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In the large-scale Wireless Metropolitan Area Network (WMAN) consisting of many wireless Access Points (APs),choosing the appropriate position to place cloudlet is very important for reducing the user's access delay. For service provider, it isalways very costly to deployment cloudlets. How many cloudletsshould be placed in a WMAN and how much resource eachcloudlet should have is very important for...
Cloud computing enables users to access different resources conveniently based on the ‘pay-as-you-go’ model. However, the unit cost of these on-demand instances are usually high. The spot instances provide a dynamic and cheaper manner for renting resources from the cloud. However, failures are often occurred due to the fluctuations of the price of the spot instance. It is a big challenge to determine...
As an emerging technology, Cooperative Device to Device (CD2D) communication has been considered to alleviate capacity shortage problem. In a heterogeneous CD2D network, multiple homing mobile devices (MMDs) may act as relays for the cooperative communication of ordinary mobile devices (OMDs). Under this setting, how to provide incentive mechanisms and motivate MMDs to lease spare bandwidths and allocate...
Among the models that describe the dynamic behaviors of financial market, the discrete time microstructure model stands out because of its efficiency in considering the relationship between the price, excess demand, and liquidity of a market. However, the estimation problem of such a microstructure model is challenging, because the model is essentially a nonlinear state space model. A decent solution...
With the development of cloud computing, there is an increasing number of market-based mechanisms for cloud resource allocation. Inspired by the emerging group-buying websites, we advocate that group-buying can be applied to cloud resource allocation, and thus cloud providers can benefit from demand aggregation due to the advantage of group-buying in attracting customers, while cloud users can enjoy...
In this paper, a novel P2P network model for cloud computing is proposed to prevent the "calculation capacity" from being controlled by a few tycoons. The common users can become a part of "cloud" by joining as nodes. To solve "free-ride" and "the tragedy of commons" arising from p2p network model, "cloud" is divided into many clusters, and the incentive...
In digital forensics, data stored in a hard disk usually contains valuable evidence. Preserving the integrity of the data in the hard disk is a critical issue. A single hash value for the whole hard disk is not appropriate as the investigation may take a long time and latent sector errors (LSEs) (bad sectors due to media imperfection, for example) which cause a sector suddenly unreadable will make...
Presents evaluation method of indoor environment based on Rough Sets theory for one university library. According to subjective survey results from questionnaire about thermal environment, visual environment, aural environment, air quality environment and spatial environment of the university library, the decision tables are established for knowledge reduction, significances of eleven condition attributes...
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