基于网络表的数据收集转发器的分析与设计

数据收集转发器是一种对表具进行连续、长时间、自动、实时监测,并进行分析、处理、存储、数据转发以及自动报警的中继设备。介绍了数据收集转发器的硬件结构,提出了数据收集转发器的设计方案,可以广泛应用于燃气表数据的远程无线集抄。     

基于MSP430F149的数据转发器设计

以MSP430F149单片机为核心,设计一种双串行通信的电能表自动抄收系统的转发器,给出转发器的硬件结构框架与软件设计方案。转发器通过三种通信方式实现主机与电表抄表器的数据通信。     

基于雾架构的工业物联网通信机制与算法研究

传统的云架构面临着网络负载过大、端到端延时长等问题。因此,利用基于雾架构的工业物联网通信机制与算法对传感数据进行采集处理,构建网络模型和能耗模型;选择期望传输能耗最小的节点作为转发器,通过雾服务器节点收集工业现场的传感数据;通过仿真实验将该通信机制与其他方法进行对比和评估。实验结果表明,该通信机制与算法可以有效收集工业现场的传感数据。能耗、第一死亡节点等指标比其他算法更具有优越性,为改善工业现场应用提供了新的解决思路。     

基于物联网的无线红外转发器的设计

设计一款集成多种空调品牌和型号的红外遥控指令并具有学习功能的无线红外转发器.红外转发器采用了意法半导体Cotex-M3内核的STM32F1OOC8处理器,使用一体化红外接收头HS1838进行红外解码,并通过433 MHz频率的无线网络进行命令和数据的双向传输.可用于基于物联网的智能住宅的远程控制系统.用户可通过网络发送指令控制家中的红外转发器,进而远程控制带红外接口家用电器.实验结果证明这是一种高效的物联网红外转发器应用方案.     

双模式胶囊内窥镜转发器的设计

为了通过蓝牙或Wi-Fi获取胶囊内窥镜图像,研究并设计了基于CC3000和BC41714的双模式胶囊内窥镜转发器。根据不同的模式,转发器使用STM32F103控制CC3000或BC41714转发接收到的胶囊内窥镜图像数据。使用提出的转发器,从胶囊内窥镜获取的图像可通过蓝牙传输给Android手机进行显示并保存,也可直接通过Wi-Fi将图片上传到工作站。实验结果表明,转发器能稳定地转发胶囊内窥镜的图像,并完成提出的相应功能,可以为胶囊内窥镜的远程诊断提供一种可行方案。     

新闻数据可视分析系统

文中展示了一个具有创新性的新闻可视分析系统——VASNRU.该系统有机地结合了新闻数据收集与可视分析,旨在帮助用户更好地分析与理解新闻数据.该系统首先根据用户想要查询的内容,利用搜索引擎自动地收集一定数量的新闻数据;在此基础上,自动地对收集到的数据进行预处理,以便进一步进行分析.为了帮助用户更好地分析与理解数据,采用一个可视分析工具(Mutual Ranker)对处理好的数据进行可视分析,采用VASNRU收集并分析了2个真实的新闻数据集,结果验证了其能够方便、高效地收集与分析新闻数据.     

程序并行化中数据收集代码自动生成算法研究

着重论述了串行程序并行化过程中的数据收集部分代码的自动生成。提出利用等价类的方法获取数据的最后写关系,并建立包括计算划分、循环迭代和数据最后写关系的不等式限制系统,最后利用FME消元法对不等式限制系统进行消元处理,最终实现数据收集代码的自动生成。     

Android应用模拟交互技术的研究

针对于行为分析的Android恶意代码检测技术均需要收集大量的运行数据,文中提出了一种基于用户模拟交互技术的数据收集方式。使用计算机及若干个Android设备,自动化完成有效分析数据的收集,减少了人工参与的程度。通过结合使用制定的Android应用程序的运行策略,包括环境差异策略、时间差异策略、事件差异策略,以及测试工具等,完成应用程序在Android设备上的自动安装、交互运行、数据收集以及自动卸载。验证实验表明,该用户模拟交互技术能有效收集应用程序的运行数据,是一种可行的应用方案。     

软件过程中的度量数据收集方法研究

度量数据收集在软件过程改善实践中起着重要作用,但是往往在研究中受到忽视。介绍了软件过程数据收集方法和技术的发展历程,提出了软件过程度量数据收集方法的评价准则,给出了一个软件过程度量数据自动收集的框架,并且列举了四种实现方法。     

自动气象站质量控制系统中覆盖软件的设计与实现

区域气象自动站收集降水数据的质量,直接决定着气象预警的漏警与虚假概率,但是仅依靠自动站间采集数据的时空相关性难以准确验证数据的有效性。通过天气雷达对降水滴谱的分析可以对自动站数据进行校验。但是,雷达站的系统异构性和地理环境的复杂性使其难以判定所覆盖的气象站,易产生错误校验。结合天气雷达的层体扫模式和雷达波束的遮挡模型,构建了雷达站与自动气象站点的覆盖匹配算法,基于该算法实现的自动站与雷达站匹配软件可有效的实现雷达站与自动站配对,从而为对自动站降水数据进行校验提供基础保障。     

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.