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Path optimization problem is an important component of Emergency Logistics. According to the emergency incidents occurring in Emergency Logistics, We build an uncertain programming model, which is based on the shortest travel time as the objective function, and make the model closer to reality. The model use the traffic time as fuzzy variable, the demand quantity of disaster location as random variable,...
Urban eco-transportation system is the development direction of urban transportation system; urban traffic mode structure is an all-important factor that affects the realization of it. Despite a voluminous empirical research of traffic mode structure, most of them have failed to adequately consider the ecology problem. On the basis of satisfying all requirements of eco-transportation system, and according...
Location Set Covering Problem (LSCP) is a traditional problem in the location literature. LSCP is used in locating fire stations, computer networks, and many other service facilities. This paper proposes a covering problem with variable radii. In this problem, the cost to establish a facility is a monotonically increasing function of distance to the farthest covered node by the facility. The problem...
In view of the difficulty to evaluate urban public transport in an objective, comprehensive and accurate manner, an index system and its hierarchical structure for urban public transport evaluation are developed and a mathematical model established by way of the multi-factor hierarchical fuzzy evaluation to engage in comprehensive evaluation of urban public transport. A case study is conducted over...
Support plan evaluation plays a significant role on material system efficiency. Literature reviews indicate that research productions on support plan evaluation and defects of research angle and method still should be mentioned. In this study, support system characteristics are abstracted to determine evaluation criteria of material support plan, and the evaluation model based on fuzzy analytical...
Transport logistics and fleet management problems often fall into one class of the optimization problems. Finding an optimal set of routes for a group of vehicles in the transportation network under defined constraints is known as the Vehicle Routing Problem (VRP). In this paper, we propose a novel hybrid uncertain approach, in which first considers a capacitated VRP whose demands are assumed to be...
To solve the vehicle scheduling sever problem under fuzzy information, the paper takes vehicle's fuzzy travel time and customer's fuzzy due time as fuzzy information parameter and uses the method of subdividing the customer's class to absorb the carriers' knowledge system, builds two deciding-making goals of logistic enterprises' utility maximization and customers' s utility maximization to two kinds...
Product quality is impacted by design quality deeply. This paper discussed comprehensively the evaluation indices of design quality from product function and performance. Fuzzy evaluation method was used to evaluate the design quality. Factors set, weight set and evaluation matrix were established and evaluation model was chosen and solved. As an example, the design quality of mine disaster rescue...
This paper described developing a practical car search system using fuzzy theory. This system aims at supporting car purchasing for a person which is no good with machines as if they ask casually someone who knows more about cars. Unspecific conditions are expressed by the fuzzy set, and the level matching the conditions are expressed by the grade values. To keep more practical use, a GUI form which...
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