Organizing a racing event is not an easy task. Organizing a racing event that spans across multiple days and whose participants have to run (on foot) for 100 miles is even harder. In such events many checkpoints are n...
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With the development of Web search engines, it is considered as an important task to provide retrieved documents in a proper manner. Many search engines have used various document ranking algorithms to provide their r...
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ISBN:
(纸本)9781450305716
With the development of Web search engines, it is considered as an important task to provide retrieved documents in a proper manner. Many search engines have used various document ranking algorithms to provide their retrieved documents in a more efficient way for users. However, even though a good algorithm is used, there are some limitations if they do not consider the characteristic of queries which is diverse depending on user intention or interest. Even if a user searches documents with the same query, he/she may want a different result depending on when he/she queries into a search engine. How can a search engine judge what way is more efficient to provide retrieved results? We suggest a simple and novel way which employs query-related Web context to answer this question. With the distribution of query-related tweets and news articles, we classify whether a query would be considered as a hot query or a cold query. And then, we extract major topic terms from the hot time slice if a query is classified as a hot query, or extract refined contents if a query is classified as a cold query. Finally, all retrieved results are re-ranked by reflecting these topic terms or refined contents according to the characteristic of the query. To show the meaningfulness of our approach, we compare our re-ranked results with original retrieved results from the commercial search engine. Copyright 2011 ACM.
This paper considers the socio-economic world context in 2009 and is aimed at achieving two goals: on one hand, to carry out an economic quantitative analysis of interdependence of the world markets;on the other hand,...
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This paper considers the socio-economic world context in 2009 and is aimed at achieving two goals: on one hand, to carry out an economic quantitative analysis of interdependence of the world markets;on the other hand, to investigate the relationship between economic growth and social well-being. In order to reach the first aim, we use, as a starting point, Wallerstein's World Systems Theory (1982) presenting a hierarchical but unfixed division of the world in three levels (core, semi-periphery and periphery);then we consider a group of 124 countries and assign each of these country to one of the three areas. The assignment has been realized by looking at the total score achieved by each country, with the addition of the partial scores based on the position occupied in three different rankings which consider three distinct economic indicators each of them has been divided by the population size (real GDP, exports and debt-external). Therefore we proceed by reaching our second goal concerning the examination of the nature of the relationship existing between the level of each country's participation in the world economy and its social well-being. We have decided to calculate the Physical Quality of Life Index (PQLI) in order to show the level of well-being gained by each country considered. The PQLI was created by M. D. Morris (1979) to satisfy the need of constructing new indexes to overcome the limitations of economic parameters for measuring human development, which were highlighted by the social indicators movement of the 1960s and by very important works produced by Amartya Sen (1985, 1987, 1999). The construction of PQLI for each country has given us the possibility of comparing the results of the first part of our work with those coming from the second part, in order to focus on the relationship between economic growth and well-being. The results obtained have further been underlined by using a selected group of 9 countries reflecting the main trends which char
Multi-threaded programming is gaining popularity as general purpose processors have evolved to multi-core platforms. This brings new challenges for software designers. In the early phases of multi-threaded application...
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Starting from semantic composition of services, acE service flow as architecture researching point, this paper has designed and argued dynamic flow evolution mechanism. First of all, the architecture service topology ...
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Recent large-scale hierarchical classification tasks typically have tens of thousands of classes as well as a large number of samples, for which the dominant solution is the top-down method due to computational comple...
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Synchronizing the access of concurrent threads to shared memory,in order to prevent unwanted interference is a basic problem in multithreaded *** synchronization mechanism provides a means of restricting the possible ...
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Synchronizing the access of concurrent threads to shared memory,in order to prevent unwanted interference is a basic problem in multithreaded *** synchronization mechanism provides a means of restricting the possible inter-leavings of threads,thereby reducing nondeterminacy and allowing stronger program properties to be *** example locks are often used around update operations on shared data to ensure mutual *** should be a language feature and a part of language *** core idea of this paper is that the compiler is made to identify the critical section in a multithreaded program for the synchronization,which currently is not a C language feature in gcc (GNU Compiler Collection) *** idea behind this technique is that compiler will automatically take care of the critical section by introducing Lock and Unlock function calls in a multithreaded program without involvement of the programmers.(A critical section of a multithreaded program is a section of code where shared data are accessed by the multiple threads.)
As the next generation of power systems,smart grid is a high degree integration of electric power,communication and automatic control.A safe,effective and intelligence communication platform is the precondition of bui...
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ISBN:
(纸本)9781612848334
As the next generation of power systems,smart grid is a high degree integration of electric power,communication and automatic control.A safe,effective and intelligence communication platform is the precondition of building Smart *** paper introduces an overview of power communication in nowadays,analyzes and probes the structure and safe strategy of communication network in Smart *** key technologies of communication safety in Smart grid are summarized and *** paper has important reference value to the research area of the communication safety of Smart grid.
Deployment of IP Multicast was hindered for many technical and marketing ***,various alternative proposals,of which Application Layer Multicast(ALM) and Overlay Multicast(OM) are the most promising,have been suggested...
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Deployment of IP Multicast was hindered for many technical and marketing ***,various alternative proposals,of which Application Layer Multicast(ALM) and Overlay Multicast(OM) are the most promising,have been suggested *** ALM and OM are much easier to deploy than IP multicast,there has been a rich literature on the design,implementation,and evaluation of various protocols for ALM and ***,to encourage the design and development of Internet multicast,we still face many *** issues for the future of Internet multicast remain *** paper presents a state of the art study on Internet multicast issues and solutions *** key aspects related to the topic are explored in order to point out the open research issues and to guide our ongoing research.
Through the careful comparison and analysis of rule changes in international sports aerobics between 2005-2008 and 2009-2012, the results show that adjustments have been made in art, completion, difficulty, venue and ...
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Through the careful comparison and analysis of rule changes in international sports aerobics between 2005-2008 and 2009-2012, the results show that adjustments have been made in art, completion, difficulty, venue and time for new rules, and the new cycle rules tend to be more standardized, detailed and rationalized, which guide the development of competitive aerobics in a wider range.
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