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Extension of the distributed point source method for ultrasonic field modeling. [PDF]
Ultrasonics, 2011 The distributed point source method (DPSM) was recently proposed for ultrasonic field modeling and other applications. This method uses distributed point sources, placed slightly behind transducer surface, to model the ultrasound field. The acoustic strength of each point source is obtained through matrix inversion that requires the number of target ...
Cheng J, Lin W, Qin YX.
europepmc +4 more sources
A Bayesian method for point source polarisation estimation [PDF]
Astronomy & Astrophysics, 2021 The estimation of the polarisation P of extragalactic compact sources in cosmic microwave background (CMB) images is a very important task in order to clean these images for cosmological purposes –for example, to constrain the tensor-to-scalar ratio of primordial fluctuations during inflation– and also to obtain relevant astrophysical information about
Herranz Muñoz, Diego +4 more
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Prediction Model of Agricultural Non-point Source Water Pollution Based on Grey Correlation Method [PDF]
Nature Environment and Pollution Technology, 2021 Accurate prediction of non-point source water pollution is conducive to the prevention and control of rural water pollution. To improve the prediction accuracy of agricultural non-point source water pollution and achieve timely prevention and control, a ...
R. Wang, F. X. Yang and G. M. Qu
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IEEE Photonics Journal, 2022 An optimization algorithm for phase-only hologram (POH) based on the point source method (PSM) with the holographic viewing-window (HVW) by using a convolutional neural network (CNN) is proposed.
Yun Chen +4 more
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Improved On-Orbit MTF Measurement Method Based on Point Source Arrays
Remote Sensing, 2023 The modulation transfer function (MTF) is a key characteristic used to assess the performance of optical remote sensing satellite sensors. MTF detection can directly measure a sensor’s two-dimensional (2D) point spread function (PSF); therefore, it has ...
Litao Li +4 more
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Initial On-Orbit Modulation Transfer Function Performance Analysis for Geostationary Ocean Color Imager [PDF]
Journal of Astronomy and Space Sciences, 2012 The world’s first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140 mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and ...
Eunsong Oh +4 more
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A Practical Method for Estimation of Point Light-Sources [PDF]
Procedings of the British Machine Vision Conference 2001, 2001 We introduce a general model for point light-sources and show how the parameters of a source at finite distance can be estimated by shading on an object with known geometry and Lambertian reflectance. The parameters we estimate include not only the direction but also the location of the source.
Martin Weber 0001, Roberto Cipolla
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A Point Crack Source Location Method without Velocity Information in Anisotropic Plates
Applied Sciences, 2022 Locating cracks in a solid object using acoustic emission (AE) is useful both for detecting defects during safety monitoring and for basic laboratory studies of fractures.
Dong Geon Lim +3 more
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Reproductive Health, 2023 Background Many factors influence young women’s choice of contraceptive methods and where to source them, yet less is known about whether one of these choices (method or source) is prioritized and the relationship between these choices.
Lisa M. Calhoun +9 more
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Advance detection technology of three-point source DC method based on COMSOL
Meikuang Anquan, 2023 When the traditional single point power supply electrode DC advance detection technology is used to detect the long-distance anomaly, the signal gradually weakens and the accuracy greatly decreases with the increase of detection distance.
GAO Weifu, WANG Kewei, HU Anshun, WANG Naijun
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