支持跨平台的实时人群运动仿真系统

实时人群运动仿真系统通过虚拟现实技术,可在计算机中交互式地显示人群在指定场景中的运动状况.通过对人群设置不同的全局运动路径,可以模拟人群的不同行为,例如人群的集会、疏散、逃生等情况.故该技术可应用于应急疏散演练以减少事故的伤害甚至能发现并解决建筑在设计时可能存在的安全隐患等.目前,常见的人群运动仿真系统往往只能在单一操作系统下执行.随着计算机硬件和移动设备的发展,跨平台的仿真甚至在移动设备上进行人群仿真成为新的需求.本文提出了跨平台的实时人群运动仿真系统的系统架构,通过解析并处理C3D文件实现了人体动作,并通过Mono Game平台实现了跨平台的实时人群运动仿真.     

建筑安防设备实时控制虚拟仿真系统研究

虚拟现实技术在建筑中的运用目前还只局限于单纯的场景再现,对于建筑内突发事件的模拟以及安防设备应对突发事件时的交互和响应的仿真模拟程度还远远不够.针对这种现状,建立了能动态生成建筑内安防设备模型且能实时控制模型的虚拟仿真系统,且在系统中模拟出各种突发事件协助反映设备及控制人员应对建筑内突发事件的能力,提出通过虚拟设备模型控制真实设备的虚拟与真实相结合的模式.     

虚拟现实技术在城市小区规划中的应用

以虚拟现实技术为核心，以河南大学新校区的三维景观虚拟现实漫游展示系统为例，着重阐述利用MultiGen creator建模来形成景物的三维数据库以及地形数据库，并通过MSVC调用OpenGVS API来进行实时场景控制最终生成虚拟现实产品的过程，提出了一套快速建立三维虚拟系统的技术和方法。     

基于Quest3D的虚拟中药药材展示系统研究与实现

随着计算机软硬件和虚拟现实技术的发展,运用虚拟现实技术辅助规划设计和展示已成为该领域的研究热点.本文介绍了一种基于虚拟现实软件实现的虚拟药材展示系统的设计方法,即利用三维建模软件3ds max进行三维实体及场景建模,采用虚拟交互平台Quest3D为场景驱动.本文以应用该方案实现的虚拟药材展示系统为例,重点介绍了系统架构和实现的技术流程,并对实现过程中的场景建模技术、交互设计中的图形化设计方法以及增强场景真实感方法做了深入的阐述.     

火炮虚拟样机技术研究

文章应用虚拟现实计算机理论,基于虚拟样机和实时场景技术,提出了火炮虚拟现实技术的研究方案,建立了高效的火炮虚拟现实系统。在该系统上通过和火炮仿真发生器的实时交互,可用于真实描述火炮操瞄、发射过程,感知火炮行军、火炮操瞄、火炮发射对炮手的影响以及评估火炮作战效能。     

基于CREATOR与VEGA技术的虚拟场景优化技术及研究

随着虚拟现实技术的广泛应用,虚拟场景的真实感与交互的实时性已成为急待解决的一对矛盾.从提高桌面虚拟现实系统实时交互性入手,对基于软件的虚拟场景优化技术进行重点研究,使用一套基于CREATOR的技术处理流程实现了一次实验性场景优化过程,并在此基础上对过程中通过VEGA测试得到的指标参数进行详细分析,最终阐明影响场景优化效果的因素以及各因素之间的关系,指出了有效提高优化效率的方法及其原理,对于虚拟系统实时交互性的提高具有普遍意义.     

建筑安防设备实时控制虚拟仿真系统研究

虚拟现实技术在建筑中的运用目前还只局限于单纯的场景再现,对于建筑内突发事件的模拟以及安防设备应对突发事件时的交互和响应的仿真模拟程度还远远不够。针对这种现状,建立了能动态生成建筑内安防设备模型且能实时控制模型的虚拟仿真系统,且在系统中模拟出各种突发事件协助反映设备及控制人员应对建筑内突发事件的能力．提出通过虚拟设备模型控制真实设备的虚拟与真实相结合的模式。     

基于电力载波技术的建筑设备物联网节点研制

为实现建筑物内用电设备的实时信息获取、监控及节能优化等目的,提出了以电力线载波技术和Internet技术为核心的建筑设备物联网系统架构,研制了该系统关键部件——物联节点.实现了以太网通信和电力线载波通信间协议转换、数据转发等功能.其硬件主要采用LPC1768 ARM7作为主控芯片结合DP83843以太网PHY芯片和MI200E电力线载波芯片完成,结合相应软件实现了建筑用电设备与Internet技术的完美融合.该物联节点的实现使得构建建筑设备物联网这一复杂网络成为可能.     

人群疏散虚拟现实模拟系统——Guarder

人群疏散的虚拟现实模拟就是利用虚拟现实技术,在计算机生成空间中建立公共设施和人群的三维模型,设定各种可能发生的安全危机和相应的疏散预案,模拟并三维地展示人群疏散场景;通过对模拟结果进行统计分析,可以验证人群疏散应急预案的合理性和有效性.介绍了人群疏散模拟虚拟现实系统Guarder设计的核心思想,提出了技术框架,详细阐述了其中的复杂环境语义表示、群体运动仿真等关键技术,并给出了应用实例,最后列举了几个前沿研究问题.     

基于Arduino的虚拟现实交互系统实验案例设计

综合运用嵌入式、三维建模、虚拟现实等技术,提出一个软硬件结合的虚拟现实交互系统典型案例,实现虚拟场景与现实环境的实时交互控制。通过3DMAX和Unity3D软件设计虚拟现实交互场景,采用Arduino核心板搭建场景的控制模块,运用光敏电阻和湿度传感器实时获取环境信息并注入虚拟场景中,实现虚拟现实交互系统。     

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。