李振平 的英文怎麼說
中文拼音 [lǐzhènpíng]
李振平
英文
zhenping li-
The inner - plant economical operation of lijiaxia hydropower station is studied based on the disadvantageous operating mode area of the units determined by school of civil engineering of tianjin university and the actual operating experience of the lijiaxia hydropower station in the last a few years
摘要以天津大學建築工程學院確定的李家峽水電站機組的不利工況區為依據,以近幾年來該水電站的實際運行經驗為參考,在綜合考慮機組初始運行狀態、機組振動特性、機組出力、下泄流量、水庫蓄水量和電網負荷平衡等因素的基礎上對李家峽水電站的廠內經濟運行進行了研究。In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基於李家峽水電站雙排機組振動的現場試驗研究,並且針對傳統頻譜分析方法傅立葉變換( fft )對于非平穩信號已力不從心這一缺陷,利用小波分析方法在時域和頻域上同時具有良好的局部化性質,通過對開停機這一典型非平穩過程信號進行小波及小波包分析,將其分解到不同頻帶內,獲取微弱信息和提取優勢頻率,並對其作振源分析,得出開停機初始時刻因水流不穩均出現強烈的振動現象,且低頻段信號能量最大,開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。Yansong li, nanjing zhou, baoxu zhao, zhenjiang zhao, ping hao, ming yuan
李巖松周南京趙寶煦趙振江郝平袁明Li ) at about 2 pm yesterday, the mayor of dongguan changan vibration on road near shatou integrated market with a vicious homicide in the streets after the accident, a man was killed
本報訊(記者李平)昨日下午2時許,在東莞市長安鎮振安路沙頭綜合市場附近發生一起惡性凶殺案,一男子車禍后當街被人打死。For the luggage conveyer system runs smoothly and steadily, we synthetically analyzed the characteristic of the belt machine ' s running, starting and applying the brake. we decide to use the current transducer 6se92 of siemens with high function u if control. this transducer ' s functions of adding or decreasing speed with s form and torque promoting can magnificently solve the belt machine ' s vibration in the time of starting and brake and make the belt machine smoothly working with vary goods
為了實現行李輸送系統平滑穩定的運行,我們綜合分析了皮帶機運行特性,及起、制動時的特性,決定採用具有高功能型u f控制的通用變頻器6se92 (西門子) ,此變頻器的s形加減速功能和轉矩提升功能,能很好的解決皮帶機起制動時的振動及不同帶載量時的穩速運行。分享友人