共查询到20条相似文献，搜索用时 62 毫秒
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针对"无线传感器网络"课程实验教学,研发了一种基于无线片上系统MG245X的ZigBee无线传感器网络教学实验平台。设计并实现了该教学平台的总体架构、硬件电路、软件模板框架。通过该实验平台可以完成ZigBee无线传感器网络基础性实验、综合设计性实验、拓展创新性实验等实验内容,对于ZigBee无线传感器网络实验教学、功能演示、理论研究和实际应用都具有十分重要的意义。 相似文献
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为了提高无线心电监控系统的定位精度,提出了一种基于无线传感器网络监控平台的三边定位模式。基于该定位模式,研究了一种无线心电监控系统的跟踪定位算法;采用ZigBee协议设计了实时心电监控网络平台,利用微型心电传感器实时采集被监控对象的心电信息,利用三边定位技术,在监控平台上实现对被监控对象的定位处理。理论分析与实验结果表明:该系统能够迅速快捷地锁定被检测者的位置,可用于对中老人和病人进行远程监护。 相似文献
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基于无线传感器网络的环境监测系统设计与实现 总被引：1，自引：0，他引：1
环境监测采用基于CC2510的无线传感器网络具有明显的优势.CC2510是单片可编程UHF收发器芯片,内嵌8051内核,设计的节点具有功耗低、体积小并且支持自组网.本文对网络节点设计的各个功能模块进行了阐述,设计了一个小型的无线传感器网络;开发了上位机监控平台,通过监控软件可以实时地监测整个传感器网络区域内的各节点监测信息的实时变化.实验结果表明:该系统网络监测功能好、网络生存周期长、网络通信可靠稳定. 相似文献
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《实验室研究与探索》2020,(8)
设计了一套基于窄带物联网(Narrow Band Internet of Things,NB-IoT)的抽油机远程监控系统。该实验系统基于CVT-IOT-S5PX实验系统及NB-IoT节点和施耐德可编程控制器(PLC) Modicon M340,能够基于窄带物联网实现对抽油机工作状态的远程监测以及对抽油机电机转速的远程控制。该实验系统包括抽油机装置的参数采集、数据处理、NB-IoT网络通信和电动机转速控制等部分,通过基于该实验系统的课程实验,有助于学生对物联网和NB-IoT技术在自动化以及石油石化等相关领域应用的理解,能够在课程学习和课程实验过程中培养和提高学生面对复杂工程问题的创新意识和实践能力。 相似文献
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蔡丹琳 《泉州师范学院学报》2011,29(2):46-49
对基于无线传感器网络的监控系统结构进行设计,分析了采用ZigBee协议栈的无线传感器网络监控系统在数据链路层和网络层的性能.通过网络仿真器NS-2进行仿真实验,结果表明：ZigBee协议栈具有简单、高效、低耗的优点. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
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? 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
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. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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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. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献