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  • j1939 附录a附录b

    j1939 附录a附录b

    标签: j1939

    上传时间: 2022-06-09

    上传用户:

  • 工业仪表显示,收音机LCD驱动,音箱/音响LCD段码屏驱动:VK2C21A/B/C/D(裸片可订货)

    产品型号:VK2C21A/B/C/D 产品品牌:VINKA/永嘉微/永嘉微电 封装形式:SOP28/24/20/16 裸片:DICE(邦定COB)/COG(邦定玻璃用) 产品年份:新年份 联 系 人:许硕  Q Q:191 888 5898 联系手机:18898582398(信) 原厂直销,工程服务,技术支持,价格最具优势!QT459 VK2C21A/B/C/D概述: VK2C21是一个点阵式存储映射的LCD驱动器,可支持最大80点(20SEGx4COM)或者最大128点(16SEGx8COM)的LCD屏。单片机可通过I2C接口配置显示参数和读写显示数据,也可通过指令进入省电模式。其高抗干扰,低功耗的特性适用于水电气表以及工控仪表类产品。 特点: ★  工作电压 2.4-5.5V ★  内置32 kHz RC振荡器 ★  偏置电压(BIAS)可配置为1/3、1/4 ★  COM周期(DUTY)可配置为1/4、1/8 ★  内置显示RAM为20x4位、16x8位 ★  帧频可配置为80Hz、160Hz ★  省电模式(通过关显示和关振荡器进入)

    标签: VK2C21 VK2C21A VK2C21B VK2C21C VK2C21D LCD抗干扰段码屏驱动 段码屏驱动抗干扰

    上传时间: 2022-06-09

    上传用户:2937735731

  • NTC计算公式 温度公式B值计算法

    描述了NTC使用B值计算出实际温度与输出的电压之间的关系。

    标签: ntc计算

    上传时间: 2022-06-15

    上传用户:

  • Quectel Wireless Solutions BC20-TE-B 原理图 V1.2

    BC20-TE-B NB-Iot 评估板评估板原厂原理图V1.2。完整对应实物装置。

    标签: BC20 NB-Iot Quectel

    上传时间: 2022-06-17

    上传用户:

  • ASR M08-B资料

    ASR M08-B设置软件 V3.2  arduino 2560+ASRM08-B测试程序  arduino UNO+ASRM08-B测试程序语音控制台灯电路图及C51源码(不带校验码) 继电器模块设置。   ASR M08-B是一款语音识别模块。首先对模块添加一些关键字,对着该模块说出关键字,串口会返回三位的数,如果是返回特定的三位数字,还会引起ASR M08-B的相关引脚电平的变化。【测试】①打开“ASR M08-B设置软件 V3.2.exe”。②选择“串口号”、“打开串口”、点选“十六进制显示”。③将USB转串口模块连接到语音识别模块上。接线方法如下:语音模块TXD --> USB模块RXD语音模块RXD --> USB模块TXD语音模块GND --> USB模块GND语音模块3V3 --> USB模块3V3(此端为3.3V电源供电端。)④将模块的开关拨到“A”端,最好再按一次上面的大按钮(按一次即可,为了确保模块工作在正确的模式)。⑤对着模块说“开灯”、“关灯”模块会返回“0B”、“0A”,表示正常(注意:0B对应返回值010,0B对应返回值010,返回是16进制显示的嘛,设置的时候是10进制设置的)。

    标签: ASR M08-B

    上传时间: 2022-07-06

    上传用户:aben

  • 带通滤波器设计计算

    摘 要:用一种新的思路和方法,先计算低通、再计算高通滤波器的有关参数,然后组合成带通滤波器.关键词:滤波器;参数;新思路中图分类号: TN713. 5  文献识别码:B  文章编号:1008 - 1666 (1999) 04 - 0089 - 03A New Consideration of the Band Filter’s CalculationGuo Wencheng( S hao Yang B usiness and Technology school , S haoyang , Hunan ,422000 )Abstract :This essay deals with a new method of calculating the band filters - first calculatingthe relevant parameters of low - pass filters ,then calculating the ones of high - pass filters.Key words :filter ; parameters ;new considercation八十年代后,信息产业得到了迅猛发展. 带通滤波器在微波通信、广播电视和精密仪器设备中得到了广泛应用. 带通滤波器性能的优劣,对提高接收机信噪比,防止邻近信道干扰,提高设备的技术指标,有着十分重要的意义.我在长期的教学实践中,用切比雪夫型方法设计、计算出宽带滤波器集中参数元件的数据. 该滤波器可运用在检测微波频率的仪器和其他设备中. 再将其思路和计算方法介绍给大家,供参考.

    标签: 带通滤波器设计 计算

    上传时间: 2014-12-28

    上传用户:Yukiseop

  • acm HDOJ 1051WoodenSticks Description: There is a pile of n wooden sticks. The length and weight o

    acm HDOJ 1051WoodenSticks Description: There is a pile of n wooden sticks. The length and weight of each stick are known in advance. The sticks are to be processed by a woodworking machine in one by one fashion. It needs some time, called setup time, for the machine to prepare processing a stick. The setup times are associated with cleaning operations and changing tools and shapes in the machine. The setup times of the woodworking machine are given as follows: (a) The setup time for the first wooden stick is 1 minute. (b) Right after processing a stick of length l and weight w , the machine will need no setup time for a stick of length l and weight w if l<=l and w<=w . Otherwise, it will need 1 minute for setup.

    标签: WoodenSticks Description length wooden

    上传时间: 2014-03-08

    上传用户:netwolf

  • This document contains a general overview in the first few sections as well as a more detailed refer

    This document contains a general overview in the first few sections as well as a more detailed reference in later sections for SVMpython. If you re already familiar with SVMpython, it s possible to get a pretty good idea of how to use the package merely by browsing through svmstruct.py and multiclass.py. This document provides a more in depth view of how to use the package. Note that this is not a conversion of SVMstruct to Python. It is merely an embedding of Python in existing C code. All code other than the user implemented API functions is still in C, including optimization.

    标签: document contains detailed overview

    上传时间: 2013-12-14

    上传用户:希酱大魔王

  • 本程序要求用户在控制台里输入非终极符

    本程序要求用户在控制台里输入非终极符,终结符与产生式,然后对用户输入的文法进行分析,得出first集 与follow 集,并打印出预测分析表用户决定是否继续进行句型分析,如继续则给出符号分析栈的实现,从而判断刚输入的句子是否为符合该文法的句子。 该程序遵循LL(1) 文法FIRST(A)的构造:是A的所有可能推导的开头终结符或可能的ε FOLLOW(A)是所有句型中出现在紧接A之后的非终结符或“#” 预测分析程序 构造LL(1)分析表 ⅰ,构造文法中所有元素的FIRST和FOLLOW集合 ⅱ,对文法G的每个产生式A->α执行第三步和第四步 ⅲ,对每个终结符a∈FIRST(α),把A->α加至M[A,a] ⅳ,若ε∈FIRST(α),则对任何b∈FOLLOW(A)把A->α加至M[A,b]中 ⅴ,把所有无定义的M[A,a]标上“出错标志”

    标签: 程序 用户 控制台 输入

    上传时间: 2013-12-27

    上传用户:jackgao

  • The task of clustering Web sessions is to group Web sessions based on similarity and consists of max

    The task of clustering Web sessions is to group Web sessions based on similarity and consists of maximizing the intra- group similarity while minimizing the inter-group similarity. The first and foremost question needed to be considered in clustering W b sessions is how to measure the similarity between Web sessions.However.there are many shortcomings in traditiona1 measurements.This paper introduces a new method for measuring similarities between Web pages that takes into account not only the URL but also the viewing time of the visited web page.Yhen we give a new method to measure the similarity of Web sessions using sequence alignment and the similarity of W eb page access in detail Experiments have proved that our method is valid and e币cient.

    标签: sessions clustering similarity Web

    上传时间: 2014-01-11

    上传用户:songrui