نتایج جستجو برای: zcs

تعداد نتایج: 280  

2009
Dakshina Murthy Marian K. Kazimierczuk

Zero-current (ZC) switching pulse-widthmodulated (PWM) flyback DC-DC converter is an extended version of the single switch flyback converter with an additional active circuit. The purpose of the active circuit is to turn-off the main switch with zero-current switching (ZCS) condition to reduce the turn-off switching loss. This paper presents an overview of the ZCS flyback PWM DCDC converters. T...

2017
Tarun K. Mittal Alison Pottle Ed Nicol Mahmoud Barbir Ben Ariff Saeed Mirsadraee Michael Dubowitz Diana A. Gorog Piers Clifford Soroosh Firoozan Robert Smith Simon Dubrey Harmeet Chana Jaymin Shah Nigel Stephens Christopher Travill Andrew Kelion Mini Pakkal Adam Timmis

Aims CT calcium scoring (CTCS) and CT cardiac angiography (CTCA) are widely used in patients with stable chest pain to exclude significant coronary artery disease (CAD). We aimed to resolve uncertainty about the prevalence of obstructive coronary artery disease and long-term outcomes in patients with a zero-calcium score (ZCS). Methods and results Consecutive patients with stable cardiac symp...

2001
Andy Tomlinson Larry Bull

XCS and later ZCS are considered as adaptive intelligent controllers for road traffic networks. A simple traffic network simulator is employed and results are presented showing that within this environment both classifier system models are capable of learning reasonable policies. It is concluded that for reasons discussed, ZCS may be the more suitable system for this class of problem. Initial t...

1998
Carlos A. Canesin

This paper presents a new family of pulsewidthmodulated (PWM) converters, featuring soft commutation of the semiconductors at zero current (ZC) in the transistors and zero voltage (ZV) in the rectifiers. Besides operating at constant frequency and with reduced commutation losses, these new converters have output characteristics similar to the hard-switchingPWM counterpart, which means that ther...

Journal: :Evolutionary Computation 1994
Stewart W. Wilson

A basic classifier system, ZCS, is presented which keeps much of Holland’s original framework but simplifies it to increase understandability and performance. ZCS’s relation to Q-learning is brought out, and their performances compared in environments of two difficulty levels. Extensions to ZCS are proposed for temporary memory, better action selection, more efficient use of the genetic algorit...

Journal: :IEEJ Transactions on Industry Applications 1995

Journal: :Development 2007
Victoria G Ramsey Jason M Doherty Christopher C Chen Thaddeus S Stappenbeck Stephen F Konieczny Jason C Mills

Continuous regeneration of digestive enzyme (zymogen)-secreting chief cells is a normal aspect of stomach function that is disrupted in precancerous lesions (e.g. metaplasias, chronic atrophy). The cellular and genetic pathways that underlie zymogenic cell (ZC) differentiation are poorly understood. Here, we describe a gene expression analysis of laser capture microdissection purified gastric c...

2018
Stephanie M Topp Anjali Sharma Clement N Moonga Chisele Chileshe George Magwende German Henostroza

Introduction In 2013, the Zambian Correctional Service (ZCS) partnered with the Centre for Infectious Disease Research in Zambia on the Zambian Prisons Health System Strengthening project, seeking to tackle structural, organisational and cultural weaknesses within the prison health system. We present findings from a nested evaluation of the project impact on high, mid-level and facility-level h...

2017
Thomas C Harmon Uri Magaram David L McLean Indira M Raman

To study cerebellar activity during learning, we made whole-cell recordings from larval zebrafish Purkinje cells while monitoring fictive swimming during associative conditioning. Fish learned to swim in response to visual stimulation preceding tactile stimulation of the tail. Learning was abolished by cerebellar ablation. All Purkinje cells showed task-related activity. Based on how many compl...

2012
Narottam Chand

Wireless sensor networks (WSNs) have gained tremendous attention in recent years due to their numerous applications. Due to the limited energy resource, energy efficient operation of sensor nodes is a key issue in wireless sensor networks. Cooperative caching which ensures sharing of data among various nodes reduces the number of communications over the wireless channels and thus enhances the o...

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