Alireza Mohammadi

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—Traditionally, the design of extremum seeking algorithm treats the system as essentially a black-box, which for many applications means disregarding known information about the model structure. In contrast to this approach, there have been recent examples where a known plant structure with uncertain parameters has been used in the online optimization of(More)
— Instability and poor performance are two well-known problems encountered in bilateral teleoperation over a communication channel with variable time delays, where force feedback from the slave side is provided to the master side. When unknown disturbances or external forces act on the master and/or the slave manipulators, the teleoperation system will be(More)
  • Jila Rezaeian Dalooei, Hedayat Sahraei, Gholam Hossein Meftahi, Maryam Khosravi, Zahra Bahari, Boshra Hatef +6 others
  • 2016
The current study investigated the effect of temporary inhibition of amygdala in response to metabolic changes caused by stress in female mice. Unilateral and bilateral amygdala cannulation was carried out, and after a week of recovery, 2% lidocaine hydrochloride was injected into the mice amygdalae five minutes before the induction of stress. A(More)
  • Alireza Mohammadi, Farnoosh Attari, Vahab Babapour, Seyedeh-Nafiseh Hassani, Najmehsadat Masoudi, Abdolhossein Shahverdi +1 other
  • 2015
OBJECTIVE Embryonic germ (EG) cells are the results of reprogramming primordial germ cells (PGC) in vitro. Studying these cells can be of benefit in determining the mechanism by which specialized cells acquire pluripotency. Therefore in the current study we have tried to derive rat EG cells with inhibition of transforming growth factor-β (TGFβ) and(More)
— This paper investigates the problem of direction following for planar snake robots. The control objective is to regulate the linear velocity vector of the snake robot to a constant reference while guaranteeing boundedness of the system states. The proposed feedback control strategy enforces virtual constraints encoding a lateral undulatory gait,(More)
This paper investigates a class of Lagrangian control systems with n degrees-of-freedom (DOF) and n − 1 actuators, assuming that n − 1 virtual holonomic constraints have been enforced via feedback, and a basic regularity condition holds. The reduced dynamics of such systems are described by a second-order unforced differential equation. We present necessary(More)