Petrified wood fossils are known for their exquisite colour and some pieces of petrified wood have retained the original cellular structure of the wood.
木化石往往以其精美的色泽闻名于世，某些木化石甚至还保留有原始木材的细胞结构。
Chaos is a phenomenon by inherent exquisite structure. Some improving schemes are brought out based on discussing the chaos algorithm, and are simulated by usual optimizing function.
混沌是有着精致内在结构的一类现象。本文通过在对一种混沌算法进行讨论的基础上，提出一些改进措施，并利用常用寻优函数进行仿真验证。
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