Organic chemistry of superoxide. I. Oxidations of aromatic compounds.

Potassium superoxide is a selective oxidant for aromatic compounds with the order of susceptibility of substituent groups being -SH>-NH₂-OH. Only o- and p- disubstituted amines and phenols are oxidized but monosubstituted thiols react.     

不协调目标信息系统知识约简的比较研究

研究不协调目标信息系统的各种知识约简之间的关系。证明分布约简既是β上分布约简，也是β下分布约简，并且在一定条件下,β上、下分布约简与不协调目标信息系统的分配约简和最大分布约简等价。     

Dynamical Model of QCD Vacuum and Color Thaw at Finite Temperatures

In terms of the Nambu-Jona-Lasinio (NJL) mechanism, the dynamical symmetry breaking of a simple localgauge model is investigated. An important relation between the vacuum expectation value of gauge fields and scalarfields is derived by solving the Euler equation for the gauge fields. Based on this relation the SU(3) gauge potential isgiven which can be used to explain the asymptotic freedom and confinement of quarks in a hadron. The confinementbehavior at finite temperatures is also investigated and it is shown that color confinement at zero temperature can bemelted away under high temperatures.     

磁场中简并四波混频的偏振旋转效应

本文讨论了磁场中简并四波混频的偏振旋转效应。计算了J_g=0→J_e=1跃迁的三阶非线性极化率X_yxx⁽³⁾。它包括两个部分:一部分是由于布居差的饱和效应产生的;另一部分是由于原子与光场的相互作用中,感生出来的塞曼相干所造成的。 关键词：     

Characterization of the spectrum of the Sturm-Liouville operator with irregular boundary conditions

We consider the spectral problem generated by the Sturm-Liouville equation with arbitrary complex-valued potential, q(x), ∈ L ₂(0, π) and irregular boundary conditions. We derive necessary and sufficient conditions for a set of complex numbers to be the spectrum of such an operator.     

烷基锌与亚胺不对称加成反应的研究进展

综述了烷基锌与亚胺不对称加成反应的最新进展。参考文献31篇。