ρ∧—距离及随机场的失真率函数

本文将ρ∧-距离的概念推广到了随机场情形,证明了该推广定义的合理性,并导出了一些上界和下届估计,特别地,我们证明了有相变情况下2维Ising模型的两个极端测度μ ,μ＿间的ρ∧-距离大于1/3,我们着重研究了ρ∧-距离和失真率函数之间的关系,得到了一些重要性质,这些性质可以用来证明编码定理。     

均衡的再保险市场

本文讨论了再保险市场达到均衡状态的定义、性质以及与 Pareto最优的关系 .     

新型C60吡咯烷侧链聚硅氧烷毛细管气相色谱固定相

首次合成了C60吡咯烷侧链聚硅氧烷并用作毛细管气相色谱固定相.该固定相柱效高,使用温度范围宽(80～360℃),热稳定性良好,最高柱温达360℃,其基线漂移量为2×10-15A,呈弱极性,对各种醇、酮、芳胺、多环芳烃及邻苯二甲酸酯类有良好的分离选择性.     

高效液相色谱法测定红细胞内氨基酸含量

〕作者采用国产梯度洗脱装置,并改良了以往报道的色谱条件,对人体红细胞内23种游离氨基酸（包括谷胱甘肽）进行了分离和定量测定。各氨基酸保留时间的天内变异系数为0.17±0.09％,天间为0,21±0.12％（均数±SD,这说明国产仪器的性能可靠且重现性好。分析所得正常人红细胞内氨基酸值与文献报道基本一致。慢性肾功能衰竭和原发性肝癌患者红细胞内多种氨基酸有显著变化。实验证明,生理盐水洗涤红细胞会使红细胞内的各种氨基酸有不同程度的损失,在样品预处理过程中应予以注意。     

Uniform strength design of beams with non-zero minimum flexural rigidity under multiple loadings

The analytical method for uniform strength design (U.S.D.) of statically indeterminate beams is extended to deal with a preassigned constraint of non-zero minimum flexural rigidity and multiple load cases. And a numerical method of finding the U.S.D. is presented. Therefore we have a uniform procedure of solution of U.S.D. to beams with arbitrary cross-sectional shape and acted upon by several loadings and subjected to the constraint of minimum flexural rigidity.     

Numerical analysis of edge effect in laminated composite structures

In order to further study free edge effect in composite laminates, a new method is developed. This method is based on the perturbation and modified method of least square. In this paper, we emphatically discuss the solution within the boundary layer region, the socalled inner solution. As an example, we will discuss structures composed of two and four symmetric laminates. Project Supported by the Science Fund of the Chinese Academy of Science.     

S树兰烯( 烯)类似物的合成

本文报导了树兰烯(即钴钯烯)的几个类似物(6a-d和7a-d)的合成, 并讨论了有关这些化合物的形成反应的构象效应。     

An exact analytic method applied to nonhomogeneous ring- and stringer-stiffened cylindrical shells

In this paper, the nonlinear axial symmetric deformation problem of nonhomogeneous ring- and stringer-stiffened shells is first solved by the exact analytic method. An analytic expression of displacements and stress resultants is obtained and its convergence is proved. Displacements and stress resultants converge to exact solution uniformly. Finally, it is only necessary to solve a system of linear algebraic equations with two unknowns. Four numerical examples are given at the end of the paper which indicate that satisfactory results can be obtained by the exact analytic method.     

5-(2,3-二羟丙基)嘧啶的合成及其高碘酸盐氧化

近十年来,呋喃和嘧啶的并合体系之一的呋喃并[2,3-d]嘧啶的合成受到了一定的注意.对其衍生物的肌肉松弛、利尿、抗敏、镇静等作用及抗癌作用曾进行了研究.两个主要的合成途径是由取代4-羟基嘧啶与a-卤代羰基化合物缩合,或从2-氨基呋喃-3-甲腈或酮与胺或甲酰胺环化.