Light Transport in Realistic Rendering: State-of-the-Art Simulation Methods

2021 ◽  
Vol 47 (4) ◽  
pp. 298-326
Author(s):  
V. A. Frolov ◽  
A. G. Voloboy ◽  
S. V. Ershov ◽  
V. A. Galaktionov
Keyword(s):  
State Of The Art ◽  
Light Transport ◽  
Simulation Methods ◽  
Realistic Rendering

scholarly journals Light Transport Simulation and Realistic Rendering: State of the Art Report

2021 ◽  
Author(s):  
Vladimir Alexandrovich Frolov ◽  
Alexey Gennadievich Voloboy ◽  
Sergey Valentinovich Ershov ◽  
Vladimir Alexandrovich Galaktionov
Keyword(s):  
State Of The Art ◽  
Light Transport ◽  
Realistic Rendering ◽  
Software Products ◽  
Transport Simulation ◽  
Mathematical Properties ◽  
Method Selection ◽  
Block Scheme ◽  
Applied Researcher ◽  
Light Transport Simulation

The field of light transport simulation quickly growths in last decades. Nowadays there are about hundreds of books and papers that are quite difficult to cover for applied researcher or developer. Unlike similar surveys, in this paper we make attempt to provide short roadmap to select the best method for some light transport problem based on scene and calculated phenomena constraints. In our paper we propose several classifications for light transport simulation algorithms based on their mathematical properties, robustness and required scene constraints. These classifications help to understand advantages, disadvantages and limitations of the methods. In this paper we use not only a survey of existing works but also our own experience with the methods that we have implemented over the last decade in different software products. Some results of our experiments are shown in the paper. Finally, we propose a short guide for method selection in form of block scheme.

scholarly journals Review of Finite Element Vehicle Interior Acoustic Simulations Including Porous Materials

2019 ◽  
Author(s):  
János Csaba Kun ◽  
Daniel Feszty
Keyword(s):  
Finite Element ◽  
State Of The Art ◽  
Academic Research ◽  
Simulation Methods ◽  
Vehicle Engineering ◽  
Vehicle Interior ◽  
Poroelastic Materials ◽  
Recent Trends ◽  
Noise Vibration ◽  
Difficult Issue

Recent trends in vehicle engineering require manufacturers to develop products with highly refined noise, vibration and harshness levels. The use of trim elements, which can be described as Poroelastic materials (PEM), are key to achieve quiet interiors. Finite Element Methods (FEM) provide established solutions to simple acoustic problems. However, the inclusion of poroelastic materials, especially at higher frequencies, proves to be a difficult issue to overcome. The goal of this paper was to summarize the state-of-the-art solutions to acoustic challenges involving FEM-PEM simulation methods. This involves investigation of measurement and simulation campaigns both on industrial and fundamental academic research levels.

scholarly journals The current state of the methods for calculating global illumination in tasks of realistic computer graphics

2021 ◽  
Vol 33 (2) ◽  
pp. 7-48
Author(s):  
Vladimir Frolov ◽  
Alexey Gennadievich Voloboy ◽  
Sergey Valentinovich Ershov ◽  
Vladimir Alexandrovich Galaktionov
Keyword(s):  
Computer Graphics ◽  
Numerical Experiments ◽  
State Of The Art ◽  
Global Illumination ◽  
Software Implementation ◽  
Light Transport ◽  
Multiple Reflections ◽  
Advantages And Disadvantages ◽  
Current State ◽  
Survey Papers

Modern realistic computer graphics are based on light transport simulation. In this case, one of the main and difficult to calculate tasks is to calculate the global illumination, i.e. distribution of light in a virtual scene, taking into account multiple reflections and scattering of light and all kinds of its interaction with objects in the scene. Hundreds of publications and describing dozens of methods are devoted to this problem. In this state-of-the-art review, we would like not only to list and briefly describe these methods, but also to give some “map” of existing works, which will allow the reader to navigate, understand their advantages and disadvantages, and, thereby, choose a right method for themselves. Particular attention is paid to such characteristics of the methods as robustness and universality in relation to the used mathematical models, the transparency of the method verification, the possibility of efficient implementation on the GPU, as well as restrictions imposed on the scene or illumination phenomena. In contrast to the existing survey papers, not only the efficiency of the methods is analyzed, but also their limitations and the complexity of software implementation. In addition, we provide the results of our own numerical experiments with various methods that serve as illustrations for the conclusions.

scholarly journals Modern Optimization and Simulation Methods in Managerial and Business Economics: A Review

2020 ◽  
Vol 10 (3) ◽  
pp. 47
Author(s):  
Laura Calvet ◽  
Rocio de la Torre ◽  
Anita Goyal ◽  
Mage Marmol ◽  
Angel Juan
Keyword(s):  
State Of The Art ◽  
Global Market ◽  
Imperfect Markets ◽  
Simulation Methods ◽  
Business Economics ◽  
Scarce Resources ◽  
Optimization Simulation ◽  
Optimization And Simulation ◽  
Fierce Competition ◽  
Modern Optimization

Managerial and Business Economics (ME/BE) aims at using quantitative and computational methods to make an efficient (ideally optimal) assignment of the scarce resources owned by firms and organizations. In the current global market, characterized by a fierce competition, an optimal use of the available resources is more important than ever for guaranteeing the economical sustainability of organizations and enterprises of any size. Heuristic optimization algorithms and simulation methods have been successfully employed to analyze and enhance complex systems and processes in a myriad of ME/BE-related fields. This paper reviews recent works on the use of these methodologies in competitive markets, as well as in imperfect markets considering externalities. The paper also discusses open challenges and how state-of-the art methods combining optimization, simulation, and machine learning can contribute to properly address them.

Theoretical Chemical Characterization of Energetic Materials

2005 ◽  
Vol 896 ◽  
Author(s):  
Betsy Mavity Rice ◽  
Edward F. C. Byrd
Keyword(s):  
Energetic Materials ◽  
Atomistic Simulation ◽  
State Of The Art ◽  
Energetic Material ◽  
Chemical Characterization ◽  
Theoretical Chemistry ◽  
Atomistic Simulations ◽  
Simulation Methods ◽  
Design Development

AbstractOur research is focused on developing computational capabilities for the prediction of properties of energetic materials associated with performance and sensitivity. Additionally, we want to identify and characterize the dynamic processes that influence conversion of an energetic material to products upon initiation. We are attempting to achieve these goals through the use of standard atomistic simulation methods. In this paper various theoretical chemistry methods and applications to energetic materials will be described. Current capabilities in predicting structures, thermodynamic properties, and dynamic behavior of these materials will be demonstrated. These are presented to exemplify how information generated from atomistic simulations can be used in the design, development, and testing of new energetic materials. In addition to illustrating current capabilities, we will discuss limitations of the methodologies and needs for advancing the state of the art in this area.

Theoretical chemical characterization of energetic materials

2006 ◽  
Vol 21 (10) ◽  
pp. 2444-2452 ◽  
Author(s):  
Betsy M. Rice ◽  
Edward F.C. Byrd
Keyword(s):  
Energetic Materials ◽  
Atomistic Simulation ◽  
State Of The Art ◽  
Energetic Material ◽  
Chemical Characterization ◽  
Theoretical Chemistry ◽  
Atomistic Simulations ◽  
Simulation Methods ◽  
Design Development

Our research is focused on developing computational capabilities for the prediction of properties of energetic materials associated with performance and sensitivity. Additionally, we want to identify and characterize the dynamic processes that influence conversion of an energetic material to products upon initiation. We are attempting to achieve these goals through the use of standard atomistic simulation methods. In this paper, various theoretical chemistry methods and applications to energetic materials will be described. Current capabilities in predicting structures, thermodynamic properties, and dynamic behavior of these materials will be demonstrated. These are presented to exemplify how information generated from atomistic simulations can be used in the design, development, and testing of new energetic materials. In addition to illustrating current capabilities, we will discuss limitations of the methodologies and needs for advancing the state of the art in this area.

scholarly journals Cutting-Edge Turbulence Simulation Methods for Wind Energy and Aerospace Problems

Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 288
Author(s):  
Stefan Heinz ◽  
Joachim Peinke ◽  
Bernhard Stoevesandt
Keyword(s):  
Wind Energy ◽  
Turbulent Flow ◽  
Hybrid Methods ◽  
State Of The Art ◽  
Flow Simulation ◽  
The State ◽  
Simulation Methods ◽  
Basic Requirement ◽  
Turbulence Simulation ◽  
Correct Communication

The availability of reliable and efficient turbulent flow simulation methods is highly beneficial for wind energy and aerospace developments. However, existing simulation methods suffer from significant shortcomings. In particular, the most promising methods (hybrid RANS-LES methods) face divergent developments over decades, there is a significant waste of resources and opportunities. It is very likely that this development will continue as long as there is little awareness of conceptional differences of hybrid methods and their implications. The main purpose of this paper is to contribute to such clarification by identifying a basic requirement for the proper functioning of hybrid RANS-LES methods: a physically correct communication of RANS and LES modes. The state of the art of continuous eddy simulations (CES) methods (which include the required mode communication) is described and requirements for further developments are presented.

Modeling and Simulation Methods for Design of Engineering Systems

2000 ◽  
Vol 1 (1) ◽  
pp. 84-91 ◽  
Author(s):  
Rajarishi Sinha ◽  
Christiaan J. J. Paredis ◽  
Vei-Chung Liang ◽  
Pradeep K. Khosla
Keyword(s):  
Modeling And Simulation ◽  
Design Process ◽  
State Of The Art ◽  
Simulation Software ◽  
Modeling Languages ◽  
Simulation Methods ◽  
Design Tools ◽  
Engineering Systems ◽  
Simulation Based Design ◽  
Simulation Based

This article presents an overview of the state-of-the art in modeling and simulation, and studies to which extent current simulation technologies can effectively support the design process. For simulation-based design, modeling languages and simulation environments must take into account the special characteristics of the design process. For instance, languages should allow models to be easily updated and extended to accommodate the various analyses performed throughout the design process. Furthermore, the simulation software should be well integrated with the design tools so that designers and analysts with expertise in different domains can effectively collaborate on the design of complex artifacts. This review focuses in particular on modeling for design of multi-disciplinary engineering systems that combine continuous time and discrete time phenomena.

Theory of Scanning Probe Microscopy of Carbon Nanostructures

2004 ◽  
Vol 838 ◽  
Author(s):  
Vincent Meunier ◽  
Sergei Kalinin ◽  
Philippe Lambin
Keyword(s):  
Scanning Probe Microscopy ◽  
Carbon Nanostructures ◽  
State Of The Art ◽  
Scanning Probe ◽  
Computational Techniques ◽  
Simulation Methods ◽  
Probe Microscopy ◽  
Modeling Methods ◽  
Imaging And Spectroscopy ◽  
Low Dimensional

ABSTRACTExperimental techniques for SPM imaging and spectroscopy of low-dimensional systems have significantly progressed in recent years. At the same time, new simulation methods and computational techniques have allowed the development of a theoretical basis to the interpretation and understanding of the measurements. In this contribution, we concisely review two state-of-the-art modeling methods for scanning probe microscopy, as applied to carbon nanostructures.

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