center-of-mass system 中文意思是什麼
center-of-mass system
解釋
質心-
Those sensitive parameters making system have negative damping and occur self - excited shimmy are horizontal pulling lever rigidity, tire sideslip rigidity, steering gear rigidity and damping, kingpin equivalent damping, kingpin caster angle, tire drag. and wheel center distance, tire side rigidity, vehicle wheel unbalanced mass, tire vertical rigidity, and distance from kingpin center to the vertical central line plane of tire have great influence on shimmy, but they do n ' t make the system have negative damping. and horizontal pulling lever damping, suspension damping and rigidity have very small influence on shimmy
橫拉桿剛度、輪胎的側偏剛度、轉向機剛度、轉向機阻尼、繞主銷當量阻尼、主銷后傾角、輪胎拖距是影響擺振的敏感性參數，適當調節某一參數可引起系統的負阻尼，使系統產生自激擺振；輪距、輪胎側向剛度、車輪上的不平衡質量、輪胎垂向剛度及主銷延長線與地面交點至車輪平面的距離對擺振的影響也較大，但不會使系統出現負阻尼；而橫拉桿阻尼、懸架阻尼與懸架剛度對擺振的影響很小。 -
The implementation uses two - dimension images as input. the arrangement of light spots on the lunar rover and the imaging geometry of the camera are used to compute the three - dimension coordinates of the light spots in camera coordinate system, and after transformation, the world coordinate of the light points. we can then easily get the coordinate value of center of mass of the rover after averaging the world coordinate value of light points
本文構造了一種光點配置單目ccd演算法，它以計算機視覺系統採集的二維圖像信息作為輸入，直接利用光點的幾何配置條件和攝像機成像幾何關系，求解出光點在ccd攝像機坐標系下的三維坐標，並經過坐標變換，轉化為在世界坐標系下的坐標，然後取其平均值，從而得出月球車的中心位置。 -
The influence of the eccentricity mass moment, position of mass center and the bearing stiffness to the vibration characteristics of the rotor system is discussed in detail ; 3. to verify the exactness of fem and learn the principle of vibration of dredge pump further, the orbit of the rotor shaft of the pump in the dredger is measured, the measurement results show : the repeat of the orbit of the rotor shaft is very bad when dredge pump is in the dredging mud condition
模態分析確定了泥泵的振動特性（固有頻率和振型） ；諧響應分析確定了泥泵轉子軸在偏心力的作用下軸截面處的最大響應位移；研究了轉子軸的質心位置、軸承剛度和質量偏心矩對轉子軸振動特性的影響； 3 、採用軸心軌跡法，實船測量了泥泵軸工作時振動響應值。 -
The basic parameters of pms of the powertrain mount system are measured by the experiments, simply introduce the certainty of mass center and mass inertia quadrature, and the experimental results are obtained finally
通過實驗對動力總成的基本參數進行了測試，分別對動力總成重心的確定和質量慣性矩的計算進行了簡要的介紹，最後給出了實驗結果。 -
Particle ratios embody the chemical equilibrium driven by inelastic interaction during rapid expansion when the temperature decreases in the colliding system, the measured hadron ratios provide the chemical composition of the fireball at the chemical freeze - out point and access the baryon transporter stopping ) for the initial conditions at early stage of the collisions. in this paper, we study the anti - proton to proton ratio from ig7au + 197 au collisions, analyzing p / p ratio as functions of rapidity, transverse momentum and centrality at ^ / saw = 200gev and the dependence on the center of mass energy of p / p ratio, compared with the experimental results. it shows that the p / p ratio has n ' t obvious dependence on rapidity for mid - rapidity, but shows a slight increase trend with pt increasing in the range of pt < 1gev / c for mini - bias or central collisions, and rqmd shows a more remarkable correlation between p / p ratio and centrality than experiments do at snn = 200gev
研究表明：對廠在中心快度區沒有明顯的快度依賴性，在越靠近邊緣快度區， p p呈下降趨勢；在對心碰撞或者最小無偏事件中， p p在低橫動量區域隨著橫動量的升高而增大； p隨著碰撞對心度的比實驗結果表現出稍強的隨對心度增大而減小的趨勢，尤其是有再散射ujrqmd模型；在中心快度區， p p隨著碰撞的質心能量的提高而快速的增大，與實驗結果一致；在低能，有末態粒子再散射的d較好的預言了的：但是在mc能量下，有末態粒子在散射的d所預言的p p值比實驗值要小。 -
Researcher bryanlaensler of he harvard - smithsonian center for astrophysics says if the explosion had occurred much closer to our solar system, qsay just 10 light years away, it would have severely damaged the atmosphere and possibly triggered a mass extinction of living things
哈佛史密森天文物理中心的研究員布萊恩?詹茲勒表示如果這次爆炸發生在離我們太陽系很近的距離，比如10光年遠的話，它就會嚴重破壞我們的大氣層，很有可能導致生命物種的大量滅亡。 -
Researcher bryan gaensler of the harvard - smithsonian center for astrophysics says if the explosion had occurred much closer to our solar system, say just 10 light years away, it would have severely damaged the atmosphere and possibly triggered a mass extinction of living things
哈佛史密森天文物理中心的研究員布萊恩?詹茲勒表示如果這次爆炸發生在離我們太陽系很近的距離，比如10光年遠的話，它就會嚴重破壞我們的大氣層，很有可能導致生命物種的大量滅亡。 -
Symmetry of physical measure in center of mass system
質心系中物理量的對稱性 -
It is constructed that radial impact and rubbing dynamics differential equations of the rotor system having the nonlinear rigidity on the unsteady and non - linear oil film. the bifurcation and chaos behavior of impact and rubbing fault rotor system caused by the parameters of nonlinear rigidity, rotor rotating speed, eccentric mass is analyzed, in the numerical value analysis method. the bifurcation diagrams, maximum lyapunov exponent diagrams, poincar maps, phase plane portraits, trajectories of journal center, time - history curve, amplitude spectra diagrams of the rotor motion are used
（ 2 ）建立了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微分方程，並應用含高階余項的非線性動力方程的線性化數值法研究了此類系統響應的復雜動力學行為，利用轉子響應的分岔圖、最大lyapunov指數曲線、 poincar截面映射、時域波形、相軌線、軸心軌跡、幅值譜等圖形分析了系統響應的周期運動、擬周期運動、倍周期分岔、混沌等運動形式的轉化與演變過程，重點研究了非線性剛度、轉子轉速、偏心質量等系統參數對碰摩故障轉子系統的分岔和混沌行為的影響。 -
The principal needs of realization on strategic inertial accelerometer are large measurement range ( higher than 70g ) and high stability. in this paper aimed at a most basic and typical " sandwich " structure with easy realization in techniques, the system of micromachined electrostatic servo - accelerometer is analyzed in detail on static and dynamic state, mainly including : the influence on the z - component of the center of mass, lateral accelerations disturbance and the applied bias voltage on the stability of the sensor
戰略慣導加速度計實用化的首要條件是大量程（ 70g以上）和高穩定性，本文針對一種最基本、最為典型和工藝上較易實現的「三明治」結構，從靜態和動態兩方面對電容式微機械靜電伺服加速度計系統進行了詳細分析。 -
A design on the testing system of mass center of engines, including its software and hardware are described in detail
摘要介紹了發動機質心測試系統的基本構成以及其軟硬體的設計實現。 -
The air bearing is the most important part of an attitude control system simulator for simulating a satellite moving in the weightless circumstance. performance of a satellite attitude simulation system based on air bearing is decided by the inertia matrix and gravity disturbance torque arising from a difference between mass center and rotation center, and air bearing can be used to simulate the algorithm of on - line mass - property parameters identification on the ground. so the problem of mass - property and gravity disturbance torque identification for satellite and air bearing is studied in this thesis
氣浮臺能夠模擬衛星在軌失重條件下的姿態運動，是衛星姿態控制系統物理模擬的核心部件，其轉動慣量和質心偏移引起的重力干擾力矩等決定了基於氣浮臺的衛星姿態物理模擬系統的性能，並且利用氣浮臺可以實現衛星質量特性在線辨識演算法的地面物理模擬驗證，因此本文對衛星和氣浮臺的質量特性及干擾力矩在線辨識問題進行深入研究。 -
At last, we propose a method to generate two mode su ( 1, 1 ) intelligent states for the center of mass and relative motional modes for two trapped ions. in our scheme, only three laser beams are employed, and their directions are all the same as the direction of the two trapped ions " alignment. under some initial conditions, our desired states are obtained as the steady - state solution to the master equation of the system
最後我們在此模型之上提出了一種新的運用離子對的質心振動模和相對振動模進行雙模su （ 1 ， 1 ）智能態的制備方案，它是系統在適當的初始條件下達到穩態時自動生成的態，它不必通過控制繁雜的相互作用參數而得到，因此該方案具有很大的實際應用價值。
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