6 research outputs found

    Design and Implementation of Students' Psychological Problems Communication System Based on Android

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    随着无线通信技术和互联网的发展,智能终端发展迅速,特别是基于 Android操作系统的系统更是与当前的社会经济相互渗透,这也为学生心理问题 交流的发展奠定了基础,在这种背景下,本系统结合当前社会学生心理问题现状, 利用互联网技术和学生心理问题相关理论以及学生心理问题定律技术实现了对 当前学生心理问题的多项指标的远程实时监控,同时,本系统依托Android操作 系统UI界面人性化、源码开放、使用十分广泛以及封装良好等优势,利用Android 操作系统在系统领域的绝对权威,推广和普及该系统,对于我国学生心理问题交 流系统的发展,缓解社会学生心理问题难题具有重要的理论和现实意义。 本...With the development of wireless communication technology and Internet, mobile intelligent terminal development rapidly, especially based on the mobile platform Android operating system is more in-depth into all areas of economic and social life, which also laid the foundation for the development of mobile communication forum, the psychological quality of the students, in this context, the cu...学位:工学硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323073

    Study on The Assembly Technology of Micro Spherical Joints

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    微球接頭是由圓球與球殼兩個元件所組裝構成的,其能夠提供多角度和多方向的自由度,不但能改變運動方向,還能承受一定量的負荷,有相當大的發展潛力。然而在微米尺寸等級時,由於生產與製作不易限制了其應用的範圍,對此本研究設計其以機上微組裝技術來製作微球接頭,首先加工製作出微圓球與微球殼,接著藉由微球殼材料自身的彈性變形,直接在生產製作微圓球與微球殼的機台進行組裝。此方法可省略物件的夾持交換,減少夾持誤差,相對位置準確。 為了瞭解此機上微組裝方法之組裝情形,本研究先採用可靠度工程中常用之失效模式、影響與關鍵性分析(Failure Mode, Effect and Criticality Analysis, FMECA)來判斷微球接頭可能的失效情形,發現倘若微圓球和微球殼之幾何形狀設計不良,除了會造成組裝過程中微元件的損壞,導致組裝失敗,也會使裝配後的微球接頭間隙不適當而造成效能不佳。對此本研究利用有限元素法配合電腦數值軟體ANSYS來解決這個問題,針對組裝過程中微元件的變形情況做模擬分析探討。藉由模擬所獲得的資訊,可改善組裝的品質,確保此組裝方法之可行性與實用性。 由研究結果顯示,由於微球殼是薄殼時之徑向變形量比厚殼時來的大,且在開口角度170度時有最大的可容許徑向變形量;若當微球殼的半徑大小固定時,組裝後預得到適當餘隙配合之微球接頭,則與之配合之微圓球以選擇開口角度170度較佳,半徑大小則依間隙和微球殼的變形量來決定。 關鍵字:機上微組裝、微球殼、變形模擬、失效分析、間隙配合。The micro spherical joint assembled by precision a micro spherical ball and shell has great potential for application to the micro robots and machines. It can not only deliver the force and moment but also supply high freedom of movement. It is very simple and easy to operate on the machine using the elasticity deflection for the assembly of the micro ball and shell. In order to know the reliability of the micro spherical joint, reliability analytical tools such as failure mode effect and criticality analysis (FMECA) and fault tree analysis (FTA) are used. According to FMECA and FTA, the dimensional mistakes and assembly load were the main factors making the micro joint failure. In order to overcome the problem, deflection of micro spherical shell were simulated under the various conditions of shell angles, radius, and thickness for some materials by means of the finite element method and computer-assisted numerical program ANSYS. The simulated results based on deflection would be helpful for designing the dimension of the micro assembly parts and handling the correct clearance of joints. Keyword: micro assembly, micro spherical shell, deflection simulation, FEMCA, gap analysis.目錄 致謝……………………………………………………………………Ⅰ 中文摘要………………………………………………………………Ⅱ 英文摘要………………………………………………………………Ⅲ 目錄……………………………………………………………………Ⅳ 圖目錄…………………………………………………………………Ⅶ 表目錄…………………………………………………………………XI 第一章 緒論……………………………………………………………1 1.1 研究背景…………………………………………………………1 1.2 文獻及現有技術回顧. …………………………………………………. 18 1.2.1 機上微組裝之技術回顧. ………………………………………….. 18 1.2.2 球狀元件之微加工技術回顧. …………………………………….. 21 1.3 研究動機與目的. ………………………………………………………. 29 1.4 研究流程. ………………………………………………………………. 31 1.5 論文架構. ………………………………………………………………. 33 第二章 研究相關理論與方法介紹. …………………………………… 34 2.1 球殼之線彈性變形理論………………………………………………... 34 2.2 有限元素軟體ANSYS分析方法. ……………………………………... 39 2.2.1 有限元素法與ANSYS簡介. ……………………………………… 39 2.2.2 基本原理. ………………………………………………………….. 40 2.2.3 有限元素法與ANSYS分析流程. ………………………………… 42 2.3 可靠度分析方法. ………………………………………………………. 44 2.3.1 可靠度的數學概念. ……………………………………………….. 44 2.3.2 系統的可靠度模式. ……………………………………………….. 45 2.3.3 失效模式與關鍵性分析. ………………………………………….. 47 2.3.4 失效樹分析之簡介與符號. ……………………………………….. 52 第三章 微球接頭之失效模式分析. …………………………………… 58 3.1 失效模式與關鍵性分析. ………………………………………………. 59 3.1.1 微球接頭組裝系統之功能方塊圖與可靠度模式建立…………… 59 3.1.2 微組裝系統各細部元件之失效模式分析………………………… 62 3.1.3 失效影響性與機率性分析………………………………………… 64 3.1.4 失效關鍵性評估…………………………………………………… 65 3.2 失效樹分析……………………………………………………………... 71 3.3 結論……………………………………………………………………... 72 第四章 微球殼結構之變形模擬………………………………….. 75 4.1 分析模型………………………………………………………………... 76 4.1.1 合理的簡化分析…………………………………………………… 77 4.1.2 模擬假設…………………………………………………………… 80 4.2 模擬規畫與流程………………………………………………………... 81 4.2.1 模擬規劃…………………………………………………………… 81 4.2.2 模擬流程…………………………………………………………… 87 4.3 模擬結果與討論………………………………………………………... 88 4.3.1 材料性質對『可容許的最大徑向變形量』之影響……………… 88 4.3.2 開口角度對『可容許的最大徑向變形量』之影響……………… 90 4.3.3 厚度對『可容許的最大徑向變形量』之影響…………………… 96 4.4 結論……………………………………………………………………... 98 第五章 微球接頭之間隙分析…………………………………….. 99 5.1 基本模型與幾何關係的建立…………………………………………... 101 5.2 微球接頭間隙配合之探討……………………………………………... 103 5.2.1 鬆配合……………………………………………………………… 106 5.2.2 餘隙配合…………………………………………………………… 108 5.2.3 緊配合……………………………………………………………… 110 5.3 分析結論………………………………………………………………... 111 第六章 總結與未來展望………………………………………….. 112 6.1 總結……………………………………………………………………... 112 6.2 未來工作………………………………………………………………... 113 參考文獻…………………………………………………………….. 114 作者簡

    单细胞电泳观察重离子辐照人肝癌细胞所致DNA损伤

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    目的 研究重离子对肿瘤细胞DNA的损伤程度 ,为重离子治癌的临床应用积累必要的基础数据。方法 用 80MeV u氖离子射线诱发SMMC 772 1细胞DNA辐射损伤 ,利用单细胞凝胶电泳 (singlecellgelelectrophoresis ,SCGE)实验方法处理细胞 ,并对结果进行统计分析。结果 氖离子辐照以剂量依赖的方式引起SMMC 772 1细胞DNA迁移长度的增加 ,且拖尾长度与剂量呈线性正相关 ;同时 ,拖尾的细胞数 (即损伤的细胞数 )在剂量大于 2Gy时 1 0 0 %细胞损伤。结论 重离子射线对DNA有强致损效应

    抑制劑對某電廠廠用冷卻水系統黏稠物控制之研究

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    某電廠廠用冷卻水中 ,以加入鉬酸鹽系緩蝕劑的方法來抑制管路的腐蝕,在測緩蝕劑對腐蝕的抑制效果時,卻發設備表面生成的透明泥濘物會加速設備腐蝕。故為延長管路之壽命,本研究的主要目的在分離泥濘物中之微生物,鑑定出其菌名,其試驗防制泥濘物生長之藥劑的效果。結果顯示:廠用冷卻水透明泥濘物中含有桿菌、絲狀菌等微生物菌群,且從透明泥濘物中分離得到6株純種菌株。商用抑制劑P無法抑制廠用冷卻水原水中之菌群及純種菌株生長,而商用抑制劑K、非商用抑制劑N及H可抑制廠用冷卻水原水中的菌群及純種菌株生長,且抑制效果為:非商用抑制劑N>非商用抑制劑H>商用抑制劑K。In the presence, molybdate is added as corrosion inhibitor to the cooling water system of one power plant. Monitoring the inhibitory efficiency of corrosion inhibitor, it was found that the slime generated from the cooling system was accelerating t he corrosion of the cooling system. In order to avoid the corrosion of the cooling system, the main purpose of this research is to isolate and identify the bacterium strains from the slime. The inhibitory efficiency of antimicrobial agents to these strains was examined, in order to find the appropriate type and dosage of the antimicrobial agent. The result showed that the cooling water contains rod-shaped bacteria and filamentous microorganism. Six strains were isolated from the slime of the cooling water system. Commercial antimicrobial agent P could not inhibit the growth of the six strains and the slime of the cooling water system. Commercial antimicrobial agent P and Noncommercial antimicrobial agents N, H could inhibit the growth of the six strains and the slime of the cooling water system. The inhibitory efficiency sequences were noncommercial antimicrobial agents N, noncommercial antimicrobial agents H and commercial antimicrobial agent P
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