I-Fuzzy拓扑空间中的可数性

引入I-fuzzy拓扑空间中的I—fuzzy第一可数性,I—fuzzy第二可数性,I—fuzzy稠密性,I—fuzzy可分性,I-fuzzyLindelbf性等概念。界定了它们的本质性质,并讨论了它们之间的关系,还给出了第一可数I-fuzzy拓扑空间中的映射连续性的序列刻画。     

从碳到氮——以“金课”标准在碳基材料转化设计中提升学生创新思维培养

Carbon has always been an essential content in the teaching of inorganic chemistry. In light of the gold standard proposed by the Ministry of Education for the 'Gold Classes', through teaching of the transformation design of carbon-based materials, the paper gradually introduces the novel photocatalyst graphite carbon nitride from graphite and graphene, and analyzes its properties. This approach can improve students' understanding of graphite and nitrogen carbide, and play a role in cultivating students' innovative thinking.     

阻燃尼龙1010的研究

本文系统的研究了尼龙1010阻燃体系。确定了阻燃尼龙1010最佳配方。采用复合阻燃剂体系，在保证尼龙1010具有良好的阻燃性能前提下，可大大减少阻燃剂的加入量，从而减少由于阻燃剂的加入而引起的原尼龙1010树脂抗张强度的降低。     

一般KdV方程的群分析

对于一般KdV方程(0,1)给出统一的相似约化,利用所得的三参数Lie点变换群,从已知解产生新的单参数解族,对于非可积情形(n=2,4,σ=-1)给出一系列的精确解或解的渐近态。     

The probability of triviality

Given a variety of algebras, what is the probability that for an arbitrary identity p q the only algebra in that satisfies p q is the trivial algebra? More generally, if is a subvariety of what is the probability that p q together with the identities of forms an equational basis for ? We consider these questions for various and and we provide criteria that allow for explicit determination of these probabilities. Received April 14, 1997; accepted in final form January 19, 1998.     

关于Orlicz空间的H性质的注记

该文给出了Orlicz函数空间具有H性质的充分必要条件．     

ON THE STRUCTURES OF RANDOM MEASURE AND POINT PROCESS CONVOLUTION SEMIGROUPS

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辐射交联含乙烯基聚甲基硅氧烷与聚乙烯的合金膜

研究了含乙烯基聚二甲基硅氧烷与高压聚乙烯的合金膜(简称PDMVSPEM)的制膜、辐射剂量和材料配比等对PDMVSPVSPEM的氧氮透过选择性、力学性能和表面特性的影响,初步讨论了结构与性能的关系。只要满足温度条件,易用机械共混获得组份分布均匀的合金膜。膜的辐照效应与剂量的关系表现为剂量<0.04兆戈瑞时,产生交联;>O.04～0.08兆戈瑞,交联与裂构同时均匀进行;>0.08兆戈瑞,裂构占主导。在上述辐照剂量范围内,PDMVSPEM的P_(O_2)和α_((O_2)/N_2)未见改变;随PE含量增加,膜的P_(O_2)。呈非对称S形变化,拉伸模量E较拉伸强度δ增长快,断裂伸长ε沿U字形变化。谷底在PE含量40～50％,此刻形态结构处于相逆转阶段,并对应于膜凝胶生成量的低点。PDMVSPEM的相区尺寸很小,仅当PE含量>70％时,SEM图中方可现察到较明显的相分离结构,在PDMVSPEM的最表面层(约 5nm)产生有机硅链段的富集。即使PE含量高达90％,膜的表面特征仍与纯聚甲基硅胶的颇为相近。     

A group theoretic criterion for property FA

We give group-theoretic conditions on a set of generators of a group which imply that admits no non-trivial action on a tree. The criterion applies to several interesting classes of groups, including automorphism groups of most free groups and mapping class groups of most surfaces.

     

Automatic log P estimation based on combined additive modeling methods

Summary A program for the automatic estimation of the logarithm of the partition coefficient between 1-octanol and water phases (log P) has been developed as a component of a system entitled CHEMICALC (Combined Handling of Estimation Methods Intended for Completely Automated Log P Calculation). Log P values are calculated based on additive group contributions to log P. Three sets of groups are defined, and their contributions have been derived from the experimental log P values of 1465 molecules. The system divides a structural formula of a compound of interest into the groups whose increments are provided and then calculates its log P value. All processing after structure input is fully automated. This system has been tested for predicting the log P values of 1686 compounds. The accuracy is sufficient for many practical purposes.