本文檔介紹了如何使用各種內(nèi)嵌工具，函數(shù)和其他一些小技巧來加強(qiáng)使用matlab的速度和效率，是廣大愛好者必讀的文檔。具體內(nèi)容請(qǐng)參閱文檔。
Learn how to use the Profiler tool, vectorized functions, and other tricks to writing efficient MATLAB code. This article includes how to convert any array into a column vector, bounding a value without if statements, and repeating/tiling a vector without repmat.
Contents:
* The Profiler
* Array Preallocation
* JIT Acceleration
* Vectorization
* Inlining Simple Functions
* Referencing Operations
* Numerical Integration
* Signal Processing
* Miscellaneous Tricks
This is an implementation of double-array structure for representing trie,
as proposed by Junichi Aoe [1].
Trie is a kind of digital search tree, an efficient indexing method with
O(1) time complexity for searching. Comparably as efficient as hashing,
trie also provides flexibility on incremental matching and key spelling
manipulation. This makes it ideal for lexical analyzers, as well as spelling
dictionaries.
See the details of the implementation at [2]:
http://linux.thai.net/~thep/datrie/datrie.html
Historically, this was first implemented as C++ classes in a library called
midatrie [2], but later simplified and rewritten from scratch in C.
All of Java s Input/Output (I/O) facilities are based on streams, which provide simple ways to read and write data of different types. Java provides many different kinds of streams, each with its own application. The universe of streams is divided into four large categories: input streams and output streams, for reading and writing binary data and readers and writers, for reading and writing textual (character) data. You re almost certainly familiar with the basic kinds of streams--but did you know that there s a CipherInputStream for reading encrypted data? And a ZipOutputStream for automatically compressing data? Do you know how to use buffered streams effectively to make your I/O operations more efficient? Java I/O, 2nd Edition has been updated for Java 5.0 APIs and tells you all you ever need to know about streams--and probably more.
lfsThe LFS FTP archive has been moved to a new server which is reachable under the na
packages.linuxfromscratch.org. The reason for the move is that this new server sits on
lot more bandwidth to spare.
The SWF [pronounced 鈥渟wiff 鈥? file format delivers vector graphics, text, video, and sound
over the Internet and is supported by Adobe廬 Flash廬 Player software. The SWF file format is
designed to be an efficient delivery format, not a format for exchanging graphics between
graphics editors.
This book manage to show you how you can methodically apply different techniques to your
own algorithms to make them more efficient. While this book mostly highlights general techniques,
some well-known algorithms are also looked at in depth.
This paper shows the development of a 1024-point
radix-4 FFT VHDL core for applications in hardware signal processing, targeting low-cost FPGA technologies. The developed core is targeted into a Xilinx廬 Spartan鈩?3 XC3S200 FPGA with the inclusion of a VGA display interface and an external 16-bit data acquisition system for performance evaluation purposes. Several tests were performed in order to verify FFT core functionality, besides the time performance analysis highlights the core advantages over commercially available DSPs and Pentium-based PCs. The core is compared with similar third party IP cores targeting resourceful FPGA technologies. The novelty of this work is to provide a lowcost, resource efficient core for spectrum analysis
applications.
The main MIPS processor of SMP8630 comes with a JTAG interface, allowing:
access to caches and data bus (DRAM) with a bandwidth of about 200kbit/s
examining the processor state whatever the execution mode (monice)
connecting to monice using mdi-server and using a gdb client on the processor to step and break
accurately whatever the execution mode
running semi-hosted applications
fl ash write tool
memory testing (MT command)
real-time traces: has not been built in CPU (Config3_TL=0) and only supported by MajicPLUS probes
(maybe built into emulator?)
Fortran has always been the principal language used in the fields of scientific,
numerical, and engineering programming, and a series of revisions to the standard
defining successive versions of the language has progressively enhanced its power
and kept it competitive with several generations of rivals.
Beginning in 1978, the technical committee responsible for the development
of Fortran standards, X3J3 (now called J3), laboured to produce a new, much-
needed modern version of the language, Fortran 90. Its purpose is to "promote
portability, reliability, maintainability, and efficient execution... on a variety of
computing systems". The standard was published in 1991, and work began in
1993 on a minor revision, known informally as Fortran 95. Now this revised
