The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The heterogeneous fleet vehicle routing problem with time windows is a variant of the classical vehicle routing problem. This paper defines a mathematical model of this problem and proposes a variable neighborhood tabu search algorithm to solve it. The initial solution is obtained by GENIUS and the giant tour algorithm. Our algorithm employs a variable neighborhood mechanism to search the optimal...
The safety of navigation of ro-ro passenger ships has been perplexing the shipping circles, while the problem of vehicle safe stowing and securing is an important factor that affects the safe transportation of ro-ro passenger ships. Some specifications are put forward in home and abroad on the research of safe stowing and securing of vehicle on board ro-ro passenger ships. However, it is lacking in...
Along with the economic development, cities are increasingly congested in China. In order to eliminate peak-hour congestion, many cities establish priority lanes such as bus lanes and Olympic lanes. Although priority lanes could help Local Authorities gain its short-term management objectives, at the same time, it would greatly infringe on the legitimate rights of other vehicles and waste the scarce...
Traditional algorithms of VRP often did not consider the loading rate of vehicle, which will partially effects the fuel consumption of the vehicle. So if considering the fuel consumption, there needs a new algorithm to find the optional route of VRP with lowest fuel consumption. Then the genetic algorithm of the model was designed and solved. The simulation result showed that the algorithm is a good...
A serious highway accident with long duration will lead to a great delay. If the extended travel time is beyond travelers' tolerance, they will make a detour by choosing any other roads. However, the driver's behavior of taking other routes will make an impact on the surrounding road network. Thus that impact is called the indirect impact by highway traffic accidents in road network. The range of...
Since 2003, the Chinese government has taken a series of targeted policies and measures to suppress road accidents. In recent years, in the case of the rapid economic development, rapidly growing motor vehicle amount, and changes greatly in road safety environment, China successfully achieved the objectives that road accidents from the peak to be suppressed, until to the decline year-by-year. The...
Undesirable risk of hazardous materials transportation can be mitigated by a good routing. most scholars focus on the routing of hazardous materials transportation, but few papers concern with load-varied. The paper illustrates a routing model for the hazardous materials transportation under load-varied network. We use the Traditional Risk model for path risk assess, present a quadratic modeling methodology...
Former research of transport reliability focuses on road network, few of which refer to the intersection traffic reliability in microcosmic level. The paper proposes the conception of traffic reliability based on which the supply-demand reciprocity is analyzed, and brings forward the methodology that the disabled condition should be differentiated according to distinct system functions. Aiming at...
According to the randomness and weak economy properties of the Emergency Rescue Routing Problem (ERRP), a chance-constrained programming model is constructed based on a stochastic road network. In this model, we consider there are multiple emergency rescue departments serving for a single emergency site, and the travel times between any two nodes are stochastic variables. As the stochastic ERRP is...
Nowadays, Rail-guided Vehicle (RGV) has been widely used in the logistics system, and some large storage systems often use double RGV to operation simultaneously. Then RGV operation policy and influence on the efficiency of the logistics system become interesting problems to designers. This article describes the Path-divided Mode and the Path-integrated Mode of operating policy of double RGV transportation...
The rapid development of economy promotes the acceleration of urbanization, but in many cities, especially in the medium-sized city, traffic problem has become the bottleneck of restricting the development.This paper analyses the causes of the medium-sized city traffic accidents and existing problems of the road planning, construction, road traffic management ,and proposed herein with measures for...
Vehicle routing problem is an important combinatorial optimization problem. It has an important position in logistics optimization and supply chain management theory. Due to traffic flow, traffic incidents and other factors, the travel speed and travel time of road has large time-variability and randomness in real transport network. The study of vehicle routing problem in time-dependent network has...
Adaptive cruise control (ACC) system is a Driver assistant system, which can provide safe and comfortable driving. Based on the analysis of ACC system, a parameter self-tuning fuzzy-PID algorithm is developed to design the ACC control strategy. According to the traffic condition, the parameters of PID controller are adapted on-line by fuzzy rule. The simulation results show that the parameter self-...
We start with the background and the solutions of vehicle routing problem, and then focus on the interpretation of Tabu search algorithm and the impact of its key factors. In particular, the idea of tabu search algorithm is applied to solve the vehicle routing problem. We design a new intuitive and easy to understand client-direct-arrangement solution method, and finally realize the algorithm through...
A new floating car data technology in Hefei has been developed that provides real-time traffic information within Hefei's two ring road. It is based on the collection of localisation data, speed, direction of travel and time information from GPS in vehicles that are being driven. The scope of the project is to development and creation of a Web-based data mart for the collection of FCD. The aim of...
This study focuses on customer relations management, and utilizes route optimization to achieve efficient delivery. It applies a service-directed architecture technology to allow clients, sellers, and logistics industries in the supply chain to communicate more closely. Through interactive online orders, consumers could conveniently monitor the status of their orders. In this era of energy deficiency,...
Red-light violation video detection is one of the critical techniques in the intelligent transportation system, it is superior to traditional detection methods in aspect of function and maintenance. According to the practice of crossroads and the characteristics of vehicles running red-light, this paper presents a vision vehicle detection algorithm based on detection region to detect moving vehicles,...
We develop a single batching machine model that incorporates transportation before processing with job waiting time constraint. In this model, there are some vehicles with unit capacity that travel between the machine and the holding area, and the waiting time of each job before processing can not be greater than a given upper bound. The batching machine has a capacity limit and incurs a processing...
This paper constructs a distribution model of cold chain logistics based on vehicle routing problem with time windows, including cooling cost, fixed/transportation cost and other costs. Then apply this model and general model to a numerical example consisting of 20 customers separately. The results differ from each other, which suggests that it is necessary to do research on distribution problem of...
In the platform of the urban transit system, a certain gap is inevitably made between the subway vehicle and the platform, and the gap gets wider in the curved area of the platform. This gap contributes to decrease passengers' safety. Especially, it endangers children's safety. Nowadays plug-in type doors are installed in the newly designed urban transit system. It is worldwide trend to reduce the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.