Time filter

Source Type

Pan Y.,Nanjing Southeast University | Zeng Y.,Nanjing Southeast University | Jing L.,Nanjing Southeast University | Zhang L.,Nanjing Southeast University | And 2 more authors.
Materials and Design | Year: 2014

The new compositions of ternary Cu-Zr-Ti bulk metallic glasses are predicted by integrating calculation of vacancy formation energy, mixing enthalpy and configuration entropy of the alloys based on thermodynamics of glass formers. The monolithic amorphous rods of 3mm diameter have been successfully fabricated, and characterized by X-ray diffractometry, differential scanning calorimetry, scanning electronic microscopy, transmission electronic microscopy and compression tests. The results show that the designed alloys possess good glass forming ability and excellent mechanical properties. The mechanical properties of the samples can be effectively improved by regulating their composition. The monolithic amorphous rod of Cu50Zr44Ti6 exhibits a high fracture strength of 1855MPa and excellent plastic deformation up to ~7.4%. The formation and propagation of shear bands in samples are also investigated. The enhancement of plastic deformation is mainly contributed to multiplication and intersection of shear bands. © 2013 Elsevier Ltd.

Pan T.,Institution of Engineering and Technology
Future Communication, Information and Computer Science - Proceedings of the International Conference on Future Communication, Information and Computer Science, FCICS 2014 | Year: 2015

Air conditioner, acronym of AC, has been widely applied, because AC controls the ambient temperature. The work analyzed core refrigeration technology of AC, on the basis of concept and characteristics of AC refrigeration technology, combining factors affecting the refrigeration technology of AC. It shows that only when adopting the new type refrigerant can high performance compressor and reasonable control procedure assure good refrigeration effect of AC. Application of AC can be improved if humanized settings such as the sleeping mode can be added into the control procedure. © 2015 Taylor & Francis Group, London.

Burden D.J.H.,Institution of Engineering and Technology
IEEE Internet Computing | Year: 2011

Three main approaches exist for virtual world standardization: interoperability, infrastructure, and semantic markup languages. Most standards efforts to date have concentrated on virtual worlds' graphical aspects rather than their semantic content. Here, the author uses an example audio-only virtual world to reveal the advantages of defining any virtual world in semantic terms, so it can be realized in various ways - for example, by graphics or audio. Examples of semantic markup already used in conjunction with virtual worlds indicate that this approach is promising. © 2011 IEEE.

News Article | January 26, 2016
Site: cleantechnica.com

According to an analyst from the International Renewable Energy Agency, onshore wind has dropped in cost to the level of coal-fired production. Michael Taylor, an energy analyst and renewable energy expert at the International Renewable Energy Agency (IRENA), has recently analyzed the cost of onshore wind power, and found that it has dropped to the level of coal-fired generation — and that’s even without including the cost of health and environmental effects caused by coal. “If the environmental and health costs of fossil fuels were properly priced at realistic levels, the situation would be even more favourable for wind,” said Michael Taylor. According to the new study published by Taylor and IRENA, 1 KWh of electricity produced by an onshore wind farm could cost in the realm of €0.05, and the same amount of electricity produced by an average coal-fired plant is only €0.001 cheaper. This brings onshore wind to within spitting-distance of coal, and as Taylor hinted at, when the cost of coal’s impact on society is included — i.e., the cost of global warming on countries, health impacts, and other similar impacts — onshore wind makes a strong case for ending the day as cheaper than coal. Incidentally, gas-fired electricity generation did better than both, coming in at €0.041/KWh. However, what is most interesting from this study, is that this sudden drop in onshore wind’s cost compared to that of fossil fuels has happened so quickly, society hasn’t followed the news. “Renewable power generation technologies can now provide electricity at very competitive levels,” Taylor said. “Yet despite these facts, many of the world’s decision-makers have yet to grasp how competitive renewables have become. Often, vested interests lead to propagation of the myth of ‘costly’ renewable energy. In other cases, the change has simply come so fast, and so unexpectedly, that public information has yet to catch up.” Between 1988 and 2014, the levelized cost of onshore wind-generated electricity has dropped by 65%, thanks in large part to the growth of the industry which has allowed the economics of scale and maturation of technology to drop the cost. IRENA data provided courtesy of The Institution of Engineering and Technology    Get CleanTechnica’s 1st (completely free) electric car report → “Electric Cars: What Early Adopters & First Followers Want.”   Come attend CleanTechnica’s 1st “Cleantech Revolution Tour” event → in Berlin, Germany, April 9–10.   Keep up to date with all the hottest cleantech news by subscribing to our (free) cleantech newsletter, or keep an eye on sector-specific news by getting our (also free) solar energy newsletter, electric vehicle newsletter, or wind energy newsletter.  

Wang Y.J.,Institution of Engineering and Technology | Wang L.Y.,Institution of Engineering and Technology
International Journal of Quantum Chemistry | Year: 2011

The noncovalent interactions between encapsulated water chains and single-walled carbon nanotube (SWCNT) are studied using a self-consistent charge density functional tight binding method with dispersion correction. The most interesting and important feature we observe is the diameter shrinking of CNTs when water chains are confined inside SWCNT. The diameter shrinking of CNTs can be suggested to the original of the van der Waals and H-π interaction between water chains and CNTs. The calculated Raman spectra show the interactions between SWCNTs and water chains probably give rise to a kind of "mode hardening effect," which agrees with the diameter shrinking of CNTs when water chains are confined inside SWCNT. © 2011 Wiley Periodicals, Inc.

Discover hidden collaborations