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  1. ...時,空氣的壓縮性則變得很重要。一般均將自由流的馬赫數區分為臨界馬赫數( critical Mach number ),次臨界馬赫數(subcritical Mach number )及超臨界馬赫數(supercritical...

  2. ... improvements in internalizing and critical pathology problem domains but remained the same... behaviors and total problem score. The number of previous out-of-home placements was positively...

  3. 福祿數(Froude number ):式中U為流體速度,L為物體特徵長度...流速緩慢,水深大的流況;當Fr = 1為臨界流( Critical flow)。在波浪力學中,福祿數代表平均流速與重力波...