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20xx屆碩士研究生學(xué)位論文摘要機(jī)械電子工程論文題目:物理氣相沉積ti-展示頁

2024-09-03 11:58本頁面
  

【正文】 ng Ti, Si and N particles, including adsorption of incidence particle, diffusion, nucleation, growth of cluster, and so on. The effects of process parameters on microscopic structure and morphology of coatings are discussed by analyzing the simulation results. We try to improve the simulation algorithm, make own KMC programs, and simulate the movement of adsorption particle on the surface, which based on an understanding of the characteristics and limitations of Monte Carlo method and Molecular Dynamics method. In our model, the concept of active particle is introduced. We consider not only the hopping possibilities of all the active particles on the surface but also the interaction changes happened between near neighbour particles after every hop. We get statistic data of clusters by distinguishing different colors which clusters possesed. This software is designed under the Visual environment. User can input variables conveniently and watch the movement of particles. For the deposition process of metal Ti, the simulation results showed that the number of nucleation point is relative large and the size of clusters is small when temperature is low. By contraries, the possibilities of forming larger cluster increased and spacing between clusters diminished with clear crystal boundary. And data displayed that roughness became smooth. The growth of film was in the model of 3D Volver Weber and the surface roughness increased with incidence velocity raising. In addition, statistical data showed strong interaction force between adatom and substrate. Based on Ti films growth simulation, we executed the simulation of TiSiN ternary film growth under different conditions, from which we have got better understanding about the formation of TiSiN nanoposition coatings. Key words: Physical Vapor Deposition(PVD), Computer Simulation, Film Growth, Cluster, Kiic Monte Carlo Method(KMC) 3 論文題 目: 基于訂單生產(chǎn)的面向地方中小型制造企業(yè)ERP系統(tǒng)的研究與開發(fā) Research and Development of ERP System for Local Small and Medium Manufacturing Enterprise of Make to Order 研究生姓名: 董曉慧 導(dǎo)師姓 名: 楊建鳴 教授 專 業(yè): 機(jī)械電子工程 摘 要: ERP,即企業(yè)資源計劃,是二十世紀(jì)九十年代發(fā)展起來的綜合企業(yè)管理信息系統(tǒng)。隨著信息技術(shù)的不斷發(fā)展,中小型制造企業(yè)信息化建設(shè)變得越來越重要,為了適應(yīng)當(dāng)前信息社會激烈的市場競爭,中小型制造企業(yè)有必要實施先進(jìn)的 ERP系統(tǒng)來提高企業(yè)自身的競爭力,同時,許多中小型制造企業(yè)采用的是基于訂單生產(chǎn)的生 產(chǎn)模式,強調(diào)以銷定產(chǎn)。本課題針對這一主題展開研究,開發(fā)了一套基于訂單生產(chǎn)的面向地方中小型制造企業(yè)的 ERP 系統(tǒng)。重點介闡述了 ERP 系統(tǒng)的需求分析,系統(tǒng)結(jié)構(gòu)設(shè)計,重點是 B/S 模式和 C/S 模式相結(jié)合的信息系統(tǒng)開發(fā)技術(shù), 數(shù)據(jù)庫設(shè)計,模塊結(jié)構(gòu)設(shè)計,部分功能界面設(shè)計和程序代碼實現(xiàn)。最后論文提出了進(jìn)一步的研究方向。 本論文從課題組現(xiàn)行研制的超磁致伸縮換能器出發(fā),進(jìn)行了換能器輸入輸出特性的理論研究與實驗研究,力求得到超磁致伸縮換能器更為普遍意義上的數(shù)學(xué)模型,從而為超磁致伸縮器件的設(shè)計提供理論依據(jù)與方法,指導(dǎo)超磁致伸縮器件的設(shè)計與優(yōu)化。 2. 利用壓應(yīng)力下材料的磁致伸縮與磁化強度的關(guān)系,模擬了課題組研制的換能器中超磁致伸縮材料的磁致伸縮性能。并利用現(xiàn)有的有限元分析軟件 ANSYS模擬了換能器輸入電流與輸出位移的關(guān)系曲線。 5. 對課題組 研制的超磁致伸縮換能器進(jìn)行了實驗研究,檢驗了靜態(tài)特性模型與動態(tài)特性模型建立的正確與否,同時通過實驗找到了現(xiàn)有設(shè)計中存在的問題。隨著社會的進(jìn)步和科學(xué)技術(shù)的發(fā)展,人們對產(chǎn)品的質(zhì)量提出了越來越高的要求。為此,本文針對多指標(biāo) (變量 )多工序過程對質(zhì)量診斷方法進(jìn)行了進(jìn)一步的研究。 (2) 介紹了兩種質(zhì)量診斷理論的基本原理,并指出了 它存在的一些不足,根據(jù)它的不足提出了基于神經(jīng)網(wǎng)絡(luò)的兩種質(zhì)量診斷理論,最后將新方法進(jìn)行仿真研究以驗證該方法的有效性。 (4) 簡要介紹了 CSP 生產(chǎn)線的生產(chǎn)流程,并將基于神經(jīng)網(wǎng)絡(luò)的質(zhì)量診斷方法應(yīng)用到 CSP生產(chǎn)線中進(jìn)行可行性和有效性驗證。 關(guān)鍵詞 : 質(zhì)量診斷,主元分析,神經(jīng)網(wǎng)絡(luò),費歇貢獻(xiàn)圖 ABSTRACT The quality of products was an important flag to symbolize the developing level of the productivity, the technology and the economics in a country. With the advancement of the society and the development of science and technology, the requirements to the quality of products bee higher and higher. When the abnormality occurred in the process of quality control, it was necessary to use quality diagnosis method to diagnosis production line in order to adjust the process parameters timely and make quality parameters return to the normal condition. In this thesis the quality diagnosis methods applied to multiindex(variable) and multioperation process were made a further research. The main work of this 7 thesis were described as follows: (1) The concept of quality and the formation and development of the quality science were introduced. then the methods of univariate statistical process control, the basic theory of principal ponent analysis(PCA),multivariate statistical process control based on PCA and some improvements were described respectively. In the end statistical process diagnosis methods were described briefly. (2) The basic theory of twokindsofqualitydiagnosistheory was introduced, then some deficiencies in traditional two kindsofqualitydiagnosistheory were pointed out. So a method of twokindsofqualitydiagnosis based on neural works was presented. The new method was pared with the traditional method to validate its effectivity. (3) A new process parameters diagnosis method based on the fisher contribution plot was presented according to the principle of Fisher discriminant analysis. The new method and PCA contribution plot were all applied to the quadrupletank process to diagnose process parameters. The diagnosis results showed the difference of the two methods. (4) The production flow of CSP production line was described briefly, then the method of quality diagnosis based on neural works was applied to CSP production line to validate its feasibility and effectivity . Finally, the thesis was concluded with a summary and the prospect of the quality diagnosis theory was discussed. Key words: Quality Diagnosis, PCA, Neural Networks, Fisher Contribute Plot. 論文題 目: 基于 Web 的面向產(chǎn)品開發(fā)過程的客車 PDM 系統(tǒng)的研究與開發(fā) Research and Development of PDM System on Bus Oriented to Product Developing Process Based on the Web 研究生姓名: 王翠表 導(dǎo)師姓 名: 李 強 教授 專 業(yè): 機(jī)械電子工程 摘 要 : 分析了國內(nèi)外產(chǎn)品數(shù)據(jù)管理系統(tǒng)的特點,結(jié)合客車行業(yè)的實際需求以及對客車產(chǎn)品開發(fā)過程數(shù)據(jù)信息的全面分析,運用 Web 技術(shù),分布式數(shù)據(jù)庫技術(shù)、面向?qū)ο蠹夹g(shù)、成組技術(shù),開展了基于 Web 的面向產(chǎn)品開發(fā)過程的客車產(chǎn)品數(shù)據(jù)管理系統(tǒng)的研究與開發(fā)。通過系統(tǒng)實例,給出了應(yīng)用本系統(tǒng)的過程與方法。 關(guān)鍵詞 :客車;產(chǎn)品開發(fā);產(chǎn)品數(shù)據(jù)管理系統(tǒng); Web; ASP ABSTRACT Analyzing the characteristic of the PDMS inside and outside china, through the factual demand of the bus vocation and based on the whole analysis of data in
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