A five-level oceanic primitive equation model has been developed. This model is integrated numerically with annual mean wind stress and heat flux at sea surface for 30 a. The ocean circulations tend to quasi-stability...A five-level oceanic primitive equation model has been developed. This model is integrated numerically with annual mean wind stress and heat flux at sea surface for 30 a. The ocean circulations tend to quasi-stability. The simulated results show that the computed annual mean currents and sea surface temperature agree well with the observations.展开更多
Discerning electromagnetically induced transparency(EIT) from Autler–Townes splitting(ATS) is a significant issue in quantum optics and has attracted wide attention in various three-level configurations. Here we pres...Discerning electromagnetically induced transparency(EIT) from Autler–Townes splitting(ATS) is a significant issue in quantum optics and has attracted wide attention in various three-level configurations. Here we present a detailed study of EIT and ATS in a five-level atomic system considered to be composed of a four-level Y-type subsystem and a three-level Λ-type subsystem. In our theoretical calculations with standard density matrix formalism and steadystate approximation, we obtain the general analytical expression of the first-order matrix element responsible for the probe-field absorption. In light of the well-known three-level EIT and ATS criteria, we numerically show an intersection of EIT with ATS for the Y-type subsystem. Furthermore, we show that an EIT dip is sandwiched between two ATS dips(i.e., multi-dip mixture of EIT and ATS) in the absorption line for the five-level system, which can be explained by the dressed-state theory and Fano interference.展开更多
We theoretically investigate the phenomena of electromagnetically induced grating in an M-type five-level atomic system. It is found that a weak field can be effectively diffracted into high-order directions using a s...We theoretically investigate the phenomena of electromagnetically induced grating in an M-type five-level atomic system. It is found that a weak field can be effectively diffracted into high-order directions using a standing wave coupling field, and different depths of the phase modulation can disperse the diffraction light into different orders. When the phase modulation depth is approximated to the orders of π, 2π and 3π, the first-, second- and third-order diffraction intensity reach the maximum, respectively. Thus we can take advantage of the phase modulation to control the probe light dispersing into the required high orders.展开更多
香蕉作为热带水果,在我国农民致富和乡村振兴中扮演着重要的角色。“十二五”是我国全面建设小康社会的关键期,文章从“十二五”规划提出至今,通过CNKI(CNKI收录硕士、博士论文文献、期刊论文)、维普网、Citexs(数据来源于PubMed数据库)...香蕉作为热带水果,在我国农民致富和乡村振兴中扮演着重要的角色。“十二五”是我国全面建设小康社会的关键期,文章从“十二五”规划提出至今,通过CNKI(CNKI收录硕士、博士论文文献、期刊论文)、维普网、Citexs(数据来源于PubMed数据库)、Web of Science(SCI)、国家统计局、国家香蕉产业体系平台、智慧三农等进行文献、数据查询,对我国“十二五”以来香蕉产业发展现状、热带农业政策、研究单位、研究方向、基金来源等进行分析。结果显示:“十二五”规划以来,中国香蕉产业呈现出整体良好的发展态势,产量呈现一定波动增长态势;在研究领域上积累了丰富的种质资源;在香蕉病虫害、保鲜、加工方面具有显著研究成果。此外,“十二五”以来支撑香蕉产业科技项目基金渠道更多且资金量增加,香蕉领域的科研成果为我国香蕉产业的发展提供了科技支撑。展开更多
文摘A five-level oceanic primitive equation model has been developed. This model is integrated numerically with annual mean wind stress and heat flux at sea surface for 30 a. The ocean circulations tend to quasi-stability. The simulated results show that the computed annual mean currents and sea surface temperature agree well with the observations.
基金Supported by the National Natural Science Foundation of China under Grant Nos.11274132,11547208the Science Foundation of China Three Gorges University
文摘Discerning electromagnetically induced transparency(EIT) from Autler–Townes splitting(ATS) is a significant issue in quantum optics and has attracted wide attention in various three-level configurations. Here we present a detailed study of EIT and ATS in a five-level atomic system considered to be composed of a four-level Y-type subsystem and a three-level Λ-type subsystem. In our theoretical calculations with standard density matrix formalism and steadystate approximation, we obtain the general analytical expression of the first-order matrix element responsible for the probe-field absorption. In light of the well-known three-level EIT and ATS criteria, we numerically show an intersection of EIT with ATS for the Y-type subsystem. Furthermore, we show that an EIT dip is sandwiched between two ATS dips(i.e., multi-dip mixture of EIT and ATS) in the absorption line for the five-level system, which can be explained by the dressed-state theory and Fano interference.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11274112 and 11474092the Key Project of Shanghai Municipal Education Commission under Grant No 14ZZ056+1 种基金the Shanghai Natural Science Fund Project under Grant No14ZR1410300the Key Research Project of Henan Province Education Department under Grant No 13A140818
文摘We theoretically investigate the phenomena of electromagnetically induced grating in an M-type five-level atomic system. It is found that a weak field can be effectively diffracted into high-order directions using a standing wave coupling field, and different depths of the phase modulation can disperse the diffraction light into different orders. When the phase modulation depth is approximated to the orders of π, 2π and 3π, the first-, second- and third-order diffraction intensity reach the maximum, respectively. Thus we can take advantage of the phase modulation to control the probe light dispersing into the required high orders.
文摘香蕉作为热带水果,在我国农民致富和乡村振兴中扮演着重要的角色。“十二五”是我国全面建设小康社会的关键期,文章从“十二五”规划提出至今,通过CNKI(CNKI收录硕士、博士论文文献、期刊论文)、维普网、Citexs(数据来源于PubMed数据库)、Web of Science(SCI)、国家统计局、国家香蕉产业体系平台、智慧三农等进行文献、数据查询,对我国“十二五”以来香蕉产业发展现状、热带农业政策、研究单位、研究方向、基金来源等进行分析。结果显示:“十二五”规划以来,中国香蕉产业呈现出整体良好的发展态势,产量呈现一定波动增长态势;在研究领域上积累了丰富的种质资源;在香蕉病虫害、保鲜、加工方面具有显著研究成果。此外,“十二五”以来支撑香蕉产业科技项目基金渠道更多且资金量增加,香蕉领域的科研成果为我国香蕉产业的发展提供了科技支撑。
