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1.
针对在水下环境应用日益广泛的无线传感器网络及其所面临的网络节点数据实时处理能力有限的现状,提出了一种新的设计解决方案,即基于ARM的水下无线传感器节点设计方法;采用灵活的直接数字合成的信号产生方法;将其与ARM的数据计算处理能力、嵌入式系统移植的特点结合起来,充分发挥两者的优势,完成一种具有优势的水下无线传感器网络节点设计。 相似文献
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无线传感器网络WSN是由分布在给定区域内大量无线传感器节点构成的一种新型信息获取系统,而无线传感器硬件节点的设计与实现是其应用的关键和基础工作.针对将无线传感器网络应用在青藏铁路沿线多年冻土区典型段进行地温、变形监测方面的特殊要求,设计了一种无线传感器网络系统,该网络由大量普通传感器节点、若干网关节点及一台计算机构成.无线传感器节点布撒在需要监测的区域内.将所探测到的有用信息通过初步的数据处理和信息融合之后,通过相邻节点接力的方式传送给网关节点.网关节点通过无线方式接收各传感器节点的数据并以有线的方式将数据传送给最终用户计算机.本文详细介绍了一种基于CC2431的网关节点以及基于C8051F320的USB接口的软硬件设计与实现. 相似文献
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随着无线传感器网络技术的发展,其应用价值遍布环境监测、工农业、抢险救灾、军事国防、生物医疗等许多领域.由于无线传感器网络特征与节点特点,其数据存储与查询策略研究成为热点.对已有的数据存储策略进行了详细介绍与研究,并分析它们的优缺点;其次结合大数据中一种高效的数据存储结构——RCFile,并将其应用到传感器网络的数据存储中,结合行列存储的优势,改变数据存储结构,提出了一种基于RCFile的无线传感器数据存储算法(Wireless sensor network Data Storage based on RCFile,WDSR),并给出了仿真结果分析.仿真结果表明,提出的算法在低能耗、高效率方面存在一定优势.最后指出了无线传感器网络数据存储算法的发展方向. 相似文献
4.
CC2510在无线传感器网络节点中的应用研究靠 总被引:1,自引:0,他引:1
介绍了一种基于内嵌51内核的单片可编程UHF收发器芯片CC2510的无线传感器节点的设计,以及基于这种节点的通讯协议.由该节点组成的无线传感器网络功耗低、节点体积小,实现了随机分布的传感器网络自组织和数据的多点跳传. 相似文献
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可用于无线传感器网络的声信号通信方式,不占用无线电通信频率带宽,无射频干扰,在诸如环境监测、军事侦测等领域有广泛的应用前景。研究了一种基于相移键控(PSK)调制声通信的无线传感器网络节点系统。节点系统采用ARM+FPGA的结构,核心控制器为具有低功耗休眠模式的STM32型ARM芯片,FPGA用于进行数据缓存和部分数据处理,采用PZT型扬声器实现声信号的收发。测试表明:节点系统可以在10m范围内进行数据通信,数据码率300bps,误码率小于10-3,系统最大功耗小于0.1 W,最低休眠功耗小于10μW。 相似文献
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支持无线传感器网络的关键技术包括支撑传感器节点工作的操作系统平台设计,以及节点之间的无线通信网络系统设计.本文以当前的普适计算与无线传感器网络的研究为背景,以解决无线传感器网络的关键技术为核心,提出了一种新型的无线传感器网络的应用系统结构的设计,以及传感器节点的设计,并研究了无线传感器网络的MAC层协议的设计准则. 相似文献
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非打扰式无线传感器网络测试仪的设计与实现 总被引:1,自引:0,他引:1
无线传感器网络的测试工具对于传感器网络的深入研究和应用具有重要意义。提出了一种非打扰式的无线传感器网络测试方法,并介绍了基于该方法的无线传感器网络测试仪的设计思路和详细实现。该测试仪采用可编程逻辑阵列(FPGA)高速采集传感器节点的内部互连信息,并将采集的信息通过额外网络传输到测试服务器进行集中处理,还原节点状态信息和获取整个无线网络的通信情况,避免了对传感器网络节点运行和无线通信的影响。实验测试表明,该测试仪可以很好地获取节点状态,并在数据采集的过程中不干扰节点的正常工作。 相似文献
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TinyOS的汇聚树协议研究 总被引:1,自引:0,他引:1
何朝娟 《单片机与嵌入式系统应用》2011,11(1):3-5,16
无线传感器网络是一种能量和计算能力受限的应用相关的网络.汇聚树协议(Collection Tree Protocol,CTP)是TinyOS中一种基于无线传感器网络应用的数据汇聚协议.CTP是一个基于树的汇聚协议,在网络中设置若干汇聚根节点,节点通过与邻居节点交换相互的链路质量估计信息来选择父节点作为下一跳,从而建立起... 相似文献
11.
S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
12.
European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
14.
Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
18.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
19.
张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
20.
Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献