In this paper an adaptive PID controller for Wind Energy Conversion Systems (WECS) has been developed. Theadaptation technique applied to this controller is based on Reinforcement Learning (RL) theory. Nonlinearcharacteristics of wind variations as plant input, wind turbine structure and generator operational behaviordemand for high quality adaptive controller to ensure both robust stability an...

This paper proposes an efficient Tracking method for velocity control of an electro-hydraulic servo system (EHSS) in the presence of flow nonlinearities and internal friction. The tracking method controller is a kind of feedback error learning structure. In the proposed method, the Feedback Error Learning (FEL) algorithm is used to control the velocity. There is no need to compute the system ja...

evaporation phenomena is a effective climate component on water resources management and has special importance in agriculture. in this paper, bayesian belief networks (bbns) as a non-linear modeling technique provide an evaporation estimation  method under uncertainty. as a case study, we estimated the surface water evaporation of the persian gulf and worked with a dataset of observations (dai...

the factor structure of the listening section of a persian language proficiency test (plpt), developed and used for academic purposes, was examined in this study. a structural equation modeling (sem) was employed using amos (v. 18) to analyze the responses of a number of persian language learners (n=120) who participated in the first piloting phase of the test in 2014. to examine whether the li...

this research aimed to study of the effects of classroom goal structures on students’ psychological wellbeing with respect to the mediating role of self-efficacy and basic psychological needs. in this regard, the effects of performance and mastery goal structure as exogenous variables with self-efficacy and basic psychological needs as mediating variables on wellbeing were tested through a hypo...