A new approach to portable photo-voltaic systems which described in this paper is of very low power (5W) and main purpose is for recharging or powering small portable electronics devices. The objects of this study are: i) the optimization of photo-voltaic cells connection with regard to portable conditions; a nonstandard topology is adopted, to compensate shadowing or nonoptimal orientation; ii...

Topology optimization searches for an optimal distribution of material and void without any restrictions on the structure of the design geometry. Shape optimization tunes the shape of the geometry, while the topology is fixed. In this paper we proceed sequentially with the optimal topology and shape design so that a coarsely optimized topology is the initial guess for the following shape optimi...

In this paper the piecewise level set method is combined with phase field method to solve the shape and topology optimization problem. First, the optimization problem is formed based on piecewise constant level set method then is updated using the energy term of phase field equations. The resulting diffusion equation which updates the level set function and optimization ...

An integrated truss design methodology based on homogenization-based topology optimization is proposed. After performing continuum topology optimization to obtain the optimal structural configuration, in the case that the percentage usage of the materials is low, the methodology can automatically proceed to the truss optimization based on the model, and achieve the optimum truss structure meeti...

— To prevent from topology changes, failures, or overloads, network management requires frequently computation and reconfiguration of established connections. When the number of established connections in the network is very large, the optimization of the reconfiguration task is essential to have short latency. When the communications using these connections are real-time, traffic interruption ...

In this paper, a new structure for cascade multilevel inverter is presented which consists of a series connection of several sub-multilevel units. Each sub-multilevel unit comprises of eight unidirectional switches, two bidirectional switches, and six DC voltage sources. For the proposed cascade topology, two algorithms are presented to produce all possible levels at the output voltage waveform...

The National Mandarin Proficiency Test(NMPT) to be completed by computer-aided evaluation, not only can remove the human factor to establish uniform standards, but also save time, improve efficiency, accelerate the promotion and popularization of mandarin. In this paper, we focus on the optimization of artificial neural network by PSO for automatic grading the NMPT. A framework of the automatic...