基于浏览器的二三维一体标图技术研究与实现

为了实现在Web环境下进行二三维标图的需求,在研究了基于HTML5新特性的二三维图形绘制技术后,提出了一种面向浏览器的二三维一体标图应用的实现方案。基于MVC架构模式,使用HTML5的Canvas特性作为标图应用二维视图呈现,以开源三维GIS引擎Cesium作为辅助手段实现标图应用中三维场景渲染。以事件驱动方式实现标绘过程中图形的更改处理。后台通过REST式服务接口提供服务器端数据访问。     

基于激光雷达与单目相机融合的人体多目标室内定位系统

针对室内场景下无源人体目标无法准确定位的问题,提出了一种基于激光雷达与单目相机融合的人体多目标室内定位系统。使用多个低成本固态激光雷达在不同位置采集点云,拼接出整个场景的点云;结合视觉传感器捕获人脸目标,通过预先标定的内外参数将点云和图像实现映射,计算出人体的空间坐标。在室内场景(5.4 m×1.5 m)和室外场景(5.0 m×5.0 m)下进行验证实验,结果表明基于激光雷达与单目相机融合的室内定位系统能实时定位多个人体目标,平均定位误差约1.0 cm。     

WiFi探针的室内人员定位分析及应用研究

本文设计了一种基于WiFi探针的高精度、低成本、适用性强的新型室内人员定位系统。该系统在WiFi探针和室内定位技术的基础上,首先通过WiFi探针采集目标用户手机的MAC地址、RSSI数据,经过定位算法实时分析处理得出室内各区域的人员数据;其次,通过坐标转换和可视化技术展示人流动态,实现对室内人员动向的实时监测。基于WiFi探针的室内人员定位系统可应用于楼宇智能控制、消防疏散救援、商场客流分析、人流监测及溯源等领域。     

基于GeoFusion的三维地形和目标模型调度显示研究

针对大型场景的实时绘制问题,提出了一种基于GeoFusion的三维可视化技术.首先分析了GeoFusion三维视景平台的基本情况及对用户应用程序的支持,详细阐述了三维地形数据的坐标转换、格式转换和生产制作处理流程,结合GeoMatrix给出了地形调度显示方法,建立了DSM三维目标模型,提出了三维目标模型的调度算法.开发了仿真系统,并通过实例表明了所提地形和目标模型创建及调度显示算法能够实现实时调度和场景的实时显示,并保证了场景的真实感.     

二三维联动战场可视化系统的研究与实现

采用动态分页调度算法结合LOD技术实现了海量三维地形数据的加载与显示,研究三维军标绘制技术,提出了一种基于可视范围动态计算投影区域的方法,解决了三维线、面标号纹理模糊不清问题。采用MVC设计模式搭建二三维联动战场可视化系统框架,实现了二三维在视域范围、态势标号、地理信息查询之间的联动。     

基于RSSI实时精确定位系统设计与实现

为实现室内实时高精确定位,设计了基于RSSI的实时精确定位系统.首先基于RSSI测距原理,建立强度与距离数学模型把强度转化为距离,然后采用改进加权质心算法来进行定位,并把定位误差作为目标函数,最后运用简化粒子群优化算法对目标函数进行全局最优值搜索,采用C/S网络架构和多线程技术实现了实时同步获取RSSI值,采用GUI设计了定位系统界面,实现了定位结果实时动态显示.测试结果表明:系统实现了室内实时高精确定位.     

全源矿井定位:一种智能煤矿位置服务新范式

矿山动目标定位系统为煤矿智能化建设提供基于位置的服务。而传统的矿井定位系统中定位信标与定位标签之间大多采用单一或组合通信技术,结构不灵活,覆盖范围受限,鲁棒性不高,定位精度有限;使用单一或组合测距技术,无法根据使用场景的不同自适应选择最优测距技术;位置求解算法固定,无法根据使用场景的不同和信号变化自适应选择最优求解算法。提出了全源矿井定位新范式,可根据定位环境和目标承载平台的变化,从所有可用定位信号测量设备中动态选择满足当前需求的最优设备组合,自适应地从可用的测距算法、位置解算算法、结果优化算法中选择最优的算法组合,计算出目标节点的最优位置。给出了全源矿井定位系统架构,探讨了矿井中可用的定位信号测量设备和可用于定位的测量属性值类型,对比了单一矿井定位与全源矿井定位在定位服务器方面的功能差异。研究了全源矿井定位中的3项关键技术:统一定位框架技术,旨在解决全源定位的模块化、组合式、可扩充需求;全源定位信息融合技术,对测量属性值进行有机组织,达到提高定位精度的目的;通信定位一体化技术,通过无线通信网络本身所具有的定位能力,简化全源矿井定位系统的设计并提高定位精度。提出了基于“端-边-云”的全源矿井定位系统实施架构,以便与煤矿智能化的主流建设模式相适应,大幅降低实施难度和系统成本。     

智能井盖锁云端监测管理系统设计与实现

目前,市场上存在多种类型的防盗井盖,但设计大同小异,均是采取加装定位装置进行简易位置跟踪,不能实时监测井盖撬动、移位等异常状态,属于被动防护措施,井盖丢失现象无法杜绝。基于SSM框架和B/S架构,接入百度地图API,采用数据库、云服务器等技术设计了功能井智能锁管理Web端系统。根据内置ID和3D地图全方位监控井盖状态,并在Web端动态显示。结合最新的NB-IoT网络优势对井盖盗窃等异常情况实时报警。该系统还可实现智能锁授权接入、工作信息统计、数据可视化分析等功能。     

基于HTML5的生产装置实时监测可视化

提出一种基于HTML5的生产装置实时监测Web可视化方法。采用基于事件的自触发机制和WebSocket通信协议使服务器端主动传输数据,利用Canvas技术实现无浏览器插件式的页面动态可视化显示。基于ASP?NET平台开发生产装置实时监测Web可视化系统,给出系统架构和实现方法。实际应用结果表明,提出的服务器端自触发机制和WebSocket通信协议有效降低了服务器运行压力和网络吞吐量,提高了系统通信效率;开发的生产装置实时监测Web可视化系统无需安装浏览器插件,数据可视化效果良好。     

基于Web的实时远程DSP实验系统

实时远程实验系统的研究是现代远程教育研究中的一项重要内容。基于Web的实时远程实验系统采用B/S的结构,远程控制真实的实验仪器和设备,并对实验数据进行采集、传输。文中详细描述了构建一个基于Web的实时远程的数字信号处理器(DSP)实验系统中的关键技术和开发过程。该系统结合现代网络技术和数字信号处理器技术,采用多用户分时调试的机制,设计并实现了专用的实验硬件系统和软件系统,提出了构建远程实验系统的标准化框架和实现方法。     

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.