多面体

The FORTRAN program to generate random convex polyhedron aggregate based on the topology of spherical aggregates and the codes of the meso-scale structured finite element grids of concrete are developed.

2为了实现骨料模型和其细观有限元网格的可视化，本文还研究了利用现有商业软件生成多面体随机骨料的可视化混合编程的方法。

The discriminance methods and expression of generalized alternative optimum solutions of linear programming is given by proving that the equivalent of optimum extreme point and extreme point of optimum solution sets of linear programming and applying the theorem of convex polyhedron.

通过证明线性规划最优解集的极点与线性规划最优极点的等价性，利用凸多面体的表达定理，给出了广泛意义下线性规划无穷多最优解的判别方法及表达式。

Then, through quadratic separators, the sufficient condition of the fault tolerant controller existence can be transformed into the problem of solving some limited number of linear matrix inequalities, including each vertex of the convex polyhedron.

然后，通过二次可分原理，求解只包含关于凸多面体各顶点的有限个线性矩阵不等式，给出了容错控制器存在的充分条件。

The algorithm for calculating natural neighbour co-ordinates and their derivatives based on Lasserre's algorithm for the volume of a convex polyhedron was derived and the generalized flowchart for NEM in 3D case was presented.

文中推导了基于 Lasserre凸多面体体积公式的三维自然邻结点坐标及其导数的算法，给出了三维自然单元法算法的流程图。

Necessary and sufficient conditions of the robust positively invariant sets are established for the linear discrete-time system family specified by matrix convex polyhedron and additive interval disturbances.

对由矩阵凸多面体和加性区间扰动描述的线性时变离散系统族，得到了鲁棒正不变集的充分必要条件；对非线性系统族则得到有关充分条件。

The three dimension parallel numerical computation of the wet-sieved concrete specimen was executed successfully to verify the program of random convex polyhedron aggregate.

4为了验证本文提出的多面体骨料生成方法，利用现有细观力学分析并行程序成功地实现了对湿筛混凝土试件三维细观并行数值计算。

Shortest path ; convex polyhedron ; computing geometry ; geodesics ; Voronoi graph.

最短路；凸多面体；计算几何；测地线； Voronoi图

Robust stability criteria, the design methods of robust stabilizing controller and guaranteeing certain robust performance controller for linear time-delay system with norm-bounded uncertainties or convex polyhedron uncertainties are studied in this paper by delay independent method and delay dependent method.

针对具有范数有界不确定参数和凸多面体不确定参数的线性不确定时滞系统，分别给出了它们时滞无关指定鲁棒H~∞性能约束可镇定的充分必要条件以及相应的控制器设计方法，结果以线性矩阵不等式的n浙江大学博士学位论文形式给出。

Probably, during the formation of spherical Au nanocrystals, PVP or PAM can be selectively adsorb on certain crystal planes of Au nanocrystals by the complexing effect between N or O with Au atom, thus leading to the different growth rates at different crystal planes of spherical Au nanocrystals and resulting in the formation of faceted Au nanocrystals and Au nanoplates.

研究表明，多面体和片状Au纳米晶是由球形Au纳米晶转变而来，这个转变是由于在球形Au纳米晶的形成过程中，PVP和PAM借助于其特有的N原子和O原子吸附到Au纳米晶的Au原子上，造成了晶体不同晶面生长速率的差异而导致的结果。

As a result, the special structure of spherical and polyhedron play a main role of extinction performance, and the vacuous structure enhances it by heat insulation and decalescence.

结果表明，水基泡沫的特殊球面体结构或多面体结构是造成光线强烈衰减的重要原因，其中空结构不仅增强了这种效应，而且起到了较好的隔热、吸热作用；水基泡沫体系中的表面活性剂、O 2、CO 2和H 2 O是主要的光线吸收物质；而添加剂是调节或增强水基泡沫吸光特性的重要环节。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。