نتایج جستجو برای: data bases quary optimization
تعداد نتایج: 2714340 فیلتر نتایج به سال:
Evolutionary Optimization is becoming omnipresent technique in almost every process of intelligent system design. Just to name few, engineering, control, economics and forecasting are some of the scientific fields that take advantage of an evolutionary computational process that aid in engineering systems with intelligent behavior. This special issue of Journal of Universal Computer Science is ...
Given a ‘dictionary’ D = {dk} of vectors dk, we seek to represent a signal S as a linear combination S = ∑ k γ(k)dk, with scalar coefficients γ(k). In particular, we aim for the sparsest representation possible. In general, this requires a combinatorial optimization process. Previous work considered the special case where D is an overcomplete system consisting of exactly two orthobases, and has...
This project has three goals. First, we support interoperable query processing among multiple heterogeneous sources. Heterogeneity arises due to the existence of diierent data models, schema and query languages. For an initial query posed w.r.t. a schema and query language, we produce mediated (transformed) queries w.r.t. other schema/query languages. The second goal is to modify traditional qu...
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