裂纹诊断的数学原理

本文得到了刚度矩阵Ｋ发生变化时，系统矩阵Ｓ的和持征值及特向量变化量计算的基向量表示，这一方法可简化特征值与特征向量变化量的计算，可节省计算时，并将此方法应用于转子裂纹诊断，而转子裂纹诊断是转子动力学的热门问题，对保证转子运行安全性具有重要实际意义。     

三丁胺胺化强碱性阴离子交换树脂催化苯乙腈的α-丁基化反应

以大孔型苯乙烯系三丁胺胺化强碱性阴离子交换树脂为催化剂，催化苯乙腈的α-丁基化反应，研究了反应温度，催化剂用量和反应时间等因素对反应产率的影响。并考察了催化剂的重复使用性能，结果表明：在优化条件下，该催化剂催化苯乙腈的α-丁基化反应产率高达88%以上，且催化剂具有良好的重复使用性能。     

一种新型亲水性胺基羧酸树脂的合成及其性能研究

以交联聚甲基丙烯酸缩水甘油酯为起始聚合物，经氨解和氯乙酸化反应，制得了一类骨架结构与聚甲基丙烯酸羟乙酯类似的亲水性胺基羰酸树脂，研究了这类树脂对Cu^2 的吸附性能，发现这类树脂对Cu^2 的吸附量可高达1.78mmol/g，且可以重复使用。     

AN SU（4）×S3a SCHEME OF THE STRATON MODEL

In this paper, we propose an SU（4）×S₃^a scheme of the Straton Model and discuss the classification of mesons. We suggest the possible existence of several colour excited states with masses around 2 GeV in companion with charm mesons. We also discuss the properties and the experimental behavior of these colour excited states, especially, the possible contribution of these states in several new phenomena.     

THE SYMMETRY OF STRATONS IN

In this paper,the color symmetry of stratons for a theoretical model proposed some times ago is investigated.This symmetry contains two kinds of transformations, the first is color gauge transformations which leave the color mumber of stratons conserved,the second is color permutations which indicate the equivaluence of dif- ferent color stratons.The structure of this symmetry group（S3α）is investigated.The irreducible representations（IR's）of S3α and the reduction of their direct product are given.The relation between IR's of S3α and those of color U（3）group is discussed. In a simplest physical model only two neutral vector gluons are needed and the super-strong ihteraetions among stratons exhibit saturation properties similar to but somewhat different from the case of the Han-Nambu model.Not only the color singlet, but also other color neutral states belonging to IR's 2 or 1 of S3α all belong to the lowest energy level of the super-strong interactions.If there were eight degenerate vector gluons belonging to IR's 2 and 6,the Han-Nambu model would be reproduced.     

合金元素对Nb3Sn生长动力学的影响

研究了合金元素Zr对Cu-Sn/Nb界面上Nb₃Sn生长动力学的影响。实验表明:在单芯复合材料中加入Zr显著提高了Nb₃Sn层的生长速率,层厚与时间的关系显著超过抛物线规律。这些结果不能仅用内氧化生成的ZrO₂颗粒使晶粒细化来解释,还必须考虑ZrO₂颗粒周围过饱和空位使扩散系数增大等因素。在多芯复合材料中热处理时Cu-Sn基体中Sn量的消耗,显著影响Nb₃Sn的生长。考虑了这一因素的Nb₃Sn生长动力学修正公式能对实验结果进行解释。 关键词：     

C-半群与C_0—半群的关系

在这篇文章中证明了C-半群在限制空间中为C_0-半群,首次讨论了C-半群的解析性