the aim of this work is to investigate the variational discretization and mixed finite element methods for optimal control problem governed by semi linear parabolic equations with integral constraint. the state and co-state are approximated by the lowest order raviart-thomas mixed finite element spaces and the control is not discreted. optimal error estimates in l2 are established for the state...

this paper considers a two-stage assembly flow shop problem (tafsp) where m machines are in the first stage and an assembly machine is in the second stage. the objective is to minimize a weighted sum of earliness and tardiness time for n available jobs. jit seeks to identify and eliminate waste components including over production, waiting time, transportation, inventory, movement and defective...

The formation of patterns is one the main stages in logical data analysis. Fuzzy approaches to pattern generation analysis allow cover not only objects target class, but also a certain proportion opposite class. In this case, search an optimization problem with maximum coverage class as objective function, and some allowed constraint. We propose more flexible symmetric model which does impose s...

This paper proposes a method for optimising the hull form of ocean-going trawlers to decrease resistance and consequently reduce energy consumption. The entire optimisation process was managed by integration computer-aided design computational fluid dynamics (CFD) in CAESES software. Resistance simulated using CFD solver STAR-CCM+. trawler investigated under two main navigation conditions: traw...