在程序設計過程中，類似于解決其它復雜的智力問題，我們使用推測、直覺、技巧、靈感和經驗在內的各種技巧和技術，最經常使用的工具是抽象技術。一般地，在開始階段，因還未了解問題的全部細節和求解的方法，主要問題集中于對問題的求解方案的全局作出決策，設計出大概的求解步聚，這是非常抽象的算法。其中有許多細節還不明確，只是用結構化的控制結構將若干抽象的計算步聚有機地聯系起來。在抽象的計算步聚中，只是確定了計算的目標，而所指的操作對象和數據結構通常還是未確定的。以計算目標為線索，對抽象計算步聚作進一步的深入考慮，可能會引入數據結構和操作對象，并給也更詳細的計算過程的描述。其中也許依舊包含有某些抽象計算步聚，但與原來的計算步聚相比，在規模及難度上已有所降低。對新產生的抽象計算步聚作進一步的深入考慮和分解，如此循序漸近，計算步聚、操作對象和數據結構會越來越明確，抽象的東西會越來越少，直至有關細節都已確定后設計過程才算結束，隨后的工作是程序編碼。
上傳時間： 2016-01-10
上傳用戶：baiom
FIST可堆疊文件系統，linux文件系統修改相關的開源軟件，使得對linux文件系統功能的改進很簡單了 The FiST (File System Translator) system combines two methods to solve the above problems in a novel way: a set of stackable file system templates for each operating system, and a high-level language that can describe stackable file systems in a cross-platform portable fashion. Using FiST, stackable file systems need only be described once. FiST s code generation tool, fistgen, compiles a single file system description into loadable kernel modules for several operating systems (currently Solaris, Linux, and FreeBSD). The project demonstrates that with FiST, code size and development time are reduced significantly, while imposing a small performance overhead of only 1-2％. These benefits are achieved, as well as portability, without changing existing operating systems or file system.
上傳時間： 2014-01-10
上傳用戶：xsnjzljj
arm7上的操作系統 任務按優先級調度，如果處于就緒態且優先級最高的任務有兩個或更多，則按時間片輪循調度
上傳時間： 2013-12-29
上傳用戶：cx111111
Visual Basic Shell Programming ventures where none have gone before by showing how to develop shell extensions that more closely integrate an application with the Windows shell, while at the same time providing an advanced tutorial-style treatment of COM programming with Visual Basic. Each major type of shell extension gets attention, including customized context menu handlers, per instance icons, and customized property sheets.
標簽： Programming ventures develop showing
上傳時間： 2016-02-01
上傳用戶：tb_6877751
This fourth edition of the definitive reference to JavaScript, a scripting language that can be embedded directly in web pages, covers the latest version of the language, JavaScript 1.5, as supported by Netscape 6 and Internet Explorer 6. The book also provides complete coverage of the W3C DOM standard (Level 1 and Level 2), while retaining material on the legacy Level 0 DOM for backward compatibility
標簽： JavaScript definitive reference scripting
上傳時間： 2013-12-25
上傳用戶：xuanchangri
Ideal for large low power (nanoWatt) and connectivity applications that benefit from the availability of four serial ports: double synchronous serial ports (I² C™ and SPI™ ) and double asynchronous (LIN capable) serial ports. Large amounts of RAM memory for buffering and FLASH program memory make it ideal for instrumentation panels, TCP/IP enabled embedded applications as well as metering and industrial control and monitoring applications. While operating up to 40 MHz, it is also backward software and hardware compatible with the PIC18F8720.
標簽： connectivity applications availabilit nanoWatt
上傳時間： 2016-02-04
上傳用戶：CHINA526
AutoBoot is a generic boot loader that automatically locates, loads, and executes object files from multiple types of media. AutoBoot provides a simple, fast, and functional means of loading an OS image while maintaining a small Flash memory footprint. This binary release contains a stand-alone version of AutoBoot for the DbAu1200 development board, designed to replace the YAMON boot loader.
標簽： automatically AutoBoot executes generic
上傳時間： 2014-01-14
上傳用戶：海陸空653
一個能夠分析三種整數、標識符、主要運算符和主要關鍵字的詞法分析程序。 ㈠、基本要求： 標識符 <字母>(<字母>|<數字字符>)* 十進制整數 0 | (1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)* 八進制整數 0(1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* 十六進制整數 0x(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)* 運算符和分隔符 + - * / > < = ( ) ； 關鍵字 if then else while do ㈡、附加要求： 標識符 <字母>(<字母>|<數字字符>)*(ε|_|.)(<字母>|<數字字符>)* 十進制整數 (0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*(ε|.)(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)* 八進制整數 0(1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* (ε|.)(0|1|2|3|4|5|6|7)(0|1|2|3|4|5|6|7)* 十六進制整數 0x(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)* (ε|.) (0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)(0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f)*
上傳時間： 2016-03-03
上傳用戶：zhengjian
【下載說明】 這里提供給大家的是《Embedded Linux: Hardware, Software, and Interfacing》（嵌入式 Linux---硬件、軟件與接口）一書的英文原版CHM格式下載。 【作者簡介】 Craig Hollabaugh has been fascinated by electronics since he bought an AM radio in elementary school. He was first exposed to Unix during a cross-country talk session in 1985. Later, he administered networked Sun and DEC workstations while pursuing a doctoral degree in electrical engineering at Georgia Institute of Technology. 【內容提要】 本書通過一個冬季旅游勝地自動化管理項目實例，從軟件、硬件和接口的觀點介紹嵌入式Linux。引入項目需求后，作者講述了開發環境的建立，接著用一系列軟硬件接口實例展示了如何使用異步串行通信、PC并口、USB、內存I/O、同步串行通信以及中斷，等等。最后介紹了將前面所有的工作有機地組織在一起的系統集成過程。本書以實際應用為導向，書中整個項目的實施過程和軟硬件接口實例都具實踐指導意義。
標簽： Linux Interfacing Embedded Hardware
上傳時間： 2014-01-22
上傳用戶：shus521
This document is intended to serve as an introduction to Wavelet processing through a set of Matlab experiments. These experiments will gives an overview of three fundamental tasks in signal and image processing : signal, denoising and compression. These scripts are selfs contents (needed additional Matlab functions can be downloaded while reading the lectures). Each one of these five lectures should take between 1h and 2h in order to tests the various features of the scripts. One should copy/paste the provided code into a file names e.g. tp1.m, and launch the script directly from Matlab comand line > tp1 . Some of the scripts contains "holes" that you should try to fill on your own. I also provide the complete correction of these lectures as a set of Matlab scripts, but you should try as much as possible to avoid using them.
標簽： introduction processing document intended
上傳時間： 2016-03-22
上傳用戶：qlpqlq
