Journal of Quantitative Spectroscopy & Radiative Transfer最新文献

GAAS: GPU accelerated absorption simulator GAAS： GPU 加速吸收模拟器

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-07 DOI: 10.1016/j.jqsrt.2024.109307

Charles S. Callahan, Sean M. Bresler, Sean C. Coburn, David A. Long, Gregory B. Rieker

{"title":"GAAS: GPU accelerated absorption simulator","authors":"Charles S. Callahan, Sean M. Bresler, Sean C. Coburn, David A. Long, Gregory B. Rieker","doi":"10.1016/j.jqsrt.2024.109307","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2024.109307","url":null,"abstract":"Interpreting measured absorption spectroscopy data can require repeated simulations of the expected absorption spectrum to fit the data. In cases of high temperature or broadband spectra, the computational load of the spectral analysis can be expensive due to the large number of individual absorption transitions that contribute to each simulation. We present a Graphics Processing Unit (GPU) Accelerated Absorption Simulator (GAAS) – a fast, hardware-accelerated, line-by-line absorption simulation software for generating absorption spectra based on Voigt and Hartmann-Tran lineshape profiles. We show that GAAS produces the same output spectra as the <ce:italic>hi</ce:italic>gh-resolution <ce:italic>trans</ce:italic>mission molecular absorption database (HITRAN) Application Programming Interface (HAPI) to within 32-bits of numerical precision for spectra based on both Voigt and Hartmann-Tran profiles. We also measure the performance increase compared to HAPI and demonstrate that GAAS can reduce simulation time by up to 115x for spectra containing many (several thousand or more) absorption transitions. The software is provided as an open-source python library which is built around an OpenCL implementation of the Voigt and Hartmann-Tran lineshape functions. GAAS can be run on a variety of GPU hardware including integrated GPUs on most computers and high-performance external GPUs. It is installed as a standalone Python library, making it accessible and easy to use for many applications. GAAS will enable researchers to more efficiently analyze complex spectra, especially using advanced lineshapes, to ultimately increase the accuracy of complex spectroscopic measurements.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"134 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transmittance of Gaussian beams in biological tissues 生物组织中高斯光束的透射率

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-06 DOI: 10.1016/j.jqsrt.2024.109312

Murat Kaan Özcan, Muhsin Caner Gökçe, Yahya Baykal

引用次数: 0

Inversion of optical constants of natural silk fibers based on FDTD-PSO and scattering experiments 基于 FDTD-PSO 和散射实验的天然丝纤维光学常数反演

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-05 DOI: 10.1016/j.jqsrt.2024.109314

Zhengwei Tao, Jun Qiu

{"title":"Inversion of optical constants of natural silk fibers based on FDTD-PSO and scattering experiments","authors":"Zhengwei Tao, Jun Qiu","doi":"10.1016/j.jqsrt.2024.109314","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2024.109314","url":null,"abstract":"The optical constants of fiber materials are of great value in the study of the mechanism and application of radiation regulation, but the conventional methods for obtaining the optical constants of fiber materials suffer from a series of problems such as compositional differences, chemical residues, and microstructural damages, which make it difficult to obtain the optical constants of the fiber materials and make the final results of the measurements doubtful. In this work, a new intelligent inversion method is developed, based on the first-principles calculations of electromagnetic scattering using Finite Difference Time Domain method and particle swarm optimization algorithm (FDTD-PSO), to obtain the optical constants of fibers through the measurement of the scattered radiation properties of fiber materials and the characterization of their surface microstructures. The feasibility and accuracy of the method are demonstrated by theoretical numerical calculation simulations of different kinds of fibers, and the scale effect and error are analyzed from three aspects, namely, scale parameters, roughness and incident light angle direction. The results show that the dimensions, roughness and incident wavelength of the fiber material are in the sub-wavelength scale interval, which requires high model accuracy and gives the appropriate inversion range interval. Finally, the method is experimentally validated by using the natural silk fibers. This work constructs a complete set of theoretical models and experimental methods to accurately obtain the optical constants of actual fiber materials, which provides a new direction for obtaining the optical constants of fiber materials and a numerical basis for the study of the radiation modulation mechanism of fiber materials.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"15 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The tenth international symposium on radiative transfer (RAD-23)

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-05 DOI: 10.1016/j.jqsrt.2024.109276

Dr. Denis Lemonnier, Prof. Brent W. Webb, Prof. Dr. M.Pınar Mengüç

引用次数: 0

Effects of oceanic turbulence on a multi-cosine-Lorentz correlated beam

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-05 DOI: 10.1016/j.jqsrt.2024.109313

Peiying Zhu, Dajun Liu, Yan Yin, Haiyang Zhong, Yaochuan Wang, Guiqiu Wang

引用次数: 0

Corrigendum to “Combined stochastic and transfer model for atmospheric radiation” [Journal of Quantitative Spectroscopy and Radiative Transfer 73 (2002) 249–259]

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-11-30 DOI: 10.1016/j.jqsrt.2024.109293

S.B. Beale

引用次数: 0

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-11-28 DOI: 10.1016/j.jqsrt.2024.109291

Knut Stamnes

引用次数: 0

Electrostatic boundary problems and T-matrix for the dielectric half-spheroid

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-11-28 DOI: 10.1016/j.jqsrt.2024.109289

Matt Majic , Johan C.-E. Stén

引用次数: 0

Research on underwater polarization distribution reconstruction method for partial occlusion environment

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-11-28 DOI: 10.1016/j.jqsrt.2024.109288

Ying Ma, Fang Kong, Yinjing Guo, Yaohuang Ruan, Chunxiao Du, Xiaohan Guo, Di Zhang

{"title":"Research on underwater polarization distribution reconstruction method for partial occlusion environment","authors":"Ying Ma, Fang Kong, Yinjing Guo, Yaohuang Ruan, Chunxiao Du, Xiaohan Guo, Di Zhang","doi":"10.1016/j.jqsrt.2024.109288","DOIUrl":"https://doi.org/10.1016/j.jqsrt.2024.109288","url":null,"abstract":"Underwater polarization imaging technology has important application prospects in marine scientific research, seabed resource exploration, seabed topography drawing, underwater archaeology and other fields. However, underwater polarization images are subject to degradation in image quality during the acquisition process due to occlusion by water grass, fish, and the absorption of water particles in the ocean. In order to enhance the quality of polarization images and restore distorted information, In this paper, an underwater rotating polarization imaging detection system is designed, which can capture sky polarized light about 10 m in the ocean. At the same time, an image reconstruction algorithm based on intra-frame prediction is proposed. The algorithm utilizes the temporal and spatial correlations of the angle of polarization image sequence to reconstruct distorted the angle of polarization images by predicting the current frame. Specifically, the proposed algorithm uses the surrounding information to predict the angle of polarization image of the occlusion area, and optimizes it through SATD (Sum of Absolute Transformed Differences) to obtain a better prediction residual image. Finally, the prediction residual image is combined with the prediction results to obtain the final reconstructed the angle of polarization image to achieve the purpose of navigation. Simulation and experimental results show that the proposed algorithm can adapt to partially occluded visual field environment, remove random occlusion and restore image detail information. Compared with the image before repair, the image information after repair is improved by about 65 %.","PeriodicalId":16935,"journal":{"name":"Journal of Quantitative Spectroscopy & Radiative Transfer","volume":"140 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On radial quadrature method applied to spherical wave expansion of Gaussian beams 应用于高斯光束球面波展开的径向正交法

IF 2.3 3区物理与天体物理

Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-11-23 DOI: 10.1016/j.jqsrt.2024.109290

Siqi Tang , Jianqi Shen , Gérard Gouesbet , Leonardo A. Ambrosio

引用次数: 0