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电工电气 DLMS Color Book
DLMS
 编辑
本词条缺少名片图，补充相关内容使词条更完整，还能快速升级，赶紧来编辑吧！
配电线报文规范(Distribution Line Message Specification) [IEC 62056-53]是应用层规范，独立于应用层以下的各个低层，因而也就与通信信道无关，设计用于在计算机集成环境中支持与（能量）分配设备间的 ...
书籍 Dynasty Maxstar 350 700
Dynasty 350, 700
208/575 Volt Models W/Auto-Line
Maxstar 350, 700
File: TIG (GTAW)
Including Optional Cart And Cooler
CE And Non-CE Models
电路图 稳压电源5V转3.3VPCB原理图
J1为Line input 5V，两个104电容为滤波电容，引脚分别接地，主要滤掉高频纹波，防止自激振荡；47UF和100UF为滤波电容，主要滤掉低频纹波；R1作限流作用以保护稳压二极管D2，当输入电压和输出负载电流发生变化时R1通过本身压降的变化，来调节稳压二极管D2的工作电流，从而起到稳压作作用。 ...
教程 驱动器123
ble Logic Controller，可编程逻辑控制器，一种数字运算操作的电子系统，专为在工业环境应用而设计的。它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算，顺序控制，定时，计数与算术操作等面向用户的指令，并通过数字或模拟式输入/输出控制各种类型的机械或生产过程。是工业控制的核心部分。 另外PLC还有 ...
书籍 3G,+4G+and+Beyond–BRINGING NETWORKS
In recent years, cellular voice networks have transformed into powerful packet-switched
access networks for both voice communication and Internet access. Evolving Universal
Mobile Telecommunication System (UMTS) networks and first Long Term Evolution
(LTE) installations now deliver bandwidths of sev ...
书籍 Microwave+Line
Fordecades,microwavelineofsight(LOS)linkshavebeenoneofthebasictechnolo-
gies used to build telephone networks. Until 1980, the fast rollout of high capacity
transport networks and deployment of links in areas with challenging geographic
characteristics could not be understood without this technology ...
书籍 Mobile+and+Wireless+Communications
One of the very first books published on the social impact of the mobile phone
was Timo Kopomaa’s The City in Your Pocket: Birth of the Mobile Information Society.
The book, published in 2000, was based on research that Kopomaa had under-
taken for Nokia and Sonera as part of his doctoral studies i ...
书籍 N-path+Filtering
his research aims at creating broadband tunable, fully integrated filters for the application of
cognitive radio and signal classification receivers. The approach under study is the N-path filter
technique which is capable of translating a baseband impedance to a reference frequency creating
a tunab ...