The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.That's a heterodyne receiver.那是外差式接收机.Function test and calibration self - heterodyne curve for direction finder on sea trial....
How about for those select few who possess the predispositions.至于,为数极少的在这方面有资质的人.Education a fundamental way to enhance the quality of national predispositions.教育是提高国民素质的根本途径.Also Zaller talks a lot about messages that a...
Exxon Mobil Corp. is betting big on China's seemingly endless hunger for fuel.埃克森美孚(ExxonMobil)正对中国似乎永无休止的对燃料的渴求押下重注.Primarily using the Lonworks technology of Echelon corp. and WEB technology of ASP, XML, SQL and.主...