So , by the end of 1980s , relatively few scholars accepted the theory of factor proportions and comparative advantage as an adequate explanation of the observed patterns of trade 這些新現(xiàn)象引發(fā)了人們對傳統(tǒng)貿(mào)易理論的反思。 20世紀(jì)70年代末以來,國際經(jīng)濟學(xué)家開始提出一些新的理論來解釋日趨復(fù)雜的國際貿(mào)易。
Because observing patterns to be recognized from multiple sensors can well and truly reflect the features of them , eliminate the uncertainty of the information . pattern recognition methods based on information fusion have already been one of the development trends of pattern recognition field 從多傳感器視角觀察待識別模式能夠完整準(zhǔn)確的反映模式特征,消除觀察信息的不確定性,因此,基于信息融合的模式識別方法已成為模式識別的發(fā)展趨勢之一。
We also examine the performance of this simple test under a variety of biologically realistic conditions , develope a monte carlo procedure to test the homogeneity of the observed patterns , and compare it to kumar and gadagkar ' s test by computer simulation as well as empirical data analysis 我們在各種不同的生物學(xué)條件下檢查了這個檢測的效能,發(fā)展了一個montecarlo方法來檢測觀察到模型的同質(zhì)性,并通過計算機模擬和真實數(shù)據(jù)的分析,比較我們的卡方檢測與kumarandgadwtar的id檢測之間的效能差異。