一种便携式多体征参数监护系统的设计及实现

采用模块化设计的方法,设计并实现了一种便携式实用新型医疗健康监护系统。系统由人体生理参数采集电路、微控制电路和系统软件三部分组成,可对人体常见的体征参数进行采集、处理和显示。实验对比结果表明,监护系统能准确稳定地对人体体温、脉搏、呼吸、心电、血压、血氧等多个参数进行实时测量、保存和显示,并能通过蓝牙和Wi Fi进行无线传输。     

基于MLX90614的无线温度采集系统设计

在医疗设备研发制造等领域,为了实现人体体温附近范围内高精度的温度测量,设计了一种基于低功耗单片机MSP430、非接触式红外温度传感器MLX90614以及蓝牙传输技术的无线温度监控系统,采集发送模块以超低功耗单片机MSP430为控制核心,通过SMBus协议读取MLX90614所采集到的目标温度值,利用蓝牙透传模块将数据上传.MSP430单片机的使用极大地降低了系统功耗,MLX90614非接触测量方式满足了医疗设备研发污染隔离的特殊需求,具有较高的测量分辨率和精度,蓝牙透传模块的使用使得系统易于实现数字化、网络化和集散化管理.实验表明:该系统在32 ～42℃温度范围内,测量精度达±0.2℃,并实现了测量结果的无线传输,在医疗设备研制领域有广泛的应用前景.     

基于无线传输技术的人体脉搏采集分析系统

设计了一种人体脉搏无线检测系统,该系统实现了人体脉搏的采集,滤波,无线传输等功能.信号采集硬件以MSP430单片机为控制核心,采集脉搏数据经过滤波、A/D转换,通过无线传输模块传入计算机.上位机软件利用虚拟仪器技术编程,实现了实时数据的采集、存储和波形显示.通过计算机对脉搏信号进行特征提取、分析和初步健康诊断.系统拥有便携、低功耗、成本低的特点,既可用于脉搏信号研究也可用于临床和家庭保健中的脉搏检测.     

基于nRF401芯片的无线传输远程测温系统

介绍一种远程自动测温系统。在测量端使用24位高精度的模数转换器实现温度参数的模数转换,精度可达到0.5℃。将数字温度参数以无线的方式发射出去,在接收端应用远程可视化编程系统接收采集数据,并实时完成温度信号处理。系统对温度信号的采集及时准确,无线技术使温度信号传输方便;远端可视化控制系统使温度参数采集、过程监控更加直观。     

基于无线传感器网络的档案库温湿度监控系统

为了实时监控档案库房环境的温湿度参数,确保档案保存质量,系统以单片机STC89C52RC作为微处理器,采用芯片nRF24L01为无线传输模块,采集温湿度信号,设计了一种无线温湿度检测系统.系统硬件电路采用模块化结构,使得系统兼容性、扩展性、稳定性很好.经实验测试表明:系统温度测量精度达0.5℃,湿度测量精度达1％RH,在内无线传输距离达50米.设计的系统符合预期要求,可在博物馆、档案室、图书馆空间狭小不易布线的环境推广应用.     

无线传感器网络技术在医疗监护中的应用

提出了一种基于ZigBee无线通信协议的无线传感器网络技术的医疗监护系统解决方案,同时以测量人体血氧饱和度为例,详细介绍了该方案。本方案将测量到的人体血氧饱和度数据通过无线传感器网络传输到基站,基站对这些生理参数进一步处理,并以此评价人体健康状况。     

集线式水库大坝安全监测系统设计

针对水库大坝安全监测系统的智能化程度低、稳定性差、数据传输滞后、数据丢失等缺点,提出了一种集线式水库大坝安全监测系统设计。该系统的硬件部分采用LPC2368FBD和STC12C5410AD为主控制器,将渗压采集、水位采集、雨量采集、温度采集、电压采集、数据传输、数据处理、数据发布等功能集于一体。首先,通过有线或无线传输方式将监测数据传送至大坝端服务器;再通过公网或移动的APN专网将数据传送至省大坝中心数据库;最后通过后台处理对水库大坝的运行性态做出评价并将评价结果及时发送给相应的水行政主管部门,以便他们针对可能出现的灾情做提前预防。软件部分通过定时或实时发送采集命令,控制系统进行数据采集。将本系统应用于实际水库大坝安全监测中,结果表明:在测量精度、可靠性、稳定性、实时性等方面都满足了设计要求,其频率测量精度±1%,水位测量精度±0.25%,雨量测量精度±1.5%,温度测量精度±1%,电压测量精度±1%。     

木材干燥窑自动测试系统的研制

论述了木材干燥窑自动测试系统的硬件、软件设计.重点介绍了各个参数测量传感器的工作原理、提高被测参数测量精度的措施,以及测量过程中动态补偿的方法.通过实验验证,该系统运行稳定,测量精度高,数据采集实时可靠.测温精度为±0.1℃.平衡含水率和木材含水率精度为±1%.     

用于脑卒中病人康复训练的穿戴式无线生理参数检测系统设计

针对中风病人康复训练过程的监控需要,研制了一种基于无线传感网络技术的以脉搏血氧饱和度和呼吸参数为检测对象的穿戴式无线生理参数采集系统。结合脉搏血氧饱和度检测技术、呼吸参数检测技术以及无线传感网络技术的发展概况提出了以C8051F320为控制核心的无线生理参数采集系统的设计方案,详细介绍了无线生理参数采集系统的软、硬件设计,并对实验结果进行分析处理。实验结果表明:该生理参数检测系统可以完成脉搏血氧饱和度和呼吸参数的检测任务。     

基于ZigBee无线传输的倾角传感器网络

应用ZigBee传感器节点的硬件和软件以及上位机软件研制了一种无线倾角传感器网络系统.采用了二次温度补偿解决温度对测量精度的影响,并对无线网络的功耗进行了优化处理.实验表明:该系统的测量精度达到了±0.01°(倾角测量范围为±3 °),数据采集间隔为1次/s时,平均电流仅为0.21 mA,达到了高精度低功耗的设计要求.     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

Designing economic np control charts: A programmed simulation approach

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.     

The development of robot art

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     

Explanation and prediction: an architecture for default and abductive reasoning

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.     

Three Process Perspectives: Organizations, Teams, and People

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.     

基于复小波噪声方差显著修正的SAR图像去噪

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.