IDL5.0—第四代可视化语言的飞跃(连载之六)

ＩＤＬ５．０—第四代可视化语言的飞跃（连载之六）利用ＩＤＬ开发的商用遥感软件除了ＥＮＶＩ外还有以下几个软件：（１）３－ＤＳＡＲＧｒｏｕｎｄＳｔａｔｉｏｎ此软件是美国Ｖｅｘｅｌ公司用ＩＤＬ开发的用于ＳＡＲ（合成孔径雷达）数据地形校正的商业软件。此软件不...     

IDL5．0－第四代可视化语言的飞跃（连载之二）

ＩＤＬ５．０－第四代可视化语言的飞跃（连载之二）概述科学计算可视化（ＶｉｓｕａｌｉｚａｔｉｏｎｉｎＳｃｉｅｎｔｉｆｉｃＣｏｍＰｕｔｅｒｉｎｇ）是八十年代后期由美国科学家提出并发展的一门新兴边缘技术。它将科学计算过程中及计算结果所产生的数据转换成图形或...     

IDL5.0-第四代可视化语言的飞跃(连载之五)

ＩＤＬ５．０—第四代可视化语言的飞跃（连载之五）文章概述科学计算可视化（ＶｉｓｕａｌｉｚａｔｉｏｎｉｎＳｃｉｅｎｔｉｆｉｃＣｏｍｐｕｔｉｎｇ）是八十年代后期由美国科学家提出并发展的一门新兴边缘技术，它将科学计算过程中及计算结果所产生的数据转换成图形或...     

科技动态

科技动态ＩＤＬ５．０－第四代可视化语言的飞跃（连载之三）高级可视化ＩＤＬＳ．０的高级可视化不仅继承了ＩＤＩ－４．０．ｌ强大的可视化功能，而且在实时可视化模拟方面有了很大的改进。为了满足广泛的可视化需求，ＩＩｊｌ。５．０重新设计了其可视化结构，它由ＩＤ...     

IDL5．0──第四代可视化语言的飞跃

ＩＤＬ５．０──第四代可视化语言的飞跃概述科学计算可视化（Ｖｉｓｕａｌｉ。ｎｏｎｉｎＳｃｉｅｎｔｉｆｉｃＣｏｍｐｕｔｅｒ－ｉｎｇ）是八十年代后期由美国科学家提出并发展的一门新兴边缘技术，它将科学计算过程中及计算结果所产生的数据转换成图形或图象信息，并...     

用VC＋＋6.0编制自己的CD播放器

１ＶＣ＋＋６．０概述ＭｉｃｒｏＳｏｆｔ公司１９９８年推出了ＶｉｓｕａｌＣ＋＋６．０,它是支持Ｗｉｎ３２平台应用程序（ａｐｐｌｉｃａｔｉｏｎ）、服务（ｓｅｒｖｉｃｅ）和控件（ｃｏｎｔｒｏｌ）开发的可视化编程的集成环境,与ＶＣ＋＋５．０的最大不同之处是它...     

瑞星杀毒软件RAV9.0

我之所以选用ＲＡＶＷｉｎｄｏｗｓ９５／Ｗｉｎｄｏｗｓ９８／ＷｉｎｄｏｗｓＮＴ版９．０版,是因为它是国内查杀宏病毒种类较多、杀毒效果较好的杀毒软件;特别是查杀Ｗｏｒｄ９７宏病毒技术居国际领先水平。官也是率先清除ＣＩＨ病毒的软件之一,同时可彻底查杀“鬼病毒”;查毒速度快;误警率极低。瑞星杀毒软件ＲＡＶ９．０采用可视化界面。如图１所示。在“文件”菜单中,使用“保存查毒结果”命令,将显示在查毒结果信息区的所有查（杀）毒结果信息保存在文件“瑞星查毒结果．ＴＸＴ”中;使用“查阅查毒结果”命令,将调用Ｗｉｎｄ…     

一类本身具有预条件功能的ABS型共轭梯度算法

１．引言对于大型线性方程组Ａｘ＝ｂ,其中ＡＥＲｎｘｎ是一个非奇异矩阵,ｘ,ｂＲｎＶｏｙｅｖｏｄｉｎ［７］提出了一类共轭梯度算法．该算法中含有两个作为参数的非奇异矩阵Ｂ;ＣＲｎｘｎ,它们满足关系式ＣＡＢＣ－１＝ａＩ＋βＢＴＡＴ,（１）其中ａβＲ为纯量．设内积（ｘ,ｙ）＝ｙＴｘ为普通数量积,Ｖｏｙｅｖｏｄｉｎ共轭梯度法如下：算法１．步０．设。０为精确解０”的一个初始近似,计算残差,。一＊。。一ｂ．若,。＝０则停止;否则,置Ｓ。＝,。,ｉ二０,转步１．步１．计算。;＋１。;一（,;,＊,Ｊ八,;,＊＊…     

升技主板如何实现RAID 0

ＲＡＩＤ技术是一种非常实用的磁盘管理技术,它可以将多块硬盘作为一块来处理,大幅度提升硬盘的容量和性能（ＲＡＩＤ ０）,还可以将一块硬盘做成另一块相同硬盘的镜像,使数据更加安全可靠（ＲＡＩＤ １）。随着计算机技术的发展,以前只用于服务器的ＲＡＩＤ技术也渐入寻常百姓家,普通用户就可以通过ＩＤＥＲＡＩＤ卡或含有ＲＡＩＤ功能的主板构建自己的ＲＡＩＤ系统。今天我们就以升技ＫＴ７Ａ—ＲＡＩＤ主板为例,向您介绍一下实现ＩＬＡＩＤ的具体做法。 通常情况下,要实现ＲＡＩＤ ０和ＲＡＩＤ １功能最少需要两块硬盘,而实现 …     

过把RAID瘾——用升技主板实现RAID 0

ＲＡＩＤ技术是一种非常实用的磁盘管理技术,它可以将多块硬盘作为一块来处理,大幅度提升硬盘的容量和性能（ＲＡＩＤ ０）,还可以将一块硬盘做成另一块相同硬盘的镜像,使数据更加安全可靠（ＲＡＩＤ１）。随着计算机技术的发展,以前只用于服务器的ＲＡＩＤ技术也渐入寻常百姓家普通用户就可以通过ＩＤＥ　ＲＡＩＤ卡或含有ＲＡＩＤ功能的主板构建自己的ＲＡＩＤ系统。今天我们就以升技ＫＴ７Ａ－ＲＡＩＤ主板为例向您介绍一下实现ＲＡＩＤ的具体做法。 通常情况下,要实现 ＲＡＩＤ ０和 ＲＡＩＤ１功能最少需要两块硬盘,而实现 ＲＡ…     

VRML在三维动态交互地图可视化中的实践

针对三维动态交互地图的可视化问题,探讨了VRML的技术特点及其在解决三维动态交互地图可视化问题中的应用潜力和存在的问题,并采用Visual C^ 与VRML 2．0相结合进行了三维动态交互地图可视化的初步实践,取得了成功的应用。该工作主要集中在：（1）通过北京门头沟地区地形的可视化,探索了VRML表达较大数据量数字地形的能力;（2）开发了三维动态交互地图可视化的原型系统,并在北京人口变化可视化中进行了应用。     

RETRACTED ARTICLE: Texture-guided volumetric deformation and visualization using 3D moving least squares

Examining and manipulating the large volumetric data attract great interest for various applications. For such purpose, we first extend the 2D moving least squares (MLS) technique into 3D, and propose a texture-guided deformation technique for creating visualization styles through interactive manipulations of volumetric models using 3D MLS. Our framework includes focus+context (F+C) visualization for simultaneously showing the entire model after magnification, and the cut-away or illustrative visualization for providing a better understanding of anatomical and biological structures. Both visualization styles are widely applied in the graphics areas. We present a mechanism for defining features using high-dimensional texture information, and design an interface for visualizing, selecting and extracting features/objects of interest. Methods of the interactive or automatic generation of 3D control points are proposed for the flexible and plausible deformation. We describe a GPU-based implementation to achieve real-time performance of the deformation techniques and the manipulation operators. Different from physical deformation models, our framework is goal-oriented and user-guided. We demonstrate the robustness and efficiency of our framework using various volumetric datasets.     

Animated visualization of spatial–temporal trajectory data for air-traffic analysis

With increasing numbers of flights worldwide and a continuing rise in airport traffic, air-traffic management is faced with a number of challenges. These include monitoring, reporting, planning, and problem analysis of past and current air traffic, e.g., to identify hotspots, minimize delays, or to optimize sector assignments to air-traffic controllers. To cope with these challenges, cyber worlds can be used for interactive visual analysis and analytical reasoning based on aircraft trajectory data. However, with growing data size and complexity, visualization requires high computational efficiency to process that data within real-time constraints. This paper presents a technique for real-time animated visualization of massive trajectory data. It enables (1) interactive spatio-temporal filtering, (2) generic mapping of trajectory attributes to geometric representations and appearance, and (3) real-time rendering within 3D virtual environments such as virtual 3D airport or 3D city models. Different visualization metaphors can be efficiently built upon this technique such as temporal focus+context, density maps, or overview+detail methods. As a general-purpose visualization technique, it can be applied to general 3D and 3+1D trajectory data, e.g., traffic movement data, geo-referenced networks, or spatio-temporal data, and it supports related visual analytics and data mining tasks within cyber worlds.     

三维数字校园的设计与实现

以湖南师范大学为研究对象,对三维数字校园进行设计与实现。利用3DSMAX,AutoCAD,VRP及其他相关软件,通过资料收集整理、三维建模、纹理映射、渲染烘焙、交互设计、网络发布等一系列步骤,实现三维可视化、三维漫游、交互操作和信息查询等功能。特别地,对实现过程中的关键技术进行具体研究,以保证实现过程简便易行的同时,力求三维数字校园系统仿真度高、效率高、成本低,便于在数字校园的建设中进一步推广应用。     

3DIVE: An Immersive Environment for Interactive Volume Data Exploration

This paper describes an immersive system,called 3DIVE,for interactive volume data visualization and exploration inside the CAVE virtual environment.Combining interactive volume rendering and virtual reality provides a netural immersive environment for volumetric data visualization.More advanced data exploration operations,such as object level data manipulation,simulation and analysis ,are supported in 3DIVE by several new techniques,In particular,volume primitives and texture regions ae used for the rendering,manipulation,and collision detection of volumetric objects;and the region-based rendering pipeline is integrated with 3D image filters to provide an image-based mechanism for interactive transfer function design.The system has been recently released as public domain software for CAVE/ImmersaDesk users,and is currently being actively used by various scientific and biomedical visualization projects.     

基于Three.js的3D磁盘阵列设计

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.     

Analysis of Long Molecular Dynamics Simulations Using Interactive Focus+Context Visualization

Analyzing molecular dynamics (MD) simulations is a key aspect to understand protein dynamics and function. With increasing computational power, it is now possible to generate very long and complex simulations, which are cumbersome to explore using traditional 3D animations of protein movements. Guided by requirements derived from multiple focus groups with protein engineering experts, we designed and developed a novel interactive visual analysis approach for long and crowded MD simulations. In this approach, we link a dynamic 3D focus+context visualization with a 2D chart of time series data to guide the detection and navigation towards important spatio‐temporal events. The 3D visualization renders elements of interest in more detail and increases the temporal resolution dependent on the time series data or the spatial region of interest. In case studies with different MD simulation data sets and research questions, we found that the proposed visual analysis approach facilitates exploratory analysis to generate, confirm, or reject hypotheses about causalities. Finally, we derived design guidelines for interactive visual analysis of complex MD simulation data.     

三维虚拟无刷直流电机动态仿真方法研究

针对目前电机CAD软件直观性和交互性不强,本文设计了一个无刷直流电机(BLDCM)虚拟设计平台,将三维虚拟电机系统动态仿真引入到电机设计中。本系统采用3ds Max三维建模软件建立无刷直流电机系统仿真的虚拟场景,将电机系统虚拟仿真所需的数据存储在Microsoft SQL Server2005中以实现数据的共享,并使用OpenGL图形库对电机系统的三维模型进行重绘并控制以反映电机的实际运行状况。该软件提供了一个可视化的电机系统仿真环境,为电机设计的可靠性提供直观有效的依据。     

数据可视化程序开发包Open Inventor及其应用

介绍TGS公司的面向对象数据可视化应用程序开发包Open Inventor的体系架构、组成、特点及其应用.Open Inventor工具包由3D场景数据库、对象组件库、操作库以及Xt窗口4部分组成;在Open Inventor场景数据库中有大量已定义好的三维场景数据,这使得Open Inventor具有功能强大、编程高效易用和应用程序交互界面友好的特点.在此基础上给出基于Open Inventor开发应用程序的关键步骤,并通过3个实例说明Open Inventor在化学,工业设计和地学数据可视化方面的应用.     

Scientific sketching for collaborative VR visualization design

We present four studies investigating tools and methodologies for artist-scientist-technologist collaboration in designing multivariate, virtual reality (VR) visualizations. Design study 1 identifies the promise of 3D drawing-style interfaces for VR design and also establishes limitations of these tools with respect to precision and support for animation. Design study 2 explores animating artist-created visualization designs with scientific 3D fluid flow data. While results captured an accurate sense of flow that was advantageous as compared to the results of study 1, the potential for visual exploration using the design tools tested was limited. Design study 3 reveals the importance of a new 3D interface that overcomes the precision limitation found in study 1 while remaining accessible to artist collaborators. Drawing upon previous results, design study 4 engages collaborative teams in a design process that begins with traditional paper sketching and moves to animated, interactive, VR prototypes "sketched" by designers in VR using interactive 3D tools. Conclusions from these four studies identify important characteristics of effective artist-accessible VR visualization design tools and lead to a proposed formalized methodology for successful collaborative design that we expect to be useful in guiding future collaborations. We call this proposed methodology Scientific Sketching.