线性σ-模型和在J/ψ→γpp的pp质量谱中观测到的增强现象

假定BES合作组在辐射衰变J/ψ→γ pp中观测到的pp,谱的增强是由于存在一个pp的分子态,用线性σ-模型计算了它的束缚能和寿命. 具体考虑了这种增强现象是由于pp可能形成一个S-波或P-波共振态, 并把计算结果和实验数据做了比较. 与氘核不同, 由于pp可以通过s-道湮没, 因此通过研究它的总宽度可以获得线性σ-模型及其相关问题的信息.     

古青铜器的ICP光谱分析

本文利用ICP光谱法测定了11个古青铜器中的主要元素Cu、Sn、Pb和微量元素As、Ni、Fe、Ag的含量，结果完全满足考古研究的要求，为考古研究提供了科学的依据。     

胶球研究现状

本文介绍了有关胶球研究的现状,重点介绍确认胶球的一些定性的判据以及实验上已发现的一些可能的胶球候选者.     

闭曲面上C0流有伪轨跟踪性质的条件

给出了闭曲面上奇点孤立的C⁰流有伪轨跟踪性质的充分必要条件     

高温QCD的耦合常数和退禁闭相变

用有限温度场论中重整化群方法,研究了QCD的有效耦合常数的温度依赖性,发现高温时耦合常数在全动量区都很小,体现出了QCD的退禁闭特征.     

ONOO-活性氧的荧光光谱分析进展

系统介绍了ONOO^-活性氧的化学性质，并对其参与的主要化学反应进行了分类和总结．同时，比较了近年来用于ONOO^-检测的方法，并重点论述了荧光光谱分析方法尤其是酶催化动力学荧光分析法在检测ONOO^-活性氧方面的优势和最新的研究进展．     

Effects of Processing Parameters on Microstructure and Properties of Nanoscale ZrC/ZrB2 Multilayered Coatings

ZrC/ZrB2 multilayered coatings with bilayer periods of 3.5-40nm are synthesized by rf magnetron sputtering. Analyses of x-ray diffraction, scanning electron microscopy and nanoindentation indicate that multilayered coatings possess much higher hardness and greater fracture resistance than monolithic ZrC and ZrB2 coatings. A maximum hardness （41.TCPa） and a critical fracture load （73.7mN） are observed in the multilayer with A = 32 nm deposited at the substrate bias -40 V. Higher residual stress built in the ZrC layer can be released by periodic insertion of ZrB2 into the ZrC layer. A clear multilayered structure with mixed ZrB2（001）, ZrB2 （002） and ZrC （111） orientations should be responsible for the enhanced mechanical properties.     

Pregelation Behaviour of Coagulation Processes with the Constant-Reaction-Number Kernel

We propose an irreversible binary coagulation model with a constant-reaction-number kernel, in which, among all the possible binary coagulation reactions, only p reactions are permitted to take place at every time. By means of the generalized rate equation we investigate the kinetic behaviour of the system with the reaction rate kernel K（i;j） = （ij）^w （0 ≤w〈1/2）, at which an i-mer and a j-mer coagulate together to form a large one. It is found that for such a system there always exists a gelation transition at a finte time to, which is in contrast to the ordinary binary coagulation with the same rate kernel. Moreover, the pre-gelation behaviour of the cluster size distribution near the gelation point falls in a scaling regime and the typical cluster size grows as （to - t）-1/（1-2w）. On the other hand, our model can also provide some predictions for the evolution of the cluster distribution in multicomponent complex networks.     

激发媒质中的非线性波动力学

本文报道了激发媒质中非线性动力学的最新进展,特别以心室纤维性颤动、化学涡波和大脑皮层扩布性阻抑作为例子。对于进一步的研究和应用也作了讨论。