List of Articles hybrid system Open Access Article Abstract Page Full-Text 1 - Determining the appropriate mixture of renewable energy sources in order to reduce uncertainty Amir Ghaedi Open Access Article Abstract Page Full-Text 2 - Optimization of Stand-alone Hybrid PV/Wind/Fuel-Cell System Considering Reliability Indices Using Cuckoo Optimization and Firefly Algorithm Mehdi Rezaei محمود قنبری Open Access Article Abstract Page Full-Text 3 - Optimal Design of a Hybrid Solar–Wind–Battery System using the Grasshopper Optimization Algorithm for Minimization of the Loss of Power Supply Probability Ronak Jahanshahi Bavandpour Hamid Ghadiri Hamed Khodadadi Open Access Article Abstract Page Full-Text 4 - Robust Planning of the Islanded Hybrid System Including Renewable and Non-Renewable Sources and Stationary and Mobile Storages Farshad Khalafian Open Access Article Abstract Page Full-Text 5 - Economic Design of Renewable Hybrid System Based on Hydrogen and Thermal Storages Considering Electrical and Thermal Energy Management Reza Sepahvand Akbar Asgharzadeh bonab Open Access Article Abstract Page Full-Text 6 - Novel Approach for Optimal Sizing of Stand-alone Hybrid Photovoltaic/Wind Systems Zakieh Tolooi Hadi Zayandehroodi Alimorad Khajehzadeh