一类具有扩散种群的持续生存和渐近性

本利用上、下解和LyaPunov函数方法，讨论了一类具有扩散的种群模型的渐近性质，给出了具有重要生物学意义的结果．     

Maxwell-Stefan方程在多元相间传质方面的应用

多元物系传质过程与二元物系传质过程有着本质的区别，由于组分间的交互作用，多元物系传质各组分传质效率不相等，其分布范围可在-∞至 ∞之间，某些组分可能产生逆向传质、渗透传质、传质障碍等传质奇异现象，这些现象用传统的二元物系传质规律如Fick定律等无法做出解释，必须用Maxwell-Stefan方程进行描述。先概述了Maxwell—Stefan方程的由来、求解方法，然后具体介绍在多元相间传质中的应用。     

数据库技术引导推理过程的模式

】本系统以Ｐｒｏｓｐｅｃｔｏｒ不精确推理方法为基础，用关系数据库技术引导推理过程，达到了将控制策略数据化的目的。为专家系统的结构设计提供了一种可行的方案     

Study on the Splicing Principle of the Air Splicer for Auto-coner

The shaping form of an untwisted yarn-end for the airsplicer is analyzed and then a cosine curve formwhich will have practically good splicing effect isproposed. The yarn motion in the splicing nozzle by     

一类自催化反应扩散系统平衡态的稳定与分歧

目的研究一类自催化反应扩散系统平衡态的稳定性与分歧。方法根据线性化理论与弱的非线性理论，运用奇异摄动的方法进行研究。结果获得了该类反应模型平衡态局部稳定的充要条件与系统产生一致分歧解的必要条件。结论深化与丰富了稳定性理论。     

Dual gas-solid reactions with converse vector in ferrous metallurgy and its character

A concept of dual gas-solid reactions with the converse vector that simultaneously take place inside the pellet and between the gas and pellet has been put forward. Two parameters used for describing the character of dual gas-solid reactions are found out and verified by the reduction experiment of the pellet containing carbon in CO2 atmosphere. Of the parameters, critical rate of dual gas-solid reactions with converse vector is used to express minimum rate of gas-solid reaction inside the pellet, which is able to make reaction between gas and pellet halt. This rate can be measured and calculated. Diffusion coefficient of dual gas-solid reaction with converse vector disturbed by the gas expelled from inside the pellet can also be calculated by the critical rate and reaction rate of gas-solid inside the pellet.     

一类反应扩散方程组解的渐近收敛性

考虑一类反应扩散方程组的初边值问题。证明了该问题整体解的存在性和解的渐近收敛率。     

Gray Synthetic Evaluation on Moisture Comfort of Sportswear Fabrics under the Condition of Heavy Sweating

Moisture and water transfer under the condition of heavy sweating are analyzed. Four different experiments are made to test moisture resistance, water-keep, wicking effect and drying ability of samples. Then gray analysis method is introduced to evaluate the comprehensive comfort of these fabrics. Result shows chemical fiber with high moisture transfer performance has advantage in water transfer and diffusion, which is suitable for human under the condition of heavy sweating. Though natural fiber can absorb moisture well, it cannot transfer fluid sweat. Therefore natural fiber fabrics such as cotton, wool are unsuitable to make functional sportswear.     

人工沙丘水分运移机理的研究

采用中子仪、负压计和测温器同步监测沙丘水分、势能和温度场的变化．利用“零通量面”方法（ＺＦＰ）首次研究沙丘水分运移特征，并同时引用温度场的热渗透传导、热扩散的不可逆耗散理论解释沙丘水分运移机理．对利用沙丘水分、改造沙漠、治理灾害环境具有实际意义     

分数阶扩散方程的一种新的高阶数值方法

研究了分数阶扩散方程具有初边值问题的数值解法.基于Riemann-Liouville分散阶导数的定义,直接对该方程采取积分离散,利用四阶紧致有限差分算子对空间二阶导数近似,得到此方程的高阶隐式格式.证明了该格式是唯一可解的,并采用Fourier方法证明了该隐式格式是无条件稳定的.进一步,利用线性插值的方法提高了格式的误差阶,从所给的数值结果可以看出,改进后的格式的误差阶可达到O(γ2+h4).