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Most vehicle routing systems use local map data, and can only handle static customer demand and transportation information. This paper presents a solution to develop dynamic vehicle routing system based on online map service. Google maps API is adopted to construct map related functions like route display, address geocoding, distance matrix and so on. A Variable Neighborhood Search algorithm is designed...
In cloud computing, an important issue is virtual machine placement (VMP), selecting the most suitable set of physical hosts for a set of virtual machines. In this paper, we present a novel solution to the VMP problem called VMPMBBO. Our scheme treats the VMP problem as a complex system, and utilizes the biogeography-based optimization (BBO) technique to optimize the virtual machine placement that...
This paper designed a circuit breaker on-line monitoring system based on S3C2440A core controller. With the high speed and high precision extended A/D, this device can sample signals on real time. It is fast, easy networking and convenient for remote data transmission by Ethernet. The embedded linux operating system, which can be cut arbitrarily and easy to translate, is used in this device. This...
Current load balancing method for large scale spatial data network service can't dynamically adjust the load of spatial data servers according to the characteristics of spatial data. We propose a content-based spatial data dynamic load balancing method, which can dynamically group spatial data servers according to geographical position relativity and accessing heat of spatial data to improve Cache...
After analyzed the problem in the GlobeSIGht system in existence when the number of visitors rised sharply, which made the burden on the server increase rapidly; the respond rate was much slower than before, which must be influence the application effect of users, it was presented a kind of method, that was, making use of the mobile agent to transfer the tasks from fully loaded servers to the idle...
Current pervasive computing systems always focus on the local area network (LAN) environment, for example, an intelligent room or intelligent building. This paper uses mobile agent to implement the resource and service migration mechanism, and make the pervasive computing system adaptable to work in wide area networks (WAN). The work in this paper includes three parts: (1) introducing mobile agent...
In cluster file system, the meta-data represents the key information of a file. In order to make sure the safety of meta-data, the most of cluster file system write the meta-data to disk as soon as possible to suffer the possible failure of underlying facilities, such as node accidentally crash. The synchronous disk write of meta-data is a performance bottle of cluster file system. This paper presents...
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