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Basic Problems in Design and Inverse Engineering Solution for Outer Characteristic of Vehicle Suspension Shock Absorbers
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作者 俞德孚 陈庆东 李文君 《Journal of Beijing Institute of Technology》 EI CAS 2003年第2期166-171,共6页
Based on the theory and the practical experiences of linearity design of feasible design area and inverse solution of non linear outer characteristic of suspension shock absorber, in accordance with non linearity ou... Based on the theory and the practical experiences of linearity design of feasible design area and inverse solution of non linear outer characteristic of suspension shock absorber, in accordance with non linearity outer characteristic formed by open up damping coefficient, full open damping coefficient and smoothness to safety ratio of suspension shock absorber, a method and a research conclusion of the feasible design and inverse solution for the basic problems of designing and inverse solution of non linear outer characteristic of suspension damping components are provided. 展开更多
关键词 vehicle suspension outer characteristic of shock absorber designing and inverse engineering
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Signal characteristics of coal and rock dynamics with micro-seismic monitoring technique 被引量:3
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作者 Ding Yanlu Dou Linming +4 位作者 Cai Wu Chen Jianjun Kong Yong Su Zhenguo Li Zhenlei 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期683-690,共8页
In this study, differences of signal characteristics between mine shocks and coal and gas outbursts in coal mines were examined with the micro-seismic monitoring technique and time-frequency analysis. The duration of ... In this study, differences of signal characteristics between mine shocks and coal and gas outbursts in coal mines were examined with the micro-seismic monitoring technique and time-frequency analysis. The duration of the mine shock is short while the coal and gas outburst lasts longer. The outburst consists of three stages: the pre-shock, secondary shock and main shock stage, respectively. The velocity amplitude of the mine shock is between 10 s and 10-3 m/s, which is higher than that of the outburst with the same energy level. In addition, in both cases, the correlation between the velocity amplitude and energy is positive while the correlation between the signal frequency band distribution and energy is negative. The signal frequency band of the high energy mine shock is distributed between 0 and 50 Hz, and the low energy mine shock is between 50 and 100 Hz. The fractal characteristics of mine shocks were studied based on a fractal theory. The box dimensions of high energy mine shocks are lower than the low energy ones, however, the box dimensions of outbursts are higher than that of mine shocks with the same energy level. The higher box dimensions indicate more dangerous dynamic events. 展开更多
关键词 Mine shock Coal and gas outburst Micro-seismic signal Spectrum characteristics Fractal characteristics
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Expression analysis of two reverse duplicated small heat shock protein genes in rice(Oryza sativa L.) 被引量:1
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作者 GUO Hong-xia ZENG Wen-zhi +8 位作者 WANG Chuang-yun FENG Jing-lei TANG Hui-wu BAI Mei LIU Yao-guang ZHAO Li WANG Lu-jun FAN Tao GUO Jing-xin 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2016年第8期1685-1692,共8页
supported by grants from the National Natural Science Foundation of China (30671178);the Shanxi Province Science Foundation for Youths, China (2014021029-2)
关键词 small heat shock proteins(sHSPs) expression characteristics semi-quantitative RT-PCR GUS staining rice
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