HpD在诊治癌症过程中的光敏机理

本文就目前提出的几种HpD的光敏机制,通过离体培养的癌细胞,在HpD的浓度接近诊治癌症的临床条件下进行了比较.初步推断在HpD-光敏诊治癌症过程中起主导作用的机制仍是单态氧.     

基以矩阵环的快速公开密钥密码体制

本文提出了一种公开密钥密码体制,这种体制是以下述的假设为基础的,即在大有限环中求元素平方根,在不知道这个环结构的情况下,要计算它是不可能的。该体制的加解密运算是非常快的,其数据扩展为1:2。     

新型DCS—μXL的控制机能体系

本文介绍最新中小规模集散型控制系统—μXL的控制机能体系及其技术特点。     

Stress variation of soil surrounding tunnel and grouting reinforcement effect based on stress release

With FLAC, a criteria of stress release ratio （SRR）, i.e., about 10% of the relative difference of the ground settlement before and after the supporting system is installed, is incorporated into stress release method （SRM）. At the same time, the Mohr-Coulomb Criterion is used to analyze stress changes around the tunnel induced by excavation. It shows that the surrounding soil around shallow tunnels can be partitioned by loosened zones （unloading zones） and plastic zones among which the shear stresses in the soil are less than 10 kPa below the M-C yield line. Both types of zones are separated. With the increasing of the SRR, the areas of plastic zones and loosen zones gradually increase. The surrounding soil is equally divided into 24 regions in order to study the influence of different grouting regions on the ground settlement. The reinforcing effect of grouting can be modeled by enhancement of the soil strength around the tunnel. By the approach of the SRM, numerical analysis indicates that, in the upper area （top of the surrounding soil about 210°）, the reinforcing effect gradually decreases as the reinforcing region moves from arch springing to the vault of the crown; when reinforcing regions lie in the upside of the surrounding soil, the influence on the ground settlement is generally greater than in the lower part; at the same time, with the increase of the SRR, the influential differences are more and more obvious.     

基于数值模拟方法的中心起爆战斗部破片动态飞散特性研究

针对中心点起爆方式战斗部破片毁伤区域的预测问题，以破片动力学基本方程为基础，同时考虑破片速度沿战斗部轴向变化以及破片飞散方向等影响因素，采用数值模拟方法对战斗部破片在不同时刻、不同工况破片速度与破片空间分布的动态飞散特性开展研究。研究表明：破片动态飞散场呈现对称于弹体纵轴的空心锥结构；随着飞散时间的增加，破片径向速度逐渐减小，飞散半径逐渐增大，破片场形状则由弧形向U形转变；并且对于质量8 g的立方体破片，当破片飞散46.5 ms后，对轻型装甲目标仍具有毁伤能力；破片初始飞散速度相同，增大破片质量可以提高破片场的飞散范围，增强破片存速能力。该研究成果可为目标高效毁伤以及引战一体化设计提供依据。     

乙二醛的应用,生产及其发展前景

综述了乙二醛的性质，应用和两种工业生产方法，并分析了其发展前景。