简介:1.航海教育立法研究;2.新时代中国航海教育发展战略;3.航海教育的内涵、功能与定位研究;4.航海类专业新工科建设研究;5.基于工程教育专业认证的专业建设研究;6.航海教育管理体制改革研究;7.航海类专业教学质量(航海人才培养质量)评价体系研究;8.高校管理体制机制改革研究;9.海员培训与发证制度改革研究.
简介:Inunderwatertargetdetection,thebottomreverberationhassomeofthesamepropertiesasthetargetecho,whichhasagreatimpactontheperformance.Itisessentialtostudythedifferencebetweentargetechoandreverberation.Inthispaperbasedontheuniqueadvantageofhumanlisteningabilityonobjectsdistinction,theGammatonefilteristakenastheauditorymodel.Inaddition,time-frequencyperceptionfeaturesandauditoryspectrafeaturesareextractedforactivesonartargetechoandbottomreverberationseparation.Thefeaturesoftheexperimentaldatahavegoodconcentrationcharacteristicsinthesameclassandhavealargeamountofdifferencesbetweendifferentclasses,whichshowsthatthismethodcaneffectivelydistinguishbetweenthetargetechoandreverberation.
简介:长江口海运历史绵远,优势独具,这才成为下西洋船队的航海出发地。夏原吉治水,"制淞通娄",娄江口水势骤增,造就了刘家港,而郑和下西洋远航从这里始发也取得了丰厚的收获。