基于主成分分析的我国区域专利保护水平评价研究

基于主成分分析的我国区域专利保护水平评价研究

Science & Technology Progress and Policy ›› 2011, Vol. 28 ›› Issue (11) : 120-122.

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Science & Technology Progress and Policy ›› 2011, Vol. 28 ›› Issue (11) : 120-122.

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