ABSTRACT In this study, we present a novel method for the topology optimization of irregular flow domain using parametric level set (PLSM). Some improvement was applied on CS-RBFs (radial basis functions with compact support)-based PLSM to make it suitable nonuniform mesh, expanding range field engineering application PLSM. The problem is solved by gradient-based algorithm Stokes equations as s...

the present study examined the role of social capital on financial performance of farming cooperatives in khouzestan province. the method of research was descriptive- correlative. the population consisted of 3273 members of farming cooperatives. based on cochran formula, 213 persons were selected. the survey was conducted using a questionnaire. content validity of the questionnaire was determin...

Abstract: In order to utilize hydrodynamic drag force on articulated robots moving in an underwater environment, an optimum motion planning procedure is proposed. The drag force acting on cylindrical underwater arms is modeled and a directional drag measure is defined as a quantitative measure of reaction force in a specific direction in a workspace. A repetitive trajectory planning method is f...

in this study, the effective factors on warpage in short fibre reinforced thermoplastic composites has been studied. first of all, the effective factors in manufacturing process were detected and then in order to decrease the number of experiments, the approach of design of experiments has been applied. by using micromechanics theory in composites and coefficients of thermal expansion models, a...

In this paper, we propose a novel method for ranking a set of fuzzy numbers. In this method a preference index is proposed based on $alpha$-optimistic values of a fuzzy number. We propose a new ranking method by adopting a level of credit in the ordering procedure. Then, we investigate some desirable properties of the proposed ranking method.