Results 21 to 30 of about 3,506,686 (362)

Study on Comprehensive Recovery and Utilization of a Low-grade Gold-Copper Ore in Fujian

open access: yesKuangchan zonghe liyong, 2022
A low-grade gold-copper mixed ore in Fujian contains Au 0.36 g/t, Cu 0.29%, Ag 7.4 g/t, S 4.02%. If it is directly cyanidized, copper enters the gold cyanide leaching system, not only cannot be recovered, It will also worsen the gold selection index and ...
Tao Yue   +4 more
doaj   +1 more source

Depression, School Performance, and the Veridicality of Perceived Grades and Causal Attributions [PDF]

open access: yes, 2002
An external criterion was assessed to test whether depressives have distorted perceptions of covariation information and whether their attributions are consistent with this information.
Buchanan, G. M.   +7 more
core   +1 more source

Performance Analysis on a Power and Ejector-Refrigeration System and the Involved Ejector

open access: yesFrontiers in Energy Research, 2019
In order to make better use of the thermal energy at low and medium temperature and improve the organic Rankine cycle performance, the power, and ejector-refrigeration system has been put forward and a lot of research has been carried out.
Xiaolin Zhang   +5 more
doaj   +1 more source

A dynamic model for the optimization of oscillatory low grade heat engines [PDF]

open access: yes, 2011
The efficiency of a thermodynamic system is a key quantity on which its usefulness and wider application relies. This is especially true for a device that operates with marginal energy sources and close to ambient temperatures.
Markides, CN, Smith, TCB
core   +2 more sources

Numerical Simulation and Analysis of CO2 Removal in a Polypropylene Hollow Fiber Membrane Contactor

open access: yesInternational Journal of Chemical Engineering, 2014
This present study shows a comprehensive 2D numerical model for removal of CO2 in a polypropylene (PP) hollow fiber membrane contactor (HFMC) using the computational fluid dynamics (CFD) method.
Zhien Zhang   +3 more
doaj   +1 more source

A numerical model of a zinc-para-benzoquinone membrane-free organic flow battery

open access: yesEnergy Reports, 2022
Organic flow batteries have received a great deal of interest in the past five years as potential candidates for large-scale energy storage, due to their low costs, abundant active materials and multi-electron transfers.
Feilin Yu, Akeel Shah, Puiki Leung
doaj   +1 more source

Scenarios Analysis on Electric Power Planning Based on Multi-Scale Forecast: A Case Study of Taoussa, Mali from 2020 to 2035

open access: yesEnergies, 2021
The increase in electricity demand is caused by population density, gross domestic product growth and technological conditions. A long-term forecast study on the electricity demand could be a promising alternative to the investment planning of power ...
Moussa Kanté, Yang Li, Shuai Deng
doaj   +1 more source

Recent Trends in Load Forecasting Technology for the Operation Optimization of Distributed Energy System

open access: yesEnergies, 2017
The introduction of renewable resources into the distributed energy system has challenged the operation optimization of the distributed energy system. Integration of new technologies and diversified characteristics on the demand side has exerted a great ...
Pengwei Su   +6 more
doaj   +1 more source

MicroRNA-551b expression profile in low and high-grade cervical intraepithelial neoplasia [PDF]

open access: yes, 2018
OBJECTIVE: To evaluate the expression of microRNA (miR)-551b in patients with low and high grade cervical intraepithelial neoplasia (CIN) and to find an association with high-risk Human Papillomavirus (HR-HPV) infection-related prognostic biomarkers ...
Bordi, G   +7 more
core   +1 more source

Promotion of carbon fixation and emission reduction by microalgae with optical fiber/light guide tubes

open access: yesMeitan kexue jishu
China’s coal-fired power plants emit over 5.7 billion tons of CO2 annually. To realize the dual carbon goals in time, it is necessary to reduce the carbon emissions of coal-fired power plants. Microalgae carbon fixation can efficiently absorb CO2 through
Ao XIA   +6 more
doaj   +1 more source

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