A vehicle routing problem is a significant problem that has attracted great attention from researchers in recent years. The main objectives of the vehicle routing problem are to minimize the traveled distance, total traveling time, number of vehicles and cost function of transportation. Reducing these variables leads to decreasing the total cost and increasing the driver's satisfaction level. O...

simultaneous routing and resource allocation has been considered in wireless networks for its performance improvement. in this paper we propose a cross-layer optimization framework for worst-case queue length minimization in some type of fdma based wireless networks, in which the the data routing and the power allocation problem are jointly optimized with fuzzy distributed h∞ control strategy ....

Millions of children need to be moved from home to school and vice versa every day. For parents, obtaining a safe transport for their children is a critical issue. Many children find themselves locked in a school bus in the bus parking lot after falling asleep on their way to school, miss the bus, step into the wrong bus, or leave at the wrong station with no method to track them. This research...

Combinatorial problems appear in many real life circumstances, for example, when we drive from one location to another, we usually look for the shortest route, when schools have to allocate students and teachers to classrooms, they do this assignment trying not to crowd the room and not to interfere with the teacher’s schedule, and when the postman has to ride his bike to do the deliveries, he ...

The customized bus (CB) is an alternative public transportation mode that extends the flexibility and coverage of fixed-route transit networks. It allows passengers to make reservations for trips arranges vehicles serve shared rides. However, operation performance limited vehicle routing, number stops, length detour times. Extra detours stops would not be significantly avoided if deploying high...

We examine the implications of school choice on walkability, school travel mode and overall environmental emissions. In developing this proof-of-concept model we show—and quantify—differences between city-wide schools and their neighborhood school counterpart. Our analysis demonstrates how children attending city-wide schools may have heightened travel distance, greenhouse gas emissions, and ex...

There exists very little evidence to determine whether aging school bus drivers pose an increased safety risk with advancing age since few drivers have continued to work beyond age 65 in those jurisdictions that do not have mandatory retirement policies. Consequently, there have not been opportunities where direct data are available to empirically show how safety risk might change as school bus...

periodic vehicle routing problem focuses on establishing a plan of visits to clients over a given time horizon so as to satisfy some service level while optimizing the routes used in each time period. this paper presents a new effective heuristic algorithm based on data mining tools for periodic vehicle routing problem (pvrp). the related results of proposed algorithm are compared with the resu...

Crosstalk delay within an on-chip bus can induces a severe transmission performance penalty. Bus-grouping Asynchronous Transmission (BAT) scheme is proposed to mitigate the performance degradation. Furthermore, considering the distinct spatial locality of transition distribution on some types of buses, we use the locality to optimize the BAT. In terms of the implementation, we propose the Diffe...