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Schedule, cost and quality control are main aspects in construction project management. Taking duration, cost and quality into account simultaneously, and keeping the balance among them during the whole process of project management are significant for the improvement of the overall benefits of construction project. In general, there is a trade-off between duration, cost and quality to complete a...
Decision-making problem is the process of finding the best option from all of the feasible alternatives. To some extent, decision-makers usually are more confident making linguistic judgments than crisp value judgments. The aim of this paper is to extend the TOPSIS method to decision-making problems with fuzzy data. In this paper the fuzzy theory is introduced into the multi-objective decision making(MODM)...
On the basis of the minimum principle of the total cost, using the structure of logistics network and Mixed-integer Non-linear programming, we propose a mathematical model, taking the uncertainty of demand and number of recall and return of goods, the dynamicity of closed-loop network, the environment of E-commerce, and the time value of currency into account. And then we use LINGO to solve the problem,...
Generally, hydroelectric projects have long construction period, and its investment scale is very big. Simultaneously, its construction technology is difficult. Under these conditions, how to balance construction cost, schedule, and quality is always a problem concerned by constructors. In construction management, the optimum goal is minimum cost with the guarantee for schedule and quality. This paper...
It is well known that construction project management involves such objectives as duration, cost, quality, resource leveling and so on. It is necessary to integrate and balance multiple objectives in management process. So this paper firstly analyzes single-objective optimization models such as duration-cost model, duration-quality model and resource leveling model and the relationship between duration,...
Aiming at solving the difficulty in ecological treatment of high-steep slope, the paper introduces an ecological recovery technique-the concretes biotechnics slope (CBS), which is a comprehensive slope protection method combining shallow protection with greening. Firstly, the technological process and main materials of CBS are introduced. A series of physical, chemical, mechanical, and greening performance...
With the development of economy, in recent years, China's logistics infrastructure has been the rapidly developed, at the same time; there have been blind investment and competition with each other, the logistics infrastructure facilities tendency. For the situation of many, small, weak, scattered, slow in logistics resources, the concept of integration was put forward, In China the rapid and steady...
Based on the theory of thin shell, a simplified calculation model is raised to conduct the analysis of the internal force of variable cross-section of shell concrete structure reinforced by ring beams under various loads. The model selects one-sixteenth of a sphere as the computing unit and simplifies the node, transmit only shaft and shear instead of moment. The calculation diagram selects three...
Time-cost optimization problem is one of the most important aspects of construction project planning and control. Construction planners must select appropriate resources, including crew size, equipment, methods and technologies to perform tasks of a construction project. In general, there is a trade-off between time and cost to complete a task; the less expensive the resources, the long it takes....
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