Effect of Magnetic Field and Equilibrium Flow on Rayleigh-Taylor Instability

We investigate the effect of a finite equilibrium flow and magnetic field on the Rayleigh-Taylor instability. It is found that the equilibrium flow only makes a frequency shift of perturbation and the growth rate of the Rayleigh-Taylor instability remains unchanged. However, the magnetic field can change the growth rate and, in particular,a very strong magnetic field suppresses the growth rate.     

非平衡定态相图新概念及其应用——激活低压金刚石气相生长热力学

在激活的低压条件下，金刚石气相稳定生长的同时石墨会被腐蚀．这是近二三十年来国际上的一个热力学难题，甚至被认为是“热力学的悖论”．用非平衡热力学耦合理论可以给予很好的解释，并推导出非平衡定态相图的全新概念．在新型相图中金刚石在低压下是稳定相，而石墨被激活成为亚稳相．理论计算与文献报道的大量实验数据定量化地相符     

神出鬼没的信息武器

信息武器是信息技术催生的产物，主要包括网络武器（Network Weapons）、赛伯武器（Cyberweapon）和黑客武（Blacker Weapons）。信息武器的出现，是武器发展史上的一个转折点，把武器发展导入了一个全新的领域：作战目的追求和人员生命的保护平衡化。     

潜体在非均质流体中的平衡位置与平衡过程

以探空气球为例,讨论潜体在非均质流体中的平衡位置与平衡过程.     

Ab initio calculations of accurate dissociation energy and analytic potential energy function for the second excited state B1∏ of 7LiH

The reasonable dissociation limit of the second excited singlet state B¹∏ of ⁷LiH molecule is obtained. The accurate dissociation energy and equilibrium geometry of the B¹\Pi state are calculated using a symmetry-adapted-cluster configuration--interaction method in full active space. The whole potential energy curve for the B¹∏ state is obtained over the internuclear distance ranging from about 0.10nm to 0.54nm, and has a least-square fit to the analytic Murrell--Sorbie function form. The vertical excitation energy is calculated from the ground state to the B¹∏ state and compared with previous theoretical results. The equilibrium internuclear distance obtained by geometry optimization is found to be quite different from that obtained by single-point energy scanning under the same calculation condition. Based on the analytic potential energy function, the harmonic frequency value of the B¹∏ state is estimated. A comparison of the theoretical calculations of dissociation energies, equilibrium interatomic distances and the analytic potential energy function with those obtained by previous theoretical results clearly shows that the present work is more comprehensive and in better agreement with experiments than previous theories, thus it is an improvement on previous theories.     

降合物假冠醚研究（Ⅱ）新型聚合物的合成、吸附特性与绿色应用

合成了两种假冠醚型聚合物。研究了聚合物对金属离子的静态吸附性能。结果表明，聚合物对Ag^ ，Pb^2 ,Hg^2 表现出良好的吸附特性，且聚合物B的吸附能力优于聚合物A。吸附实验表明，除冠醚氧原子参与配位外，－CH2OH的氧原子亦参与了配位。聚合物B对Ag^ 的吸附过程中存在着明显的氧化还原现象，Ag^ 被还原为Ag^0，而聚合物分子中的－CH2OH被氧化成为－COOH。已初步将研究成果应用于本化学实验室的绿色化建设中。     

CO在钙钛矿型氧化物SmMeO3上吸附的红外光谱研究

对于CO在钙钛矿氧化物上的吸附,Tascon等人做了大量的工作.他们认为CO是吸附在表面O~(2-)上,O_2吸附在金属位上,且他们提出了氧化反应的可能机理为吸附态的CO与吸附态的氧生成CO_3为速度控制步骤,他们还认为该步骤是以生成稳定的双齿碳酸盐再变成单齿碳酸盐而进行的.即     

Effect of Bias Step on the I-V Curve in Double-Barrier AlGaAs/GaAs/AlGaAs Resonant-Tunnelling Devices

We investigate the non-equilibrium electron transport properties of double-barrier AlGaAs/GaAs/AlGaAs resonant- tunnelling devices in nonlinear bias using the time-dependent simulation technique. It is found that the bias step of the external bias voltage applied on the device has an important effect on the final current-voltage （I - V） curves. The results show that different bias step applied on the device can change the bistability, hysteresis and current plateau structure of the I - V curve. The current plateau occurs only in the case of small bias step. As the bias step increases, this plateau structure disappears.     

锥形模圆柱体超塑性挤压非局部摩擦分析

为了考虑金属材料表面微凸结构对模具与工件接触区域上的非局部摩擦效应,在锥形模圆柱体超塑性挤压加工分析中,采用Oden等提出的非局部摩擦定律代替经典的库仑摩擦定律,利用主应力法或工程法建立了相应问题的积微分形式的力平衡方程.在简化的情况下,采用摄动法求得所论问题的近似解,并分析了影响应力的非局部效应的相关因素.     

混合交通OD分布与随机平衡分配组合模型及算法

基于我国城市混合交通的特点,借助于Logit选择模型,建立了混合交通OD分布与随机平衡分配组合的数学规划模型,证明了模型最优解的等价性与唯一性,同时给出了算法和算例.