This paper proposes a new topology optimization method, which can adjust the geometrical complexity of optimal configurations, using the level set method and incorporating a fictitious interface energy derived from the phase field method. First, a topology optimization problem is formulated based on the level set method, and the method of regularizing the optimization problem by introducing fic...

optimization of maintenance resources to maximize the system availability is a major concern in different manufacturing systems. therefore, a lot of effort is put to construct optimization models to reach the maximum availability level and to reduce the costs of lack of availability. however, despite these efforts, data uncertainty in the real world problems was neglected in proposed models whi...

A new optimization method is proposed in this paper for finding the firing angles in multi-level voltage source inverters to eliminate low-order selective harmonics and reduce total harmonic distortion (THD) value of the output voltage. For thid end, Fourier series is used for calculating objective function and selecting specific harmonics. Regarding the nature and complexity of the employed no...

QoS is of paramount importance for Web services to function. However, it is a challenging problem to construct services that meet user’s QoS expectation. This paper proposes an optimization method for service selection in constructing applications through service composition. In order to make quality rating accurate, ingredients of service reputation and expectation similarity are included in q...

This paper focuses on the utilization of local radial basis functions (LRBFs) based level set method (LSM) for topology optimization two-dimensional thermal problems using both concentrated as well uniformly distributed heat generation. The design domain is embedded implicitly into a higher-dimensional function, which parametrized with LRBFs through an explicit scheme. novel combination and LSM...

This paper proposes a new methodology for computing boundary sensitivities in level set topology optimization using the discrete adjoint method. The equations are constructed discretized governing field equations. objective function is differentiated with respect to point movement For this purpose, we present novel approach where perturb implicitly by locally modifying around given point. These...