#include "iostream" using namespace std; class Matrix { private: double** A; //矩陣A double *b; //向量b public: int size; Matrix(int ); ~Matrix(); friend double* Dooli(Matrix& ); void Input(); void Disp(); }; Matrix::Matrix(int x) { size=x; //為向量b分配空間并初始化為0 b=new double [x]; for(int j=0;j<x;j++) b[j]=0; //為向量A分配空間并初始化為0 A=new double* [x]; for(int i=0;i<x;i++) A[i]=new double [x]; for(int m=0;m<x;m++) for(int n=0;n<x;n++) A[m][n]=0; } Matrix::~Matrix() { cout<<"正在析構(gòu)中~~~~"<<endl; delete b; for(int i=0;i<size;i++) delete A[i]; delete A; } void Matrix::Disp() { for(int i=0;i<size;i++) { for(int j=0;j<size;j++) cout<<A[i][j]<<" "; cout<<endl; } } void Matrix::Input() { cout<<"請(qǐng)輸入A:"<<endl; for(int i=0;i<size;i++) for(int j=0;j<size;j++){ cout<<"第"<<i+1<<"行"<<"第"<<j+1<<"列:"<<endl; cin>>A[i][j]; } cout<<"請(qǐng)輸入b:"<<endl; for(int j=0;j<size;j++){ cout<<"第"<<j+1<<"個(gè):"<<endl; cin>>b[j]; } } double* Dooli(Matrix& A) { double *Xn=new double [A.size]; Matrix L(A.size),U(A.size); //分別求得U，L的第一行與第一列 for(int i=0;i<A.size;i++) U.A[0][i]=A.A[0][i]; for(int j=1;j<A.size;j++) L.A[j][0]=A.A[j][0]/U.A[0][0]; //分別求得U，L的第r行，第r列 double temp1=0,temp2=0; for(int r=1;r<A.size;r++){ //U for(int i=r;i<A.size;i++){ for(int k=0;k<r-1;k++) temp1=temp1+L.A[r][k]*U.A[k][i]; U.A[r][i]=A.A[r][i]-temp1; } //L for(int i=r+1;i<A.size;i++){ for(int k=0;k<r-1;k++) temp2=temp2+L.A[i][k]*U.A[k][r]; L.A[i][r]=(A.A[i][r]-temp2)/U.A[r][r]; } } cout<<"計(jì)算U得:"<<endl; U.Disp(); cout<<"計(jì)算L的:"<<endl; L.Disp(); double *Y=new double [A.size]; Y[0]=A.b[0]; for(int i=1;i<A.size;i++ ){ double temp3=0; for(int k=0;k<i-1;k++) temp3=temp3+L.A[i][k]*Y[k]; Y[i]=A.b[i]-temp3; } Xn[A.size-1]=Y[A.size-1]/U.A[A.size-1][A.size-1]; for(int i=A.size-1;i>=0;i--){ double temp4=0; for(int k=i+1;k<A.size;k++) temp4=temp4+U.A[i][k]*Xn[k]; Xn[i]=(Y[i]-temp4)/U.A[i][i]; } return Xn; } int main() { Matrix B(4); B.Input(); double *X; X=Dooli(B); cout<<"~~~~解得:"<<endl; for(int i=0;i<B.size;i++) cout<<"X["<<i<<"]:"<<X[i]<<" "; cout<<endl<<"呵呵呵呵呵"; return 0; }
標(biāo)簽： 道理特分解法
上傳時(shí)間： 2018-05-20
上傳用戶：Aa123456789
The insinuation of telecommunications into the daily fabric of our lives has been arguably the most important and surprising development of the last 25 years. Before this revolution, telephone service and its place in our lives had been largely stable for more than a generation. The growth was, so to speak, lateral, as the global reach of telecommunications extended and more people got telephone service. The distinction between oversea and domestic calls blurred with the advances in switching and transmission, undersea cable, and communication satellites. Traffic on the network remained overwhelmingly voice, largely in analog format with facsimile (Fax) beginning to make inroads.
標(biāo)簽： Telecommunications Modeling Analysis and of
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
Battery systems for energy storage are among the most relevant technologies of the 21 st century. They – in particular modern lithium-ion batteries (LIB) – are enablers for the market success of electric vehicles (EV) as well as for stationary energy storage solutions for balancing fluctuations in electricity grids resulting from the integrationofrenewableenergysourceswithvolatilesupply 1 .BothEVandstationary storage solutions are important because they foster the transition from the usage of fossil energy carriers towards cleaner renewable energy sources. Furthermore, EV cause less local air pollution and noise emissions compared to conventional combustion engine vehicles resulting in better air quality especially in urban areas. Unfortunately, to this day, various technological and economic challenges impede a broad application of batteries for EV as well as for large scale energy storage and load leveling in electricity grids.
標(biāo)簽： Multiscale Simulation Approach
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
AR0231AT7C00XUEA0-DRBR（RGB濾光）安森美半導(dǎo)體推出采用突破性減少LED閃爍 (LFM)技術(shù)的新的230萬像素CMOS圖像傳感器樣品AR0231AT，為汽車先進(jìn)駕駛輔助系統(tǒng)(ADAS)應(yīng)用確立了一個(gè)新基準(zhǔn)。新器件能捕獲1080p高動(dòng)態(tài)范圍(HDR)視頻，還具備支持汽車安全完整性等級(jí)B(ASIL B)的特性。LFM技術(shù)(專利申請(qǐng)中)消除交通信號(hào)燈和汽車LED照明的高頻LED閃爍，令交通信號(hào)閱讀算法能于所有光照條件下工作。AR0231AT具有1/2.7英寸(6.82 mm)光學(xué)格式和1928(水平) x 1208(垂直)有源像素陣列。它采用最新的3.0微米背照式(BSI)像素及安森美半導(dǎo)體的DR-Pix?技術(shù)，提供雙轉(zhuǎn)換增益以在所有光照條件下提升性能。它以線性、HDR或LFM模式捕獲圖像，并提供模式間的幀到幀情境切換。 AR0231AT提供達(dá)4重曝光的HDR，以出色的噪聲性能捕獲超過120dB的動(dòng)態(tài)范圍。AR0231AT能同步支持多個(gè)攝相機(jī)，以易于在汽車應(yīng)用中實(shí)現(xiàn)多個(gè)傳感器節(jié)點(diǎn)，和通過一個(gè)簡(jiǎn)單的雙線串行接口實(shí)現(xiàn)用戶可編程性。它還有多個(gè)數(shù)據(jù)接口，包括MIPI(移動(dòng)產(chǎn)業(yè)處理器接口)、并行和HiSPi(高速串行像素接口)。其它關(guān)鍵特性還包括可選自動(dòng)化或用戶控制的黑電平控制，支持?jǐn)U頻時(shí)鐘輸入和提供多色濾波陣列選擇。封裝和現(xiàn)狀：AR0231AT采用11 mm x 10 mm iBGA-121封裝，現(xiàn)提供工程樣品。工作溫度范圍為-40℃至105℃(環(huán)境溫度)，將完全通過AEC-Q100認(rèn)證。
標(biāo)簽： 圖像傳感器
上傳時(shí)間： 2022-06-27
上傳用戶：XuVshu
About: hamsterdb is a database engine written in ANSI C. It supports a B+Tree index structure, uses memory mapped I/O (if available), supports cursors, and can create in-memory databases. Release focus: Major feature enhancements Changes: This release comes with many changes and new features. It can manage multiple databases in one file. A new flag (HAM_LOCK_EXCLUSIVE) places an exclusive lock on the file. hamsterdb was ported to Windows CE, and the Solution file for Visual Studio 2005 now supports builds for x64. Several minor bugs were fixed, performance was improved, and small API changes occurred. Pre-built libraries for Windows (32-bit and 64-bit) are available for download. Author: cruppstahl
標(biāo)簽： C. hamsterdb structure database
上傳時(shí)間： 2013-12-11
上傳用戶：LouieWu
2004China Undergraduate Mathematical Contest in Modeling (CUMCM)是2004年全國(guó)數(shù)學(xué)建模大賽的題目（B題）。現(xiàn)將題目，建模過程及利用“多元線性回歸和人工神經(jīng)網(wǎng)絡(luò)”解題的源代碼上傳給大家一起分享。
標(biāo)簽： 2004 Undergraduate Mathematical Modeling
上傳時(shí)間： 2014-01-08
上傳用戶：youth25
Specification for conveying ITU-R System B Teletext in DVB bitstreams
標(biāo)簽： Specification bitstreams conveying Teletext
上傳時(shí)間： 2014-02-18
上傳用戶：mikesering
梯形公式計(jì)算面積近似值:In=Tn=h/2(f(a)+f(b)) 變長(zhǎng)梯形面積:T2n=Tn/2+h/2∑f(Xk+h/2) 辛普生面積:I2n=(4T2n-Tn)/3
上傳時(shí)間： 2016-01-06
上傳用戶：qw12
b tree code for index in the database design
標(biāo)簽： database design index tree
上傳時(shí)間： 2016-02-03
上傳用戶：z1191176801
I wrote this code early this year using ColdFire MCF5213 in codewarrior IDE. The LCD is STN B/W 320x240 dot matrix LCD. The code include 3 different fonts, and basic LCD driver. All original!
標(biāo)簽： this codewarrior ColdFire wrote
上傳時(shí)間： 2013-12-20
上傳用戶：皇族傳媒
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