... and is mainly associated with the interaction of turbulence with the blade surface (Ghasemian, Ashrafi, and Sedaghat, 2017). Mechanical noise can be decreased by some engineering methods, while the reduction of aerodynamic noise is still a problem. revolution wind energy noise prediction rotational...

... diameter flow velocity installation nodule diameter production monitoring coefficient flow rate circular lifting test pump efficiency reservoir surveillance feeder concentration pump revolution efficiency equation lifting test installation head loss production control nodule...

.... BACKGROUND The First Revolution: Diving & Manned subs - 1960's January 1960: Walsh & Piccard to the bottom of the Challenger Deep. Mixed gas diving Hannas Keller/Captain George Bond, USN/Captain Cousteau Manned subs StarI, DOWB, Beaver MKIV, Shelf Diver, Diverlockout SDL-1...

... in the winter of 1987, as shown in Figure 2. wave height incident wave period turbine revolution sustainable development field experiment renewable energy ocean energy air chamber chamber efficiency revolution social responsibility sustainability experiment wave height gage fluctuation...