根据第一段最后一句“Theyalsofoundthattheimpactofaerodynamicsdependsonthesizeoftheflyinggroup-benefitingsmallgroupsanddisturbinglargeones.(他们还发现,空气动力学的影响取决于飞行群体的规模——使小群体受益,使大群体不安。)”可知,纽约大学的研究人员对鸟类研究的重点是空气动力学对鸟类群体的影响。故选D。2.【答案...
They also found that the impact of aerodynamics depends on the size of the flying group-benefiting small groups and disturbing large ones.To mimic(模仿) the flying patterns of birds in which they line up one directly behind the other, the researchers created mechanized wings. They were 3D-...
Aerodynamics arose as an independent science at the beginning of the 20th century in connection with the demands of aviation. In this new field, a theory and methods were required for calculating the lift force of a wing, the aerodynamic drag of an aircraft and its parts and the thrust of ...
boats, and planes. In theory, the laws of fluid dynamics (of which aerodynamics is a part) apply in much the same way, whether you're speeding over salt flats in a rocket-propelled car, skimming over the waves in a hydrofoil boat
But there's a second way in which traveling at high speed can counteract gravity. It was discovered byIsaac Newtonin the 17th century, long before the science of aerodynamics was born. In fact, Newton ignored atmospheric effects altogether and simply wondered what would happen if a cannonball ...
Various improvements were incorporated over the years to increase the payload, improve the aerodynamics and update the engines. Powered by 2 Rolls-Royce Dart turboprops, the 748 had a ceiling of 25,000ft and a range of just over 700 miles when fully loaded with 58 passengers and a flight ...
The study of aerodynamics dates back to the 18 th century. Sir Isaac Newton is the first person to have developed an air resistance theory in 1726. Twelve years later Daniel Bernoulli, a Dutch-Swiss mathematician, identified the relationship between pressure, density, and flow velocity. Today, ...
Instead, to arrive at the new model, the team analyzed the interaction of airflow and turbines using detailed computational modeling of the aerodynamics. They found, for example, that the original model had assumed that a drop in air pressure immediately behind the rotor would rapidly return to...
aerodynamicsvortexmodelnearwakemodelaerodynamicdampingindicialfunctionA near wake model for trailing vorticity originally proposed by Beddoes for high-resolution helicopter blade vortex interaction computations has been implemented and compared with the usual blade element momentum models used for wind turbine ...
2.A force, especially political, social, or psychological:the main dynamic behind the revolution. [Frenchdynamique, from Greekdunamikos,powerful, fromdunamis,power, fromdunasthai,to be able; seedeu-inIndo-European roots.] dy·nam′i·cal·lyadv. ...