???dBm??dB?dBW???? - ??
...dB????????????????????????dBm??????????????????????????? ?dB???dBm???????? dB?????????????????????? dBm??????????1mw???????????...
https://www.zhihu.com/tardis/zm/art/385519277
?????dB?????? - ??
...?????dB??????????????3dB??????????10.4dB??????????????????? ???????????dB????????????????...
https://www.zhihu.com/question/21743572
db?????? - ??
...dB ?????????????????????????????dB,dBc? dBm?????????????????????????????????????????? ???dB?dBm? dB ????????????????????A??????B??????dB??????10 lg A/B??? dBm ......
https://www.zhihu.com/question/487738191
?????dB? - ????
...???dB???????????????????30dB???10dB+20dB??3*10=30?? ????dB??????????????dB??????????????...
https://zhidao.baidu.com/question/1315787933976422899.html
*.db??????????? - ??
...???.db??????????db?datebase????datebase????????? ???????? ??????????????NoSQL? ??????Oracle? MySQL? SQLServer ? ?????? Redis?mongoDB ??????????????????????Navicat?????...
https://www.zhihu.com/question/295711712
????dB?dBm?dBw?w?????_????
...????dB?dBm?dBw?w???????????dB?????????????dBm?dBw?W??????????????????????????????????????????????1 dBm??1???mW???...
https://zhidao.baidu.com/question/1394496261269084780.html
db???? - ????
...dB????????????????????? 1. 1 dB = 1.1 ??2 dB = 1.25??3 dB = 1.4??6 dB = 2 ??10 dB = 3 ??20 dB = 10 ??30 dB = 30 ???????????????????? (??? ? 6 dB ?? 1/2 = 0.5) 2. ????????????dB????? ?? ?????? ???40 dB = 20dB + 20 dB = 10 * ......
https://zhidao.baidu.com/question/2279019199463538228.html
????. db??? - ????
...???.db???????????? ????????????? SQLite?????????? SQLite?????? ? DB Browser for SQLite ?????????????????????.db???????????????? ??Microsoft Access? ??.db???? Microsoft Access ?????????Microsoft ......
https://zhidao.baidu.com/question/1895982171701587868.html
???db???????????_????
...???? ??????????????????????????DB???????????????????????????????????2MB????????????????????????...
https://zhidao.baidu.com/question/437994047800799532.html
DB??????????????_????
...DB??????????????DB???????????????????????????????DB????????DB??????DB????????????????????????????????????...
https://zhidao.baidu.com/question/637664982846347804.html