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Journal articles on the topic 'Angular spectrum method'

Author: Grafiati

Published: 6 September 2023

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1

Shimobaba, Tomoyoshi, Kyoji Matsushima, Takashi Kakue, Nobuyuki Masuda, and Tomoyoshi Ito. "Scaled angular spectrum method." Optics Letters 37, no. 19 (2012): 4128. http://dx.doi.org/10.1364/ol.37.004128.

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2

Wu, Sheng Jiang, Dang Juan Li, and Jin Jun Lu. "A New Method to Measure the Transmittance of Filter." Advanced Materials Research 383-390 (November 2011): 5309–14. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5309.

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Based on the theory of Fabry-Perot interference, we analyzed the inherent relationship between single-wavelength and the spectrometry, established the mathematical model of transformation from angular spectrum measurement to spectral measurement,realized the data conversion between angular spectrum measurement and spectrum measurement; build the experimental platform and got the laser's transmittance by changing the incidence angle of the laser, and given the comparison experiment by using spectrophotometer, measured the spectral transmittance of filters. Comparison of the two measurement, the

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3

Schafer, Mark E., and Peter A. Lewin. "Transducer characterization using the angular spectrum method." Journal of the Acoustical Society of America 85, no. 5 (1989): 2202–14. http://dx.doi.org/10.1121/1.397869.

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4

Schafer, M. E., and P. A. Lewin. "Transducer characterization using the angular spectrum method." NDT & E International 25, no. 3 (1992): 152. http://dx.doi.org/10.1016/0963-8695(92)90423-e.

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5

Yan Zhao, Yan Zhao, Liangcai Cao Liangcai Cao, Hao Zhang Hao Zhang, et al. "Time-division multiplexing holographic display using angular-spectrum layer-oriented method (Invited Paper)." Chinese Optics Letters 14, no. 1 (2016): 010005–10009. http://dx.doi.org/10.3788/col201614.010005.

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6

Peng, Bofang, Qixin Xu, and Wenmei Hou. "A novel overlay metrology method: Simultaneous utilizing spectral and angular spectrum." Optik 169 (September 2018): 228–35. http://dx.doi.org/10.1016/j.ijleo.2018.05.024.

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7

Arvanitis, Costas D., Calum Crake, Nathan McDannold, and Gregory T. Clement. "Passive Acoustic Mapping with the Angular Spectrum Method." IEEE Transactions on Medical Imaging 36, no. 4 (2017): 983–93. http://dx.doi.org/10.1109/tmi.2016.2643565.

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8

Hwang, Chi-Young, Seungtaik Oh, Il-Kwon Jeong, and Hwi Kim. "Stepwise angular spectrum method for curved surface diffraction." Optics Express 22, no. 10 (2014): 12659. http://dx.doi.org/10.1364/oe.22.012659.

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9

Cheng, Qiu-Hu, Shi-Yu Wang, Meng-Yao Wu, Zhen Guo, De-Fang Cai, and Bing-Bin Li. "Nonuniform sampled angular spectrum method by using trigonometric interpolation." Chinese Physics B 27, no. 9 (2018): 094203. http://dx.doi.org/10.1088/1674-1056/27/9/094203.

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10

Kim, Yong-Hae, Chun-Won Byun, Himchan Oh, et al. "Non-uniform sampling and wide range angular spectrum method." Journal of Optics 16, no. 12 (2014): 125710. http://dx.doi.org/10.1088/2040-8978/16/12/125710.

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11

Matsushima, Kyoji. "Shifted angular spectrum method for off-axis numerical propagation." Optics Express 18, no. 17 (2010): 18453. http://dx.doi.org/10.1364/oe.18.018453.

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12

Kim, Yong-Hae, Chun-Won Byun, Himchan Oh, et al. "Off-axis angular spectrum method with variable sampling interval." Optics Communications 348 (August 2015): 31–37. http://dx.doi.org/10.1016/j.optcom.2015.03.013.

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13

Grachev, Vladimir, Aleksandr Grischenko, Fedor Bazilevskiy, and Maksim Panchenko. "Method for Equalization of Cylinder Powers of Multi-Cylinder Locomotive Diesel." Bulletin of scientific research results 2022, no. 3 (2022): 103–17. http://dx.doi.org/10.20295/2223-9987-2022-3-103-117.

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Purpose: Labor intensity reduction and equalization accuracy improvement of cylinder powers of a multi-cylinder diesel locomotive on account of application as a diagnostic parameter, characterizing cylinder power unevenness, — the energy of low-frequency band of spectrum for crankshaft instantaneous angular velocity (CIAV) signal. Methods: Methods of mathematical modeling of diesel crankshaft instantaneous angular velocity, mathematical modeling of diesel engine working process, digital signal processing, spectral analysis, differential calculus and multidimensional non-differentiable function

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14

Schoen, Scott, and Costas D. Arvanitis. "Heterogeneous Angular Spectrum Method for Trans-Skull Imaging and Focusing." IEEE Transactions on Medical Imaging 39, no. 5 (2020): 1605–14. http://dx.doi.org/10.1109/tmi.2019.2953872.

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15

Schoen, Scott J., and Costas Arvanitis. "Heterogeneous angular spectrum method for trans-skull imaging and focusing." Journal of the Acoustical Society of America 146, no. 4 (2019): 2813. http://dx.doi.org/10.1121/1.5136742.

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16

Schafer, M. E. "Transducer characterization in inhomogeneous media using the angular spectrum method." NDT & E International 25, no. 3 (1992): 153. http://dx.doi.org/10.1016/0963-8695(92)90434-i.

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17

Lu, Chenxiang, Xiangyang Zeng, Qiang Wang, Lu Wang, and Anqi Jin. "Array-Based Underwater Acoustic Target Classification with Spectrum Reconstruction Based on Joint Sparsity and Frequency Shift Invariant Feature." Journal of Marine Science and Engineering 11, no. 6 (2023): 1101. http://dx.doi.org/10.3390/jmse11061101.

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The target spectrum, which is commonly used in feature extraction for underwater acoustic target classification, can be improperly recovered via conventional beamformer (CBF) owing to its frequency-variant spatial response and lead to degraded classification performance. In this paper, we propose a target spectrum reconstruction method under a sparse Bayesian learning framework with joint sparsity priors that can not only achieve high-resolution target separation in the angular domain but also attain beamwidth constancy over a frequency range at no cost of reducing angular resolution. Experime

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18

Ali, Rehman, and Jeremy Dahl. "Angular spectrum method for curvilinear arrays: Theory and application to Fourier beamforming." JASA Express Letters 2, no. 5 (2022): 052001. http://dx.doi.org/10.1121/10.0010536.

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Fourier beamforming techniques for medical ultrasound imaging have largely been limited to linear transducer arrays. This work extends the angular spectrum method to curvilinear arrays and demonstrates a migration-based Fourier beamforming technique that has implications for sound speed estimation and distributed aberration correction for abdominal imaging applications. When compared to Field II simulations, the proposed angular spectrum method simulates the pressure field from a focused transmission to within 3.7% normalized root mean square error. The resulting Fourier beamforming technique

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19

Sudevan, Vipin, Ujjal Purkayastha, and Rajib Saha. "A Partial-sky Gibbs ILC Approach for the Estimation of CMB Posterior over Large Angular Scales of the Sky." Astrophysical Journal 936, no. 2 (2022): 106. http://dx.doi.org/10.3847/1538-4357/ac8105.

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Abstract In this article we present a formalism for incorporating the partial-sky maps into the Gibbs ILC algorithm to estimate the joint posterior density of the cosmic microwave background (CMB) signal and the theoretical CMB angular power spectrum given the observed CMB maps. In order to generate the partial-sky maps, we mask all the observed CMB maps provided by the WMAP and Planck satellite full-sky mission using a mask that removes 22% of the entire sky. The mask we use is based on the strength of the thermal dust emissions in the Planck 353 GHz map. While implementing the Gibbs ILC meth

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20

Makarov, Denis V., and Leonid E. Kon’kov. "Angular Spectrum of Acoustic Pulses at Long Ranges." Journal of Marine Science and Engineering 11, no. 1 (2022): 29. http://dx.doi.org/10.3390/jmse11010029.

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Long-range propagation of sound pulses in the deep ocean is considered. A new method for the estimation of the pulse angular spectrum is presented. The method is based on the Husimi transform of a wave field and can be realized with a short vertical array of nondirectional hydrophones. As a result, one obtains a diagram of the arrival pattern in the time–angle plane. The method is applied to a model of the underwater sound channel in the Sea of Japan. Special attention is paid to sound scattering on a cold synoptic eddy along the waveguide. It is shown that the synoptic eddy leads to a splitti

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21

Yatsishen, Valeriy V. "Nanoplasmonic methods in angular spectroscopy of nanoscale biological objects." Physics of Wave Processes and Radio Systems 23, no. 4 (2021): 111–15. http://dx.doi.org/10.18469/1810-3189.2020.23.4.111-115.

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The paper presents the results of calculating the angular spectra of light reflection under the condition of excitation of surface plasmons in the Kretschman scheme. The silver layer in this scheme plays the role of a reference material, the minimum in the angular spectrum of which serves as a reference point for the shift of the minimum of the angular spectrum when a layer of the studied biological material is added to the considered layered system, which were melanin and biological tissue. As a result of the work, specific pronounced minima in the angular spectra were obtained, which make it

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22

Leung, J. S. Y., J. Hartley, J. M. Nagy, et al. "A Simulation-based Method for Correcting Mode Coupling in CMB Angular Power Spectra." Astrophysical Journal 928, no. 2 (2022): 109. http://dx.doi.org/10.3847/1538-4357/ac562f.

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Abstract Modern cosmic microwave background (CMB) analysis pipelines regularly employ complex time-domain filters, beam models, masking, and other techniques during the production of sky maps and their corresponding angular power spectra. However, these processes can generate couplings between multipoles from the same spectrum and from different spectra, in addition to the typical power attenuation. Within the context of pseudo-C ℓ based, MASTER-style analyses, the net effect of the time-domain filtering is commonly approximated by a multiplicative transfer function, F ℓ , that can fail to cap

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23

Wang, Wantian, Jiahao Zhang, Hao Wu, and Jin Meng. "An Adaptive and Accurate Method for Rotational Angular Velocity Estimation of Rotor Targets via Fourier Coefficient Interpolation." Remote Sensing 14, no. 17 (2022): 4342. http://dx.doi.org/10.3390/rs14174342.

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As a special micro-motion feature of rotor targets, rotational angular velocity can provide a discriminant basis for target classification and recognition. In this paper, an adaptive and accurate method is proposed for estimating the rotational angular velocity of rotor targets via a Fourier coefficient interpolation algorithm that is based on modified frequency index residue initialization. The negative frequency complex exponential signal component is removed at each iteration to eliminate the estimation bias caused by spectrum superposition and improve the estimation accuracy. The frequency

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24

Fang, Yuzhuo, and Zhiyong Xu. "Multiple Sound Source Localization and Counting Using One Pair of Microphones in Noisy and Reverberant Environments." Mathematical Problems in Engineering 2020 (September 7, 2020): 1–12. http://dx.doi.org/10.1155/2020/8937829.

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A multiple sound source localization and counting method based on an angular spectrum is proposed in this paper. Local signal-to-noise ratio tracking, onset detection, and a coherence test are introduced to filter the generalized cross-correlation angular spectrum in the time-frequency domain for multiple sound source localization and counting in noisy and reverberant environments. Then, dual-width matching pursuit is introduced to replace peak search as the method of localization and counting. A comprehensive comparison of two statistical indicators, mean precision and mean absolute estimated

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25

Zhang Xusheng, 张旭升, 何川 He Chuan, and 撖芃芃 Han Pengpeng. "Intensity Distribution Analysis of Axicon Lens by Numerical Angular Spectrum Method." Acta Optica Sinica 32, no. 12 (2012): 1207001. http://dx.doi.org/10.3788/aos201232.1207001.

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26

Zhang, Wenhui, Hao Zhang, Kyoji Matsushima, and Guofan Jin. "Shifted band-extended angular spectrum method for off-axis diffraction calculation." Optics Express 29, no. 7 (2021): 10089. http://dx.doi.org/10.1364/oe.419096.

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27

He, Zehao, Xiaomeng Sui, Guofan Jin, and Liangcai Cao. "Distortion-Correction Method Based on Angular Spectrum Algorithm for Holographic Display." IEEE Transactions on Industrial Informatics 15, no. 11 (2019): 6162–69. http://dx.doi.org/10.1109/tii.2019.2906642.

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28

Lewin, Peter A., and Mark E. Schafer. "Characterization of the surface velocity distribution using the angular spectrum method." Journal of the Acoustical Society of America 88, S1 (1990): S172. http://dx.doi.org/10.1121/1.2028763.

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29

Vecchio, Christopher J., and Peter A. Lewin. "Finite amplitude acoustic propagation modeling using the extended angular spectrum method." Journal of the Acoustical Society of America 95, no. 5 (1994): 2399–408. http://dx.doi.org/10.1121/1.409849.

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30

Xu, Rui, Ming Feng, Ziyu Chen, et al. "Non-uniform angular spectrum method in a complex medium based on iteration." Optics Letters 47, no. 8 (2022): 1972. http://dx.doi.org/10.1364/ol.454171.

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31

Fung, Clement C. W., Richard S. C. Cobbold, and Peter A. J. Bascom. "Radiation coupling of a transducer–target system using the angular spectrum method." Journal of the Acoustical Society of America 92, no. 4 (1992): 2239–47. http://dx.doi.org/10.1121/1.405218.

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32

Zhao, Wanli, Chenlu Wei, Caojin Yuan, Chenliang Chang, Jun Ma, and Rihong Zhu. "A flexible numerical calculation method of angular spectrum based on matrix product." Optics Letters 45, no. 21 (2020): 5937. http://dx.doi.org/10.1364/ol.405257.

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33

Zhao, Yan, Liangcai Cao, Hao Zhang, Dezhao Kong, and Guofan Jin. "Accurate calculation of computer-generated holograms using angular-spectrum layer-oriented method." Optics Express 23, no. 20 (2015): 25440. http://dx.doi.org/10.1364/oe.23.025440.

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34

Li, Yuanyang, Jin Guo, Lisheng Liu, Tingfeng Wang, and Junfeng Shao. "Wide-window angular spectrum method for optical field propagation through ABCD systems." Journal of Modern Optics 61, no. 18 (2014): 1519–28. http://dx.doi.org/10.1080/09500340.2014.944232.

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35

Kozacki, Tomasz, and Konstantinos Falaggis. "Angular spectrum method with compact space–bandwidth: generalization and full-field accuracy." Applied Optics 55, no. 19 (2016): 5014. http://dx.doi.org/10.1364/ao.55.005014.

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36

Belgroune, D., J. F. de Belleval, and H. Djelouah. "Angular Spectrum Method for the Focused Acoustic Field of a Linear Transducer." Physics Procedia 70 (2015): 231–35. http://dx.doi.org/10.1016/j.phpro.2015.08.143.

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37

Secada, José D. "Transient radiation field of annular-sectorial planar pistons: The Angular Spectrum method." Wave Motion 44, no. 1 (2006): 1–20. http://dx.doi.org/10.1016/j.wavemoti.2006.06.004.

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38

Zhang, Wenhui, Hao Zhang, and Guofan Jin. "Adaptive-sampling angular spectrum method with full utilization of space-bandwidth product." Optics Letters 45, no. 16 (2020): 4416. http://dx.doi.org/10.1364/ol.393111.

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39

Umiltà, C., J. F. Cardoso, K. Benabed, and M. Le Jeune. "The CMB angular power spectrum via component separation: a study on Planck data." Astronomy & Astrophysics 624 (April 2019): A67. http://dx.doi.org/10.1051/0004-6361/201833758.

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Aims. We investigate the extent to which foreground-cleaned cosmic microwave background (CMB) maps can be used to estimate cosmological parameters at small scales. Methods. We use the SMICA method, a blind separation technique that works directly at the spectral level. In this work we focus on the small scales of the CMB angular power spectrum, which are chiefly affected by noise and extragalactic foregrounds, such as point sources. We adapt SMICA to use only cross-spectra between data maps, thus avoiding the noise bias. In this study, performed using both simulations and Planck 2015 data, we

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40

Grachev, Vladimir, Aleksandr Grischenko, Fedor Bazilevskiy, and Maksim Panchenko. "Experimental Verification of Equalization Method for the Outputs of Multi-Cylinder Diesel Engine Cylinders." Bulletin of scientific research results 2022, no. 4 (2022): 24–36. http://dx.doi.org/10.20295/2223-9987-2022-4-24-36.

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Purpose: The purpose of the present work is to test experimentally equalization method for the outputs of multi-cylinder diesel engine cylinders basing on energy minimization of amplitude spectrum low-frequency band for diesel crankshaft instantaneous angular speed signal. Methods: The work uses the methods of digital signal processing, spectral analysis, differential calculus, multidimensional undifferentiated function optimization, experimental results processing. Results: The fulfilled experimental studies at bench diesel generator device as a part of locomotive diesel D50 (6CHN31.8/33) and

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41

Konstantinovich, I. A., and A. V. Konstantinovich. "Radiation Spectrum of Sequence of Electrons Moving in Spiral in Medium." Фізика і хімія твердого тіла 20, no. 1 (2019): 5–12. http://dx.doi.org/10.15330/pcss.20.1.12.

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Integral expressions for spectral-angular and spectral distributions of the radiation power for the sequence of electrons moving in magnetic fields in isotropic transparent medium are investigated using the improved Lorentz`s self-interaction method. Special attention is given to the research of the fine structurre of the spectral distribution of the synchrotron-Cherenkov radiation of one, two, three and four point electrons moving along the spiral in medium. The effects of coherent radiation of harmonics and oscillations in spectrum of the synchrotron-Cherenkov radiation of two, three and fou

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42

Vyas, Urvi, and Douglas Christensen. "Ultrasound beam simulations in inhomogeneous tissue geometries using the hybrid angular spectrum method." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 59, no. 6 (2012): 1093–100. http://dx.doi.org/10.1109/tuffc.2012.2300.

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43

Zhang, Xiao-Zheng, Chuan-Xing Bi, Yong-Bin Zhang, and Liang Xu. "Reconstruction of nonstationary sound fields based on a time domain angular spectrum method." Journal of the Acoustical Society of America 148, no. 4 (2020): 2123–36. http://dx.doi.org/10.1121/10.0002263.

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44

Ritter, André. "Modified shifted angular spectrum method for numerical propagation at reduced spatial sampling rates." Optics Express 22, no. 21 (2014): 26265. http://dx.doi.org/10.1364/oe.22.026265.

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45

Ebers, Lena, Manfred Hammer, and Jens Förstner. "Light diffraction in slab waveguide lenses simulated with the stepwise angular spectrum method." Optics Express 28, no. 24 (2020): 36361. http://dx.doi.org/10.1364/oe.409612.

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46

Pees, Edward H. "A radial propagator for computing axisymmetric pressure fields using the angular spectrum method." Journal of the Acoustical Society of America 126, no. 4 (2009): 2197. http://dx.doi.org/10.1121/1.3248593.

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47

Yu, Xiao, Tang Xiahui, Qin Ying xiong, Peng Hao, and Wang Wei. "Wide-window angular spectrum method for diffraction propagation in far and near field." Optics Letters 37, no. 23 (2012): 4943. http://dx.doi.org/10.1364/ol.37.004943.

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48

Suh, Kyung Duck, Robert A. Dalrymple, and James T. Kirby. "An angular spectrum model for propagation of Stokes waves." Journal of Fluid Mechanics 221 (December 1990): 205–32. http://dx.doi.org/10.1017/s0022112090003548.

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An angular spectrum model for predicting the transformation of Stokes waves on a mildly varying topography is developed, including refraction, diffraction, shoaling and nonlinear wave interactions. The equations governing the water-wave motion are perturbed using the method of multiple scales and Stokes expansions for the velocity potential and free-surface displacement. The first-order solution is expressed as an angular spectrum, or directional modes, of the wave field propagating on a beach with straight iso-baths whose depth is given by laterally averaged depths. The equations for the evol

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49

Carrion, Philip M., Selma dos S. Sacramento, and Reynam da C. Pestana. "Source wavelet and its angular spectrum from plan‐wave seismograms." GEOPHYSICS 55, no. 8 (1990): 1026–35. http://dx.doi.org/10.1190/1.1442915.

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In a typical seismic experiment (land or marine), the generated source wavelet is either unknown, or known only approximately. In order to solve many geophysical problems, an accurate wavelet estimation is crucial. This paper demonstrates a fast numerical algorithm which allows not only estimating the source wavelet but also its angular spectrum (radiation pattern) from plane‐wave decomposed seismograms. Surprisingly, literature on this subject is virtually missing, although a nonuniform angular spectrum of the generated wavelet can substantially affect the recorded data. The technique present

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50

VALENCIA, ALEJANDRA, MARTIN HENDRYCH, XIAOJUAN SHI, and JUAN P. TORRES. "ANGULAR DISPERSION IN SPONTANEOUS PARAMETRIC DOWN CONVERSION: A TOOL TO GENERATE NARROW TEMPORAL BIPHOTONS AND PURE HERALDED SINGLE PHOTONS." International Journal of Quantum Information 07, supp01 (2009): 9–15. http://dx.doi.org/10.1142/s0219749909004906.

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In this paper, we describe how introducing angular dispersion into the pump beam and the downconverted photons in spontaneous parametric downconversion allows us to manipulate the joint spectrum of the paired photons. In particular, when collinear geometries are used, we demonstrate an increase of the photons' bandwidth and discuss the implications of this method for the generation of narrow temporal Fourier transform limited biphotons. Additionally, we describe the situation in which angular dispersion is combined with noncollinear geometries. In this case, a full control of the joint spectru

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