共查询到20条相似文献，搜索用时 15 毫秒
1.
Megan Damon Masanori C. Kameyama Michael Knox David H. Porter Dave Yuen Erik O. D. Sevre 《Visual Geosciences》2008,13(1):49-57
The current availability of thousands of processors at many high performance computing centers has made it feasible to carry
out, in near real time, interactive visualization of 3D mantle convection temperature fields, using grid configurations having
10–100 million unknowns. We will describe the technical details involved in carrying out this endeavor, using the facilities
available at the Laboratory of Computational Science and Engineering (LCSE) at the University of Minnesota. These technical
details involve the modification of a parallel mantle convection program, ACuTEMan; the usage of client–server socket based
programs to transfer upwards of a terabyte of time series scientific model data using a local network; a rendering system
containing multiple nodes; a high resolution PowerWall display, and the interactive visualization software, DSCVR. We have
found that working in an interactive visualizastion mode allows for fast and efficient analysis of mantle convection results.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
2.
Recent increases in the computational power of high-performance computing systems have led to a large gap between the high-resolution runs of numerical simulations—typically approaching 50–100 million tracers and 1–5 million grid points in two dimensions—and the modest resolution of 1–2 million pixels for conventional display devices. This technical problem is further compounded by the variety of fields produced by numerical simulations and the limited bandwidth available through the Internet in the course of collaborative ventures. We have developed a visualization system using the paradigm of web-based inquiry to address these mounting problems. We have employed, as a case study, a problem involving two-dimensional multi-scale dynamics of hydrous cold plumes at subduction zones. A Lagrangian marker method, in which the number of markers varies dynamically, is used to delineate the many different fields, such as temperature, viscosity, strain, and chemical composition. We found commercially available software to be insufficient for our visualization needs and so we were driven to develop a new set of tools tailored to high-resolution, multi-aspect, multi-scale simulations, and adaptable to many other applications in which large datasets involving tens of millions of tracers with many different fields are prevalent. In order to address this gap in visualization techniques, we have developed solutions for remote visualization and for local visualization. Our remote visualization solution is a web-based, zoomable image service (WEB-IS) that requires minimal bandwidth while allowing the user to explore our data through time, across many thermo–physical properties, and through different spatial scales. For local visualization, we found it optimal to use bandwidth-intensive, high-resolution display walls for performing parallel visualization in order to best comprehend the causal and temporal relationships between the multiple physical and chemical properties in a simulation.Electronic Supplementary Material Supplementary material is available in the online version of this article at http://dx.doi.org/10.1007/s10069-004-0017-2 相似文献
3.
Shi Chen Huai Zhang David A. Yuen Shuxia Zhang Jian Zhang Yaolin Shi 《Visual Geosciences》2008,13(1):97-104
We propose a new approach to utilize the algorithm of hardware-assisted visibility sorting (HAVS) in the 3D volume rendering
of spherical mantle convection simulation results over unstructured grid configurations. We will also share our experience
in using three different spherical convection codes and then taking full advantages of the enhanced efficiency of visualization
techniques, which are based on the HAVS techniques and related transfer functions. The transfer function is a powerful tool
designed specifically for editing and exploring large-scale datasets coming from numerical computation for a given environmental
setting, and generates hierarchical data structures, which will be used in the future for fast access of GPU visualization
facilities. This method will meet the coming urgent needs of real-time visualization of 3D mantle convection, by avoiding
the demands of huge amount of I/O space and intensive network traffic over distributed parallel terascale or petascale architecture. 相似文献
4.
介绍了基于浏览器的Google Earth交互式系统、开发技术、Struts框架和Ajax技术,描述了系统架构及开发途径。基于浏览器的Google Earth交互式系统具有广泛的商业应用前景。 相似文献
5.
Dave R. Stegman Louis Moresi Robert Turnbull Julian Giordani Patrick Sunter Alan Lo Steve Quenette 《Visual Geosciences》2008,13(1):71-84
High-performance computing provides unprecedented capabilities to produce higher resolution 4-D models in a fraction of time.
Thus, the need exists for a new generation of visualization systems able to maintain parity with the enormous volume of data
generated. In attempting to write this much data to disk, each computational step introduces a significant performance bottleneck,
yet most existing visualization software packages inherently rely on reading data in from a dump file. Available packages
make this assumption of postprocessing at quite a fundamental level and are not very well suited for plotting very large numbers
of specialized particles. This necessitates the creation of a new visualization system that meets the needs of large-scale
geodynamic modeling. We have developed such a system, gLucifer, using a software framework approach that allows efficient
reuse of our efforts in other areas of research. gLucifer is capable of producing movies of a 4-D data set “on the fly” (simultaneously
with running the parallel scientific application) without creating a performance bottleneck. By eliminating most of the human
efforts involved in visualizing results through postprocessing, gLucifer reconnects the scientist to the numerical experiment
as it unfolds. Data sets that were previously very difficult to even manage may be efficiently explored and interrogated without
writing to disk, and because this approach is based entirely on memory distributed across as many processors as are being
utilized by the scientific application, the visualization solution is scalable into terabytes of data being rendered in real
time. 相似文献
6.
Postglacial rebound is a major geological process which plays an important role in many areas in the earth sciences. Up to
now, most of the images derived from studies of the glacial isostatic adjustment phenomenon have been concerned with surface
signatures, such as the uplift and gravity anomalies and not much attention has been paid on the dynamical responses in the
mantle. We will make use of the 3D visualization package Amira to depict both the external and internal deformation histories
of the transient viscoelastic flow inside the mantle induced by postglacial uplift. Of particularly great interest are the
transient displacement fields and shear heating inside the mantle. This same visualization technology can be brought to bear
in the future for visualizing tsunami waves in ocean basins excited by earthquakes, volcanic eruptions and InSAR images. We
have also integrated the visualization results into the Google Earth virtual globe by combining this scheme with the Amira
package to provide a better geographical and dynamical context.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
7.
Two-dimensional paper maps are well-established tsunami risk communication tools in coastal communities. Advances in GIS, geovisualization and spatial interface technologies suggest new opportunities to deliver tsunami risk communication using 3D, interactive and situated risk visualization. This paper introduces a set of geovisual interface constructs—dimensionality–interactivity–situatedness (DIS)—and evaluates their presence, absence and distribution in 129 examples of existing academic and public visual tsunami risk communication. The resulting analyses reveal structural differences in the distributions of DIS found in each of academic and public risk communication literatures, and opportunities for interactive location-aware risk communication. The second half of this paper reports on three new tsunami risk visualization interfaces informed by and developed to demonstrate how we might explore new undeveloped risk communication territory revealed by the DIS cube analysis. We discuss the design, rationale and implications of: EvacMap; ARRO3D; and Tsunamulator. These risk visualization interfaces deliver location-aware, user-centred risk maps, as well as virtual risk maps and tsunami simulations that can be viewed while standing in situ in coastal environments. This work is a first step intended to help the risk communication community systematically engage an emerging territory of interactive and location-aware 3D visualizations. This work aims to facilitate and encourage progress towards developing a new strand of interactive, situated geovisual risk communication research, by establishing these guiding constructs, their relationship to existing works and how they may inform the design of future systems and usability research. 相似文献
8.
9.
Yunsong Wang Evan F. Bollig Benjamin J. Kadlec Zachary A. Garbow Gordon Erlebacher David A. Yuen Maxwell Rudolph Lilli X. Yang Erik O. D. Sevre 《Visual Geosciences》2005,10(1):27-42
WEB-IS, Web-based Integrated System, allows remote, interactive visualization of large-scale 3-D data over the Internet, along with data analysis and data mining. In this paper, we discuss the overall structure of WEB-IS. Up until now we have developed three sub-modules geared towards geophysical problems. WEB-IS1 allows geoscientists to navigate through their 3-D geophysical data, such as seismic structures or numerical simulations, and interactively analyze the statistics or apply data-mining techniques, such as cluster analysis. WEB-IS2 lets a user control Amira (a powerful 3-D visualization package) remotely and analyze, render and view large datasets across the Internet. WEB-IS3 is an imaging service that enables the user to control the scale of features to view through interactive zooming. In the near future, we propose to integrate the three components together through a middleware framework called NaradaBrokering (iNtegrated Asynchronous Real-time Adaptive Distributed Architecture, a distributed messaging infrastructure that can be used to intelligently route data between the originators and registered consumers) without regard for time or location. As a result, WEB-IS will improve its scalability and acquire properties of fault-tolerance. WEB-IS uses a combination of Java, C++, and through the use of NaradaBrokering will seamlessly integrate the server-side processing and user interaction utilities on the client. The server takes care of the processor intensive tasks, such as visualization and data mining, and sends either the resulting bitmap image or statistical results to the middleware across the Internet for viewing. WEB-IS is an easy-to-use service, which will eventually help geoscientists collaborate from different sites in a natural manner. It will be very useful in the next 10 years because of the increasing number of space missions and geophysical campaigns. 相似文献
10.
讨论了亿万单元有限元模型的可扩展并行计算方法。从软件和硬件两个方面提出了前处理、并行计算方法、程序算法、后处理实现等核心问题的解决方案。采用网格加密方法生成一亿单元的有限元模型,利用对偶原始有限元撕裂内联法（FETI-DP）求解系统方程。基于图论理论建立了子区域间的通讯拓扑关系,实现了子区域间点对点通讯,避免速度慢、通信量大的全局通讯。在自主开发程序基础上,增加相应模块,采用面向对象编程技术和MPI消息传递库开发程序。对一个一亿多单元的工程实例运用5 000核并行计算,得到了超线性加速比。计算结果在专用图形工作站上进行后处理,显示和交互操作速度良好。研究在两方面实现了突破：一是将模型规模提高到了一亿多单元;二是同时调用了5 000个计算核来并行运算,并得到了很高效率。高分辨率有限元并行模拟研究成果可为岩土工程中结构特别复杂、计算区域特别大、地质情况复杂等模拟提供很好的技术方法和实现手段。 相似文献
11.
Eliza S. Bradley Dar A. Roberts Philip E. Dennison Robert O. Green Michael Eastwood Sarah R. Lundeen Ian B. McCubbin Ira Leifer 《Earth Science Informatics》2011,4(4):169-179
Web interfaces have made remote sensing image resources more accessible and interactive. However, many web-based and Digital
Earth opportunities for remote sensing have not yet been fully explored and could greatly facilitate scientific collaboration.
In many cases, these resources can augment traditional proprietary software packages, which can have limited flexibility,
spatiotemporal controls, and data synthesis abilities. In this paper, we discuss how web services and Google Earth were used
for time-critical geovisualizations of the NASA Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) Deepwater Horizon
oil spill imaging campaign. In particular, we describe how (1) AVIRIS Google Earth products were used to visualize the spatial
and temporal characteristics of the campaign’s image acquisitions, critically needed for flight planning, (2) the Google Fusion
Table cloud-based service was applied to create a highly-interactive image archive and mapping display, and (3) the Google
Fusion Table API was utilized to create a flexible PHP-based interface for metadata creation and as the basis for an interactive
data catalog. Although there are other possible software and programming approaches to these activities, we highlight freely-accessible
and flexible solutions and bring attention to the newly introduced Google Fusion Tables as a collaborative scientific platform. 相似文献
12.
This paper reports our research in developing a cyberinfrastructure platform to support multivariate visualization of data collected from distributed sensor network. Three new techniques were introduced in this platform: (1) a hybrid data caching strategy that takes advantages of a scalable and distributed time series database, OpenTSDB, to realize efficient data retrieval; (2) a hyper-dimensional data cube is established to map and translate multivariate and heterogeneous sensor data into a common data structure to support location-aware visual analysis; and (3) a data-driven visualization module is implemented to support interactive and dynamic visualization on a simulated virtual globe. A series of experiments were conducted to demonstrate the good runtime performance of the proposed system. We expect this work to make a major contribution to both the visualization building block development in cyberinfrastructure research and the advancement of visual presentation and analysis of sensor data in domain sciences. 相似文献
13.
目前，大地电磁测深的资料处理与正、反演软件都是FORTRAN语言编写的，由于FORTRAN语言本身的局限性，使得这个软件存在很多的缺陷，但是因为用FORTRAN语言编写的算法已经比较成熟，将它全部用其他语言移植也比较费时费力，为了避免资料的浪费，提高大地电磁测深的资料处理与交互式系统的开发效率，并且更加完善其功能，在开发大地电磁测深二维交互式正反演系统时，对大地电磁测深中的计算部分仍用现有的FORTRAN程序，对有关的界面与图形诉开发部分用VC＋＋语言来编写，以增强和体现其交互式的功能。 相似文献
14.
In recent years numerical investigations of tsunami wave propagation have been spurred by the magnitude 9.3 earthquake along
the Andaman–Sumatra fault in December, 2004. Visualization of tsunami waves being modeled can yield a much better physical
understanding about the manner of wave propagation over realistic seafloor bathymetries. In this paper we will review the
basic physics of tsunami wave propagation and illustrate how these waves can be visualized with the Amira visualization package.
We have employed both the linear and nonlinear versions of the shallow-water wave equation. We will give various examples
illustrating how the files can be loaded by Amira, how the wave-heights of the tsunami waves can be portrayed and viewed with
illumination from light sources and how movies can be used to facilitate physical understanding and give important information
in the initial stages of wave generation from interaction with the ambient geological surroundings. We will show examples
of tsunami waves being modeled in the South China Sea, Yellow Sea and southwest Pacific Ocean near the Solomon Islands. Visualization
should be a part of any training program for teaching the public about the potential danger arising from tsunami waves. We
propose that interactive visualization with a web-portal would be useful for understanding more complex tsunami wave behavior
from solving the 3-D Navier–Stokes equation in the near field. 相似文献
15.
Martín L. Larrea Silvia M. Castro Ernesto A. Bjerg 《Arabian Journal of Geosciences》2014,7(8):2981-2989
In the field of geology, as in many other fields, a common problem is the analysis of 2D sections. An example of this is the petrographic study of rock samples, i.e., the quantification of its mineral components and the percentages of each phase present in it. Conventionally, this quantification has been determined by point counting performed on thin sections. Although point counting is very time consuming, it is of common use in several domains including geology, biology, medicine, and materials sciences, among others. Point counting in thin sections is normally conducted through mechanical or electromechanical devices attached to a microscope; such devices are very expensive, offer limited functionality, and are very time consuming. In this contribution, we introduce an interactive visualization application called Rock.AR that reduces the amount of time required to apply this technique and simplify its work flow. It provides visual tools like distortion techniques, overview + detail, and statistics to assist the technique. A comparison between this application and similar tools through users' experiences is provided. We compare the time it takes to complete a session of point counting and the tools' usability. 相似文献
16.
地质实体模型的三维交互与分析技术研究 总被引：2，自引：0，他引：2
地质实体模型的三维可视化涉及到复杂地质体结构构造和相关地质属性数据的视觉表达与分析,利用科学计算可视化技术来充分、完整、交互式地展示与分析三维地质实体模型一直是三维地质建模领域的研究热点。研发的三维地质建模及可视化系统中可实现通用三维交互操作,包括三维模型的几何变换、三维交互定位与空间属性查询、三维模型的剖切、虚拟钻探、基坑开挖、隧道生成与虚拟漫游等。这些操作采用面向软件的技术,通过对现有的二维设备（如鼠标、键盘等）进行三维仿真,为全方位、多角度的认识和理解地质实体模型提供了强有力的支持。 相似文献
17.
Richard L. S. F. George Peter E. Robins Alan G. Davies Panagiotis D. Ritsos Jonathan C. Roberts 《Environmental Earth Sciences》2014,72(10):3753-3766
Researchers wish to study the potential impact of sea level rise from climate change, and visual analytic tools can allow scientists to visually examine and explore different possible scenarios from simulation runs. In particular, hydrodynamic flux is calculated to understand the net movement of water; but typically this calculation is tedious and is not easily achieved with traditional visualization and analytic tools. We present a visual analytic method that incorporates a transect profiler and flux calculator. The analytic software is incorporated into our visual analytics tool Vinca, and generates multiple transects, which can be visualized and analysed in several alternative visualizations; users can choose specific transects to compare against real-world data; users can explore how flux changes within a domain. In addition, we report how ocean scientists have used our tool to display multiple-view views of their data and analyse hydrodynamic flux for the coastal zone. 相似文献
18.
地质数据三维可视化的属性、分类和关键技术 总被引：7，自引：1，他引：6
地质数据三维可视化具有显著的空间决策支持属性,其应用分类包括表达可视化、分析可视化、过程可视化、设计可视化和决策可视化。能否实现这两类"五个可视化",是检验所有地质三维可视化软件的水平和质量的试金石。地质数据三维可视化技术在矿产资源勘查、工程地质勘查、矿山设计开发、水利水电工程设计、地质灾害勘查治理和国防工程建设领域,有着广泛的需求和应用前景。其发展趋势是实现地上、地下、地理、地质数据一体化三维可视化采集、存储、管理、处理和集成应用。复杂地质结构的表达和快速动态建模方法和技术,仍将是未来一段时间的研究重点,引进知识驱动和本体论思路、方法,可能是解决这些问题的有效途径。 相似文献
19.
二维大地电磁人机交互解释系统的实现 总被引：1，自引：1，他引：1
利用Fortran强大的数值计算能力和Visual Basic界面开发功能,通过动态链接库(DLL)连结,两种语言直接用文本传递,通过混合编程,开发出二维人机交互系统,实现了二维大地电磁人机交互解释系统电法资料的处理。介绍了解释系统的特点,并给出了在电法数值模拟和可视化技术中的具体应用实例。 相似文献
20.
Joao P.A. Silva Cristiano Lana Ariela Mazoz Ian Buick Ricardo Scholz 《Geostandards and Geoanalytical Research》2023,47(1):49-66
U-Pb Saturn is new freeware for U-Pb LA-ICP-MS data reduction. It has been developed to provide easy interaction with and visualisation of LA-ICP-MS U-Pb datasets, and allows fast and reliable data reduction of hundreds of data-points. Saturn offers dynamic graphic interfaces to quickly view, evaluate, and plot U-Pb and Pb-Pb isotope data. It operates online (or offline), giving the freedom to change parameters and reprocess data at any stage of data acquisition. The main interface allows the user to: (1) choose the best statistics for drift correction, (2) include/exclude offset factors and (3) apply (or not) Pbc corrections in different modes. Signal intensities are displayed in a separate graphic interface that allows users to interact with the time-resolved signal of individual spot analyses. All graphic windows are interactive; any modification to data treatment (e.g., inclusion or exclusion of analyses of reference material, or modification of the time-resolved signal windows) is instantaneously updated on the data tables. Saturn is particularly attractive for beginners in LA-ICP-MS U-Pb geochronology as it is non-commercial, easy to install, and very interactive. Coding information and a version of the software can be accessed at http://www.air.ufop.br . 相似文献