نتایج جستجو برای: moment coefficient

تعداد نتایج: 227145  

2011
Hervé Abdi

The congruence between two configurations of points quantifies their similarity. The configurations to be compared are, in general, produced by factor analytic methods which decompose an “observations by variables” data matrix and produce one set of factor scores for the observations and one set of factor scores (i.e., the “loadings”) for the variables. The congruence between two sets of factor...

Journal: :journal of physical & theoretical chemistry 2008
majid monajjemi esmat mohammadinasab fatemeh shafiei

the electric quadrupole, hexadecapole moments, energy (kjmol -1) for some armchair polyhex carbon nanotubes tuvc6[2p,q] are performed by beck-lee-yang-parr [b3lyp] on 3-21g basis set using the standard procedure indices gaussian 98, then the padmakar-ivan (pi) index of tuvc6[2p,q] nanotubes in the terms of their circumference (2p) and lengh (q) is calculated and the relationships between the pa...

2000
M. I. Bazhal N. I. Lebovka E. I. Vorobiev

Influence of pulsed electric field (PEF) simultaneous to pressure treatment on moisture expression from fine-cut cellular raw material has been investigated. Dependencies of specific conductivity σ, liquid yield Y , instantaneous flow rate v and qualitative juice characteristics at different modes of PEF treatment are discussed. Three main consolidation phases were observed in a case of mechani...

1999
D. C. Jiles M. Pardavi-Horvath

One of the most important remaining issues in the theory of hysteresis is a complete description of the physical meaning of the parameters that define the model equations.’ In common with the Stoner-Wohlfarth theory of rotational processes, the theory of hysteresis provides one of the few theories of hysteresis based on underlying physical mechanisms, rather than curve fitting models. In this p...

Journal: :I. J. Artificial Intelligence in Education 2011
Ryan Shaun Joazeiro de Baker Adam B. Goldstein Neil T. Heffernan

Intelligent tutors have become increasingly accurate at detecting whether a student knows a skill, or knowledge component (KC), at a given time. However, current student models do not tell us exactly at which point a KC is learned. In this paper, we present a machine-learned model that assesses the probability that a student learned a KC at a specific problem step (instead of at the next or pre...

Journal: :Esteem 2021

This research aims to determine the relationship between self-concept, reading attitudes, and comprehension of ninth grade students SMPN 51 Palembang. In this study 30 were selected as a stratified random sample. tests are used collect data. The analysis was performed using Pearson product moment correlation coefficient, Normality Test, Homogeneity Linearity Test multiple regression. results sh...

1998
Jay M. Brandon

As airplane designs have trended toward the expansion of flight envelopes into the high angle of attack and high angular rate regimes, concerns regarding modeling the complex unsteady aerodynamics for simulation have arisen. Most current modeling methods still rely on traditional body axis damping coefficients that are measured using techniques which were intended for relatively benign flight c...

Journal: :desert 2012
a.r. keshtkar a. salajegheh m. najafi hajivar

statistical frequency analysis is the most common procedure for the analysis of flood data at a gauged location thatin first step it is needed to select a model to represent the population. among them, the central moment has been themost common and widely used, and with the using of computers, the application of the maximum likelihood hasincreased. this research was carried out in order to reco...

2016
YULING LIU GUOJIANG XIN YONG XIAO Yuling LIU Guojiang XIN Yong XIAO

A robust image hashing method based on radon transform and invariant features is proposed for image authentication, image retrieval, and image detection. Specifically, an input image is firstly converted into a counterpart with a normalized size. Then the invariant centroid algorithm is applied to obtain the invariant feature point and the surrounding circular area, and the radon transform is e...

Journal: :مکانیک سیالات و آیرودینامیک 0
مهدی رمضانی¬زاده عبداله محمدی

determining characteristics and behavior of fluid flow and obtaining the aerodynamic coefficients are important and considerable tasks in investigation of flow over the bodies. in this research, leading edge radius effects on the flow behavior over a delta wing with a sweep angle of 50 degree at different reynolds numbers between 0.5×106 and 2.5×106 are investigated numerically. three different...

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