一种卫星电视快速自动定位和跟踪系统

为实现对卫星信号的快速搜索和高精度指向,提出一种利用三维电子罗盘对卫星实现自动定位的系统.通过对步进跟踪过程的分析,结合系统模块化设计思路,分析和设计了自动定位系统的硬件模块和软件中的控制算法.为提高整个系统的抗干扰能力和跟踪精度,采用空间坐标式跟踪来代替十字跟踪,从而快速准确地进行卫星定位.     

探析高性能全站仪在动态测量中的应用

针对TCA/TCRA全站仪动态测量特性,利用GeoBASIC软件,分析了动态跟踪测量技术,并进行了TCA/TCRA精神分析,为动态馈源跟踪测量提供了可行参考.     

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。     

基于TMS320DM642 DSP的实时视频监控系统实现

为了实现视频监控运动目标自动检测和跟踪的应用要求,设计了基于高性能DSP的运动目标跟踪嵌入式系统。该系统利用视频格式YUV420模型的Y分量进行运动目标检测,并以目标的形心为跟踪点,通过绝对误差和判决标准对运动目标进行跟踪;最终利用协同控制策略对摄像头进行控制,保证运动目标长时间保持在视野范围内。该系统通过基于DSP硬件结构的各软件模块优化,提高系统的处理能力,实现了系统的高效跟踪。     

电视跟踪系统仿真

针对一具体被跟踪对象,建立仿真模型,利用Vc＋＋6．0编程来实现将数字图像处理与视频跟踪相结合,采用合适的跟踪算法提取跟踪误差,从而达到跟踪目标并处理目标图像计算机仿真的目的。     

新兴网络科技下的基础法语教学

"基础法语I"和"基础法语II"的授课对象是大一学生。网络发达的今天,各种网上学习软件和手机APP已经走进了人们的生活中。特别是对随着互联网的发展而出生的学生来说,互联网和手机是他们生活的一部分。如何充分利用学生的学习特点,利用手机软件来帮助基础阶段的学生来学习法语是一个值得我们探讨的问题。通过网络和手机APP,教师可以发送课前预习作业,课件和课后测验。其次软件还能给教师提供学生答题的各种数据。因此教师可以通过软件给出的数据找出学生的问题。学生还能通过软件相互之间进行互动,帮助解答问题,也可以求助老师来解决。学习软件的存在可以使得学生的问题得到及时解决,同时也帮助教师更好的监督和跟踪学生的学习情况。     

基于光流场的实时视频中运动目标的检测与跟踪

实时性是运动目标检测和跟踪技术中一个重要的要求。本文设计并实现的一种实时视频中运动目标的检测与跟踪系统,利用usb摄像头采集实时视频,光流场法检测与跟踪运动目标。在MATLAB的软件环境里,将GIUDE方便的图形界面布局与强大的计算机视觉库工具箱结合起来,界面清晰简明,显示实时。     

便携式两轴跟踪转台结构及控制系统的设计

主要对跟踪转台的伺服控制系统进行了设计和研究,阐述了跟踪转台的工作原理及其功能。综合考虑到一些影响转台稳态精度和动态性能的因素后,采用两环反馈来设计控制系统从而完成了对整个伺服控制系统的硬件和软件的整体设计。     

基于OPENCV平台的运动物体跟踪与轨迹生成研究

在比赛项目中,对运动员进行跟踪和分析,精确计算运动员的体能消耗和状态是十分必要的。一个新兴的交叉学科SportsIT,就是利用先进的计算机图形图像技术来分析各种比赛时运动员状态。在此背景下,利用OPENCV平台,实现运动物体的实时跟踪,生成轨迹和长度。实现了对艺术体操运动进行识别和追踪,生成运动轨迹。首先采用camshift方法进行跟踪,当遇到相似的背景导致跟踪失败时,采用帧间差分算法对运动物体再次识别,在出现多个候选运动目标中挑选出距离跟踪失败坐标点最近的运动目标,找回跟踪物体。     

Origin对动态磁滞回线实验数据的处理方法

本文论述了磁性材料磁滞回线测量的基本原理,采用数字示波器光标的实时跟踪功能测量了磁滞回线上的42个点的坐标值,利用数字电流表和电压表记录B和H的定标值,然后采用origin软件对所测的数据进行线性拟合、绘制磁滞回线的图形。实践证明利用数学软件origin是优于传统的手工计算与作图的数据处理方法,且处理结果完全满足实验数据处理要求,适合在实验教学中推广。     

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,     

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?     

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.     

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.     

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.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

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.