石灰粉煤灰稳定石屑的基层施工技术

文章详细论述了道路施工中石灰、粉煤灰、稳定石屑作为基层结构的要求、技术指标和施工工艺。     

论中国现代城市建筑设计中形式美的科技应用趋向

通过对结构、空间、色彩中科技应用的分析,述评了中国现代城市建筑设计中形式美的科技应用趋向。     

Microstation与AutoCAD在计算机辅助设计方面的比较

从常用二维工具、三维造型、外部图形数据的交换与图像处理和对Windows的支持等方面,探讨了Microstation与AutoCAD在计算机辅助设计方面各自的优劣及适用范围。     

基于ASP.NET的毕业设计选题系统构建

介绍了ASP.NET技术,并对基于ASP.NET技术开发的B/S结构毕业设计选题系统的功能进行了详释。     

Extremal Self-Dual [50, 25, 10] Codes with Automorphisms of Order 3 and Quasi-Symmetric 2-(49, 9,6) Designs

Five non-isomorphic quasi-symmetric 2-(49, 9, 6) designs are known. They arise from extremal self-dual [50, 25, 10] codes with a certain weight enumerator. Four of them have an automorphism of order 3 fixing two points. In this paper, it is shown that there are exactly 48 inequivalent extremal self-dual [50, 25, 10] code with this weight enumerator and an automorphism of order 3 fixing two points. 44 new quasi-symmetric 2-(49, 9, 6) designs with an automorphism of order 3 are constructed from these codes.     

Simultaneous Pseudo-Timestepping for PDE-Model Based Optimization Problems

In this paper we present a new method for the solution of optimization problems with PDE constraints. It is based on simultaneous pseudo-time stepping for evolution equations. The new method can be viewed as a continuous reduced SQP method in the sense that it uses a preconditioner derived from that method. The reduced Hessian in the preconditioner is approximated by a pseudo-differential operator, whose symbol can be investigated analytically. We apply our method to a boundary control model problem. The new optimization method needs 3.2-times the overall computational effort of the solution of simulation problem alone.     

浅析机械制图教学与创新教育

文章阐述了在机械制图教学中，如何培养学生画图、读图能力与创新能力，以及它们两者间的辩证关系。     

PASCAL—SPECPK—酸碱离解常数的确定

完成了用分光光度数据确定二元质子酸碱重叠离解常数的程序设计,可快速、准确测定 pK_1和 pK_2,并给出模拟反算的离差及标准误差.程序用 TurboPascal(V5.0)编制.     

矩形板极限承载能力的探讨

船舶及钻井平台等的上层建筑和潜水器内部平面舱壁板，大多采用弹塑性设计．考虑到这种舱壁板是一次性承载，为提高舰船或平台的承载能力，减轻重量，以提高经济性和增加有效载荷，采用屈服线分析法设计上述壁板，并从理论计算和试验两个方面对该方法进行了探讨，得到了板的极限承载能力的数据并提出了该设计方法下的安全系数．     

方位伺服系统扭转振动固有频率的分析

本文阐述了伺服系统结构设计中估算系统固有频率的必要性,介绍了一种分析和计算经纬仪方位伺服系统扭转振动固有频率的方法。