نتایج جستجو برای: switching
تعداد نتایج: 71873 فیلتر نتایج به سال:
Analysis and Simulation of ZVS Methods in Full Bridge Converters and Realization of a 3 KW Prototype
One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...
Analysis and Simulation of ZVS Methods in Full Bridge Converters and Realization of a 3 KW Prototype
One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...
In this paper, for the first time, the effect of the substrate doping of 22nm double-insulating UTBB silicon-on-insulator device on the switching performance and turn-on delay of the transistor is investigated. In UTBB devices, the substrate voltage is varied from positive to zero then negative voltages to trade-off transistor speed against the leakage current. Various circuit design procedures...
This study attempted to investigate the impact of teacher’s code-switching on the acquisition of a problematic grammatical structure, namely, object relative clauses, by intermediate EFL learners. Moreover, a secondary objective of the study was to determine the EFL learners’ attitudes and opinions regarding the effectiveness of teacher’s code-switching in their learning of a specific aspect of...
Introduction: If the patients are not satisfied with the hospital, this results in switching behavior of patients. In this situation, among different hospitals, the patients choose the hospital with higher level of service quality. So, the main aim of this paper is investigating the effect of hospital's service quality on switching behavior of inpatients in Shahid Sadoughi Hospital of Yazd. ...
This paper investigates the asymmetric effects of monetary policy on economic growth over business cycles in Iran. Estimating the models using the Hamilton (1989) Markov-switching model and by employing the data for 1960-2012, the results well identify two regimes characterized as expansion and recession. Moreover, the results show that an expansionary monetary policy has a positive and statist...
In this article, a new approach is proposed to design robust switching gain-scheduled dynamic output feedback control for switched uncertain continuous-time linear parameter varying (LPV) systems. The proposed robust switching gain-scheduled controllers are robustly designed so that the stability and H2-gain performance of the switched closed-loop uncertain LPV system can be guaranteed even und...
maintaining customer interest to repurchase is an important issue in today's competitive market of italian restaurants in tehran. therefore, determining the reasons that caused switching intention in customers, can be leading to arrange marketing purposes. so this research intends to evaluate effect of perceived quality, satiation and satisfaction on switching intention and to examine mode...
In this paper, a new bidirectional buck-boost dc-dc converter with capability of soft switching and zero input current ripple is proposed. The coupled inductor is used in the proposed converter to eliminate the input current ripple. In the proposed converter, zero voltage switching (ZVS) and zero current switching (ZCS) can be obtained for the main and auxiliary switches, respectively. In addit...
This paper proposes a switching adaptive control for trajectory tracking of unmanned aircraft systems. The switching adaptive control method is designed to overcome the wind disturbance and achieve a proper tracking performance for control systems. In the suggested system, the wind disturbance is regarded as a finite set of uncertainties; a controller is designed for each uncertainty, and a per...
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