基于MEMS传感器的车载组合定位系统设计

车载组合定位是现代汽车常用的定位方式,它通过集成化的传感器及卫星定位系统,实时定位车辆位置,在现代错综复杂的城市交通中有着广泛的应用.本文以微小型车载组合定位系统为对象,设计了基于ARM嵌入式系统的微小型车载组合定位系统,借助MEMS传感器设计的惯性导航系统、GPS导航及相应的融合算法,实现对车辆的实时高精度的定位.     

车载GPS系统及绘图引擎的设计研究

嵌入式环境有限的计算能力和存储空间对车载GPS系统性能有着重要影响。为了能在有限的条件下高效地表现丰富的图形效果,必须根据嵌入式的特点进行有针对性的研究和设计。在介绍GPS系统的基础上,针对车载GPS系统绘图引擎设计的一些关键问题进行深入了研究和讨论。     

基于GPRS的车辆定位和监控系统的设计与实现

对GPS和GPRS的相关内容进行了介绍.根据现代车辆定位和监控系统的实际需求,以中国移动的GPRS网络作为通信链路,以原有的GSM为备份链路,设计了车辆GPS定位和监控系统,分析了系统的组网方式、主要特点和车载终端原理.其基本功能是在移动车载终端、GPRS网以及Internet网络之间传输实时数据,并将数据呈现给用户.     

基于代价函数的车载导航系统地图匹配算法

车载GPS导航系统有着巨大的市场潜力,它的关键技术是各类导航技术的相关算法。经过对地图匹配算法的研究,本文改进了基于代价函数方法进行地图匹配,通过合理地定义代价函数有效消除了存在于匹配路段挑选过程中的模糊性问题,在算法基础上研发出车载GPS导航系统。结果表明,应用该算法可以为组合导航系统的定位精度带来明显的改善。     

基于GSM网络的公交导航系统设计

本文主要基于GPS的车载信息系统终端涉及GPS定位技术、计算机科学技术、GSM/GPRS无线通信技术和电子技术,在汽车上实现GPS数据的接收和记录,利用GSM/GPRS网络的数据传输功能,实现移动车辆与监控中心的双向数据传输,对车辆进行跟踪和远程监控.     

基于Java Applet技术的GPS客户端设计与实现

探讨了车载GPS监控系统的技术结构和主要功能,以及基于JavaApplet的客户端软件的设计与实现策略。重点讨论了运用MVC模式来实现车辆实时跟踪面板,以及历史回放面板中Jfreechart动态曲线的实现和利用线程控制曲线的方法,同时给出了关键的算法。系统编程和测试表明使用XML传递数据,JavaApplet能够很好地满足车载GPS客户端软件的开发。     

GPSONE定位模式硬件设计方案

车辆的监控定位可以提高对车辆的管理效率。GPSONE技术是一种应用和改善GPS定位技术的方案。本文通过对GPSONE模块选型等内容研究，设计了车载监控GPSONE终端系统模型，并初步拟定了GPSONEZ硬件设计方案，为GPSONE车载定位技术的应用奠定了硬件基础。     

车载无线系统定位系统设计

基于无线传感网络的车载虚拟雷达协同定位系统,能够实时显示周围邻居车辆运行状态,包含车速、方向、预警信息等,以提高车辆对周围道路交通环境综合感知能力,降低道路交通安全风险。系统主要包括支持自组织时分复用（STDMA）通信的车载无线传感模块、虚拟雷达仪表显示、树莓派核心处理单元以及相应的板载通信电路。车辆通过与智能基站进行周围性消息广播,对自身地理位置信息及周围其它车辆的地理位置信息进行精准估计。在对协同定位系统进行硬件电路设计的同时,还利用Visual Basic对系统软件的工作界面进行设计,能够直观显示周围邻居车辆的运行状态信息,实现对车辆在全球定位系统（GPS）信号弱或无GPS信号下的精准协同定位和显示。系统具有较好的实时性和精准度,能够为当前智能车辆以及未来无人驾驶的高精度定位服务要求提供保障。     

基于GPS的车辆管理系统的扩展应用与理论分析

GPS是一种全球性、全天候、连续的卫星无线电定位系统．可提供实时的三维坐标的位置、速度等空间信息和高精度的时间信息。主要研究GPS系统在汽车管理中的扩展应用。     

GPS在物流中的应用

本文首先阐述物流中应用GPS的必要性,描述了物流信息化建设中对GPS的需求,然后详细阐述了物流中实施GPS的技术构成,包括车载接受部分、控制中心等,最后指出了应用GPS技术目前存在的几个问题。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.