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Journal articles on the topic 'Multi-angular'

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Author: Grafiati

Published: 4 June 2021

Last updated: 10 March 2023

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1

Liu, Deyang, Yan Huang, Qiang Wu, Ran Ma, and Ping An. "Multi-Angular Epipolar Geometry Based Light Field Angular Reconstruction Network." IEEE Transactions on Computational Imaging 6 (2020): 1507–22. http://dx.doi.org/10.1109/tci.2020.3037413.

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2

Thylwe, Karl-Erik. "Multi-state complex angular momentum residues." Journal of Physics A: Mathematical and General 39, no. 38 (September 5, 2006): 11895–99. http://dx.doi.org/10.1088/0305-4470/39/38/015.

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3

Sharma, Ram C. "Vegetation Structure Index (VSI): Retrieving Vegetation Structural Information from Multi-Angular Satellite Remote Sensing." Journal of Imaging 7, no. 5 (May 9, 2021): 84. http://dx.doi.org/10.3390/jimaging7050084.

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Utilization of the Bidirectional Reflectance Distribution Function (BRDF) model parameters obtained from the multi-angular remote sensing is one of the approaches for the retrieval of vegetation structural information. In this research, the potential of multi-angular vegetation indices, formulated by the combination of multi-spectral reflectance from different view angles, for the retrieval of forest above-ground biomass was assessed in the New England region. The multi-angular vegetation indices were generated by the simulation of the Moderate Resolution Imaging Spectroradiometer (MODIS) BRDF/Albedo Model Parameters Product (MCD43A1 Version 6)-based BRDF parameters. The effects of the seasonal (spring, summer, autumn, and winter) composites of the multi-angular vegetation indices on the above-ground biomass, the angular relationship of the spectral reflectance with above-ground biomass, and the interrelationships between the multi-angular vegetation indices were analyzed. Among the existing multi-angular vegetation indices, only the Nadir BRDF-adjusted NDVI and Hot-spot incorporated NDVI showed significant relationship (more than 50%) with the above-ground biomass. The Vegetation Structure Index (VSI), newly proposed in the research, performed in the most efficient way and explained 64% variation of the above-ground biomass, suggesting that the right choice of the spectral channel and observation geometry should be considered for improving the estimates of the above-ground biomass. In addition, the right choice of seasonal data (summer) was found to be important for estimating the forest biomass, while other seasonal data were either insensitive or pointless. The promising results shown by the VSI suggest that it could be an appropriate candidate for monitoring vegetation structure from the multi-angular satellite remote sensing.

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4

Liu, Zhao Yan, Ling Ling Ma, Ling Li Tang, and Yong Gang Qian. "LAI Retrieval Based on PROSPECT-SAILH Model from Multi-Angular Data of WiDAS Imaging System." Advanced Materials Research 518-523 (May 2012): 5697–703. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5697.

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The aim of this study is to assess the capability of estimating Leaf Area Index (LAI) from high spatial resolution multi-angular Vis-NIR remote sensing data of WiDAS (Wide-Angle Infrared Dual-mode Line/Area Array Scanner) imaging system by inverting the coupled radiative transfer models PROSPECT-SAILH. Based on simulations from SAILH canopy reflectance model and PROSPECT leaf optical properties model, a Look-up Table (LUT) which describes the relationship between multi-angular canopy reflectance and LAI has been produced. Then the LAI can be retrieved from LUT by directly matching canopy reflectance of six view directions and four spectral bands with LAI. The inversion results are validated by field data, and by comparing the retrieval results of single-angular remote sensing data with multi-angular remote sensing data, we can found that the view angle takes the obvious impact on the LAI retrieval of single-angular data and that high accurate LAI can be obtained from the high resolution multi-angular remote sensing technology.

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5

Christodoulidis, Perseas, Diederik Roest, and Evangelos I. Sfakianakis. "Angular inflation in multi-field α-attractors." Journal of Cosmology and Astroparticle Physics 2019, no. 11 (November 4, 2019): 002. http://dx.doi.org/10.1088/1475-7516/2019/11/002.

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6

Mozzhechkov, V. A. "Modular Multi-Turn Gear Angular Position Encoder." Measurement Techniques 62, no. 7 (October 2019): 608–14. http://dx.doi.org/10.1007/s11018-019-01667-1.

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7

Cheng Tian-Hai, Gu Xing-Fa, Chen Liang-Fu, Yu Tao, and Tian Guo-Liang. "Multi-angular polarized characteristics of cirrus clouds." Acta Physica Sinica 57, no. 8 (2008): 5323. http://dx.doi.org/10.7498/aps.57.5323.

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8

Seong, Woo-Jae. "Prediction and Characteristics of Angular Distortion in Multi-Layer Butt Welding." Materials 12, no. 9 (May 2, 2019): 1435. http://dx.doi.org/10.3390/ma12091435.

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Multi-layer welding involves the process of stacking many beads, so it requires much time and effort to predict the deformation through experimentation or numerical analysis. In this study, a systematic method for predicting transverse angular distortion in multi-layer butt welding has been proposed. First, the database was established through bead-on-plate welding experiments, which consisted of the relationship between welding conditions, the bead geometry, the material thickness, and the angular distortion. Then, when the arbitrary welding conditions and the shape of the butt joint were input, the method calculated the angular distortion per pass using the geometric principle and the database. The obtained prediction curves were verified with the V-groove welding experimental results. In addition, the characteristics of angular distortion in multi-layer butt welding were discussed. It was found that the angular distortion curve is a function of the number of passes and groove geometry. This algorithm is based on a numerical approach that saves computational time using databases and geometry, so it is suitable for industrial applications.

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9

Forsström, Petri R., Aarne Hovi, Giulia Ghielmetti, Michael E. Schaepman, and Miina Rautiainen. "Multi-angular reflectance spectra of small single trees." Remote Sensing of Environment 255 (March 2021): 112302. http://dx.doi.org/10.1016/j.rse.2021.112302.

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10

CHENG, Tian-Hai, Xing-Fa GU, Tao YU, Liang-Fu CHEN, and Guo-Liang TIAN. "MULTIANGULAR POLARIZED RADIATION CHARACTERISTICS OF WATER CLOUDS." JOURNAL OF INFRARED AND MILLIMETER WAVES 28, no. 4 (September 28, 2009): 267–71. http://dx.doi.org/10.3724/sp.j.1010.2009.00267.

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11

Kim, Y. H., X. Ma, Peter D. Hodgson, and Matthew R. Barnett. "Multi Equal Channel Angular Pressing with Rotational Dies." Materials Science Forum 426-432 (August 2003): 2777–82. http://dx.doi.org/10.4028/www.scientific.net/msf.426-432.2777.

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12

Rui, Guanghao, Yanbao Ma, Bing Gu, Qiwen Zhan, and Yiping Cui. "Multi-channel orbital angular momentum detection with metahologram." Optics Letters 41, no. 18 (September 15, 2016): 4379. http://dx.doi.org/10.1364/ol.41.004379.

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13

Smilga, Walter. "Orbital angular momentum in relativistic multi-particle systems." Journal of Physics: Conference Series 1194 (April 2019): 012100. http://dx.doi.org/10.1088/1742-6596/1194/1/012100.

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14

Carles, Guillem, Gonzalo Muyo, Nicholas Bustin, Andrew Wood, and Andrew R. Harvey. "Compact multi-aperture imaging with high angular resolution." Journal of the Optical Society of America A 32, no. 3 (February 11, 2015): 411. http://dx.doi.org/10.1364/josaa.32.000411.

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15

She, Feng, Hsiao Hwa Chen, and Hongyang Li. "Joint Angular and Time Diversity of Multi-Antenna CDMA Systems in Wireless Fading Channels." International Journal of Wireless Networks and Broadband Technologies 1, no. 1 (January 2011): 1–14. http://dx.doi.org/10.4018/ijwnbt.2011010101.

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In this paper, a multi-antenna based receiver structure for direct sequence code division multiple access (DS/CDMA) system is proposed. The proposed scheme exploits the excellent time resolution of a CDMA RAKE receiver and uses an antenna array beamforming structure to resolve multipath returns in both angular and time domains. A much higher diversity gain than that based only on the time domain diversity can be achieved. This work suggests a new space-time diversity paradigm, namely angular-time diversity, which differs from traditional Alamouti-type space-time coded schemes. The impairments caused by multipath and multiuser interference are analyzed. The performance of the proposed receiver in multipath fading channel is explicitly evaluated. An expression for uncoded system bit error probability is derived. Simulation results show the performance improvement in terms of BER due to the use of multi-antenna in the receiver, and the results illustrate that the multi-antenna based receiver works effectively in resolving multipaths in both angular and time domains to achieve performance improvement due to angular and time diversity gain provided by the multi-antenna system.

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16

Li, Jiu-Sheng, and Jun-Zhao Chen. "Multi-beam and multi-mode orbital angular momentum by utilizing a single metasurface." Optics Express 29, no. 17 (August 9, 2021): 27332. http://dx.doi.org/10.1364/oe.434206.

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17

Shuhui Li and Jian Wang. "Multi-Orbital-Angular-Momentum Multi-Ring Fiber for High-Density Space-Division Multiplexing." IEEE Photonics Journal 5, no. 5 (October 2013): 7101007. http://dx.doi.org/10.1109/jphot.2013.2272778.

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18

Barot, R. P., and D. M. Patel. "Design and analysis of multi-angular gearless transmission system." IOP Conference Series: Materials Science and Engineering 872 (June 27, 2020): 012096. http://dx.doi.org/10.1088/1757-899x/872/1/012096.

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19

Fassnachta, F., and B. Koch. "Review of forestry oriented multi-angular remote sensing techniques." International Forestry Review 14, no. 3 (September 1, 2012): 285–98. http://dx.doi.org/10.1505/146554812802646602.

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20

Qin, Huawang, and Raylin Tso. "High-capacity quantum secret sharing based on orbital angular momentum." Quantum Information and Computation 18, no. 7&8 (June 2018): 579–91. http://dx.doi.org/10.26421/qic18.7-8-3.

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A high-capacity quantum secret sharing scheme based on orbital angular momentum is proposed. The dealer uses single particles in the orbital angular momentum (OAM) basis to bring the secret and encodes the secret through performing the transformation between the orbital angular momentum (OAM) basis and the angular position (ANG) basis. In the recovery, the participants perform the single-particle measurements to reconstruct the secret. The proposed scheme can use the multi-dimension of OAM to reach higher information capacity and enhanced security.

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21

Xue, Zi, Yao Huang, Heyan Wang, and Hu Lin. "Calibration of Invar Angular Interferometer Optics with Multi-Step Method." International Journal of Automation Technology 9, no. 5 (September 5, 2015): 502–7. http://dx.doi.org/10.20965/ijat.2015.p0502.

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At the National Institute of Metrology (NIM), China, the Small Angle Measuring System, which is based on the sine principle, was developed as the national primary standard for the plane angle in an angular measuring range of ±5°. The measurement uncertainty of this system is dominated by the accuracy of an invar angular interferometer optical system. To calibrate this angle interferometer system, a series of known reference standards were generated with a multi-step method using a double-deck rotary table. The measurement uncertainty of the calibration is estimated to be approximately 0.05'' (k=2).

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22

Zhang, Min, Ruiqi Wang, Zhenyu Cai, and Wenming Cheng. "Phase partition and identification based on kernel entropy component analysis and multi-class support vector machines-fireworks algorithm for multi-phase batch process fault diagnosis." Transactions of the Institute of Measurement and Control 42, no. 12 (March 24, 2020): 2324–37. http://dx.doi.org/10.1177/0142331220910885.

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For the characteristics of nonlinear and multi-phase in the batch process, a self-adaptive multi-phase batch process fault diagnosis method is proposed in this paper. Firstly, kernel entropy component analysis (KECA) method is used to achieve multi-phase partition adaptively, which makes the process data mapped into the high-dimensional feature space and then constructs the core entropy and the angular structure similarity. Then a multi-phase KECA failure monitoring model is developed by using the angular structure similarity as the statistic, which is based on the partitioned phases and the effective failure features by the KECA feature extraction method. A multi-phase batch process fault diagnosis method, which applies the multi-class support vector machines (MSVM) and fireworks algorithm (FWA), is proposed to recognize each sub-phase fault diagnosis automatically. The effectiveness and advantages of the proposed multi-phase fault diagnosis method are illustrated with a case study on a fed-batch penicillin fermentation process.

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23

Liu, Rui, Jindong Zhang, Xiaobo Deng, Daiyin Zhu, Huangrong Zhou, and Mingming Guo. "Angular Super-Resolution of Multi-Channel APAR in Interference Environments." Electronics 12, no. 2 (January 12, 2023): 392. http://dx.doi.org/10.3390/electronics12020392.

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Aiming to resolve azimuth-dense targets in interference environments, the radar needs to have the ability of single snap echo angular super-resolution with anti-interference. To solve the problem, the angular super-resolution algorithm based on single snap echo while anti-interference with blocking matrix method is studied for active phased array radar (APAR) in this paper. Since the super-resolution ability of the conventional MUSIC algorithm and iterative adaptive algorithm (IAA) algorithm are limited in single snap echo, the iterative re-weighted least squares (IRLS) algorithm under p-norm constraint is proposed. Further, the near main lobe interference suppression ability is enhanced by the adaptive diagonal loading method. The performance differences of IAA and IRLS algorithms for single-target detection and double-target angular super-resolution are analyzed in detail by numerical simulation on three scenes of no interference, side-lobe interference, and near-main-lobe interference. The simulation results show that the proposed algorithm can effectively solve the problem of target angle estimation and super-resolution based on single sample echo in an interference environment, including near main-lobe interference.

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24

Jin, Kun Feng, and Ting Qiang Yao. "Multi-Body Contact Dynamics Analysis of Angular Contact Ball Bearing." Applied Mechanics and Materials 444-445 (October 2013): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.45.

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The 3-D multi-body contact dynamics simulation model was built by ADAMS base on the Hertz contact theory and multi-body contact dynamics, which considered the dynamics relationship among the ball, ring and cage of the bearing. Considering the clearancesfrictions and loads, results that contained deformation and displacement of the bearing, trajectory of the CM of the cage and the dynamic contact force were obtained by means of the 3-D multi-body contact dynamics model simulation and statics calculation. The outcomes got from two different methods are consistent, so the 3-D multi-body contact dynamics simulation model has the positive significance on dynamic design and engineering application of the bearing.

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25

Lim, Ka-Sing, Voon Chet Koo, and Hong-Tat Ewe. "MULTI-ANGULAR SCATTEROMETER MEASUREMENTS FOR VARIOUS STAGES OF RICE GROWTH." Progress In Electromagnetics Research 83 (2008): 385–96. http://dx.doi.org/10.2528/pier08070205.

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26

Li, Zhaoqun, Cheng Xu, and Biao Leng. "Angular Triplet-Center Loss for Multi-View 3D Shape Retrieval." Proceedings of the AAAI Conference on Artificial Intelligence 33 (July 17, 2019): 8682–89. http://dx.doi.org/10.1609/aaai.v33i01.33018682.

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How to obtain the desirable representation of a 3D shape, which is discriminative across categories and polymerized within classes, is a significant challenge in 3D shape retrieval. Most existing 3D shape retrieval methods focus on capturing strong discriminative shape representation with softmax loss for the classification task, while the shape feature learning with metric loss is neglected for 3D shape retrieval. In this paper, we address this problem based on the intuition that the cosine distance of shape embeddings should be close enough within the same class and far away across categories. Since most of 3D shape retrieval tasks use cosine distance of shape features for measuring shape similarity, we propose a novel metric loss named angular triplet-center loss, which directly optimizes the cosine distances between the features. It inherits the triplet-center loss property to achieve larger inter-class distance and smaller intra-class distance simultaneously. Unlike previous metric loss utilized in 3D shape retrieval methods, where Euclidean distance is adopted and the margin design is difficult, the proposed method is more convenient to train feature embeddings and more suitable for 3D shape retrieval. Moreover, the angle margin is adopted to replace the cosine margin in order to provide more explicit discriminative constraints on an embedding space. Extensive experimental results on two popular 3D object retrieval benchmarks, ModelNet40 and ShapeNetCore 55, demonstrate the effectiveness of our proposed loss, and our method has achieved state-ofthe-art results on various 3D shape datasets.

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27

Li, Longfei, Kun Yu, Feng Zhang, Yanlei Liu, Kaihua Zhang, and Yufang Liu. "High accurate multi-angular polarized spectrum thermometry for smooth surface." Infrared Physics & Technology 115 (June 2021): 103750. http://dx.doi.org/10.1016/j.infrared.2021.103750.

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28

HU Peng-hao, 胡鹏浩, 胡毅 HU Yi, and 党学明 DANG Xue-ming. "Multi-parameter measuring instrument for precise angular contact rolling bearing." Optics and Precision Engineering 22, no. 11 (2014): 3038–43. http://dx.doi.org/10.3788/ope.20142211.3038.

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29

Valantinas, A., P. Becerra, A. Pommerol, L. L. Tornabene, L. Affolter, G. Cremonese, E. Hauber, et al. "CaSSIS color and multi-angular observations of Martian slope streaks." Planetary and Space Science 209 (December 2021): 105373. http://dx.doi.org/10.1016/j.pss.2021.105373.

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30

Krállics, György, Zoltán Széles, and Dmitry Malgyn. "Finite Element Simulation of Multi-Pass Equal Channel Angular Pressing." Materials Science Forum 414-415 (January 2003): 439–44. http://dx.doi.org/10.4028/www.scientific.net/msf.414-415.439.

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31

Zhang, Zhonglin, Chao Ping Chen, Yang Li, Bing Yu, Lei Zhou, and Yishi Wu. "Angular multiplexing of holographic display using tunable multi-stage gratings." Molecular Crystals and Liquid Crystals 657, no. 1 (November 2, 2017): 102–6. http://dx.doi.org/10.1080/15421406.2017.1403787.

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32

HAMADA, Jun, Satoshi SUZUKI, Tomoyasu ICHIKAWA, Hironori KURIHARA, and Kazuya SUMIDA. "Adaptive PID based Angular Rate Control of Multi-rotor Helicopter." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2016 (2016): 1P1–17b7. http://dx.doi.org/10.1299/jsmermd.2016.1p1-17b7.

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33

Lee, S. M., J. Y. Hwang, and S. H. Chung. "Tomographic reconstruction of asymmetric soot structure from multi-angular scanning." Journal of Visualization 7, no. 2 (June 2004): 159–66. http://dx.doi.org/10.1007/bf03181589.

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34

Alkorta, Jon, Marleen Rombouts, Joke De Messemaeker, Ludo Froyen, and Javier Gil Sevillano. "On the impossibility of multi-pass equal-channel angular drawing." Scripta Materialia 47, no. 1 (July 2002): 13–18. http://dx.doi.org/10.1016/s1359-6462(02)00089-1.

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35

Braune, Markus, Axel Reinköster, Jens Viefhaus, Sanja Korica, and Uwe Becker. "Angular distributions and continuous intensity behavior in multi-photon processes." Journal of Physics: Conference Series 194, no. 3 (November 1, 2009): 032016. http://dx.doi.org/10.1088/1742-6596/194/3/032016.

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36

Akbar, Mariam, Nadeem Javaid, Muhammad Imran, Areeba Rao, Muhammad Shahzad Younis, and Iftikhar Azim Niaz. "A multi-hop angular routing protocol for wireless sensor networks." International Journal of Distributed Sensor Networks 12, no. 9 (September 2016): 155014771666294. http://dx.doi.org/10.1177/1550147716662945.

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37

Pham, Quang, Seung Chae Yoon, Sun Ig Hong, and Hyoung Seop Kim. "Three Dimensional Numerical Investigation of Equal Channel Multi-Angular Pressing." Materials Science Forum 503-504 (January 2006): 931–36. http://dx.doi.org/10.4028/www.scientific.net/msf.503-504.931.

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Plastic deformation behavior during equal channel multi-angular pressing (ECMAP) was analyzed using the three dimensional finite volume method of the commercial code MSC.Superforge. In order to understand local and global deformation characteristics, effective strain and pressing load histories were investigated. The predicted plastic deformation behavior of the workpiece material during ECMAP of route A, route B and route C with a theoretical total strain of ~2.2 upon a single pass at three different friction factors (m=0, 0.1 and 0.2) was compared. The predicted strain results show different values in outside and similar values in central regions of the processed workpieces with different friction and forming routes. The pressing loads are higher under higher friction condition, showing almost no difference with three different pressing routes.

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38

Kastner, Alexander, Greta Koumarianou, Pavle Glodic, Peter C. Samartzis, Nicolas Ladda, Simon T. Ranecky, Tom Ring, et al. "High-resolution resonance-enhanced multiphoton photoelectron circular dichroism." Physical Chemistry Chemical Physics 22, no. 14 (2020): 7404–11. http://dx.doi.org/10.1039/d0cp00470g.

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By combining molecular beam techniques with high resolution resonance enhanced multi photon ionization followed by angular resolved photoelectron detection we pave the way for enantiomer specific molecular identification in multi-component mixtures.

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39

Dao, Thanh Phong, and Shyh Chour Huang. "Optimization of Multiresponse Performance Measure in Slider-Rocker Compliant Mechanism Using Fuzzy-Taguchi Method." Advanced Materials Research 683 (April 2013): 708–11. http://dx.doi.org/10.4028/www.scientific.net/amr.683.708.

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This paper focuses on the application of fuzzy logic-Taguchi method for multi-objective optimization of the flexible segment in slider-rocker compliant mechanisms. The input parameters such as input torque and crank angular are optimized with considerations of the multiple performance measures as angular displacement and stress of the flexible segment. The results found that the input torque at level 3 of 60 Nm and crank angular at level 1 of 70 degrees are favorable parameters for compliant flapper mechanism. Based on analysis of variance (ANOVA), the results revealed that input crank angular is the most significant with hightest contribution of 48%.

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40

Selkowitz, David J., Gordon Green, Birgit Peterson, and Bruce Wylie. "A multi-sensor lidar, multi-spectral and multi-angular approach for mapping canopy height in boreal forest regions." Remote Sensing of Environment 121 (June 2012): 458–71. http://dx.doi.org/10.1016/j.rse.2012.02.020.

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41

Marson, R. G., T. R. Bedding, and J. G. Robertson. "Multi-wavelength Optical Aperture Synthesis." Publications of the Astronomical Society of Australia 10, no. 1 (1992): 71–73. http://dx.doi.org/10.1017/s1323358000019299.

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AbstractThe technique of aperture synthesis is well developed in radio astronomy. When applied to the optical regime, aperture synthesis allows one to partially overcome the blurring effects of the atmosphere and increase the angular resolution of large telescopes to the diffraction limit. MAPPIT (Masked APerture-Plane Interference Telescope) is a multi-element interferometer which operates at the coude focus of the 3.9 m Anglo-Australian Telescope. This instrument has recently been reconfigured to operate in a dispersed mode so that simultaneous observations in a band of wavelengths are possible. We will discuss this instrument’s new mode and present observations of the double star δ Sco and an angular diameter of the previously unresolved red giant β Gru.

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42

Wang, Yi, Honghua Wang, Jingwei Zhang, and Chao Tan. "A piecewise analytical model of bearingless switched reluctance motor for full rotor angular positions." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 41, no. 1 (November 11, 2021): 22–47. http://dx.doi.org/10.1108/compel-06-2019-0268.

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Purpose This paper aims to establish a piecewise Maxwell stress analytical model of bearingless switched reluctance motor (BSRM) for the full rotor angular positions. The proposed model varies from the existing models, which are only applicable to the partial-overlapping positions of stator and rotor poles. By extending the applicable rotor angular positions, this model provides a basic analytical model for the multi-phase excitation control of BSRM. Design/methodology/approach The full rotor angular positions are classified into the partial-overlapping positions and the non-overlapping positions. At first, two different air gap subdividing methods are proposed, respectively, for the two-position ranges. Then, different integration paths are selected accordingly. Furthermore, two approximate methods are presented to calculate the average flux density of each air gap subdivision. Finally, considering the mutual coupling between the two perpendicular radial suspension forces, a piecewise Maxwell stress analytical model is derived for the full rotor angular positions of BSRM. Findings A piecewise Maxwell stress analytical model of BSRM is built for the full rotor angular positions, and applicable to the multi-phase excitation mode of BSRM. For the partial-overlapping positions and the non-overlapping positions, two sets of air gap subdividing methods, integration paths and approximate calculation methods of air gap flux densities are proposed, respectively. The accuracy and reliability of the proposed model are verified by the finite element method. Originality/value The piecewise Maxwell stress analytical model of BSRM for the full rotor angular positions is proposed for the first time. The novel air gap subdividing methods, integration paths, approximate calculation methods of air gap flux densities and the coupling between the two radial suspension forces are adopted to improve the modeling accuracy. As the applicable range of rotor angular position is extended, this model overcomes the limitation of the existing models only for single-phase excitation mode and contributes to the accurate control of BSRM multi-phase excitation mode.

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43

Kruszelnicka, Weronika, Jakub Hlosta, Jan Diviš, and Łukasz Gierz. "Study of the Relationships Between Multi-Hole, Multi-Disc Mill Performance Parameters and Comminution Indicators." Sustainability 13, no. 15 (July 23, 2021): 8260. http://dx.doi.org/10.3390/su13158260.

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The knowledge of a grinder structure, its performance parameters and characteristics of biomaterials breakage are crucial for this research whose aim is to determine the dependencies between performance parameters and comminution indicators. The aim of this study is to investigate the relationships between multi-disc mill performance parameters such as discs angular speed, batch dosing speed and comminution characteristics: power consumption, specific energy consumption, throughput and size reduction ratio. To achieve these goals, an experiment was conducted on a five-disc mill with a special monitoring system. The research program was established, with disc angular speed at different configurations and different batch dosing speeds. The results show that power consumption, specific energy consumption and size reduction ratio depend on the total increase in angular speed of discs SΔω in such a way that an increase in SΔω causes an increase in the abovementioned comminution indicators. In turn, an increase in batch dosing speed W causes an increase in throughput. The fitting curves of comminution indicators in dependence of selected performance parameters are also presented in this study.

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44

LIU, FU-HU, NABIL N. ABD ALLAH, DONG-HAI ZHANG, and MAI-YING DUAN. "ANGULAR DISTRIBUTIONS OF TARGET BLACK FRAGMENTS IN NUCLEUS–NUCLEUS COLLISIONS AT HIGH ENERGY." International Journal of Modern Physics E 12, no. 05 (October 2003): 713–23. http://dx.doi.org/10.1142/s0218301303001533.

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The experimental results of space, azimuthal, and projected angular distributions of target black fragments produced in silicon-emulsion collisions at 4.5A GeV/c (the Dubna energy) are reported. A multi-source ideal gas model is suggested to describe the experimental angular distributions. The Monte Carlo calculated results are in agreement with the experimental data.

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Fan, Li Ming, Yong Hong Hu, and Peng Wu. "Design and Implementation of Angular Sensor in Radio Positioning System." Advanced Materials Research 181-182 (January 2011): 965–73. http://dx.doi.org/10.4028/www.scientific.net/amr.181-182.965.

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According to the Index Requirements of Radiolocation in a small aircraft, a Digital high-precision angular sensor is designed. Based on the design idea of multi-stage rotary transformer as angular displacement of the collector, introduced the principle of angle sensor, give the detailed design of hardware, described data collection, data processing and coding methods. Through laboratory static testing and dynamic testing, the test results with the static and dynamic shows GPS azimuth fit data well. Error analysis shows that: In this paper, the angular sensor designed, precision target to meet the system requirements may be applied to other areas of the angular displacement measurement system.

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Nishihara, Kazue. "Fundamental Study on Hand Waving Sensors." Journal of Robotics and Mechatronics 2, no. 5 (October 20, 1990): 325–34. http://dx.doi.org/10.20965/jrm.1990.p0325.

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In order to develop a dynamic man-machine interface which measures angular motions of multi-link mechanisms, a uniaxial hand wave sensor is experimented with and triaxial hand wave sensors are simulated numerically. It was confirmed that a uniaxial hand wave sensor composed of a pair of uniaxially located accelerometers directly obtains exact angular acceleration by subtracting each acceleration signal. A triaxial hand wave sensor by a six (i.e. three pairs) accelerometer method, however, contains duplex angular velocities influenced by other axes in addition to the exact angular acceleration, so it is necessary to separate those physical values by a software algorithm. Adams-Moulton's method for solving differential equations was best suited to solve this nonlinear problem. A nine accelerometer method obtains linear equations for angular accelerations readily after arithmetic calculations of the nine signals.

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Treimer, W., A. Höfer, and H. Strothmann. "The Use of a Multi-Double-Crystal Diffractometer to Investigate Nickel Domains." Journal of Applied Crystallography 30, no. 5 (October 1, 1997): 849–53. http://dx.doi.org/10.1107/s0021889897001052.

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The investigations of the domain structure in Ni single crystals is best performed with a double-crystal diffractometer. Conventional small-angle instruments do not have the necessary angular resolution to distinguish satellites of a main peak due to spin-dependent refraction of unpolarized neutrons by Bloch walls in Ni. With the help of a double-crystal diffractometer operating with lamellae crystals as monochromator and analyzer, the angular resolution is maintained but the intensity enhanced by a factor of 5.4. Within a series of measurements, it was possible to investigate Ni domains due to the high angular resolution of the new multi-double-crystal instrument and this improved intensity. The first results of the domain structure in (110) Ni single crystals and a good estimation of the Bloch wall thickness are given.

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Yang, X. H., and W. L. Zhu. "Note. Modelling the Rheological Properties of the Solution of Konjac Glucomannan and Milk Powder." Food Science and Technology International 12, no. 2 (April 2006): 127–32. http://dx.doi.org/10.1177/1082013206064006.

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Shear storage and loss moduli (G″ and G ′) of a solution of konjac glucomannan (KGM) and milk powder were measured while varying angular frequency and temperature. Results showed that both G′ and G″ increased with the angular frequency sweeping from 0.1 rad/s to 100 rad/s, in a variety of temperatures and KGM concentrations. However, they decrease with temperature sweeping from 10°C to 50°C. These recorded curves were satisfactorily fitted to a multi-element Maxwell model. The angular sweep and temperature ramp data sitting along a sole line on the G″ –G′ diagram demonstrates the solution of KGM and milk powder obeys the time–temperature superposition principle. Furthermore, the fitted magnitude of G1 of the first multi-element Maxwell model is proportional to the concentration of the solution. These results are valuable for the optimising production of the functional KGM-milk food.

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Zhang, Xiaoning, Ziti Jiao, Changsen Zhao, Siyang Yin, Lei Cui, Yadong Dong, Hu Zhang, et al. "Retrieval of Leaf Area Index by Linking the PROSAIL and Ross-Li BRDF Models Using MODIS BRDF Data." Remote Sensing 13, no. 23 (December 3, 2021): 4911. http://dx.doi.org/10.3390/rs13234911.

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Canopy structure parameters (e.g., leaf area index (LAI)) are key variables of most climate and ecology models. Currently, satellite-observed reflectances at a few viewing angles are often directly used for vegetation structure parameter retrieval; therefore, the information content of multi-angular observations that are sensitive to canopy structure in theory cannot be sufficiently considered. In this study, we proposed a novel method to retrieve LAI based on modelled multi-angular reflectances at sufficient sun-viewing geometries, by linking the PROSAIL model with a kernel-driven Ross-Li bi-directional reflectance function (BRDF) model using the MODIS BRDF parameter product. First, BRDF sensitivity to the PROSAIL input parameters was investigated to reduce the insensitive parameters. Then, MODIS BRDF parameters were used to model sufficient multi-angular reflectances. By comparing these reference MODIS reflectances with simulated PROSAIL reflectances within the range of the sensitive input parameters in the same geometries, the optimal vegetation parameters were determined by searching the minimum discrepancies between them. In addition, a significantly linear relationship between the average leaf angle (ALA) and the coefficient of the volumetric scattering kernel of the Ross-Li model in the near-infrared band was built, which can narrow the search scope of the ALA and accelerate the retrieval. In the validation, the proposed method attains a higher consistency (root mean square error (RMSE) = 1.13, bias = −0.19, and relative RMSE (RRMSE) = 36.8%) with field-measured LAIs and 30-m LAI maps for crops than that obtained with the MODIS LAI product. The results indicate the vegetation inversion potential of sufficient multi-angular data and the ALA relationship, and this method presents promise for large-scale LAI estimation.

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Teng, Fei, Yun Lin, Yanping Wang, Wenjie Shen, Shanshan Feng, and Wen Hong. "An Anisotropic Scattering Analysis Method Based on the Statistical Properties of Multi-Angular SAR Images." Remote Sensing 12, no. 13 (July 5, 2020): 2152. http://dx.doi.org/10.3390/rs12132152.

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The scatterings of many targets are aspect dependent, which is called anisotropy. Multi-angular synthetic aperture radar (SAR) is a suitable means of detecting this kind of anisotropic scattering behavior by viewing targets from different aspect angles. First, the statistical properties of anisotropic and isotropic scatterings are studied in this paper. X-band chamber circular SAR data are used. The result shows that isotropic scatterings have stable distributions in different aspect viewing angles while the distributions of anisotropic scatterings are various. Then the statistical properties of single polarization high-resolution multi-angular SAR images are modeled by different distributions. G 0 distribution performs best in all types of areas. An anisotropic scattering analysis method based on the multi-angular statistical properties is proposed. A likelihood ratio test based on G 0 distribution is used to measure the anisotropy. Anisotropic scatterings can be discriminated from isotropic scatterings by thresholding. Besides, the scattering direction can also be estimated by our method. AHH polarization C-band circular SAR data are used to validate our method. The result of using G 0 distribution is compared with the result of using Rayleigh distribution. The result of using G 0 distribution is the better one.

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