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-...
importorg.apache.commons.math3.linear.NonPositiveDefiniteMatrixException;//导入依赖的package包/类@OverridepublicSlopeCoefficientsestimateCoefficients(finalDerivationEquation eq)throwsEstimationException{finaldouble[][] sourceTriangleMatrix = eq.getCovarianceLowerTriangularMatrix();// Copy matrix and enhanc...
However, lumped mass matrix which reduces the computation cost could not be used combined with the 20-node elements, because the mass matrix would be non-positive definite in the case. Applying the proposed algorithm, the generalized eigenvalue problem with non-positive definite mass matrix can ...
I’m analyzing a GMM with 4 timepoints without covariates. I have a negative variance of the intercept, that is not significant (I get the warning PSI Matrix is not positive definite). 1) How can this happen, what does this mean?
网络非负矩阵 网络释义 1. 非负矩阵 非负矩阵(nonnegative matrix)、正定矩阵(positive definite matrix)和正规矩阵A positive matrix is a real or integer matrix fo... cognitive-radio.diandian.com|基于18个网页 例句 释义: 全部,非负矩阵
1.When A is anonnegative definite matrixwith finite maximum eigenvalue, the strong convergence of random quadratic forms is established under finite fourth moment.当A为非负定矩阵且其最大特征根有限,随机变量存在有限的四阶矩情形下,获得了二次型的强收敛。
positive semi definite matrix 正半定矩阵 nonnegative integer 非负整数 nonnegative restriction 非负限制 nonnegative number 非负数 相似单词 nonnegative adj. [数]非负的,正的,零的 definite a. 1.清楚的; 明确的; 确切的 2.肯定; 有把握 matrix n. 1.【数学】矩阵 2.(人或社会成长发展的...
0.1085 0.0516 -0.0023 O2 ** NON POSITIVE DEFINITE ** 0.0822 0.0350 -0....
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...