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Search Results: 1 - 10 of 102760 matches for " CHEN Ying-Long "
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Theoretical investigation on level structure of 1s inner-shell excited state and the related decay property of C Ⅱ ion
C Ⅱ离子1s内壳层激发态的结构和衰变特性的理论研究

Shi Ying-Long,Dong Chen-Zhong,
师应龙
,董晨钟

物理学报 , 2009,
Abstract: 在相对论多组态Dirac-Fock理论方法基础上,通过系统考虑电子关联效应、弛豫效应以及相对论高阶修正,详细研究了C Ⅱ离子1s-2p光激发形成的内壳层电子激发态(1s2s22p2和1s2s2p3)、辐射和Auger末态的能级结构以及各种可能的衰变过程.计算了C Ⅱ离子1s内壳层光激发能量、辐射和Auger衰变率及其线宽,进一步由不确定关系推出了这些激发态的能级寿命,并与最新的实验结果和已有的理论结果进行了比较.
A bistable, self-latching inverter by the monolithic integration of resonant tunnelling diode and high electron mobility transistor

Ma Long,Huang Ying-Long,Zhang Yang,Yang Fu-Hua,Wang Liang-Chen,

中国物理 B , 2006,
Abstract:
Cascade decays and final charge-state distribution of single K-vacancy and double K-vacancy magnesium ions
单、双洞态镁离子的退激发及末电离态离子分布的研究

Hu Hong-Wei,Dong Chen-Zhong,Shi Ying-Long,
胡宏伟
,董晨钟,师应龙

物理学报 , 2007,
Abstract: Based on the conclusion that the contribution of correlated decay of two vacancies in atoms is small,the de-excitation process of Mg 1 (1s-1)hollow magnesium ions with single K-vacancy and Mg 2 (1s-2)double K-vacancy were treated by applying the radiative-single Auger-double Auger cascade model(RACDA).The final-charge-state distribution(FCSD)of these hollow ions were calculated,and compared with that obtained with the radiative-single Auger cascade model(RAC).The probability of tetravalent ion production via the de-excitation of Mg 1 (1s-1)obtained by RACDA model is considerable,but tetravalent ion is not produced in the by RAC model.The probability of hexavalent ion production via the de-excitation of Mg 2 (1s-2)obtained by RACDA model is very large,but hexavalent ion is not produced in the RAC model.
KLL dielectronic recombination process of He-like to O-like xenon ions

Zhang Deng-Hong,Shi Ying-Long,Jiang Jun,Dong Chen-Zhong,Fumihiro Koike,

中国物理 B , 2012,
Abstract: In this work, the KLL dielectronic recombination (DR) processes of highly charged He-like to O-like xenon ions are studied systematically by using a DR program, which is based on the multi-configuration Dirac-Fock (MCDF) method. The KLL DR resonant energies and the corresponding resonant strengths are calculated, asizing especially the effect of the Breit interaction on the DR strengths. The theoretical KLL DR spectra are obtained and compared with the latest experimental results obtained in the Shanghai Electron Beam Ion Trap.
Biomechanical behaviors of dragonfly wing: relationship between configuration and deformation

Ren Huai-Hui,Wang Xi-Shu,Chen Ying-Long,Li Xu-Dong,

中国物理 B , 2012,
Abstract: In this paper, the natural structures of a dragonfly wing, including the corrugation of the chordwise cross-section, the sandwich microstructure veins, and the junctions between the vein and the membrane, have been investigated with experimental observations, and the morphological parameters of these structural features are measured. The experimental result indicates that the corrugated angle among the longitudinal veins ranges from 80° to 150°, and the sandwiched microstructure vein mainly consists of chitin and protein layers. Meanwhile, different finite element models, which include models I and I* for the planar forewings, models II and II* for the corrugated forewings, and a submodel with solid veins and membranes, are created to investigate the effects of these structural features on the natural frequency/modal, the dynamical behaviors of the flapping flight, and the deformation mechanism of the forewings. The numerical results indicate that the corrugated forewing has a more reasonable natural frequency/modal, and the first order up-down flapping frequency of the corrugated wing is closer to the experimental result (about 27.00 Hz), which is significantly larger than that of the planar forewing (10.94 Hz). For the dynamical responses, the corrugated forewing has a larger torsional angle than the planar forewing, but a lower flapping angle. In addition, the sandwich microstructure veins can induce larger amplitudes of torsion deformation, because of the decreasing stiffness of the whole forewing. For the submodel of the forewing, the average stress of the chitin layer is much larger than that of the protein layer in the longitudinal veins. These simulative methods assist us to explain the flapping flight mechanism of the dragonfly and to design a micro aerial vehicle by automatically adjusting the corrugated behavior of the wing.
Graph-based Multi-relations Data Mining Fundamental Research and Application
基于图的多关系数据挖掘理论研究与方法

WANG Ying-long,SONG Ze-feng,CHEN Zhuo,
王映龙
,宋泽锋,陈卓

计算机科学 , 2008,
Abstract: 在过去的几年,结构化数据挖掘的需求日渐兴起,图是计算机学科和离散数学中最好的结构数据研究之一,基于图的数据挖掘已越来越广泛.本文介绍了基于图的数据挖掘的理论基础及其研究方法.
Advances in studies of edible mycorrhizal fungi
菌根食用菌研究进展

TANG Chao,CHEN Ying-Long,LIU Run-Jin,
唐超
,陈应龙,刘润进

菌物学报 , 2011,
Abstract: Edible mycorrhizal fungi (EMF) play a vital role in forest ecosystem and generally have nutritional, economic and ecological values. This report summarizes current advances in the study of EMF with particular references to China. Topics covered in this review include resource distribution and utilization, physiological and ecological functioning of EMF, as well as advanced techniques in fungal domestication and cultivation. Opportunities and challenges in the development of EMF in China, and global hotspots in research and development of EMF, are discussed.
Diversity of AM fungi associated with the common tropical tree species in Wuzhi Mountain of Hainan Island, China
五指山常见热带树种的丛枝菌根真菌多样性

SHI Zhao-Yong,WANG Fa-Yuan,CHEN Ying-Long,
石兆勇
,王发园,陈应龙

生态学报 , 2007,
Abstract: Arbuscular mycorrhizal (AM) status and diversity of AM fungi were investigated on 10 indigenous tropical tree species at Wuzhi Mountain, central Hainan Island, China. All 10 plant taxa investigated were colonized by AM fungi, while the infective rates varied from 21.8 % to 90.5 % with a mean of 51.5 %. Arbuscules and vesicles were observed in all collected tree samples. A total of thirty-six AM fungi belonging to 4 genera, Acaulospora, Glomus, Gigaspora and Scutellospora were isolated from the rhizosphere of trees. Glomus was the most popular and dominant genus, closely followed by Acaulospora, and then Scutellospora. The highest spore density (7.32) was found in the soils of Swietenia macrophylla, while soils from the rhizosphere of Machilus namu were highest in species richness (5.37) and diversity index (1.6548) of AM fungi. A relationship between the frequency of occurrence and diversity of AM fungi and the elevation of the sampling sites for Swietenia macrophylla was observed. The elevation significantly affected the frequency of occurrence and diversity of Gigaspora and Scutellospora, but showed no significant influence to Glomus and Acaulospora.
Theoretical study on the dielectronic recombination of highly charged mercury and uranium ions
高离化态Hg和U离子的双电子复合过程的理论研究

Shi Ying-Long,Dong Chen-Zhong,Zhang Deng-Hong,Fu Yan-Biao,
师应龙
,董晨钟,张登红,符彦飙

物理学报 , 2008,
Abstract: Based on the multiconfiguration Dirac-Fock method, with the recently developed program for the calculation of cross section of dielectronic recombination (DR), the KLL DR process of highly charged mercury and uranium ions from helium-like to boron-like have been systematically studied. For Hg ions, the contributions to the level of doubly excited state from Breit effect and quantum electrodynamic (QED) effect, KLL DR resonant energies, total line width and corresponding DR resonant strength have been calculated and analyzed. A good overall agreement was found between the present calculations and the previous theoretical and experimental result. Based on the calculation of Hg ions, the KLL DR process of highly charged uranium ions was studied theoretically. The comparison of present results with the other theoretical and experimental results has been made.
Theoretical study on the dielectronic recombination of highly charged mercury and uranium ions
高离化态Hg和U离子的双电子复合过程的理论研究

Shi Ying-Long,Dong Chen-Zhong,Zhang Deng-Hong,Fu Yan-Biao,
师应龙
,董晨钟,张登红,符彦飙

中国物理 B , 2008,
Abstract: Based on the multiconfiguration Dirac-Fock method, with the recently developed program for the calculation of cross section of dielectronic recombination (DR), the KLL DR process of highly charged mercury and uranium ions from helium-like to boron-like have been systematically studied. For Hg ions, the contributions to the level of doubly excited state from Breit effect and quantum electrodynamic (QED) effect, KLL DR resonant energies, total line width and corresponding DR resonant strength have been calculated and analyzed. A good overall agreement was found between the present calculations and the previous theoretical and experimental result. Based on the calculation of Hg ions, the KLL DR process of highly charged uranium ions was studied theoretically. The comparison of present results with the other theoretical and experimental results has been made.
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