15:52 Feb 7, 2011 |
English to Chinese translations [PRO] Science - Mathematics & Statistics | |||||
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| Selected response from: James_xia China | ||||
Grading comment
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Summary of answers provided | ||||
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4 +4 | 拓扑孤子 |
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拓扑孤子 Explanation: 在场论中,孤子按照形成的“机理”有拓扑性孤子和非拓扑性孤子之分。 理想的平面波是在空间中无限延伸的,而一般地,由不同频率成分的平面波叠加而成的波包,由于色散而在空间中逐渐弥散,因此也不能完全在空间中局域。如果由于某种原因使得色散效应被抵消,从而波包形状被保持下来,此时便形成了一个孤子。在某些介质中就存在抵消色散效应的非线性效应,从而能形成非拓扑性孤子,例如水波孤子和光学孤子等。另外一种情形是,由于拓扑效应使得波包不会扩撒,从而形成拓扑性孤子,例如扭结。但两种都涉及非线性。 -------------------------------------------------- Note added at 1 day20 hrs (2011-02-09 12:25:59 GMT) Post-grading -------------------------------------------------- Also, I'd like to take this opportunity to extend my sincere gratitude to the colleagues including pkchan, Guo Feng, Sharon Toh and SophieT, for their kind and professtional help in building this term. Reference: http://www.changhai.org/bbs/load_article.php?fid=3&aid=11005... |
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