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Properties of Semijoin Sequences 认领 引用
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作者 BengC.Ooi B.Srinivasan 《Journal of Computer Science & Technology》 SCIE 1989年第2期106-115,共10页
The problem of finding optimum semijoin sequ4ence of an arbitrary query under linear cost function for the transmission cost is NP.hard.Hence heuristic algorithms with desirable properties are explored.In this paper f... The problem of finding optimum semijoin sequ4ence of an arbitrary query under linear cost function for the transmission cost is NP.hard.Hence heuristic algorithms with desirable properties are explored.In this paper four properties of semijoin programs for distributed query processing are identified,The use of these properties in constructing semijoin sequence is justified.An existing algorithm is modified incorporating these properties.Empirical comparison with existing algorithms shows the superiority of the proposed algorithm. 展开更多
关键词 分布式数据库系统 数据处理 数据查询
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Competition Based Neural Networks for Assignment Problems 认领 引用
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作者 李涛 LuyuanFang 《Journal of Computer Science & Technology》 SCIE EI 1991年第4期305-315,共11页
Competition based neural networks have been used to solve the generalized assignment problem andthe quadratic assignment problem.Both problems are very difficult and are ε approximation complete.Theneural network app... Competition based neural networks have been used to solve the generalized assignment problem andthe quadratic assignment problem.Both problems are very difficult and are ε approximation complete.Theneural network approach has yielded highly competitive performance and good performance for thequadratic assignment problem.These neural networks are guaranteed to produce feasible solutions. 展开更多
关键词 Pro Competition Based Neural Networks for Assignment Problems
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