简介：Inunderwatertargetdetection,thebottomreverberationhassomeofthesamepropertiesasthetargetecho,whichhasagreatimpactontheperformance.Itisessentialtostudythedifferencebetweentargetechoandreverberation.Inthispaperbasedontheuniqueadvantageofhumanlisteningabilityonobjectsdistinction,theGammatonefilteristakenastheauditorymodel.Inaddition,time-frequencyperceptionfeaturesandauditoryspectrafeaturesareextractedforactivesonartargetechoandbottomreverberationseparation.Thefeaturesoftheexperimentaldatahavegoodconcentrationcharacteristicsinthesameclassandhavealargeamountofdifferencesbetweendifferentclasses,whichshowsthatthismethodcaneffectivelydistinguishbetweenthetargetechoandreverberation.

简介：Z750R将新潮时髦的造型和体贴柔顺的操控性能融为一体，以“外冷内热”的性格获得了很多骑手的青睐，2011年新问世的Z750R，不仅仅是在Z750后面增加一个“R”字母，

简介：速度、激情与水相遇，就是水上F1。马达轰鸣，急速狂飙，陆地F1拥有的魅力，水上F1一样不缺。而且，它还有旖旎水景和身材火辣的赛艇宝贝夺取眼球。2011赛季开战在即，中国队再度集结，一场缤纷好戏趔界水上巡回之旅即刻开始。