Results 71 to 80 of about 355,757 (390)

Dynamic Optimization and Production Planning of Thermal Cracking Operation [PDF]

open access: yesModeling, Identification and Control, 2003
This work addresses the dynamic optimization of the production period of thermal crackers with respect to coke formation in the cracking coil and transfer line exchanger.
Emil H. Edwin, Jens G. Balchen
doaj   +1 more source

A study of the porosity of nuclear graphite using small-angle neutron scattering [PDF]

open access: yes, 2013
Small angle neutron scattering (SANS) measures porosity in nuclear graphites, including both open pores, caused by escaping decomposition gases, and internal cracks (in coke particles) generated by anisotropic thermal contraction along the c-direction ...
Bale   +17 more
core   +1 more source

Bridging Green Chemistry and Circular Economy: A Pathway to Sustainable Polyester Plastics Through Feedstock, Synthesis, and Waste Upcycling

open access: yesAdvanced Science, EarlyView.
This review summarizes green and low‐carbon strategies throughout the entire life cycle of polyester plastics, including sustainable monomer synthesis, optimization polymerization, efficient recycling, and advanced upcycling technologies. The synergistic implementation of these strategies is expected to significantly promote the development of a ...
Jinzhou Li   +5 more
wiley   +1 more source

Sexagesimal scale for mapping human genome Escala sexagesimal para mapear el genoma humano

open access: yesRevista Chilena de Historia Natural, 2001
In a previous work I designed a diagram of the human genome based on a circular ideogram of the haploid set of chromosomes, using a low resolution scale of Megabase units.
RICARDO CRUZ-COKE
doaj  

Briquetting of Coke-Brown Coal Mixture [PDF]

open access: yes, 1998
The paper presents the results of the research of briquetting a coke-brown coal composite The operation consists of the feeding crushed coal and coke to moulds and pressing into briquettes which have been made in the Laboratories at the Mining Faculty of
Lukáè Jozef, Ïurove Juraj
core  

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira   +4 more
wiley   +1 more source

Study on the Control Effect of Geological Structure on Water-bearing System and the Identification of Water Inrush Source

open access: yesTaiyuan Ligong Daxue xuebao
[Purposes] By taking the water inrush event of Jiaguo Coal Mine as an example, the control effects of regional geological structure and mine field geological structure on the water-bearing system of Taiyuan Formation in coal mine are systematically ...
WU Zhigao   +5 more
doaj   +1 more source

More than ore : modern Spanish steel, 1856-1936 [PDF]

open access: yes, 2001
Contrasting the iron law of the principle of comparative advantages as the determinant of the international division of labour has attracted dissidents to the international trade paradigm over the years.
Houpt, Stefan
core   +4 more sources

The Analysis of the Experience in Commercialization of Indirect Coal Liquefaction Technologies in the World [PDF]

open access: yesProblemi Ekonomiki, 2017
It is substantiated that, taking into account the world trends in the development of fuel and energy complexes, in the near future the most preferable direction in using solid fossil fuels will become not just their burning but advanced thermochemical ...
Rudyka Viktor I.
doaj  

Regional monopoly and interregional and intraregional competition: the parallel trade in Coca-Cola between Shanghai and Hangzhou in China [PDF]

open access: yes, 2006
This article uses a “principal-agent-subagent” analytical framework and data that were collected from field surveys in China to (1) investigate the nature and causes of the parallel trade in Coca-Cola between Shanghai and Hangzhou and (2) assess the ...
Mok, Vincent, Yeung, Godfrey
core   +1 more source

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