valid dimension 中文意思是什麼
valid dimension
解釋
有效維度-
In addition, the author find that the two indices : c / p and e / p are not valid indices to distinguish value stock from glamour stock, and two - dimension indices have better ability to distinguish value stock from glamour stock than one - dimension indices, which is same as lsv ( 1994 ). finally, the evidence of return mean - reverting from this chapter support the ideas of debondt & thaler ( 1985 ) on stock overreaction
而且作者發現c用和e護指標並不是劃分價值投資組合和魅力投資組合的有效指標。而且二維指標對價值投資組合和魅力投資組合的區分能力高於一維指標，這與lsv （ 1994 ）的結論相同。最後，價值組合和魅力組合在組合形成前後的收益率反轉現象也支持了debondt & thaler （ 1985 ）有關股票市場存在過度反應的觀點。 -
With the development of automobile industry and road transportation ， the traffic accidents happen every day in the world and become a serious society problem the vehicle collision accidents are over 2 / 3 times as much as all traffic accidents they cause a large amount of social infuence and serious economic loss therefore ， it is urgent to study vehicle collision accidents comprehensively and systematically ， and the research also is the academic foundation to analyze and deal with traffic accident it is difficult to authenticate car velocity after traffic accident to dig over locate witness is right way mechanics is avaid tool in this field it is important to establish math model and this is precondition to calculate vehicle velocity firstly on the basis of summarizing the research results ， this paper deeply discusses the calculating model to analyze the instantaneous motion state in the vehicle collision, the interrelation among the every moving mechanics parameters in the every phase of the collision secondly ， according to the collinear collision and two - dimension collision and the restitution coefficient ， the paper estabishesthe post collision movement models it proves that these models are correct and valid thirdly ， this paper try to research reconstruction of road traffic accident and put forward the method on it
對交通事故的科學分析應是建立在正確的數學模型與計算機模擬技術基礎上的定量分析，其基本條件就是要有能正確描述事故過程中汽車狀態的數學模型，只有建立正確的數學模型，才能較準確地推定事故車輛的碰撞速度。所以建立正確地車輛碰撞模型和運動模型正是汽車事故再現的關鍵問題。本文首先在總結前人研究的基礎上，深入地研究汽車碰撞理論，分析了車對車碰撞作用瞬間狀態的計算模型及碰撞恢復系數與碰撞前、后速度的關系；其次，根據交通事故中最普遍的一維和二維碰撞的不同情況，採用恢復系數和滑動摩擦系數等概念，分別建立了碰撞后車輛動力學模型；第三，對汽車碰撞事故再現進行了初步研究，確定了車對車碰撞事故模擬計算和反推計算方法，並給出相應的模擬程序流程圖。 -
Abstract : a optimum design method in which the optimum shapes and dimension of cross sections are selected to minimize the structural volume and get the global optimum solution, is presented first by means of the method of the genetical gorithm. the numerical results show that the model is valid
文摘:利用遺傳演算法，首次提出「取剛架截面形狀和尺寸規格為設計變量，結構體積為目標函數，求全局最優解」這一優化模型.通過對各個計算環節的研究，確立了可行的計算方法，編制計算程序，並以算例證明該方法的有效性 -
Non - uniformity of the amplifying effect and dimension of the slope are pointed out through analysis of the distribution of the stress and sonic speed in the slope. forms of slope lost stability resulted from blasting vibration are analyzed and appraising rules of slope stability are summarized by a great deal instances on coasts. based on general discussion about calculation methods of the slope stability under the effect of blasting vibration, the synthetical method, a new one, is put forward, analyzed through a sample by and pointed out which is one of most valid methods
利用波動理論，得出延期時間為nt / m時減震效果最好；在分析邊坡巖體內部應力、質點速度等分佈規律的基礎上，指出邊坡震動放大效應的不均勻性和邊坡尺寸效應；結合大量滑坡實例，分析了爆破震動引起邊坡失穩破壞的幾種形式，總結出邊坡穩定性評價準則；基於對邊坡穩定性計算方法的綜合分析，提出了一種綜合分析方法，通過算例計算分析，證明該法計算精確度高、功能全面，是邊坡動力穩定性分析的有效方法之一。 -
Based on the review of the concepts, measure method of subjective well - being, and the current research situations of college students " subjective well - being, the paper made a tentative study on the dimension of subjective well - being, the characteristic of college students " subjective well - being and the relationship between subjective well - being and personality traits. the assessment scale we used was made up by ourselves and it was a reliable and valid instrument
本文在對主觀幸福感的概念、測量方法及國內大學生主觀幸福感研究現狀進行評述的基礎上，採用自編的大學生主觀幸福感問卷經信度效度檢驗后對大學生主觀幸福感結構和特點進行初步探討，同時對主觀幸福感與人格特徵的關系進行研究。 -
Due to disadvantage of fusion method generally, in this paper, the advantage of neural network based is used, these advantage include the ability of real - time processing data, the ability of knowledge overflowing and tolerance mistake of structure. taking the image of obstacle from ccd vidicon, these image must pretreat. and distill valid feature, at the same time, provide third dimension distance information from ultrasonic sensor group
在本文中，利用基於神經網路的信息融合方法的實時處理大量數據的能力、知識泛化能力以及結構的容錯性等優點，把ccd攝像機攝取的障礙物圖象，進行預處理並且提取有效特徵，同時有超聲波傳感器組來提供其第三維的距離信息。 -
The mechanical system using to the new technology, engineers can build system model in computer, and simulate the characteristic of kinematics and dynamics of mechanical system on realistic condition, by the valid numeric algorithm, well - round three dimension visualization technology and standard gui technology. according to the analysis results, engineers can improve or optimize mechanical systems ? designing projects and its running process. the mechanical system virtual prototyping technology can help enterprises to reduce the trial - manufacture times of physical prototyping, so that can shorten periods of designing and producing, consequently reduce the costs and improve the quality of products
藉助于這項技術，工程師們可以在計算機上建立機械繫統的模型，伴之以有效的數值演算法、成熟的三維可視化技術以及標準的圖形用戶界面，模擬在現實環境下機械繫統的運動學和動力學特性，並根據模擬結果改進或優化機械繫統的設計方案與工作過程，幫助企業最大限度地減少物理樣機的試制次數，從而縮短設計和生產周期，降低成本，提高產品質量。
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