In a preemptive priority based RTOS, priority inversion problem is among the major sources of deadline violations. Priority inheritance protocol is one of the approaches to reduce priority inversion. Unfortunately, RTOS like uC/OS can’t support priority inheritance protocol since it does not allow kernel to have multiple tasks at the same priority. Although it has different ways to avoid priority inversion such as priority ceiling protocol, developers still have some difficulties in programming real time applications with it. In this paper, we redesign the uC/OS kernel to provide the ability to support round robin scheduling and implement priority inheritance semaphore on the modified kernel. As result, we port new kernel with priority inheritance semaphore to evaluation board, and evaluate the execution time of each of the kernel service as well as verify the operations of our implementation.
标签： priority preemptive inversion problem
上传时间： 2015-12-14
上传用户：气温达上千万的
Using the UnderC Tokenizer Class It s often necessary to parse complex text files, where standard i/o is too clumsy. C programmers fall back on strtok(), but this can be tricky to use properly. Besides, you are still responsible for keeping strtok() fed with new input, and I don t like the schlepp. Tokenizer is a text-parsing input stream, modelled after the (undocumented) VCL TParser class, and based on the UnderC tokenizing preprocessor front-end.
标签： Tokenizer necessary standard complex
上传时间： 2013-12-16
上传用户：whenfly
When I first studied Kalman filtering, I saw many advanced signal processing submissions here at the MATLAB Central File exchange, but I didn t see a heavily commented, basic Kalman filter present to allow someone new to Kalman filters to learn about creating them. So, a year later, I ve written a very simple, heavily commented discrete filter.
标签： submissions processing filtering advanced
上传时间： 2015-12-23
上传用户：变形金刚
IBM关于声音应用开发的白皮书.This white paper is intended for software developers who want to learn about the tools and techniques available to create new voice applications.
标签： developers intended software white
上传时间： 2014-01-14
上传用户：libenshu01
With User Mode Linux you can create virtual Linux machines within a Linux computer and use them to safely test and debug applications, network services, and even kernels. You can try out new distributions, experiment with buggy software, and even test security. Now, for the first time, the creator and maintainer of User Mode Linux shows how to put it to work hands-on. Jeff Dike covers everything from getting started through running enterprise-class User Mode Linux servers. You ll find authoritative advice on bootup, compilation, administration, specialized configurations, and much more.
标签： Linux computer machines virtual
上传时间： 2013-12-19
上传用户：xinzhch
vs.net技术内幕 The release of the Microsoft Visual Studio .NET (and Visual C++ .NET in particular) has underscored Microsoft’s increasing focus on Internet technologies, which are at the heart of the Microsoft .NET architecture. In addition to supporting the .NET initiative, Visual C++ .NET keeps all the productivity-boosting features you’re familiar with, such as Edit And Continue, IntelliSense, AutoComplete, and code tips. Visual C++ .NET also includes many new features such as managed code extensions for .NET programming, support for attributed code, and a more consistent development environment. These features take Visual C++ .NET to a new level. This book will get you up to speed on the latest technologies introduced into Visual C++.
标签： Visual particular Microsoft NET
上传时间： 2015-12-26
上传用户：qweqweqwe
Dijkstra算法求最短路径(C#版) using System using System.Collections using System.Text namespace Greedy { class Marx { private int[] distance private int row private ArrayList ways = new ArrayList() public Marx(int n,params int[] d) { this.row = n distance = new int[row * row] for (int i = 0 i < row * row i++) { this.distance[i] = d[i]
标签： System using Collections namespace
上传时间： 2013-12-29
上传用户：liglechongchong
We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (SNR), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all SNR values. For a given SNR, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.
标签： frequency-offset estimation quadrature amplitude
上传时间： 2014-01-22
上传用户：牛布牛
1. 先打开规则库，读入规则集 （可比较两个规则文件rule1.txt 和 rule2.txt的差异） 2. 选择经过分词和词性标注的文件，进行句法分析 3. 分析结果文件与测试文件在同一个目录下，文件后缀名为 .pcfg 4. 分析结束后，同时产生一个新的规则文件,后缀名为.new, 可以观察规则概率值和期望次数的变化 5. 分析结果逐个以树形图方式显示，如果一个句子有多个结果，在显示框中同时显示。
标签：
上传时间： 2013-12-28
上传用户：梧桐
Core Java 2 Volume I - Fundamentals, Seventh Edition Completely revised and up-to-date coverage of Generic programming, restrictions and limitations, type bounds, wilcard types, and generic reflection Swing GUI development, including input validation and other enhancements Exception handling and debugging, including chained exceptions, stack frames, assertions, and logging Streams and files, the new I/O API, memory-mapped files, file locking, and character set encoders/decoders Regular expressions using the powerful java.util.regex package Inner classes, reflection, and dynamic proxies Application packaging and the Preferences API
标签： Fundamentals Completely up-to-date coverage
上传时间： 2016-01-02
上传用户：标点符号
