高温高压金刚石单晶生长界面的研究

 利用扫描电镜及Auger电子谱技术研究了高温高压下金刚石单晶生长界面的特性，观察到了金刚石单晶表面及金属膜表面的沟槽结构及金刚石-金属、金属-石墨两个主界面间的过渡层结构及界面间C原子电子组态的变化。     

辐射驱动内爆温度源脉冲整形研究

辐射驱动温度源脉冲整形是获得高压缩比的重要途径。本文从脉冲整形的基本原理出发，采用数值模拟方法，给出适合于神光Ⅲ装置内爆实验的辐射驱动温度源脉冲整形曲线。     

凸泛函型的区域压缩与拉伸不动点定理

利用赋范线性空间中的收缩核,给出了凸泛函型的区域压缩与拉伸不动点定理,推广了郭大钧定理.     

Long-term prediction of compressive creep development in expanded polystyrene

The results obtained in investigating the creep of expanded polystyrene (EPS) boards under compressive stress are presented. Power and exponential equations were used for describing creep compliance. It was found that the curves of creep compliance approximated by both equations adequately represent the research results, taking into account the scatter of the experimental data. Based on the calculation and empirical estimate of long-term creep of EPS under compressive stress σ_c=(0.25–0.45)σ_10%, its creep compliance was determined for a period of 10 years in the future. The dependence of on the density of polystyrene boards and the value of long-term compressive stress σ_c was established. The expected values of creep strain development in expanded polystyrene boards EPS 80–EPS 250 under constant compressive stress σ_c=(0.25–0.45)σ_10% are presented for the prediction period of 10 years. To obtain the expected creep values for any other period of time in the interval of 5T50 years, the values of should be multiplied by the empirical coefficient .     

A Compact and Transmissive Device for Dispersion-Compensation of Ultra-short Optical Pulses

We show by computer simulation that a coupled-cavity-type multilayered structure is suitable for the transmissive compensation of group-velocity dispersion for optical pulses of subpicosecond length, and can thus be used to make a simple, compact, and transmissive dispersion-compensation device.     

Compressive energy of ions in ionic crystals

The possibility of writing the repulsive energy in the Born model of binary ionic crystals as a sum of two separate contributions from the two ions has been investigated. Such an approach leads to two identities, one connecting the lattice spacings of a family of ionic crystals and the other connecting their compressibilities. These identities have been tested on the alkali halide crystals over a range of pressures. The agreement is found to be quite satisfactory. Some further predictions with respect to crystals which exist as two polymorphs have also been tested. In all cases, the deviations of the experimental values from the exact identities can be traced to the fact that second neighbour repulsions in the crystals have been neglected. It is hence concluded that individual compressive energies for ions in ionic crystals is a very attractive possibility.     

On Some Nonclassical Problems of Fracture Mechanics Taking into Account the Stresses Along Cracks

The paper reports on the results from analysis of some nonclassical fracture problems that allow for stresses along cracks. The results have been obtained by the author and his collaborators at the Institute of Mechanics (Kiev) since 1980     

用于预测疏松材料冲击压缩特性的热力学模型

 在一定的假设条件下，从基本的热力学关系出发，导出了一个新的物态方程表达式。利用这一新形式特态方程所建立的热力学模型，可预测疏松材料的冲击压缩行为。以低、中、高冲击阻抗的铝、铜和钨为示例，将本模型的理论计算曲线与实验冲击压缩数据比较，表明本模型的在宽广的压力范围内具有良好的普活性；对不同初妈密度，疏松材料的冲击压缩行为均显示出较为满意的理论经历测能力；与现有的其它疏松材料物态方程模型相比，本模型在理论上和实际应用中均具有较大的优越性。     

基于半导体光放大器和非线性光纤环镜的光脉冲压缩器的设计模型和理论分析

提出了一个基于半导体光放大器和级联的非线性光纤环镜（NOLM）相结合的光脉冲压缩器的设计模型.数值研究结果表明：通过合理选取NOLM的长度，利用该模型可将皮秒光脉冲压缩为无基座飞秒光脉冲. 关键词： 半导体光放大器 非线性光纤环镜 光脉冲压缩