private double PointToAngle(Point AOrigin, Point APoint) { if (APoint.X == AOrigin.X) if (APoint.Y > AOrigin.Y) return Math.PI * 0.5f else return Math.PI * 1.5f else if (APoint.Y == AOrigin.Y) if (APoint.X > AOrigin.X) return 0 else return Math.PI else {
標(biāo)簽： AOrigin APoint Point PointToAngle
上傳時間： 2013-12-18
上傳用戶：rocketrevenge
For solving the following problem: "There is No Free Lunch" Time Limit: 1 Second Memory Limit: 32768 KB One day, CYJJ found an interesting piece of commercial from newspaper: the Cyber-restaurant was offering a kind of "Lunch Special" which was said that one could "buy one get two for free". That is, if you buy one of the dishes on their menu, denoted by di with price pi , you may get the two neighboring dishes di-1 and di+1 for free! If you pick up d1, then you may get d2 and the last one dn for free, and if you choose the last one dn, you may get dn-1 and d1 for free. However, after investigation CYJJ realized that there was no free lunch at all. The price pi of the i-th dish was actually calculated by adding up twice the cost ci of the dish and half of the costs of the two "free" dishes. Now given all the prices on the menu, you are asked to help CYJJ find the cost of each of the dishes.
標(biāo)簽： Limit following solving problem
上傳時間： 2014-01-12
上傳用戶：362279997
it is a simulation about ML synchronization algorithm in OFDM systems,you can slao see a function picture in its output,that s useful for a beginner
標(biāo)簽： synchronization simulation algorithm function
上傳時間： 2013-12-17
上傳用戶：yulg
Euler函數(shù): m = p1^r1 * p2^r2 * …… * pn^rn ai >= 1 , 1 <= i <= n Euler函數(shù)： 定義：phi(m) 表示小于等于m并且與m互質(zhì)的正整數(shù)的個數(shù)。 phi(m) = p1^(r1-1)*(p1-1) * p2^(r2-1)*(p2-1) * …… * pn^(rn-1)*(pn-1) = m*(1 - 1/p1)*(1 - 1/p2)*……*(1 - 1/pn) = p1^(r1-1)*p2^(r2-1)* …… * pn^(rn-1)*phi(p1*p2*……*pn) 定理：若(a , m) = 1 則有 a^phi(m) = 1 (mod m) 即a^phi(m) - 1 整出m 在實際代碼中可以用類似素數(shù)篩法求出 for (i = 1 i < MAXN i++) phi[i] = i for (i = 2 i < MAXN i++) if (phi[i] == i) { for (j = i j < MAXN j += i) { phi[j] /= i phi[j] *= i - 1 } } 容斥原理：定義phi(p) 為比p小的與p互素的數(shù)的個數(shù) 設(shè)n的素因子有p1, p2, p3, … pk 包含p1, p2…的個數(shù)為n/p1, n/p2… 包含p1*p2, p2*p3…的個數(shù)為n/(p1*p2)… phi(n) = n - sigm_[i = 1](n/pi) + sigm_[i!=j](n/(pi*pj)) - …… +- n/(p1*p2……pk) = n*(1 - 1/p1)*(1 - 1/p2)*……*(1 - 1/pk)
標(biāo)簽： Euler lt phi 函數(shù)
上傳時間： 2014-01-10
上傳用戶：wkchong
計算全息close all clc clear A=zeros(64) A(15:20,20:40)=1 A(15:50,20:25)=1 A(45:50,20:40)=1 A(30:34,20:35)=1 ％ ppp=exp(rand(64)*pi*2*i) A=A.*ppp ％ Author s email: zjliu2001@163.com figure imshow(abs(A),[]) Fa=fft2(fftshift(A)) Fs=fftshift(Fa) Am=abs(Fs) ％ amplitude Ph=angle(Fs) ％ phase s=11 ％ 這表示邊長嗎？ cgh=zeros(64*s) th=max(max(abs(Fs)))
標(biāo)簽： 20 close clear zeros
上傳時間： 2014-10-13
上傳用戶：wweqas
// 入口參數(shù)： // l: l = 0, 傅立葉變換 l = 1, 逆傅立葉變換 // il: il = 0,不計算傅立葉變換或逆變換模和幅角；il = 1,計算模和幅角 // n: 輸入的點數(shù)，為偶數(shù)，一般為32，64，128，...,1024等 // k: 滿足n=2^k(k>0),實質(zhì)上k是n個采樣數(shù)據(jù)可以分解為偶次冪和奇次冪的次數(shù) // pr[]: l=0時，存放N點采樣數(shù)據(jù)的實部 // l=1時, 存放傅立葉變換的N個實部 // pi[]: l=0時，存放N點采樣數(shù)據(jù)的虛部 // l=1時, 存放傅立葉變換的N個虛部 // // 出口參數(shù)： // fr[]: l=0, 返回傅立葉變換的實部 // l=1, 返回逆傅立葉變換的實部 // fi[]: l=0, 返回傅立葉變換的虛部 // l=1, 返回逆傅立葉變換的虛部 // pr[]: il = 1,i = 0 時，返回傅立葉變換的模 // il = 1,i = 1 時，返回逆傅立葉變換的模 // pi[]: il = 1,i = 0 時，返回傅立葉變換的輻角 // il = 1,i = 1 時，返回逆傅立葉變換的輻角
上傳時間： 2017-01-03
上傳用戶：ynsnjs
OFDM的發(fā)射端，包括pi/4DQPSK的調(diào)制，ifft，加幀頭以及組幀
上傳時間： 2013-12-26
上傳用戶：stvnash
The concept of the Altera Nios II embedded processor implementation inside Field Programmable Gate Array [FPGA] of the CCD camera for the “Pi of the Sky” experiment is presented. The digital board of the CCD camera, its most important components, current implementation of firmware [VHDL] inside the FPGA and the role of external 8051 microcontroller is briefly described. The main goal of the presented work is to get rid of the external microcontroller and to design new system with Nios II processor built inside FPGA chip. Constraints for implementing the design into the existing camera boards are discussed. New possibilities offered by a larger FPGA for next generation of cameras are considered.
標(biāo)簽： implementation Programmable processor embedded
上傳時間： 2014-01-02
上傳用戶：dyctj
本程序用于檢測音頻文件中是否具有DTMF信號，若有則將其檢出。 程序首先使用Goertzel算法求出以FRAMESIZE（默認(rèn)200）為大小的一幀數(shù)據(jù)在8個DTMF頻點上的能量。 對Goertzel算法的改進(jìn)，對于系數(shù)的計算不是采用2*cos[2*pi*k/N]，而是采用2*cos[2*pi*fn/fs],這樣能夠降低誤差。 確定了8個頻點的能量后運用一系列判決門限來確定有沒有DTMF信號，以及信號是什么。
上傳時間： 2017-03-15
上傳用戶：wyc199288
利用布豐投針的思想，用數(shù)值隨機(jī)算法估計計算PI的值。
標(biāo)簽：
上傳時間： 2017-03-23
上傳用戶：llandlu
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