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机械工程 概周期 Meanwhile, many phenomena such as chaotic and quasi-period movement that are not interpreted by linear theory appear and bring a lot of serious accidents. 使用中也出现了许多用传统的线性理论无法解释的现象(如混沌现象,概周期运动等),并导致了许多严重的事故。
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生物学 准周期 In this paper we attempt to find the possible coding patterns of Alu repeats with the quasi-period method. We compare the results with those of exon and intron sequences and find Alu repeats maybe use octamers as coding pattern. 本文我们首先尝试用准周期的方法在Alu序列中寻找可能的编码方式,并与外显子,内含子的分析结果进行对比,结果显示Alu序列可能具有8联体的编码方式。
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The mean foggy days of Yijun, Shiquan and xi 'an exist obvious interannual change, about quasi-period of 6, 8 years. 平均雾日较多的宜君、石泉和西安有较明显的年变化，大致有6年和8年的准周期。 - 2
It is found that there are two routes leading the response to chaos, the intermittence to chaos and quasi-period to ch aos. 研究发现，系统响应具有两条通向混沌的道路，即阵发性通向混沌的道路和拟周期通向混沌的道路。 - 3
Stiffness change has little effect on the critical instability and motion of the cracked-rotor, and the system motion is quasi-period motion. 裂纹转子轴刚度变化对油膜失稳点及油膜失稳之后转子的运动影响不大，转子系统作拟周期运动。
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