基于Android的脑电信号无线采集与分析系统设计

提出一种基于Android平台的脑电无线采集与警觉度监测终端的设计。采用Wi-Fi作为无线通信方案,以Android手机作为上位机,在手机上设计应用程序,通过手机应用程序可以方便地实现对采集设备的参数设置、无线连接、数据接收、波形显示、数据分析和文件存储。Android手机端通过Wi-Fi与下位机建立通信,实时接收Wi-Fi模块发送的脑电数据,绘成脑电图,并能通过手机端向下位机发送控制命令,再将基于极限学习机的脑电信号分类算法通过Java编码移植到手机内部,分析脑电信号所携带的警觉度信息。立足便携式脑电信号无线采集系统,在系统中加入基于Android系统的传输控制方法,并植入训练速度快、分类效果好的算法程序,为便携式脑电信号采集提供了一个新方案。     

一种嵌入式脑电数据采集系统设计

以Kintex-7系列FPGA为控制核心，通过三段式有限状态机控制方式对64通道脑电信号进行数据采集，并通过千兆以太网将脑电信号传输至电脑。仿真和实测结果表明，所设计的嵌入式脑电采集系统能够实现稳定可靠的脑电信号采集，且经过实验验证，所采集的脑电信号符合要求，为便携式脑电信号采集系统设计提供了一种参考方案。     

突发通信中ARM与DSP同步通信接口研究

针对流星突发通信中实时高速数据传输的系统需求,采用ARM核芯片AT91RM9200作为核心微控制器.TMS320C6713B作为数字信号处理器,提出了基于ARM与DSP之间同步串行通信接口的系统实现方案,并给出了系统的硬件原理图、控制方法及基于Linux的主要硬件接口驱动程序设计.硬件测试结果表明,该系统通过中断方式可以实时高速的接收由DSP发送到ARM的数据,实现流星余迹通信的实时信号处理和数据传输.     

基于脑机接口的控制器

为实现大脑与设备的通讯,研究基于脑机接口的控制器．本文研究脑电信号（EEG）的特征提取,实验通过E．Prime心理学软件结合Neuroscan公司生产的64导脑电采集设备获取脑电原始信号,利用小波算法对原始脑电信号进行分析,提取感兴趣的频段小波系数作为特征;分析脑电信号的功率谱,基于Fisher准则设计分类器．本文在研究脑机接口（Brine．ComputerInterface,BCI）的基础上通过想象实现了对运动的控制．以轮椅为实际控制对象,仅仅通过两个电极采集脑电信号,设计制作了控制器,理论验证实验成功的通过想象控制轮椅的四个方向的运动．本文最后还探讨了脑机接口的应用前景．     

基于模拟前端ADS1299的脑电信号采集系统

设计了一套脑电信号采集系统,能够便捷地采集人体脑电信号,具有体积小、精度高、简单易用的特点.系统包括硬件和软件两大部分,硬件部分主要由最新的24位模拟前端ADS1299和AVR单片机构成.系统能够采集8通道的脑电数据,通过USB转串口模块上传数据至上位机.软件部分使用Java编程实时显示与存储采集到的脑电信号,随后通过Matlab对采集到的脑电信号进行后续分析.实验结果显示:本系统能够精确显示出眼电波形,当被试者闭眼时,枕叶电极的α波段波形尤为明显.     

基于ARM7微处理器的风光互补发电系统集中监控装置的研发

基于ARM7处理器LPC2292,开发了一块可以对风光互补发电系统进行协调控制的集中控制器,该控制器可以通过RS485接口以及DI、DO通道和风光互补发电系统各设备进行数据交互,该设备还具有显示功能,并预留了支持Modbus协议的RS-485接口供上位机读取数据和设置参数.     

基于CVI与Matlab相结合的BCI在线应用系统

结合CVI与Matlab,设计了一个脑机接口在线应用控制系统。首先,在CVI中通过TCP/IP实时接收脑电信号,通过触发回调函数对接收到的数据进行实时更新;其次,通过软件接口启用Matlab,将更新后的数据送入Matlab,在Matlab中对数据进行预处理、特征提取及分类;最后,在CⅥ中通过软件接口获取Matlab中识别出的类别号,并实现对虚拟车在线实时控制。系统采用多线程技术,充分发挥了软件优势互补的特点,可推动BCI的在线应用。     

基于DSP和ARM的便携式脑电信号处理系统的实现

为使脑一机接口技术(brain-computer interface,BCI)面向实用化、产品化,建立便携式的处理平台成为重要研究问题;系统采用现场可编程门阵列(FPGA)控制VGA显示器,设计了多功能视觉诱发刺激器,实时在线产生多种组合模式的刺激信号,诱发稳态视觉诱发电位;信号采集后放入到数字信号处理器(DSP)中,经过FIR滤波和FFT算法的处理后,得到辨识度较高的视觉诱发电位信号,并由无线将数据发送给STM32处理器,在LCD触屏上实时显示;实验结果表明系统实时采集、处理、显示脑电信号,相对于目前的BCI系统实现了多平台的便携式。     

基于无线传感器技术的人机接口系统设计

在综合研究脑电和眼电信号采集理论和方法的基础上,研制出一种基于无线传感器技术的新型多通道人机接口系统,包括无线传感器部分、信号处理和控制电路部分.该系统实时采集受试者垂直眼电和水平眼电,将其数字化,通过短距离无线技术传送给主机,主机信号处理系统根据眼电幅值判断受试者眼球转动方向,由此控制遥控汽车做相应的移动.实验结果表...     

机载飞控1553B总线转以太网总线设计

为使某型飞机上1553B总线数据在进行检查核准时,能够快速校准机上当前的飞控参数,需要设计一种1553B总线转以太网总线设备——数字飞控转换器.其可实现对飞控计算机输出的1553B总线数据实时接收解码、总线转换与采集显示.通过FPGA板卡设计,将多路1553B总线数据汇聚,形成一路UDP标准以太网总线输出的网络数据包,PC上位机检查软件通过以太网总线实时接收数据进行记录、监控.通过系统联试证明,所设计的方案合理可行,使用简单,具有一定的实用性.     

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。     

煤矿井下安全监控分站的设计及其仿真实现

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.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.