speed instability 中文意思是什麼

speed instability 解釋
速度不安定性
  • speed : n 1 快，迅速。2 速率，速度。3 （汽車的）變速器，排擋。4 （膠片，照相紙）感光速度。5 〈古語〉興隆...
  • instability : n. 動搖性，不穩定性；不堅決，反復無常，三心二意。 the instability of human affairs 人事滄桑。
  1. When the axial speed varies harmonically about a constant mean one, the method of multiple scales is applied to the axially moving beam to determine the instability boundary due to parametric resonance

    當軸向運動速度在其常平均值附近作簡諧波動時，應用多尺度法給出軸向變速運動梁參數共振時的不穩定條件。
  2. There were wind shear and maximum wind speed occurred above or below the height of potential instability area and one of them happened before potential instability

    位勢不穩定區所在高度的上方和下方會有風向切變和風速極大值中心，並且風切變或急流中心會早於位勢不穩定的出現。
  3. The shearing layer is carried by the jet and the eddy is formed because of the instability and selective amplification of shearing layer which will propagate to the downstream. as the eddy impacts the impinging wall, a wave of pressure disturbance with certain frequency is induced. this wave then propagates to the upstream with high speed, and results in the overlap and amplification of the waves when the frequencies of them are close with each other

    當前噴嘴流束中的不穩定擾動波在穿過腔內的剪切層時，剪切層對其有選擇放大作用，形成渦環結構，剪切流動中渦環與碰撞壁撞擊，在碰撞區域產生壓力擾動波並向上游反射，在上游剪切層分離處誘發新的擾動的產生，當新擾動與原擾動匹配時，射流上游就被不斷地受到周期性激勵，腔內就產生流體自激振蕩並在後噴嘴出口形成脈沖射流。
  4. Concerning the problem of the frequency instability, slight but not negligible, in electric power system, this paper discusses the resultant error in measurement in detail and develops an error - correction interpolated algorithm in frequency domain. taking advantage of the high calculating speed of pc, the measurement error in frequency, amplitude, and phase are well eliminated

    本文針對電網頻率輕微但不可忽視的不穩定造成的測量誤差問題進行了詳細的討論，形成了一套在頻域實現誤差校正的方法?插值演算法，並利用pc機高速的數據處理能力軟體校正了各次諧波的頻率、幅值及相位。
  5. First super - low specific - speed centrifugal pump has a long and narrow flow passage for its high head and low capacity, and the power absorbed by disc friction is too high, so the efficiency is very low ; secondly the diffusion of flow passage is so high, that the reserved flow often emerges at the inlet and outlet of impeller. therefore the h ~ q characteristic curve is often hump - shaped, and at the low - capacity operating condition the instability often occurs ; thirdly the centrifugal pump at high - capacity operating condition is easy to overload because the n ~ q curve appears a rising trend

    首先由於它的揚程較高、流量較小，所以它的流道狹長，圓盤摩擦損失較大，效率相對較低；其次由於它的流道擴散較嚴重，易在葉片進口產生迴流和在出口產生脫流，揚程流量特性曲線易出現駝峰，在小流量工況下易產生不穩定現象；第三，由於其功率流量曲線呈現上升趨勢，在大流量區運行時電機易過載。
  6. The titanium alloy valve is more superior than ordinary steel valve in lighter, smaller thermal expansion coefficient, lower in thermal expansion, fatigue durable, good elasticity, and reduces oil consumption so as to prevent instability while revolving at high speed and obtain perfect performance

    鈦合金汽門彈簧比一般鋼閥材質更輕巧、熱膨脹系數小、熱量傳導擴散更低、耐疲勞、彈性佳、減少油耗，以阻止在高速運轉下的不穩定以獲致最完美的性能表現。
  7. The judgement formula for high and low speed landslide and a new theory of stiffness - effect instability are presented for the instability of planar - sliding slope by the catastrophe theory. it is pointed out that the limit equilibrium stability analysis method of rigidity body has a lot of defects. the relationship between the action of outside environment and the response of slope system is complicatedly nonlinear according to the nonlinear dynamics model of slope evolution built

    針對斜坡平面滑動失穩問題，運用突變理論方法，給出了快速滑坡和慢速滑坡發生的判據，驗證了剛體極限平衡穩定性評價方法有較大缺陷；根據斜坡演化非線性動力學模型，發現斜坡演化過程會出現混沌現象，其通向混沌之路是通過倍周期分叉實現的。
  8. In this study, the effect of rotating elliptical inner cylinder on the instability of flow field, the relationship between azimuthal wave speed and the angular speed of inner cylinder, and the so - called ' hysteresis ' will also be investigated experimentally

    本文主要目的除了藉由實驗比較橢圓與圓形截面內柱兩種系統加速過程中不穩定發生時機、流場流況的差異外；對于所謂的遲滯現象于兩系統中的發生過程亦將探討，此外內柱幾何形狀所造成高階不穩定於圓周方向的波形相速度變化，也是本文的探討重點。
  9. For a large - scale high - speed rotor - bearing system, the oil - film force of sliding - bearing may cause oil - film instability of the system, which has great impact on accident prevention and safety operation

    對于大型?轉子軸承系統，滑動軸承的油膜力引起的轉子運動系統油模失穩現象是突出問題，直接關繫到機組的災變防治和安全可靠運行。
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