???

??????????????????
??????????????????P??P-R??PQRS????P-R????PQRS??????P-R??PQRS??PQRS?????????????????????????????????????
????????????????
??????????????????????

??N???????????????????????????? [?]???????????????????
??????????
??????
????????????
??????
?????
????????
???????? [?]??? [?]?????????...

??????

??????????????????????????????????

?

1?????????????????

2???????

?,???..

????????????????????????????????????????I

??   2010-11-11 16:50 ???   ???  ???

???   2010-11-11 16:52 ???????????????????????????????????

??   2010-11-11 16:55 ?? ??? ??? ???...

      ?????,P-R ??0.24s,??0.65%~1.1%,50 ??1.3%.
 ?,?????8.7%.???,?,?,,????,??,??P-R ?.
??P-R ????,??.?.
???????,????,????4%~15%,??.??,??????,?,.???,??????.????????,???.

??????????????????????????????????????????????????????????????????,?????????
????????????Y??????