混凝土工程的外观质量控制

本文介绍了混凝土工程常出现的外观缺陷．分析了混凝土外观缺陷形成的原因．提出了施工中防治混凝土外观缺陷的质量控制措施并就如何保证混凝土表面质量问题提出了自己的看法．     

水泥混凝土路面裂缝形成原因机理分析

随着我国公路建设事业的快速发展．对路面结构要求越来越高。在高等级公路建设中水泥混凝土路面以其强度高．稳定性好．耐久性好,养护维修费用低、经济效益高、有利于夜间行车的特点越来越受到人们的青睐。同时,水泥混凝土路面损坏后修复困难也是限制水泥混凝土路面进一步推广应用的主要障碍。     

浅谈沥青路面病害形成及解决途径

对沥青混凝土路面病害形成的原因及解决途径。     

连云港入境集装箱查验模式实行全申报新机制

连云港检验检疫局改革入境集装箱查验模式,实行全申报新机制,从源头上把好人境集装箱安全卫生关,在实现100％查验目标基础上,通关速度由过去2～3天缩短到几个小时。新的查验机制实现了通关效率、把关成效、企业降费与港口周转加快的“四赢”局面。     

山区高速公路高填土路基病害分析及处理措施

由于国民经济的发展和路网完善的需求,高速公路逐步进入山区,由于山区地质地貌条件的限制和公路线形的制约,深挖高填路基将不可避免,本文重点分析高填路基形成原因及病害的表现形式,并从设计、施工和技术方面提出处治措施。     

以机制创新为主题 进行第二次思想解放——兼对五岳公司产品发展的理性思考

最近,集团公司领导同志指出,中国重汽的事业正处于重要的战略机遇期,我们正站在企业发展的关键节点,提出“解放思想,在体制创新上再下功夫”的要求,这有着很深刻的意义。     

工程项目协调管理机制研究

工程项目协调管理职能需要通过各种管理活动来实现,而协调管理职能的实现是由各项管理活动中所蕴含的协调管理机制决定的。本文在阐明工程项目协调管理机制内涵的基础上,提出了五种重要的工程项目协调管理机制：决策机制、合作机制、沟通机制、激励机制与约束机制,并由此构建了整合这五种协调管理机制的运行模式,以期为工程项目协调管理实践提供理论基础。     

Solving resource-constrained multiple project scheduling problem using timed colored Petri nets

To solve the resource-constrained multiple project scheduling problem (RCMPSP) more effectively, a method based on timed colored Petri net (TCPN) was proposed. In this methodology, firstly a novel mapping mechanism between traditional network diagram such as CPM (critical path method)/PERT (program evaluation and review technique) and TCPN was presented. Then a primary TCPN (PTCPN) for solving RCMPSP was modeled based on the proposed mapping mechanism. Meanwhile, the object PTCPN was used to simulate the multiple projects scheduling and to find the approximately optimal value of RCMPSP. Finally, the performance of the proposed approach for solving RCMPSP was validated by executing a mould manufacturing example.     

Facility Layout Based on Sequence Analysis： Design of Flowshops

A computer-aided method to design a hybrid layout—tree-shape planar flowlines is presented. In newtype flowshop layout, the common machines shared by several flowlines could be located together in functional sections. The approach combines traditional cell formation techniques with sequence alignment algorithms. Firstly, a sequence analysis based cell formation procedure is adopted; then the operation sequences for parts are aligned to maximize machines adjacency in hyperedge representations; finally a tree-shape planar flowline will be obtained for each part family. With the help of a sample of operation sequences obtained from industry, this algorithm is illustrated.     

建筑结构倒塌机制研究概述

结构倒塌机制分析是近二十年来在有限元技术充分发展的基础上演变发展起来的,倒塌机制的核心技术是围绕以结构构件为主的离散单元分析技术。由于结构在濒临倒塌之前,传统的隐式有限元法无法绕过矩阵奇异等问题,所以不能进行真正的倒塌计算。尽管张雷明与刘西拉基于广义函数建立的混合铰杆模型将此问题向前进行了发展,但所得到的碰撞力物理意义尚不明确,