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庞加莱的力学：阐明焦点圆锥域中隐藏的对称性The power of Poincare: Elucidating the hidden symmetries in focal conic domains |
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| 课程网址: | http://videolectures.net/clc2010_kamien_tpop/ |
| 主讲教师: | Randall D. Kamien |
| 开课单位: | 宾夕法尼亚大学 |
| 开课时间: | 2010-08-05 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Focal conic domains are typically the ``smoking gun'' by which smectic liquid crystalline phases are identified. The geometry of the equally-spaced smectic layers is highly generic but, at the same time, difficult to work with. In this talk we develop an approach to the study of focal sets in smectics which exploits a hidden Poincare symmetry revealed only by viewing the smectic layers as projections from one-higher dimension. We use this perspective to shed light upon several classic focal conic textures, including the concentric cyclides of Dupin, polygonal textures and tilt-grain boundaries. |
| 关 键 词: | 庞加莱力学; 液晶; 对称 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-01-21：chenxin |
| 阅读次数: | 91 |