共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
设计实时的脑组织血氧量、肌肉组织血氧量和瞬时心率无损同步检测方案与设备,为研究高强度运动对心脑冲击影响、探讨高强度运动中代谢规律提供测试手段.采用双波长近红外光组织氧检测电路测量脑和肌肉中血红蛋白的变化情况;采用心电极检测心率;以nRF9E5为核心设计电路对脑氧、肌氧和心率进行同步采集和无线传输;以PC配接nRF9E5接收电路描记运动中脑氧、肌氧和心率的变化.进行100米跑和套路演练实验,得到了相关数据.脑氧、肌氧和心率无线实时同步采集系统的设计在运动监控和研究中具有重要作用. 相似文献
3.
基于LEACH协议的人体生理参数无线监测网络的实现 总被引:1,自引:0,他引:1
无线人体生理参数监测技术可以实时监测运动状态下的人体机能信息,并可完成对运动危险实时分析及实时预防等功能,在运动医学中具有重要意义,为此设计了基于LEACH协议的无线人体生理参数监测网络系统.首先介绍了LEACH路由算法的基本思想,设计了心电采集节点和血氧采集节点的硬件电路,叙述了基于NRF24L01的无线监测网络的实现,并对各模块和整个系统进行了联机调试,最后还进行了无线心率检测和血氧饱和度组网测试. 相似文献
4.
5.
提出了一种基于Zigbee技术的人体心电信号无线监测系统设计方案;采用Zigbee技术和STM32W108ARM芯片设计了系统采集节点和汇聚节点的硬件电路,采用C语言编写了其软件,实现人体心电信号的采集和无线传输;利用Labview软件设计人体心电监测界面,实现了利用PC机对采集到的心电信号进行实时监测;实验表明,该监测系统通信质量良好,能够实现心电信号的采集、波形显示,以及心率值和心电频谱的分析,在家庭医疗领域具有较高的应用价值。 相似文献
6.
心率是反映人体心血管系统状态的重要依据.基于视频的非接触式心率检测凭借其场景适应能力强、成本低等优势,得到了广泛应用.然而,这种检测方法容易受到光照变化、目标运动等噪声干扰.针对该问题,本文提出了一种基于振动相位信号分解的腕部表皮视频心率提取方法,其核心思想是设计方向选择的复可控金字塔搜索出脉搏信号的带通范围,使用信噪比进行脉搏信号的感兴趣选择,使用鲁棒主成分分析从混合信号中分离出脉搏信号,从而最终实现脉搏信号抗噪的心率检测.本文自行采集了心率检测数据集,并使用脉搏检测仪作为真值进行方法验证.在干扰场景下准确率为97.80%,与3种主流方法对比准确率提升均大于5%. 相似文献
7.
目的 心率是反映人体心血管状况和心理状态的重要生理参数。最近的研究表明,光电容积成像技术可以在不接触人体的情况下,利用消费级的摄像机捕获面部表皮颜色的变化进而估计心率。然而,在实际环境中,面部运动带来的干扰会导致心率检测的准确性下降。近年来,国内外学者已经提出了一些方法来去除运动噪声,但是效果均不理想。为了解决上述问题,提出一种可以抗面部运动干扰的新方法。方法 首先检测和跟踪受试者的脸部。然后将脸部区域分块,并提取各块的色度特征建立原始血液容积脉冲矩阵,利用自适应信号恢复算法从原始血液容积脉冲矩阵中分离出低秩矩阵并构建期望血液容积脉冲信号。最后通过功率谱密度估计心率。结果 在环境光作为光源的条件下,利用网络摄像头采集30名受试者的人脸视频进行实验分析。结果显示,提出的方法测得的心率与参考值具有很强的相关性:在静态场景中皮尔森相关系数r=0.990 2,在动态场景中r=0.960 5。并且与最新方法相比,动态场景中的误差率降低了53.90%,相关性提高了7.46%。此外,在10 min的心率检测实验中,方法的测量值与参考值保持着良好的一致性。结论 本文方法优于现有的非接触式心率检测技术,能有效地消除面部运动带来的干扰,长期稳定地检测心率。 相似文献
8.
根据人体心电信号特征,提出了一种基于全球移动通信系统(GSM)的无线心率监控系统。系统由采集终端和监控终端组成。采集终端采用光电脉搏传感器HKG-07B对人体的脉搏信号进行采集,调理后输出的信号由单片机SPCE061A完成数据计算、存储、显示和语音播报功能。根据计算得到的心率值,通过TC35I模块以短消息的方式向监控终端完成远程报警。实验测试结果表明:系统采集的心率数据精度满足性能要求,并且能够实现实时的无线心率监控。 相似文献
9.
10.
王思 《计算技术与自动化》2020,39(3):140-146
在运动训练过程中,采集工作是关系到运动员训练水平的关键。将多传感器的思想应用到信息融合技术上,通过多个传感器和摄像机分别对运动员的关键指标进行采集。前者是利用小波变换实现对人体表面肌电信号的特征提取,然后使用人工神经网络法对关键的特征的进行识别,得到初步人体运动评估结果。后者是对图像视频经过前景提取、特征提取、识别姿态及评估进行处理。提高了人体疲劳评估准确率,从根源上解决了传统系统的采集准确率地下的问题,经过科学指导,提高运动员训练水平,对于信息融合技术具有重要的作用。 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
13.
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
15.
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
16.
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
17.
David Poole 《Computational Intelligence》1989,5(2):97-110
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given. 相似文献
18.
Watts S. Humphrey 《Annals of Software Engineering》2002,14(1-4):39-72
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical. 相似文献
19.
基于复小波噪声方差显著修正的SAR图像去噪 总被引:4,自引:1,他引:3
提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。 相似文献