نتایج جستجو برای: crossover trial

تعداد نتایج: 343534  

Journal: :international journal of information science and management 0
c. lucas ph.d. , center of excellence on control and intelligent processing, ece dept., university of tehran a. nayyeri m.s. , faculty of electrical and computer engineering, university of tehran m. yabandeh m.s. , faculty of electrical and computer engineering, university of tehran

real coded genetic algorithm, rcga, is the type of ga which operates on chromosomes with real valued parameters. different mutation and crossover operations are defined for rcga. one usable crossover for this kind of ga is to consider its chromosomes simply as bit strings and utilize the same operations as binary coded ga. in this paper, we attempt to show that this kind of crossover can not ha...

Journal: :the iranian journal of pharmaceutical research 0
sedighe bakhtiari associate professor of oral medicine department, dental school, shahid beheshti university of medical sciences, tehran, iran. jamile beigom taheri professor of oral medicine department, dental school, shahid beheshti university of medical sciences, tehran, iran. mahin bakhshi assistant professor of oral medicine department, dental school, shahid beheshti university of medical sciences, tehran, iran. hamed mortazavi assistant professor of oral medicine department, dental school, shahid beheshti university of medical sciences, tehran, iran. azadeh shah hoseini private dentist. elahe vahid dastjerdi associate professor of orthodontics department, dental school, shahid beheshti university of medical sciences, tehran, iran.

this study was designed to elucidate the effect of ascorbic acid on salivary total antioxidant capacity in smokers. in this single blind crossover clinical trial, the whole unstimulated saliva of 30 smokers, who were randomly divided into two groups, was collected. in the first phase after the saliva collection, one group of patients took 500 mg of vitamin c powder, for 3 weeks. then, saliva of...

Journal: :British medical journal 1985
G J Shuttleworth G V Mayho

Cadexomer iodine (Iodosorb) is a hydrophilic starch powder containing iodine, which is a suitable dressing for granulating wounds such as venous ulcers. A total of 61 outpatients with chronic venous ulcers participated in a randomised optional crossover trial using cadexomer iodine or a standard dressing for their ulcers. The trial lasted for 24 weeks or until the ulcer had healed. Two patients...

Journal: :international journal of preventive medicine 0
mohsen mazidi haleh rokni amir hossein sahebkar akram mohammadi majid ghayour‑mobarhan gordon a. ferns

background: hydroxymethylglutaryl‑coenzyme a reductase inhibitors (statins) are antihyperlipidemic drugs with an established efficacy in stabilizing atherosclerotic plaques and preventing atherogenesis and reducing cardiovascular events. the purpose of this study was to determine the effect of simvastatin on serum vitamin d status in dyslipidemic patients as vitamin d status has an impact on mo...

Journal: :International Journal of Robotics and Control Systems 2021

Proportional Integral Derivative (PID) controllers are used in general to control a system, for example DC motor system. The difficulty of using the controller is parameter tuning, because tuning parameters still use trial and error method find PID constants, namely Gain (KP), (KI) (KD). In this case, genetic algorithm which can give better results each iteration. Genetic algorithms one smart m...

Journal: :Brain : a journal of neurology 2009
Jean-Pascal Lefaucheur Xavier Drouot Patrick Cunin Rémy Bruckert Hélène Lepetit Alain Créange Pierre Wolkenstein Patrick Maison Yves Keravel Jean-Paul Nguyen

Epidural motor cortex stimulation (MCS) has been proposed as a treatment for chronic, drug-resistant neuropathic pain of various origins. Regarding pain syndromes due to peripheral nerve lesion, only case series have previously been reported. We present the results of the first randomized controlled trial using chronic MCS in this indication. Sixteen patients were included with pain origin as f...

Journal: :Journal of Marine Science and Engineering 2022

This paper presents a weight optimization method for nonlinear model predictive controller (NMPC) based on the genetic algorithm (GA) ship trajectory tracking. The coefficients Q and R of objective function in NMPC are obtained via real-time instead trial error method, which improves efficiency accuracy controller. In addition, targeted improvements made to internal crossover operator, mutation...

2015
Eleni Mantzari Gareth J. Hollands Rachel Pechey Susan Jebb Theresa M. Marteau

BACKGROUND Intake of free sugars in the population exceeds recommendations, with the largest source in the diet being sugar-sweetened beverages (SSBs). SSB consumption is linked to adverse health consequences and contributes to health inequalities, given greater consumption amongst the most deprived. One possible intervention is to reduce the available sizes of SSB packaging but there is an abs...

2015
N. Kriek JG Groeneweg DL Stronks FJPM Huygen

BACKGROUND Complex Regional Pain Syndrome (CRPS) is a disabling disease that is sometimes difficult to treat. Although spinal cord stimulation (SCS) can reduce pain in most patients with CRPS, some do not achieve the desired reduction in pain. Moreover, the pain reduction can diminish over time even after an initially successful period of SCS. Pain reduction can be regained by increasing the SC...

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