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???????2????????????????????

?????????????????????????2016-08-17

 ???????2,?????????????,?????????????

“???t?”???????????????????????????????????????λ??????????????????ε??50%???????????????????100%??50%??25%??12.5%??6.25%??3.125%??????6??????????????λ??????????????2?????????????仰????????

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??????????????1???????1/2???????У?????????????????Sn=(a1*(1-q)^n)/(1-q)

????n=6,???????????? Sn=63/64

?????????????????????????????????1.5625%

????????????????1.56???????????????

????????????????50W????????????????300%??????????????????????????????15.23??

1.523???????????????

???????2???1—15???????????

???????2???1—13???????????

???????2??????????? ????1-13???????????

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