[力] 瞬時速度
The dynamic vibration of hydraulic system is characteristic of instantaneous velocity, pressure and its oscillation.
液壓系統動力學振動程度可用瞬時速度、壓力和壓力脈動描述其特性。
On the basis of Newton's second Law, a motion differential equation has been put forward, by which a formula to calculating instantaneous velocity has been obtained.
依據牛頓第二定律列出運動微分方程式，解方程式并求得計算瞬時速度的公式。
When the leading bubble was steady, the relationship between instantaneous velocity, shape, acceleration of the trailing bubble and viscosity, bubbles distance, bubble length was obtained.
在領先氣泡達到充分發展後，得出了尾隨氣泡的瞬時速度、形狀和加速度與液體黏度、氣泡間隔距離和氣泡長度的關系。
It can provide instantaneous velocity of whole flow field and has high resolving power and high precision.
它能夠提供瞬時整個流場的定量信息，而且具有很高的空間分辨率和很好的精度。
In addition, the instantaneous velocity is calculated, and its influencing factors are analyzed.
另外，還分析了排氣孔口瞬時速度的影響因素，對瞬時速度進行了計算。
So that's the definition of v, instantaneous velocity.
這些就是v的定義，也就是瞬時速度。
We've now observed the instantaneous velocity of a Brownian particle, says Raizen.
Raizen說：”我們現在已經觀察了布朗粒子的瞬時速度。
The characteristics of the acceleration of the instantaneous velocity center(IVC) were presented, and the trajectory equation for pure rolling of rigid body (PRORB) was developed.
分析了瞬心的加速度特性，建立了剛體平面純滾動的軌迹方程。
And now you will understand how we define the instantaneous velocity at time t which is different from an average velocity between two time intervals.
現在明白了嗎，t時刻,的瞬時速度是怎樣定義的,與兩時刻間的平均速度相比,瞬時速度并不一樣。
In contrast with averaged velocity field, more than one large-scale vortexes appear in instantaneous velocity field.
與平均流場所顯示的氣流結構不同，瞬時流場表現出*********的多渦結構。
After optimization, the cutting angle and The difference between the instantaneous velocity and the average velocity in the cutting area of the shear are decreased.
優化後，在剪切區，剪刃剪切傾角和連杆水平速度均勻性兩項指标均有所提高。
According to the flow structures identified from instantaneous velocity fields, the vortex street is created at the airfoil tail region.
在測量範圍内，翼型的尾緣處是近尾迹渦街的形成區；
This paper introduce technical of virtual instrumentation based on PXI bus and laser Doppler velocity for the instantaneous velocity measuring of automatic mechanisms.
本文将基于PXI總線的虛拟儀器技術和激光多普勒測速儀引入到自動機原動件的瞬時速度測量系統當中。
Formulations of the lift and the thrust are derived based on the three-dimensional unsteady vortex lattice method, and the effect on instantaneous shape velocity is analyzed.
推導了新的基于空間非定常渦格法的撲翼飛行器升力和推力的計算公式，然後分析了瞬時形狀速度對它們的影響。
This paper proposes a technique for on line detection of cylinder-to-cylinder nonuniformity and incipient misfire by instantaneous angular velocity signals in automotive engines.
提出一種利用瞬時轉速信號線上監測汽車發動機各缸工作不均勻性和失火故障的方法。
Particle-image Velocimetry (PIV) system was used to measure the instantaneous streamwise velocity and longitudinal velocity in turbulent boundary layer on a flat plate.
應用粒子圖像測速（PIV）系統對平闆湍流邊界層内流向和法向的瞬時速度進行了測量。
The influence of cleaning pressure on the instantaneous axial velocity is analyzed. It is shown that the gas flows in the filtering candle can be divided into inward and outward sections.
結果表明，濾管内氣體流動可分為進氣過程和排氣過程，穿過濾管壁的平均徑向反吹速度和回流速度沿濾管軸向分布不均勻是導緻濾管外表面清灰不均勻的重要原因。
In view of the original voltage pulse signals of transducer sensor being modulated, this thesis adopts the 0 level as the standard level to calculate the instantaneous rotational velocity signals.
針對支架振動引起的原始電壓脈沖信號被調幅的影響，可以采用0電平為基準電平進行瞬時轉速信號的計算；
An example of another type of anemometer in which the airstream displaces an indicator giving an instantaneous reading of velocity or flowrate is the rotameter .
另一類流速計的典型代表是轉子流速計。這種儀器的工作原理是氣流使一指針偏轉，指示出瞬時速度值。
In accodance with kinetic energy theorem, this paper presents an angular mo- mentum theorem of velocity instantaneous centre axis. This theorem is a ****** and convenient scalar equation.
從動能定理出發，推導出一個對速度瞬心軸的角動量定理，它是一個簡便的标量方程。
This paper introduced a way for finding the acceleration of slider in the crank- slider mechanism by the use of velocity instantaneous method, and gave out the demonstration.
本文介紹了用速度瞬心法求解曲柄滑塊機構滑塊加速度的方法，并給予論證。
Based on the model test, the instantaneous concentration and velocity images in different temperatures and scales are put forwarded. And the range, shape and trend of diffusion are acquired.
本文結合模型試驗，得出了不同溫升及變率下表面橫向浮射流的瞬時濃度場和流速場，進而分析得出隨着溫度及變率的變化濃度場的擴散範圍、形态特點和趨勢。
The instantaneous angle-velocity was found by using this method and the experiment was proved.
通過試驗應用，該方法可以準确得到瞬時角速度。
The results showed that instantaneous bat swing velocity statistically increased for group 1 (7.1%), group 2 (7.8%), and group 3 (6.6%) after 8 weeks of training.
結果顯示，在經過8周的訓練後，瞬時揮棒的速度從統計數字的增長上看第1組有7.1%，第2組有7.8%，第3組有6.6%。
Moreover, the use of additional resistance worn on the forearm while swinging a baseball bat did not contribute to further increases in instantaneous bat swing velocity and batted-ball velocity.
縱觀這些有助于提高擊球速度的因素，力量教練要用具備的科學研究信息去幫助棒球或壘球運動員增強其擊球速度制定抗阻訓練方案。
There from it is used to obtain the principles of the angular of momentum of the system of particles with respect to its cenier of mass and instantaneous center of velocity.
采用簡捷的方法推導質點系相對于任意動點的動量矩定理，并由此引出質點系相對于質心的動量矩定理和質點系相對于速度瞬心的動量矩定理。
Based on the theorem for the composition of velocities in theoretical mechanics, the author gives out the demonstration of the theorem of three instantaneous centers of velocity in general conditions.
本文運用理論力學中運動學的速度合成定理，給出了一般情況下平面機構運動三心定理的求證過程。
|instantaneous speed;[力]瞬時速度
瞬時速度（Instantaneous Velocity） 是物理學中描述物體運動狀态的核心概念，指物體在某一特定時刻或運動軌迹上某一精确位置的速度。它反映了物體在該瞬間運動的快慢和方向，是一個矢量（既有大小又有方向）。
瞬時速度（instantaneous velocity）是物理學中描述物體運動狀态的核心概念，具體含義如下：
1. 基本定義 指物體在某一具體時刻的精确速度值，反映該瞬間物體運動的快慢和方向。數學上定義為位移對時間的導數：$$v(t) = lim_{Delta t to 0} frac{Delta x}{Delta t} = frac{dx}{dt}$$
2. 與平均速度的區别 平均速度是時間段内的整體位移除以時間間隔（$bar{v} = frac{Delta x}{Delta t}$），而瞬時速度關注時間間隔趨近于零時的極限狀态。例如：汽車儀表盤顯示的實時速度即為瞬時速度的近似值。
3. 矢量特性 瞬時速度是矢量，包含：
4. 應用場景
5. 圖像表示 在位移-時間（x-t）圖中，某點切線的斜率即為該時刻的瞬時速度。例如抛物線軌迹頂點處的切線水平，說明該時刻瞬時速度為零。
理解瞬時速度需要掌握微積分中的導數概念，它是研究動力學（如牛頓運動定律）的基礎工具。若需更深入的學習，建議結合微積分教材與經典力學案例進行練習。
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