一﹑指标要求:. A: f5 b G A( d8 n (1)设计一个4位十进制的频率计其测量范围1Hz~9.999KHz;6 N3 G8 k( U- @ n* A (2)记数过程结束后,保存并显示结果;
上传时间: 2014-01-07
上传用户:妄想演绎师
针对目前使用的RS232接口数字化B超键盘存在PC主机启动时不能设置BIOS,提出一种PS2键盘的设计方法。基于W78E052D单片机,采用8通道串行A/D转换器设计了8个TGC电位器信息采集电路,电位器位置信息以键盘扫描码序列形式发送,正交编码器信号通过XC9536XL转换为单片机可接收的中断信号,软件接收到中断信息后等效处理成按键。结果表明,在满足开机可设置BIOS同时,又可实现超声特有功能,不需要专门设计驱动程序,接口简单,成本低。 Abstract: Aiming at the problem of the digital ultrasonic diagnostic imaging system keyboard with RS232 interface currently used couldn?蒺t set the BIOS when the PC boot, this paper proposed a design method of PS2 keyboards. Based on W78E052D microcontroller,designed eight TGC potentiometers information acquisition circuit with 8-channel serial A/D converter, potentiometer position information sent out with keyboard scan code sequentially.The control circuit based on XC9536 CPLD is used for converting the mechanical actions of the encoders into the signals that can be identified by the MCU, software received interrupt information and equivalently treatmented as key. The results show that the BIOS can be set to meet the boot, ultrasound specific functionality can be achieved at the same time, it does not require specially designed driver,the interface is simple and low cost.
上传时间: 2013-10-10
上传用户:asdfasdfd
二: 普通计算器的设计说明: 1 普通计算器的主要功能(普通计算与逆波兰计算): 1.1主要功能: 包括 a普通加减乘除运算及带括号的运算 b各类三角与反三角运算(可实现角度与弧度的切换) c逻辑运算, d阶乘与分解质因数等 e各种复杂物理常数的记忆功能 f对运算过程的中间变量及上一次运算结果的储存. G 定积分计算器(只要输入表达式以及上下限就能将积分结果输出) H 可编程计算器(只要输入带变量的表达式后,再输入相应的变量的值就能得到相应的结果) I 二进制及八进制的计算器 j十六进制转化为十进制的功能。 *k (附带各种进制间的转化器)。 L帮助与阶乘等附属功能
上传时间: 2013-11-26
上传用户:yzy6007
98年全国大学生数学建模竞赛B题“水灾巡视问题”,是一个推销员问题,本题有53个点,所有可能性大约为exp(53),目前没有好方法求出精确解,既然求不出精确解,我们使用模拟退火法求出一个较优解,将所有结点编号为1到53,1到53的排列就是系统的结构,结构的变化规则是:从1到53的排列中随机选取一个子排列,将其反转或将其移至另一处,能量E自然是路径总长度。具体算法描述如下:步1: 设定初始温度T,给定一个初始的巡视路线。步2 :步3 --8循环K次步3:步 4--7循环M次步4:随机选择路线的一段步5:随机确定将选定的路线反转或移动,即两种调整方式:反转、移动。步6:计算代价D,即调整前后的总路程的长度之差步7:按照如下规则确定是否做调整:如果D0,则按照EXP(-D/T)的概率进行调整步8:T*0.9-->T,降温
上传时间: 2015-03-14
上传用户:himbly
This project attempts to implement a Database using B+Tree. The project has developed a DATABASE SYSTEM with lesser memory consumption. Its API includes simple SQL Statements and the output is displayed on the screen. Certain applications for which several features of existing databases like concurrency control, transaction management, security features are not enabled. B+Trees can be used as an index for factor access to the data. Help facility is provided to know the syntax of SQL Statements.
标签: project implement developed Database
上传时间: 2013-12-25
上传用户:semi1981
If we have two individually sorted vectors "a" and "b" but they are not sorted with respect to each other and we want to merge them into vector "c" such that "c" is also a sorted vector. Then c=mergesorted(a,b) can be used.
标签: sorted individually respect vectors
上传时间: 2015-09-23
上传用户:comua
C# BigInteger class. BigInteger.cs is a csharp program. It is the BIgInteger class. It has methods: abs() , FermatLittleTest(int confidence) ,gcd(BigInteger bi) , genCoPrime(int bits, Random rand) , genPseudoPrime(int bits, int confidence, Random rand) , genRandomBits(int bits, Random rand) , isProbablePrime(int confidence) , isProbablePrime() , Jacobi(BigInteger a, BigInteger b) , LucasSequence(BigInteger P, BigInteger Q, BigInteger k, BigInteger n) ,max(BigInteger bi) , min(BigInteger bi) , modInverse(BigInteger modulus) , RabinMillerTest(int confidence) ,
标签: BigInteger class BIgInteger program
上传时间: 2013-12-23
上传用户:ynzfm
设B是一个n×n棋盘,n=2k,(k=1,2,3,…)。用分治法设计一个算法,使得:用若干个L型条块可以覆盖住B的除一个特殊方格外的所有方格。其中,一个L型条块可以覆盖3个方格。且任意两个L型条块不能重叠覆盖棋盘
标签:
上传时间: 2013-12-16
上传用户:脚趾头
design LP,HP,B S digital Butterworth and Chebyshev filter. All array has been specified internally,so user only need to input f1,f2,f3,f4,fs(in hz), alpha1,alpha2(in db) and iband (to specify the type of to design). This program output hk(z)=bk(z)/ak(z),k=1,2,..., ksection and the freq.
标签: Butterworth internally Chebyshev specified
上传时间: 2015-11-08
上传用户:253189838
问题描述 序列Z=<B,C,D,B>是序列X=<A,B,C,B,D,A,B>的子序列,相应的递增下标序列为<2,3,5,7>。 一般地,给定一个序列X=<x1,x2,…,xm>,则另一个序列Z=<z1,z2,…,zk>是X的子序列,是指存在一个严格递增的下标序列〈i1,i2,…,ik〉使得对于所有j=1,2,…,k使Z中第j个元素zj与X中第ij个元素相同。 给定2个序列X和Y,当另一序列Z既是X的子序列又是Y的子序列时,称Z是序列X和Y的公共子序列。 你的任务是:给定2个序列X、Y,求X和Y的最长公共子序列Z。
上传时间: 2014-01-25
上传用户:netwolf