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SuperLU is a general purpose library for the direct solution of large, sparse, nonsymmetric systems of linear equations on high performance machines. The library is written in C and is callable from either C or Fortran. The library routines will perform an LU decomposition with partial pivoting and triangular system solves through forward and back substitution. The LU factorization routines can handle non-square matrices but the triangular solves are performed only for square matrices. The matrix columns may be preordered (before factorization) either through library or user supplied routines. This preordering for sparsity is completely separate from the factorization. Working precision iterative refinement subroutines are provided for improved backward stability. Routines are also provided to equilibrate the system, estimate the condition number, calculate the relative backward error, and estimate error bounds for the refined solutions.
標簽：
nonsymmetric
solution
SuperLU
general
上傳時間：
2017-02-20
上傳用戶：lepoke
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mkdosfs - Make DOS file system utilty.
I wrote this, partially to complement the dosfsck utility written by Werner
Almesberger (who graciously gave me some pointers when I asked for some
advice about writing this code), and also to avoid me having to boot DOS
just to create data partitions (I use Linux to back up DOS :-) ).
標簽：
complement
partially
mkdosfs
dosfsck
上傳時間：
2017-03-01
上傳用戶：gonuiln
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cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide.
the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972.
here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). because the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation.
you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.
標簽：
essentially
algorithm
describe
suitably
上傳時間：
2017-03-02
上傳用戶：litianchu
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simple ATM [Automatic Teller Machine] system the basic functions Login including write-offs, inquiries, deposits, withdrawals and alter the code. Simulation of ATM terminal users logged in, their account numbers and passwords through the ATM network to transmit to the server, ATM database server based on the information to confirm the account number and password is correct, the results back to the ATM terminal. If the correct account number and password, the ATM into the next terminal interface Otherwise prompt mistakes. Cancellation notice for the operation of the server ATM transactions concluded inquiries, deposits, withdrawals and alter the code operations are first sent an order to ATM servers, ATM by the database server implementation of the corresponding operation and operating res
標簽：
write-offs
Automatic
functions
including
上傳時間：
2014-01-20
上傳用戶：semi1981
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here is a C++ code for TCP server and client on linux mechine that listens on a specific port
and then replies back to the client
標簽：
and
specific
mechine
listens
上傳時間：
2017-04-04
上傳用戶：aa17807091
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I ll probably write up a short article next week outlining how the ActionScript works, so people can modify it, and work with it more easily in Flex.
You can download the component and source code here. There are some instructions in the FLA on how to use it. Note that this is not a compiled component, so it won t show up in the components panel. You will have to copy the component, and the source file into your project. If anyone really wants a compiled version, let me know and I can provide one.
As always, I d love to hear how people use it, and would appreciate it if you would post back to the comments if you make any significant modifications so that other people can benefit from them.
標簽：
ActionScript
outlining
probably
article
上傳時間：
2017-04-20
上傳用戶：c12228
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Face Recognition Library
========================
Advanced face recognition DLL using two functions : Train and Recognize. Uses neural net back propogation alogorithm with more AI tools added for imaging optimization. Library works great even for a low resolution web cam image and requires the user to align to a mirror frame on screen. Complete Source Code with Video capture and feature extraction kit for Registered Users.
Please register here for only $299 with Source Code :
http://www.research-lab.com/facerecognitionorder.htm
(c) www.research-lab.com
標簽：
Recognition
recognition
Advanced
Library
上傳時間：
2017-04-25
上傳用戶：784533221
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Playfair Cipher
1.not even the large number of keys in a monoalphabetic cipher provides security
2.one approach to improving security was to encrypt multiple letters
3.the Playfair Cipher is an example
4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair
Playfair Key Matrix
1.a 5X5 matrix of letters based on a keyword
2.fill in letters of keyword (sans duplicates)
3.fill rest of matrix with other letters
Encrypting and Decrypting
-plaintext is encrypted two letters at a time
1. if a pair is a repeated letter, insert filler like X’
2. if both letters fall in the same row, replace each with letter to right (wrapping back to start from end)
3. if both letters fall in the same column, replace each with the letter below it (again wrapping to top from
bottom)
4. otherwise each letter is replaced by the letter in the same row and in the column of the other letter of the pair
標簽：
monoalphabetic
Playfair
provides
security
上傳時間：
2017-05-25
上傳用戶：變形金剛
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人工神經網絡(Aartificial Neural Network，下簡稱ANN)是模擬生物神經元的結構而提出的一種信息處理方法。早在1943年，已由心理學家Warren S.Mcculloch和數學家Walth H.Pitts提出神經元數學模型，后被冷落了一段時間，80年代又迅猛興起［1］。ANN之所以受到人們的普遍關注，是由于它具有本質的非線形特征、并行處理能力、強魯棒性以及自組織自學習的能力。其中研究得最為成熟的是誤差的反傳模型算法(BP算法，Back Propagation)，它的網絡結構及算法直觀、簡單，在工業領域中應用較多。
標簽：
Aartificial
Network
Neural
人工神經網絡
上傳時間：
2014-01-03
上傳用戶：zhangzhenyu
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Emdros is a text database middleware-layer aimed at storage and
retrieval of "text plus information about that text." This
information could be linguistic analyses or other annotations. Emdros
provides an abstraction of text that makes it well suited to storing
/syntactic analyses/ of text, but other linguistic information is
supported as well. Emdros comes with a query-language, MQL, that
enables powerful queries. Emdros acts as a middleware-layer between a
client (not provided) and a database back-end. Currently, PostgreSQL,
MySQL, and SQLite (2 and 3) are supported, but other back-ends can
easily be added.
標簽：
text
middleware-layer
information
retrieval
上傳時間：
2014-01-02
上傳用戶：wfeel
