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Graph partition quality affects the overall performance of parallel graph computation systems. The quality of a graph partition is measured by the balance factor and edge cut ratio. A balanced graph partition with small edge cut ratio is generally preferred since it reduces the expensive network communication cost. However, according to an empirical study on Giraph, the performance over well partitioned...
The low spectrum utilization has limited the development of wireless communication is a common view In Cognitive Radio (CR). And the idle spectrum holes are too narrow to support high-speed communication is an another problem. The spectrum aggregation technology is supposed a hopeful method for the secondary users (SU) access to the idle spectrum. In order to improve the spectrum utilization, a spectrum...
A novel indoor location algorithm based on dynamic Radio Maps construction in wireless local area network (WLAN) is proposed. The limitation of previous static Radio Map method is that reconstruction work must be taken to adapt the variation of indoor wireless environment. By taking received signal strength (RSS) values varying over time and space into account, a dynamic Radio Map is constructed to...
The optimal resources configuration of equipment maintenance support is kind of typical series-parallel system combinatorial optimization problem. Ants' routing behavior model has many resemblances to the resources configuration of equipment maintenance support. According to this and using ant colony algorithm to the protection of resources allocation optimization, the ability of optimization for...
This paper proposes the optimal K nearest neighbors (KNN) positioning algorithm via theoretical accuracy criterion (TAC) in wireless LAN (WLAN) indoor environment. As far as we know, although the KNN algorithm is widely utilized as one of the typical distance dependent positioning algorithms, the optimal selection of neighboring reference points (RPs) involved in KNN has not been significantly analyzed...
Web service is an application program, which is based on internet, distributed, self-included, self-described and modular. It possesses the attributes of well encapsulation and loose coupling. With the prevailing of Web service, how to select a set of services among large body of services with the same function in order to make the Composite Web Service achieve better performance and better quality...
The problem, such as low efficiency in discovering resource, high usage of network bandwidth, is caused by the frequent mobility of nodes in peer-to-peer network. A self-organizing routing model in mobile peer-to-peer base on dynamic region management is proposed by dint of our improved Meridian model. According to the mobility strength of nodes and introduction of dynamic management, the proposed...
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