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The paper presents the principle and calculation process of the principal component analysis which is a useful method of water quality assessment. Eight indicators include dissolved oxygen, permanganate index, BOD, ammonia nitrogen, copper, zinc, volatile phenol, oil in 20 monitoring sections of Ningbo urban river were analyzed by using principal component analysis. Three factors with 86.67% of accumulated...
China is a big developing country in the way of industrialization and so that manufacturing will be the dominate industry in a long run. In the situation of manufacturer role, comparatively inferior status of Global Value Chain, unbalanced factor endowment and fade-away of traditional comparative advantage, stressed by severer international competition and global financial crisis, it is imperative...
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