旱地扁豆新品系ILL6980为青海省农林科学院1992年从国际干旱中心引进,同年引入甘肃省定西市旱作农业科研推广中心。1997—1999年在甘肃省定西市区试中,3 a 18点(次)平均折合产量1 447.5 kg/hm2,较对照品种本地小扁豆增产98.9%,居6个参...旱地扁豆新品系ILL6980为青海省农林科学院1992年从国际干旱中心引进,同年引入甘肃省定西市旱作农业科研推广中心。1997—1999年在甘肃省定西市区试中,3 a 18点(次)平均折合产量1 447.5 kg/hm2,较对照品种本地小扁豆增产98.9%,居6个参试品种(系)第1位。该品系综合农艺性状优异,丰产稳产,耐(抗)根腐病,抗旱性强,适宜在定西市干旱地区及同类地区推广种植。展开更多
A novel method based on ant colony optimization （ACO）, algorithm for solving the ill-conditioned linear systems of equations is proposed. ACO is a parallelized bionic optimization algorithm which is inspired from th...A novel method based on ant colony optimization （ACO）, algorithm for solving the ill-conditioned linear systems of equations is proposed. ACO is a parallelized bionic optimization algorithm which is inspired from the behavior of real ants. ACO algorithm is first introduced, a kind of positive feedback mechanism is adopted in ACO. Then, the solu- tion problem of linear systems of equations was reformulated as an unconstrained optimization problem for solution by an ACID algorithm. Finally, the ACID with other traditional methods is applied to solve a kind of multi-dimensional Hilbert ill-conditioned linear equations. The numerical results demonstrate that ACO is effective, robust and recommendable in solving ill-conditioned linear systems of equations.展开更多
This paper discusses the regularization solution of ill posed equation with the help of its spectral decomposition formula. It shows that regularization can filter the influence of the high frequency errors which are ...This paper discusses the regularization solution of ill posed equation with the help of its spectral decomposition formula. It shows that regularization can filter the influence of the high frequency errors which are very sensitive to the parameters to be estimated, and gives a complete derivation of the spectral decomposition formulae of least squares adjustment, rank deficient adjustment and the regularization solution of ill posed equation. It also shows the equivalence between the trace of the mean squares error and the expectation of the secondnorm of estimated parameter’s total error.展开更多
文摘旱地扁豆新品系ILL6980为青海省农林科学院1992年从国际干旱中心引进,同年引入甘肃省定西市旱作农业科研推广中心。1997—1999年在甘肃省定西市区试中,3 a 18点(次)平均折合产量1 447.5 kg/hm2,较对照品种本地小扁豆增产98.9%,居6个参试品种(系)第1位。该品系综合农艺性状优异,丰产稳产,耐(抗)根腐病,抗旱性强,适宜在定西市干旱地区及同类地区推广种植。
文摘A novel method based on ant colony optimization （ACO）, algorithm for solving the ill-conditioned linear systems of equations is proposed. ACO is a parallelized bionic optimization algorithm which is inspired from the behavior of real ants. ACO algorithm is first introduced, a kind of positive feedback mechanism is adopted in ACO. Then, the solu- tion problem of linear systems of equations was reformulated as an unconstrained optimization problem for solution by an ACID algorithm. Finally, the ACID with other traditional methods is applied to solve a kind of multi-dimensional Hilbert ill-conditioned linear equations. The numerical results demonstrate that ACO is effective, robust and recommendable in solving ill-conditioned linear systems of equations.
文摘This paper discusses the regularization solution of ill posed equation with the help of its spectral decomposition formula. It shows that regularization can filter the influence of the high frequency errors which are very sensitive to the parameters to be estimated, and gives a complete derivation of the spectral decomposition formulae of least squares adjustment, rank deficient adjustment and the regularization solution of ill posed equation. It also shows the equivalence between the trace of the mean squares error and the expectation of the secondnorm of estimated parameter’s total error.
