桥梁设计中高性能混凝土的应用

随着经济的快速发展和和谐社会的构建,我国的交通行业得到了飞速的发展,桥梁工程是交通建设的重要组成部分,其施工质量对后期运行情况有直接的影响.为保证桥梁工程结构混凝土具有良好的流动性、耐久性及强度,很多桥梁工程在设计施工中常采用高性能混凝土,文中结合工程实例,分析了高性能混凝土的特性及其在桥梁设计施工中的应用.     

我国国有资产管理体制目标模式探索

本对我国国有资产管理体制改革与目标模式作了具体分析，提出了立法监督、行政管理、产权经营企业管理总体思路。     

A Crank-Nicolson Difference Scheme for Generalized Rosenau Equation

Much effort has been devoted to researching the common Rosenau equation,but the numerical method of it has not been studied.In this paper,a conservative Crank-Nicolson difference scheme for an initial-boundary value problem of the generalized Rosenau equation is proposed.Existence and uniqueness of numerical solutions are derived.By method of discrete energy,the second order convergence and stability are discussed.Numerical examples demonstrate the theoretical results.