نتایج جستجو برای: solid motor

تعداد نتایج: 347750  

Journal: :Journal of physics 2023

Abstract Burning surface calculation is an important item in solid rocket engine design. In order to accurately calculate the parameters such as burning change law combustion chamber, level set based method used for calculation, firstly, complex divided into a uniform grid by voxelization; then distance transformation signed function, and finally information of contour obtained generate curve. ...

Journal: :Journal of the Korean Society of Propulsion Engineers 2015

Journal: :IEEJ Transactions on Industry Applications 1995

2010
Saleh A. Al-Jufout Kamal A. Khandakji

This contribution describes a computational model of the solid-state variable-frequency induction motor drive. The model of the induction motor has been represented as a system of differential equations for flux linkages and angular velocity. These equations have been represented in Cartesian coordinate system, the use of which decreased their number to 7 instead of 10 equations and restricted ...

ژورنال: پرستاری کودکان 2022

Introduction: Examination of oral motor indices in infants helps treatment team members identify infants who are delayed in these indices earlier and use the order of occurrence of these indices in normal infants as a criterion for treating infants with motor delay. Literature shows that oral movement indices are different in different races, cultures, and languages. The aim of this study was t...

Journal: :iranian journal of public health 0
zeinab khodaverdi 1. dept. of motor behavior, faculty of physical education and sport sciences, kharazmi university , tehran, iran. abbas bahram 1. dept. of motor behavior, faculty of physical education and sport sciences, kharazmi university , tehran, iran. hassan khalaji 2. dept. of physical education and sport science, faculty of humanities, arak university , arak, iran. anoshirvan kazemnejad 3. dept. of biostatistics, faculty of medicine, tarbait modarres university , tehran, iran.

the main purpose of this study was to determine which correlate, perceived motor competence or motor skill competence, best predicts girls' physical activity behavior.a sample of 352 girls (mean age=8.7, sd=0.3 yr) participated in this study. to assess motor skill competence and perceived motor competence, each child completed the test of gross motor development-2 and physical ability sub-scale...

2012
F. Doisneau A. Murrone M. Massot

Solid rocket motor flows depend strongly on alumina granulometry, which spreads up with coalescence. Solving droplet sizes in unsteady flows is a modeling and numerical challenge, specially when high loadings generate retrocoupling. As an alternative to Lagrangian approaches, the Eulerian Multi-Fluid model describes polydispersity with size-sorted droplet fluids called sections. A two size mome...

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