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Interactions among special embed-solitons for the (3+1)-dimensional Burgers equation 被引量:1
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作者 张雯婷 戴朝卿 陈未路 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第4期196-199,共4页
With the help of a modified mapping method and a new mapping method, we re-study the (3+1)-dimensional Burgers equation, and derive two families of variable separation solutions. By selecting appropriate functions ... With the help of a modified mapping method and a new mapping method, we re-study the (3+1)-dimensional Burgers equation, and derive two families of variable separation solutions. By selecting appropriate functions in the variable separation solution, we discuss the interaction behaviors among taper-like, plateau-type rings, and rectangle-type embed-solitons in the periodic wave background. All the interaction behaviors are completely elastic, and no phase shift appears after interaction. 展开更多
关键词 3+1)-dimensional Burgers equation modified mapping method interaction between special embed-solitons
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一类二阶段指派问题 被引量:2
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作者 林浩 林澜 《运筹与管理》 CSSCI CSCD 北大核心 2021年第2期97-101,共5页
经典的指派问题是研究资源与任务的二元匹配。作为推广,三维指派问题是研究资源、任务与作业的三元匹配。前者已有成熟的有效算法,后者是著名的NP困难问题。本文讨论介于二者之间的一类二阶段指派问题,即可分解为二阶段决策的特殊三维... 经典的指派问题是研究资源与任务的二元匹配。作为推广,三维指派问题是研究资源、任务与作业的三元匹配。前者已有成熟的有效算法,后者是著名的NP困难问题。本文讨论介于二者之间的一类二阶段指派问题,即可分解为二阶段决策的特殊三维匹配问题,给出多项式时间算法。 展开更多
关键词 组合最优化 指派问题 二阶段指派问题 特殊三维匹配
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Special hybrid stress element for stress analyses around circular cutouts in laminated composites 被引量:6
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作者 田宗漱 赵奉东 田铮 《Science China(Technological Sciences)》 SCIE EI CAS 2001年第5期531-541,共11页
A 3-dimensional hybrid stress element with a traction-free cylindrical surface based on amodified complementary energy principle has been derived for efficient and accurate analysis of stressconcentration around circu... A 3-dimensional hybrid stress element with a traction-free cylindrical surface based on amodified complementary energy principle has been derived for efficient and accurate analysis of stressconcentration around circular cutouts in thin to thick laminated composites. New expressions of sixstress components are developed by using three stress-functions in cylindrical co-ordinates, so that thehomogeneous equilibrium equations, the interlayer surface transverse-stresses and the traction-freeboundary condition on the cylindrical surface are satisfied exactly, while the interelement traction conti-nuity has been relaxed via the Lagrange multiplier method. Transverse-shear deformation effects areincorporated in each layer with displacement continuity enforced along interlayer surface. Selected ex-amples are used to demonstrate the efficiency and accuracy of the present special element. 展开更多
关键词 LAMINATED composites CIRCULAR cutouts special hybrid STRESS element 3-dimensional STRESS analysis.
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