نتایج جستجو برای: equation based modeling

تعداد نتایج: 3351122  

2010
Ofir Turel Chris K. Bart

This study examines the extent to which board of directors are providing ‘governance oversight’ of their organization’s IT activities and whether their efforts are making any difference in terms of organizational performance. Building on contingency theory we theorize that the magnitude of IT oversight exercised by boards depends on an organization‘s particular IT situation and especially its n...

2003
Sašo Džeroski Ljupčo Todorovski

This paper is concerned with integrating knowledge-based modeling or modeling from first principles, with data-driven or automated modeling of dynamic systems. The approach presented here includes methods for equation discovery: unlike mainstream system identification methods, which work under the assumption that the form of the equations is known, equation discovery systems explore a space of ...

Many simulation algorithms (chemical reaction systems, differential systems arising from the modeling of transient behavior in the process industries and etc.) contain the numerical solution of systems of differential equations. For the efficient solution of the above mentioned problems, linear multistep methods or Runge-Kutta technique are used. For the simulation of chemical procedures the ra...

The Smagorinsky and One-Equation sub-grid scales (SGS) for modeling of large scale pool fire using Large Eddy Simulation (LES) has been used and compared. The fire heat release rate was 2.07 MWatt and the fuel was Methane. Based on the mixture fraction approach and infinity fast chemistry assumption, the mean velocity profile and turbulence kinetic energy are calculated and compared against exp...

2007
Landon Kleis Paul Chwelos Ronald Ramirez

IT business value research has identified a dual role of IT investment: to increase the firm’s productivity by improving or replacing other inputs, and to reshape intermediate value-creation processes. Innovation is one such process that has been recognised as critically important. This paper incorporates the innovation process in a model of overall production to estimate the effect of IT in th...

2013
Juho Hamari Jonna Koivisto

This paper investigates how social factors predict attitude towards gamification and intention to continue using gamified services, as well as intention to recommend gamified services to others. The paper employs structural equation modelling for analyses of data (n=107) gathered through a survey that was conducted among users of one of the world’s largest gamification applications for physical...

2014
Miao Liu Guohua Liu Li Gong Dongbo Wang Jian Sun

Many studies have focused on the relationship between vegetation biomass and environmental factors in grassland. However, several questions remain to be answered, especially with regards to the spatial pattern of vegetation biomass. Thus, the distributed mechanism will be explored in the present study. Here, plant biomass was measured at 23 sites along a transect survey during the peak growing ...

Journal: :Learning and individual differences 2011
Young-Suk Kim Stephanie Al Otaiba Cynthia Puranik Jessica Sidler Folsom Luana Greulich Richard K Wagner

The present study examined the components of end of kindergarten writing, using data from 242 kindergartners. Specifically of interest was the importance of spelling, letter writing fluency, reading, and word- and syntax-level oral language skills in writing. The results from structural equation modeling revealed that oral language, spelling, and letter writing fluency were positively and uniqu...

Journal: :NeuroImage 2006
Guillaume Marrelec Alexandre Krainik Hugues Duffau Mélanie Pélégrini-Issac Stéphane Lehéricy Julien Doyon Habib Benali

Examination of functional interactions through effective connectivity requires the determination of three distinct levels of information: (1) the regions involved in the process and forming the spatial support of the network, (2) the presence or absence of interactions between each pair of regions, and (3) the directionality of the existing interactions. While many methods exist to select regio...

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