Results 31 to 40 of about 53,666 (140)

Estimation of Multilevel Simultaneous Equation Models through Genetic Algorithms

open access: yesMathematics, 2020
Problems in estimating simultaneous equation models when error terms are not intertemporally uncorrelated has motivated the introduction of a new multivariate model referred to as Multilevel Simultaneous Equation Model (MSEM).
Rocío Hernández-Sanjaime   +2 more
doaj   +1 more source

Programming biological models in Python using PySB

open access: yesMolecular Systems Biology, 2013
Mathematical equations are fundamental to modeling biological networks, but as networks get large and revisions frequent, it becomes difficult to manage equations directly or to combine previously developed models. Multiple simultaneous efforts to create
Carlos F Lopez   +3 more
doaj   +1 more source

Errors in variables in simultaneous equation models [PDF]

open access: yesJournal of Econometrics, 1977
Abstract The simultaneous equation model is considered when errors in variables are present in the exogenous variables. By means of a distributional assumption on the exogenous variables, the system is transformed into an augmented structural model.
openaire   +3 more sources

Analysis of the Stability of the Model for Forecasting Mutual Volumes Russia’s Trade with BRICS Partners

open access: yesФинансы: теория и практика
The paper is devoted to the construction of models for forecasting the volume of trade between Russia and the BRICS countries under sanctions. Trade between the BRICS countries is the economic foundation of their comprehensive interaction and prosperity,
L. O. Babeshko, V. A. Byvshev
doaj   +1 more source

SPECIES-SPECIFIC BIOMASS EQUATIONS FOR SMALL-SIZE TREE SPECIES IN SECONDARY TROPICAL FORESTS

open access: yesTropical and Subtropical Agroecosystems, 2019
Secondary tropical forests are largely dominated by small-diameter trees. Their contribution to the total stand productivity may be determinant for ecosystem functioning.
Ramiro Puc-Kauil   +7 more
doaj  

Mathematical Modeling and Simulation of the Dehydrogenation of Ethyl Benzene to Form Styrene Using Steady-State Fixed Bed Reactor

open access: yesTikrit Journal of Engineering Sciences, 2013
In this research, two models are developed to simulate the steady state fixed bed reactor used for styrene production by ethylbenzene dehydrogenation. The first is one-dimensional model, considered axial gradient only while the second is two-dimensional ...
Zaidon M. Shakoor
doaj  

Evaluation of Two Stage Modified Ridge Estimator and Its Performance

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018
Biasedestimation methods are more desirable than two stage least squares estimationfor simultaneous equations models suffering from the problem ofmulticollinearity.
Selma Toker, Nimet Özbay
doaj   +1 more source

Evaluation of Estimation Methods for Simultaneous Equations Models Across Varying Levels of Data Variability

open access: yesData Science and Engineering
Simultaneous Equations Model (SEM) is a set of regression equations where bidirectional relationships exist between variables. SEMs are widely used to model complex systems, capture the interdependencies between different variables, and make predictions ...
Belén Pérez-Sánchez   +3 more
doaj   +1 more source

ANALISIS HUBUNGAN ANTARA KETERSEDIAAN PUSAT INFORMASI DAN INTENSITAS PUBLIKASI KEGIATAN WISATA TERHADAP KONTRIBUSI EKONOMI SEKTOR PARIWISATA

open access: yesJ@ti Undip: Jurnal Teknik Industri, 2012
Penelitian ini ditujukan untuk menganalisis hubungan antara ketersediaan pusat informasi dan intensitas publikasi kegiatan wisata terhadap Kontribusi Ekonomi Sektor Pariwisata.
Wahyudi Sutopo
doaj   +1 more source

Numerical simulation of P-wave propagation in 2D VTI media with a topographic free surface by a curvilinear-grid finite-difference method

open access: yesFrontiers in Earth Science
Topographic free surfaces and seismic anisotropy significantly modify seismic wave propagation. With increasing demands for high-precision subsurface imaging, advanced seismic prospecting and seismological imaging methods require simultaneous ...
Yu-Xuan Li   +5 more
doaj   +1 more source

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