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基于离散Legenda变换的Hamilton系统的变分算法和辛结构 被引量:1
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作者 夏丽莉 国忠金 张伟 《华中师范大学学报(自然科学版)》 CAS 北大核心 2017年第4期449-454,共6页
根据动量的不同表达式,给出3种不同的Legenda变换形式;得到3种不同形式的Hamilton系统的动力学方程;给出辛结构守恒的具体形式;二自由度非线性谐振子的例子验证基于离散变分原理的算法具有保系统的能量守恒量性质.
关键词 差分离散变分原理 离散legenda变换 变分算子
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The Myths behind Flower Names
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作者 白杰 《海外英语》 2014年第16期207-209,共3页
The Greek term for flower is Chloris. It is derived from the name of the Chloris, the goddess of vegetation, in Greek mythology, reasonably so, if we consider the great number of mythological tales linked to flowers o... The Greek term for flower is Chloris. It is derived from the name of the Chloris, the goddess of vegetation, in Greek mythology, reasonably so, if we consider the great number of mythological tales linked to flowers of the Greek flowers. The use of flowers was widespread in Greece from time immemorial, since flowers are so important to us from the moment we are born.Flowers play an important role in mythology. As they morph from bud to bloom to faded and wilted petals, they assume various meanings linked to youth, life and death. They are associated with goddesses and legends, and are often attributed with certain powers and symbolism. 展开更多
关键词 FLOWERS in MYTH FLOWER origins GREEK MYTHS legenda
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