本文给出了有限域上多项式的友矩阵的某些性质，及其在计算线性移位寄存器序列的周期和循环码的最小长度的应用。
This paper gives some properties of companion matrix of polynomial over finite field with its application for evaluating period of linear shift register sequence and minimal length of cyclic code.
茧丝纤度曲线的预测研究茧丝纤度曲线可视为是长度有限且随机变动的非平稳时间序列。
Size curves of cocoon filaments can be regarded as non-stationary time series with finite length varying at random.
根据拓扑熵的定义公式，用逆像点个数的方法找到了有限长度超稳揉序列词的拓扑熵的差分关系式。 该函数关系式直接依赖于揉序列词。
According to the definition of topological entropy, a new method of calculating topological entropy is found, which directly depends on the kneading sequence or word.
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