拍摄高校体育DV短片常见的声音问题与解决方法

DV是现代数字技术的运用,象征了个人影像时代来临,DV拍摄之风席卷了高校,动感、激烈的高校体育活动与比赛画面是学子的最爱,更是辅助高校体育教师教学的音像课件。然而,在实际拍摄体育DV短片时候,常常对精彩的体育画面情有独钟,而忽视音乐的效果,在播放时出现声音素材不好;声音的失真;声音的断断续续;声音听觉假象;声音高低远近的层次感、空间感被削弱等问题。所以,进行高校体育DV短片拍摄和后期制作时,在追求视觉效果的同时,也要重视体育DV的听觉效果。

Retarded Harrier Maneuver as a New and Efficient Approach for Fixed-Wing Aircraft to Achieve S/VTOL

Modern day VTOL fixed-wing aircraft based on quadplane design is relatively simple and reliable due to lack of complex mechanical components compared to tilt-wings or tilt-rotors in the pre-80’s era. Radio-controlled aerobatic airplanes have thrust-to-weight ratio of greater than unity and are capable of performing a range of impressive maneuvers including the so-called harrier maneuver. We hereby present a new maneuver known as the retarded harrier that is applicable to un/manned fixed-wing aircraft for achieving VTOL flight with a better forward flight performance than a quadplane in terms of weight, speed and esthetics. An airplane with tandem roto-stabilizers is also presented as an efficient airframe to achieve VTOL via retarded harrier maneuver, and detailed analysis is given for hovering at 45° and 60° and comparison is made against the widely adopted quadplane. This work also includes experimental demonstration of retarded harrier maneuver using a small remotely pilot airplane of wingspan 650 mm.