نتایج جستجو برای: ac

تعداد نتایج: 34612  

Journal: :IEEE Transactions on Power Electronics 2021

A novel single-phase pulsewidth modulation (PWM) direct ac-ac converter based on two-level nondifferential dual-buck ac chopper legs with inverting and noninverting operations is first proposed in this article. It has the ability to resolve both voltage sag swell problems at same time when used as distributed flexible conditioner. Compared traditional converter, it much enhanced system reliabil...

Journal: :The Biochemical journal 2005
Debora Steiner Tomer Avidor-Reiss Ester Schallmach Elena Butovsky Nirit Lev Zvi Vogel

We previously reported that acute agonist activation of G(i/o)-coupled receptors inhibits adenylate cyclase (AC) type VIII activity, whereas agonist withdrawal following chronic activation of these receptors induces AC-VIII superactivation. Three splice variants of AC-VIII have been identified, which are called AC-VIII-A, -B and -C (with AC-VIII-B missing the glycosylation domain and AC-VIII-C ...

A Feizizadeh, H Abdollahzadeh, M* Fazlzadeh, Sh Afshin, Y Rashtbari, Y* Poureshgh,

Background & objective: The presence of natural organic matter in water sources creates various problems, especially in common water treatment process. These compounds cause unfavorable taste and odor in water and are among the most important precursors of water disinfection by-products. This study was carried out to evaluate the efficiency of activated carbon (AC) and activated carbon modified...

1996
Bing Liu

Many general and specific arc consistency algorithms have been produced in the past for solving Constraint Satisfaction Problems (CSP). The important general algorithms are AC-3, AC-4, AC-5 and AC-6. AC-5 is also a generic algorithm. It can be reduced to AC-3, AC-4 and AC-6. Specific algorithms are efficient specializations of the general ones for specific constraints. Functional, anti-function...

احمد ساعتچی سعید شعبانی عباس آقاجانی کوپایی, محمد علی گلعذار کیوان رئیسی

هدف از این تحقیق بررسی اثرات جریان سرگردان AC بر سازه های بتنی است. در این بررسی  ولتاژهای 220 و 380 ولت  AC بر نمونه‌های مختلف بتنی اعمال شد و اثرات جریان سرگردان AC بر ساختار آنها به کمک آزمون های جریان-زمان، مقاومت ویژه، عمق نفوذ کلرید، مقدار بار الکتریکی عبوری در آزمون "اندازه‌گیری سریع نفوذپذیری در برابر کلرید" و آزمون طیف نگار امپدانس الکتروشیمیایی بررسی شد. بر اساس نتایج آزمون‌های انجام ...

In this study, Mesobuthus gibbosus and Mesobuthus eupeus eupeus venom samples were compared for lethality, in vivo effects and proteins. Neutralization capacity of monovalent Androctonus crassicauda antivenom (RSHA anti-Ac) was tested against the lethal effects of the venoms.Venom was obtained from mature scorpions by electrical stimulation of the telson. The lethality of the venom and potency ...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2016
Hyun Joon An Seongho Seo Hyejin Kang Hongyoon Choi Gi Jeong Cheon Han-Joon Kim Dong Soo Lee In Chan Song Yu Kyeong Kim Jae Sung Lee

UNLABELLED Inaccuracy in MR image-based attenuation correction (MR-AC) leads to errors in quantification and the misinterpretation of lesions in brain PET/MRI studies. To resolve this problem, we proposed an improved ultrashort echo time MR-AC method that was based on a multiphase level-set algorithm with main magnetic field (B0) inhomogeneity correction. We also assessed the feasibility of thi...

The idea of a microgrid is created by utilizing more diverse ac or dc distributed generation (DG) sources along with an energy storage system (ESS) and loads. The most efficient and reliable selection of ac and dc microgrids is a hybrid ac/dc microgrid. The hybrid microgrid largely overcomes the shortcomings of standalone ac or dc microgrids. A bidirectional interlinking converter (BIC) is util...

2011
William F. Sheridan

Eight Activator (Ac) transposable elements mapped to the maize chromosome arm 1S were assessed for Ac transposition rates. For each of the Ac stocks, plants homozygous for the single Ac element and the Ds reporter r1-sc:m3 on chromosome 10 were crossed as females by a homozygous r1-sc:m3 tester color-converted W22 line. The resulting ears produced mostly coarsely spotted kernels and a low frequ...

2013
Rasha S. M. Ali

Ac signals are accurately measured by using Thermal Converters (TCs). In this paper, ac voltages are automatically calibrated as an example by the Thermal Voltage Converter (TVC) with changing the sequence of the applied signals. 1 V, 10 V, and 100 V at different frequencies from 50 Hz to 100 kHz are measured. The three different sequences are sequence #1 which is (+dc, ac, -dc), sequence #2 wh...

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