擺動波 的英文怎麼說
中文拼音 [bǎidòngbō]
擺動波
英文
trochoidal wave-
In this paper, the rotating machinery at high speed is studied. there are discussed about numerical calculating methods for non - linear dynamical system, the rotor system radial impact and rubbing dynamics behavior analysis having the nonlinear rigidity on the unsteady and non - linear oil film, the rotor system dynamics behavior analysis with bending - torsional - pendular coupling vibrations, application of wavelet, fractal and network in fault diagnosis. the main works in this paper are as follows : ( 1 )
本文以高速旋轉機械為主要研究對象，系統、深入地研究了非線性動力學系統的數值計算方法、具有非線性剛度的轉子系統在非穩態非線性油膜力作用下的徑向碰摩動力學行為、轉子彎扭擺耦合振動的動力學分析、小波和分形理論及人工神經網路在故障診斷中的應用問題。Through the experiment, the following results were given out, whether the system was rolling or not, there were always density oscillation gradients when the two - phase flow instabilities occurred, and the stability of the system was always strengthened with the increasing of the inlet mass flow or the increasing of the inlet subcooling of the test tube
實驗結果表明，無論是搖擺還是不搖擺，系統發生的不穩定類型中都有密度波型脈動成分，系統的穩定性總是隨流量的增加而增強，隨入口過冷度的增加而增強。What ' s more, we put forward some experienced formulas on the basis of the cortical analysis. the result of the research show that by installing diffluent piers with low ridge, we can eliminate the root of oscillatiny water jump, perfect the energy dissipation effect of water jump, also, we can improve the flow condition of down - stream. the fact that the main flow of down - stream is in the middle, not only effectively lower the speed of the bottom flow in the ridge rear, alleviate the erosion to the river bed, but also avoid the heavy wave resulted from the main flow in the surface, thus improve the surface wave of down - stream obviously. we can work out the body style parameters of diffluent piers with low ridge according to the project flow condition and experience formulas, and then reckon the down - stream surface wave condition for the protected building of the down - stream bank
研究結果表明：設置低坎分流墩后，消除了擺動水躍水舌擺動的根源，提高了水躍的消能效果，改善了下游水流流態。下游水體的主流在中部，既有效的降低了坎后水流底流速，減輕水流對河床的沖刷，又避免了主流位於表面導致波浪過大的結果，下游的水面波浪明顯得到削減。依據經驗公式，可根據工程水流條件設計出低坎分流墩的體型參數，進而估算出下游沿程的水面波浪，為下游岸邊的砌護提供依據。Since these theoretical analyses are based on inviscid potential flow theory, theoretical calculation and computational simulation may complement each other. the hydrodynamics and undulating propulsion of specimens were studied using three dimensional computational fluid dynamics ( cfd ) modeling. the cfd analysis using kinematic model of undulatory dorsal / median fin draws a series of conclusions, which include that the body drag increases significantly with the lateral body oscillation ; the body drag is minimum while the start point of
計算結果表明游動過程中的形體阻力隨側向周期性擺動而增大;當背鰭前端位於身體側向最寬處時，形體阻力具有局部最小值，結論與實驗觀測結果相吻合;在實驗觀測的典型運動參數下，波動面的運動方程中的非對稱因素的出現使推進力增大約1 . 10倍。An automated de - noising algorithm based on the energy of wavelet packet not donoho ' s threshold algorithm is established. a gear feature vibration signal extraction method using the wavelet packet energy is proposed, which can separate gear meshing vibration, noise vibration and gear fault vibration signal from the original gearbox case vibration signal. basis pursuit ( bp ) algorithm is introduced into the filed of mechanical signal de - noising and feature extraction for the first time
第三章擺脫了donoho的閾值消噪思想，從能量的角度建立了基於小波包的自動消噪演算法；提出基於小波包能量分佈的齒輪故障特徵信號提取方法，可以將齒輪嚙合振動信號、干擾振動信號以及故障沖擊振動信號從原始齒輪振動信號中分離出來；首次將基追蹤消噪演算法引入到機械故障信號的消噪與特徵提取上，通過對齒輪故障信號的消噪，表明了它的有效性，並對影響該方法實際應用效果的因素進行了全面的分析，同時也指出了該方法存在的局限性。The construct of the parts of swing movable teeth reducer is studied, renovating design of eccentric gear, moveable teeth and internal gear is given
探討了擺動活齒減速器中各零部件的結構，從提高傳動效率出發，對擺動活齒減速器的偏心輪激波器、活齒、中心輪內齒圈的結構進行了改進設計。The method using wavelet packet analysis is proposed to extract fault information from vibration signal obtained from testing jig of tilting train. the vector comprised of the energy of signal in all spectrum bands is input to a feed forward neural network
利用小波包分析，將擺式車體試驗臺上採集到的振動加速度信號分解在相互獨立的頻帶之p內，各頻帶內的能量值形成一個向量，將其作為神經網路的輸入特徵向量， 。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。Finally, the values of kinematic parameters in typical swimming are estimated for theoretical calculation and computational simulation. based on the kinematic formulation, this paper applies large - amplitude elongated body theory to propulsive performance of undulatory dorsal / median fins and establishes a set of equations for estimation of the propulsive force and the propeller efficiency. the calculations based on experimental data coincide with blake ’ s result in 1980
從波動運動的參數方程出發，本文基於大擺幅伸長體理論對背鰭/背臀鰭波動模式的推進性能進行了分析，推導推進力和推進效率的計算公式，利用實驗觀測典型運動參數對仿生對象的推進力和推進效率進行了理論估算，結果與blake的計算結果相吻合，從而驗證了所建運動學模型的有效性。So she sat on, with closed eyes, and half believed herself in wonderland, though she knew she had but to open them again, and all would change to dull reality - the grass would be only rustling in the wind, and the pool rippling to the waving of the reeds - the rattling teacups would change to tinkling sheep - bells, and the queen s shrill cries to the voice of the shepherd boy - and the sneeze of the baby, the shriek of the gryphon, and all thy other queer noises, would change she knew to the confused clamour of the busy farm - yard - while the lowing of the cattle in the distance would take the place of the mock turtle s heavy sobs
盡管她知道只是重溫一個舊夢，而一切都仍會返回現實：蒿草只是迎風作響，池水的波紋擺動了蘆葦。茶杯的碰擊聲實際是羊頸上的鈴鐺聲，王后的尖叫起源於牧童的吃喝。豬孩子的噴嚏聲，鷹頭獅的尖叫聲和各種奇聲怪音，原來只是農村中繁忙季節的各種喧鬧聲。The method combining digital filter and ship - dynamic compensation is used to realize the precise motion - target tracking on the condition of ship - motion which causes the target relative motion and the results coming from real system test prove the effectiveness
針對甲板運動所造成的目標的相對運動和牽連運動，採用數字濾波與動態補償相結合的方案，實現了艦船搖擺情況下跟蹤雷達對運動目標的精確跟蹤，並經實踐驗證后裝備于某型跟蹤雷達。Nutritionist cynthia lair, a lecturer at bastyr university in the state of washington, believes this trend makes sense in terms of health, stating, a good feast should have high - quality ingredients. and from the animal rights perspective, seth tibbott, founder of turtle island foods, maker of tofurky a turkey replacement made of tofu, wheat gluten, vegetable seasonings and spices says, its a mystery to us why anyone would put a dead bird on the table. for thanksgiving 1995, turtle island sold only a few dozen tofurky feasts tofurky and trimmings, including gravy with tofu giblets artificial turkey innards which feed four people and cost 20 apiece
島食品公司turtle island foods的創辦人賽斯蒂波特研發了豆腐火雞用豆腐麵筋植物性調味料和香料製成的火雞替代品，他更從保護動物權益的角度指出：我們一直感到困惑不解，為什麼大家會把一隻死雞擺在餐桌上呢？ 1995年的感恩節，島公司只賣出幾十份豆腐火雞大餐-每份大餐包括一隻豆腐火雞豆制內臟和鹵汁，可供四人享用，售價20美元但2004年的感恩節，島公司則預估將售出16萬份。By applying dwt and mallat in wavelet analysis, the oscillation signal of active power on transmission line is decomposed and reconstructed ; the strategy of upfc ' s secondary control based on wavelet is proposed by using the reconstructed active power as input signal. simulation results verify the efficiency of damping subsequent swing quickly under serious power oscillation circumstance that is hard to damp by ordinary upfc controller. the system dynamic stability is apparently enhanced
針對系統功率波動頻率較高情況下upfc對系統后續擺穩定的控製作用難以得到充分發揮的情況，採用小波分析的mallat塔式演算法對系統功率波動信號進行分解，並基於mallat塔式重構演算法的思想濾除了信號的冗餘擾動成份，尋找到一個高壓縮比、低相對誤差的重構功率信號，從而使其能夠符合upfc實際控制需要。Test rolling table is an analogue equipment, which simulates the motions of a ship disturbed by the wave force, and it serves as the bench simulated ship motions for performance test of the anti - rolling tank
試驗搖擺臺是用於模擬船舶在波浪作用下的運動的一種模擬裝置，為減搖水艙性能試驗提供船舶運動模擬平臺。When the velocity is changed, in order to change the amount of seeding transplant, single - chip microcomputer adjusts the frequency of electromagnet
當行走速度發生改變時，單片機改變方波的頻率，經驅動電路改變電磁鐵的吸合頻率（激振頻率） ，以達到調節擺秧量的目的。When analyzing the conditions of monetary cooperation, the dissertation compares east asia with ecu region and south america on financial and exchange rate policies first, and then discusses 6 basic cooperating conditions completely. these conditions are : ( 1 ) the industry and trade related rate and economic open rate among east asia countries ; ( 2 ) diversity degree of products in the region ; when countries in the region can meet the condition of " diversity of low degree products ", operating monetary cooperation may have significant in reality ; ( 3 ) consistence of member states " economy period and symmetry of financial relation among member states ; ( 4 ) inflation rate ' s similarity among member states ; ( 5 ) coordination on policy among member states ; ( 6 ) support of a hard currency in the region. without a hard currency ' s support, monetary cooperation will be destroyed easily by outer speculating capital because of limitation of economy and store capital in the region
在對東亞貨幣合作可行性條件進行分析時，本文首先對東亞和其它貨幣合作區域的金融及匯率制度進行分析，以確定東亞地區在貨幣合作階段上所處的位置；然後對實施東亞貨幣合作的六大基礎條件進行了詳細的論述和分析，分別是門）區域內成員間的產業與貿易關聯度，其值越高，貨幣合作的收益越大：區域內各成員的經濟開放度，外貿依存度較高則合作收益明顯： （ 2 ）區域內產品的多樣化程度，當區域內成員符合「低程度產品多樣化」的條件時，實行貨幣一體化以抵禦外部沖擊才具有現實意義； （ ）區域內各成員之間經濟周期波動的一致性，區域內成員的金融關系及受外界沖擊的對稱性； （ 4 ）區域內各成員間通貨膨脹率的相似性； （ 5 ）區域內各成員在政治上的協調性； （ 6 ）區域內強勢貨幣的支持，缺乏強勢貨幣的支持而建立起來的貨幣同盟會因整體經濟實力和儲備資產的限制而難以擺脫外部投機資本的沖擊。The response of the vibration system is solved. the torsional and flexural vibrations of swing movable teeth transmission system is analyzed and the elasticity of driving shaft, the elasticity of output shaft bearings and the elasticity of movable teeth are taken into consideration. the dynamic analyzing model of swing movable teeth transmission system is established
對擺動活齒傳動系統的彎曲振動、扭轉振動及其耦合效應進行了分析，並綜合考慮了系統的輸入軸的彈性、輸出軸軸承的彈性以及活齒與激波器、內齒圈的嚙合彈性等的影響，建立了擺動活齒傳動系統彎、扭耦合振動的動力學分析模型。The function and principle of all components of tilting control system such as detection subsystem, control subsystem and tilting actuation subsystem were illustrated in the paper. the design of the communication interface card between pc / 104 and the control network - lonworks was set forth in the paper. the design of interface program, data collection program, digital filter program and the interface program of network were described in detail in the paper
本文具體闡述了傾擺控制系統的各組成部分：檢測子系統、控制子系統、以及傾擺作動子系統的功能及原理；描述了主控計算機（ pc 104 ）和控制網路（ lonworks ）之間的通信介面卡的設計；對傾擺控制系統的界面設計、數據採集程序、數字濾波程序和網路介面軟體設計進行了詳盡的分析；對傾擺控制系統的控制策略進行了模擬並對傾擺控制系統進行了靜態調試。The main work and results are as followings. according to gear engagement principle, the math model of swing movable teeth drive is established. the engagement curve, engagement equation, relative speed between eccentric gear and movable teeth, and between movable teeth and internal gear are presented, and the gear equation of internal gear is presented
取得了以下研究成果：根據齒輪嚙合原理，建立了基於齒輪嚙合原理的擺動活齒傳動的數學模型，推導了偏心輪激波器與活齒、活齒與中心輪內齒圈的接觸線方程、嚙合方程、相對速度和中心輪內齒圈的齒形方程。To assess risk level, check these three factors : the fund ' s biggest quarterly loss, which will help you brace for the worst ; its beta, which measures a fund ' s volatility against the s & p 500 ; and the standard deviation, which shows how much a fund bounces around its average returns
關于如何判斷風險水平，請參照以下三個要素:基金每季度的最大損失，這能幫助你做好最壞的打算;貝塔系數，它能反映基金相對標準普爾指數的波動程度;標準差，這能夠顯示一個基金圍繞其平均收益上下搖擺的幅度。分享友人