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Hosseinnia, Hamed,Farsadi, Murteza The Korean Institute of Electrical and Electronic 2017 Transactions on Electrical and Electronic Material Vol.18 No.6
Reconfiguration is an important method to minimize power loss and load interruption by creating an optimal configuration of a system. Furthermore, by increasing demand and value of consumption, construction of new power plants can be postponed in networks by reconfiguration and proper arrangement of linkage switches. This method is feasible for radial networks, which create meshes of linkage switches. One convenient way to achieve a system with minimal power loss and interruption is to utilize capacitors. Optimal placement and sizing of capacitors in such applications is an important issue in the literature. In this paper, cat swarm optimization is introduced as a new metaheuristic algorithm to achieve this purpose. Simulation has been carried out in two feasible networks, 69-bus and 33-bus systems.
Hamed Hosseinnia,Murteza Farsadi 한국전기전자재료학회 2017 Transactions on Electrical and Electronic Material Vol.18 No.6
Reconfiguration is an important method to minimize power loss and load interruption by creating an optimal configurationof a system. Furthermore, by increasing demand and value of consumption, construction of new power plants can bepostponed in networks by reconfiguration and proper arrangement of linkage switches. This method is feasible for radialnetworks, which create meshes of linkage switches. One convenient way to achieve a system with minimal power loss andinterruption is to utilize capacitors. Optimal placement and sizing of capacitors in such applications is an important issue inthe literature. In this paper, cat swarm optimization is introduced as a new metaheuristic algorithm to achieve this purpose. Simulation has been carried out in two feasible networks, 69-bus and 33-bus systems.
Emami, Seyed Ahmad,Asili, Javad,HosseinNia, Shima,Yazdian-Robati, Rezvan,Sahranavard, Mehrdad,Tayarani-Najaran, Zahra Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.no.sup3
Nepeta cataria L. has been used in traditional medicine of some countries. Here the cytotoxic and apoptogenic activity of methanol extracts, n-hexane, dichloromethane, ethyl acetate, n-butanol, and acqueous extracts and the essential oil obtained from the aerial parts of the plant were evaluated with PC3, DU-145 and MCF-7 cell lines. Cell viability, histograms of PI stained fragmented DNA in apoptotic cells and Western blot analysis of proteins involved in the cascade of apoptosis were compared in all samples. Thirty components were identified as volatile, representing 99.7% of essential oil composition after GC-MS analysis of the oil obtained from aerial parts of the N. cataria by hydro-distillation. The major oil components of the essential oil were nepetalactone stereoisomers. Comparing IC50 values showed estrogen receptor positive PC3 cells were more sensitive to the cytotoxic effects of N. cataria in comparison with low hormone-receptor presenting DU-145 cells. Among multiple extracts and essential oils of the plant, only the ethyl acetate extract could significantly decrease cell viability in PC3 cells, in a concentration dependent manner. Ethyl acetate extract of N. cataria treated cells showed a sub-G1 peak in PC3 cells in a concentration dependent manner that indicates the involvement of an apoptotic process in ethyl acetate extract-induced cell death. Western blotting analysis showed that in PC3 cells treated with ethyl acetate (48 h) caspase 3 and PARP were cleaved to active forms. Overall, the results suggest that further analytical elucidation of N. cataria in respect to finding new cytotoxic chemicals with anti-tumor activity is warranted.
Adaptive Reliable H∞ Control of Uncertain Affine Nonlinear Systems
Ali Abootalebi,Farid Sheikholeslam,Saeed Hosseinnia 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.6
For general input affine nonlinear systems, robust reliable control designs are commonly available that compensate the actuator faults in pure outage mode. In this paper, a more general and complex problem is considered and an adaptive reliable H∞ controller is designed for a class of uncertain input affine nonlinear systems in the presence of actuators fault. The key element of the work is the introduction of a novel adaptive mechanism that estimates the faults which are modeled as an outage or loss of effectiveness and stabilizes the overall system. Incorporating with the parameter projection algorithm and the solution of Hamilton-Jacobi-Inequality (HJI), the proposed method combines adaptive reliable control and robust H∞ control techniques. A numerical approach is developed based on the Taylor series expansion for solving the HJI. Various simulation examples are given to illustrate the effectiveness of the proposed adaptive reliable H∞ control scheme over the conventional H∞ control and reliable H∞ control method.
Adaptive Robust H∞ Control of Time Delay Systems with Unknown Uncertainty Bounds
Mojtaba Hosseini Toodeshki,Javad Askari,Saeed Hosseinnia 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.1
The problem of adaptive robust H∞ control for uncertain systems with multiple delays is considered in this paper. The essential requirement for the uncertainties is that they satisfy matching conditions and are norm-bounded, but the bounds are not necessarily known. The objective is to design adaptive robust H∞ state-feedback controller such that the resulting closed-loop system is asymptotically stable and a prescribed H∞ performance level of the closed loop system for disturbance attenuation is guaranteed. To solve this problem, a new sufficient condition is presented in terms of a linear matrix inequality (LMI). The effectiveness of proposed method is verified by its application to an unstable system.
Adaptive Robust Control of Uncertain Systems with State and Input Delay
Mojtaba Hosseini Toodeshki,Javad Askari,Saeed Hosseinnia 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.6
In this paper, adaptive robust control of uncertain systems with multiple time delays in states and input is considered. It is assumed that the parameter uncertainties are time varying norm-bounded whose bounds are unknown but their functional properties are known. To overcome the effect of input delay on the closed loop system stability, new Lyapunov Krasovskii functional will be introduced. It is shown that the proposed adaptive robust controller guarantees globally uniformly exponentially convergence of all system solutions to a ball with any certain convergence rate. Moreover, if there is no disturbance in the system, asymptotic stability of the closed loop system will be established. The proposed design condition is formulated in terms of linear matrix inequality (LMI) which can be easily solved by LMI Toolbox in Matlab. Finally, an illustrative example is included to show the effec-tiveness of results developed in this paper.
Hajian, Masood,Soltani, Jafar,Markadeh, Gholamreza Arab,Hosseinnia, Saeed The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
Direct torque control (DTC) of induction machines (IM) is a well-known strategy of these drives control which has a fast dynamic and a good tracking response. In this paper a nonlinear DTC of speed sensorless IM drives is presented which is based on input-output feedback linearization control theory. The IM model includes iron losses using a speed dependent shunt resistance which is determined through some effective experiments. A stator flux vector is estimated through a simple integrator based on stator voltage equations in the stationary frame. A novel method is introduced for DC offset compensation which is a major problem of AC machines, especially at low speeds. Rotor speed is also determined using a rotor flux sliding-mode (SM) observer which is capable of rotor flux space vector and rotor speed simultaneous estimation. In addition, stator and rotor resistances are estimated using a simple but effective recursive least squares (RLS) method combined with the so-called SM observer. The proposed control idea is experimentally implemented in real time using a FPGA board synchronized with a personal computer (PC). Simulation and experimental results are presented to show the capability and validity of the proposed control method.
Unified Gauge-Tension Control in Cold Rolling Mills: A Robust Regulation Technique
Hamid Reza Koofigar,Farid Sheikholeslam,Saeed Hosseinnia 한국정밀공학회 2011 International Journal of Precision Engineering and Vol. No.
In this paper, the unified gauge-tension control problem is formulated by defining the exit strip thickness of stands and interstand tensions as controlled outputs. It is shown that cold rolling process can be described by a nominal model perturbed by an additive uncertainty. This model is used to design a robust tracking controller, based on H∞ control theory,to ensure robust stability and performance despite the perturbations. The controller is first designed for a wide class of uncertain time-delay MIMO systems and then applied to a typical cold rolling mill. The main contributions of the proposed method are (i) overcoming the interaction between tension stabilization and thickness control, (ii) considering time-delay caused by measurements, (iii) guaranteeing robustness against model uncertainties and external disturbances. The performance of the method is also demonstrated and discussed by various simulations.
Mojtaba Hosseini Toodeshki,Javad Askari,Saeed Hosseinnia 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The problem of adaptive robust control of un-certain linear systems with multiple time delays in the state variables is considered in this paper. The essential requirement for the parameter un-certainties is that they satisfy some matching con-ditions and are norm bounded, whose bounds are unknown. The objective is to design an adap-tive robust controller based on a new Lyapunov Krasov skii functional such that the closed loop system is a symptotically stable. The proposed de-sign condition is formulated interms of linear ma-trix in equality(LMI) which can be easily solved by LMI Tool box in Mat lab. Finally, a numerical example is included to illustrate the effectiveness of the derived controller.
Amaneh Salmani Rezazadeh,Hamid Reza Koofigar,Saeed Hosseinnia 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.11
This paper presents an adaptive-based fault detection and isolation scheme for a general class of robot manipulators, withcharacterizing the isolability conditions. The proposed algorithm consists of a nonlinear adaptive fault detection estimator and a bank offault isolation estimators to determine the types of faults, which may be incipient or abrupt, while the fault parameter function may betime-varying. To demonstrate its effectiveness, the method is applied to a two-link robot manipulator and the simulation results arepresented and discussed.