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检索条件"任意字段=Conference on Visualization and Optimization Techniques"

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Multi-scale banking to 45°

Multi-scale banking to 45°

引用

IEEE visualization conference (Vis 2006)/IEEE Symposium on Information visualization (InfoVis 2006)

作者： Heer, Jeffrey Agrawala, Maneesh Univ Calif Berkeley Div Comp Sci Berkeley CA 94720 USA

In his text Visualizing Data, William Cleveland demonstrates how the aspect ratio of a line chart can affect an analyst's perception of trends in the data. Cleveland proposes an optimization technique for computing the aspect ratio such that the average absolute orientation of line segments in the chart is equal to 45 degrees. This technique, called banking to 45 degrees, is designed to maximize the discriminability of the orientations of the line segments in the chart. In this paper, we revisit this classic result and describe two new extensions. First, we propose alternate optimization criteria designed to further improve the visual perception of line segment orientations. Second, we develop multi-scale banking, a technique that combines spectral analysis with banking to 45 degrees. Our technique automatically identifies trends at various frequency scales and then generates a banked chart for each of these scales. We demonstrate the utility of our techniques in a range of visualization tools and analysis examples.

关键词： information visualization banking to 45 degrees line charts time-series sparklines graphical perception

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FRAMEWORK FOR A HYBRID SIMULATION APPROACH FOR AN INTEGRATED DECISION SUPPORT SYSTEM IN HEALTHCARE FACILITIES 18

FRAMEWORK FOR A HYBRID SIMULATION APPROACH FOR AN INTEGRATED...

引用

Winter Simulation conference (WSC)

作者： Lather, Jennifer I. Messner, John I. Penn State Univ Dept Architectural Engn 104 Engn Unit A University Pk PA 16802 USA

ISBN: (纸本)9781538665725

There is a lack of integration of facility planning techniques in the design and layout of healthcare facilities. Computational models can be used to evaluate minimal distances or cost functions. Discrete event simulations can be used to model the stochastic nature of operations to check the impact on specific performance measures. visualization can be used to immerse decision makers in the future environment to aid model validity, communication, and understanding. In this paper, we discuss three techniques: mathematical optimization, discrete event simulation, and virtual visualization, and present a framework for using them in an integrated hybrid simulation modeling approach in the healthcare planning process. We present objectives for the use of these techniques throughout the lifecycle in one unit of a healthcare facility. These techniques, while described in a healthcare context, have implications for other domains where uncertain and latent processes are components of the layout decision making process.

关键词： Medical services Layout optimization Solid modeling Discrete event simulation Planning Buildings

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Visual Analytics to Support Industrial Vehicle Fleet Planning 25

Visual Analytics to Support Industrial Vehicle Fleet Plannin...

引用

25th International conference Information Visualisation (IV) - AI and Visual Analytics and Data Science

作者： Ferreira, Guilherme X. de Paula, Melise Maria, V Pagan, Rafael P. Batista, Bruno G. Univ Fed Itajuba UNIFEI Programa Posgrad Ciencia & Tecnol Comp Itajuba Brazil DDMX Inteligencia Analise Dados Itajuba Brazil

ISBN: (纸本)9781665438278

Data analytics is becoming more important due to the data generated by the immensity of systems driven by widespread use of internet and mobile devices. Getting useful information from a lot of data is a challenge that visual analytics can be an alternative to. Visual analytics promotes information visualization and data mining techniques to consolidate and extract insightful information from databases. This paper aims to apply visual analytics concepts to help new logistic solutions prospection for optimization of industrial vehicles fleet. As a result, an artifact prototype able to assess the fleet behavior in terms of operational and available vehicles was developed. The prototype was evaluated based on information visualization and visual analytics practices.

关键词： visual analytics information visualization fleet planning fleet management

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optimization-oriented visualization of cache access behavior

Optimization-oriented visualization of cache access behavior

引用

5th International conference on Computational Science (ICCS 2005)

作者： Tao, J Karl, W Univ Karlsruhe TH Inst Rechnerentwurf & Fehlertoleranz D-76128 Karlsruhe Germany

ISBN: (纸本)3540260439

Cache performance is regarded as a critical issue that significantly influences the overall performance of a computer system. Hence, optimization with respect to cache behavior forms an important topic in both research and commercial areas. This work aims at helping the user in the task of cache behavior analysis with a comprehensive visualization tool. The resulted cache visualizer is capable of presenting the various aspects of cache accesses, and shows the performance data in a high-level, user-readable way. More specially, it directly leads the user to the data structures where excessive cache misses occur. It then further depicts the reason of theses misses. In addition, it helps the user to decide important parameters concerning some optimization techniques, e.g. padding stride and size of cache blocks. Examples of initial optimization based on the visualizer have proven the feasibility of this visualization tool.

关键词： visualization

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Intelligent visualization and Forecasting of Stocks Using Machine Learning 11

Intelligent Visualization and Forecasting of Stocks Using Ma...

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11th International conference on Reliability, Infocom Technologies and optimization, ICRITO 2024

作者： Singh, Amrinder Anjum, Misbah Amity University of Information Technology Amiy University Uttar Pradesh India

ISBN: (纸本)9798350350357

Accurate stock price prediction and analysis are now essential for businesses and investors in today's market. The accuracy with which traditional approaches to forecasting and visualizing stock data may predict future patterns has been demonstrated to be limited. This work suggests a novel method for utilizing machine learning algorithms for intelligent stock price and predictions and visualization in order to overcome this difficulty. The principal objective of this research is to develop a prediction model that leverages machine learning techniques to effectively assess historical stock data and generate accurate forecasts. The proposed model combines two machine learning techniques, regression, and time series analysis, to capture the complex relationships and patterns observed in the data. Additionally, the development of intelligent visualization approaches that improve stock data interpretation and comprehension is a focus of this work. The model uses cutting-edge data visualization techniques to give user engaging and clear visual representation of stock trends, which facilitates pattern recognition and helps users make well-informed investing decisions. The effectiveness proposed methodology is evaluated by employing real stock market data. The results outperform traditional forecasting methods in terms of performance. Users are additionally enabled by the intelligent visualization capabilities to comprehend the variable effecting stock value and predict future changes in the market. © 2024 IEEE.

关键词： Support vector machines

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Enhancing Software Security visualization through Adaptive Level of Detail (LoD) Mechanisms: A City Metaphor-Based Approach 9

Enhancing Software Security Visualization through Adaptive L...

引用

9th International conference on Information Technology Research

作者： Devendra, Ishara Wijesiriwardana, Chaman Wimalaratne, Prasad Univ Moratuwa Dept Informat Technol Moratuwa Sri Lanka Univ Colombo Fac Grad Studies Colombo Sri Lanka Univ Colombo Dept Commun & Media Technol Sch Comp Colombo 07 Sri Lanka

ISBN: (纸本)9798331511425;9798331511432

As software becomes larger and more complex, the need for effective visualization techniques that can adaptively display different levels of detail is increasing. With the visualization of software security vulnerabilities, software practitioners may understand the code issues well and look for necessary solutions. While there are existing solutions for visualizing software securely in complex codebases, a critical need still exists for novel interactive visualization techniques that can adaptively present various aspects of software systems, including security vulnerabilities, code structures, dependencies, relationships, and performance bottlenecks. As software systems become increasingly complex, the Level of Detail (LoD) mechanism encounters several challenges in enabling the efficient exploration and comprehension of sophisticated code structures in a user-friendly manner. To address these challenges, this paper proposes an advanced LoD mechanism, utilizing a city metaphor for software visualization. This approach enhances software visualization by dynamically adjusting the Level of Detail (LoD) presented based on user roles and tasks, code metrics, and real-time code changes. This method is expected to contribute to more effective outcomes, particularly in enhancing the effectiveness of content-aware LoD switching, real-time performance optimization, and user-centric customizations. Furthermore, this approach seamlessly integrates into the software development process, providing continuous feedback and enabling developers to identify security vulnerabilities and performance bottlenecks.

关键词： Adaptive Level of Detail (LoD) Software visualization City Metaphor Dynamic Data Representation

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Vorticity based flow analysis and visualization for pelton turbine design optimization 04

Vorticity based flow analysis and visualization for pelton t...

引用

IEEE visualization 2004 conference

作者： Sadlo, F Peikert, R Parkinson, E ETH Zurich Switzerland

ISBN: (纸本)0780387880

Vorticity is the quantity used to describe the creation, transformation and extinction of vortices. It is present not only in vortices but also in shear flow. Especially in ducted flows, most of the overall vorticity is usually contained in the boundary layer. When a vortex develops from the boundary layer, this can be described by transport of vorticity. For a better understanding of a flow it is therefore of interest to examine vorticity in all of its different roles. The goal of this application study was not primarily the visualization of vortices but of vorticity distribution and its role in vortex phenomena. The underlying industry at case is a design optimization for a Pelton turbine. An important industrial objective is to improve the quality of the water jets driving the runner. Jet quality is affected mostly by vortices originating in the distributor ring. For a better understanding of this interrelation, it is crucial to not only visualize these vortices but also to analyze the mechanisms of their creation. We used various techniques for the visualization of vorticity, including field lines and modified isosurfaces. For field line based visualization, we extended the image-guided streamline placement algorithm of Turk and Banks to data-guided field line placement on three-dimensional unstructured grids.

关键词： flow visualization feature extraction line placement

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Visualizing the tightening of knots

Visualizing the tightening of knots

引用

IEEE visualization 2005 conference

作者： Cantarella, J Piatek, M Rawdon, E Univ Georgia Athens GA 30602 USA

ISBN: (纸本)0780394623

The study of physical models for knots has recently received much interest in the mathematics community. In this paper, we consider the ropelength model, which considers knots tied in an idealized rope. This model is interesting in pure mathematics, and has been applied to the study of a variety of problems in the natural sciences as well. Modeling and visualizing the tightening of knots in this idealized rope poses some interesting challenges in computer graphics. In particular, self-contact in a deformable rope model is a difficult problem which cannot be handled by standard techniques. In this paper, we describe a solution based on reformulating the contact problem and using constrained-gradient techniques from nonlinear optimization. The resulting animations reveal new properties of the tightening flow and provide new insights into the geometric structure of tight knots and links.

关键词： collision detection contact flexible models tight knots ideal knots ropelength nonlinear optimization constrained least squares

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VIRTUAL REALITY visualization OF CFD SIMULATION FOR IRON/STEELMAKING PROCESSES

VIRTUAL REALITY VISUALIZATION OF CFD SIMULATION FOR IRON/STE...

引用

14th International Heat Transfer conference

作者： Fu, Dong Wu, Bin Chen, Guoheng Moreland, John Tian, Fengguo Hu, Yuzhu Zhou, Chenn Q. Purdue Univ Calumet Dept Mech Engn Hammond IN 46321 USA

ISBN: (纸本)9780791849392

Computational Fluid Dynamics (CFD) has become a powerful simulation technology used in iron/steelmaking industrial applications for process design and optimization to save energy. In this paper, a Virtual Engineering (VE) application is presented that uses Virtual Reality (VR) to visualize CFD results in a tracked immersive projection system. The interactive Virtual Reality (VR) was specifically adapted for CFD post-processing to better understand CFD results and more efficiently communicate with non-CFD experts. The VE application has been utilized to make an assessment in terms of visualization and optimization for steelmaking furnaces. The immersive system makes it possible to gain a quick, intuitive understanding of the flow characteristics and distributions of pressure, temperature, and species properties in the industrial equipment. By introducing the virtual engineering environment, the value of CFD simulations has been greatly enhanced to allow engineers to gain much needed process insights for the design and optimization of industrial processes.

关键词： Computational Fluid Dynamics Virtual Reality visualization Immersive System

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Research on the Algorithm for Grid-Based Hexahedral Mesh Generation of CAD Assembly Models 5

Research on the Algorithm for Grid-Based Hexahedral Mesh Gen...

引用

5th International conference on Virtual Reality and visualization (ICVRV)

作者： Yu, Changhua Xiong, Min Fang, Wei Xu, Quan Zheng, Peng Zhang, Xianhong Leng, Juelin China Acad Engn Phys Inst Comp Applicat Mianyang Sichuan Peoples R China CAEP Software Ctr High Performance Numer Simulat Mianyang Sichuan Peoples R China

ISBN: (纸本)9781467376730

According to the geometric sharp features of CAD assembly models, an algorithm for the automated generation of grid-based full hexahedral element meshes was developed. This method involves six steps: geometric feature identification, cubic grid structure generation, jagged core mesh generation, surface matching, topological optimization and node smoothing. In the grid-based hexahedral mesh, the quality of the inner mesh is fine, the quality and the topological connections are very bad. Considering the specialty of the grid-based, this paper focused on the research for the surface matching and the topological optimization techniques in the grid-based hexahedral mesh generation. Among the surface matching process in this paper, a new matching algorithm combining the embedding technique was proposed, establishing the corresponding the boundary element relation between solid models and core grid, to make the hexahedral mesh accurately describe the geometric features of multiple-component assemblies. Among the topological optimization process, a new optimization technique was proposed, building the hexahedral shrink sets for the every geometry body and geometry surface, and then eliminating the hexahedral elements with bad topological connection by adding a layer of hexahedral elements on the boundary of the corresponding shrink set. Numerical examples show that the hexahedral mesh generated by the algorithm proposed in this paper described accurately the geometric features of the numerical models, and eliminated the poor hexahedral elements.

关键词： Hexahedral mesh CAD assembly model Surface matching Topological optimization

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