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Research Modification of Liquid Hydrocarbons Irradiated by a Nanosecond e-Beam
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作者 Yury Savinykh Victor M. Orlovskii 《Journal of Chemistry and Chemical Engineering》 2013年第6期573-576,共4页
Air or inert atmosphere irradiation of liquid normal alkanes C5-C8 and benzene by electron beam was carried out. Oxidation (in the air) or isomerization (in the inert gases) of liquid normal alkanes under electron... Air or inert atmosphere irradiation of liquid normal alkanes C5-C8 and benzene by electron beam was carried out. Oxidation (in the air) or isomerization (in the inert gases) of liquid normal alkanes under electron beam was shown. Action of electron beam on benzene molecules in the air or in the inert atmosphere leads to biphenyl, terphenyl and polymers. Irradiation by the bunch of electrons of mixture hexane with 10% benzene reduced to firm fractions (fullerene's similar structures) in a deposit. 展开更多
关键词 Liquid normal alkanes BENZENE electron beam fullerene's similar structures.
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Configuration analysis of a chain-type reconfigurable modular robot inspired by normal alkane 被引量:5
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作者 FENG JingKai LIU JinGuo 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2021年第6期1167-1176,共10页
Normal alkane is an unbranched alkane whose structural formula is H–CH2–CH2–…–CH2–…–CH2–H,which can be regarded as a reconfigurable chain-type structure composed of–CH2–modules.Inspired by normal alkane,a n... Normal alkane is an unbranched alkane whose structural formula is H–CH2–CH2–…–CH2–…–CH2–H,which can be regarded as a reconfigurable chain-type structure composed of–CH2–modules.Inspired by normal alkane,a normal-alkane-like reconfigurable modular robot (NAR) is proposed.The module consists of two differential gear trains mounted orthogonally.Each differential gear train contains two input degrees of freedom and two output degrees of freedom.Due to the genderless interface design,multiple modules can be assembled into chain-type configuration.With the genderless interfaces and flexible degrees of freedom,NAR can be reconfigured into different dimensions of spatial configuration.The bond matrix is used to describe the configuration,which represents the bond attitude of the adjacent connected modules.In addition,full interconnected geometric feature (FIGF) algorithm is proposed for non-isomorphic configuration enumeration and judgment.The configurations with three modules are simulated and the results verify the feasibility of the algorithm.Finally,a prototype with three modules is fabricated and the configuration motion sequence is demonstrated. 展开更多
关键词 reconfigurable modular robot chain-type normal alkane configuration enumeration non-isomorphic configuration
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Molecular distribution and seasonal variation of hydrocarbons in PM_(2.5) from Beijing during 2006 被引量:5
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作者 Yushan Li Junji Cao +4 位作者 Jianjun Li Jiamao Zhou Hongmei Xu Renjian Zhang Zhiyun Ouyang 《Particuology》 SCIE EI CAS CSCD 2013年第1期78-85,共8页
Normal (n)-alkanes and polycyclic aromatic hydrocarbons (PAHs) in PM2.5 were collected from Beijing in 2006 and analyzed using a thermal desorption-GC/MS technique. Annual average concentrations of n-alkanes and P... Normal (n)-alkanes and polycyclic aromatic hydrocarbons (PAHs) in PM2.5 were collected from Beijing in 2006 and analyzed using a thermal desorption-GC/MS technique. Annual average concentrations of n-alkanes and PAHs were 282 ±96 and 125 ± 150ng/m^3, respectively: both were highest in winter and lowest in summer. C19-C25 compounds dominated the n-alkanes while benzo[b]fluoranthene, benzo[e]pyrene, and phenanthrene were the most abundant PAHs. The n-alkanes exhibited moderate correlations with organic carbon (OC) and elemental carbon (EC) throughout the year, but the relation- ships between the PAHs, OC and EC differed between the heating and non-heating seasons. The health risks associated with PAHs in winter were more than 40 times those in spring and summer even though the PM2.5 loadings were comparable. Carbon preference index values (〈1.5) indicated that the n-alkanes were mostly from fossil fuel combustion. The ratios of indeno[123-cd]pyrene to benzo[ghi]pyrelene in summer and spring were 0.58 ± 0.12 and 0.63 ± 0.09, respectively, suggesting that the PAHs mainly originated from motor vehicles, but higher ratios in winter reflected an increased infuence from coal, which is extensively burned for domestic heating. A comprehensive comparison showed that PAH pollution in Beijing has decreased in the past 10 years. 展开更多
关键词 PM2.5 normal alkanes (n-alkanes Polycyclic aromatic hydrocarbons (PAHs) Air pollution Beijing
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