吉林省固定资产投资结构与产业结构关联分析

运用灰色系统理论,系统研究了吉林省固定资产投资与产业产值,国内生产总值与产业投资及全社会固定资产投资等因素之间的关联度,为相关研究提供了参考。     

COMPUTING TRACE OF FUNCTION OF MATRIX

1 IntroductionIn some applications such as computational phySics, one often computes det~inant Ofmatrix and trace Of function of matrix. For ~ fun~ such as f(x) ~1/x or f(x) In (x) computing tr(f(A) ),i. e. tr(A--' ) or In(det(A) ) respeCtively, may be highly sensitiveproblems. When the matrix she n is small, we can compute these problemS explicits by usaldense ~x computation methods L6J. General speaking, such methods require O(n3) floating point OPerations. However, when n atomes larg…     

变权组合预测模型在人口增长预测中的应用

以中国人口增长问题为研究实例,利用1996～2007年各年的全国人口总数数据,采用变权组合预测方法对历年人口总数进行模拟,并进行预测,希望能够为我国解决人口问题提供帮助.