We experimentally demonstrate the relation of Raman coupling strength with the external bias magnetic field in degenerate Fermi gas of 40K atoms. Two Raman lasers couple two Zeeman energy levels, whose energy splittin...We experimentally demonstrate the relation of Raman coupling strength with the external bias magnetic field in degenerate Fermi gas of 40K atoms. Two Raman lasers couple two Zeeman energy levels, whose energy splitting depends on the external bias magnetic field. The Raman coupling strength is determined by measuring the Rabi oscillation frequency. The characteristics of the Rabi oscillation is to be damped after several periods due to Fermi atoms in different momentum states oscillating with different Rabi frequencies. The experimental results show that the Raman coupling strength will decrease as the external bias magnetic field increases, which is in good agreement with the theoretical prediction.展开更多
In view of the recognition of the importance of the interdependent behavior of strength and stiffness of walltype structural elements,the seismic demand of plan-asymmetric systems is revisited.Useful strength distribu...In view of the recognition of the importance of the interdependent behavior of strength and stiffness of walltype structural elements,the seismic demand of plan-asymmetric systems is revisited.Useful strength distribution strategies,i.e.,＇Center of Strength-Center of Mass（CV-CM） coinciding＇ and ＇Balanced Center of Strength-Center of Resistance（CVCR）＇ are adopted.Design charts for the seismic demand of classical uni-directionally and bi-directionally asymmetric systems are developed in a simple unified format.A conceptual framework is also outlined to conveniently apply the design charts.Illustrations are included to explain the use of the current recommendations in practical design.The study also highlights the relative performance of ＇CV-CM coinciding＇ and ＇Balanced CV-CR＇ criteria.展开更多
In this paper, the definition of approximate XFDs based on value equality is proposed. Two metrics, sup port and strength, are presented for measuring the degree of approximate XFD. A basic algorithm is designed for e...In this paper, the definition of approximate XFDs based on value equality is proposed. Two metrics, sup port and strength, are presented for measuring the degree of approximate XFD. A basic algorithm is designed for extracting minimal set of approximate XFDs, and then two optimized strategies are proposed to improve the performance. Finally, the experimental results show that the optimized algorithms are correct and effective.展开更多
我刚刚离异,六岁的儿子跟我,我们孤儿寡女将度过漫长的余生。近日上网读到此文,相见恨晚！本文的中心思想:A successful marriage is one thathas maintained a high level of affection right from the start。我由此想到了一句著名英...我刚刚离异,六岁的儿子跟我,我们孤儿寡女将度过漫长的余生。近日上网读到此文,相见恨晚！本文的中心思想:A successful marriage is one thathas maintained a high level of affection right from the start。我由此想到了一句著名英谚:A good beginning is half the battle。我想,婚姻似乎可以套用此英谚:Ahappy beginning is half the marriage！我特别敬佩的是本文分析:漫长恋爱及短暂恋爱的夫妇们将headed for the rockiest road！我属于前者,我和我的夫君恋爱6年。真累！为什么?此文之剖析一针见血: …but because they have real problems in the relationship that they’re tryingto put aside in order to marry。 读者朋友,我的教训非常惨烈,当你堕入爱河之时,彼此若不能in tune(合调子)with each other,那么,就赶快分手吧！】展开更多
基金Supported by the National Basic Research Program of China under Grant No 2011CB921601the National Natural Science Foundation of China under Grant Nos 11234008,11361161002 and 11222430the Program for Sanjin Scholars of Shanxi Province
文摘We experimentally demonstrate the relation of Raman coupling strength with the external bias magnetic field in degenerate Fermi gas of 40K atoms. Two Raman lasers couple two Zeeman energy levels, whose energy splitting depends on the external bias magnetic field. The Raman coupling strength is determined by measuring the Rabi oscillation frequency. The characteristics of the Rabi oscillation is to be damped after several periods due to Fermi atoms in different momentum states oscillating with different Rabi frequencies. The experimental results show that the Raman coupling strength will decrease as the external bias magnetic field increases, which is in good agreement with the theoretical prediction.
文摘In view of the recognition of the importance of the interdependent behavior of strength and stiffness of walltype structural elements,the seismic demand of plan-asymmetric systems is revisited.Useful strength distribution strategies,i.e.,＇Center of Strength-Center of Mass（CV-CM） coinciding＇ and ＇Balanced Center of Strength-Center of Resistance（CVCR）＇ are adopted.Design charts for the seismic demand of classical uni-directionally and bi-directionally asymmetric systems are developed in a simple unified format.A conceptual framework is also outlined to conveniently apply the design charts.Illustrations are included to explain the use of the current recommendations in practical design.The study also highlights the relative performance of ＇CV-CM coinciding＇ and ＇Balanced CV-CR＇ criteria.
基金Supported by the National Natural Science Foun-dation of China (60173051) , Teaching and Research Award Programfor Outstanding Young Teachers in Higher Education Institution ofthe Ministry of Education,the National Research Foundation for theDoctoral Programof Higher Education of China(20030145029) ,andthe Natural Science Foundationfor Doctoral Career Award of LiaoningProvince(20041016)
文摘In this paper, the definition of approximate XFDs based on value equality is proposed. Two metrics, sup port and strength, are presented for measuring the degree of approximate XFD. A basic algorithm is designed for extracting minimal set of approximate XFDs, and then two optimized strategies are proposed to improve the performance. Finally, the experimental results show that the optimized algorithms are correct and effective.
文摘我刚刚离异,六岁的儿子跟我,我们孤儿寡女将度过漫长的余生。近日上网读到此文,相见恨晚！本文的中心思想:A successful marriage is one thathas maintained a high level of affection right from the start。我由此想到了一句著名英谚:A good beginning is half the battle。我想,婚姻似乎可以套用此英谚:Ahappy beginning is half the marriage！我特别敬佩的是本文分析:漫长恋爱及短暂恋爱的夫妇们将headed for the rockiest road！我属于前者,我和我的夫君恋爱6年。真累！为什么?此文之剖析一针见血: …but because they have real problems in the relationship that they’re tryingto put aside in order to marry。 读者朋友,我的教训非常惨烈,当你堕入爱河之时,彼此若不能in tune(合调子)with each other,那么,就赶快分手吧！】
