Fractal image coding is one of the most prominent compression technologies. It can be also used for industrial applications like image indexing methods and image retrieval methods. On the other hand, GPGPU (General Pu...
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ISBN:
(纸本)9781457704345
Fractal image coding is one of the most prominent compression technologies. It can be also used for industrial applications like image indexing methods and image retrieval methods. On the other hand, GPGPU (General Purpose computing on Graphic Processing Unit) attracts a great deal of attention, which is used for general-purpose computations like numerical calculations as well as graphic processing. In this paper, we evaluate two parallel programs for adaptive fractal image coding algorithms on GPUs by using CUDA (Compute Unified Device Architecture) and and discuss the effectiveness of parallel programs using index vectors. the adaptive approach can achieve the image compression with given quality level by changing the size of range blocks in any location.
Open intelligent space is a space where mobile Agents can move in an unconstrained physical manner. While such a space enables a wide range of contextual applicationsthat address the needs of mobile users, it introdu...
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Biological sequence processing is a key of information technology for molecular biology. this scientific area requires powerful computing resources for exploring large sets of biological data. Multiple sequence alignm...
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distributed file-systems are a popular storage abstraction for cloud-computingapplications. they provide generic data access for different applications in order to pass information between computing nodes and to save...
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distributed file-systems are a popular storage abstraction for cloud-computingapplications. they provide generic data access for different applications in order to pass information between computing nodes and to save computation results persistently. the performance of distributedapplications depends on data-consistency protocols and meta-data management, but these factors of influence are often statically configured in distributed file-systems. In this paper, we describe EFS, an in-memory file-system that manages meta-data and consistency by flexibly adapting to file-access patterns.
A new secret-sharing-based e-auction scheme is proposed. distributed bid opening is employed to protect bid privacy. It can achieve all the desired properties for sealed-bid auctions at a reasonable cost. Moreover, at...
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A new secret-sharing-based e-auction scheme is proposed. distributed bid opening is employed to protect bid privacy. It can achieve all the desired properties for sealed-bid auctions at a reasonable cost. Moreover, attacks existing in the current secret-sharing-based sealed-bid e-auction schemes are prevented in the new scheme. In addition, it does not need any trust assumption.
Data obtained from the scientific experiments are heterogeneous and distributed. they are stored in different file formats so it is difficult to be integrated, analyzed, processed and visualised. Scientific experiment...
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the two most recent PVSS (publicly verifiable secret sharing) schemes are illustrated to be vulnerable to a simple attack. Moreover, one of them has to deteriorate its efficiency greatly to meet practical security req...
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the two most recent PVSS (publicly verifiable secret sharing) schemes are illustrated to be vulnerable to a simple attack. Moreover, one of them has to deteriorate its efficiency greatly to meet practical security requirement. the attack makes the share holders to receive incorrect shares, which will lead secret reconstruction to mistake. the efficiency deterioration is so serious that no practical application can tolerate it. So the two most recent PVSS schemes actually cannot work reliably and efficiently as they claim.
Web services based SOA are dramatically speeding up the application development process. they also see it as a way to build applications and systems that are more adaptable. Web services are poised to have a dramatic ...
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the oil and gas industries have been great consumers of parallel and distributedcomputing systems, by frequently running technical applications with intensive processing of terabytes of data. By the emergence of clou...
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the oil and gas industries have been great consumers of parallel and distributedcomputing systems, by frequently running technical applications with intensive processing of terabytes of data. By the emergence of cloud computing which gives the opportunity to hire high-throughput computing resources with lower operational costs, such industries have started to adopt their technical applications to be executed on such high-performance commodity systems. In this paper, we first give an overview of forward/inverse Prestack Kirchhoff Time Migration (PKTM) algorithm, as one of the well-known seismic imaging algorithms. then we will explain our proposed approach to fit this algorithm for running on Google's MapReduce framework. Toward the end, we will analyse the relation between MapReduce-based PKTM completion time and the number of mappers/reducers on pseudo-distributed MapReduce mode.
Position information is vital for wireless sensor networks in many applications. In this paper, based on the barycentric coordinate system, we incorporate a term constrains sensors to remain the intrinsic structure re...
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Position information is vital for wireless sensor networks in many applications. In this paper, based on the barycentric coordinate system, we incorporate a term constrains sensors to remain the intrinsic structure revealed by range measurements between neighboring nodes into the STRESS function, which is the cost function optimized by the distributed weighted-multidimensional scaling algorithm (dwMDS). By minimizing the modified cost function, we derive a distributed localization algorithm called the Multidimensional Scaling and Barycentric Coordinates based distributed Localization Algorithm (MDS_BC_DLA). Experimental results on four different types of WSNs show MDS_BC_DLA outperforms dwMDS.
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