Sized eight (854), frequency of Scholars, notes Collator, Ren Nanling County main book, has been promoted to martial magistrate.
大中八年（854），频中进士，调校书郎，任南陵县主簿，又升任武功县令。
The relatively complete theory of frequency method and root locus method for the design of automatic control system was set up through the efforts of numerous scholars after world war II.
二次大战以后，经过众多学者的努力，形成了较为完整的自动控制系统设计的频率法理论和根轨迹法理论。
The topic of Energy saving on motor system has always being researched by scholars, and the variable frequency variable speed technology has been paid the focus attention among the researches.
电机节能问题一直是广大学者研究的热点，在电机节能技术中最受瞩目的是变频调速技术。
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