非均匀内热源组合球壁稳态导热微分方程组的解

用热流分流和叠加，直接得出非均匀内热源组合球壁稳态导热微分方程组，分别在第一类、第二类和第三类边界条件下的解。     

New Boundary Treatment Methods for Lattice Boltamann Method

In practical fluid dynamic simulations, the boundary condition should be treated carefully because it always has crucial influence on the numerical accuracy, stability and efficiency. Two types of boundary treatment methods for lattice Boltzmann method (LBM) are proposed. One is for the treatment of boundaries situated at lattice nodes, and the other is for the approximation of boundaries that are not located at the regular lattice nodes. The first type of boundary treatment method can deal with various dynamic boundaries on complex geometries by using a general set of formulas, which can maintain secon-order accuracy. Based on the fact that the fluid flows simulated by LBM are not far from equilibrium, the unknown distributions at a boundary node are expressed as the analogous froms of their corresponding equilibrium distributions. analogous forms of their corresponding equilibrium distributions. Therefore, the number of unknowns can be reduced and an always-closed set of equations can be obtained for the solutions to pressure, velocity and special boundary conditions on various geometries. The second type of boundary treatment is a complete interpolation scheme to treat curved boundaries. It comes from careful analysis of the relations between distribution functions at boundary nodes and their neighboring lattice nodes. It is stable for all situations and of second-order accuracy. Basic ideas, implementation procedures and verifications with typical examples for the both treatments are presented. Numerical simulations and analyses show that they are accurate, stable,general and efficient for pracitical simulations.     

日本东京的污水处理及循环利用

如今，将污水转变成饮用水已不再是幻想。如果此项技术再进一步优化，我们就可以饮用曾经冲刷过马桶的污水。最近，由于东京污水排放管理局的努力，东京的污水正在得到处理并循环利用．市区的河流也在不断地净化。东京的新宿特区是一个现代化程度很高的地区。日本国际协力事业团（JICA）的总部就设在这里。经过处理的污水被输送到新宿国际大厦，再分送至其它高层建筑物作冲洗马桶之用。这些污水在距新宿大约2公里的落合污水处理厂进行净化处理。东京市的23个区中总共有11套净水设施，郊区有7套。处理范围几乎涉及到所有家庭住户。整个污水…     

计算机辅助设计软件在SCC4F-548型圆机上的应用

通过计算机辅助设计软件Adobe公司的Photoshop5．0和corel公司的Coredraw9．0在SCC4F-548型圆机上的应用，扩大了其花型图案设计空间，创造更美观、更有时尚气息的花型图案．     

柱形波导中波型的正交性研究

由二维格林恒等式推证了柱形波导中本征函数及其导数及场分量的正交性.无论是本征函数之间或是场分量之间,都存在着一定的正交关系.     

筒形件拉深过程的数值模拟

本文研究了板料成形模拟中减速系数选取和压边圈简化模型，编制了相应的有限元数值模拟程序ＳＰＩＤ。并模拟研究了筒形件拉深过程中板厚变化规律及摩擦系数的影响，计算结果与试验值比较吻合，表明该分析程序的可靠性。     

金属陶瓷四极电子管的分析及维护办法

本文介绍10KV中波广播发射机金属陶瓷四极电子管的主要参数、结构．并进行分析，且提出采取的维护办法。     

最小条件评定圆度误差的优化计算

本文介绍用优化方法,根据最小条件圆准则编制程序,可在夏普PC-1500、卡西欧PB-700等微机上计算圆度误差。文中还讨论了在计算圆度误差时径向偏移量及其所选用放大比的不同对圆度误差的影响。并推导了失真畸变影响圆度误差的极值△_(max)和放大倍数K、偏心距e等的关系式,定量说明它们之间的关系。     

三种60kA铝电解槽槽壳的对比研究

60kA摇篮式铝电解槽槽壳有多种类型。作者采用SAP6大型通用程序,分析计算了其中主要的三种,对比了它们的刚度和强度,得出相对优劣的明确结论,找到了改进设计并使之达到定型的方向。