P3.20. Consider an analog signal xa (t) = sin (2πt), 0 ≤t≤ 1. It is sampled at Ts = 0.01, 0.05, and 0.1 sec intervals to obtain x(n). b) Reconstruct the analog signal ya (t) from the samples x(n) using the sinc interpolation (use ∆ t = 0.001) and determine the frequency in ya (t) from your plot. (Ignore the end effects.) C) Reconstruct the analog signal ya (t) from the samples x (n) using the cubic spline interpolation and determine the frequency in ya (t) from your plot. (Ignore the end effects.)
標(biāo)簽: Consider sampled analog signal
上傳時(shí)間: 2017-07-12
上傳用戶(hù):咔樂(lè)塢
有關(guān)于T函數(shù)與B函數(shù)的一些總結(jié),可以作為課件使用。
標(biāo)簽: 數(shù)學(xué)分析 函數(shù) 講解
上傳時(shí)間: 2015-11-10
上傳用戶(hù):wangtianhe
二: 普通計(jì)算器的設(shè)計(jì)說(shuō)明: 1 普通計(jì)算器的主要功能(普通計(jì)算與逆波蘭計(jì)算): 1.1主要功能: 包括 a普通加減乘除運(yùn)算及帶括號(hào)的運(yùn)算 b各類(lèi)三角與反三角運(yùn)算(可實(shí)現(xiàn)角度與弧度的切換) c邏輯運(yùn)算, d階乘與分解質(zhì)因數(shù)等 e各種復(fù)雜物理常數(shù)的記憶功能 f對(duì)運(yùn)算過(guò)程的中間變量及上一次運(yùn)算結(jié)果的儲(chǔ)存. G 定積分計(jì)算器(只要輸入表達(dá)式以及上下限就能將積分結(jié)果輸出) H 可編程計(jì)算器(只要輸入帶變量的表達(dá)式后,再輸入相應(yīng)的變量的值就能得到相應(yīng)的結(jié)果) I 二進(jìn)制及八進(jìn)制的計(jì)算器 j十六進(jìn)制轉(zhuǎn)化為十進(jìn)制的功能。 *k (附帶各種進(jìn)制間的轉(zhuǎn)化器)。 L幫助與階乘等附屬功能
標(biāo)簽: 運(yùn)算 1.1 計(jì)算器 計(jì)算
上傳時(shí)間: 2013-11-26
上傳用戶(hù):yzy6007
98年全國(guó)大學(xué)生數(shù)學(xué)建模競(jìng)賽B題“水災(zāi)巡視問(wèn)題”,是一個(gè)推銷(xiāo)員問(wèn)題,本題有53個(gè)點(diǎn),所有可能性大約為exp(53),目前沒(méi)有好方法求出精確解,既然求不出精確解,我們使用模擬退火法求出一個(gè)較優(yōu)解,將所有結(jié)點(diǎn)編號(hào)為1到53,1到53的排列就是系統(tǒng)的結(jié)構(gòu),結(jié)構(gòu)的變化規(guī)則是:從1到53的排列中隨機(jī)選取一個(gè)子排列,將其反轉(zhuǎn)或?qū)⑵湟浦亮硪惶?能量E自然是路徑總長(zhǎng)度。具體算法描述如下:步1: 設(shè)定初始溫度T,給定一個(gè)初始的巡視路線。步2 :步3 --8循環(huán)K次步3:步 4--7循環(huán)M次步4:隨機(jī)選擇路線的一段步5:隨機(jī)確定將選定的路線反轉(zhuǎn)或移動(dòng),即兩種調(diào)整方式:反轉(zhuǎn)、移動(dòng)。步6:計(jì)算代價(jià)D,即調(diào)整前后的總路程的長(zhǎng)度之差步7:按照如下規(guī)則確定是否做調(diào)整:如果D0,則按照EXP(-D/T)的概率進(jìn)行調(diào)整步8:T*0.9-->T,降溫
標(biāo)簽: 大學(xué)生 數(shù)學(xué)建模 巡視 競(jìng)賽
上傳時(shí)間: 2015-03-14
上傳用戶(hù):himbly
The Kannel Open Source WAP and SMS gateway works as both an SMS gateway, for implementing keyword based services via GSM text messages, and a WAP gateway, via UDP. The SMS part is fairly mature, the WAP part is early in its development. In this release, the GET request for WML pages and WMLScript files via HTTP works, including compilation for WML and WMLScript to binary forms. Only the data call bearer (UDP) is supported, not SMS.
標(biāo)簽: gateway implementing SMS keyword
上傳時(shí)間: 2014-01-11
上傳用戶(hù):2525775
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.
標(biāo)簽: project implement developed Database
上傳時(shí)間: 2013-12-25
上傳用戶(hù):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.
標(biāo)簽: sorted individually respect vectors
上傳時(shí)間: 2015-09-23
上傳用戶(hù):comua
考察例1 4 - 8中的1 4個(gè)點(diǎn)。A中的最近點(diǎn)對(duì)為(b,h),其距離約為0 . 3 1 6。B中最近點(diǎn)對(duì)為 (f, j),其距離為0 . 3,因此= 0 . 3。當(dāng)考察 是否存在第三類(lèi)點(diǎn)時(shí),除d, g, i, l, m 以外 的點(diǎn)均被淘汰,因?yàn)樗鼈兙喾指罹€x= 1的 距離≥ 。RA ={d, i, m},RB= {g, l},由 于d 和m 的比較區(qū)中沒(méi)有點(diǎn),只需考察i 即可。i 的比較區(qū)中僅含點(diǎn)l。計(jì)算i 和l 的距離,發(fā)現(xiàn)它小于,因此(i, l) 是最近
標(biāo)簽:
上傳時(shí)間: 2013-12-03
上傳用戶(hù):66666
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.
標(biāo)簽: WoodenSticks Description length wooden
上傳時(shí)間: 2014-03-08
上傳用戶(hù):netwolf
代入法的啟發(fā)示搜索 我的代碼實(shí)現(xiàn)是:按照自然語(yǔ)言各字母出現(xiàn)頻率的大小從高到低(已經(jīng)有人作國(guó)統(tǒng)計(jì)分析了)先生成一張字母出現(xiàn)頻率統(tǒng)計(jì)表(A)--------(e),(t,a,o,i,n,s,h,r),(d,l),(c,u,m,w,f,g,y,p,b),(v,k,j,x,q,z) ,再對(duì)密文字母計(jì)算頻率,并按頻率從高到低生成一張輸入密文字母的統(tǒng)計(jì)表(B),通過(guò)兩張表的對(duì)應(yīng)關(guān)系,不斷用A中的字母去替換B中的字母,搜索不成功時(shí)就回退,在這里回朔是一個(gè)關(guān)鍵。
上傳時(shí)間: 2015-10-24
上傳用戶(hù):wanqunsheng
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