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论文 wavelet and field forecast verification
Current field forecast verification measures are inadequate, primarily because they compress the comparison
between two complex spatial field processes into one number. Discrete wavelet transforms (DWTs) applied to
analysis and contemporaneous forecast fields prove to be an insightful approach to ve ...
技术资料 无线石墨烯电热膜加热器的设计
设计了一种无线石墨烯电热膜加热器.该系统以石墨烯电热膜为加热源,以STC12C5A60S2单片机为控制核心,基于SIM900A的GSM模块和蓝牙通信模块,利用手机可以实现无线温度控制.实验测试结果表明,每平方米面积的石墨烯电热膜可以为4.0 m^3体积的室内环境供暖.将环境温度从15℃加热到20℃只用了1.94 min.该系统可实时检测温度,并且能 ...
技术资料 非接触式IC卡射频识读器的设计与实现
针对接触式IC卡技术的接触问题以及有源工作,采取射频识别技术与IC卡技术相结合的方法,解决了IC卡技术接触性的问题,实现IC卡的非接触使用与无源工作的功能,并在此基础上附加语音播报功能。文章主要研究的带语音功能的识读器是以射频识别技术为基础,MIFARE卡作为识读器识别的对象、根据ISO14443A协议、采用非接触式IC卡常用的 ...
技术资料 基于51单片机的智能晾衣架系统设计
物联网技术的飞速发展,使得智能家居的概念迅速普及。本设计以AT89C51单片机为主控芯片,以温湿度传感器和光敏电阻作为检测模块,通过对周围环境参数的分析,利用电机控制模块驱动衣架实现自动晾晒收回的自动晾衣架系统。本设计可满足不同地域、不同季节的晒衣需求,具有较强的稳定性和实用性。With the rapid development of In ...
资料/手册 LM621无刷电机换向器
General Description
The LM621 is a bipolar IC designed for commutation of
brushless DC motors. The part is compatible with both
three- and four-phase motors. It can directly drive the power
switching devices used to drive the motor. The LM621 provides
an adjustable dead-time circuit to eliminate ``s ...
电源技术 利用高压看门狗定时器加强汽车安全系统
 
Abstract: As electronic systems take over many of the mechanical functions in a car—ranging from engine timing to steering andbraking—there is a growing concern about fault tolerance. There should not be a single point of failure that would prevent a car fromat least "limping" ...
单片机编程 PICkit™ 2 Microcontrolle
PICkit™ 2 Microcontroller Programmer USER’S GUIDE
This chapter contains general information that will be useful to know before using thePICkit™ 2 Microcontroller Programmer. Items discussed in this chapter include:• Document Layout• Conventions Used in this Guide• Warr ...
教程资料 XAPP228 -Virtex器件内的四端口存储器
This application note describes how the existing dual-port block memories in the Spartan™-IIand Virtex™ families can be used as Quad-Port memories. This essentially involves a dataaccess time (halved) versus functionality (doubled) trade-off. The overall bandwidth of the blockmemory in ...
通信网络 ISM射频接收器的基带计算
Abstract: Many industrial/scientific/medical (ISM) band radio frequency (RF) receivers use an external Sallen-Key datafilter and a data slicer to generate the baseband digital output. This tutorial describes the ISM-RF Baseband Calculator,which can be used to calculate the filter capacitor values ...
可编程逻辑 XAPP228 -Virtex器件内的四端口存储器
This application note describes how the existing dual-port block memories in the Spartan™-IIand Virtex™ families can be used as Quad-Port memories. This essentially involves a dataaccess time (halved) versus functionality (doubled) trade-off. The overall bandwidth of the blockmemory in ...