نتایج جستجو برای: speed factor
تعداد نتایج: 1038602 فیلتر نتایج به سال:
Abstract Accurate gust forecasts can reduce potential threats to people's lives and properties, but we need more reliable forecasting methods models. A recent development is the meteorologically stratified factor (MSGF) model, which accurate in gusts than previous model. The regional terrain underlying surface both have crucial effects on factor. We therefore combined observations from China Me...
Neuropsychological abilities have found to explain a large proportion of variance in objective measures of walking gait that predict both dementia and falling within the elderly. However, to this date there has been little research on the interplay between changes in these neuropsychological processes and walking gait overtime. To our knowledge, the present study is the first to investigate int...
the necessity to use pesticides in agriculture, provides environmental pollution at the same time, and significant part of the agri-economy is allocated to this reseon. therefore, it is important issues to use of pesticides, with the highest degree of effectiveness and minimal loss. in this study, electrostatic spraying and its functional factors were evaluated. the applied experimental design ...
OBJECTIVE The Penn Computerized Neurocognitive Battery (CNB) was designed to measure performance accuracy and speed on specific neurobehavioral domains using tests that were previously validated with functional neuroimaging. The goal of the present study was to evaluate the neuropsychological theory used to construct the CNB by confirming the factor structure of the tests composing it. METHOD...
In this paper, a new method is proposed for the speed control of a three-phase current forced synchronous machine drive. This metohd is based on the use of an approximate constant commutation safety margin angle in the output thyristor bridge of the drive system as well as on the compenastion of stator magnetization reaction. The commutation process in the output converter of the machine driv...
In this paper, an analytical method based on Modified Slab Method of analysis is presented to study the asymmetrical rolling process due to difference in work rolls radii, rolls speeds and interface frictions. The shear force imposed on material along the contact region is considered to be a function of the frictional factor and the roll gap geometry. Elastic-plastic with linear work hardening ...
The main aim of this paper is to study the material removal phenomenon using the finite element method (FEM) analysis for orthogonal cutting, and the impact of cutting speed variation on the chip formation, stress and plastic deformation. We have explored different constitutive models describing the tool-workpiece interaction. The Johnson-Cook constitutive model with damage initiation and damag...
each year, millions of liters of toxic liquid, are used to combat with pests and plant diseases in farms. the wide spread use of chemical pesticides causes great environmental hazards. particles drift is one of the main problems in spraying which results in the contamination of farm lands, humans and animals. management of particle size is regarded as the main factor in drift control. in this s...
Article history: Received 11 October 2013 Received in revised form 27 January 2015 Accepted 1 May 2015 Available online xxxx It is unclear whether different elementary cognitive tasks (ECTs) are associated with intelligence because these tasks tap the same basic cognitive process (suggesting a single mental speed factor) or different ones (suggesting several mental speed factors), as it is not ...
The structure of phonological processing for typically developing children has been debated over the past two decades. Recent research has indicated that phonological processing is best explained by a single underlying phonological ability (e.g., Anthony and Lonigan, 2004). The current study had two goals. The first goal was to determine the structure of phonological processing for school-age c...
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