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Search Results: 1 - 10 of 112602 matches for " LIU Yuan-Sheng "
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Relative Phase Dependence of Double Ionization in a Synthesized Laser Pulse

WANG Yuan-Sheng,XIA Chang-Long,GUO Jing,LIU Xue-Shen,

中国物理快报 , 2011,
Abstract:
REFLECTION AND TRANSMISSION CHARACTERISTICS OF PLANE WAVES AT THE INTERFACE INCLUDING CHIRAL MEDIA

LI ZHAN-JIE,XIONG YUAN-SHENG,LIU ZU LI,YAO KAI-LUN,

中国物理 B , 1997,
Abstract:
Spontaneous symmetry breaking of a Boseben Fermi mixture in a two-dimensional double-well potential

Wang Yuan-Sheng,Yan Pei-Gen,Li Bin,Liu Xue-Shen,

中国物理 B , 2012,
Abstract: We study the spontaneous symmetry breaking of a superfluid Bose-Fermi mixture in a two-dimensional double-well potential. The mixture is described by a set of coupled Gross-Pitaevskii equations. The symmetry breaking phenomenon is demonstrated in the two-dimensional double-well potential in the mixture. The results are summarized in the phase diagrams of the mixture particle numbers, which are divided into symmetric and asymmetric regions by the asymmetry ratios. The dynamical pictures of the spontaneous symmetry breaking induced by a gradual transformation of the single-well potential into a double-well one are also illustrated. The properties of the quantum degenerate mixture are explored using the realistic parameters for a 40K-87Rb system.
The Constitute, Geochronology and Geologic Evolution of the Kongling Complex,Western Hubei
冀西北地区晚太古代大陆地壳的增生和再造——同位素年代学证据

LIU Dun-yi,DI Yuan-sheng,SONG Biao,
刘敦一
,耿元生,宋彪

地球学报 , 1997,
Abstract: 冀西北地区出露的太古宙变质岩系是华北地台北缘麻粒岩相带的重要组成部分。详细的同位素地质年代学研究表明,本区古老的地壳形成于2900Ma左右,为玄武质成分。古老地壳的熔融再造作用主要有两期,一期发生在2780~2761Ma期间,产生了研究区西部广泛分布的英云闪长质片麻岩,另一期发生在2561~2503Ma期间,形成在宣化-赤城一带广泛分布的花岗闪长质片麻岩。此后,在2500~2400Ma期间发生了区域麻粒岩相变质改造,使部分岩石的同位素体系重新设置。
TOTAL REFLECTION CHARACTERISTICS OF PLANE WAVES AT THE INTERFACE INCLUDING A CHIRAL MEDIUM

LI ZHAN-JIE,XIONG YUAN-SHENG,LIU ZU-LI,YAO KAI-LUN,

中国物理 B , 1998,
Abstract:
Multiscale exploration for asymmetrical features on spatical distribution of earthquakes
地震活动空间分布不均匀性的多尺度分析

CHEN Shi-jun,MA Li,LIU Yuan-Sheng,
陈时军
,马丽 ,刘元生

地球物理学进展 , 2005,
Abstract: On the basis of space scale significance analysis method, the spacial distribution features of earthquakes in Eastern and Western mainland China, Taiwan region and New Zealand have been discussed. Results show that the distribution of events normally characterizes multiscale clustering and stochastic patterns. Within different bandwidths, results always show the distribution of events in Taiwan and New Zealand, where cover/close to boundaries of tectonic plates, more regularity than that in Eastern and Western mainland China. Also, the effects of bandwidth on features understanding of spacial distribution of events have been discussed in this paper.
Application of geophysical method to the precise positioning of urban seismic mobile moving fault
地球物理方法在城市地震活动断层精确定位中的应用

WU Zi-quan,LIU Yuan-Sheng,LIU Bao-jin,WANG Cheng-hua,
吴子泉
,刘元生,刘保金 ,王成虎

地球物理学进展 , 2005,
Abstract: This paper mainly discusses the precise positioning method for the urban seismic mobile moving fault, and the study results shows: the frequency sweeping method and the mutual correlation method of data processing can effectively suppress the disturbances from strong vibrations with the vibroseis in the strong-disturbance background in the city so as to carry out the seismic investigations in the urban area; for the sliding faults in which there is no clear fault displacements between the two beds, the high-resolution seismic prospecting method and electrical prospecting method can be used to position the fault precisely; finally, a case is used to demonstrate the precision positioning method based on the electrical prospecting.
Countermeasures and Characteristics of Beijing Urban Rainwater Utilization
北京市城区雨水利用及对策

ZUO Jian-bing,LIU Chang-ming,ZHENG Hong-xing,CHEN Yuan-sheng,
左建兵
,刘昌明,郑红星,陈远生

资源科学 , 2008,
Abstract: 世界范围内快速城市化进程所带来的缺水、水污染、洪涝等一系列问题,已经引起人们的广泛关注。实践证明实施雨水利用是解决城市水问题的有效手段。北京市属于人类活动强烈影响下的资源型重度缺水大都市,水问题可以概括为水少,水多,水脏。本文阐述了城市雨水利用的内涵,探讨了城市雨水利用的国内外研究进展。将北京市雨水利用分为3个发展阶段,起步探索阶段(1981年~1999年),深入研究与示范工程阶段(2000年~2005年),大范围推广实施阶段(2006年至今)。北京市2007年共完成267项新建雨水利用工程,雨水利用主要包括三大主要类型(集蓄、渗透、综合利用);空间分布特征表明,郊区多于城区,郊区以蓄水池为主,城区以入渗为主;成本效益分析结果表明动态收益/费用比值α(EV/PV=2.81)大于1.0,雨水利用综合效益非常显著。最后,通过对北京市雨水利用情况的分析,认为雨水利用过程中还存在“四多四少”问题,即行政命令多,市场调节少;利用的“点”多,“面”少;关注“量”多,“质”少;宣传多,规范少。因此,在今后的雨水利用中,需要加强经济杠杆调节的力度,注重雨水的联合利用和水质控制,完善雨水利用相关技术规范。
Hypocenter relocation in central and southern Jiangsu province and adjacent areas, China and its application to fault research
江苏中、南部及邻区地震重新定位及在断层研究中的应用

LIU Jian-da,LI Qing-he,ZHANG Yuan-sheng,JIN Shu-mei,
刘建达
,李清河,张元生,金淑梅

地球物理学进展 , 2009,
Abstract: The advantage and disadvantage of Double-Difference(DD) technique and Joint Hypocentral Determination(JHD) technique to locate earthquakes are analyzed. Combining above two methods and applying the Genetic Algorithm(GA) to optimization, we relocated the hypocenters in central and southern Jiangsu province and adjacent areas(29°~34°N, 117.5°~122.5°E) in East China. Firstly, we used GA for inversion to get crustal structure of the research area, then using DD to get precise relative locations for 58% original events, and last 42% events were located by GA. The relationship between events and the faults , the correlation of focus-depth and fault of Liyang M6.0 earthquake, southern Yellow Sea M6.2 earthquake, Changshu-Taicang M5.1 earthquake are discussed, the feature of focus-depth of the Changshu-Zhangjiagang swarm is analysed.
Applying the Multisim Technology to Teach the Course of High Frequency Power Amplifier
Gang Lv,Yuan-Sheng Xue
International Education Studies , 2011, DOI: 10.5539/ies.v4n1p122
Abstract: As one important professional base course in the electric information specialty, the course of “high frequency electronic circuit” has strong theoretical characteristic and abstract content. To enhance the teaching quality of this course, the computer simulation technology based on Multisim is introduced into the teaching of “high frequency electronic circuit”, which could not only deepen students’ understanding and memory of basic concepts, but also effectively help students to understand and grasp the principle of the high frequency circuit by the circuit design module and the simulation analysis function. The teaching application effect of the high frequency class C power amplifier has also proved that the Multisim software could realize the organic combination of theory and practice, and it is the profitable supplement of the traditional teaching mode.
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