Results 41 to 50 of about 184,798 (233)

Machine Learning Approaches to Forecast the Realized Volatility of Crude Oil Prices

open access: yesJournal of Forecasting, EarlyView.
ABSTRACT This paper presents an evaluation of the accuracy of machine learning (ML) techniques in forecasting the realized volatility of West Texas Intermediate (WTI) crude oil prices. We compare several ML algorithms, including regularization, regression trees, random forests, and neural networks, to several heterogeneous autoregressive (HAR) models ...
Talha Omer   +3 more
wiley   +1 more source

Python-Assisted Development of High-Performance Fortran Codes: A Hybrid Methodology Integrating Symbolic Mathematics and Large Language Models

open access: yesComputation
The development of high-performance Fortran code for large-scale scientific simulations is inherently challenging: direct Fortran implementation demands substantial expertise in numerical methods, optimization and system architecture.
Daniil Tolmachev, Roman Chertovskih
doaj   +1 more source

Micropore Fractal Dimension on the Basis of the Analytical Solution of the Global Adsorption Isotherm

open access: yesAdsorption Science & Technology, 2001
A Fortran program relating to the fractal parameter D was created on the basis of LMDIF programs taken from the Minpack Library and also from the book entitled Numerical Recipes in Fortran * .
Roman Wojsz
doaj   +1 more source

Meşcere hacim artımının tayininde kullanılan ağaç türleri

open access: yesForestist, 1986
Bu çalışmada, uıegcere lıacım artmumn tayininde kullanılan tek ölçü yöntemlerinden Meyer’in eııterpolasyon yöntemi, direk yöntem, hacım artım yüzdesi yöntemi, meşcere projeksiyon tablosu yöntemi ve geçiş süresi yöntemi kargılaştırılmıştır.
Ahmet Yeşil
doaj   +1 more source

RNGSSELIB: Program library for random number generation. More generators, parallel streams of random numbers and Fortran compatibility

open access: yes, 2013
In this update, we present the new version of the random number generator (RNG) library RNGSSELIB, which, in particular, contains fast SSE realizations of a number of modern and most reliable generators \cite{RNGSSELIB1}. The new features are: i) Fortran
Barash, L. Yu., Shchur, L. N.
core   +1 more source

Static and Dynamic Analysis of Porous Gas Bearings Lubricated With Air, Refrigerant R‐134a, Helium and Hydrogen

open access: yesLubrication Science, EarlyView.
ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley   +1 more source

Formando lotes uniformes de reprodutores múltiplos e usando-os em acasalamentos dirigidos, em populações Nelore

open access: yesRevista Brasileira de Zootecnia, 2003
Um programa com base em análise de conglomerados foi desenvolvido com o objetivo de formar lotes de touros geneticamente semelhantes para serem empregados como grupos de reprodutores múltiplos em acasalamentos dirigidos.
Vânia Cardoso   +4 more
doaj  

A browser-based tool for conversion between Fortran NAMELIST and XML/HTML

open access: yesSoftwareX, 2017
A browser-based tool for conversion between Fortran NAMELIST and XML/HTML is presented. It runs on an HTML5 compliant browser and generates reusable XML files to aid interoperability.
O. Naito
doaj   +1 more source

Accelerating Fortran codes: A method for integrating Coarray Fortran with CUDA Fortran and OpenMP

open access: yesJournal of Parallel and Distributed Computing
Fortran's prominence in scientific computing requires strategies to ensure both that legacy codes are efficient on high-performance computing systems, and that the language remains attractive for the development of new high-performance codes. Coarray Fortran (CAF), part of the Fortran 2008 standard introduced for parallel programming, facilitates ...
McKevitt, James   +2 more
openaire   +3 more sources

GenL: an extensible fitting program for Laue oscillations and whole‐pattern fitting

open access: yesJournal of Applied Crystallography, EarlyView.
We present GenL, a flexible program utilizing differential evolution within a genetic algorithm that can be used to simulate and/or fit X‐ray diffraction data from epitaxial thin films exhibiting Laue oscillations.GenL is a flexible program that can be used to simulate and/or fit X‐ray reflectivity and X‐ray diffraction data from epitaxial thin films ...
Anna L. Ravensburg   +3 more
wiley   +1 more source

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