Nonclassical Properties of Orthonormalized Eigenstates of the Operator (a q f(N q )) k

In this paper, the completeness of the k orthonormalized eigenstates of the operator (a _q f(N _q )) ^k (k 3) is proved. We introduce a new kind of higher order squeezing and an antibunching. The properties of the Mth-order squeezing and the antibunching effect of the k states are investigated. The result shows that these states may form a complete Hilbert space, and the Mth order [M = (m + 1/2)k;m = 0,1,2,. . .] squeezing effects exist in all of the k states when k is even. There is the antibunching effect in all of the states.     

Synthesis,crystal structure and properties of a one-dimensional polymeric copper(II) complex of tetrachlorophthalate

The coordination polymer [Cu₂L₂(H₂O)₆ · 2(H₂O)] _n (L = -tetrachlorophthalate dianion) has been synthesized and characterized by X-ray crystallography, i.r. spectroscopy, electronic spectroscopy and cyclic voltammetry. The structure of the complex is a one-dimensional zigzag chain. The i.r. spectra reveal that the tetrachlorophthalate groups are bismonodentate ligands, and this is confirmed by the crystal structure determination. Cyclic voltammetry reveals two steps of a quasi-reversible oxidation–reduction processes for the complex.     

A linear comprehensive adsorption model of hydrogen on super activated carbon under supercritical conditions

The adsorption isotherms of hydrogen on super activated carbon were measured systematically, covering a temperature range of 93-293 K at 20 K intervals and pressures up to 7 MPa. All the experimental data were linearized by adopting the coordinates ln ln(n) vs 1/(ln P). The results indicate that the adsorption limit (P(lim), n(lim)) exists virtually at high pressure and has a certain physical meaning. Based on the adsorption limit, further analyses were carried out by modeling the adsorption isotherms in the coordinates ln(n(lim)/n) vs ln(RT(ln(P(lim)/P) and a linear comprehensive adsorption model was proposed in the form n (lim)=n.exp(psi T+lambda/T-c/) (beta).[RT ln( P (lim)P )] (b) which can predict the adsorption isotherm of hydrogen on activated carbon in supercritical conditions.     

LiNi1-xAlxO2(x=0～1.0)固溶体结构的XRD研究

利用溶胶凝胶法制备了新型锂离子二次电池正极材料LiNi_1-xAl_xO₂(x=0,0.1～1.0)固溶体,X射线衍射结果表明,在0≤x≤1范围内,材料均为具有α-NaFeO₂型结构的LiNi_1-xAl_xO₂固溶体单相.随着Al固溶量的增加,晶胞参数发生变化,a轴缩短,c/a比增大,晶胞体积V₀减小,材料的层状属性更加明显.     

Long Excursions of a Random Walk

In Csáki et al. ⁽¹⁾ and Révész and Willekens⁽⁹⁾ it was proved that the length of the longest excursion among the first n excursions of a plane random walk is nearly equal to the total sum of the lenghts of these excursions. In this paper several results are proved in the same spirit, for plane random walks and for random walks in higher dimensions.     

线性空间中向量极值问题的最优性条件

文 [1]建立了线性拓扑空间中向量极值问题的广义 Kuhn- Tucker条件和 L agrange乘子存在定理 .本文将在线性空间中讨论这方面问题 ,首先在线性空间中建立了次似凸向量值映射的择一定理 ,进而得出序线性空间中向量极值问题的最优性条件及其标量化定理 .     

Mass transport characteristics and chromatographic behavior of preparative electrochromatography on hydroxyapatite.

Introducing an electric field into chromatography on hydroxyapatite (HAP) was attempted in order to enhance mass transfer and separation performance. A membrane spaced multicompartment electrolyzer was developed for electrochromatography on HAP. The high performance of liquid transport by electroosmotic flux was identified and described in terms of dynamic electroosmotic pressure. The application of the electric field resulted in an improved adsorption of bovine serum albumin as shown by the breakthrough curve as function of the electric field. An improved elution was also obtained in the presence of the electric field. The results show that electroosmosis is a powerful tool of liquid transport and dispersion in a packed bed of fine particles and has potential in the large-scale chromatography of biological molecules.     

气体分离膜研究进展

全面综述了近几年气体分离膜研究的最新进展,主要包括气体分离膜材料、制膜方法、表征方法三个方面。     

高功率准连续激光二极管抽运的Q开关内腔倍频固体激光器的研究

对高功率准连续激光二极管抽运的Q开关内腔倍频Nd:YAG和Nd:YVO4激光器进行了实验研究,分别获得了输出功率为3．5W和3．2W,输出波长为532nm的激光脉冲,其重复率达22kHz。     

基于模糊综合评判方法的DEA模型

利用数据包络分析和多目标规划的有关理论,对模糊综合评判方法进行进一步探讨,给出一个建立在模糊综合评判过程基础上的DEA模型,该方法不仅能够增强模糊综合评判结果的客观性,更重要的是它可以找出模糊综合评判中较差单元无效的原因,并能为较差单元的改进提供许多有用的信息。