李振起 的英文怎麼說
中文拼音 [lǐzhènqǐ]
李振起
英文
zhenqi li-
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。By combining the parameter smooth projection algorithm and the integral - type lyapunov design technology with the sliding mode design technology with boundary layer, the performances for the system to avoid the parameter drift phenomena, the chattering phenomena, and the controller singularity problem were improved
通過將參數光滑投影演算法，帶飽和層的滑模面設計技術以及積分型李雅普諾夫設計技術集成起來，使得演算法提高了系統在抑制參數漂移、抖振現象、控制器奇異等方面的能力。The event was kick - started by dr the honourable sarah liao, jp, secretary for the environment, transport and works, mr keith kwok, jp, permanent secretary for the environment, transport and works environment, mr joseph lee, bbs, jp, chairman of the ecc, mr anthony lam, jp, director of fire services and professor lam kin che, jp, chairman of the advisory council on the environment, together with representatives from the environmental protection bureaux of guangzhou, shenzhen, zhuhai, zhongshan and environment council of macao, symbolizing a joint effort of the mainland, hong kong and macao in promoting environmental protection
環境運輸及工務局局長廖秀冬博士， jp環境運輸及工務局常任秘書長環境郭家強先生， jp環保會主席李宗德先生， bbs ， jp消防處處長林振敏先生， jp及環境諮詢委員會主席林健枝教授， jp ，以及廣州深圳珠海中山環境保護局及澳門環境委員會代表為活動擔任主禮嘉賓，象徵內地本港及澳門聯合一起推動環保工作。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