The Perturbation Parameter in the Problem of Large Deflection of Clamped Circular Plates

In the problems of large deflection of clamped circular plates under uniformly distributed loads,various perturbation parameters relating to load,deflection,slope of deflection,membrane force,etc.are studied.For a general perturbation parameter,the variational principle is used for the solution of such a problem.The applicable range of these perturbation parameters are studied in detail.In the case of uniformly loaded plate,perturbation parameter relating to central deflection seems to be the best among all others.The method of determination of perturbation solution by means of variational principle can be used to treat a variety of problems,including the large deflection problems under combine loads.     

The perturbation parameter in the problem of large deflection of clamped circular plates

In the problems of large deflection of clamped circular plates under uniformly distributed loads, various perturbation parameters relating to load, deflection, slope of deflection, membrane force, etc, are studied. For a general perturbation parameter, the variational principle is used for the solution of such a problem. The applicable range of these perturbation parameters are studied in detail. In the case of uniformly loaded plate, perturbation parameter relating to central deflection seems to be the best among all others. The method of determination of perturbation solution by means of variational principle can be used to treat a variety of problems, including the large deflection problems under combine loads. This paper is completed under the guidance of Prof. Chien Wei-zang.     

APPLICATION OF SHOOTING METHODS FOR TWO-POINT BOUNDARY VALUE PROBLEMS OF ORDINARY DIFFERENTIAL EQUATIONS WITH PARAMETERS IN HYDRODYNAMICS

In this paper,first we introduce the shooting method (including the method ofadjoints and the method of quasilinearization) for two-point boundary value problems ofordinary differential equations with parameters.and give out an example of solvinghydrodynamic lubrication equation by using the shooting method.The calculated resultsare satisfactory.     

弹丸入水空穴的试验研究

本文主要阐述三种不同形状不同速度的弹头,在相同条件下,以每秒几百米速度平行射入水中以后,伴随出现的各种值得研究的空穴生存的现象。     

基于MMPP的802.11网络性能

提出并建立了一个基于马尔可夫调制的泊松过程MMPP(M arkovModu lated Poisson Process)和间歇泊松过程IPP(Interrupted Poisson Process)的系统模型,从新用户的到达和系统中用户发起的新业务两个方面着手,考察了在受系统门限值约束情况下的接入系统的新用户数量和系统内用户发     

Pd及其含量对Au/CeO_2催化剂甲醇部分氧化制氢性能的影响

采用聚乙烯吡咯烷酮(PVP)保护乙醇还原法制备了不同Pd含量的Au-Pd/CeO2催化剂,考察了Pd及其含量对Au/CeO2催化剂甲醇部分氧化制氢反应性能的影响,并运用XRD、TPR、CH3OH-TPD和H2-TPD等技术对催化剂进行了表征。结果表明,Pd的加入提高了Au/CeO2催化剂的活性和氢气选择性,当Au/Pd     

束缚定态径向Schrödinger方程的节点解法

本文介绍了束缚定态径向Schrödinger方程的节点解法^[1,2]。详细分析了其理论的依据,给出了实施步骤和注意事项。文末还附了二个计算实例。和其它方法相比,本解法占用内存少,运算速度快而且计算精度高。可在内存256K,字长16位的PC机上实现。     

链分子结构态中的子体关联

本文从微观多体理论出发,给出了三中心位阱壳模型投影交分法公式,对⁹Be 的正宇称低激发态能级进行了计算,并着重地分析了可能的链分子结构中的⁸Be 子体关联和⁵He 子体关联.     

根据多普勒展宽测定微型环流器等离子体的离子温度

用转镜式扫描光谱仪获得了微型环流器放电中不同时刻的氢等离子体的扫描光谱及氢原子光谱的H_α和H_β谱线的瞬时轮廓。根据谱线的多普勒展宽,测定了放电期间离子温度随时间的变化;亦观察了在发生破裂不稳定性时离子温度的变化。     

脉冲激光在液体中激发的声波特性研究

理论上分析了脉冲激光在液体中产生的声波波阵面随光声源形状的变化,以及不同激发机制下光声脉冲波形的差别,并从实验中得出了脉冲CO2激光光声脉冲频谱特性.结果表明光声波波阵面为球面或柱面,热弹机制激发双极性的光声脉冲,汽化机制激发单极性的光声脉冲,CO2脉冲激光在水中激发的声波频谱峰值主要在100 kHz以下.通过选择光声源的形状和激发机制可以获得所需的光声信号.