无压气体动力学方程组二维Riemann问题的泛函解

本文考虑无压气体动力学方程组二维Ｒｉｅｍａｎｎ问题，构造了分片常初值时的Ｒｉｅｍａｎｎ解，非古典激波出现的某些解中，同时给出了Ｄｉｒａｃ激波的熵条件，包含Ｄｉｒａｃ激波的Ｒｉｅｍａｎｎ解不唯一。     

一个CAPP系统原型的设计和探讨

本文介绍了在充分研究减速器的工艺过程设计以及镗、铣、钻床和加工中心的加工特点的基础上，运用生成式的设计原理，使用面向对象的程序设计语言C 设计一个CAPP系统原型的实例．     

1－对甲苯磺酰基－3－吖丁啶基甲氧基甲基醚和1，5－二（对甲苯磺酰基）－3，7－二羟基－1，5－二氮杂环辛烷的合成和结构

对甲苯磺酰胺二钠盐分别与１，３－二卤化合物和环氧氯丙烷反应，得到两个新的氮杂环化合物，给出可能的反应机理，用红外、核磁、质谱及晶体衍射确定它们的结构。     

Al-Cu-Fe-Mg,Al-Cu-Fe-Zn和Al-Cu-Fe-Zn-Mg系准晶的形成规律研究

著者采用快速凝固方法制备了Al-Cu-Fe-Mg,Al-Cu-Fe-Zn和Al-Cu-Fe-Mg-Zn系合金粉末,这些快冷合金粉末在室温下为晶态相或晶态相与准晶相共存结构,把粉末加热到773～873K时,晶态相开始转变为准晶相,在1000～1073K时晶态相基本上完全转变为准晶相,继续提高加热温度,准晶相重新变为晶态相。本文对三种合金系列的加热相变规律,准晶相形成规律和准晶相的成分范围进行了详细的研究。     

An overview on distance and pseudo distance functions and their applications

The fast and accurate collision detection and distance calculation between geometric models is fundamental in robotics, manufacturing and computer-simulated environments. This paper surveys the state of the art in the theory and algorithms of distance and pseudo distance functions between convex sets. An overview on the existing results,including fast algorithms for distance calculation, definitions and properties of various pseudo distance functions (the J-function, the growth distance, and the pseudo minimum translational distance), is presented. The distance and pseudo distance functions are versatile in a wide range of areas.Their applications in robot motion planning, grasp analysis/synthesis, form error evaluation, and engineering optimization is demonstrated.     

粉末注射成形中幂律稳态问题的数值计算

对粉末注射成形中幂律流体的稳态问题构造了牛顿迭代公式，进行数值模拟，并利用FEPG3．0软件对绕流问题进行了数值计算，获得该问题的速度场．     

矩阵方程AHXA=B的自反解及其最佳逼近

通过广义奇异值分解定理,得到了矩阵方程AHXA=B的自反解存在的一个充要条件,并导出了这个矩阵方程的与已知矩阵最佳逼近的自反解.     

矩阵损失下多元随机回归系数和参数非齐次线性估计Minimax可容许特征

在矩阵损失下给出了多元随机回归系数和参数线性估计在非齐次线性估计类中是Minimax可容许估计的充要条件。     

4-酰代双吡唑啉酮BPMPDD与1,10-二氮杂菲对钪的协同萃取

本文研究了1,10-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)癸二酮-[1,10](BPMPDD简称 H_2A)与1,10-二氮杂菲(phen)从硝酸溶液中对钪的协同萃取行为(与盐酸介质作了相应的对比).用斜率法测定了协萃合物的组成为 ScA.HA.phen,求得了协萃平衡常数.用萃取法制得了固态萃合物,并对其溶解性、摩尔电导、热稳定性及 UV、IR、~1H NMR 谱进行了研究,讨论了协萃机理及萃合物的可能结构.     

Effect of D-allethrin on proteinase activity in the midgut of the spider Pardosa pseudoannulata detected by bulk acoustic wave impedance technique

The piezoelectric bulk acoustic wave (BAW) impedance analysis method was employed to monitor in situ the proteinase-catalyzed hydrolyzation of casein and the effect of pesticide D-allethrin on the proteinase activity in the midgut of the spider Pardosa pseudoannulata, and the results obtained were verified by ultraviolet spectroscopy. The hydrolyzation was significantly increased in the presence of low-dose D-allethrin, whereas significantly inhibited in the presence of high-dose D-allethrin, and a correlation was found precisely between the enzyme activity reflected by the final frequency shift after the hydrolyzation and the concentration of D-allethrin, with a significant frequency response observed even at a 1.5×10-5 volume ratio of D-allethrin to distilled water. The present work may have presented a novel method feasible for study on the mechanism of excitability of spiders under low-dose D-allethrin pesticide and quick detection of proteinase activity.