NPC Multilevel Inverters Advanced Conversion Technology in APF.- Optimization Study of Hybrid Renewable Energy System in Autonomous Site.- Ensemble of Support Vector Methods to Estimate Global Solar Radiation In Algeria.- Study of percentage effect of Polymer blends system on physical properties using MM/QM approach.- Optimization and characterization of Nanowires Semiconductor based-Solar Cells.- Using Phase Change Materials (PCMs) to reduce energy consumption in buildings.- Optimization of Copper Indium Gallium Diselenide Thin Film Solar Cell (CIGS).