钢球撞击双层带间隙保护板炸药柱的爆炸分析

采用LS-DYNA3D动力有限元程序对钢球撞击双层带间隙保护板炸药柱的爆炸过程进行了数值模拟分析。分析中采用了流固耦合与动力学接触模式,获得了钢球撞击的临界起爆速度,爆炸产生的峰值压力。研究表明,采取适当的保护措施,炸药制成的部件或装置的安全性能够得到保证。     

独玉的成矿大地构造背景分析

独玉矿床位于华北板块和华南板块之间的秦岭造山带中段，其成因与秦岭造山带的构造演化密切相关。利用岩石化学方法判别及ESCORT专家系统分析可知，独山岩体属于发育在秦岭洋洋壳上的岛弧火山岩，它为独玉的形成准备了物质条件。随着秦岭造山带的逐步形成，该岩体在断裂、挤压作用下被抬升至地表，从而形成孤立的岩体——独山岩体。     

从烂版废液中回收硫酸铜实验的改进

改进了从烂版废液中回收硫酸铜的实验。并且回收的硫酸铜纯度在95％以上。原料中的铜近于定量回收，污染也小，并进一步指出了工业应用的可能性。     

用复变函数方法求解在横向载荷作用下的固支圆板

本文利用文献中的方法具体的求解了固支圆板在横向载荷作用下的解。     

考虑剪切效应有限变形粘弹性板的动力稳定性

Based on Reddy‘s theory of plates with higher-order shear deformations and the Boltzmann superposition principles,the governing equations were established for dynamic stability of viscoelastic plates with finite deformations taking account of shear effects,The Galerkin method was applied to simplify the set of equations.The numerical methods in nonlinear dynamics were used to solve the simplified system.It could e seen that there are plenty of dynamic properties for this kind of viscoelastic plates under transverse harmonic loads.The influences of the transverse shear deformations and material parameter on the dynamic behavior of nonlinear viscoelatic plates were investigated.     

巴林左旗出土辽代青铜佛板图像分析

巴林左旗盖家店出土辽代青铜佛板,为便携式类佛龛造像。佛板内容关联北朝以来数百年造像史,还多有牵涉印度造像艺术,反映了基层民众的西方净土信仰情况,不同于寻常所见具有官方性质的辽代佛教造像,有助于深化认识辽代佛教物质文化和社会。     

既有线板式橡胶支座横向限位器的研制

分析既有线提速引起桥梁横向振幅增大的原因,在此基础上研制既有线板式橡胶支座横向限位器,详细介绍其材料参数和施工工艺,为列车提速创造安全条件,供既有线改造设计提供参考。     

A Nonlinear Dynamical Theory of Non-Classical Plates

In this paper, a new nonlinear formulation of plates, including shear and rotatory inertia and transverse normal stress effects, is developed by means of general assumptions, of which the von Karman-type formulation and some thick plate theories are special cases. To keep the formulation fairly general, the problem addressed in this paper simultaneously includes: the effects of shear deformation according to the geometric deformation similarity of the cross-section, the rotatory inertia, and the transverse normal stress. The three-dimensional compatible equations are applied to derive the basic equations. Numerical results are given for linear and non-linear analysis of plates. This Work was supported by the Natural Science Fundation of Shanghai for Returning Scholars     

一类半线性二维积分微分方程

考虑线性粘弹性板振动所引出的半线性积分微分方程的初边值问题，通过解的先验估计利用Leary-schauder不动点定理在某些条件下得到了初边值问题锵的存在唯一性。     

车牌识别技术中字符切割新算法

先对切割下来的车牌进行水平扫描,确定车牌上文字在水平上的大致范围;然后再对确定水平范围后的车牌图像进行竖直扫描确定车牌上每个字符的大致宽度;最后把它们切割下来并进行归一化处理,为下一步车牌特征提取打下了基础。实验结果的数据表明该方法对车牌上字符的切割具有很好的效果。