因素空间理论与知识表示的数学框架（X）——基于因素空间的神经元模型

本文是文［１—９］的继续，该文及后续论文仍将系统地研究因素空间理论及其在知识表示中的应用。该文研究基于因素空间的神经元模型：首先讨论了因素空间的神经元机理，然后讨论了几种典型的神经元模型；特别提出了基于Ｗｅｂｅｒ—Ｆｅｃｈｎｅｒ法则的神经元模型以及基于变权的神经元模型。     

主轴内蕴法与高维张量方程AX—XA=C^＊

本文将主轴内蕴法推广到高维空间，并讨论了高维张量方程ＡＸ—ＸＡ＝Ｃ的解．     

Commutative Poisson Subalgebras for Sklyanin Brackets and Deformations of Some Known Integrable Models

We construct hierarchies of commutative Poisson subalgebras for Sklyanin brackets. Each of the subalgebras is generated by a complete set of integrals in involution. Some new integrable systems and schemes for separation of variables for them are elaborated using various well-known representations of the brackets. The constructed models include deformations for the Goryachev–Chaplygin top, the Toda chain, and the Heisenberg model.     

Simple Coherent State and New Form for Inhomogeneous Differential Realization of OSP(2,1) Superalgebra

The simple coherent state of the OSP(2,1) superalgebra is constructed and its properties are discussed in detail. The matrix elements of the OSP(2,1) generators in the coherent state space are calculated. The new form for inhomogeneous differential realization of the OSP(2,1) superalgebra is given.     

Evaluating departures from fair representation

Computer–intensive estimates are introduced to evaluate departures from proportionality between the numbers of electors in a partition of a voting population and the numbers of representatives in the corresponding partition of the elected representation. At the first stage a pair of indices is proposed, one to evaluate the total strength of the departures and the other to indicate to what extent they are due to over–representation increasing (or decreasing) with the number of electors in a group. The properties of the indices are examined in suitably defined stochastic models which describe this type of over–representation. Since the values of the indices are strongly influenced by the distribution of electors in the given partition, a second stage of estimation is performed in order to get some [partition–free] information on the existence of a monotone size representation, and, if it exists, on its strength. The relevant transformation is based on intensive computer simulation in the introduced models. The methods proposed are applied to the results of the 1991 election of the Polish Scientific Research Council, which distributes funds among universities, scientific institutions and individual groups of researchers.     

BAYESIAN ANALYSIS, LIKELIHOOD RATIO AND INFORMATION

ＢＡＹＥＳＩＡＮＡＮＡＬＹＳＩＳ，ＬＩＫＥＬＩＨＯＯＤＲＡＴＩＯＡＮＤＩＮＦＯＲＭＡＴＩＯＮ￥ＺＨＡＮＧＹＡＯＴＩＮＧＡＮＤＤＵＪＩＮＧＳＯＮＧＡｂｓｔｒａｃｔ：Ｗｅｐｒｅｓｅｎｔａｎｅｗｓｃｈｅｍｅｆｏｒｕｎｃｅｒｔａｉｎｒｅａｓｏｎｉｎｇｂａｓｅ...     

图形显示中的几何变换

本文主要获得了以下结果：（ｉ）透视仿射映射的矩阵表示；（２）透视仿射变换的矩阵表示；（３）一般仿射映射的几何中实现及矩阵表示；（４）一般仿射变换的几何实现及矩阵表示。     

A matrix description of a wild category

A bocsA of representation wild type over an algebraically closed fieldk and its representation categoryR A are concretely described by using matrix method. It is proved thatA has almost split sequences and strong homogeneous property in the case chk=0. Thus there exists neither proper projective nor proper injective object inR A. And for each indecomposable object M inR A, there exists a proper almost split sequence, which is given explicitly. Project supported by the National Natural Science Foundation of China(Grant Nos. 19331013; 19671013).     

清华大学物理系原子核物理研究的新进展

在清华大学物理系成立80周年之际,对近年来清华大学物理系原子核物理研究的主要进展情况作一介绍,包括原子核高自旋态的实验研究,原子核结构的理论研究,高能核物理的理论研究.在高自旋态研究方面,内容包括在A～100丰中子核区核的集体振动转动带结构、新的准粒子带特性、新手征二重带等特性研究;在A～140丰中子核区核的八极形变及八级关联等特性研究;在A～130缺中子核区核的形状驱动效应,包括扁椭形变带、形状共存等特性研究.在原子核结构理论研究方面,内容包括用相互作用玻色子模型、推转壳模型、投影壳模型以及相对论平均场对原子核特性的研究;对原子核结构或其他量子系统的各种对称性和代数方法的研究,如动力学对称性、超对称性、势代数方法等;与对称性紧密联系的普通李代数和非线性李代数的表示,如普通李代数、李超代数、平方根型非线性李代数、多项式型非线性李代数等.在高能核物理研究方面,内容主要包括量子色动力学（QCD）在高温高密条件下的相变以及在相对论重离子碰撞中相变信号的研究.     

半平面中调和函数的积分表示

本文对于半平面中的调和函数u(z),证明了正部u (z)满足某些限制增长条件,用半平面边界上的积分表示,它的负部u-(z)也被类似的增长条件所控制.得到了半平面中负的调和函数的经典结果.