网络非正定矩阵 网络释义 1. 非正定矩阵 所求出之歷史相关系數矩阵为非正定矩阵(non-positive definite),但是经由使 nccuir.lib.nccu.edu.tw|基于2个网页
1.首先想到是数据不好2.是否重金属原子类型搞错?3.强点/变量参数比特别小?数据太弱要命,可能要加写AFIX 66,或有些各向同性酸了.4.有坏点?.lst中看,删几个试试5.吸收校正没做好?重做.6.O投成N,C或者N投成O?或者Na,Cl等投成O了?以上各问题都没有?加一些isor之类的restrains 试试吧.
Fractional Fourier transform properties of lenses or other optical environments are applied to one or more positive-definite optical transfer functions at locations outside the Fourier plane to realize or closely approximate arbitrary non-positive-definite transfer functions varying in both amplitude and ...
出现非正定了,可以用ISOR这个命令,用各向异性的方式向同性的方向修正,你可以试一下。 xi2004 可能原因 1. 空间群定低了 2. 数据不够强, 点弱, 可观察点不够 3. 原子类型定错了, 比如O定成 C xiaohuiyi 楼: Originally posted by 尚云凤 at 2011-12-14 08:55:29: 出现非正定了,可以用ISOR这个命令...
请问：我在用xseed做各向异性的时候，说有两个原子non-positive definite！请问是怎么造成的？如何解决...
THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NON-POSITIVE DEFINITE FIRST-ORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS 0.176D-...
It doesn´t need the variational principle and can be applied to solve non-positive or positive definite partial differential equations with arbitrary variable coefficient. 该方法不用一般的变分原理,可适用任意变系数正定和非正定偏微分方程。利用这一方法得到一个新的八节点四边形平面应力单元。 4. Accordi...
When a Fusion Simulation fails, the following message appears: Error: STIFFNESS MATRIX SINGLUAR OR NON-POSITIVE DEFINITE Causes: -In a static stress analysis, the model is not statically stable, because either a constraint or c...
nonpositive matrices definite communality communalities iterations ImpropersolutionsExploratoryFactorAnalysis(Twokinds)NonpositiveDefiniteMatricesDoyouhavemissingdata?OptionalSolutions:ConsidersomeadvancedformulaestimatingmissingdataEMalgorithm).MeansubstitutionoptionsSPSSprovides(OKsimplesolutionresearchsaysgoodapproach).Removepeo...