一类孤立子系统的无穷守恒律及其精确解

通过一个谱问题得到了一类孤子族方程:包括广义TD(k=1),TD(k=1,α=0),广义C-KdV(k=0)与C-KdV(k=0,α=0)等,进而利用Riccati方程及相容条件得到了此类孤子方程的无穷多个守恒量及其连带流。并且针对特定的非线性发展方程,给出了其精确的孤子解及椭圆函数解。     

多元K-拟全纯函数及其正规定则

研究函数族的正规性定则是复变函数论中的一个重要且有意义的工作．引进多元K-拟全纯函数的定义，并给出了多元K-拟全纯函数族的一个正规定则．     

醇体系中合成CuGaS2纳米晶及其形貌演变

以CuCl2·2H2O,自制的GaCl3和(NH2)2CS为原料,在乙二醇体系中合成了花状结构的CuGaS2纳米晶．产物分别用X射线粉末衍射仪、透射电子显微镜、场发射扫描电子显微镜、高分辩透射电子显微镜和X射线光电子能谱仪进行了表征．实验结果表明,220℃反应24 h得到均匀的花状纳米结构CuGaS2,它是由厚度80-100 nm的片晶组成．同时,通过反应时间的控制,可以清楚的看到由纳米颗粒到纳米球以及花状纳米结构的演变过程．另外,研究了反应温度、反应时间、溶剂等对产物和形貌的影响．此外,对花状结构纳米晶的生长机理进行了初步的探讨．室温荧光光谱表明,随粒径的降低,发光位发生了部分蓝移．     

矩阵范数的界和方阵的ρ-条件数

本文给出了长方矩阵的p-范数及更广一类矩阵范数的上、下界又给出了方阵的p-条件数等于1的条件。(1≤p≤ ∞)。文[1]则是p=2的情况。前三节讨论p-条件数,第四节讨论长方矩阵范数的界。     

Ab initio calculations of accurate dissociation energy and analytic potential energy function for the second excited state B1∏ of 7LiH

The reasonable dissociation limit of the second excited singlet state B¹∏ of ⁷LiH molecule is obtained. The accurate dissociation energy and equilibrium geometry of the B¹\Pi state are calculated using a symmetry-adapted-cluster configuration--interaction method in full active space. The whole potential energy curve for the B¹∏ state is obtained over the internuclear distance ranging from about 0.10nm to 0.54nm, and has a least-square fit to the analytic Murrell--Sorbie function form. The vertical excitation energy is calculated from the ground state to the B¹∏ state and compared with previous theoretical results. The equilibrium internuclear distance obtained by geometry optimization is found to be quite different from that obtained by single-point energy scanning under the same calculation condition. Based on the analytic potential energy function, the harmonic frequency value of the B¹∏ state is estimated. A comparison of the theoretical calculations of dissociation energies, equilibrium interatomic distances and the analytic potential energy function with those obtained by previous theoretical results clearly shows that the present work is more comprehensive and in better agreement with experiments than previous theories, thus it is an improvement on previous theories.     

两种β兴奋剂对痉挛支气管的疗效对比

用舒喘宁控释剂(全特宁)与博利康尼进行对比,共治疗支气管哮喘和慢阻肺病患者38例,结果显示两者总有效率相似(P>0.05)。用全特宁或博利康尼后30分钟,8小时,10天后与用药前比较,FEV_(1.0)和PEF均有显著改善(P<0.01)。但用药后8小时,博利康尼对FEV_(1.0)和PEF的作用减退,全物宁仍有疗效(P<1.01),我们认为两种药物均有显著效果,但对夜间发作的支气管哮喘,应用博利康尼需增加用药的次数。控释剂型有其优越性。     

负载型双金属簇催化剂的多相一氧化碳加氢反应性能

负载型双金属簇催化剂的多相一氧化碳加氢反应性能索全伶，李晔（内蒙古工业大学化学工程系，呼和浩特０１００６２）殷元骐，金道森（中国科学院兰州化学物理研究所，兰州７３００００）关键词一氧化碳加氢，多相催化，双金属簇催化剂，钾效应。１．引言异核金属羰基簇作...     

乙酰丙酮稀土四苯基卟啉配合物的电化学研究

本文指出我国环境保护产业发展中存在的问题，论述了“入关“对我国环境保护产业的影响及应采取的经济和税收政策。