群射

Consisting of the protracting graph of hydrogen-like atom"s angle distributing, computer simulation of the symmetry of molecular orbital and chemical reaction mechanism, showing the molecular point group and symmetry element, computer simulation of molecular vibration, Bravias"s crystal lattice and their transforming, extracting of plane periodic lattice, extracting of solid periodic lattice, close packing of isometrical pellet and the structure of simple mental substance, close packing of unequal pellet and crystal structure of representative ionic crystal, Computer Simulation of Phase Analysis by X-ray Diffraction.

内容包括类氢原子角度分布图的绘制，分子轨道对称性和反应机理的微机模拟，分子点群和对称元素显示，分子振动运动的微机模拟，布拉维晶格和晶格转化，平面点阵抽取，立体点阵抽取，等径网球的密堆积和金属单质结构，不等径圆球密堆积和典型离子晶体结构，X射线多晶衍射的微机模拟十个子模块。

The products consisted of yellow lead chromate phase and red chromate molybadate solid solution phase . The synthesis condition has a great influence on the ratio of the yellow phase and the red solid solution phase. The index for x-ray diffraction pattern of red so...

指标化结果表明：红色相钼铬酸铅固溶体属单斜晶系，空间群C_2/c，a；7.250(8A，b：12.444(7)A，c：5.119(5)人，夕=132.58(6)°，化学式PbCr_(0.88Mo_(0.12)O_4每个单胞由四个分子组成所得粉末衍射的数据可以代替JCPDS19—685号卡片，可以用定量PbCrO_4相含量的方法来表征颜料的质量。

A loop has the inverse property if it has both the left and right inverse properties.

一个合伦是使得中所有的三个映射都是双射的拟群同伦。

In this paper, the analytical expressions of seismic input for homogeneous elastic half-space are first derived in oblique incidence of plane SV-wave, and then a finite element model for a real hydropower cavern group composed of main powerhouse- transformer chamber- tailrace surge tank cavern is created. Characteristics of seismic responses such as displacement, acceleration and stress are studied in detail at different incidence angles and some results are compared with those given by the literature.

本文首先推导了平面SV波斜入射下均质弹性半无限空间的地震动输入表达式，然后建立了某水电站主厂房室-主变室-尾水调压室等构成的地下洞室群有限元模型，详细研究了不同入射角度下各洞室的位移、加速度、动应力等地震反应特点，并与文献进行了对比。

The conclusion was obtained which can be used in the employment of the aero-defence rocket launcher.

结果表明：火箭弹群组的合理构成和射序的中心对称能提高射击精度，发射箱质心位置变化历程的不同对起始扰动影响很大。

The so-called AT-algebras are inductive limits of finite direct sums of matrices over the extension algeras of circle algebra by K, where K is the C~*— algebra of all compact operators on a separable infinite dimensional Hilbert space.

若V_*与V_*同构，且保持单位元等价类；T与T仿射同胚，且同构映射与同胚映射相容，则存在E与E′的同构导出上述同构和同胚，所谓AT-代数即为圆代数通过κ的本质酉扩张的矩阵代数的有限直和的归纳极限，这里κ为可分的无限维复Hilbert空间上的紧算子全体，不变量中的V*为三变元Abel半群，T为迹态空间，[1]为单位元所在的Murray-von Neumann等价类，r_E为连接映射。

The crystal belongs to triclinic, space group P-1 with α=0.775 1(2) nm, b=0.837 7(2) nm, c=1.003 7(2) nm,α=75.57(3),β=83.05(3),γ=86.08(3), D=1.296 g/cm^3, Z=2, F(000)=256,μ=0.095 mm^(-1), and the final deviation factor R=0.0545 and wR=0.146 0. X-ray analysis reveals that molecules are linked by intermolecular O-H…O hydrogen bonds formed between the adjacent molecules.

具体测定结果如下：该晶体属于三料晶系，P-1空间群，α=0.7751 (2) nm， b=0.8377 (2) nm， c=1.0037 (2) nm，α=75.57 (3)，β=83.05 (3)，γ=86.08 (3)， D=1.296 g/立方公分，Z=2， F(000)=256，μ=0.095 mm^(-1)，最终偏差因子分别为R=0.0545，wR=0.1460.X-射线衍射分析表明，分子之间通过相邻分子间形成的O-H…O氢键相连。

Treatment of N-p-tolylsulfonylindole 1 with acetyl chloride in dried dichloromethane gave the title compound, N-p-tolylsulfonyl-3-acetyl-indole 2 C17H15NO3S, M(subscript r=313.36 in 89% yield. Single-crystal structure of 2 was determined by X-ray crystallography.2 crystallizes in the triclinic system, space group P-1 with a=10.0264(13), b=12.5913(16), c=14.1621(18)?

N-对－甲苯磺酰－吲哚(1)在二氯甲烷中与乙酰基氯反应得到产率为89%的N-对－甲苯磺酰－3-乙酰基－吲哚(2)（分子式：C17H15NO3S，分子量：313.36），用单晶X-射线衍射方法测定了2的晶体结构并表明：属三斜晶系，空间群为P-1，单胞参数为a=10.0264(13)，b=12.5913(16)，c=14.1621(18)？

The Xray diffraction analysis of the compounds (3) and (4) shows the presence of an intramolecular coordination of oxygen to the tin atom giving rise to a fivemembered ring in which the metal exhibits a distorted trigonal bipyramidal geometry.

并通过X-射线衍射测定了（3）和（4）的晶体结构，其空间群均为P2〓/c，晶胞内分子数Z=4，分子结构是以锡原子为中心金属原子、含分子内O→Sn配位键五员环的扭曲三角双锥结构，碳碳双键的两个氢是顺式构型。

It is a Hong Kong monopoly capital enterprise with 600 trained workers.experienced experts of lockmaking technology.development ability andm ould manufacture,forging,die-casting mechanical processing.polishing and galvanization.

深圳市浩群五金厂位于深圳市宝安区松岗镇，厂房占地面积10000多平方企业拥有素质良好的员工600多名，有着熟悉制锁工艺和实践经验的技术工、抛光、镭射和电镀生产能力的港资企业。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。