Among Maimon's more controversial findings is the correlation between the number of foreign students logged into the college network and the frequency and origin of the cyber attacks.

麦农更具争议的结果之一是众多外国学生登录到大学网络与网络攻击频率和来源的相关性。

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Objective: To study the origin of Sichuan Yi ethnic group according to human leukocyte antigen(HLA)-B gene frequency.

目的：根据人类白细胞抗原（HLA）-B基因频率，探讨四川彝族的民族起源。

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BackgroundCardiac arrhythmia is the abnormal of the heart's frequency and rhythms, impulse, conduction velocity and the origin of the excited order.

背景心律失常是指心脏冲动的频率、节律、起源部位、传导速度与激动次序的异常。

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The WDCS says the frequency ranges of some noise sources of human origin may be blotting out other, biologically important sounds, preventing mothers and calves from staying in touch and masking sound cues for predators and their prey.

BBC: NEWS | Science/Nature | The deafening sound of the seas