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Static Index Pruning is a performance optimization technique for search engines that attempts to identify and remove index postings that are unlikely to lead to top results for typical user queries. The goal is to obtain a much smaller inverted index that can quickly return results that are (almost) as good as those for the unpruned index. We make two contributions: First, we improve on previous results...
A WSN tends to be autonomic, an adaptive and distributive algorithm in Wireless Sensor Network is presented based on cellular automata mechanism, which was sourced from the thoughts of automatic breeding in biology. Each node of the Wireless Sensor Network is assumed to be equipped with CA machine, and change its state (active/stand-by) depends on the state of its neighbors. The main objective of...
In the paper by Shiyong Yang et al. , a closed-form power allocation scheme of weighted rate sum maximization in Gaussian broadcast channel was given. Their scheme is indeed optimal, but there are some critical defects in their proof for the optimality. In this paper, we first analyze the defects in their proof and then present a new proof for the optimality of their scheme.
There are various approaches for QoS-based web service composition. However, most of them are concerned about the algorithms of service compositions while ignoring the flexibility and expressiveness of users to set QoS constraints. Most of them assume that users could specify accurate QoS constraints easily. In reality, it is often not true especially for non-expert users. Users may not know the exact...
Based on the analysis of building energy efficiency features, considering the construction of energy efficiency factors, this paper AHP establish a comprehensive evaluation of building energy efficiency design model based on grey theory. This model mainly combines quantitative analysis, qualitative and quantitative analysis methods to overcome the evaluation's the subjectivity and arbitrariness, and...
Current QoS-aware automatic service composition queries over a network of Web services are often one-time innature. After a network of Web services is built, such queries are issued once, and answers are found from the scratch. The underlying assumption is that the participating Web services are rather static so that their functional and non-functional parameters seldom change. However, such an assumption...
With the proliferation of Web services, service engineers demand good automatic service composition algorithms that not only synthesize the correct work plans from thousands of services but also satisfy the quality requirements of the users. Our observation is that conventional approaches suffer from serious limitations in scalability and accuracy when addressing both requirements simultaneously....
The characteristics of Bragg wavelength movement in the core-etched process of fiber Bragg grating (FBG) are theoretically calculated and analyzed under several different conditions. The numerical analysis shows that, the Bragg wavelength decreases non-linearly and more and more faster as the decrease in core diameter, furthermore, the decreasing speed and decreasing degree in Bragg wavelength are...
As a kind of new financing way, it is necessary to carry on comprehensive appraisal to the earlier stage investment feasibility of power grid financial lease. This paper set up the comprehensive evaluation index system of project feasibility from the investment environment, the credit of renter, financial affairs of the project The classical and limited matter-elements of the investment feasibility...
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