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1.
基于虚拟现实的反应堆退役模拟研究   总被引:4,自引:0,他引:4       下载免费PDF全文
反应堆退役工程是庞大的系统工程,需要进行退役作业的优化设计和技术评估。应用虚拟现实技术可以生成三维的虚拟堆环境,进行虚拟退役操作,从而为退役工程提供分析工具,为实施方案的确定、关键技术难点分析、退役数据信息管理和培训等提供依据和使用平台。该研究在分析退役工程有关需求的基础上,设计了基于虚拟现实的反应堆退役模拟系统,并针对其中场景构造、虚拟拆除、虚拟去污、虚拟剂量显示和虚拟作业等关键技术进行了讨论。在各项研究的基础上,针对具体应用,初步实现了应用系统。  相似文献   

2.
多风格融合的复杂森林场景自适应可视化   总被引:1,自引:0,他引:1       下载免费PDF全文
为了保证森林场景可视化时的真实感,同时保持动态森林场景生成时间的恒定性,本文提出了一种多风格融合的复杂森林场景自适应可视化方法。该方法利用基于视距的模型分布函数来控制树木模型的分布比例,从而建立多风格融合的森林可视化模型;在此基础上,根据复杂森林场景中树木生长模型的计算时间、三维树木绘制时间的估算结果,以及树木的视觉重要性,确定生成森林场景的最佳方案。该方法能够使复杂动态森林场景的生成时间保持较好的稳定性,并且在可视化过程中根据仿真效果动态调整绘制策略。为了验证该方法的有效性和实用性,在动态生长的森林仿真场景中对本文的方法进行了实验和应用。应用结果表明,多风格融合的森林场景自适应可视化方法能在保证森林场景可视化真实感的基础上,有效地提升复杂森林场景的绘制速度,使森林场景的快速漫游具有更好的稳定性和流畅性。  相似文献   

3.
Turbulent flows are multi‐scale with vortices spanning a wide range of scales continuously. Due to such complexities, turbulence scales are particularly difficult to analyse and visualize. In this work, we present a novel and efficient optimization‐based method for continuous‐scale turbulence structure visualization with scale decomposition directly in the Kolmogorov energy spectrum. To achieve this, we first derive a new analytical objective function based on integration approximation. Using this new formulation, we can significantly improve the efficiency of the underlying optimization process and obtain the desired filter in the Kolmogorov energy spectrum for scale decomposition. More importantly, such a decomposition allows a ‘continuous‐scale visualization’ that enables us to efficiently explore the decomposed turbulence scales and further analyse the turbulence structures in a continuous manner. With our approach, we can present scale visualizations of direct numerical simulation data sets continuously over the scale domain for both isotropic and boundary layer turbulent flows. Compared with previous works on multi‐scale turbulence analysis and visualization, our method is highly flexible and efficient in generating scale decomposition and visualization results. The application of the proposed technique to both isotropic and boundary layer turbulence data sets verifies the capability of our technique to produce desirable scale visualization results.  相似文献   

4.
WebGL(Web Graphical Library)让浏览器在无需安装插件的情况下即可渲染出3D图形,而封装了WebGL低级别API的three.js更是为3D图形的高效创建提供了可能.针对传统方法的磁盘阵列可视化不够直观以及交互功能单一的问题,本文提出了基于three.js的磁盘阵列三维(3D)可视化的框架,从仿真建模和交互两方面阐述了3D磁盘阵列的设计思路,并给出了相应的实现过程.相对于传统方法,提出的3D可视化框架能够创建真实的三维场景,给用户带来流畅丰富的视觉以及交互体验.  相似文献   

5.
锥束CT检测成像仿真系统的研究与实现   总被引:1,自引:0,他引:1  
设计并实现一个用于CT专业教学和科研的锥束CT检测成像仿真系统.该仿真系统能够模拟对CT设备的控制,生成正投影数据,重建被测物体,并能对重建结果进行三维显示.该系统包括如下关键技术:按真实比例对CT设备建模,实现了锥束CT工作过程的可视化;用场景图方法组织CT场景,简化了场景图形的管理方式;采用GPU加速CT正投影、图像重建和体绘制算法,在一定程度上解决了锥束CT大数据量快速计算问题.实验结果表明,该系统具有较快的运行速度,可满足用户交互操作的需要.  相似文献   

6.
Visualizing communication logs, like NetFlow records, is extremely useful for numerous tasks that need to analyze network traffic traces, like network planning, performance monitoring, and troubleshooting. Communication logs, however, can be massive, which necessitates designing effective visualization techniques for large data sets. To address this problem, we introduce a novel network traffic visualization scheme based on the key ideas of (1) exploiting frequent itemset mining (FIM) to visualize a succinct set of interesting traffic patterns extracted from large traces of communication logs; and (2) visualizing extracted patterns as hypergraphs that clearly display multi-attribute associations. We demonstrate case studies that support the utility of our visualization scheme and show that it enables the visualization of substantially larger data sets than existing network traffic visualization schemes based on parallel-coordinate plots or graphs. For example, we show that our scheme can easily visualize the patterns of more than 41 million NetFlow records. Previous research has explored using parallel-coordinate plots for visualizing network traffic flows. However, such plots do not scale to data sets with thousands of even millions of flows.  相似文献   

7.
GIS数据融合的虚拟现实系统探讨   总被引:2,自引:0,他引:2  
陈瑜  古钟璧  周新志  杨真 《计算机仿真》2006,23(4):216-219,286
针对现有三维GIS系统以及虚拟现实系统存在的问题,基于可动态更新GIS数据开发了具备三维场景漫游、外部数据库查询和部分空间分析功能的虚拟现实系统。该文首先介绍了地理信息系统和虚拟现实的现状及其融合发展的背景,然后描述了在Visual VC++.NET开发环境及OpenGL函数库的基础上,利用Terra Vista、MuhiGen Creator及Vega等仿真建模、实时渲染工具建造系统的过程,并以“数字都江堰演示系统”的建设证实了其实用效果。  相似文献   

8.
Knowledge graph, also known as scienti c knowledge graph, can reveal the dynamic development rules in complex knowledge elds. How to clearly present the internal structure of knowledge graph is particularly important, however, the current visualization research based on knowledge graph is rare. In this paper, varieties of data related to education are mined from massive web data, and are fused together. Then knowledge graph which is centered on educational events is constructed utilizing extracted named entities and entity relations. We construct a visual analysis platform for education knowledge graph, EduVis, which can support users to do associated analysis of education, and enable users to obtain the public opinions. In EduVis, we design and implement a) a word cloud treemap to provide an overview of education knowledge graph, b) a layout of events relation network graph based on topological structure and timeline to explore in details, c) a click tracking path to record the history of users'' clicks and help users to backtrack. The case studies show that the aforementioned visual analysis methods for our knowledge graph can meet users'' demands for data analysis tasks.  相似文献   

9.
数据维度相关性分析一直是数据分析领域的研究重点。传统的可视化方法可通过图形描述直观判断几个数据维度存在何种相关关系,但是难以解决维数灾难问题。一些数据挖掘方法虽然可行,但是难以把过程具象化,并且在一些应用场景下仍然需要可视化方法提供参数指导。提出了ASExplorer:一个探索高维数据维度相关性为目的的可视分析系统。该系统首先基于联合熵的维度重要性评价算法,帮助用户选择分析路径和过滤数据,然后基于以采样尺度为中心的交互探索方法,令用户可以同时探索多个数据维度在采样尺度变化时的关联关系。该系统适用于缺乏先验知识的数据集的早期分析过程,案例分析和用户研究验证了该系统的有效性。  相似文献   

10.
Modelling relationship between entities in real‐world systems with a simple graph is a standard approach. However, reality is better embraced as several interdependent subsystems (or layers). Recently, the concept of a multilayer network model has emerged from the field of complex systems. This model can be applied to a wide range of real‐world data sets. Examples of multilayer networks can be found in the domains of life sciences, sociology, digital humanities and more. Within the domain of graph visualization, there are many systems which visualize data sets having many characteristics of multilayer graphs. This report provides a state of the art and a structured analysis of contemporary multilayer network visualization, not only for researchers in visualization, but also for those who aim to visualize multilayer networks in the domain of complex systems, as well as those developing systems across application domains. We have explored the visualization literature to survey visualization techniques suitable for multilayer graph visualization, as well as tools, tasks and analytic techniques from within application domains. This report also identifies the outstanding challenges for multilayer graph visualization and suggests future research directions for addressing them.  相似文献   

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