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  1. 衰减的单位dB是什么意思? - 知乎

    Oct 3, 2013 · 如果我们用dB来表示的话,第一种情况增大了3dB,而第二种情况增大了10.4dB,更能客观地反映出人的感官的感觉特性。 而在电子工程技术领域,dB是国际上统一使用的电信 …

  2. File extension .DB - What kind of database is it exactly?

    12 If you're on a Unix-like platform (Mac OS X, Linux, etc), you could try running file myfile.db to see if that can figure out what type of file it is. The file utility will inspect the beginning of the …

  3. 什么是dBm,与dB、dBW的区别? - 知乎

    dB定义为任意两个给定点之间的功率或信号强度之差,而dBm则定义为功率的绝对值或强度,用于确定特定点的信号强度。 与dB不同,dBm是绝对测量单位。 dB代表一个相对数字,表示信号 …

  4. *.db是什么文件,如何打开? - 知乎

    后缀是.db的文件是数据库文件,db是datebase的缩写,datebase的意思就是数据库。 数据库类型包括: 关系数据库 、非关系型数据库(NoSQL) 关系型的有:Oracle,MySQL, …

  5. database - How to open this .DB file? - Stack Overflow

    I have a few database files with .db extension and I want to take a peek. However I don't know what program should I use to open the files. I've found a similar quesiton that says checking …

  6. db是什么意思? - 知乎

    Sep 18, 2021 · dB和dBm的计算 dB的意义在于把一个很大或很小的数比较简短地表示出来,即数值变小,读写方便。 当一个高频线性放大器的输入功率为10W,输出功率为40W时,功率的 …

  7. What is the difference between *.sqlite and *.db file?

    May 1, 2011 · A .sqlite file is as the name implies a file that contains an SQLite database. The .db file extension is used by Oracle, Paradox and XoftSpySE databases. [1] As Christian noted …

  8. what does the assembly instruction 'db' actually do?

    Jun 30, 2013 · I'm a bit confused as to what the asm instruction db actually does. I've read that it defines a byte, but what does that actually mean? Does it move the value into a certain place …

  9. 天线里的dBi 是什么意思?和dB、dBm、dBd、dBc有什么关系?

    dB家族中常见的还有dBi、dBd、dBc。 它们的计算方法与dB的计算方法完全一样,表示的还是功率的相对值。 不同的是,它们的参考基准不同,即分母上的参考功率P0所代表的含义不同。 …

  10. What role do I need to assign to my user to read and write to my ...

    Nov 25, 2022 · This should be possible with the ' Cosmos DB Account Reader Role ' and ' DocumentDB Account Contributor ' roles. From docs, regarding the contributor role : Can …