多重迴歸分析 Multiple Regression Correlation Analysis

Multiple regression correlation analysis is intended for finding the extent to which independent variables have influenced on the dependent variables. The basic MRC can tell you direct effect, indirect effect, spurious effect, total effect, partial correlation coefficients and semipartial correlation coefficients, etc. You might feel it so complicated. To test hypotheses, MRC is a core course in science departments. Advanced MRC involves more independent (IVs) and dependent variables (DVs). For instance, a study is conducted by examining the product effect and user attitude. It is incorrect to analyze the DVs individually, because it will inflate the significance and increase standard error. It is called multicollinearity. For this reason, the MANCOVA (Multivariate Analysis of Covariance) and MANOVA (Multivariate Analysis of Variance) are created to test simultaneously differences among groups of multiple dependent variables. However, according to Cohen, et. al. (2003), with large number of IVs there is the risk of finding something that is not there and not finding something that is there. As a result, less is more means more statistical test validity, more power, and more meaningful results. From the perspective of science, there exist serious flaws that Taiwanese put different elections in a poll. Unfortunately, few of them realize this problem. What are your opinions on this issue?
多重迴歸分析主要是用於分析各種因素對結果的影響有多少. 簡易的分析可以計算出因素與結果之間的直接關係,間接關係,個別關係,與所有因素之間的相關性等.也許你已經感覺其複雜性,但為追求真正的前因後果,多重迴歸分析在科學研究是一門相當重要的科目.複雜的分析通常包含更多的因素與不同的結果.例如,某一研究員想知道新方法的效果及被喜歡的程度.常見的分析錯誤是一項一項檢驗;先分析效果如何再分析受測者所持的態度.由於結果之間有其關聯性(也就是所謂的共同性),分別計算的方式會誇大其結論.所以演生出MANCOVA及MANOVA(若有興趣請查Google).但科學界還是建議Less is more (Cohen, et. al. 2003).意思是少一些外來因素所得的結果才會有更多的效度.科學研究不就是要人相信結果是有效可信的嗎?社會科學當然也是一樣,所以你可以發現先進國家絕對不會將不同選舉放在一起,更不用說是用手段綁大選.但似乎台灣理解這種道理的人不夠多,才會吵鬧不休無法帶領群眾走向正途.你們覺得呢?

機場設計與高鐵站設計 Taiwan Airport Design and Taiwan Highspeed Railway Design

Taiwan airports and Taiwan Highspeed Railways commit the same mistakes. Both their terminal design focuses only on the outlays of main buildings. Though the terminals look awesome, terminal functions and concepts are hardly considered. For instance, according to Graves (2003), terminal developments should be planned on the basis of forecasts. From forecasts, the relationships between demand and the capacity of the various components of a terminal complex can be established and requirements for gate positions and terminal area space can be determined. After approximations of gate (platform) and terminal space requirements have been developed, various terminal types or concepts should be analyzed to determine which type best fits the needs of a particular airport and railway station. In selecting a terminal types, the functions of the various components of the terminal should be examined first to determine how the components will fit into the overall terminal plan. Then, airport / railway station configuration should be selected based on concept evaluation and drawings. The design should be entailed on the basis of references of airport design and transportation design. Meanwhile, design planning should consider all transportation connections for the convenience of passenger arrivals and departures. Most importantly, the environment evaluation should be done under the regulations. Do you think Taiwan airport design and Taiwan highspeed railway have been considered its functions and concepts?

台灣的機場及高鐵設計上都有相同的錯誤. 航站建築很美觀,但是卻未深入考量其功能與理念.例如, Graves 教授認為航站的設計乃基於運輸之預測.根據需求量及容量求得何種航站最合適,以提供足夠登機門(月台)及航站所需空間.當然各種型式航站的功能與部門,也要逐一評估以符合整體航站計劃.之後便可以基於理念,評估,與草圖而選擇整體航站結構和形態.設計務求詳實並參考航站或運輸設計之文獻.同時航站規劃應考量所有聯外道路交通以利乘客搭機與接送.最重要的是環境保護評估必需按規定審查.你覺得台灣機場及台灣高鐵的設計已經考量其功能與理念了嗎?