In previous studies on plasma-particle interaction, as far as we know, the rf plasma flow and temperature fields are all simulated by the non-self-consistent one-dimensional electromagnetic (1-D EM) field model. In th...In previous studies on plasma-particle interaction, as far as we know, the rf plasma flow and temperature fields are all simulated by the non-self-consistent one-dimensional electromagnetic (1-D EM) field model. In the present paper, the complete self-consistent two-dimensional electromagnetic (2-D EM) field model in- corporating the axial Lorentz force component, which is neglected in the 1-D model, is firstly adopted to calculate the aluminium particle trajectory and thermal history in atmospheric rf Ar plasma with the particle evaporation effect included. The cru- cial effect of reverse flow within the coil region on the particle trajectory is discovered and the results show that the 2-D EM field model must be adopted instead of the 1-D model when the plasma-particle interaction is studied. The effect of carrier gas flux on the particle movement and heating are also studied, resulting in some useful conclusions for both plasma theory and application.展开更多
A detailed study on geomorphic surfaces and a set of trenches on the Hohhot segment of Daqingshan piedmont fault at three sites, Kuisu, Ulan Blang, and Qingshan Grassland, revealed 7 paleoseismic events occurred along...A detailed study on geomorphic surfaces and a set of trenches on the Hohhot segment of Daqingshan piedmont fault at three sites, Kuisu, Ulan Blang, and Qingshan Grassland, revealed 7 paleoseismic events occurred along the fault segment since 19 ka BP. Those events occurred at 18.75±.75 ka, 16.97 ±.96 ka, 14.65±.67 ka, 11.82±.69 ka, 9.45±.26 ka, 6. 83±.26 ka, and 4. 50 ±0. 23 ka BP, respectively, and their average recurrence interval is 2375±432 years. From the results of constraining fault displacement and correlation between the sediments in these trenches, we found a complete paleoseismic activity history along the fault segment during this period of time.展开更多
The steady and sound development of colleges and universities cannot go without the adoption of ecological thinking.However,the current construction of campus culture is disrupted by such prominent problems as insular...The steady and sound development of colleges and universities cannot go without the adoption of ecological thinking.However,the current construction of campus culture is disrupted by such prominent problems as insular ecological ethics,utilitarian talent cultivation pattern,poor academic atmosphere and distortion of values,hindering the rapid development of colleges and universities.Integrating the concept of ecological culture into the construction of campus culture and turning it into the mainstream culture serve as effective pathways to solve these problems and realize their mission of inheriting and passing on civilization.Advocating the harmony between man and nature,Natural History education is in line with ecological development concept and is an integral part of education on ecological pro-gress.The integration of Natural History education into the traditional education system in institutions of higher learning is conducive to educational diversity,cultivation of ecological awareness among students and transmission of socialist core values.College ecological culture can be better cultivated by establishing Natural History clubs,opening Natural History courses,carrying out ecological ethic education and implementing cultural communication on schools within the community.展开更多
文摘In previous studies on plasma-particle interaction, as far as we know, the rf plasma flow and temperature fields are all simulated by the non-self-consistent one-dimensional electromagnetic (1-D EM) field model. In the present paper, the complete self-consistent two-dimensional electromagnetic (2-D EM) field model in- corporating the axial Lorentz force component, which is neglected in the 1-D model, is firstly adopted to calculate the aluminium particle trajectory and thermal history in atmospheric rf Ar plasma with the particle evaporation effect included. The cru- cial effect of reverse flow within the coil region on the particle trajectory is discovered and the results show that the 2-D EM field model must be adopted instead of the 1-D model when the plasma-particle interaction is studied. The effect of carrier gas flux on the particle movement and heating are also studied, resulting in some useful conclusions for both plasma theory and application.
基金The research as one of the key project was supported by Joint Seismological Science Foundation grant 95-07-421. Contribution No. 2001 B001, Institute of Geology, China Seismological Bureau, China.
文摘A detailed study on geomorphic surfaces and a set of trenches on the Hohhot segment of Daqingshan piedmont fault at three sites, Kuisu, Ulan Blang, and Qingshan Grassland, revealed 7 paleoseismic events occurred along the fault segment since 19 ka BP. Those events occurred at 18.75±.75 ka, 16.97 ±.96 ka, 14.65±.67 ka, 11.82±.69 ka, 9.45±.26 ka, 6. 83±.26 ka, and 4. 50 ±0. 23 ka BP, respectively, and their average recurrence interval is 2375±432 years. From the results of constraining fault displacement and correlation between the sediments in these trenches, we found a complete paleoseismic activity history along the fault segment during this period of time.
基金Key Research Projects of Humanities and Social Sciences in Anhui Universities in 2019(SK2019A0943)
文摘The steady and sound development of colleges and universities cannot go without the adoption of ecological thinking.However,the current construction of campus culture is disrupted by such prominent problems as insular ecological ethics,utilitarian talent cultivation pattern,poor academic atmosphere and distortion of values,hindering the rapid development of colleges and universities.Integrating the concept of ecological culture into the construction of campus culture and turning it into the mainstream culture serve as effective pathways to solve these problems and realize their mission of inheriting and passing on civilization.Advocating the harmony between man and nature,Natural History education is in line with ecological development concept and is an integral part of education on ecological pro-gress.The integration of Natural History education into the traditional education system in institutions of higher learning is conducive to educational diversity,cultivation of ecological awareness among students and transmission of socialist core values.College ecological culture can be better cultivated by establishing Natural History clubs,opening Natural History courses,carrying out ecological ethic education and implementing cultural communication on schools within the community.
