Results 41 to 50 of about 93,796 (222)

Components of Alaska Fuel Costs: An Analysis of the Market Factors and Characteristics that Influence Rural Fuel Prices [PDF]

, 2010
Many Alaskans face extremely high, volatile fuel prices. Little is publicly known about the actual structure of Alaska’s rural fuel markets and what drives prices at the community level.
Fay, Ginny, Meléndez, Alejandra Villalobos, Szymoniak, Nick   +2 more
core  

Experimental methods in chemical engineering: Atomic absorption spectrometry—AAS

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Elements absorb electromagnetic radiation (light) of a specific wavelength in proportion to the number of atoms in its path. As the atoms absorb this light energy, electrons rise from the ground state to an excited state. In atomic absorption spectrometry (AAS), high temperatures produce clouds of atoms from the sample (atomization) and ...
Emily Cintia Tossi de A. Costa, Jildimara de Jesus Santana, Viviane de Oliveira Campos, Felipe Fernandes Barbosa, Gregory S. Patience   +4 more
wiley   +1 more source

Desulfurization of Benzothiophene Derivatives by Solvent Extraction Coupled With Oxidation Using Oxomolybdenum(VI) Bis(pyrazolyl)methane Catalysts

European Journal of Inorganic Chemistry, EarlyView.
A polymeric hybrid material formulated as [MoO3(bis(pyrazolyl)methane)] has been prepared and used as a catalyst precursor for the complete oxidative desulfurization of a model diesel containing recalcitrant benzothiophene derivatives. The precursor is converted in situ to an oxodiperoxo active species which is retained in the recyclable extractant ...
Ana C. Gomes, Fátima Mirante, Isabel S. Gonçalves, Martyn Pillinger, Salete S. Balula   +4 more
wiley   +1 more source

A Novel Modular Multi-Unit Cell Permanent Magnet Thrust Bearing with Bionic Design and Load-Carrying Capacity Analysis

Applied Sciences
Permanent magnet thrust bearings have garnered significant attention due to their high rotational speeds, low noise levels, and excellent vibration-damping performance.
Xiangdong Yu, Qi Wang, Zhongsheng Yan, Wenfeng Yu, Xingyue Shang, Suimeng Zhou, Jimin Zhang   +6 more
doaj   +1 more source

Robust Control Using a Matrix Converter to Enhance Wind Turbine Systems

Energy Science &Engineering, EarlyView.
This study uses a more efficient and effective solution to improve the operational performance of a wind turbine‐based power system. This system uses a doubly fed induction generator and relies on a matrix converter and fractional‐order proportional–integral controller.
Sihem Ghoudelbourk, Habib Benbouhenni, Adil Yahdou, Zakaria Mohamed Salem Elbarary, Nicu Bizon   +4 more
wiley   +1 more source

Modeling and Analysis of Actuators in Multi-Pump Waterjet Propulsion Systems

Journal of Marine Science and Engineering
Waterjet propulsion, which generates thrust by ejecting water jets, has attracted significant attention in modern high-performance vessels due to its efficiency, superior cavitation resistance, and excellent maneuverability.
Shuli Jia, Yinuo Guo, Yuxue Liu, Dali Wei, Chong Qu, Liyong Ma   +5 more
doaj   +1 more source

Life cycle assessment of intensive striped catfish farming in the Mekong Delta for screening hotspots as input to environmental policy and research agenda [PDF]

, 2011
Purpose Intensive striped catfish production in the Mekong Delta has, in recent years, raised environmental concerns. We conducted a stakeholder-based screening life cycle assessment (LCA) of the intensive farming system to determine the critical ...
Bosma, R.H., Pham Thi Ahn, Potting, J.
core   +2 more sources

Direct and Spatial Effects of Carbon Emission Trading System on Carbon Emissions in the Logistics Sector—Evidence From the Yangtze River Economic Belt in China

Energy Science &Engineering, EarlyView.
(1) A theoretical framework for examining the impact of the CETS on carbon emissions in the LS of the YREB is developed based on Porter's hypothesis and synergy theory. (2) Assessing the Effects of a CETS through DID Modeling. (3) The spatial correlation of carbon emissions within the LS is examined through the development of a SDM.
Zhaoyang Zhao, Chong Ye, Jing Huang
wiley   +1 more source

Transient torsional vibration analysis of marine diesel engine under short-circuit impact

Zhongguo Jianchuan Yanjiu
ObjectivesIn order to formulate an optimization scheme for the torsional vibration parameters of a marine diesel generator shaft system, it is necessary to analyze the transient torsional vibration characteristics of the diesel generator under short ...
Congcong XU, Gang LIANG, Jie TAO, Yafei JIAO, Jinyuan CHEN, Pengcheng WANG, Mengcan DENG   +6 more
doaj   +1 more source

Minimising carbon emissions and energy expended for the New Zealand transport sector through to 2050 [PDF]

, 2014
Carbon Emissions Pinch Analysis (CEPA) and Energy Return on Energy Investment (EROI) analysis are combined to investigate the feasibility of New Zealand (NZ) reaching a 1990 emission levels for transport in 2050.
Atkins, Martin John, Chand, Alvin, Kamp, Peter J.J., Neale, James R., Walmsley, Michael R.W., Walmsley, Timothy Gordon   +5 more
core   +1 more source