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This paper documents the results of the performance testing of netfilter, the firewalling subsystem of the Linux kernel. We compared the performance of two different hardware configurations and measured the throughput at plain routing, connection tracking, filtering and NAT. We also examined the dependency of the performance on the number or rules for iptables, nf-hipac and ipset.
Date : 2011-03-15 Size : 309.8kb User : wangtao_32801@126.com

跟踪与数据中继卫星系统 TDRSS(Tracking and Data Relay Satellite System)是为中、低轨道的航天器与航天器之间、航天器与地面站之间提供 数据中继、连续跟踪与轨道测控服务的系统。中继卫星系统的链路分为前向 链路与返回链路。前向链路指地面站经数据中继卫星转发信号,向用户航天 器(包括成像侦察卫星、航天飞机与载人飞船等)发送跟踪、遥测与控制指 令。返回链路指用户航天器经数据中继卫星转发信号,向地面站回传航天信 号。 本文以我国第二代中继卫星捕获跟踪(CTDRS)系统的预研项目“二代中 继星捕获跟踪系统仿真及验证”为科研背景,以课题的研究背景与意义为主 线,论述了课题在国内外的研究现状以及采用 STK(Satellite Tool Kit)完成星 间链路仿真设计的特点与优势,并对 STK 和 MATLAB 的仿真结果进行了一 定的分析。在以前的研究中,星间链路性能的研究主要侧重于分析星座参数 对星间链路几何参数的影响,本文重点分析在星座参数确定的前提下,星间 链路几何参数随时间的变化情况,包括星间链路距离变化率、星间链路方位 角变化、星间链路仰角变化等参数。 其中讨论了二代中继星捕获跟踪系统星间链路的仿真方案的组成结构, 利用轨道特性对二代中继卫星系统的覆盖特性进行分析,搭建了星间链路的 仿真模型,其中包括中继卫星和用户卫星在内的轨道模型、星间链路模型、 用户星信号调制模型等,并对星间链路建立过程的影响进行分析;重点针对 星间链路建立过程的信号特性,轨道模块的建立、多普勒频移技术、背景噪 声影响、载波的捕获与跟踪技术等进行了实际参数的设计与理论分析。 本文主要针对中继卫星星间链路捕获跟踪系统的链路仿真及验证问题, 从理论基础到具体仿真实现分别进行了分析与论述。文中详述了星间链路的 轨道特性及传输特性的仿真过程和分析,为完成星间链路目标捕获与跟踪系 统链路的仿真和验证所建模。经过详细的分析,给出了一些有用的结论。为 我国第二代中继卫星系统的工程研制提供有说服力的技术依据,具有一定的 理论和实际意义。
Date : 2011-03-24 Size : 713.88kb User : leen0247@yahoo.com.cn

This paper presents a data-oriented tracking framework which aims to recover the spatio-temporal trajectories for an unknown number of interacting objects appearing and disappearing at arbitrary times. Data association is performed at three-levels of a hierarchy: (i) rst, trajectory segments and an associated quality measure are generated by a local analysis of the space-time distribution of observations; (ii) a conservatively constrained association step links nearby consistent segments into intermediate trajectory fragments; and (iii) a last as- sociation step taking into account all available data (observations, trajectory fragments) generates the nal trajectory estimates. The association step relies on the Hungarian algorithm and it also con- siders detection responses below the detection threshold as evidence associated with high ambiguity. We demonstrate the feasibility of the proposed approach applied to the pedestrian tracking task on two challenging datasets.
Date : 2011-05-19 Size : 865.58kb User : kongsuhongbaby@126.com

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被动导引头辐射源跟踪新算法研究:粒子滤波+UKF的跟踪方法文献-The passive seeker radiation source tracking the new algorithm: particle filter tracking methods literature+UKF
Date : 2026-01-02 Size : 429kb User : jhch

系统介绍了电视跟踪理论,做跟踪的必读书籍,内容简单易懂!-system introduced TV tracking theory, so tracking of study books, easy to understand and simple!
Date : 2026-01-02 Size : 2.96mb User : 赖做梦

电子书籍,不错滴 今天,越来越多的开发人员都想编写分布式的,事务型的企业及应用程序,以及平衡速度、安全及服务器方可靠度的技术。如果你已经在这个领域工作,你应该知道在当今的快速变换及需求的电子商务及信息技术的世界里,企业应用程序需要设计、编译、产生低价位的、高速的、占用少量资源的程序。 为了缩减开发成本,快速跟踪企业应用的设计和开发,J2EE技术提供了基于组件的设计方法,开发、集成、部署应用程序。J2EE平台提供了多层分布式应用模式,使具有重用的能力,并集成了基于XML的数据交换——一个统一的安全模式及灵活的事务控制。 -electronic books, good drop today, more and more developers want to prepare distributed, Service-oriented enterprises and application procedures, and to balance speed, security and reliability of the server side technology. If you already work in this field, you should know that in today's rapidly changing and the demand for e-commerce and information technology world, enterprise applications need to design, compile and produce the low-cost, high-speed, taking up a small amount of resources procedures. To reduce development costs, fast tracking enterprise application design and development, J2EE technology provides a component-based design, development, integration and deployment of applications. J2EE platform offers a multi-tier distributed application model, with the ability to reuse
Date : 2026-01-02 Size : 3.66mb User : li

基于Camshift和Kalman滤波的仿人机器人手势跟踪-Camshift and based on Kalman Filtering Humanoid Robot Hand Tracking
Date : 2026-01-02 Size : 1.03mb User : 王其军

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IP反向追踪技术综述 拒绝服务攻击(DoS)给政府部门和商业机构造成了严重的经济损失和社会威胁。IP追踪技术能够反向追踪IP数据包到它 们的源头,所以是识别和阻止DoS攻击的重要一步。本文针对DoS攻击,对比分析了各个IP反向追踪方法的基本原理和优缺点。 关键词 DoS攻击 主动追踪 反应追踪-IP traceback Technology denial of service attacks (DoS) to government departments and commercial organizations have caused serious The economic losses and social threats. IP tracking technology to backtracking IP data packets to their source, So it is to identify and stop DoS attacks important step forward. This paper DoS attacks, comparison and analysis of the various IP traceback method of the basic tenets of advantages and disadvantages. Keywords DoS attack response tracking initiative tracking
Date : 2026-01-02 Size : 38kb User : air

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基于轮廓追踪的字符识别文章,把小波和分形维相结合-Based on the outline of the character recognition tracking articles, the wavelet and fractal dimension of combining
Date : 2026-01-02 Size : 275kb User : 王茜

基于面部动画参数抽取的特征跟踪,做模式识别方面的比较适合-Based on the facial animation parameter extraction of feature tracking, and more suitable for pattern recognition aspects
Date : 2026-01-02 Size : 151kb User : 111

SoftIce的逆跟踪缓冲和一些高级命令 此文解释了一些我们喜欢的Softice中最不常用的命令。此文的目的是想给出这个优秀的工具能为我们带来的更加强大的功能。-SoftIce inverse tracking a number of senior command buffer and this article explains some of our favorite non-Softice most commonly used commands. The purpose of this article is to give an excellent tool to bring us a more powerful functions.
Date : 2026-01-02 Size : 87kb User : oshine

详细介绍了(同步信号块处理)方法在静态软件接收机数据处理方面的应用。首先说明了的基本思想,然后具体介绍了捕获时根据相位差求精频的方法,以及在跟踪时使用理想相关方法进行码跟踪,使用相位差方法频率跟踪的详细过程,最后,在一个码周期内数字化码非整数的采样率下,提出了首尾相接的改进方法,成功实现了软件数据的跟踪。-Described in detail (synchronous signal block treatment) method in the static receiver data processing software applications. First of all, illustrates the basic idea, and then introduce a specific capture refinement based on phase-frequency method, as well as in tracking the use of the ideal correlation method for code tracking, frequency tracking using the phase difference method of the detailed process, finally, 1 yards in the cycle within the digital code of non-integer sampling rate, the proposed improvements in both phase methods, the successful implementation of data tracking software.
Date : 2026-01-02 Size : 510kb User : 何宁

基于新型DSP-BF533的嵌入式运动图像目标跟踪系统的设计和方案-Based on the new DSP-BF533 Embedded Motion Picture target tracking system design and program
Date : 2026-01-02 Size : 124kb User :

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buzilla软件,bug跟踪软件,谢谢大家免费下载-buzilla software, bug tracking software, thank you for free download
Date : 2026-01-02 Size : 3.18mb User : 叶子

人脸检测和跟踪学位论文;人脸检测定位:运动区域检测预处理, 肤色区域的分割和利用二值形态学等操作的人脸粗检,利用眼、嘴特征的彩色信息检测的人脸细检,利用投影法检测眼睛和嘴巴亮块的人脸定位。提出了一种基于自适应肤色模型匹配与验证的方法对人脸进行跟踪-Face detection and tracking dissertation Face Detection positioning: Sports regional detection pretreatment, color region segmentation and the use of binary morphological operations, such as human faces rough seizure, the use of eyes, mouth features detection of color information Face Fine Frederick, using projection method bright eyes and mouth block face positioning. A model based on adaptive color matching and validation of the method of face tracking
Date : 2026-01-02 Size : 3.46mb User : 田卉

Abstract—Stable direct and indirect decentralized adaptive radial basis neural network controllers are presented for a class of interconnected nonlinear systems. The feedback and adaptation mechanisms for each subsystem depend only upon local measurements to provide asymptotic tracking of a reference trajectory. Due to the functional approximation capabilities of radial basis neural networks, the dynamics for each subsystem are not required to be linear in a set of unknown coeffi cients as is typically required in decentralized adaptive schemes. In addition, each subsystem is able to adaptively compensate for disturbances and interconnections with unknown bounds.
Date : 2026-01-02 Size : 148kb User : centema

Wiley - Estimation with Applications to Tracking and Navigation-Wiley- Estimation with Applications to Tracking and Navigation
Date : 2026-01-02 Size : 42.41mb User : Janny

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code for 3-d based vehicle tracking system
Date : 2026-01-02 Size : 1kb User : Shashidhara

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Cv中文参考手册 图像处理 结构分析 运动分析与对象跟踪 模式识别 照相机定标和三维重建 -Cv Reference Manual motion analysis image processing structure of pattern recognition and object tracking camera calibration and 3D reconstruction
Date : 2026-01-02 Size : 2.55mb User : 麦高

Design and Analysis of Modern Tracking Systems(下),第十章到最后一章688页到1257页,Samuel Blackman, Robert Popoli,和大家分享!(Design and Analysis of Modern Tracking Systems)
Date : 2026-01-02 Size : 31.27mb User : 聆听305
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