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现代相机自动测光系统及自动曝光功能阐释 被引量:2
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作者 关文俊 《哈尔滨师范大学自然科学学报》 CAS 1999年第4期79-82,共4页
本文比较详细地介绍了当前自动曝光相机的测光功能 ,并着重介绍几种较先进的测光系统 .该文对摄影理论教学及摄影实践教学具有参考价值 .对从事摄影工作的专职人员在实际拍摄过程中或摄影艺术创作中 。
关键词 自动测光系统 相机 自动曝光 曝光量
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An Eight Component Integrable Hamiltonian Hierarchy from a Reduced Seventh-Order Matrix Spectral Problem
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作者 Savitha Muthanna Wen-Xiu Ma 《Journal of Applied Mathematics and Physics》 2024年第6期2102-2111,共10页
We present an eight component integrable Hamiltonian hierarchy, based on a reduced seventh order matrix spectral problem, with the aim of aiding the study and classification of multicomponent integrable models and the... We present an eight component integrable Hamiltonian hierarchy, based on a reduced seventh order matrix spectral problem, with the aim of aiding the study and classification of multicomponent integrable models and their underlying mathematical structures. The zero-curvature formulation is the tool to construct a recursion operator from the spatial matrix problem. The second and third set of integrable equations present integrable nonlinear Schrödinger and modified Korteweg-de Vries type equations, respectively. The trace identity is used to construct Hamiltonian structures, and the first three Hamiltonian functionals so generated are computed. 展开更多
关键词 Matrix Spectral Problem Zero Curvature Equation Lax Pair Integrable Hierarchy NLS Equations mKdV Equations Hamiltonian Structure Lie bracke
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