基于MSP430F149的血氧饱和度检测仪设计

血氧饱和度检测仪是一种可对动脉血氧饱和度进行实时检测的医学检测仪器。文章详细介绍了基于Beer-Lambert定律的非侵入式脉搏血氧检测系统的工作原理。以MSP430F149为核心,配以Nellcor DS-100A型脉搏血氧探头、LCD模块等,给出了数字脉搏血氧检测系统的设计方案,设计了血氧饱和度检测仪。该检测仪实现了血氧饱和度和脉率的实时检测功能。系统运用IIR和FIR数字滤波器抑制系统噪声信号干扰,提高了检测的的稳定性和可靠性。由于MSP430F149单片机超低功耗的特点,极大地降低了系统运行时的功耗。     

便携式血氧信号检测装置设计

实现动态环境下血氧饱和度的实时连续检测,研制了一种基于透射式检测原理的血氧饱和度监测装置.采用透射式光频转换器采集人体光电容积脉搏波,低功耗处理芯片MSP430为主控芯片,获取的脉搏波信号经过程序处理之后,通过蓝牙模块无线发送到终端设备.在动态环境下脉搏波信号存在多种干扰,利用了脉搏波信号的上下包络线信息,采用邻值代替法去除奇异点,低通滤波去除高频干扰,形态学滤波去除基线漂移和运动伪差干扰.该装置具有成本低、功耗低、易操作等特点,实验结果表明:所得到的血氧饱和度具有较好精度,能够动态实时地监测.     

基于MSP430F5529的简易风洞控制系统设计

基于MSP430F5529设计了一个简易风洞控制系统。选用超声波传感器检测乒乓球在简易风洞中的位置,微控制器MSP430F5529通过对乒乓球当前位置的分析判断控制直流电机的转速,从而完成对乒乓球升降高度的实时控制。     

脉搏血氧检测仪软件设计优化

为了实现基于蓝牙的脉搏血氧仪的设计,给出了基于MSP430FG4618单片机为核心控制器的脉搏血氧监测仪解决方案的整体设计.在阐述解决方案原理的基础之上结合单片机的具体特征,提出了软件方案的设计实现和优化,如数据采样的中断、无限长脉冲响应低通滤波器的算法优化设计、有限长脉冲响应低通滤波器的优化设计、计算血氧饱和度和脉搏的设计方案、直流电压的自我调节以及蓝牙通信的软件设计.     

微型四旋翼飞行器的系统设计

本文设计了一款微型四旋翼飞行器系统,包括姿态检测单元、处理器、电机驱动等单元。以低功耗MSP430F5529微处理器为系统控制器,陀螺仪ITG3205、加速度计ADXL345等作姿态检测,以2.4GHz频段的无线通信方式进行遥控。     

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.     

一种单片便携式脉搏血氧饱和度测量仪的研制

根据红外光谱法血氧饱和度测量原理,以MSP430为开发平台,设计了一种便携式无线脉搏血氧仪.设计中采用了一种新型的腕式血氧探头,使用户佩戴和测量更加方便;硬件设计上充分利用了单片机内部的功能模块,使外围元件个数减到最少,功耗降到最低;软件设计上实现了信号调制、信号处理、信息显示和无线通信等功能.实验样机的初步测量结果表...     

基于交直流分离的反射式血氧饱和度测量系统的设计

肝储备功能是评价肝脏正常生理活动的重要依据,动脉血氧饱和度是肝储备功能测量的重要中间变量,针对长时间连续无创血氧饱和度测量的要求,提出基于交直流分离的反射式血氧测量系统的设计方案。通过测量手指、耳尖等皮肤薄弱部位的反射式光电容积脉搏波,利用交直流信号分离处理技术,基于动脉血氧饱和度经验测量公式,实现长时间无创动脉血氧饱和度测量。交直流分离技术的使用能够有效的降低系统干扰和噪声的影响,优化血氧饱和度测量结果;经临床医疗对比实验检测,证明系统误差符合实际测量要求。     

基于GSM和LabVIEW的温室大棚远程监控系统

为了实现智慧农业,设计了基于GSM和LabVIEW的温室大棚远程监控系统,系统以MSP430F149为处理器,通过放大电路及滤波电路对土壤湿度传感器、土壤PH值等微弱信号进行放大、滤波,实现对可移动天窗、遮阳系统、保温、喷滴灌系统进行实时自动调节、检测,创造植物生长的最佳环境指标,同时将测试结果利用GSM模块传到农户手机上,并通过串口实时远程传输给LabVIEW上位机显示;系统运行稳定,可靠性好、扩展性好,人机界面良好,具有广泛的市场应用前景.     

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。     

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.