任意振幅单摆周期近似公式

文中提出一个精度较高的单摆周期近似公式，在任意振幅范围内，其计算结果可代替椭圆积分表．     

广东韶关“战国属楚”论质疑

传统史观认为韶关地区战国时期已属楚地，但从韶关地区考古文化所表现出来的特点及其与其相连的湘南地区同期考古文化的比较来看，当时韶关地区并不“属楚”。     

汉语双音节方位词语的产生

“之一、以一”类双音节方位后置词结构的产生时期较早，先秦时期已经有这种用法；“一面、一边、一头”和“之一、以一”类双音节方位名词的出现时期较晚，从魏晋南北朝以后逐渐产生。     

A paired queueing system arising in multimedia synchronization

One of the most important and distinguishing features of multimedia applications is the integration of multiple media streams that have to be presented in a synchronized fashion. In this paper, a queueing system with a special service mechanism arising in multimedia synchronization is considered. The system is characterized by arrival of two types of customers (media streams), and servicing of customers (processing of packets) in pairs with one customer from each type for a pair. The exact transient system size probabilities are obtained as the stationary solutions do not exist for this system and these are illustrated numerically. The density function of the first return to the origin for the queueing system is also obtained.     

A survey of retrial queues

We present a survey of the main results and methods of the theory of retrial queues, concentrating on Markovian single and multi-channel systems. For the single channel case we consider the main model as well as models with batch arrivals, multiclasses, customer impatience, double connection, control devices, two-way communication and buffer. The stochastic processes arising from these models are considered in the stationary as well as the nonstationary regime. For multi-channel queues we survey numerical investigations of stationary distributions, limit theorems for high and low retrial intensities and heavy and light traffic behaviour.     

两类带有确定潜伏期的SEIS传染病模型的分析

通过研究两类带有确定潜伏期的SEIS传染病模型,发现对种群的常数输入和指数输入会使疾病的传播过程产生本质的差异．对于带有常数输入的情形,找到了地方病平衡点存在及局部渐近稳定的阈值,证明了地方病平衡点存在时一定局部渐近稳定,并且疾病一致持续存在．对于带有指数输入的情形,发现地方病平衡点当潜伏期充分小时是局部渐近稳定的,当潜伏期充分大时是不稳定的．     

合理开发可再生资源的向量微分模型及其应用

本文首先建立了按年龄分组的可再生资源，各年龄组数量应满足的向量微分模型．然后利用所建模型成功地解决了ＣＭＣＭ９６Ａ题中的问题２．     

转型时期经济弱势群体的成因及对策探讨

经济体制改革和政治体制改革使我国进入一个复杂的社会转型时期，在这一过程中，出现了大量的社会弱势群体。分析了现行社会弱势群体产生的必然性以及原因，进而提出了当前扶助弱势群体应采取的主要对策。