threshold velocity 中文意思是什麼
threshold velocity
解釋
泥沙的啟動流速-
This paper analyzes the percolation mechanism and characteristics of gas under low - velocity percolation state in terms of slippage effect and threshold pressure effect by using molecular dynamics, thermodynamics and percolation mechanics in order to understand the practical reason of low - velocity non - darcy percolation
摘要為明確氣體在低速滲流狀態下的滲流規律以及產生低速非達西滲流的實質性原因，運用分子動力學、熱力學和滲流力學等相關知識，基於滑脫效應和閾壓效應兩方面分析了氣體在低速滲流狀態下的滲流機理及滲流特徵。 -
Based on these foundations, we give a perfect scheme of the bbo opos : single pass amplification coefficient of the opg under different pump intensity is calculated ; collinear type - i and type - ii phase matching tuning curve pumped by the q switch nd : yag various harmonics as well as noncollinear type - i tuning curve are calculated in details ; the effect of the walkoff for the nonlinear effect coefficient and the group velocity matching are analyzed ; the acceptance angle in parametric process is calculated ; the numerical threshold of the bbo opo is calculated ; the process of the saturation and depletion of the pump beam are analyzed ; the relationship of the conversion efficiency and reflectance of output mirror are discussed ; various linewidth controlling methods are discussed ; the improvement of the beam quality applying the unstable cavity is discussed ; and the crystal bbo design is considered
在此基礎上，給出了一整套bbo - opo激光參數設計方案：計算了不同泵浦強度下的參量放大倍數；詳細計算了在nd : yag調q激光器各次諧波泵浦條件下的共線類和類相位匹配的調諧曲線，以及非共線類相位匹配調諧曲線；分析了走離角對非線性系數和群速匹配的影響；計算了參量過程的允許角；計算了bbo - opo的理論閾值條件；分析了飽和與泵浦光束的消耗過程；給出了轉換效率與超過泵浦閾值的倍數的關系；討論了轉換效率與輸出鏡反射率的關系；討論了線寬控制的各種方法；研究了利用非穩腔改善光束質量的方法；考慮了bbo晶體的設計。 -
Adopting the amendatory rate equation, the threshold of the micro - cavity has been studied and the conclusion is shown as following : if there is not non - radiation transition, the pump velocity just need to compensate the photon velocity escaped from the cavity, and the intensity of output light will direct ratio to the intensity of input light then we got a micro - cavity laser with no threshold
採用修正的速率方程對微腔激光器的閾值進行研究，得到如下結論：在沒有無輻射躍遷時，激光器的泵浦速率只需恰好補償光子向腔外的逃逸速率，輸出光強隨著輸入泵浦光強性線增加，實現所謂的「無閾值」激光器。 -
And the conclusion is that vita method is a more reasonable method in burst detection when the threshold value is between 0. 7 to 1. 0. in order to investigate the influence of transverse curvature of the wall, the direct numerical simulated data bank of turbulent channel flow is also analyzed. the mean velocity profile in pipe and channel flow is compared
本文還對圓管和槽道內的猝發事件進行了分析，得到的圓管和槽道內的猝發周期大致是相同的，但是在猝發的強度上槽道要大於圓管；並且進一步的分析表明猝發強度的差別主要在於徑向速度的差別，這說明壁面橫向曲率對于徑向的流動影響較大，而對流向流動幾乎沒有影響。 -
Based on bidirectional call - overflow scheme, the author then analyzes the velocity threshold and the maximum mobile velocity ' s influence on the system gos. that is, when the teletraffic is in a certain range, both increasing the velocity threshold and decreasing the maximum velocity can reduce the unsuccessful probability of calls
在雙向呼叫溢出方案的基礎上，作者分析了速度門限和移動臺最高速度對系統gos的影響，即當呼叫流量在一定范圍內時，提高速度門限和降低移動臺的最高速度均能減小呼叫的失敗概率。 -
The anti - lock braking processes based on logic threshold control are simulated in the environment of matlab / simulink software. the influences on logic threshold control abs by the factors such as road condition, initial velocity, the changing rate of braking torque, delay time, inertia and load are discussed at the same time
運用matlab simulink軟體，對基於邏輯門限控制方法的防抱制動過程進行了計算機模擬，並分析了路面、初速、制動力矩變化率、延遲時間、轉動慣量及載荷等因素對邏輯門限控制abs的影響。 -
The results indicate that the flow velocity is lower and the pressure is high in majority of the step cylinder, the distinct variations of the flow field occur in the threshold of the step cylinder at the bottom and the abrupt transition sections, the holes in the inner and outer tubes and the exhaust hole
結果表明：步進缸內大部分區域流體流速較小，壓力較高，且變化不大，發生明顯變化的部位主要分佈在步進缸底部水管入口及截面突變處、內外套對孔處和排氣孔處。 -
A mathematical model and its simulation model of fuzzy control based on wheel acceleration and deceleration logic threshold control are presented. a concept of reference velocity is introduced, and a fuzzy rule control table is established
建立基於車輪加減速度門限值的abs模糊控制器的數學模型和模糊控制模擬模型，給出參考車速概念和模糊控制規則表，並對takagisugeno推理的abs模糊控制系統進行了模擬。
分享友人