保鲜车状态远程监控系统设计

保鲜车状态远程监控系统由车载监测终端和远程监控终端两部分组成。车载监测终端实时测量车厢内的温湿度和保鲜车的位置,通过GPRS模块将测量信息发送到MQTT服务器;远程监控终端采用嵌入式Linux系统,通过网卡模块从MQTT服务器获取测量信息,并通过网卡使用HTTP协议调用腾讯地图接口,解码地图数据,将车辆在地图上的实时位置和温湿度数据呈现在远程监控端,便于监控,并可通过触摸屏更改显示地图的范围大小以及温湿度阈值等,进行超限报警及相应控制。该系统为远程数据监控提供了一种便携、可靠、显示直观、易于实现的解决方案。     

铁路大型养路车辆在线监控系统的设计与实现

车辆监控系统是集电子技术、通信技术和数据库技术在交通管理领域广泛应用而产生的一个崭新的领域;文中设计利用现有的GPRS/GPS/GIS技术,针对铁路大型养路车设计出一个适用于08—32机型养路车的在线监控系统,该监控系统是由下位机的车载终端系统、通讯服务器系统和上位机的监控终端系统三大部分组成,下位机负责数据采集;上位机负责数据显示、数据分析和数据处理;服务器负责连接上下终端的数据传送。文中将具体阐述各个子系统的设计与实现,其结果达到了预期的设计效果。     

基于BBB平台的车载定位监控系统设计

车载定位监控系统共有两个主要模块:车载端和监控终端.车载端由BBB控制板和SIM908模块构成,工作过程为BBB主控板开启SIM908 GPS功能,同远程监控终端建立数据链接,获取GPS地理位置数据,然后将所获得的数据解析打包,并通过GPRS网络将数据发送到远程监控终端.远程监控终端由X86 PC机构成,首先监控端建立基于外网IP地址的服务器,然后监听连接请求,获得请求后建立通信连接、接收数据,并对数据进行解析,最后将车辆定位信息在Google和Baidu在线地图上进行标记显示.     

采用GPS和GPRS的移动目标监控导航系统设计

系统以STC12C5A60S2单片机为控制核心,使用DP310设计的GPS模块接收卫星定位信息,通过由M23G制作的GPRS模块连接GPRS/GSM网络和Internet,将移动目标的定位信息发送给手机或远程数据库服务器;连接Internet的监控终端可登录数据库服务器,以查询监控移动目标;数据库服务器也可为移动目标导航;实验结果显示,系统具有定位精确,跟踪及时,通信资费便宜,操作简单,人机交互界面友好的特点。     

基于GPS和GPRS车载导航定位系统的实现

车载终端通过GPS外接天线接收GPS信号,由串口将此信息传送给主机,主机解算出车载当前的经度、纬度、速度、时间、状态等信息,一方面为电子地图提供地理位置信息,将车载的位置在终端实时显示出来;另一方面将信息打包通过GPRS发送给监控中心,提供监控所需的原始数据。文中介绍了车载终端的组成,重点阐述了车载的定位及显示技术。     

基于GPS的铁路养路车监控系统的总体研究

车辆监控系统是集电子技术、通信技术和数据库技术在交通管理领域广泛应用而产生的一个崭新的领域。本设计利用现有的GPS技术,针对铁路大型养路车设计出养路车在线监控系统。它从铁路提速的实际情况出发,综合考虑了人、车、路等方面的因素,为铁路维修质量的提高和工作人员的操作方便提出了一系列解决方案,大大完善了大型养路车数据处理的功能,增强了人机的交互能力。本文首先将GPS技术结合运用到系统设计中,并且提出了一个基于GPS的养路车监控系统的设计方案。该监控系统是由下位机的车载终端系统、通讯服务器系统和上位机的监控终端系统三大部分组成,下位机负责数据采集;上位机负责数据显示、数据分析和数据处理;服务器负责连接上下终端的数据传送。     

基于GPRS通信技术的智能阀门远程监控系统

主要研究基于GPRS通信技术的智能阀门远程监控系统的研发。系统用于阀门流量监测,控制终端通过流量计可以精确采集阀门注水信息,通过GPRS将数据准确、快速地传送给上位机。上位机可以将数据以图表形式直观地显示出来,并将数据储存在相应的数据库中。结合相关系统设计理论知识,给出了阀门远程监控系统设计的详细步骤和具体内容。     

基于GPS和GPRS车载导航定位系统的实现

车载终端通过GPS外接天线接收GPS信号，由串口将此信息传送给主机，主机解算出车载当前的经度、纬度、建度、时间、状态等信息，一方面为电子地图提供地理位置信息，将车载的位置在终端实时显示出来：另一方面将信息打包通过GPRS发送给监控中心，提供监控所需的原始数据。文中介绍了车载终端的组成，重点阐述了车载的定位及显示技术。     

车载自动售货机系统的设计与研究

随着售货机管理经营技术手段的不断完善,开发出基于车载移动无线自动售货机是当前人们现实需求以及技术发展的需要.该系统结合GPRS、GPS、GIS等技术,设计并开发了安全有效的传输协议.实现了车载终端与远程监控中心的无线通信.在监控端实时显示当前各个售货机终端的交易信息、位置以及远程控制车载终端.经过实验测试,该系统能够准确、快速的完成指定功能.     

基于GPS/GPRS的车载定位系统设计

介绍了一种基于GPS和GPRS的车载定位终端系统设计.利用GPS卫星数据接收器接收车辆所处的位置信息,通过单片机对车辆位置的有效信息进行存储和控制,当车载终端接收到控制中心的指令后,通过GPRS网络传输车辆的位置信息.详细讨论了车载终端的硬件电路设计,包括控制模块、GPS卫星定位模块和GPRS无线传输模块等.实验证明,该系统性能稳定,通信效率高,功耗低,适用于车载定位监控领域.     

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.