...1 讯号分类 连续与离散 (continuous and discrete) 偶 与奇 (even and odd) 周期与非周期 (Periodic and non-periodic) 决定与随机讯号 ..
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在此基础上，进一步对阵发放电的非稳定周期轨道分级进行了初步研究，检测到了显著的周期2与周期3轨道。
We also detected the orbits with higher periods, and highly significant unstable period 2 and period 3 orbits were identified.
与CK非洲E40相比，多毛可以显著降低棉蚜的取食周期E2，并可显著延长第1非取食周期和增加蚜虫口针的刺探频率。
As compared with CK (var. African E40) , the density of hairiness reduced the feeding time E2, and increased the 1st non-feeding time and penetration frequency.
在第二部分，我们将讨论软件测试生命周期，而在第三部分，重点是在软件测试生命周期的不同阶段与非功能性测试相关的活动。
In section 2, we discuss the software test lifecycle, and in section 3 the focus is on non-functional testing related activities on the different phases of the software test lifecycle.
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