大宁调蓄水库工程建设管理概述

详细介绍了大宁调蓄水库建设过程中的工程管理和施工质量控制措施,以便为类似工程建设提供参考。     

Enhanced energetic reasoning-based lower bounds for the resource constrained project scheduling problem

We present new and effective lower bounds for the resource constrained project scheduling problem. This problem is widely known to be notoriously difficult to solve due to the lack of lower bounds that are both tight and fast. In this paper, we propose several new lower bounds that are based on the concept of energetic reasoning. A major contribution of this work is to investigate several enhanced new feasibility tests that prove useful for deriving new lower bounds that consistently outperform the classical energetic reasoning-based lower bound. In particular, we present the results of a comprehensive computational study, carried out on 1560 benchmark instances, that provides strong evidence that a deceptively simple dual feasible function-based lower bound is highly competitive with a state-of-the-art lower bound while being extremely fast. Furthermore, we found that an effective shaving procedure enables to derive an excellent lower bound that often outperforms the best bound from the literature while being significantly simpler.     

An optimal procedure for minimizing total weighted resource tardiness penalty costs in the resource-constrained project scheduling problem

We present an optimal solution procedure for minimizing total weighted resource tardiness penalty costs in the resource-constrained project scheduling problem. In this problem, we assume the constrained renewable resources are limited to very expensive equipments and machines that are used in other projects and are not available in all periods of time of a project. In other words, for each resource, there is a dictated ready date as well as a due date such that no resource can be available before its ready date but the resources are permitted to be used after their due dates by paying penalty cost depending on the resource type. We also assume that only one unit of each resource type is available and no activity needs more than it for execution. The objective is to determine a schedule with minimal total weighted resource tardiness penalty costs. For this purpose, we present a branch-and-bound algorithm in which the branching scheme starts from a graph representing a set of conjunctions (the classical finish-start precedence constraints) and disjunctions (introduced by the resource constraints). In the search tree, each node is branched to two child nodes based on the two opposite directions of each undirected arc of disjunctions. Selection sequence of undirected arcs in the search tree affects the performance of the algorithm. Hence, we developed different rules for this issue and compare the performance of the algorithm under these rules using a randomly generated benchmark problem set.     

中国电信移动网络HACCG的建设方案

文章对MIP及内容计费进行了详细的总结,并提出了中国电信移动网络HA/CCG的建设方案和策略,以及HA/CCG与周边系统的接口要求,能较好地指导电信运营商的准备工作和HA/CCG的网络建设.     

建筑分包工程的成本管理措施探讨

在建筑行业大力发展的今天,工程分包已经成为一种普遍现象。如何让工程总承包商和分包商进行良好的成本管理,达到预期目标并实现共同发展已成为急需研究的课题。结合我国分包工程的现状,提取了影响分包工程成本管理的26个因素,而后从选择分包商、合同管理、现场控制、签证管理和支付制度五个方面,就工程分包过程中的成本管理提出了相关管理措施建议。     

金鸡滩水电厂2号机组异常运行分析及处理

金鸡滩2号机组在运行中出现了油压装置压油泵频繁打油,受油器下游侧端盖与挡油环、端盖与小轴相互碰刮的异常运行情况,文章对此异常情况进行了分析并介绍了故障的排查处理过程,对类似机组的相同故障处理有借鉴作用。     

彭家岩水电站压力管道滑坡治理技术

对彭家岩水电站压力管道滑坡治理工程进行了分析总结。实践证明,根据彭家岩水电站工程地质条件和滑坡机理分析,所采取的完善排水、外封内排,卸荷减载、稳定坡脚,下挡上护、灌桩支撑的工程治理技术措施是有效的,通过综合治理保障了电站的安全可靠运行。     

基于“卓越计划”的运输管理学教学改革研究

运输管理学是物流工程专业核心课程之一。今依据对物流企业的调研结果,从课程定位、教材选择、课堂内容及课堂教学方法等方面进行课程教学改革研究,提出教学内容的模块化、工作项目化及驱动任务设计等环节,构建多种手段并用的课程教学体系。结果表明,教学改革充分发挥了学生的积极性和创造力,为培养出高质量的物流工程技术人才打下了基础。     

DEMATEL-based model to improve the performance in a matrix organization

Carrying out a design project for a high-tech facility requires a large amount of special knowledge in order to deal with the specific requirements from the client. Often the client forms a matrix organization, structured with several interrelated functional and project divisions to dictate the various requirements and needs. However, an ill-defined matrix organization is likely to result in late and inadequate decisions. This in turn may result in a poorly performing design. Identifying those divisions within the organization that perform poorly in the way they provide information for the project is critical. Therefore, this study proposes an innovative model to identify those divisions that may be responsible for the poor performance of the design project. The proposed model integrates the satisfied importance analysis (SIA) and the decision making trial and evaluation laboratory technique (DEMATEL). The SIA evaluates the performance of each division, while the DEMATEL captures the causal relationships among divisions to generate an influence-relations map. The proposed model is applied to a real-world high-tech facility design project in Taiwan to demonstrate the strengths of the model.     

FBG传感器在水下结构工程中的应用

近年来,光纤光栅传感技术在我国发展很快,已经在桥梁、土建等多个领域中得到了应用,但在水工领域的应用还很少.本文结合白鹤梁工程实例,探索该项技术在这一领域应用的可行性.开展的光纤光栅应变、温度传感器在水下工程领域中较大规模的应用研究结果表明：FBG具有很好的防水性能,测试精度高,长期稳定性好,信号传输距离远,为水下结构的长期监测提供了一种可靠有效的手段.