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PCB评估过程中需要关注哪些因素

PCB评估过程中需要关注哪些因素PCB评估过程中需要关注哪些因素PCB评估过程中需要关注哪些因素
2024-08-29 02:50:05 下载 7 查看 1,080
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内窥镜图案工作站说明 文档 应用程序

内窥镜图案工作站说明 文档 应用程序
2015-10-09 20:11:01 下载 153 查看 1,054
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任何给一些数一个和,算出这些可以哪些方式计算得到这个和的算法.

任何给一些数一个和,算出这些可以哪些方式计算得到这个和的算法.
2014-01-05 16:48:07 下载 172 查看 1,068
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please download this file if you want to know learn more about crypt

please download this file if you want to know learn more about crypt
2015-07-19 20:28:01 下载 192 查看 1,077
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Must know for QF engineers

Must know for QF engineers
2016-07-04 10:02:01 下载 54 查看 1,075
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IEC 61850: WHAT YOU NEED TO KNOW ABOUT FUNCTIONALITY AND PRACTICAL IMPLEMENTATION

IEC 61850: WHAT YOU NEED TO KNOW ABOUT FUNCTIONALITY AND PRACTICAL IMPLEMENTATION
2014-01-13 10:12:01 下载 177 查看 1,064
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inverted pendulum pid controller matlab files used to know the controller description

inverted pendulum pid controller matlab files used to know the controller description
2017-05-02 10:57:02 下载 69 查看 1,103
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this is for the AT commands in the used in delivery report using this your modem has to know the spe

this is for the AT commands in the used in delivery report using this your modem has to know the specific
2014-01-23 00:54:21 下载 60 查看 1,088
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J2Me polish..all you want to know

J2Me polish..all you want to know
2013-12-29 08:56:02 下载 56 查看 1,059
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一个检查当前系统中有哪些进程在运行

一个检查当前系统中有哪些进程在运行,并且显示对应进程的名称、说明和备注,本工具无需注册、安装。
2017-02-14 10:39:01 下载 113 查看 1,057
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做DSP之前我们该弄明白哪些基本问题

white-space:pre-wrap;background-color:#F8F8F8;">以数字信号处理器(DSP)为核心的实时数字信号处理技术正在迅猛发展,各种类型的DSP分别适应了不同领域的应用要求
2015-06-01 14:20:16 下载 4 查看 34
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分解OBD接口能到采集哪些具体的车辆数据

车载OBD到底什么作用?
2022-12-26 22:40:02 下载 3 查看 8,943
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增量旋转编码器选型哪些注意事项? 应注意三方面的参数: 1. 械安装尺寸

增量旋转编码器选型哪些注意事项? 应注意三方面的参数: 1. 械安装尺寸,包括定位止口,轴径,安装孔位;电缆出线方式;安装空间体积;工作环 境防护等级是否满足要求。 2.
2014-01-12 19:23:13 下载 39 查看 1,070
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about IBM os/390 knowlege,you can know history about mainframework

about IBM os/390 knowlege,you can know history about mainframework
2015-08-20 00:44:02 下载 45 查看 1,086
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do u know what computer network is ?this book can explain for u clearly

do u know what computer network is ?this book can explain for u clearly
2013-12-02 20:22:01 下载 172 查看 1,118
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all about sweden its ppl stuff economy and everything one needs to know

all about sweden its ppl stuff economy and everything one needs to know
2017-05-11 20:17:01 下载 118 查看 1,083
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this is a PL0 program, i wrote, but i don t know, is it correct

this is a PL0 program, i wrote, but i don t know, is it correct
2017-08-23 00:00:02 下载 86 查看 1,099
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But How Do It Know,介绍计算机底层原理的书籍

一本介绍计算机底层原理的书籍,从逻辑门开始构建一台计算机!

2022-04-30 07:30:02 下载 19 查看 8,793
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allegro 需要导出哪些文件嘉立创才能自动识别

allegro 需要导出哪些文件嘉立创才能自动识别
2020-10-12 16:13:29 下载 6 查看 147
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高速PCB设计中的阻抗匹配 你都知道哪些

阻抗匹配是指在能量传输时,要求负载阻抗要和传输线的特征阻抗相等,此时的传输不会产生反射,这表明所有能量都被负载吸收了。反之则在传输中有能量损失。在高速线路板打样设计中,阻抗的匹配与否关系到信号的质量优劣。

1、PCB走线什么时候需要做阻抗匹配?

不主要看频率,而关键是看信号的边沿陡峭程度,即信号的上升/下降时间,一般认为如果信号的上升/下降时间(按10%~90%计)小

2022-09-09 08:00:02 下载 2 查看 5,228
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