Results 31 to 40 of about 1,078,834 (211)

Research on Initiation of Carbon Dioxide Fracturing Pipe Using the Liquid Carbon Dioxide Phase-Transition Blasting Technology

open access: yesEnergies, 2021
Liquid carbon dioxide (L-CO2) phase-transition blasting technology (LCPTB) has caused wide concern in many fields, but there is a lack of research on the initiation of the carbon dioxide fracturing pipe.
Jieqin Xia   +5 more
doaj   +1 more source

Low Power Multi-Hop Networking Analysis in Intelligent Environments

open access: yesSensors, 2017
Intelligent systems are driven by the latest technological advances in many different areas such as sensing, embedded systems, wireless communications or context recognition. This paper focuses on some of those areas.
Josu Etxaniz, Gerardo Aranguren
doaj   +1 more source

Experimental study and empirical model development for self-leveling behavior of debris bed using gas-injection

open access: yesMechanical Engineering Journal, 2014
Studies on the self-leveling behavior of debris bed are crucial in the assessment of core disruptive accident (CDA) that could occur in sodium-cooled fast reactors (SFR).
Songbai CHENG   +10 more
doaj   +1 more source

Evaluation of the FMS empirical model using sediment survey of small reservoirs in the Fars province [PDF]

open access: yesپژوهش‌های آبخیزداری, 2018
The scarcity of reliable data for the rate of erosion and sedimentation on numerous watersheds all over the country makes the application of empirical models inevitable. One of these models is the Factorial Scoring Model (FMS).
Gholamreza Ghahari   +2 more
doaj   +1 more source

Empirical Models

open access: yes, 2016
In experimental or clinical pharmacokinetics, the simplest experiment consists in administering, in a rapid input, a large number of drug molecules having the same pharmacological properties and then in the subsequent time interval, sampling biological fluids in order to follow the decline in number of molecules or in drug concentration.
Macheras, P., Iliadis, A.
openaire   +2 more sources

An empirical comparison of interest rates using an interest rate model and nonparametric methods

open access: yes, 2003
A continuous time interest rate model is estimated using Gaussian estimation methods of Nowman (Journal of Finance, 52, 1695–706, 1997; Asia Pacific Financial Markets, 8, 23–34, 2001) and compare forecasts of interest rates with nonparametric methods on ...
Saltoglu, B.   +3 more
core   +1 more source

Toward Programmed Complex Stress-Induced Mechanical Deformations of Liquid Crystal Elastomers

open access: yesCrystals, 2020
We prepare a liquid crystal elastomer (LCE) with a spatially patterned liquid crystal director field from an all-acrylate LCE. Mechanical deformations of this material lead to a complex and spatially varying deformation with localised body rotations ...
Devesh Mistry, Helen F. Gleeson
doaj   +1 more source

Empirical Model for Estimation of Soil Permeability Based on Soil Texture and Porosity

open access: yesJurnal Teknik Pertanian Lampung, 2023
Soil permeability is the ability of the soil to pass water or air. Soil permeability is affected by texture, structure, and soil porosity. This study aims to develop a mathematical model to predict the value of soil permeability as a function of the ...
Siti Suharyatun   +4 more
doaj   +1 more source

A Hierarchical Panel Data Model for the Estimation of Stochastic Metafrontiers: Computational Issues and an Empirical Application

open access: yes, 2023
In the metafrontier literature, firms are put into groups, generally defined by technology or geography. Each group has its own technological frontier, and the metafrontier is the upper bound of these group frontiers.
Chen;Yi-yi
core   +1 more source

Estimativa das perdas de produtividade de grãos em cultivares de arroz (Oryza sativa) pela interferência do capim-arroz (Echinochloa spp.) Estimation of grain yield loss in rice (Oryza sativa) cultivars due to interference by barnyardgrass (Echinochloa spp.)

open access: yesPlanta Daninha, 2007
Objetivou-se com este trabalho avaliar o grau de interferência do capim-arroz em cultivares de arroz irrigado e comparar variáveis explicativas, visando identificar aquela que propicia melhor ajuste dos dados a modelo matemático. Para isso, foi conduzido
L. Galon   +4 more
doaj   +1 more source

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