Doppler very high frequency omni - directional range and distance measuring equipment ( dvordme ) system standard icao radio navigational aids used to provide bearing and distance information to aircraft and to define air traffic control routes for en - route , terminal and instrument approachdeparture procedures 這是國際民航組織指定的標(biāo)準(zhǔn)無線電導(dǎo)航設(shè)備,可向航機提供方向及距離的資料,并可以確定航路、終端區(qū)程序、儀表進場及離場程序等。
There are many factors that may affect the aircraft s flown track - the wind speed and direction relative to the aircraft s intended flight path , the performance characteristics of the aircraft , tolerances in navigational aids and different piloting skills and techniques etc . in practice , the flown tracks may deviate either side of the nominal centre line shown in the map in 飛行中的飛機不能如火車般緊貼路軌行走。飛機在飛行中會受多方因素影響:這包括相對于飛行航道的風(fēng)速及風(fēng)向、飛機的操作性能、導(dǎo)航儀器的偏差、機師駕駛技巧等。基于以上原因,實際的飛行航道可能有別于
However , at present in china civil aviation industry , the flight procedure design for terminal airspace is still in its early stage , with existing problems , such as too many navigational aids , inefficient use of navigational aid frequency , and low adaptability of flight procedure 針對我國目前機場空域飛行程序設(shè)計還處在推廣階段這一情況,存在著諸如導(dǎo)航設(shè)施過多、導(dǎo)航臺頻率浪費嚴(yán)重、飛行程序適應(yīng)性較差等缺陷,研究基于同一vor / dme導(dǎo)航設(shè)施機場空域飛行程序設(shè)計,具有較強的現(xiàn)實意義。
In the paper a concept of ship domain was introduced and the inland water ship 3d domain model was presented . as a case study the model under environmental stress in the bridge water area was studied . it is expected to be a new approach and theory for the setting of obstruction easing facilities such as navigational aids in the bridge water area 在此過程中,論文通過引入海上船舶避碰領(lǐng)域的概念,探索并首次提出了內(nèi)河船舶三維領(lǐng)域的觀點,并在此基礎(chǔ)上對橋區(qū)壓力環(huán)境下的船舶三維領(lǐng)域模型做了較為深入的探索和研究,從而有望為橋區(qū)水域航標(biāo)等礙航緩解設(shè)施的設(shè)置提供一種可行的新的理論依據(jù)。