嵌入式Linux在车载导航系统中的应用

描述了将Linux移植到基于MOTOROLA MXI处理器的目标板上的方法和过程。介绍了导航系统的原理，分析了嵌入式Linux操作系统及文件系统，并结合导航系统介绍了嵌入式Linux的具体开发步骤，着重介绍Linux内核的移植。结果证明该方法是可行的。移植后的Linux在目标板中运行良好。     

中文信息导航系统的关键软件技术分析

信息导航系统的设计与开发涉及广泛的技术问题。介绍了信息导航系统的特点和现状以及信息导行系统的总体设计，并主要就大规模中文信息导航系统设计中的关键软件技术进行了讨论，包括搜索引擎Robot、中文信息处理系统和导航系统相关服务的设计及其需要解决的主要技术问题，并提供了相应问题的解决方法。最后，简要提到了导航系统设计中需要解决的主要硬件技术问题。     

基于DSP的惯性组合导航系统精度改进算法研究

提出了一种新的提高DSP惯性组合导航系统计算精度的方法——三量分解法(TSA)，并且使用这种方法改进了惯性组合导航程序，综合测试和跑车试验结果表明，TSA能有效提高基于DSP的组合导航系统的解算精度，消除了计算误差，达到了导航计算机系统小型化、低成本、高性能的目标．     

SINS/GPS／陆标组合导航在平流层飞艇中的应用

针对平流层飞艇的飞行特点，本文提出了SINS／GPS／陆标组合导航方法，给出了SINS／陆标组合导航的观测模型，并将改进的Sage—Husa自适应滤波方法与联邦滤波相结合，用于SINS／GPS／陆标组合导航系统。数学仿真结果表明：新组合导航方法相对于SINS／GPS组合导航系统，可以有效改善平台误差角的估计精度，同时利用改进的自适应联邦滤波可有效提高全局滤波精度。     

嵌入式Linux在车载导航系统中的应用

描述了将Linux移植到基于MOTOROLA MX1处理器的目标板上的方法和过程。介绍了导航系统的原理,分析了嵌入式Linux操作系统及文件系统,并结合导航系统介绍了嵌入式Linux的具体开发步骤,着重介绍Linux内核的移植。结果证明该方法是可行的。移植后的Linux在目标板中运行良好。     

一石N鸟 同一网址查看多个网页

如今的网络分享方式提倡的是简约、简约、再简约，例如缩网址（与简单易记的网站域名有异曲同工之妙），而“ShareTabs”则在此基础上又强化了功能。它不仅可以缩短网址，还能够将多个网址聚合到此短网址上，且可利用Tab分页效果在一个网页中切换浏览其绑定的所有网址。这个升级版的缩网址服务应用领域还是很广阔的，例如“Twitter”、“飞信”等有字数限制的消息传递服务。     

车主谈心目中理想的车载导航系统

随着私家车不断增加，自驾游越来越成为居家旅行的一种新的生活方式，车载导航系统也逐渐成为车主的必备设备，众多的厂家发现这个巨大的商机，纷纷在自己的新车型上标配上车载导航系统。以前只有高档车上才会配备的车载导航系统，慢慢出现了一些中级车上，成为新车的一个卖点。在后装市场上，各种品牌的车载导航系统产品不断涌现，让一些中低端的车也能很方便地升级车载导航，早党到它带来的生活便利。     

基于ARM9-Linux平台的车载导航系统设计

随着嵌入式技术和汽车产业的迅速发展,车栽导航系统成为当今汽车产业界的一大热点.研究车载导航系统在提高行车安全性、减轻驾驶者员负担等方面具有很大作用,对解决城市交通问题具有重要意义.本文对车栽导航系统进行了研究,改进了传统的车栽导航系统.改进后的系统具有车辆定位、无线通信和信息综合显示等多种功能.由于采用先进的基于ARM9-Linux平台的嵌入式系统设计,从而提高了系统的性能、集成度以及可扩展性,同时使得该系统具有功能强、功耗低、可靠性高等特点.     

Maxthon收藏夹也玩个性化

上网时间久了，Maxthon的收藏夹里也搜罗了几十乃至上百个网址，在其中快速定位所需的网址也颇费心神。     

基于Dijkstra算法和OpenCV的交通导航

最短路径是交通路线导航系统的关键问题,使用Dijkstra算法可以有效解决简单有向网络图中任意两个顶点之间的最短路径问题。应用开源计算机视觉库(OpenCV)开发了模拟城市交通导航系统,该导航系统给出了直观的人机交互图像界面,在图像上标记好起讫点后,即运用Dijkstra算法寻找两地间的最短路径和距离,并可用图标标记最短路径节点、线段指示线路,最后模拟小汽车沿着最短路径线路行驶。     

网站导航栏设计的应用心理

导航栏的设计是每个网站设计的首要核心部分,它是整个网站的传送枢纽,导航栏的位置、颜色、层级关系设计的成功与否关系到浏览者的浏览兴趣,本文从这三个方面结合设计心理学研究分析导航栏设计的注意因素。     

DENIM: An Informal Web Site Design Tool Inspired by Observations of Practice

Through a study of Web site design practice, we observed that designers employ multiple representations of Web sites as they progress through the design process and that these representations allow them to focus on different aspects of the design. In particular, we observed that Web site designers focus their design efforts at 3 different levels of granularity-site map, storyboard, and individual page-and that designers sketch at all levels during the early stages of design. Sketching on paper is especially important during the early phases of a project, when designers wish to explore many design possibilities quickly without focusing on low-level details. Existing Web design tools do not support such exploration tasks well, nor do they adequately integrate multiple site representations. Informed by these observations we developed DENIM: an informal Web site design tool that supports early phase information and navigation design of Web sites. It supports sketching input, allows design at different levels of granularity, and unifies the levels through zooming. Designers are able to interact with their sketched designs as if in a Web browser, thus allowing rapid creation and exploration of interactive prototypes. Based on an evaluation with professional designers as well as usage feedback from users who have downloaded DENIM from the Internet, we have made numerous improvements to the system and have received many positive reactions from designers who would like to use a system like DENIM in their work.     

Navigation behavior models for link structure optimization

Analysis of existing methods for automatic optimization of link structures shows that these methods rely heavily on assumptions about the preferences and navigation behavior of users. Authors often do not state these assumptions explicitly and do not evaluate whether the assumptions are consistent with the actual behavior of the users of the site. This is a serious deficiency as experiments with simulated users show that incorrect assumptions can easily lead to inefficient link structures. In this work we present a framework that gives a systematic overview of alternative assumptions. On the basis of the framework we can select a set of assumptions that best matches the navigation behavior of the users in the site’s log files. We also present a method for optimizing hierarchical navigation menus on the basis of the selected assumptions. This method can be used interactively under full control of a web master. The system proposes modifications of the structure and explains why these modifications lead to more efficient menus. Evaluation by means of a case study shows that the modifications that are proposed effectively reduce the expected navigation time while preserving the coherence of the menu structure.     

基于NIOS II的导航系统平台的设计

介绍了一种新的基于NIOSII的导航系统的设计方案.NIOS是建立在FPGA上的嵌入式微处理器软核,由于它硬件设计上的灵活性和可裁减性,使得软件设计上"平台"的概念延伸到硬件设计中。本文就是把NIOSII硬件平台的方案,在导航系统计算机设计上进行了有益尝试,实践证明,本设计不但实现了预期功能,而且为以后在其他导航产品上快速的移植硬件和软件系统,提供了有力保证。     

Designing multimodal tracks for mobile users in unfamiliar urban environments

While there have been many studies of navigation design guidelines for integrating maps in mobile devices, we argue that the research focus should turn more towards the design of multimodal navigation aids, which would reflect the impact of typical human wayfinding behaviour. Therefore, we suggest an interdisciplinary design approach, i.e. building on urban design practice that focuses on supporting the navigation of pedestrians in urban areas. The design implications are explored in this study with the subjects being pedestrians accomplishing wayfinding tasks in an unfamiliar, urban area. The main areas that this paper contributes to are: investigating the design implications of multimodal navigation aids; evaluating these in the context of mobile wayfinding tasks; and reflecting the results according to the user's wayfinding strategies and spatial anxiety. It is concluded that through designing multimodal tracks into mobile navigation applications we can help users to find their way in unfamiliar, urban environments.     

基于MIMU/GPS组合导航系统的应用研究

根据车载导航系统发展现状,提出了一种基于GPS和MIMU技术的低成本的、可用于市场推广的组合导航系统方案。采用MIMU与GPS松散组合方式,以速度和位置作为观测量设计了Kalman滤波器。该方案以ARM9作为中央处理器,详细介绍了系统的设计与实现。经测试,该系统与传统GPS相比,具有更高的稳定性和更精确的导航精度。     

基于隐马尔可夫模型的兴趣迁移模式发现

Web挖掘的一个重要研究方向是发现用户的迁移模式。一般来说,用户的迁移具有某种目的性。这种目的性表现为用户对某种概念的兴趣。文中提出基于隐马尔可夫模型的兴趣迁移模式发现方法,用于发现这种带有某种兴趣的用户迁移模式,这种模式实质上是一种特殊的关联规则。在这种方法中,作者首先根据用户的访问记录定义一个隐马尔可夫模型,然后提出一种新的增量发现算法Increase_R用于发现兴趣迁移模式,同时给出了证明以说明该算法可以发现所有的兴趣迁移模式。     

一种移动机器人超声波导航系统

本文设计了一种用于移动机器人的超声波导航系统，介绍了系统的工作原理及结构， 并进行了样车实验．实际的导航实验表明：系统可用于室内结构环境中的移动机器人导航．     

Fuzzy logic techniques for mobile robot obstacle avoidance

This paper is concerned with the problem of reactive navigation for a mobile robot in an unknown clustered environment. We will define reactive navigation as a mapping between sensory data and commands. Building a reactive navigation system means providing such a mapping. It can come from a family of predefined functions (like potential fields methods) or it can be built using ‘universal’ approximators (like neural networks). In this paper, we will consider another ‘universal’ approximator: fuzzy logic. We will explain how to choose the rules using a behaviour decomposition approach. It is possible to build a controller working quite well but the classical problems are still there: oscillations and local minima. Finally, we will conclude that learning is necessary for a robust navigation system and fuzzy logic is an easy way to put some initial knowledge in the system to avoid learning from zero.     

浅谈如何设计成功的网站导航

网站导航是网站设计成功的关键．它提供获取信息的途径．并加强用户对网站的理解。本文主要从网站导航的位置、表现形式及布局方面进行分析．就如何设计成功的网站导航．提出自己的看法。