Fragmentation usually occurs when data space of original storage nodes has to be reallocated to new added storage nodes during the scale-out evolution of the large-scale storage *** greatly influences the performance ...
Fragmentation usually occurs when data space of original storage nodes has to be reallocated to new added storage nodes during the scale-out evolution of the large-scale storage *** greatly influences the performance of the large-scale storage *** this paper,we present an efficient space management framework,called newBalance,to reduce fragmentation with the minimum data movement while keeping the storage system load *** space management framework has two phases including the collection phase and the allocation *** the collection phase,we propose a novel algorithm,called the greedy bi-direction collector,which collects enough space for the new storage *** the allocation phase,we formally represent it as one variant of the bin packing problem and then utilize some bin packing heuristics including the first fitting and the best fitting to allocate collected intervals to new added storage *** experimental results show that the amount of intervals can be reduced by 20%~55%and our algorithmic optimization improves the data lookup performance by at least 10%and the scale-out performance by 2×~3×.
Most patch-based texture synthesis algorithms using Markov Random Field for composite materials only considers color similarity between the corresponding pixels. The traditional algorithms are lack of adaptability, so...
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Despite numerous efforts on blur measurement of partially blurred images, there still lacks an effective blur measure that is both pixel-wise and locally sharp consistent. The paper proposes a novel method with two co...
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In order to deal with serious security threats of SQL injection to Web applications, this paper proposes a novel SQL-injection detection method based on genetic algorithm (GA). A unified description for characteristic...
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The paper presents a mobile phone palmprint verification system based on novel image capture and feature extraction approaches. The system captures part regions of palm with four fingers closing together and parallel ...
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The paper presents a mobile phone palmprint verification system based on novel image capture and feature extraction approaches. The system captures part regions of palm with four fingers closing together and parallel to screen. Then ROI image can be located by detecting key points of fingers region. For feature extraction step, optimal Gabor features of different scales and orientations are extracted from ROI images, and then SDLPP is applied for the dimensionality reduction of Gabor feature space to provide a more compact and discriminant representation. The system achieves the verification accuracy of EER = 3.43% and takes less than 1s to verify a palmprint image, which can satisfy the requirement of a real-time verification system.
Search engines have become the main way for people to get expected information, most of them are based on keyword ***, keyword search is based on computing the similarity of letters of the keywords, instead of semanti...
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ISBN:
(纸本)9781479957286
Search engines have become the main way for people to get expected information, most of them are based on keyword ***, keyword search is based on computing the similarity of letters of the keywords, instead of semantic meaning, therefore the searching results often include irrelevant information to user *** paper aims to find a way on improving keyword search *** Wikipedia,which is the largest online encyclopedia, this paper explores the relations of terms through computing the semantic relatedness between words, and presents an algorithm called WLA in the light of link structure and text message in *** is more, we design a terms query platform through which users will be able to get all the meanings about the *** making a comparison with lexical database WordNet, it has demonstrated the feasibility on our methods.
The precise prediction of bus routes or the arrival time of buses for a traveler can enhance the quality of bus service. However, many social factors influence people's preferences for taking buses. These social f...
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