图像意义的构建分析是多模态话语分析研究的重点之一。kress g. ＆ van leeuwen t.提出的视觉语法是图像意义研究的重要理论基础。针对杂志封面分析其图像意义的构建，丰富了多模态语篇的研究，拓展了多模态话语分析的领域，提高读者的...图像意义的构建分析是多模态话语分析研究的重点之一。kress g. ＆ van leeuwen t.提出的视觉语法是图像意义研究的重要理论基础。针对杂志封面分析其图像意义的构建，丰富了多模态语篇的研究，拓展了多模态话语分析的领域，提高读者的话语识读能力，帮助设计者科学地选择和协调杂志封面的各种模态，从而达到最佳设计效果。展开更多
The modulational instability, quantum breathers and two-breathers in a frustrated easy-axis ferromagnetic zig-zag chain under an external magnetic field are investigated within the Hartree approximation. By means of a...The modulational instability, quantum breathers and two-breathers in a frustrated easy-axis ferromagnetic zig-zag chain under an external magnetic field are investigated within the Hartree approximation. By means of a linear stability analysis, we analytically study the discrete modulational instability and analyze the effect of the frustration strength on the discrete modulational instability region. Using the results from the discrete modulational instability analysis, the presence conditions of those stationary bright type localized solutions are presented. On the other hand, we obtain the analytical expressions for the stationary bright localized solutions and analyze the effect of the frustration on their emergence conditions. By taking advantage of these bright type single-magnon bound wave functions obtained, quantum breather states in the present frustrated ferromagnetic zig-zag lattice are constructed. What is more, the analytical forms for quantum two-breather states are also obtained. In particular, the energy level formulas of quantum breathers and two-breathers are derived.展开更多
文摘图像意义的构建分析是多模态话语分析研究的重点之一。kress g. ＆ van leeuwen t.提出的视觉语法是图像意义研究的重要理论基础。针对杂志封面分析其图像意义的构建，丰富了多模态语篇的研究，拓展了多模态话语分析的领域，提高读者的话语识读能力，帮助设计者科学地选择和协调杂志封面的各种模态，从而达到最佳设计效果。
基金Project supported by the National Natural Science Foundation of China(Grant No.11604121)the Scientific Research Fund of Hunan Provincial Education Department,China(Grant Nos.16B210 and 16A170)the Natural Science Fund Project of Jishou University,China(Grant No.jdx17036)
文摘The modulational instability, quantum breathers and two-breathers in a frustrated easy-axis ferromagnetic zig-zag chain under an external magnetic field are investigated within the Hartree approximation. By means of a linear stability analysis, we analytically study the discrete modulational instability and analyze the effect of the frustration strength on the discrete modulational instability region. Using the results from the discrete modulational instability analysis, the presence conditions of those stationary bright type localized solutions are presented. On the other hand, we obtain the analytical expressions for the stationary bright localized solutions and analyze the effect of the frustration on their emergence conditions. By taking advantage of these bright type single-magnon bound wave functions obtained, quantum breather states in the present frustrated ferromagnetic zig-zag lattice are constructed. What is more, the analytical forms for quantum two-breather states are also obtained. In particular, the energy level formulas of quantum breathers and two-breathers are derived.
