之字形運動 的英文怎麼說
中文拼音 [zhīzìxíngyùndòng]
之字形運動
英文
zigzag motion-
The relations between the mode frequency, static characteristic and the framework parameters are studied. a two dimension crossed symmetric cantilever flexure hinge is investigated using finite elements method. the simulation of the mode frequency and the study of the relation between the displacements and the stress indicate that this flexure hinge has good flexibility and linearity between the displacement and the maximum stress
研究了二維復合式懸臂梁柔性鉸鏈模態頻率、靜態特性與鉸鏈結構參數之間的關系；建立了結構參數和力學特性西北工業大學博士論文之間的對應關系;研究了基於復合式懸臂梁柔性鉸鏈的二維十字對稱柔性鉸鏈結構，對其模態頻率以及位移應力特性進行模擬試驗;結果表明此種結構形式的運動對稱性很好;其驅動位移與結構體最大拉壓應力值之間接近線性關系，而且這種結構可以得到100林m以上的運動位移。Under the horizontal earthquake action and wind force, aim at " the pure frame structure with rectangle columns ", " the pure frame structure with special - shaped columns ", " the frame - truss structure with special - shaped columns " and " frame - shear wall structure with special - shaped columns ", earthquake action analysis was done by the spacial finite element method through the changes structural parameter. analyzing systematically " structure vibration mode ", " vibration period ", " structure lateral rigidity ", " seismic action force ", " seismic response force ", " floor seismic shear force ", " lateral horizontal displacement of structure " and " members internal force ". results indicate : ( 1 ) based on equal area, the special - shaped columns replaced the rectangle columns, the structural lateral rigidity enlarges, the lateral displacement minishes obviously, the earthquake response increase slightly, the biggest increasing amount of frame columns axis - compress ratio is smaller than 0. 08. the whole aseismic performance of structure has improved ; ( 2 ) when the section ' s length and section ' s thickness ratio of special - shaped columns is smaller than 3. 6, the structure benefits to resist seismic action ; ( 3 ) the angle of horizontal seismic action with the whole coordinate is 0 degree, structure earthquake response is bigger, belonging to a control factor of structure aseismic design ; ( 4 ) the frame - truss structure with special - shaped columns and the " a " - brace has the biggest lateral rigidity ; ( 5 ) the frame - shear wall structure with special - shaped columns have bigger lateral rigidity and smaller displacement, members internal force enlarged just rightly, have much superiority of resisting seismic action ; ( 6 ) in the higher seismic fortification criterion region ( 8 degree of seismic fortification intensity ), aseismic disadvantageous building site ( iii type site ), adopting special - shaped columns structure system, should reduce possibly the building ' s self - weight in order to reduce the earthquake response ; ( 7 ) the response spectrum method of computing seismic response and the time - history analysis method have similar analysis result
西安理工大學碩士學位論文在水平地震作用下，並考慮風荷載組合，分別對「矩形柱純框架結構」 、 「異型柱純框架結構」 、 「異型柱框一析架結構」及「異型柱框-剪結構」等四種結構體系，通過改變結構參數，運用空間有限元方法，進行地震作用計算。系統地分析研究「結構振型」 、 「振動周期」 、 「結構側向剛度」 、 「結構地震反應力」 、 「樓層地震剪力」 、 「結構側向位移」 、 「層間位移角」 ，以及「構件內力」 。結果表明:在等面積原則下，異型柱代換矩形柱后，結構剛度增大，側向位移明顯減小，地震反應力略有增加，框架柱軸壓比最大增幅小於8 % ，結構整體抗震性能有所提高;當異型柱肢長肢厚比小於等於3 . 6時，結構有利於抗震;水平地震作用力與整體坐標夾角為0度時，結構地震作用效應較大，屬結構設計的控制因素之一;異型柱框一析架結構採用「人」字斜撐，側向剛度大於「八」字斜撐和「人一八」字混合斜撐;異型柱框一剪結構側向剛度大、位移小，構件內力增大適中，是一種抗震性能優越的結構體系:在抗震設防烈度較高地區（ 8度）和抗震不利的建築場地（ m類場地） ，採用異型柱結構體系時，應盡可能減輕結構自重，降低地震作用力;分別採用「振型分解反應譜」法和「時程分析」法進行地震作用計算，兩種方法所得結果基本一致。Through expounding the concept of tax planning, the objective condition of tax planning, the rationality and the certainty of tax planning under current tax system, the preparation of tax planning and the method of tax planning, combining the concrete conditions of jinan weiming industry company, integrating the practice with the theory, the thesis adopts the method of qualitative and quantitative analysis, provide an overall tax planning for jinan weiming industry company on such 9 fields related to tax as the taxpayer ' s identity of value - added tax, buying and selling activities, hotels renting and pooling, freight charges, enterprise present, economic contracts, bad account transfer, advertisement models and depreciation with the aid of the number analysis, the charts and the mathematic tools
本文在通過對納稅籌劃概念、納稅籌劃產生的客觀條件、現行稅制下企業納稅籌劃必然性和合理性的分析、納稅籌劃的準備工作以及納稅籌劃方法進行理論闡述之後，結合濟南偉民實業總公司的具體情況，通過理論聯系實際，採用定性與定量分析相結合的方法，藉助于數字分析，表格，數學工具等形式對濟南偉民實業總公司包括增值稅納稅人身份、購銷活動、酒店出租與聯營、運費、企業捐贈、經濟合同、壞帳轉銷、廣告宣傳方式和固定資產折舊等九個涉稅事項進行了納稅籌劃。通過本論文的撰寫，幫助濟南偉民實業總公司通過合理納稅籌劃，提高企業經濟效益，增強企業競爭力。Secondly, in order to improve the effective of machining process, for the tool - path planning, this system come up with a way which both tool arm coordinate the movement in the same time, and used the process pattern of move toward opposite side and cutting in row, avoided the cutting tool interference effectively ; for this tool - path this paper use the way of making the cutter contact data by the second development of solidworks, and gained the cutter location data through the interference check
其次，為了提高磨削效率，在刀具路徑規劃方面，採用了雙刀協調運動、相向走刀加工的加工方式，採取變形的「之」字形走刀模式，從而有效的避免了刀具干涉，提高了加工效率。並針對上述的加工方式，對刀位軌跡生成演算法進行了研究，根據機構的特性，基於截面法生成刀具軌跡，通過solidworks的二次開發來獲得牙齒模型的三維表面數據，再利用干涉檢查生成無干涉刀位點數據。The paper is based on the project of " the research of mathematics and computer frequency dynamic simulation theory on knobs not result ". the research content is object to the image of log knobs by vidicon getting to detect the shape of log knobs according to the method of video disposal. the paper apply digital image processing technology to log knobs image to swell and detect borders, then distill the surface shape and characteristic parameter of knobs. the thesis depict the knobs three - dimensional models, build the mathematics models of log knobs and simulation two - dimensional image curve of the log knobs primary section which has been discerned, thereby achieve our researching aim to reappear the knobs image on computer
本論文是國家自然科學基金資助項目「節子ndt結果的數學描述與視頻動態模擬理論的研究」的基礎研究之一，論文的研究內容是通過視頻處理的方法檢測原木表面節子的形狀，以攝像機採集的原木表面節子圖像為對象，運用數字圖像處理技術對節子圖像進行修正、增強、邊緣檢測等處理，提取節子的形狀特徵參數，並運用數學的方法，歸納總結其規律，應用數學的方法對節子的二維模型進行描述，建立原木節子的數學模型，對識別出的原木節子主截面的三維圖像曲線進行擬合處理，從而在計算機上實現節子的分佈與形態的再現，達到研究節子的空間形態和分佈規律的目的。分享友人