无粘结预应力圆形贮水池结构设计与工程测试

介绍了某5000m^3无粘结预应力贮水池结构的内力分析过程、结果及结构设计情况，并简要介绍了实际工程施工的测试过程及数据分析结果。     

基于DELPHI5的高校选修课管理系统的设计与实现

主要介绍高校选修课管理系统的设计思想，并着重分析和讨论了后台数据库的设计方法和原理，最后讨论了运用Delphi5开发该系统的整个过程。     

A data model for regions with indeterminate boundaries

Most of spatial phenomena like natural vegetation units and land use areas constantly change over time and have uncertainty spatial extents. Till now, a considerable number of data models have been proposed for spatial objects with sharp boundaries as well as with indeterminate boundaries. However, they mainly concern space and time or space and fuzziness and not yet integrate them into a single unified framework. This paper introduces a formal definition of the conceptual fuzzy spatiotemporal data model, called FSTDM for fuzzy regions based on fuzzy set theory. We also contribute a method of manipulating queries with the presence of both temporal predicate and fuzzy spatial predicate in the condition clause efficiently. We then implement a prototype system.Through the experimental results, we prove that our work can be used to build a specialized system such as GIS, spatial database, and so on.     

Mechanical Properties of Laterally Driven Microresonance with a One-Side Straight-Leg Suspension

The mechanical properties of lateral polysilicon comb-driven microresonators suspended from one-side straight-leg beams, which are widely used in linear microvibromotors, are investigated in this paper.The lateral vibration of the microresonator was modeled assuming that the symmetry of the microstructures and the applied loads are different. Methods were given to calculate the stress, lateral displacement, spring coefficient, and resonant frequency. The results show that the simple mechanical model is a superfluous system with three unknown variables. The results differ from pervious results for a microresonator suspended from double-side straight-leg beams, which has been commonly used to design linear microvibromotors.     

发展中国家比较竞争优势战略

通过分析比较优势、竞争优势发展理论的缺陷,借助层级结构的概念,得出发展中国家经济发展路径应遵循比较竞争优势的发展战略.     

非线性生育率阶段结构的收获模型

建立并分析了一类非线性生育率阶段结构的单种群的收获模型，得到了正平衡点全局稳定的条件，给出了最优收获策略．     

改进Copula对数据拟合的方法

给出相关结构Copula、秩相关系数Spearmanρ与Kendallτ和尾部相关系数η,以及这三个关联性度量与Copula之间的关系,各个相关系数的估计方法.在一个Copula族内进行适当变换,得到新的Copula,使得能更好地拟合样本的各个相关系数.最后,以沪、深日收盘综合指数为例,讨论了二个股市波动率的相关性,建立了一个较好的数学模型.     

模糊数空间上下确界的度量刻划

在模糊数空间上定义了一种新的度量，证明用这种度量可以对序有界的模糊序列的上、下确界进行刻划。     

浅谈机械故障诊断与排除

机械故障复杂多样，根据不同故障类型，采取相应诊断办法，可提高诊断效率。     

工程项目结构分解的优化及应用

工程项目结构分解及其编码是项目管理的基础工作。目前该方法的应用缺乏统一的标准和规范，影响其应用效果。针对这种情况，提出该方法的优化途径－－分解对象标准化，分解步骤统一化，分解规则规范化。进而指出该方法新的应用领域，特别是在项目管理信息集成方面，及对提高工程项目管理水平所起的作用。