反对称的

Three chiral phosphorus ligands were prepared using anisole as the startingat material.Their applications in the asymmetric hydroformylation and asymmetric conjug ed addition of diethylzinc to enones were investigated.

以苯甲醚为原料，合成了三种新的手性含磷配体，考察了三种配体在不对称氢甲酰化反应和ZnEt2对环己烯酮的不对称共轭加成反应中的应用。

Chapter 3 introduces some methods seeking exact solutions for the nonlinear evolution equation, such as inverse scattering method, symmetry reduction method, Backlund transformation, Darboux transformation , Hirota bilinear method, Painleve analysis method, AC = BD model, and so on.

第三章简要介绍了非线性发展方程的若干求解方法，如反散射方法，对称与微分方程约化，Backlund变换和Darboux变换方法，Hirota双线性方法，Painleve奇性分析法，AC=BD框架下的精确求解等。

Among the large number of nonlinear absorbers, the material applied most extensively is phthalocyanine reverse saturable absorption compound which is organic large molecule with central symmetry two-dimensional π-electron conjugate system. In the off-resonance condition, its absorption coefficient will raise along with the increasing of incoming light intensity, which shows its reverse saturable absorption properties.

在非线性光学材料中目前最具应用价值的是酞菁类的反饱和吸收材料，这是一类具有中心对称二维π电子共轭体系的有机大分子，在非共振激发条件下，吸收系数往往会随入射光强的增加而增加，体现反饱和吸收。

D-wave superconductor ; The broken time reversal symmetry pairing state ; Rough interface scattering ; Differential conductance.

d波超导；时间反演对称态的破缺；粗糙界面散射；微分电导

Necessary and sufficient conditions for the existence and the expressions of selfconjugate solution, perselfconjugate solution, centrosymmetric solution, bisymmetric solution, skewselfconjugate solution, skewperselfconjugate solution, skewcentrosymmetric solution, and skewbisymmetric solution to 4 kinds of systems of linear matrix equations over a regular ring with an involutorial antiautomorphism are given.

利用矩阵技巧和所建立的矩阵理论，给出了正则环上五类矩阵方程组有解的若干充要条件和一般解的表达公式。这些矩阵方程组除了它们在理论上有重要的意义外，还有重要的应用价值。在具有对合反自同构的正则环上，给出了四类矩阵方程组有双对称解，中心对称解，斜中心对称解，广自共轭解，斜广自共轭解，自共轭解以及斜自共轭解的充要条件及其这些解的具体表达式。

The pyran rings were formed in an I_2-induced heterocyclization of hydroxyl and olefin.

分别以14步反应和16步反应为-Benzylpedamide提供两条不同的不对称全合成途径。

The symmetry of the antiferroelectric phase of PbZrO3 was reinvestigated by the symmetry element analysis based on the projective figures given in the related literatures.

在参考文献给出的锆酸铅的反铁电相投影图的基础上，从生群元的角度重新研究了反铁电体锆酸铅的反铁电相的对称性，发现锆酸铅反铁电相的对称群应是P2/m，属于单斜晶系。

The transformation between I3F,C3F,t3F and YF of three generation quarks and leptons of Fermi type follows the hypercharge-spinor transformation,and so does that between I′3B,C′3B,t′3B and Y′B of their three generation supersymmetry companion s,antiquarks and antileptons of Bose type.

三代费米型夸克、轻子的I3F，C3F，t3F，YF间及它们的超对称伴子三代玻色型反夸克、反轻子的I′3B，C′3B，t′3B，Y′B间均满足超荷-旋量变换。

Based on the hypothesis of Cole-Cole model, a new recursive inversion method is used in the inversion of complex-resistivity sounding curves over multi-layered earth with Schlumberger array without electromagnetic couping.

在Cole Cole模型假设的基础上，用一种新的递推反演算法对无电磁偶合影响时的水平层状大地对称四极装置复电阻率测深曲线进行反演，得出了层状大地上视电阻率、视时间常数、视频率相关系数、视充电率的视真频参数测深曲线。

Based on Bresenham's algorithm,the thesis gives a fast technique for drawing anti-aliased straight line according to the symmetry of the straight line, dissertates the arithmetic of antialiasing the compass small character and offers the program of the compass picture.

本文基于Bresenham算法，依据直线的对称生成原理，提出了一种新的直线快速反走样技术，对罗盘字符的反走样算法做了进一步的论述，编制了全罗盘画面的程序。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。