量,如剪切模量、楊氏模量,以及與基底間摩擦力的相對大小。(3)The MD studies also proved that the vdW interaction with substrate has no remarkable effect on CNTs buckling study on the buckling mechanism suggests that except for the diameter, the wall number also determines the buckling means for the mechanical properties of CNTs, a special “dualsize” effect may exists, that is, both the size and the thickness determine the CNTs mechanical using controlled AFM manipulation, the work here observed the structural evolution and buckling formation almost in the whole bending 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 posite materials, nanoelectronics and NEMs, and strain resonance Raman spectroscopy of individual SWNTs under torsional and uniaxialstrain has been investigatedThe AFM manipulation can induce both torsional and uniaxial strains into the ultralong straight the longer propagation distance of uniaxial strain than the torsional strain, only pure uniaxial strain exists at region far from the manipulation at region close to the manipulation sites, both the two strains formation of torsional strain suggested the rolling of SWNT under the present AFM uniaxial and torsional strain can change the Raman vibrational was found that:(1)the RBM and Gband spectra responded differently to the two types of torsional strain, RBM frequency wRBM was found to upshift and one of the modes assigned to E2 symmetry in the G+ band, which occurs at ~1600 cm1(G+(E2(g))), downshifted significantly, whereas the rest Gmodes located in the range of 1590 cm1~1560 cm1 are slightly redshift of the(G+(E2(g)), ismuch larger that the buleshift of other G modes?!靶∪宋铩痹谏鐣泄匐A、地位極其低下,生活困苦,但又逆來順受、安分守己、性格懦弱、膽小怕事,因此成為“大人物”統(tǒng)治下被侮辱的犧牲者。揭示現(xiàn)實中小人物存在的具體現(xiàn)象,生活在現(xiàn)代社會的人們,應該靜下心來反思一下,是不是自己身上也能找到小人物的影子,指出文章對現(xiàn)實的警示意義。采用磚混結(jié)構(gòu),設計基準期50年,安全等級為二級。施工組織設計是針對已經(jīng)形成的建筑施工圖,結(jié)構(gòu)施工圖,結(jié)合相應的定額規(guī)范,進行各分部分項工程的工程量計算,做出工程量計算表,根據(jù)表格內(nèi)各部分內(nèi)容,結(jié)合時間定額和產(chǎn)量定額,進行勞動量的計算,在固定工期內(nèi)合理的組織施工,繪制橫道圖,雙代號網(wǎng)絡圖,時標網(wǎng)絡圖和施工平面布置圖,以及人工,材料,機械需要量計劃。雖然這個設計做的也不太好,但是在設計過程中所學到的東西是這次畢業(yè)設計的最大收獲和財富,使我終身受益。Shows the engineering survey and layout of the structure。3 Basic design。7 Beam 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 organization design used the architectural working drawings,structural drawings and bined with the corresponding norms, calculationed the engineering of the to the subpat of the engineering project, bined with time, production scale, quantity of labor, work in a reasonable period of reasonable constructionorganizationgs, drawnonarrow network diagram, net work time scale layout plant and construction design results are as follows: the construction of Figure 10, including hand 5, machine drawing 5。masonry structure。它是在石油化學工業(yè)、能源工業(yè)、科研和軍工等國民經(jīng)濟的各個部門都起著重要作用的設備。壓力容器于密封、承壓及介質(zhì)等原因,容易發(fā)生爆炸、燃燒起火而危及人員、設備和財產(chǎn)的安全及污染環(huán)境的事故。1174326778 2013/7/16 10:59:40實習心得 在6月29號到7月18號這段日子里,裝備三個班分兩組每組四天半到金屬結(jié)構(gòu)廠參觀學習,在校期間,通過錄像學習和小組討論,同學們認真完成實習報告。AbstractWith the rapid development of the oil industry, more and more peopletake more attention to pressure plays an important role in the petrochemical industry, energy industry, scientific research,militaryand the various sectors of the national course the development of carbon dioxide vessels would take more tanks generally by carbon dioxide cylinder, head, flanges, seals, opencell and take over, bearing six major container main addition, also equipped with safety devices, meter and pletion within different production vessels due to the seal, pressure and the media and other reasons, is easy to explode, burn fire and endanger the safety of personnel, equipment and property and environmental protection pollution present, Countries all over the world use it as an important inspection , designers should be in strict responsible attitude toward every the safety ofothers and themselves.。同學們
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