sfrmat is a Matlab function that provides a spatial frequency response* (SFR) from a digital image file containing a slanted-edge feature. The specific edge-gradient algorithm follows the intent of the standard ISO 12233, developed by Technical Committee ISI/TC 42, for resolution measurements for electronic still pictorial cameras.
标签： frequency function provides response
上传时间： 2014-01-20
上传用户：qunquan
设定a为N(0,1)的500个随机数和i长为500，以n=8、16、64.分别调用u_pcm.m ，从中计算量化误差f=a-a_quan并绘图，分别输出各样值的量化误差图形。
上传时间： 2014-01-17
上传用户：偷心的海盗
Multirate filters provide a practical approach to designing and implementing finite response (FIR) filters with narrow spectral constraints. By changing the input data rate at one or more intermediate points the filter lengths and computational rates can be greatly reduced when compared to a standard single-rate filter implementation.
标签： implementing Multirate designing practical
上传时间： 2016-07-01
上传用户：dengzb84
This is a simple GPS tracer developed for Window Mobile 2005/2003 on Compact Framework 2.0 SDK. So first of all, you need VisualStudio 2005 and Windows Mobile CE 5 SDK. You can develop it on emulator devices or on a real device. As you can see in that photo, I developed that application on a read device: the great Asus MyPal 636N.
标签： Framework developed Compact Mobile
上传时间： 2016-08-11
上传用户：gxf2016
The literature of cryptography has a curious history. Secrecy, of course, has always played a central role, but until the First World War, important developments appeared in print in a more or less timely fashion and the field moved forward in much the same way as other specialized disciplines. As late as 1918, one of the most influential cryptanalytic papers of the twentieth century, William F. Friedman’s monograph The Index of Coincidence and Its Applications in Cryptography, appeared as a research report of the private Riverbank Laboratories [577]. And this, despite the fact that the work had been done as part of the war effort. In the same year Edward H. Hebern of Oakland, California filed the first patent for a rotor machine [710], the device destined to be a mainstay of military cryptography for nearly 50 years.
标签： cryptography literature has Secrecy
上传时间： 2016-12-08
上传用户：fxf126@126.com
made by: kangkai data:2008.11.23 this one is used to test arm7 str71x. use a led to test GPIO. a---------P0.0 b---------P0.1 c---------P0.2 d---------P0.3 e---------P0.4 f---------P0.5 g---------P0.6 just run it and you will see the led to show 0-9 all the time.
上传时间： 2016-12-16
上传用户：moerwang
【欧拉算法】 微分方程的本质特征是方程中含有导数项,数值解法的第一步就是...欧拉(Euler)算法是数值求解中最基本、最简单的方法,但其求解精度较低,一般不在...对于常微分方程: dy/dx=f(x,y),x∈[a,b] y(a)=y0 可以将区
上传时间： 2014-01-09
上传用户：www240697738
编写具有如下函数原型的递归与非递归两种函数f，负责判断数组a的前n个元素是否从大到小完全有序了，是则返回true，否则返回false。并编制主函数对它们进行调用，以验证其正确性。 bool f(int a[], int n) 提示： （1）非递归函数中只需逐对地判断各a[i]与a[i+1]是否都已从大到小有序排列（i = 0，1，…，n-2）。 （2）递归函数中将问题分解处理为：若n=1（即只有1个元素时）则返回true而递归出口；n>1时，若最后一对元素不顺序则返回false，否则进行递归调用（传去实参a与 n-1，去判断前n-1个元素的顺序性），并返回递归调用的结果（与前n-1个元素的是否顺序性相同）。
上传时间： 2017-01-02
上传用户：清风冷雨
A novel met hod t o p artially compensate sigma2delta shap ed noise is p rop osed. By injecting t he comp en2 sation cur rent int o t he p assive loop f ilte r during t he delay time of t he p hase f requency detect or ( PFD) , a maximum reduction of t he p hase noise by about 16dB can be achieved. Comp a red t o ot he r compensation met hods , t he tech2 nique p rop osed he re is relatively simple and easy t o implement . Key building blocks f or realizing t he noise cancel2 lation , including t he delay va riable PFD and comp ensation cur rent source , a re sp ecially designed. Bot h t he behavior level and circuit level simulation results a re p resented.
标签： sigma2delta compensate injecting artially
上传时间： 2013-12-18
上传用户：qlpqlq
（一）基本任务：单频正弦波模拟信号的简单数字化。即对一个单频正弦波模拟信号进行抽样、均匀量化、PCM二进制自然编码。 1、主要步骤和要求： （1）单频正弦波模拟信号的抽样实现。要求输入信号的幅度A、频率F和相位P可变；要求仿真时间从0到2/F，抽样频率为Fs=20F；要求给出抽样信号samp的波形图。 （2）单频正弦波模拟信号均匀量化的实现。要求对抽样信号sampl归一化后再进行均匀量化；要求量化电平数D可变；要求输出信号为平顶正弦波；要求给出量化输出信号quant的波形图，并与抽样信号samp画在同一图形窗口中进行波形比较。 （3）单频正弦波模拟信号PCM二进制自然编码的实现。要求按量化序号给出PCM二进制自然编码；要求给出编码后的数字序列pcm。
上传时间： 2013-12-07
上传用户：无聊来刷下
