Based on dsp and embedded techniques , this paper mainly describes a design of dsp module of marine navigation radar system . and the software algorithm design and system design of dsp module is the emphasis of the paper 本文设计实现了船舶导航雷达系统的数字信号处理模块,重点研究了数字信号处理模块的软件算法,给出了dsp系统的软件实现方案。
The configuration control system based on embedded technique has the logical control function imitating plc and the animate picture monitoring function , also has convenient control strategy configuration and monitoring picture strategy configuration quomodo 基于嵌入式体系结构的组态控制系统具有仿plc的控制功能和动画效果的监控功能,同时具有简易的控制与监控策略组态开发方式。
With the development of networks and embedded technologies , more and more importance has been attached to how to combine embedded techniques with traditional gereral - purpose communication protocols . different embedded systems have different criterias such as response time and real time for the communication protocols , so cutting out conventional tcp / ip suitable in the embedded system has become the key problem when designing an embedded communication protocol stack 随着网络和嵌入式技术的发展,如何将普通的通信协议栈和嵌入式系统更好地结合起来成为人们越来越关注的问题。由于不同的系统对嵌入式通信协议栈的实时性和响应时间等指标有不同的要求,所以将传统的tcp / ip裁剪为适合在嵌入式系统中运行的通信协议栈成为设计嵌入式通信协议栈的最关键问题。
As a crucial embedded development tool , the embedded system debugger is usually used to debug and test embedded software 。 a embedded system debugger consists of a cross debugger and a debugger agent , which characteristic lies in the separation of running environments between the cross debugger and the debuggee and the dependence on the gdb agent in the debug session 。 with the development of embedded technique , various embedded debug techniques continuously advance and all kinds of embedded system debuggers are playing a more and more important role in the embedded software development 。 the gnu debugger , gdb as a tool in the gnu toolkits , is an extremely powerful source - level debugger 。 among gdb ’ s many noteworthy features , its ability to debug programs “ remote ” is fascinating 。 this capability is not only essential when porting gnu tools to a new operation system or microprocessor , but it ’ s also useful for developers who need to debug an embedded system based on a processor that gnu already supports 。 gdb is the preferred solution in embedded development because it provides portable , sophisticated debugging over a broad rang of embedded systems 。 this paper discusses the status quo of various embedded system debuggers ; deeply analyses the overall structure of gdb and the debugging mechanism of gdb based on its source codes ; introduces the gdb ’ s remote debug technique and gdb / mi , which are usually used to develop the gdb - based embedded system debugger 。 then dwells on how to use gdb / mi to develop a gui front and how to use rsp 、 stub and gdbserver to design a debug agent , in order to expatiate on the design method of the gdb - based embedded system debugger 。 in the end , provides a concrete implementation of the gdb - based embedded system debugger of “ embedded simulation development platform ” , the project of the innovation fund for technology based firms 。 这个特性不仅在将gnu工具移植到一个新的操作系统和微处理器的时候很有用,对于想调试一个基于gnu支持的芯片的嵌入式系统的开发人员来说,也是非常有用的。由于gdb提供了在大多数嵌入式系统上的可移植的、复杂的调试功能,它已成为嵌入式开发的首选解决方案。本文讨论了当前的各种嵌入式调试器的现状,结合源代码详细分析了gdb的结构和调试原理,介绍了开发基于gdb的嵌入式系统调试器常用的远程调试技术和gdb / mi接口;然后详细阐述了如何使用gdb / mi开发gdb的图形前端和怎样使用rsp协议、 stub和gdbserver设计一个调试代理,从而较深入地讨论了基于gdb的嵌入式调试器的设计方法;最后,结合国家中小型企业创新基金项目“嵌入式仿真开发平台” ,给出了一个基于gdb的嵌入式系统调试器具体实现。
At present , compared with traditional mufti - media surveillance system , the burgeoning mpeg - 4 surveillance system based on embedding techniques has many advantages such as small volume , with no user ' s operation , low cost , high stability , good real - time properties as well as convenient storage and transmission , thus it has favorable application and developing prospect 目前新兴的基于嵌入式技术的mpeg - 4视频监控系统与传统的视频监控系统相比具有体积小、现场无需专人值守、成本低、稳定性高、实时性好、更适宜存储和传输等优点,具有良好的应用与发展前景。
Firstly , by analyzing former researches and visible watermark characteristics , a visible watermarking algorithm with feature of holding image content is realized . secondly , using redundant embedding technique to embed watermark and extracting watermark according to watermark content , a meaningful invisible watermarking scheme is proposed ; thirdly , combining with vision characteristics a resilient - prone scrambling algorithm and a restoring scheme of scrambled image with data loss are proposed , image scrambling technique of irregular region is discussed . based on the proposed algorithms , a digital watermarking system scheme is designed 通过分析前人的研究进展,结合可见水印特性,在小波域实现了一种具有图像内容保持特性的可见水印算法;利用水印冗余嵌入技术进行水印嵌入,根据水印遭破坏的情况进行水印提取,给出一种有意义水印的嵌入和提取方案;结合视觉冗余特性提出并实现了一种易于恢复的图像置乱算法和一种受损置乱图像的恢复方案;探讨了不规则区域的图像置乱方法,在此基础上,设计了一种置乱算法在数字水印算法中的应用框架;最后整合本文所提出的算法,实现了一个基于视觉特性的图像水印系统。
In the frequency domain , we analyse the information hiding technique based on dct . we present improved adaptive hiding method , odd even embedding technique , improved amalgamation and difference matrix hiding method in the dct domain . we describe the process of information embedding and extraction , and analyse the robust of the algorithms above in detail 在频率域内，我们研究了基于dct变换的信息隐藏技术，提出了改进的dct自适应隐藏算法、 dct域奇偶性嵌入算法和改进的融合算法，同时提出了差值矩阵的dct域隐藏算法，给出了这些算法的信息嵌入与恢复过程，并对频率域内的这些隐藏算法的鲁棒性进行了分析。
To take a new research object of embedded techniques , this article defines embedded techniques synergy and analyzes different classifications of it , then studies the motive and achieving process of it , finally establishes mechanisms of constructing and run this synergy mode by analyzing main influence factors 从技术嵌入的新视角研究供应链企业间协同，首先明确了技术嵌入式协同的概念，分析了技术嵌入式协同的几种类型；然后对其协同动机以及协同实现过程进行了阐述；通过分析技术嵌入式协同的主要影响因素，提出了构建和运行这种协同方式的机制。
Since the existed research has n ' t illuminated the failure form of post - embedded reinforcing steel bar bonding anchor and its mechanism , has n ' t systematic research on factors influencing the function of post - embedded reinforcing steel bar bonding anchor , and also failed to test on the long period validity of post - embedded reinforcing steel bar bonding anchor , it is very unfavorable for the spread and application of post - embedding technique . in the meantime , the fact that the present post - embedding anchoring material is of few kinds , high prices and still - to - be - improved performance has become the bottleneck of the post - embedding technique ' s development , which has restricted its further application and development . therefore , it is of great importance to develop a new type high - performance inorganic anchoring material with reasonable price and improved performance 由于已有研究对后植钢筋粘结锚固的失效形式、破坏机理未作出明确回答，对后植钢筋粘结锚固性能的影响因素未进行系统研究，对后植钢筋粘结锚固的长期有效性未予以试验证实，不利于植筋技术这种新型结构加固技术的推广应用，同时现有植筋锚固材料存在品种少、价格高、性能需要进一步改进和提高等局限性，已成为植筋技术发展的瓶颈，制约了植筋技术的进一步应用和发展，因此开发价格合理、性能优良的新型高性能无机质类锚固材料就显得尤为重要和迫切。
