eDSim: fast and powerful electrical simulation software for SMPS and analog ICs Featured Videos See All Limit inrush current in your AC-DC power supply with STEVAL-SCR002V1 The STEVAL-SCR002V1 introduces a simple and innovative AC-DC front-end circuit that allows the designer to perform an...
> db.inventory.distinct(“dept”) //获取dept字段的不重复值 结果:[“A”,”B”] > db.inventory.distinct(“item.sku”)//获取item子字段sku的不重复值 结果:[“111”,”222”,”333”] >db.inventory.distinct(“sizes”)//获取数组格式字段的不重复值 结果:[“M”,”S”,”L”] >db.inventory...
in municipal infrastructure engineering 编号:DB11/T 1842-2021 主编部门:北京市政建设集团有限责任公司 北京住总集团有限责任公司 北京城建科技促进会 批准部门:北京市市场监督管理局 施行日期:2021 年 07 月 01 日 2021 北京 前言 根据北京市市场监督管理局《2019 年北京市地方标准制修订项目计划》(京市监发[...
Verified User in Electrical/Electronic Manufacturing Small-Business(50 or fewer emp.) Validated Reviewer Review source: G2 invite Incentivized Review 7/22/2024 What do you like best about MongoDB? One thing is that its a NOSQL database, meaning no schema required. Also, main thing i liked ...
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RST tsrs CS CCLK CDIN CDOUT tcss tsch tscl tdsu tdh MSB tpd MSB tf2 tr2 tcsh Figure 9. Control Port Timing - SPI Format 22 DS648F5 CS42448 DC ELECTRICAL CHARACTERISTICS AGND = 0 V; all voltages with respect to ground. Parameters Symbol Min Typ Max Units Normal Operation (Note 26) ...
Now,decibel gainis defined in terms of the common (base 10) logarithm of a power ratio that means if the conventional gain of an amplifier is Poutput/ Pinput, then this gain is expressed in decibel scale as 10log(Poutput/ Pinput). ...
db.mycollection.find()实现查找mycollection集合中的所有文档。 注:该方式只适用与shell中 (2)mycollection = db.getCollection("mycollection");mycollection.find()。 该方法可以在JavaScript文件和shell中使用 MongoDB提供了很多方法,用于对集合进行一系列的操作,大家可以点击上面的链接查看最新的方法。
The amplitude ratio in decibels (dB) is 20 times base 10 logarithm of the ratio of V1and V0: RatiodB= 10⋅log10(V12/V02) = 20⋅log10(V1/V0) Decibels to watts, volts, hertz, pascal conversion calculator Convert dB, dBm, dBW, dBV, dBmV, dBμV, dBu, dBμA, dBHz, dBSPL...
ELECTRICAL CALCULATIONS Amps to watts Amps to kW Amps to kVA Amps to volts Amps to mA mA to amps Watts to amps Watts to joules Watts to volts Watts to VA Watts to kVA Watts to lumens Lumens to watts kW to amps kW to kWh kW to VA kW to kVA Volts to amps Volts to joules Volts ...