Stochastic Games with Average Payoff Criterion

We study two-person stochastic games on a Polish state and compact action spaces and with average payoff criterion under a certain ergodicity condition. For the zero-sum game we establish the existence of a value and stationary optimal strategies for both players. For the nonzero-sum case the existence of Nash equilibrium in stationary strategies is established under certain separability conditions. Accepted 9 January 1997     

Some Considerations on Modeling Heat and Mass Transfer in Porous Media

In this paper some considerations are presented about the equations needed to set up a model of the process of heat and mass transfer in porous media. A clear classification is made of the various types of equations used and of their physical meaning. Special attention is paid to the thermodynamic equilibrium equations and to their derivation since they are too often taken for granted. The importance of the various transport mechanisms (of mass and energy) is analyzed and the consequences that can arise when some term is neglected are indicated.     

ON WELL-POSEDNESS OF THE MULTIOBJECTIVE GENERALIZED GAME

§1　IntroductionHadamard type well-posedness and Tikhonov type well-posedness are two main typesof concepts of well-posedness. At the beginning of last century,Hadamard firstintroduced the concept of well-posedness in study of optimal problem. Hadamard typewell-posedness of a problem means the continuous dependence of the solution on the dataof such problem. Later,Tikhonov introduced another concept of well-posedness.Tikhonov type well-posedness deals with the behavior ofa prescribed class …     

求全局最优解的新算法

利用局部极大值点与动力系统的稳定奇点的对应性，计算代数方程的根、无约束极大值点、有约束极大值点、非线性规划解、及最小二乘解．我们采用了常微分方程数值解的Euler算法及网格初始点的循序迭代算法，并以具体的例子和程序说明创立的方法具有通用性，同时考虑了一些存在的问题以便在理论和算法上作进一步的改进。     

金等离子体中Au48+—Au52+平衡分布的统计热力学研究

基于全相对论多组态Dirac-Fock理论，采用“多功能相对论原子结构程序(GRASP2)”，考虑量子电动力学(QED)效应和Breit修正，涉及实验谱中Au等离子体M带的几类重要跃迁，计算了Au48+—Au52+离子的能级结构和能级简并度.用统计热力学方法计算 各离子的配分函数，由配分函数计算等离子体内这五种离子的电离与复合平衡常数，根据同 时反应的平衡理论研究电离与复合达到平衡时等离子体内各离子的相对分布. 关键词： 金等离子体 配分函数 平衡常数 离子丰度     

聚苯硫醚合成宏观动力学探讨

聚苯硫醚(PPS)的合成是特殊的缩聚反应[1],在合成过程中存在快慢不同的两个反应,快反应是低分子缩合,慢反应是AB型自缩聚,因此可称为(A2B2)→AB型缩聚反应。本文探讨生产聚苯硫醚时温度等反应条件对反应程度和产物熔点的影响。1　实验合成实验的装置和产品的分析测试同前文[1]。所使用的两种溶剂(六甲基磷酰三胺和N 甲基吡咯烷酮)只能使阳离子溶剂化:Na2S+2xNMP2Na(NMP)+x+S2-(1)这一溶剂化作用的稳定常数较大,溶剂将钠离子包围起来,使硫离子充分裸露,具有更高的亲核性[2],这种高活性,促使它首先与对二氯苯进行反应,生成对氯硫…     

人工网络法计算累积稳定常数和化学形态

用前馈线性网络法的不同算法计算了水体系中Ｐｂ＾２＋与ＯＨ之间的累积稳定常数，并比较了各种算法的特点，根据计算得到的累积稳定常数，用反馈网络法计算了水溶液中Ｐｂ＾２＋和种化学形态的浓度，△ＥＰ随ＰＨ变化的模拟曲线，讨论了影响模拟结果的原因，结果表明，测量误差在４〈ＰＨ〈９时，ＣＯ３＾２对Ｐｂ＾２＋形态分布有明显的影响，在实验误差范围内，可以忽略的影响。     

尼龙1010球晶的熔融

本文利用偏光显微镜研究了尼龙1010等温结晶所生成的几类球晶的熔融现象,测得正环状球晶的熔点(T_m)为182℃,正放射球晶T_m=203℃;混合放射球晶T_m=202～205℃;暗负放射球晶T_m=204～210℃;亮负放射球晶T_m=205～210℃。利用Hoffman T_m-T_ε外推法测得其平衡熔点T_m~0=215℃。     

Equilibrium and dynamic surface properties of long-chain quaternary ammonium hydroxides with different chain length and number

The equilibrium and dynamic surface tensions of five long-chain alkyl ammonium hydroxides (AAH) at the air/aqueous solution interface were investigated, and the effects of the length and number of alkyl chain on surface tensions had been discussed. With the increase of the length, the equilibrium surface tension (EST) increased from 28.65 to 40.52?mN/m. While, for the double chains at the critical micelle concentration (CMC), the EST decreased from 32.71 to 26.61?mN/m with the length increasing. In addition, the adsorption behaviors of the AAH were analyzed and the effective diffusion coefficients (D_eff) were calculated on basis of the Ward–Tordai equation. Moreover, the time required to attain the EST decreases with the increase of surfactant concentration. The longer the C–H chain is, the lower surface tension at initial concentration is. What’s more, the diffusion processing of the AAH to air/water interface mainly depends on the surfactant concentration, and the adsorption is controlled by diffusion mechanism in a dilute concentration, while under a high concentration the adsorption is controlled by mixed diffusion–kinetic mechanism.     

用压强传感器展示压强对二氧化氮与四氧化二氮平衡体系的影响

利用自制木制固定器、注射器等设计实验装置,借助压强传感器展示压强对"2NO2?N2O4"平衡体系的影响,实验操作简单,直观地展现了平衡移动过程,对于学生学习化学平衡尤其是理解勒夏特列原理有很大的帮助。