Entity

Time filter

Source Type


Shaker H.R.,Aalesund University College | Shaker F.,Islamic Azad University at Kazeroon
Journal of Process Control | Year: 2014

An appropriate control configuration selection is identified as one of the key prerequisites for attaining the control objectives in industrial practices. To select a suitable control configuration, it is important to determine which variables should be measured and how the process should be actuated. Therefore, the first step is to determine the optimal locations for the sensors and actuators. For the multivariable processes, this step is followed by choosing the appropriate input and output pairs for the design of SISO (or block) controllers. This is due to the popularity of the distributed and decentralized control in industrial control systems. These issues, which have been studied extensively for deterministic systems, have not been closely studied for stochastic systems. In this paper however the problem of control configuration selection is studied for the linear stochastic systems. The problem of selecting the sensor locations for stochastic systems is viewed as the problem of maximizing the output energy generated by a given state and for the actuator locations is viewed as the problem of minimizing the input energy required to reach a given state. Furthermore, a gramian-based interaction measure for control structure selection of multivariable stochastic systems is proposed. This interaction measure can be used to propose a richer (sparse or block diagonal) controller structure for distributed and partially decentralized control. © 2013 Elsevier Ltd.


Hashemi Z.,Islamic Azad University at Kazeroon
Proceedings of the 9th WSEAS International Conference on Applications of Electrical Engineering, AEE '10 | Year: 2010

A solution for high power, high voltage converter is multi-level cascade converter. In this paper a five-level cascade converter is simulated. To reduce the switching losses a soft-switching technique named auxiliary resonant commutated pole (ARCP) is utilized. The effects of non-ideal factors are analyzed and simulated and based on the simulation results the guideline for designing is introduced.


Derakhshanfar A.,Shahid Bahonar University of Kerman | Mozaffari A.A.,Shahid Bahonar University of Kerman | Zadeh A.M.,Islamic Azad University at Kazeroon
Research Journal of Parasitology | Year: 2010

Trypanosoma evansi is the cause of trypanosomiasis (Surra) which multiplies in the blood and body fluids of camel. Based on author knowledge, outbreak of trypanosomiasis has not been reported in Iran yet. Camels in Southern Fars province of Iran, suffering from mortalities and abortions, were examined clinically. Blood samples were prepared from affected camels. Haematologic indices were measured. Dead camels and aborted fetuses were necropsied and macroscopic findings were recorded. Sick animals were treated by Quinapyrmine sulfate (quinaject). Clinical signs such as weakness, lethargy, tachycardia, fever, pale mucosa, subcutaneous edema in brisket and eyelids, nasal and ocular discharges and weight loss were observed. Here we describe an outbreak of trypanosomiasis in South of Fars province of Iran. © 2010 Academic Journals Inc.


Sarkaki A.,Ahvaz Jundishapur University of Medical Sciences | Rezaiei M.,Islamic Azad University at Kazeroon | Gharibnaseri M.K.,Ahvaz Jundishapur University of Medical Sciences | Rafieirad M.,Islamic Azad University at Izeh
Malaysian Journal of Medical Sciences | Year: 2013

Background: This study aimed to evaluate the effect of two weeks oral administration of pomegranate seed extract (PGSE) on active and passive avoidance memories after permanent bilateral common carotid artery occlusion (2CCAO) to induce permanent cerebral ischemia in adult female rats. Methods: Seventy adult female Wistar rats (250 ± 20 g) were used. Animals were divided randomly into seven groups with 10 in each: 1) Sham-operated; 2) Ischemic; 3-6) Ischemic received PGSE (100, 200, 400 and 800 mg/2mL/kg, p.o.) for 14 days; 7) Ischemic received vehicle. In order to create 2CCAO, carotid arteries were ligatured and then cut bilaterally. Active and passive avoidance task were measured using criterion condition responses (CCRs) in Y-maze and step-through latency (STL) in two-way shuttle box in all female rats. Results: Both active and passive avoidance memories were significantly impaired in rats after CHI (P < 0.001). PGSE treatment significantly improved passive and active memory impairments with 2CCAO (P < 0.05, P < 0.01 and P < 0.001). No toxicity was observed even with high-dose PGSE consumption (800 mg/kg, for 14 days). Conclusion: PGSE exhibits therapeutic potential for avoidance memories, which is most likely related at least in part to its antioxidative and free radical scavenging actions. © Penerbit Universiti Sains Malaysia, 2013.


Sagheb M.M.,Islamic Azad University at Kazeroon | Azarpira N.,Shiraz University of Medical Sciences | Yaghobi R.,Shiraz University of Medical Sciences
International Journal of Endocrinology and Metabolism | Year: 2014

Background: Leptin and adiponectin are the two key metabolic hormones secreted from adipocytes to control food intake and energy expenditure. The action of both hormones in regulation of Gonadotropin Releasing Hormone (GnRH) secretion from the hypothalamus is mediated through Kisspeptins. Kisspeptins are products of KiSS-1 gene. Leptin and adiponectin are modulators of KiSS-1 expression in the hypothalamus. These peptides have also important roles in pancreatic β-cells to control insulin synthesis and secretion and their receptors are detected in Langerhans islets. We hypothesized that leptin and adiponectin might alter KiSS-1 and Kiss Receptor mRNA expression in the islets. Objectives: The aim of this study is to investigate any modulatory effect that leptin and adiponectin may have on the expression of Kiss-1 and KiSSR gene in Langerhans islets. Materials and Methods: We isolated the islets from adult male rats by collagenase and cultured CRI-D2 cell lines to investigate the effect of leptin and adiponectin. Then, we incubated them with different concentrations of leptin and adiponectin for 24 hours. After that, RNA was extracted from the islets and CRI-D2 cells and transcripted to cDNA. KiSS-1 and KissR expression levels were evaluated by real time PCR. Results: In islet and CRI-D2 cells, leptin increased the KiSS-1 mRNA expression significantly, but adiponectin decreased it was expected. Conclusions: These findings indicated the possibility that KiSS-1 mRNA expression is a mediator of leptin and adiponectin function in the islets. © 2014, Research Institute For Endocrine Sciences and Iran Endocrine Society.

Discover hidden collaborations