nRF51822蓝牙4.0的温度墒情测量仪设计

温度和土壤墒情在农业生产、气象观测中具有重要的指导作用.随着蓝牙技术的发展和蓝牙4.0规范标准的提出,使得蓝牙4.0在温度测量和土壤墒情测量中的应用成为可能.本文设计了一种基于nRF51822芯片的温度墒情测量仪,该设备将传感器数据采集后通过蓝牙4.0技术进行通信,实现了一种高性能、低功耗的无线便携式温度墒情测量仪器.     

蓝牙4.0技术搭载便携式设备新产品强势逆袭

正蓝牙特别兴趣小组Bluetooth SIG在2011年时就已经正式发布了新的标准蓝牙4.0技术,但是英雄末路、生不逢时,由于当时硬件条件的限制,蓝牙4.0空有一个概念,只是一种在实验室条件下才能应用的不完美的技术,其独特的优势并未被很好地开发和应用。事情的转机往往非常偶然,是的,没错,导火索又是苹果。2013年6月,苹果公司在其新品发布会上低调地披露了基于蓝牙4.0的无线通信技术iBeacons,这项技术较完美地利用了蓝牙4.0中的低功耗设计BLE(Bluetooth Low Energy),实现了一定程度上的更低功耗、更高速率、更远距离的位置定位及信息传输功能。由此,各大厂商的眼光开始聚焦在了蓝牙4.0技术。什么是蓝牙4.0?     

基于PTT的连续无创血压测量系统的设计

针对传统袖带血压测量的不连续性和不舒适性,设计并实现了一种基于脉搏波传播时间(Pulse Transmit Time,PTT)的连续无创测量血压系统。该系统以STM32嵌入式单元为核心,集心电(Electrocardiograph,ECG)、光电容积脉搏波(Photoplenthysmogram,PPG)采集模块和蓝牙于一体,以心电电极夹和指套取代了充气式袖带,可进行连续无创血压测量,并实现蓝牙无线数据传输,装置小巧,操作简单。     

基于蓝牙4.0的防丢系统的研究与设计

随着社会的发展,人们对防丢产品的需求日益提升;随着各大手机厂商对蓝牙4.0标准在软硬件上的支持,基于该标准的应用程序如雨后春笋般出现在了用户面前。本文设计和实现了一款基于蓝牙4.0模块的电子防丢器,该防丢器由母机和子机构成,子机为内置蓝牙4.0模块的防丢物件,母机为支持蓝牙4.0的Android智能手机,母机安装本文设计的防丢应用,并基于对子机信号强度的监测来执行监控逻辑。该系统子机采用集成芯片制作,母机只需要安装防丢程序即可,具有低成本,易操作的优点。     

基于蓝牙技术的便携式双向防丢器设计

随着蓝牙通信技术的飞速发展,蓝牙技术呈现井喷式发展态势,利用蓝牙技术实现防丢功能已经比较成熟。蓝牙4.0版本,可以实现远距离传输,而不仅局限于音频数据,可承载丰富的信息量,并且还可以自动感应信号、软件设置等多项人性化设计。目前市场上流行的防丢器往往是单向防丢,面对用户的双向防丢需求,设计了一套基于蓝牙4.0技术的双向查找防丢器,该设计克服了传统的单一功能,实现了手机和防丢器双向查找的功能。     

蓝牙通信在数字γ谱仪中的应用

该文从现场核辐射测量实际需求出发,设计了基于FPGA控制的蓝牙传输系统,并将其用于便携式数字γ谱仪的谱数据传输.文中主要从蓝牙硬件电路设计、基于FPGA的蓝牙传输控制模块设计、UART数据收发模块设计、蓝牙参数模块设计,以及在核辐射测量中的应用等几个方面进行了介绍.采用蓝牙通信、远距离控制操作更加方便,更有利于减少核辐射对人员的伤害.     

可穿戴式血压监测设备的设计与实现

高血压患者需要经常测量血压,而使用水银血压计需要专业人员,电子血压计功能单一且不方便携带,针对上述问题,本文提出了一种可穿戴式测量血压的手环,该设备基于PPG信号测量血压的方法并结合了红外测温技术,实现了测量血压和温度的功能,结合蓝牙通信功能,实现与手机端通信,为手机端处理数据提供了基础。     

基于蓝牙4.0的课堂签到系统设计与开发

针对校园环境下课堂签到耗时耗力的现状,设计并实现了一种方便、快捷且实现成本低的课堂签到系统。系统利用基于蓝牙4.0的信标设备使人物、事件、时间和地点之间相互联系,从而在课程指定时间和地点实现主动签到。系统采用B/S模式+C/S模式。对基于蓝牙4.0的室内定位技术进行研究,提出了在实际应用中易于实现并且满足定位精度需求的室内定位方法。实验结果表明,基于蓝牙4.0的课堂签到系统能够快速准确地完成主动签到过程,效率高、易于管理,系统可扩展性强。     

富勒推出首款蓝牙4.0鼠标

在Windows 8内建蓝牙4.0驱动程式后,蓝牙4.0也将会是IT周边产品的必争之地。作为业界领先品牌,富勒率先推出了一款BL702蓝牙无线鼠标,它是首款支持蓝牙4.0的无线鼠标,采用了G势力节能技术,搭载高精准IR光学寻迹引擎,可以长时间续航,确保使用时无须频繁的更换电池。而且IR引     

基于ARM的便携式血压监测装置的设计

设计了一种基于ARM和蓝牙的新型便携式血压无线监护仪。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。