多面体

This article summarizes the advantages of direct optimized law in working out inequality constraints, and proposes the way to carry on the simulation with the regular polyhedron law to the standard unitary flood noose curve.

简述了直接优化法求解不等式约束问题的优越性，提出了用正多面体法对标准单式洪水绳套曲线进行模拟的思路及程序求解方法，分析了正多面体法模拟标准单式洪水绳套曲线的可行性，为进一步利用水位推求流量创造了条件。

The orientation and distortion of anionic coordination-polyhedra in piezoelectric and ferroelectric crystals are studied in this article.

本文研究了压电、铁电晶体中负离子配位多面体的结晶方位与形变，提出了压电晶体中同一种负离子配位多面体的结晶方位是一致的。

There exists isomorphous replacement in the rutile structure, and the most prominent feature is the average content of oxides, being 1.22%, 0.39%, 0.35% and 0.22% for V 2O 5, Fe 2O 3, ZnO and CuO respectively. They substitute Ti 4+ in octahedra. The valence of V is 5, and its polyhedron is trigonal bipyramid, which causes the lattice distortion, breaks the raw octahedron symmetry into square bipyramid, and produces the microstrains in the structure.

天然含钒金红石平均含V2O5可达1.22％，Fe2O30.39％，ZnO0.35％，CuO0.22％，这些金属离子可替代八面体中Ti^4 。V以5价形式存在，配位多面体呈三方双锥，其在晶格内部对Ti的替代导致晶格畸变，打破了配位多面体原有的八面体对称而呈四方双锥的几何形态，并产生结构微应力。

Polyhedral links are a class of topological links with polyhedral shape which are linked with a collection of finitely separate closed curves..

多面体链环是将古老的凸多面体结构和重要的纽结理论相结合，在解决近年来实验室中发现的病毒结构和合成的超分子结构的理论研究中，得到的理论成果。

The experimental evidence has shown that the polygonal Co particles are the final form. We found that Co formed nanocrystallites of 2-5 nm in diameter in the surface coating layer of the Mg_2SiO_4 crystalline stems and then aggregate into large clusters. These clusters further grow and recrystallize into polygonal single crystals. Instead of the single crystals, it is the polycrystalline clusters that played the most important role in Mg_2SiO_4 growth.c.

b。实验中观察到的现象表明多面体的Co颗粒并不是一开始就形成的，而是首先在Mg_2SiO_4的枝干表面以2-5nm的纳米晶体聚集成较大的团簇，这些团簇再继续生长并在最后重结晶为多面体的形状。

Finally,carried out the stopped search procedure in the polyhedrons on the slices.

该算法通过目标函数超平面截线性规划松弛问题的有效约束锥而形成一个单纯形；然后，引入一串平行片来切割该单纯形产生更低维的凸多面体；最后，在片上的这些凸多面体上执行阻止搜寻程序。

It is set forth that the symmetry of coordination anions in crystals is coincident with that of morphology if the boundaries of unit cell are divided with the faces,edges and angles of anionic coordination polyhedrons.

提出晶胞界线是以负离子配位多面体的面、棱和角为界面而划分的；晶体中负离子配位多面体的对称性与晶体形态的对称性是对应一致的。

Since the vertices of the simplex and the polyhedrons on the slices could directly be determined by the formulas, and the intervals of the variables in the polyhedrons on the slices were narrower, the algorithm was convenient and efficient.

由于单纯形和片上凸多面体的极顶点可以直接通过公式计算，且变量在片上凸多面体上的取值区间更窄，改进的定界阻止算法既方便又高效，这得到了一些经典算例和随机产生的算例的验证。

If such a plane is found, the intersection of the two convex polyhedra is not empty.

即有两个多面体的交点位于这一平面，若能找到一个相交平面则可以断定两个多面体

On the basis of theoretical result of convex polyhedra, the thesis includes two parts of research which aim at different problems.

多面体链环是由多个环相互嵌套成的具有多面体形状的一种拓扑几何结构。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。