الفهرس 
Abstract
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Abstract
Heterogeneous grids are widely used to solve large-scale computational and data intensive problems in a short time and low cost because it enables running the application in parallel across a distributed set of grid-nodes instead of one large and expensive server. The performance of such applications is highly dependent tasks of an scheduling. Task scheduling is the problem of mapping the dependent tasks application into nodes of computational grid in order to obtain high performance application execution at low complexity.