脈動方程 的英文怎麼說

中文拼音 [màidòngfāngchéng]
脈動方程 英文
pulsation equation
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 程 : 名詞1 （規章; 法式） rule; regulation 2 （進度; 程序） order; procedure 3 （路途; 一段路） journe...
  • 脈動 : [物理學] [天文學] pulsation; pulsing; pulse; ripple; impulsive motion; pulsating; panting; loping...
  1. Based on a duralumin flexible beam with piezoelectric films attached, distributed parameter modal described by partial difference equations is builded, and then turned into a set of two order systems with the method of modal analyse. state feedback control and independent modal control is investigated. and simulation of the closed - loop system with thest two methods is performed in matlab

    並用模態分析的方法，將系統的偏微分方程模型轉化成了模態模型；研究了狀態反饋和獨立模態方法；進一步完善了軟體界面以及軟體功能；在實際系統中，應用狀態反饋演算法，有效抑制了懸臂梁在受到外界瞬時脈沖擾動和激振引起的一階、二階模態振動。
  2. Forced oscillation for a class of nonlinear impulsive delay parabolic equations

    一類非線性脈沖時滯拋物型方程的強迫振動性
  3. Linearized oscillation of nonlinear delay differential equations with impulses

    非線性脈沖時滯微分方程的線性化振動
  4. Oscillations of higher order linear odes with impulses

    高階線性脈沖微分方程解的振動性
  5. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。
  6. Global classical solutions to one dimensional flow basic equations in artery blood ressel

    動脈一維管流基本方程組整體經典解
  7. In this paper, we study the oscillation of the higher order differential equa tion with impulses

    本文主要討論了高階脈沖微分方程解的振動性，得到了高階脈沖微分方程解振動的充分條件。
  8. Abstract : there are offered many ways how to improve work of a spark plug. but one of the m ost important problems has not been solved yet. this is a thermal mode operation of a spark plug. the ideal spark plug should be instantly heated at the moment of occurrence of a spark and instantly cooled down in expectation of the foll owing electrical pulse. thus it balances between preservation of heat for self ? c leaning from scale and its removal in avoidance self ? ignition. in this article a uthor managed for this time to offer a spark plug with capability “ self ? regula tion ” of heat flux removed from a zone of ignition. essence of the offer is a t ip ， which is transparent for heat flux. it is produced from single crystal of sap phire

    文摘:在如何提高火花塞的工作質量方面有多種方法，但是其中最重要的一個問題還沒有得到解決，那就是火花塞工作的熱學模型問題.理想的火花塞應該能在點火的瞬間被立刻加熱，並且在接下來的電脈沖過程中迅速冷卻，由此在熱量的存儲與散發之間取得平衡，以避免自點火.本文力圖展示一種具有自動調節源於點火區域熱流能力的火花塞，其技術的關鍵是頂部絕緣體材料，它是由藍寶石單晶製作，而非傳統的氧化鋁陶瓷
  9. Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately

    在理論分析方面，建立合理的有限元模型，利用剛性模型風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程，在頻域內和時域內進行了大跨網架屋蓋結構的風振響應分析。
  10. The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance

    通過對電機的kron變換和對稱分量變換，建立了系統較精確的數學模型，編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究，實驗和模擬結果進行比較，說明實驗和理論較為一致，並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究，由於減少了低次諧波，改善了系統性能。
  11. 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。
  12. With development of industry, there are a lot of new kinds of physcial models, of these there is one that can not be described only by impulsive differential system. in this case, we should switch to a new set of differential equations taking into consideration momentary perturbations of impulsive nature. a general description of such systems was called impulsive systems with variable structure

    隨著工業的發展，出現了許多新的物理模型，其中有一類僅用脈沖微分系統無法恰當地描述，這時，就需要考慮具有瞬時脈沖攝動性質的一族新的脈沖微分方程，對這樣的系統我們一般稱為具有可變結構的脈沖微分系統。
  13. Motion equations for the composite laminated plates induced by oscillatng flow were derived

    摘要導出在脈動流順流向作用力下的復合材料層合板的運動方程。
  14. The mathematical model of diesel - generator set in the mechano - electronic transient process is proposed in this paper, the pulsation and delay of diesel torque are analyzed, the relation between diesel torque and diesel rotational speed together with injection pump rack bar displacement is described exactly. the motion law of diesel - generator set is revealed all - sidedly and nonlinear problem of diesel - generator set is settled by piecewise linearzation method

    本文提出了柴油發電機組機電暫態過程的數學模型，分析了柴油機轉矩的脈動和滯后，準確地描述了柴油機輸出軸扭矩與柴油機轉速和噴油泵齒桿位移之間的關系，全面揭示了柴油發電機組的運動規律，利用分段線性化的方法解決了柴油發電機組的非線性問題。
  15. This paper gives a review on the five analysis approaches of fluctuation pressure on the hydraulic structures and hydromachines : the method of probability and random process, the method of time - space correlation, the method of fitting data, the method of distribution hypotheses on the data of test survey stations, and the hydromechanics method

    摘要綜述了水工建築物及水利機械上脈動壓力的五種分析方法：概率和隨機過程法；時空相關法；數據擬合法；根據實驗測點數據分佈假設法；流體力學方法。
  16. This paper describes the vibration equation of this structure, and derives the horizontal vibration displacement and acceleration response spectrum and the mean square response on the base of the complex modal analytical theory

    建立該結構體系在脈動風作用下的振動方程，基於隨機振動的復模態理論，推導位移和加速度響應譜及均方響應的表達式。
  17. Abstract : in this paper, we study the random equation to elastic caminal rectangle plate under single concentrated random load by random vibration theory, and discuss the dynamic response to it by separating the variable, and study the frequency response function and unit pluse response function to the load and response

    文摘:運用隨機振動理論，推導了彈性矩形薄板在單個隨機集中載荷下的振動方程，並用分離變量法討論了其動力響應，研究了對應于激勵與響應的頻率響應函數和單位脈沖響應函數。
  18. The motion equation of a high - rising structure subjected to fluctuating wind load is developed, with the consideration of soil - pile - structure interaction

    摘要本文推導了考慮樁土結構動力相互作用時高層建築在脈動風荷載作用下的運動方程。
  19. In this paper, according to the fluid dynamic theory, mathematical model of the pressure transients accompanying the growing and collapsing of gas bubbles and cavitation in low pressure hydraulic pipelines is given, based on the continuity equation and motion equation. the mathematical models of friction item, the growing and collapsing of gas bubbles and cavitation are also introduced

    本文通過流體力學分析方法，在連續性方程和運動方程基礎上，建立了低壓液壓管路中伴隨氣泡和氣穴產生的瞬態壓力脈動數學模型，給出了動態摩擦力數學模型及氣泡和氣穴產生及破滅數學模型。
  20. The finite difference method and matlab / simulink are used to simulate the pressure transients accompanying the growing and collapsing of gas bubbles and cavitation in low pressure hydraulic pipelines. a method using selector block in matlab simulink to solve the equations in spatial dimension is developed. the pressure transients under different conditions such as different initial flow rate, different viscosity and different initial gas bubble volume are simulated

    採用有限差分及matlab / simulink模擬方法，提出了採用simulink中selector模塊求解空間域上積分的方法，對低壓液壓管路有氣泡和氣穴產生的瞬態壓力脈動過程進行了時間域和空間域上的求解，對不同起始流量、不同液壓油粘度和不同初始氣泡量等條件下的瞬態壓力脈動過程進行了模擬研究。
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