نتایج جستجو برای: model validation

تعداد نتایج: 2227151  

Journal: :international journal of automotive engineering 0
esfahanian mahmoodian amiri masih tehrani nehzati hejabi

in the present study, a model of a large lithium polymer (li-po) battery for use in the simulation of hybrid electric vehicles (hevs) is developed. to attain this goal, an equivalent circuit (ec) consisting of a series resistor and two rc parallel networks is considered. the accuracy and the response time of the model for use in an hev simulator are studied. the battery parameters identificatio...

Journal: :اکو هیدرولوژی 0
ناصر طهماسبی پور استادیار گروه مرتع و آبخیزداری، دانشکدۀ کشاورزی، دانشگاه لرستان، خرم‏آباد امید رحمتی دانشجوی دکتری علوم و مهندسی آبخیزداری، دانشگاه لرستان، خرم ‏آباد سمیرا قربانی نژاد دانشجوی کارشناسی‏ ارشد مهندسی آبخیزداری، دانشگاه لرستان، خرم ‏آباد

gully erosion constitutes a major problem in natural resources management and soil conservation, which causes severe land degradation in arid and semi-arid areas. therefore, determination of gully prone area and identification of gully conditioning factors can help to managers and decision makers to reduce the hazard of gully erosion. the aim of this study is to predictthe gully erosion suscept...

The present study was an attempt to refine a qualitatively proposed model of ELT discipline-specific reading strategies to provide a better interpretation of qualitative findings. Hence, in line with the components of the previous model, that is, 6 factors and 32 categories, a 6-hypothetical factor and a 33-item questionnaire were considered in the design of the ELT discipline-specific question...

Purpose: The purpose of this paper was to validate a model for using the entrepreneurial ecosystem in e-banking. Method: This study was a cross-sectional survey in terms of method and time of data collection. The statistical population included managers and experts of the country's electronic banking system. The sample size was 384 people and sampling was done by simple random method. Structur...

E Salahi Parvin N Gholami P Asadolahi P Hanafizadeh

There are three major strategies to form neural network ensembles. The simplest one is the Cross Validation strategy in which all members are trained with the same training data. Bagging and boosting strategies pro-duce perturbed sample from training data. This paper provides an ideal model based on two important factors: activation function and number of neurons in the hidden layer and based u...

Journal: :research in pharmaceutical sciences 0
m shahlaei a fassihi l saghaie e arkan a pourhossein

quantitative relationships between molecular structure of forty eight aldehyde compounds with their known cathepsin k inhibitory effects were discovered by partial least squares (pls) method. evaluation of a test set of 10 compounds with the developed pls model revealed that this model is reliable with a good predictability. since the qsar study was performed on the basis of theoretical descrip...

Abstract A dataset of (E)-N’-benzylideneisonicotinohydrazide derivatives as a potent anti-mycobacterium tuberculosis has been investigated utilizing Quantitative Structure-Activity Relationship (QSAR) techniques. Genetic Function Algorithm (GFA) and Multiple Linear Regression Analysis (MLRA) were used to select the descriptors and to generate the correlation QSAR models that relate the Mi...

Journal: :journal of mining and environment 2012
akbar farzanegan bahareh arabzadeh vahid hasanzadeh

discrete element method (dem) is extensively used for mathematical modeling and simulating the behavior of discrete discs and discrete spheres in two and three dimensional space, respectively. prediction of particles flow regime, power draw and kinetic energy for a laboratory or an industrial mill is possible by dem simulation. in this article, a new approach was used to assess the main paramet...

Journal: :journal of applied and computational mechanics 2014
seyed mohammadjavad zeidi miralam mahdi

investigating nozzle’s orifice flow is challenging both experimentally and theoretically. this paper focuses on simulating flow inside diesel injector nozzle via ansys fluent v15. validation is performed with experimental results from winkhofler et al (2001). several important parameters such as mass flow rate, velocity profiles and pressure profiles are used for this validation. results includ...

The accurate determination of river flow in watersheds without sufficient data is one of the major challenges in hydrology. In this regard, given the diversity of existing hydrological models, selection of an appropriate model requires evaluation of the performance of the hydrological models in each region. The objective of this study was to compare the performance of artificial neural network ...

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