农产品储运监控系统设计与实现

针对冷链运输环节中农产品环境监测困难这一问题,基于无线传感器网络技术、4G技术和嵌入式技术,设计了农产品储运监控系统。采用温湿度传感器模块、气体浓度传感器模块,实现了车厢内温湿度、气体浓度的采集;以CC2430为核心搭建了无线传感器网络,实现了数据的无线传输。基于S5PC110微处理器和嵌入式Linux操作系统,构建了嵌入式网关。通过嵌入式数据库管理模块,完成了无线网络传感器节点的数据实时显示和存储,以及对设备工作状态进行控制。同时,利用嵌入式网关的4G模块,完成了数据的远程收发和设备工作状态的远程控制。测试表明,该系统具有功耗低、组网灵活、可扩展性强的优点,可以实现对农产品储运车厢内各种环境信息的实时监测,能够较好地满足农产品冷链运输的应用需求。     

基于GPRS的下水道气体远程监测系统设计

为了提高城市下水道气体监测的实时性和可靠性,设计了基于GPRS的下水道气体远程监测系统;该系统主要包括前端气体采集模块、GPRS数据无线传输模块、数据接收模块及监控中心;气体采集模块由气体传感器和数据采集单片机组成;单片机实时采集气体传感器中的数据,并将采集到的数据通过GPRS无线传输模块进行实时上传;数据接收模块把接收到的数据传送至监控中心服务器,由服务器对数据进行处理、显示、存储和统计等;通过对18个监测点的监测实验效果表明,该系统运行稳定可靠,能实现对下水道气体远程采集、无线传输和实时监测的目的。     

农产品冷链配送监测系统的设计与实现

针对农产品冷链配送环境难以得到有效保证这一问题,利用基于移动蜂窝通信的窄带物联网技术(NB-IoT)和无线传感器网络(WSN)技术,设计了农产品冷链配送监测系统。该系统利用传感器模块、继电器模块,实现了冷链配送车厢内环境信息的采集和设备的实时控制;以MSP430单片机和CC1101无线芯片为核心,搭建了WSN,实现了环境数据在终端节点和协调器节点的无线传输;利用基于移动蜂窝通信的NB-IoT,实现了本地环境数据的远程无线传输。基于浏览器/服务器(B/S)架构,设计了农产品冷链配送监测系统。通过该系统,完成了农产品冷链配送过程中环境数据的实时显示和存储,以及对相关设备工作状态的远程控制。测试结果表明,该系统虽然受到车厢内杂物和车厢本身对信号的影响,造成数据传输的丢包和时延,但仍能较好地满足农产品冷链配送的应用需求,实现了对农产品冷链配送车厢内各种环境信息的实时监测和设备的远程控制。     

基于STM32的实验室环境安全监控系统

为保证实验室人员的人身和财产安全,设计了实验室环境安全监控系统,系统由服务端、设备端、客户端构成。服务端可划分为前置服务器和后置服务器;设备端选取STM32F103ZET6作为核心处理器,通过ESP8266无线传输模块实现温湿度传感器、烟雾传感器、一氧化碳传感器数据上传;客户端采用Qt实现系统用户管理功能、实验室环境数...     

移动终端的设施农业物联网环境监控系统设计

通过使用物联网(IOT)传输协议—消息队列遥测传输(MQTT)协议,将前端硬件、服务器端及移动端连接在一起,完成对设施农业环境的远程实时监控.在系统中,前端硬件以STM32微处理器为核心,由传感器模块、设备控制模块、GPRS模块和电源模块组成,实现数据的采集和传输;服务器端有数据接收、存储、分析的能力,并担任MQTT消息协议中消息生产者和消息管理者的角色;移动终端软件则以Android操作系统为基础开发了应用软件,用户在装有Android系统的移动终端上安装该应用软件,即可查看实时环境情况,发送控制设备指令等.经过测试,整个系统运行稳定、使用简单、实时性高,用户能有效地对设施农业环境进行远程实时监控.     

基于无线传感网的温室花卉自适应调控系统

针对传统温室控制系统大多只是简单地采集环境参数如空气温湿度,并且缺乏长期评估和有效反馈机制的问题,文章提出了一种基于无线传感网的温室花卉自适应调控方法,并实现了一个综合传感、决策、执行反馈的软硬件系统。为此,系统中设计了基于Zigbee的传感器节点模块、传输网关和控制指令集。传感器节点模块可以灵活地布置并实时可靠的传输数据。中间件系统则通过控制指令集接收传感数据和发送反馈控制指令。上层应用管理软件可以实时查看花卉、温室和设备的实时状态以及各种参数。运行结果表明,本系统可以实时采集温室温湿度,并结合专家规则通过中间件系统对花卉生长环境进行有效的评估和精准的反馈调控,达到了在降低温室花卉培育成本的同时,也提高了高端花卉培育成功率的目的。     

基于物联网的观赏鱼智能喂养系统设计与实现

针对传统鱼缸观赏鱼喂养模式过程繁琐以及环境信息难以调控等已存在的问题,设计一个能对观赏鱼生长全过程进行实时监控的观赏鱼智能喂养系统,该系统由下位机前端硬件感知系统和上位机后台软件两个部分组成。前端硬件感知系统负责传感器数据采集、摄像头数据采集、硬件设备控制以及利用GPRS与上位机的数据通信。上位机可以对数据进行存储和有效的分析并且利用神经网络与深度学习算法对观赏鱼进行种类识别并做出相应反馈与决策。在实现远程监控的基础上进一步实现了鱼缸环境因子的精确测量与观赏鱼生命状态的预测。通过在多家水族公司的实际应用,证明了该系统在观赏鱼喂养方面的有效性和可靠性,具有推广应用价值。     

基于STM32的物联网嵌入式网关的设计

针对物联网在智能传感器控制中的广泛应用,采用嵌入式技术,利用现代高速发展的网络平台设计了服务于物联网智能采集系统的嵌入式网关。嵌入式网关的系统由STM32F嵌入式主设备、路由器、GPRS模块及无线协调设备组成,主设备系统采用μC/OS-II操作系统,通过百兆网口与路由器连接;通过串口与GPRS模块及无线协调设备连接,从而实现数据的实时显示功能、历史数据存储功能、网关控制参数设定及查询功能、Internet网远程访问与控制功能、GPRS网远程访问与控制功能。     

基于无人值守的电网环境智能监测系统设计

针对目前电网设备无法实时监测预警以及人力、能源浪费现象,设计了一种基于自供能、无线传输网络和多传感技术的无人值守智能监测系统。该系统包括自供电能源管理模块、微控制器模块、多传感器模块、无线通信模块以及上位机。自供电能源处理模块采集当前环境中的太阳能并将其转换为3.3 V稳定电压为系统供电。多传感器模块采集当前环境中的温度、振动及声音信息传给微控制器模块融合处理,通过无线传输模块将数据信息发送给上位机进行实时显示预警。实验表明,系统工作性能优异稳定,适用于电网设备长时间的可靠监测。     

基于无线传感网络的环境监控系统

为了实现对环境系统的动态远程监控,设计了一种基于Zigbee的无线传感网络监控系统.Zigbee无线数传终端模块通过内置的单片机系统,实现了不同传感器的接口协议,并对传感器数据进行了实时读取、编码与发送;系统中的协调器实现对数据包的接收、解码、验证并将正确的数据转发数据至服务器;无线传感网络中引入了ZStack协议,从而实现了对无线终端与协调器节点的动态增删;监控终端分为桌面与移动端,通过无线网络访问服务器中存储的数据,实现对环境系统的远程实时监控.     

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。