-> dB
dBͨ^ίȬ
rg2014-1-4 20:02:33 dBt(y)Ժ
ܶļ߶dzĺԼļ܉ܴ_ԼļǷ˂ͲȥίôdBͨ^ίȬ?dB@_ٵļߣ҂ҪԔĽBһ°dBͨ^ίȬϣ
ڰdBίһҪƌWMУǧfäĿyͶt(y)taܶĺ°dB߲ĐôdBͨ^ίȬ?
ίdBęָίdBڻ߁fPĵĿίЧĺcPϵdBЧĿcxt(y)ԺԼίPί^ѭίԭtҲкܴP(lin)Ҟ҂BİdBίԔ£
1)ίdBxҎ(gu)İdBίt(y)Ժ
xҎ(gu)t(y)ԺίdBǺPIġֻҎ(gu)t(y)Ժſܞ黼ṩίlt(y)߀t(y)O䣬ֻҎ(gu)t(y)ԺŸб@ӌdBίܸЧdBͨ^ίȬ?ǧfŽ^t(y)VЩǴίdBĻ_˵İё͛]аտƌWίdB
2)ίdBҪкܺõď
ڰdBί^Щ˕xyaoί@ЩߑԳֲgҎ(gu)ɷyaoԱCyaoһֱ̎ЧԾS֯ЧҎ(gu)tyaoDzܿưl(f)ҪԭڷyaogҪȥt(y)ͲѪyaoѪҎ(gu)ιܵʹt(y)˽ⲡMչ{yao
3)ίdBҪ֮Ժ
dBBίһL^̣߱t(y)֮ԺdBͨ^ίȬ?һڰl(f)ȫ25ٸwl(f)X늈DcCϿ]ǷֹͣίвSYίt°dBl(f)ߕl(f)dBm(x)B(ti)
4)ίdBҲעʳԼ{ء
dBTl(f)ͬӰʳԼwʳõB(ti)ҲodBί°빦ЧLҪl(f)F(xin)ίcħ(zhn)ěQeOt(y)ίK(zhn)ٲħȡÄ
σݾǰdBͨ^ίȬĽBڰdB˂ҪdzҕҪ@Щ_҂߅dzļÿһܕo˂Σ҂Ҫ҂߅@ЩAڰdBκΆ}ֱԃ҂ČңҕoMĻش
аdBĆ}ՈԃھҞ