نتایج جستجو برای: شوکران باغی physospermum cornubiense l dc
تعداد نتایج: 671060 فیلتر نتایج به سال:
In this paper a complete robust control synthesis is performed for a hybrid power generation structure composed by a Fuel Cell and a Supercapacitor. The control strategies are applied to the DC-DC boost power converters associated to each power source. Multivariable PI control withH∞ performance,H∞ full and reduced order controllers are designed and compared. The multivariable PI controller is ...
This paper presents the basic characteristics of the digitally controlled boost type dc-dc converter. The static and dynamic characteristics of the dc-dc converter with the digital PID control are discussed. Especially, it is examined that the A-D conversion timing and anti-aliasing filter’s cut-off frequency affect the dynamic and static characteristics. As a result, when the anti-aliasing fil...
A novel high step-up DC-DC converter with coupled-inductor and switched-capacitor techniques is proposed in this paper. The capacitors are charged in parallel and are discharged in series by the coupled inductor, stacking on the output capacitor. Thus, the proposed converter can achieve high step-up voltage gain with appropriate duty ratio. Besides, the voltage spike on the main switch can be c...
This paper proposes dynamic clustering for coverage-time maximization (DC-CTM) in sensor networks. The coverage-time is defined as the time until one of cluster heads (CHs) runs out of energy in clustering-based sensor networks. DC-CTM regulates cluster radii for balanced energy consumption among CHs for coverage-time maximization. By using DC-CTM, three advantages can be achieved. The first on...
This paper presents an off-line integrated full ballast to supply a 35 W assembly of Power LEDs. The proposed solution integrates an input PFC stage (a flyback converter operating in DCM) and a DC-DC output converter (a buck converter) into a single switch power stage, operating with peak current control. As it will be shown, this control scheme maintains the current through the load constant, ...
Impaired regulation of blood glucose levels in diabetes mellitus (DM) patients and the associated elevation of blood glucose levels are known to increase the risk of diabetic cardiomyopathy (DC). In the present study, a probiotic bacterium, Lactobacillus reuteri GMN-32, was evaluated for its potential to reduce blood glucose levels and to provide protection against DC risks in streptozotocin (S...
(1) "Standard Methods for the Examination of Water and Wastewater", 13th ed., American Public Health Association, Washington, DC, 1971, p 339. (2) "Methods for Chemical Analysis of Water and Wastes", U.S. Environmental Protection Agency, Washington, DC, 1974, p 157. (3) L. K . Wang, J. Am. Water Works Assoc., 67 (1). 19-21 (1975). (4) L. K . Wang, W. W. Shuster. and P. J. Panzardi, J. Am. Water...
مقدمه گیاهی دارویی و معطر از خانواده نعناعیان است که در مناطق مختلف Thymus vulgaris L. : آویشن باغی با نام علمی ایران کشت می شود. هدف: بررسی تأثیر محلول پاشی متانول و اتانول بر عملکرد ماده خشک و فیتوشیمیایی گیاه آویشن باغی. روش بررسی: این آزمایش در قالب طرح بلوک های کامل تصادفی در 11 تیمار و 3 تکرار در مزرعه تحقیقاتی پژوهشکده ،30 ، گیاهان دارویی جهاد دانشگاهی انجام شد. تیمارها شامل تیمار شا...
Procedures Performed with UPPP Table 1. Demographic trends of admission for UPPP in the NIS 2006, N=6857 Uvulopalatopharyngoplasty: National Trends and Outcomes Shankar K Sridhara, MD (1); Lina Lander, ScD (2); Elie E Rebiez, MD (3); Rahul K Shah, MD (4) (1) Otolaryngology Head & Neck Surgery, National Capital Consortium, Washington, DC (2) Epidemiology, University of Nebraska Medical Center Co...
نتایج نشان داد که کاربرد نیتروژن سبب افزایش وزن تر و خشک، غلظت نیتروژن در اندام هوایی و عملکرد اسانس (1% p<) شده و بر شاخص درصد اسانس (5% p<) اثر معنی دار دارد. در این آزمایش با افزایش سطوح نیتروژن، وزن تر و خشک اندام هوایی افزایش یافت، به طوری که بیشترین وزن تر و خشک (به ترتیب با مقادیر 196 و 48/88 گرم در بوته) در تیمار 150 کیلوگرم در هکتار نیتروژن حاصل شد. همچنین با افزایش سطوح نیتروژن، غلظت ...
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