cross-sectional research 中文意思是什麼
cross-sectional research
解釋
截面研究-
This paper established optimization mathematical models with the structural reliability constraints based on the structural reliability analysis. in this paper, truss and beam structures are studied as the research objects and the structural elements cross sectional areas as the design variables
在結構可靠性分析的基礎上，構建了以桿、梁截面積為設計變量，使結構重量極小化為目標函數，同時具有應力和位移可靠性約束的優化設計數學模型。 -
Mark lang, russell lundholm. cross - sectional determinants of analyst ratings of corporate disclosures [ j ]. journal of accounting research, 1993, 31 ( 2 )
張宗新，郭來生等.上市公司自願性信息披露的有效性研究[ r ] .深圳證券交易所綜合研究所研究報告， 2004 。 -
The second part is an overview of the literature, mainly focus on the definition and the measurement of diversification, and review the empirical literature of diversification. there are many methods to define the diversification, two of them are cross - sectional. they are two streams of research literature, industrial organization economic and strategic management
本文通過實證分析，驗證了在我國製造業中，企業規模、企業年齡和資產利潤率與多角化經營存在顯著的正相關關系;現金流量與多角化經營存在正相關關系;負債凈值比率與多角化經營之間不存在相關性。 -
With the kalman filter approach, the empirical research shows the model reconciles the time - series dynamics of yields with the cross - sectional shapes of the term structure
通過卡爾曼濾波法對模型的實證分析，證實該模型基本上能在時間序列和橫截面兩個維度上與實際數據相符合。 -
We rank stocks and make portfolios according to various kinds of risk factors from 1997 to 2002, and test in method of cross - sectional regression. we find that # and stock and portfolio returns lack significant relation, on the contrary, two easily measured variable, market equity and book - to - market equity, combine to capture the cross - sectional variation in stock returns. this conclusion proves that the size effect and value effect exist in shanghai stock market during the research period of this thesis
通過將1997年到2002年股票收益率數據按各種風險因素進行排序、分組的討論，以及橫截面回歸的檢驗，本文發現與股票組合收益之間缺乏顯著的相關性，相反流通市值和賬面市值比這兩個易於測度的變量一起捕捉了股票收益橫截面的變化，這一結論說明上海股市在本文的研究期間內存在規模效應和價值效應。 -
In this paper, we estimated the magnitude and the proportion of the aged poor population by rural and urban and by provincial - level category in shandong, based on the fifth national census and the " china cross - sectional rural - urban elderly sample survey " conducted by the china aging research center in december 2000
摘要本文利用第五次人口普查數據和中國老齡科研中心於2000年12月組織的「中國城鄉老年人口狀況一次性抽樣調查」數據，經過加權處理后對山東、以及山東分城鄉的貧困老年人口的比例和數量進行了估計。 -
Therefore, the original optimization model is transformed into the problem of cross sectional area optimization. this paper had great research on the development of optimization algorithm by analyzing typical optimal search method, such as greedy algorithm, simulated annealing algorithm, neural network and genetic algorithm ( ga ). according to the characteristics of truss structure, we choose genetic algorithm as the solution way
本文在研究優化演算法發展過程的基礎上，分析了典型的優化搜索方法：確定性演算法如貪婪演算法，隨機搜索演算法如模擬退火演算法，人工智慧演算法如神經網路及遺傳演算法，根據桁架結構優化的特點，最終選擇以遺傳演算法作為桁架結構優化設計的主要演算法。 -
The measurement and assessment of mental health : a longitudinal and cross - sectional research on undergraduates, adults and patients
大學生與成人及住院病人的縱向橫向研究
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