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//在google中搜不到,用google学术搜索一下就搞定啦 ****1.如何进行文献检索 我是学自然科学的,平时确实需要不少外文文献,对于自然科学来讲英文文献检索首推Elsevier,Springer等。虽然这些数据库里面文献已经不算少了。但是有时还会碰到查不到的文献,而这些文献的数据库我们所在研究所或大学又没有买,怎么办?我基本通过以下向个途径来得到文献。 1.1.首先在Google 学术搜... 阅读全文
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Conjugate Gradient Method(共轭梯度法) Goal: Make E(theta+y) smallest It selects a matrix E''(theta), and all the search directions are mutually conjugate on E''(theta). For Scaled Conjugate Gradient Method... 阅读全文
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Covariate: In design of experiments, a covariate is an independent variable not manipulated by the experimenter but still affecting the response. See Variables (in design of experiments) for an explan... 阅读全文