11 September 2014, Hong Kong： Smartphones will account for two out of every, three mobile connections globally by 2020, according to a major new report by GSMA In- telligence, the research arm of the GSMA. The new st...11 September 2014, Hong Kong： Smartphones will account for two out of every, three mobile connections globally by 2020, according to a major new report by GSMA In- telligence, the research arm of the GSMA. The new study, ＂Smartphone forecasts and assumptions, 2007- 2020＂, finds that smartphones account for one in three mobile conneetions today, representing more than two billion mobile connections. It forecasts that the number of smartphone connections will grow three-fold over the next six years,展开更多
Shale oil occurs in free state （including condensate state）, adsorption state （adsorbed on kerogen and mineral particles） and dissolved state （dissolved in natural gas, residual water, etc.） in shales and adjace...Shale oil occurs in free state （including condensate state）, adsorption state （adsorbed on kerogen and mineral particles） and dissolved state （dissolved in natural gas, residual water, etc.） in shales and adjacent layers. The characterization of the occurrence of different hydrocarbons in shale oil, especially the quantitative separation of free hydrocarbons （mobile oil）, has been the current focus of shale oil research. Taken the shale oil from the Muli coalfield in Qilian Mountain as an example, this work extracted shale samples with organic solvents of different polarity to obtain different occurrence states of hydrocarbons in the oil-bearing shale and to reveal the compositional differences of the hydrocarbons. The result may provide new geochemical information for the occurrence and mobility of shale oil.展开更多
The carrier mobility of two-dimensional tetragonal carbon allotrope （T-CA） from porous graphene is investigated by first-principles calculations. T-CA can be constructed from divacancy and Stone-Thrower--Wales defec...The carrier mobility of two-dimensional tetragonal carbon allotrope （T-CA） from porous graphene is investigated by first-principles calculations. T-CA can be constructed from divacancy and Stone-Thrower--Wales defects from graphene. T-CA is a direct semiconductor with a band gap of 0.4 eV at F point. T-CA possesses a high carrier mobility of the order of 104 cm2V-ls-1. As our study demonstrates, T-CA has potential applications for next-generation electronic materials.展开更多
文摘11 September 2014, Hong Kong： Smartphones will account for two out of every, three mobile connections globally by 2020, according to a major new report by GSMA In- telligence, the research arm of the GSMA. The new study, ＂Smartphone forecasts and assumptions, 2007- 2020＂, finds that smartphones account for one in three mobile conneetions today, representing more than two billion mobile connections. It forecasts that the number of smartphone connections will grow three-fold over the next six years,
基金funded by the Science and Technology Innovation Fund of Petro China(grant No.2014D-5006-0105)the National Natural Science Foundation of China(grant No.41273066)
文摘Shale oil occurs in free state （including condensate state）, adsorption state （adsorbed on kerogen and mineral particles） and dissolved state （dissolved in natural gas, residual water, etc.） in shales and adjacent layers. The characterization of the occurrence of different hydrocarbons in shale oil, especially the quantitative separation of free hydrocarbons （mobile oil）, has been the current focus of shale oil research. Taken the shale oil from the Muli coalfield in Qilian Mountain as an example, this work extracted shale samples with organic solvents of different polarity to obtain different occurrence states of hydrocarbons in the oil-bearing shale and to reveal the compositional differences of the hydrocarbons. The result may provide new geochemical information for the occurrence and mobility of shale oil.
基金Supported by the Fundamental Research Funds for the Central Universitiesthe Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutionsthe National Natural Science Foundation of China under Grant No 11204123
文摘The carrier mobility of two-dimensional tetragonal carbon allotrope （T-CA） from porous graphene is investigated by first-principles calculations. T-CA can be constructed from divacancy and Stone-Thrower--Wales defects from graphene. T-CA is a direct semiconductor with a band gap of 0.4 eV at F point. T-CA possesses a high carrier mobility of the order of 104 cm2V-ls-1. As our study demonstrates, T-CA has potential applications for next-generation electronic materials.
