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A Monte Carlo study of high-energy photon transport in matter: application for multiple scattering investigation in Compton spectroscopy

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JOURNAL OF SYNCHROTRON RADIATION 2016年第1期23卷 244-252页

作者： Brancewicz, Marek Itou, Masayoshi Sakurai, Yoshiharu Japan Synchrotron Radiat Res Inst JASRI Sayo Hyogo 6795198 Japan

The first results of multiple scattering simulations of polarized high-energy X-rays for Compton experiments using a new Monte Carlo program, MUSCAT, are presented. The program is developed to follow the restrictions of real experimental geometries. The new simulation algorithm uses not only well known photon splitting and interaction forcing methods but it is also upgraded with the new propagation separation method and highly vectorized. In this paper, a detailed description of the new simulation algorithm is given. The code is verified by comparison with the previous experimental and simulation results by the ESRF group and new restricted geometry experiments carried out at SPring-8.

关键词： photon transport multiple scattering Monte Carlo Compton spectroscopy simulation algorithm

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simulation of magnetostatic wave envelope soliton propagation in yttrium iron garnet films

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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 1997年第5B期36卷 2966-2969页

作者： Koike, T Ito, T Hirao, T Taguchi, N Department of Electronic Engineering Tamagawa University Machida Tokyo 194 Japan

Although formation and propagation of magnetostatic soliton waves in YIG (yttrium iron garnet) films are attracting great attention, there has been no discussion about simulating soliton formation and propagation in YIG films from the viewpoint of circuit analysis and simulation. In this report, we propose anew algorithm to simulate the magnetostatic soliton wave output. We first describe the linear magnetostatic wave equivalent circuit model we have developed and then discuss the simulation algorithm, which combines the linear equivalent circuit model and the soliton wave solution of the nonlinear Schrodinger equation. The simulated results are in excellent agreement with reported experimental results. We also find that the proposed simulation is very effective to determine various physical parameters in the YIG film for given experimental conditions.

关键词： magnetostatic wave envelope soliton yttrium iron garnet films linear equivalent circuit model simulation algorithm

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Numerical prediction of surface topography and roughness in milling process

Numerical prediction of surface topography and roughness in ...

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7th International Conference on Progress of Machining Technology

作者： Gao, T Zhang, WH Qiu, KP Wan, M Northwestern Polytech Univ Xian 710072 Shanxi Peoples R China

ISBN: (纸本)780183500X

Machined surface topography is very critical since it affects directly the surface quality, especially the surface roughness. Based on the trajectory equations of the cutting edge relative to the workpiece, a new method is developed for the prediction of the machined surface topography. This method has the advantage of simplicity and it is a mesh-independent direct computing method over the traditional interpolation scheme. The topography value of any point on the machined surface can be calculated directly and the spindle runout can be taken into account. The validity of the method is demonstrated by several simulation examples of end and ball-end milling processes.

关键词： milling surface topography simulation algorithm

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An agent-based model of consumer demand

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BULLETIN OF ECONOMIC RESEARCH 2024年第4期76卷 935-950页

作者： Tsiatsios, Georgios Alkis Kollias, Iraklis Leventides, John Melas, Evangelos Natl & Kapodistrian Univ Athens Dept Econ Athens Greece

This paper studies an agent-based model of consumer demand. Agents are heterogeneous with respect to their preferences and incomes. There are two basic ingredients in the model. The first ingredient is a metric that captures the degree of heterogeneity between agents. The second ingredient is a serial computer algorithm that is used in order to compute a terminal consumption bundle at which income is exhausted and overall utility is maximized. Agents are clustered into heterogeneous groups based on their preferences and incomes. We extract information about the evolution of consumer expenditure under different price regimes and the buildup of optimal demand for varying levels of income and preference parameter values. These features cannot be obtained in the classical framework of static utility maximization. Our agent-based data-driven methodology can be applied to any relevant data set and so provide a reliable model for forecasting demand given some agent characteristics.

关键词： agent-based modeling heterogeneity simulation algorithm

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Computing Reachable simulations on Transition Systems 18th

Computing Reachable Simulations on Transition Systems

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18th International Conference on Reachability Problems (RP)

作者： Ganty, Pierre Manini, Nicolas Ranzato, Francesco IMDEA Software Inst Pozuelo De Alarcon Spain Univ Politecn Madrid Madrid Spain Univ Padua Padua Italy

ISBN: (纸本)9783031726200;9783031726217

We study the problem of computing the reachable principals of the simulation preorder and the reachable blocks of simulation equivalence. Following a theoretical investigation of this problem, which highlights a sharp contrast with the already settled case of bisimulation, we design algorithms to solve this problem by leveraging the idea of interleaving reachability and simulation computation while possibly avoiding the computation of all the reachable states or the whole simulation preorder. In particular, we put forward a symbolic algorithm processing state partitions and, in turn, relations between their blocks, which is suited for processing infinite-state systems.

关键词： simulation Reachability Reachable simulation Problem simulation algorithm Symbolic Data Structure

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An algorithm for Simulating Human Selective Attention 15th

An Algorithm for Simulating Human Selective Attention

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15th International Conference on Software Engineering and Formal Methods (SEFM)

作者： Broccia, Giovanna Milazzo, Paolo Olveczky, Peter Csaba Univ Pisa Dept Comp Sci Pisa Italy Univ Oslo Dept Informat Oslo Norway

ISBN: (纸本)9783319747811;9783319747804

The brain mechanism of selective attention plays a key role in determining the success of a human's interaction with a device. If the user has to perform concurrent tasks by interacting simultaneously with more than one device, her/his attention is directed at one of the devices at a time. Attention can therefore be seen as a shared resource, and the attentional mechanisms play the role of a task scheduler. In this paper we propose an algorithm for simulating the human selective attention. simulations can then be used to study situations in which a user has to interact simultaneously with multiple devices. This kind of study is particularly important in safety-critical contexts in which failures in the main task, such as driving a car or setting an infusion pump, may have serious consequences.

关键词： simulation algorithm Human-computer interaction Selective attention Cognitive load

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DEVELOPMENT OF SPACEBORNE RADAR SIMULATOR BY NICT AND JAXA USING JMA CLOUD-RESOLVING MODEL 30

DEVELOPMENT OF SPACEBORNE RADAR SIMULATOR BY NICT AND JAXA U...

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30th IEEE International Geoscience and Remote Sensing Symposium (IGARSS) on Remote Sensing - Global Vision for Local Action

作者： Kubota, Takuji Eito, Hisaki Aonashi, Kazumasa Hashimoto, Akihiro Iguchi, Toshio Hanado, Hiroshi Shimizu, Shuji Yoshida, Naofumi Oki, Riko Japan Aerosp Explorat Agcy Earth Observat Res Ctr Tsukuba Ibaraki Japan Japan Meteorol Agcy Numer Predict Div Tokyo Japan Japan Meteorol Agcy Meteorol Res Inst Tsukuba Ibaraki Japan Natl Inst Informat & Commun Technol Applied Electromagnet Res Ctr Koganei Tokyo Japan Natl Inst Informat & Commun Technol Okinawa Subtrop Environm Remote Sensing Ctr Okinawa Japan Japan Aerosp Explorat Agcy Earth Observat Res Ctr Chofu Tokyo Japan

ISBN: (纸本)9781424495665

This study demonstrated preliminary results in diagnosis of the numerical model with reference to the TRMM/PR, examples of the GPM/DPR synthetic data, and application of the synthetic data to the algorithm development in the nonuniform beamfilling correction method. These were performed using a satellite radar simulation algorithm by the National Institute of Information and Communications Technology (NICT) and the Japan Aerospace Exploration Agency (JAXA) named as the Integrated Satellite Observation Simulator for Radar (ISOSIM-Radar) and a cloud-resolving model by the Japan Meteorological Agency (JMA-NHM).

关键词： Global Precipitation Measurement dual-frequency precipitation radar cloud-resolving model simulation algorithm nonuniform beamfilling

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A Monte Carlo study of high-energy photon transport in matter: application for multiple scattering investigation in Compton spectroscopy

A Monte Carlo study of high-energy photon transport in matte...

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2nd Workshop on FEL Photon Diagnostics, Instrumentation and Beamlines Design (PhotonDiag)

作者： Brancewicz, Marek Itou, Masayoshi Sakurai, Yoshiharu Japan Synchrotron Radiat Res Inst JASRI Sayo Hyogo 6795198 Japan

关键词： photon transport multiple scattering Monte Carlo Compton spectroscopy simulation algorithm

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SPATIAL MODELING IN CELL BIOLOGY AT MULTIPLE LEVELS

SPATIAL MODELING IN CELL BIOLOGY AT MULTIPLE LEVELS

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2010 Winter simulation Conference

作者： Bittig, Arne T. Uhrmacher, Adelinde M. Univ Rostock D-18059 Rostock Germany

ISBN: (纸本)9781424498642

Most modeling and simulation approaches applied in cell biology assume a homogeneous distribution of particles in space, although experimental studies reveal the importance of space to understand the dynamics of cells. There are already numerous spatial approaches focusing on the simulation of cells. Recently, they have been complemented by a set of spatial modeling languages whose operational semantics are tied partly to existing simulation algorithms. These modeling languages allow an explicit description of spatial phenomena, and facilitate analysis of the temporal spatial dynamics of cells by a clear separation between model, semantics, and simulator. With the supported level of abstraction, each of those offers a different perception of the spatial phenomena under study. In this paper, we give an overview of existing modeling formalisms and discuss some ways of combining approaches to tackle the problem the computational costs induced by spatial dynamics.

关键词： biology computing cell biology cell dynamics cell simulation cellular biophysics computer graphics operational semantics physiological models simulation algorithm spatial dynamics spatial modeling

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Design of electronic circuits using a divide-and-conquer approach

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7th International Conference on Evolvable Systems

作者： He, Guoliang Li, Yuanxiang Yu, Li Zhang, Wei Tu, Hang Wuhan Univ State Key Lab Software Engn Wuhan 430072 Peoples R China

ISBN: (纸本)9783540746256

Automatic design of electronic logic circuits has become a new research focus with the cooperation of FPGA technology and intelligent algorithms in recent twenty years. However, as the size of logic circuits became larger and more complex, it has become difficult for the automatic design method to obtain valid and optimized circuits. Based on a divide-and-conquer approach, a two-layer encoding scheme was devised for design of electronic logic circuits. In the process of evolvement, each layer was evolved parallel and they contacted each other at the same time. Moreover, in order to simulate and evaluate evolved electronic logic circuits, a two-step simulation algorithm was proposed to reduce pp computation complexity of simulating circuits and to improve the simulation efficiency. At last, a random number generator was automatically designed with this encoding scheme and the proposed simulation algorithm, and the result showed this method was efficient.

关键词： evolvable hardware divide-and-conquer approach simulation algorithm

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