边界元法在带可动边界的瞬时热传导问题中的应用

该文利用边界无法对二维瞬时传热和相变问题进行求解。采用空间二次曲线单元对边界进行离散化,并采用时间相关基本解正确处理了相应边界积分。计算表明该文数值格式稳定,结果与已有文献相比较吻合一致,且该文模式时段可放大,从而提高了计算效能和稳定性。     

硅酸铋(BSO)晶体闪烁性能研究

报道对BSO晶体闪烁性能研究的若干结果. 包括晶体的激发光谱和荧光光谱、光产额、发光衰减时间和抗辐照能力等特性.     

关于算符ih（δ／δt）性质研究的若干评注

从时间平移的角度证明了算符ｉｈ（δ／δｔ）的厄米性，讨论了该算符的厄米性与态函数内积之间的关系，指出了Ｃａｐｒｉ在证明时间和能量对易关系不成立的过程中的错误，最后讨论了算符ｉｈ（δ／δｔ）和任一量子系统的Ｈａｍｉｌｔｏｎ算符之间的关系。     

紫外-可见光谱法研究细胞色素C活性中心金属离子与硫酸铜的相互作用

应用紫外－可见吸收光谱法研究细胞色素C（Fecyt-C)活性中心铁离在pH7.1的磷酸缓冲液中与无机CuSO4的直接相互作用。结果发现：CuSO4中的Cu（Ⅱ）与Fecyt-C中的Fe(Ⅱ）有交换作用，形成部分的Cucyt-C，并且随着外加CuSO4量的增加，这种相互作用增强，首次证实了细胞色素C这种直接相互作用的存在。     

多级适应性延误休假Mx/G(M/G)/1可修排队系统的可靠性指标

本文首次从系统可靠性的角度研究多级适应性延误休假Mx/G(M/G)/1可修排队系统,讨论了服务台如下的一些可靠性问题:(1)在时刻t失效的概率;(2)在服务员忙期内失效的次数;(3)在(0,t]内的平均失效次数;(4)在服务员忙期内的失效时间.     

核形变随Z,N的变化与核子间相互作用的电荷无关性

用双能级模型以及与电荷无关的核子-核子相互作用研究核形变随Z,N的变化,得到了与实验大体相符的结果.     

Large-time Behavior of Solutions to the Stokes Approximation Equations for Two Dimensional Compressible Flows

In this paper, we study the large time asymptotic behavior of solutions to both the Cauchy problem and the exterior problem of the Stokes approximation equations of two dimensional compressible flows.     

Chaos communication based on synchronization of discrete-time chaotic systems

A novel chaos communication method is proposed based on synchronization of discrete-time chaotic systems. This method uses a full-order state observer to achieve synchronization and secure communication between the transmitter and the receiver. Further, we present a multiple-access chaotic digital communication method by combining the observer with the on-line least square method. Simulation results are also given for illustration.     

Synthesis, Characterization, Spectroscopic Properties of 2-（4-Dimethylaminophenyl）-5-fluoro-6-（morpholin-4-yl）-1H-benzimidazole and its Interaction with Calf Thymus DNA

Benzimidazole compounds have attracted a renewed interest recently owing to theirpotential applications in high-performance composite materials, electronic chemicals,photosensitive materials, and their special potentials in biological and/or medicinalapplication1,2. Typically, aromatic compounds with near planar structures and contain-ing hydrogen-donor groups or groups, which are capable of being protonated, havespecial interactions with DNA via intercalation, hydrogen-bonding, and so on3.Me…     

中国科学家发现电荷-宇称-时间反演对称性破缺迹象

一个由中国科学院高能物理所和中国科学院国家天文台科研人员组成的研究小组，通过一种用宇宙微波背景辐射偏振检验CPT对称性的新方法。取得了重要成果：发现电荷-宇称-时间反演（CPT）对称性破缺迹象。