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Now showing items 1711-1720 of 1898
Pore networks to characterize formation damage due to fines at varied confinement and sand shape
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
Carbon sequestration in geological formations is in demand for many applications, especially energy production from hydrates. During gas production in a sandy hydrate reservoir, two phase flow and changes in confinement ...
Grouping minimum REV of porosity and tortuosity based on descriptors of sand grains
(
European Association of Geoscientists and Engineers, EAGE
, 2019 , Conference Paper)
In sandy reservoirs, selecting a representative elementary volume (REV) for the pore scale, is essential for predictive upscaling toward the reservoir scale. The porosity and tortuosity of a sand media are used for REV ...
Deadbeat control with multi-sampling compensation for medium-voltage motor drives by cascaded multi-cell inverter using FPGA based hardware controller
(
IEEE
, 2011 , Conference Paper)
Multi-cell inverter include an array of single-phase inverters capable of handling higher voltage ratings with lower rating power electronics devices. In this paper, a deadbeat control combined with a multi-sampling ...
Identifying the key performance challenges to achieve improved export performance for Qatari SMEs
(
Elsevier
, 2019 , Conference Paper)
Small and medium enterprises in Qatar, similar to their counterparts in other emerging countries, face many challenges by entering international markets. This study aims to identify and analyze the key performance challenges ...
Evaluating greywater and A/C condensate daily volume and water quality in urban settings
(
American Society of Agricultural and Biological Engineers
, 2011 , Conference Paper)
Due to increasing water demand as a result of population growth and improvement in living standards, many countries with arid climate are already facing water shortages that are being met by expensive desalination projects. ...
A/C condensate for water reuse: An approach towards environmental sustainability in Doha
(
American Society of Agricultural and Biological Engineers
, 2012 , Conference Paper)
A/C Condensate is a relatively untapped alternative source of water that might be readily available especially in hot arid climates. The objective of this study is to establish the feasibility of the A/C condensate as the ...
Telecommunication-wavelength lasing in er-doped gan multiple quantum wells at room temperature
(
OSA - The Optical Society
, 2018 , Conference Paper)
We report the realization of room-temperature, stimulated-emission in Er-doped-GaN multiple-quantum-wells at the 1.5-µm. Structures were grown by MOCVD and lasing was confirmed by threshold-behaviors of emission-intensity ...
Optimal Production Planning Strategy for Deteriorating Items in Terms of Emission Tax, Pollution, and R&D Investment
(
Springer Science and Business Media B.V.
, 2018 , Conference Paper)
Firms are faced with the question of what policies to implement to ensure efficient abatement behavior? In this paper, we aim to determine the optimal production rate and the optimal investment rate in pollution abatement ...
Adaptive and unequal probability survey designs for environmental management
(
The Modelling and Simulation Society of Australia and New Zealand Inc
, 2011 , Conference Paper)
Designing an efficient large-area survey is a challenge, especially in environmental science when many populations are rare and clustered. Adaptive and unequal probability sampling designs are appealing when populations ...
Multi-species attributes as the condition for adaptive sampling of rare species using two-stage sequential sampling with an auxiliary variable
(
The Modelling and Simulation Society of Australia and New Zealand Inc
, 2011 , Conference Paper)
Assessing populations of rare species is challenging because of the large effort required to locate patches of occupied habitat and achieve precise estimates of density and abundance. The presence of a rare species has ...