Wireless Mesh Networks (WMN) are believed to be a highly promising technology and will play an increasingly important role in future generation wireless mobile networks. WMN is characterized by dynamic self-organization, self-configuration and self-healing to enable quick deployment, easy maintenance, low cost, high scalability and reliable services, as well as enhancing network capacity, connect- ivity and resilience.
标签: Networking Wireless Mesh
上传时间: 2020-06-01
上传用户:shancjb
Introduction to Radio Frequency Identification (RFID): RFID is a wireless modulation and demodulation technique for automatic identification of objects, tracking goods, smart logistics, and access con- trol. RFID is a contactless, usually short‐distance transmission and reception technique for unique ID data transfer from a tagged object to an interrogator (reader). The generic configuration of an RFID system comprises (i) an ID data‐carrying tag, (ii) a reader, (iii) a middleware, and (iv) an enterprise application.
标签: Chipless_Radio_Frequency_Identifi cation
上传时间: 2020-06-08
上传用户:shancjb
mosfet并联使用介绍了并联使用的注意事项,特别注意避开Vgsth zero thermal coefficient以下的正温特性设计
上传时间: 2022-03-01
上传用户:bluedrops
华为AI安全白皮书2018-cn近年来,随着海量数据的积累、计算能力的发展、机器学习方法与系统的持续创新与演进,诸如图像识别、语音识 别、自然语言翻译等人工智能技术得到普遍部署和广泛应用。越来越多公司都将增大在AI的投入,将其作为业务发展 的重心。华为全球产业愿景预测:到2025年,全球将实现1000亿联接,覆盖77%的人口;85%的企业应用将部署到 云上;智能家庭机器人将进入12%的家庭,形成千亿美元的市场。 人工智能技术的发展和广泛的商业应用充分预示着一个万物智能的社会正在快速到来。1956年,麦卡锡、明斯基、 香农等人提出“人工智能”概念。60年后的今天,伴随着谷歌DeepMind开发的围棋程序AlphaGo战胜人类围棋冠 军,人工智能技术开始全面爆发。如今,芯片和传感器的发展使“+智能”成为大势所趋:交通+智能,最懂你的 路;医疗+智能,最懂你的痛;制造+智能,最懂你所需。加州大学伯克利分校的学者们认为人工智能在过去二十年 快速崛起主要归结于如下三点原因[1]:1)海量数据:随着互联网的兴起,数据以语音、视频和文字等形式快速增 长;海量数据为机器学习算法提供了充足的营养,促使人工智能技术快速发展。2)高扩展计算机和软件系统:近 年来深度学习成功主要归功于新一波的CPU集群、GPU和TPU等专用硬件和相关的软件平台。3)已有资源的可获得 性:大量的开源软件协助处理数据和支持AI相关工作,节省了大量的开发时间和费用;同时许多云服务为开发者提供 了随时可获取的计算和存储资源。 在机器人、虚拟助手、自动驾驶、智能交通、智能制造、智慧城市等各个行业,人工智能正朝着历史性时刻迈进。谷 歌、微软、亚马逊等大公司纷纷将AI作为引领未来的核心发展战略。2017年谷歌DeepMind升级版的AlphaGo Zero横 空出世;它不再需要人类棋谱数据,而是进行自我博弈,经过短短3天的自我训练就强势打败了AlphaGo。AlphaGo Zero能够发现新知识并发展出打破常规的新策略,让我们看到了利用人工智能技术改变人类命运的巨大潜能。 我们现在看到的只是一个开始;未来,将会是一个全联接、超智能的世界。人工智能将为人们带来极致的体验,将 积极影响人们的工作和生活,带来经济的繁荣与发展。
上传时间: 2022-03-06
上传用户:
大家先试用一下,源码后面奉上!!!using System;using System.Collections.Generic;using System.Configuration;using System.Data;using System.Linq;using System.Threading.Tasks;using System.Windows;namespace SerialCom{ /// <summary> /// App.xaml 的交互逻辑 /// </summary> public partial class App : Application { }}
标签: 串口调试
上传时间: 2022-03-25
上传用户:kent
随着光伏发电系统快速发展,以及电动汽车充电桩的普及,传统的剩余电流保护器无法满足实际需求。介绍了一款B型剩余电流保护器,采用磁调制剩余电流互感器和零序电流互感器采集剩余电流。根据GB/T 22794—2017标准要求,可识别1 kHz及以下的正弦交流、带和不带直流分量的脉动直流、平滑直流等剩余电流信号。经信号调理电路将电压信号送到单片机进行采集和判断。通过试验测试,该样机在测试精度和速度上均符合国家标准的相关要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
标签: 电流保护器
上传时间: 2022-03-27
上传用户:
针对交流电路过零检测电路存在结构复杂、过零点检测不准确、编程繁琐等问题,设计了一种基于LM339的硬件结构简单的过零检测电路。通过仿真软件Mulisim对该设计电路进行了仿真,实验证明了该方案过零检测的可行性、稳定性和可靠性,可直接作为交流电路中CPU的过零信号。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.
上传时间: 2022-05-03
上传用户:
本文提出基于AD2S1210的旋变信号转换电路,给出了具体的电路实现方法和配置方法.相比以往的RDC方案,本系统具有精度高,设计灵活,可靠性高等特点,可广泛应用于各种伺服系统中.In this paper, the switching signal conversion circuit based on ADS1210 is proposed, and the specific circuit implementation and configuration method are given. Compared with the previous RDC scheme, this system has the characteristics of high precision, flexible design and high reliability, and can be widely used in various servo systems.
标签: ad2s1210
上传时间: 2022-05-04
上传用户:
The JW® 7805 is a low noise low-dropout (LDO) voltage regulator with enable function that operates from 1.8V to 5.5V. It provides up to 300mA of output current and offers low-power operation in miniaturized packaging. JW7805 supports fixed output voltage 0.9V, 1.0V, 1.05V, 1.1V,1.2V, 1.3V, 1.35V, 1.5V, 1.8V, 1.85V, 2.1V, 2.2V, 2.3V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V,3.1V, 3.3V, 3.6V, 4.2V, 4.4V and 5.0V. The features of low quiescent current as low as 6uA and almost zero disable current are ideal for powering the battery equipment. JW7805’s low output noise and high PSRR are also friendly to RF systems.
标签: JW7805
上传时间: 2022-05-06
上传用户:slq1234567890
Chapter 1:Introduction and Overview Chapter 2:Switches,Buttons,and Knob 开关按钮Chapter 3:Clock Sources 时钟脉冲源Chapter 4:FPGA Configuration Options 配置Chapter 5:Character LCD Screen LCD显示屏特性Chapter 6:VGA Display Port VGA接口——接到显示器上Chapter 7:RS-232 Serial Ports RS-232接口——接器件Chapter 8:PS/2 Mouse/Keyboard Port PS/2鼠标键盘接口Chapter 9:Digital to Analog Converter(DAC)D/A接口Chapter 10:Analog Capture Circuit 模拟捕获电路Chapter 11:Intel StrataFlash Parallel NOR Flash PROM Chapter 12:SPI Serial Flash 串行外围接口系列闪存Chapter 13:DDR SDRAM 内存Chapter 14:10/100 Ethernet Physical Layer Interface以太网物理层接口Chapter 15:Expansion Connectors 扩展接口Chapter 16:XC2C64A CoolRunner-II CPLDChapter 17:DS2432 1-Wire SHA-1 EEPROMSpartan-3E入门实验板使设计人员能够即时利用Spartan-3E系列的完整平台性能。设备支持:Spartan-3E、CoolRunner-ll关键特性:Xilinx器件:Spartan-3E(50万门,XC3S500E-4FG320C),CoolRunnerTM-lI与Platform Flash时钟:50MHz晶体时钟振荡器存储器:128Mbit 并行Flash,16 Mbit SPI Flash,64MByte DDR SDRAM连接器与接口:以太网10/100Phy,JTAG USB下载,两个9管脚RS-232串行端口,PS/2类型鼠标/键盘端口,带按钮的旋转编码器,四个滑动开关,八个单独的LED输出
标签: Spartan-3E
上传时间: 2022-06-19
上传用户:kingwide