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Artículos de revistas sobre el tema "Multi-Dimensional modulations"

Autor: Grafiati
Publicado: 1 de junio de 2024
Última modificación: 31 de julio de 2025

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1

Mjølhus, E., and T. Hada. "Oblique stability of circularly polarized MHD waves." Journal of Plasma Physics 43, no. 2 (1990): 257–68. http://dx.doi.org/10.1017/s002237780001477x.

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The stability of finite-amplitude weakly dispersive circularly polarized MHD wave trains with respect to oblique modulations is investigated. The mathematical model is a multi-dimensional extension of the DNLS equation. We have found that the right-hand-polarized wave, which is stable with respect to parallel modulations, is unstable with respect to certain oblique modulations for most primary wavenumbers.
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2

Lidin, Sven, Partha Jana, Carola Müller, Shuying Piao, and Simeon Ponou. "News from the world of modulated intermetallics." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C167. http://dx.doi.org/10.1107/s2053273314098325.

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The number of modulated structures with more than one modulation vector is small, and such structures often pose special problems in solving and refining. This talk will be concentrated on three such cases; The 3+4 dimensionally modulated cubic structure of digenite, the 3+2 dimensionally modulated structure of Cu3In2, the 3+2 dimensionally modulated structure of AuZn3 and the 3+2 dimensionally modulated structure of Se(Sn4)2K10. The three former cases are interesting because they are relatively weakly ordered structures where modelling is straight-forward, but the model itself is less than ob
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3

Li, Zhongzhi, Rong Fan, Jinyi Ma, Jianliang Ai, and Yiqun Dong. "Dynamic Temporal Denoise Neural Network with Multi-Head Attention for Fault Diagnosis Under Noise Background." Sensors 24, no. 21 (2024): 6813. http://dx.doi.org/10.3390/s24216813.

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Fault diagnosis plays a crucial role in maintaining the operational safety of mechanical systems. As intelligent data-driven approaches evolve, deep learning (DL) has emerged as a pivotal technique in fault diagnosis research. However, the collected vibrational signals from mechanical systems are usually corrupted by unrelated noises due to complicated transfer path modulations and component coupling. To solve the above problems, this paper proposed the dynamic temporal denoise neural network with multi-head attention (DTDNet). Firstly, this model transforms one-dimensional signals into two-di
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4

M. Navazi, Hassan, and Md Jahangir Hossain. "Novel Method for Multi-Dimensional Mapping of Higher Order Modulations for BICM-ID Over Rayleigh Fading Channels." IEEE Transactions on Wireless Communications 18, no. 2 (2019): 1142–54. http://dx.doi.org/10.1109/twc.2018.2890061.

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5

Lu, Yi, Biao Tang, Guisong Yang, Yuanyuan Guo, Linwei Liu, and Alex Henzen. "Progress in Advanced Properties of Electrowetting Displays." Micromachines 12, no. 2 (2021): 206. http://dx.doi.org/10.3390/mi12020206.

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Electrowetting display (EWD) has promising prospects in the electronic paper industry due to it having superior characteristics, such as the ability to provide a comfortable reading experience and quick response. However, in real applications, there are also problems related to dielectric deterioration, excess power consumption, optical instability and narrow color gamut etc. This paper reviewed the existing challenges and recent progress made in terms of improving the optical performance and reliability of EWD. First, the principle of electrowetting applied in small and confined configuration
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6

Schoenberg, Poppy L. A., та Anne E. M. Speckens. "Multi-dimensional modulations of α and γ cortical dynamics following mindfulness-based cognitive therapy in Major Depressive Disorder". Cognitive Neurodynamics 9, № 1 (2014): 13–29. http://dx.doi.org/10.1007/s11571-014-9308-y.

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7

Pier, Benoît, and Peter J. Schmid. "Linear and nonlinear dynamics of pulsatile channel flow." Journal of Fluid Mechanics 815 (February 21, 2017): 435–80. http://dx.doi.org/10.1017/jfm.2017.58.

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The dynamics of small-amplitude perturbations, as well as the regime of fully developed nonlinear propagating waves, is investigated for pulsatile channel flows. The time-periodic base flows are known analytically and completely determined by the Reynolds number $Re$ (based on the mean flow rate), the Womersley number $Wo$ (a dimensionless expression of the frequency) and the flow-rate waveform. This paper considers pulsatile flows with a single oscillating component and hence only three non-dimensional control parameters are present. Linear stability characteristics are obtained both by Floqu
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8

Cao, Jiuxiao, Rui Zhu, Zhen Wang, Jun Wang, Guohao Shi, and Peng Chu. "Recognition of common shortwave protocols and their subcarrier modulations based on multi-scale convolutional GRU." PLOS One 20, no. 6 (2025): e0326536. https://doi.org/10.1371/journal.pone.0326536.

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Shortwave communication plays a vital role in disaster relief and remote communications due to its long-range capabilities and resilience to interference. However, challenges such as multipath propagation, frequency-selective fading, and low signal-to-noise ratios (SNR) significantly hinder automatic protocol and modulation recognition. Traditional signal processing approaches often fail under such conditions, whereas deep learning offers new possibilities for robust signal classification. This study proposes a Multi-Scale Convolutional GRU (MSC-GRU) model for the automatic recognition of thre
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9

Leyser, Thomas B. "Deterministic chaos in modulated multi-cell drifts of localized lower-hybrid oscillations excited by high-frequency waves in the ionosphere." Annales Geophysicae 43, no. 1 (2025): 319–29. https://doi.org/10.5194/angeo-43-319-2025.

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Abstract. The prominent broad upshifted maximum (BUM) feature in electromagnetic emissions stimulated by powerful high-frequency radio waves in the ionosphere exhibits an exponential spectrum for pump frequencies near a harmonic of the ionospheric electron gyro frequency. Exponential power spectra are a characteristic of deterministic chaos. In the present treatment, a two-fluid model is derived for lower-hybrid (LH) oscillations driven by parametric interaction of the electromagnetic pump field, the electron Bernstein mode, and the upper-hybrid mode, as previously proposed to interpret the BU
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10

Chen Yanjie, 陈彦杰, 徐正琨 Xu Zhengkun, 赵睿哲 Zhao Ruizhe, 李晓炜 Li Xiaowei, 王涌天 Wang Yongtian та 黄玲玲 Huang Lingling. "多维度大容量超表面全息及光场变换". Acta Optica Sinica 44, № 2 (2024): 0200005. http://dx.doi.org/10.3788/aos231100.

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11

Pegna, Alan J., Alexandra Darque, Mark V. Roberts, and E. Charles Leek. "Effects of stereoscopic disparity on early ERP components during classification of three-dimensional objects." Quarterly Journal of Experimental Psychology 71, no. 6 (2018): 1419–30. http://dx.doi.org/10.1080/17470218.2017.1333129.

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This study investigates the effects of stereo disparity on the perception of three-dimensional (3D) object shape. We tested the hypothesis that stereo input modulates the brain activity related to perceptual analyses of 3D shape configuration during image classification. High-density (256-channel) electroencephalogram (EEG) was used to record the temporal dynamics of visual shape processing under conditions of two-dimensional (2D) and 3D visual presentation. On each trial, observers made image classification judgements (‘Same’/’Different’) to two briefly presented, multi-part, novel objects. O
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12

Zhu Chen, 朱宸, 邵正龙 Shao Zhenglong, 周英杰 Zhou Yingjie, 任佳琪 Ren Jiaqi, 樊帆 Fan Fan та 汤东亮 Tang Dongliang. "液晶的多维度光场调控技术研究进展". Chinese Journal of Lasers 50, № 18 (2023): 1813006. http://dx.doi.org/10.3788/cjl230716.

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13

Fusaro, A., P. Loiseau, D. Penninckx, G. Riazuelo, and R. Collin. "Improving stimulated Brillouin scattering mitigation in weakly-damped plasmas: from spectral dispersion to spectral distribution." Nuclear Fusion 61, no. 12 (2021): 126049. http://dx.doi.org/10.1088/1741-4326/ac31d9.

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Abstract Optical smoothing techniques are widely used in large high-power laser facilities designed for inertial confinement fusion research, such as the Laser Mégajoule (LMJ) in France. Those techniques are of primordial interest because they reduce laser–plasma instabilities as, for example, the stimulated backward Brillouin scattering (SBS). The latter takes place in the hot plasmas produced inside a hohlraum by the ablation of high-Z or gold material where ion acoustic waves are weakly damped, easing SBS. However, despite the current optical smoothing implementation, like smoothing by spec
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14

Rolf, Nina, Lorraine YT Liu, Pascal LeClair, et al. "High-Dimensional Single-Cell Analysis of Clinical-Grade Flow Cytometry Explains the Unpredictable Complex Shifts of Patient-Specific Immunophenotypes during B-ALL Relapse Progression." Blood 144, Supplement 1 (2024): 5928. https://doi.org/10.1182/blood-2024-211186.

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Relapsed precursor B-cell ALL (B-ALL) commonly evolves from minor diagnostic clones, but their early phenotypic characterization remains unachieved despite abundant multi-omics data. Immunophenotyping, an essential diagnostic and therapy-response monitoring tool, identifies the patient-specific expression pattern of bulk leukemia. At time of relapse, most B-ALL immunophenotypes have undergone substantial and seemingly random multi-directional modulations of their diagnostic expression pattern. For decades, these unpredictable immunophenotypic shifts at time of relapse, observed across differen
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15

Ekengoue, C. M., C. Kenfack-Sadem, J. E. Danga, et al. "Polariton condensate and Landau-Zener-Stückelberg interferometry transition in multilayer transition metal dichalcogenides." Physica Scripta 97, no. 2 (2022): 025801. http://dx.doi.org/10.1088/1402-4896/ac4718.

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Abstract This paper gives a detailed description of a high-performance polariton condensate for a quantum mechanical two-level system (TLS). We propose a transition metal dichalcogenides (TMDs) setup and theoretically carry out the spectroscopy of these polariton condensates. Through theoretical and numerical analysis, we obtain many features in two dimensional (2D) multilayer TMDs. We compute the energy of the system and the Landau-Zener-Stückelberg (LZS) quantum tunneling probability under the effect of a sequence of laser light. At certain critical 2D TMDs parameters, the system exhibits a
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16

Feng, Dan, Qingli He, Baoming Bai, Jianping Zheng, and Mengmeng Liu. "Spatial Modulation With Multi-Dimensional Constellations." IEEE Wireless Communications Letters 9, no. 1 (2020): 99–102. http://dx.doi.org/10.1109/lwc.2019.2943341.

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17

Li, Bin, Lu Bo Li, and Gui Dan Li. "Non-Sinusoidal SVPWM for Five-Phase Inverter Based on MMF Equivalence." Advanced Materials Research 694-697 (May 2013): 1524–31. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1524.

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The multi-phase inverter modulation and control method is a hotspot of multiphase systems. There is no general space vector modulation available due to the inherent difficulty in synthesizing more than one independent space vector simultaneously in different d-p planes. This paper established the distribution model of five-phase inverter space vector from a novel perspective of magnetic motive force (MMF) equivalence. And then a multi-dimensional SVPMW method applicable to the non-sinusoidal voltage output was proposed based on the obtained space vector distribution laws. The proposed multi-di
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18

Lu, Siyao, Ibrahim A. Hemadeh, Mohammed El-Hajjar, and Lajos Hanzo. "Compressed Sensing-Aided Multi-Dimensional Index Modulation." IEEE Transactions on Communications 67, no. 6 (2019): 4074–87. http://dx.doi.org/10.1109/tcomm.2019.2902393.

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19

Worts, Nathan, John Czerski, Jason Jones, Jeffrey J. Field, Randy Bartels, and Jeff Squier. "Simultaneous multi-dimensional spatial frequency modulation imaging." International Journal of Optomechatronics 14, no. 1 (2020): 1–17. http://dx.doi.org/10.1080/15599612.2019.1694610.

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20

Wang, Shoubin, Huan Li, Xiaolong Zhang, Hao Jiang, and Lei Shen. "Blind Recognition Algorithm of Multi-Carrier Composite Modulation Signal Based on Multi-Dimensional Time-Frequency Superimposed Spectrum." Sensors 25, no. 13 (2025): 4007. https://doi.org/10.3390/s25134007.

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The existing multi-carrier composite modulation recognition methods have failed to effectively integrate inner and outer modulation characteristics, thereby limiting the potential for improving recognition performance under low signal-to-noise ratio (SNR) conditions. To address this issue, this paper proposes a multi-carrier composite signal modulation recognition algorithm based on a multi-dimensional time-frequency superimposed spectrum (MD-TFSS) with integrated inner and outer features, which can recognize composite modulation signals in the set {BPSK-PM, QPSK-PM, BPSK-QPSK-PM, BPSK-BPSK-PM
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21

Xie, Jinlong, Jiahao Wu, Yifei Fang, et al. "P‐4.3: Multi‐viewpoint holographic near‐eye display with expanded eyebox by integrating a MEMS device." SID Symposium Digest of Technical Papers 56, S1 (2025): 925–27. https://doi.org/10.1002/sdtp.18965.

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Traditional near‐eye display (NED) systems often rely on bulky optical setups and fixed image planes, which limit their field of view (FOV) and eyebox, while struggling to effectively address the vergence‐accommodation conflict (VAC). To overcome these challenges, we present an innovative NED system that integrates polarization‐sensitive metasurface holography with Micro‐ElectroMechanical Systems (MEMS) scanning mirrors. This system achieves multi‐viewpoint holography and significantly expands the eyebox, while maintaining a compact structure. The proposed system employs a geometric‐phase meta
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22

Qian, Liangxin, Ping Yang, Yong Liang Guan, et al. "Multi-Dimensional Polarized Modulation for Land Mobile Satellite Communications." IEEE Transactions on Cognitive Communications and Networking 7, no. 2 (2021): 383–97. http://dx.doi.org/10.1109/tccn.2021.3072593.

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23

Naka, Akira, and Shota Yamada. "Characteristics of multi-dimensional modulation with MIMO signal processing." IEICE Communications Express 5, no. 12 (2016): 461–66. http://dx.doi.org/10.1587/comex.2016xbl0160.

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24

Ishimura, Shota, and Kazuro Kikuchi. "Multi-dimensional permutation-modulation format for coherent optical communications." Optics Express 23, no. 12 (2015): 15587. http://dx.doi.org/10.1364/oe.23.015587.

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25

Ko, Youngwook, and Jinho Choi. "Unsupervised Machine Intelligence for Automation of Multi-Dimensional Modulation." IEEE Communications Letters 23, no. 10 (2019): 1783–86. http://dx.doi.org/10.1109/lcomm.2019.2932417.

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26

He, Zilong, Wentao Liu, Sheping Shi, et al. "Flexible multi-dimensional modulation method for elastic optical networks." Optics Communications 359 (January 2016): 304–10. http://dx.doi.org/10.1016/j.optcom.2015.09.098.

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27

Wang, Jiadun, Shengtao Li, and Kai Huang. "Point Cloud Fusion of Human Respiratory Motion Under Multi-View Time-of-Flight Camera System: Voxelization Method Using 2D Voxel Block Index." Sensors 25, no. 10 (2025): 3062. https://doi.org/10.3390/s25103062.

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Time-of-flight (ToF) 3D cameras can obtain a real-time point cloud of human respiratory motion in medical robot scenes. Through this point cloud, real-time displacement information can be provided for the medical robot to avoid the robot injuring the human body during the operation due to the positioning deviation. However, multi-camera deployments face a conflict between spatial coverage and measurement accuracy due to the limitations of different types of ToF modulation. To address this, we design a multi-camera acquisition system incorporating different modulation schemes and propose a mult
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28

Xiao, Yan, Kehui Sun, Mengyao Yu, and Xuemei Xu. "Dynamics of a New Multi-Cavity Hyperchaotic Map and Its DSP Implementation." International Journal of Bifurcation and Chaos 29, no. 14 (2019): 1950194. http://dx.doi.org/10.1142/s0218127419501943.

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A new higher-dimensional hyperchaotic map, named Sine Chebyshev modulation map (SCMM), is proposed based on the closed-loop modulation coupling (CMC) model. The dynamics of the SCMM are evaluated by attractor diagrams, Lyapunov exponents and bifurcations. By designing a piecewise-linear function, the SCMM is expanded to the grid multi-cavity form. Dynamical behaviors of the two-dimensional grid multi-cavity SCMM are then analyzed. The results show that it has rich dynamical characteristics, including complicated phase space trajectories, hyperchaotic behaviors, large maximum Lyapunov exponent
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29

Peng, Zhichao, Hua Zeng, Yongwei Li, Yegang Du, and Jianwu Dang. "Enhancing Dimensional Emotion Recognition from Speech through Modulation-Filtered Cochleagram and Parallel Attention Recurrent Network." Electronics 12, no. 22 (2023): 4620. http://dx.doi.org/10.3390/electronics12224620.

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Dimensional emotion can better describe rich and fine-grained emotional states than categorical emotion. In the realm of human–robot interaction, the ability to continuously recognize dimensional emotions from speech empowers robots to capture the temporal dynamics of a speaker’s emotional state and adjust their interaction strategies in real-time. In this study, we present an approach to enhance dimensional emotion recognition through modulation-filtered cochleagram and parallel attention recurrent neural network (PA-net). Firstly, the multi-resolution modulation-filtered cochleagram is deriv
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30

Xue, Ju-Kui. "Modulational instability of multi-dimensional dust ion-acoustic waves." Physics Letters A 330, no. 5 (2004): 390–95. http://dx.doi.org/10.1016/j.physleta.2004.08.013.

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31

Jiang, Yingchun, and Jing Yang. "Nonuniform Sampling in Lp-Subspaces Associated with the Multi-Dimensional Special Affine Fourier Transform." Axioms 13, no. 5 (2024): 329. http://dx.doi.org/10.3390/axioms13050329.

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In this paper, the sampling and reconstruction problems in function subspaces of Lp(Rn) associated with the multi-dimensional special affine Fourier transform (SAFT) are discussed. First, we give the definition of the multi-dimensional SAFT and study its properties including the Parseval’s relation, the canonical convolution theorems and the chirp-modulation periodicity. Then, a kind of function spaces are defined by the canonical convolution in the multi-dimensional SAFT domain, the existence and the properties of the dual basis functions are demonstrated, and the Lp-stability of the basis fu
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32

Naka, Akira. "BER performance analysis of multi-dimensional modulation with BICM-ID." IEICE Communications Express 6, no. 12 (2017): 645–50. http://dx.doi.org/10.1587/comex.2017xbl0123.

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33

Zhang, Hongbin, Hussam G. Batshon, Carl R. Davidson, Dmitri G. Foursa, and Alexei Pilipetskii. "Multi-Dimensional Coded Modulation in Long-Haul Fiber Optic Transmission." Journal of Lightwave Technology 33, no. 13 (2015): 2876–83. http://dx.doi.org/10.1109/jlt.2015.2419821.

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34

Wang Xudong, 王旭东, 刘莹 Liu Ying, 吴楠 Wu Nan, and 林彬 Lin Bin. "Hybrid Multi-Dimensional CAP-MPPM Modulation Scheme for VLC Systems." Chinese Journal of Lasers 47, no. 6 (2020): 0606004. http://dx.doi.org/10.3788/cjl202047.0606004.

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35

Kim, Tae, and Dong Kim. "Multi-Dimensional Sparse-Coded Ambient Backscatter Communication for Massive IoT Networks." Energies 11, no. 10 (2018): 2855. http://dx.doi.org/10.3390/en11102855.

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In this paper, we propose a multi-dimensional sparse-coded ambient backscatter communication (MSC-AmBC) system for long-range and high-rate massive Internet of things (IoT) networks. We utilize the characteristics of the ambient sources employing orthogonal frequency division multiplexing (OFDM) modulation to mitigate strong direct-link interference and improve signal detection of AmBC at the reader. Also, utilization of the sparsity originated from the duty-cycling operation of batteryless RF tags is proposed to increase the dimension of signal space of backscatter signals to achieve either d
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36

Hao, Ming, Wei He, Xuedong Jiang, et al. "Modulation Format Identification Based on Multi-Dimensional Amplitude Features for Elastic Optical Networks." Photonics 11, no. 5 (2024): 390. http://dx.doi.org/10.3390/photonics11050390.

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A modulation format identification (MFI) scheme based on multi-dimensional amplitude features is proposed for elastic optical networks. According to the multi-dimensional amplitude features, incoming polarization division multiplexed (PDM) signals can be identified as QPSK, 8QAM, 16QAM, 32QAM, 64QAM and 128QAM signals using the k-nearest neighbors (KNNs) algorithm in the digital coherent receivers. The proposed scheme does not require any prior training or optical signal-to-noise ratio (OSNR) information. The performance of the proposed MFI scheme is verified based on numerical simulations wit
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37

Ha, Inho, Joung-Moon Lee, and Sang-Kook Han. "SOP Change Robust Optical Modulation Based on Dual Polarization Modulation for Multi-Dimensional Optical Transmission." IEEE Access 9 (2021): 119139–46. http://dx.doi.org/10.1109/access.2021.3106904.

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38

El-Hajjar, Mohammed, Osamah Alamri, Jin Wang, Salam Zummo, and Lajos Hanzo. "Layered steered space-time codes using multi-dimensional sphere packing modulation." IEEE Transactions on Wireless Communications 8, no. 7 (2009): 3335–40. http://dx.doi.org/10.1109/twc.2009.071292.

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39

Kassouf, Marthe, and Harry Leib. "Information rates for multi-dimensional modulation over multiple antenna wireless channels." European Transactions on Telecommunications 20, no. 5 (2009): 463–81. http://dx.doi.org/10.1002/ett.1318.

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40

He, Jiangle, Yaxuan Li, Yangyang Fan, et al. "Directional Excitation of Multi-Dimensional Coupled Topological Photonic States Based on Higher-Order Chiral Source." Photonics 12, no. 5 (2025): 488. https://doi.org/10.3390/photonics12050488.

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The topological phase of matter brings extra inspiration for efficient light manipulation. Here, we propose two-parameter tunable topological transitions based on distorted Kagome photonic crystals. By selecting specific splicing boundaries, we successfully visualize several diverse types of robust edge states and corner states. Through introducing optical vortices with tunable orbital angular momentum, we demonstrate the directional excitation of multi-dimensional topological states as needed. Furthermore, we have studied the coupling effects of multi-dimensional photonic states and the modul
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41

Peng, Zhichao, Wenhua He, Yongwei Li, Yegang Du, and Jianwu Dang. "Multi-Level Attention-Based Categorical Emotion Recognition Using Modulation-Filtered Cochleagram." Applied Sciences 13, no. 11 (2023): 6749. http://dx.doi.org/10.3390/app13116749.

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Speech emotion recognition is a critical component for achieving natural human–robot interaction. The modulation-filtered cochleagram is a feature based on auditory modulation perception, which contains multi-dimensional spectral–temporal modulation representation. In this study, we propose an emotion recognition framework that utilizes a multi-level attention network to extract high-level emotional feature representations from the modulation-filtered cochleagram. Our approach utilizes channel-level attention and spatial-level attention modules to generate emotional saliency maps of channel an
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42

Wang, Xing, Degui Yang, and Zhichen Zhao. "Multi-Dimensional Parameter-Estimation Method for a Spatial Target Based on the Micro-Range Decomposition of a High-Resolution Range Profile." Remote Sensing 17, no. 7 (2025): 1294. https://doi.org/10.3390/rs17071294.

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The high-precision estimation of multi-dimensional parameters for spatial targets based on high-resolution range profiles is crucial for target recognition. However, existing estimation methods face difficulties in resolving the strong coupling between the target shape and the micro-motion parameters, as well as in fully utilizing micro-motion information under complex modulation characteristics. To address these challenges, this paper proposes a multi-dimensional parameter-estimation method for spatial targets based on micro-range decomposition. A micro-range model of the target is first cons
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43

Zhang, Shuai, Heng Wang, Yan Pan, et al. "A Novel Continuous-Variable Quantum Key Distribution Scheme Based on Multi-Dimensional Multiplexing Technology." Applied Sciences 14, no. 2 (2024): 934. http://dx.doi.org/10.3390/app14020934.

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Dual-polarization division multiplexing (DPDM) is considered to be a potential method to boost the secure key rate (SKR) of the continuous-variable quantum key distribution (CV-QKD) system. In this article, we propose a pilot alternately assisted local local oscillator (LLO) CV-QKD scheme based on multi-dimensional multiplexing, where time division multiplexing and frequency division multiplexing are combined with dual-polarization multiplexing techniques to dramatically isolate the quantum signal from the pilot tone. We establish a general excess noise model for the LLO CV-QKD system to analy
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44

Lu, Siyao, Mohammed El-Hajjar, and Lajos Hanzo. "Two-Dimensional Index Modulation for the Large-Scale Multi-User MIMO Uplink." IEEE Transactions on Vehicular Technology 68, no. 8 (2019): 7904–18. http://dx.doi.org/10.1109/tvt.2019.2926884.

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45

Zhong Runhui, Ling Jinzhong, Li Yangyang, Yang Xudong, and Wang Xiaorui. "Design of Meta-surface Lens Combining with Pupil Filter." Acta Physica Sinica 74, no. 4 (2025): 0. https://doi.org/10.7498/aps.74.20241490.

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Metasurface lenses are miniature flat lenses that achieve precise control of the phase, amplitude, and polarization of incident light by modulating the parameters of each unit on the substrate. Compared with conventional optical lenses, they have the advantages of small size, light weight, and high integration, and are the core components of photonic chips. Currently, the hot topics for metasurface lens are broadband and achromatic devices, and there is still little attention paid to the resolution improvement. To break through the diffraction limit and further improve the focusing performance
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46

Su, Guangxu, Jiangle He, Xiaofei Ye, et al. "Tailored Triggering of High-Quality Multi-Dimensional Coupled Topological States in Valley Photonic Crystals." Nanomaterials 14, no. 10 (2024): 885. http://dx.doi.org/10.3390/nano14100885.

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The combination of higher-order topological insulators and valley photonic crystals has recently aroused extensive attentions due to the great potential in flexible and efficient optical field manipulations. Here, we computationally propose a photonic device for the 1550 nm communication band, in which the topologically protected electromagnetic modes with high quality can be selectively triggered and modulated on demand. Through introducing two valley photonic crystal units without any structural alteration, we successfully achieve multi-dimensional coupled topological states thanks to the di
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47

Zou, Yongtu, Shaolin Zhou, Jingxi Li, Shanri Chen, and Zhijian Chen. "A Mid-Infrared Perfect Metasurface Absorber with Tri-Band Broadband Scalability." Nanomaterials 14, no. 15 (2024): 1316. http://dx.doi.org/10.3390/nano14151316.

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Metasurfaces have emerged as a unique group of two-dimensional ultra-compact subwavelength devices for perfect wave absorption due to their exceptional capabilities of light modulation. Nonetheless, achieving high absorption, particularly with multi-band broadband scalability for specialized scenarios, remains a challenge. As an example, the presence of atmospheric windows, as dictated by special gas molecules in different infrared regions, highly demands such scalable modulation abilities for multi-band absorption and filtration. Herein, by leveraging the hybrid effect of Fabry–Perot resonanc
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48

García, A. G., M. A. Hernández-Medina, and G. Pérez-Villalón. "Filter banks on discrete abelian groups." International Journal of Wavelets, Multiresolution and Information Processing 16, no. 04 (2018): 1850029. http://dx.doi.org/10.1142/s0219691318500297.

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In this work, we provide polyphase, modulation, and frame theoretical analyses of a filter bank on a discrete abelian group. Thus, multi-dimensional or cyclic filter banks as well as filter banks for signals in [Formula: see text] or [Formula: see text] spaces are studied in a unified way. We obtain perfect reconstruction conditions and the corresponding frame bounds in this particular context.
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49

Riahi, D. N. "Preferred pattern of convection in a porous layer with a spatially non-uniform boundary temperature." Journal of Fluid Mechanics 246 (January 1993): 529–43. http://dx.doi.org/10.1017/s0022112093000254.

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The problem of finite-amplitude thermal convection in a porous layer between two horizontal walls with different mean temperatures is considered when spatially non-uniform temperature with amplitude L* is prescribed at the lower wall. The nonlinear problem of three-dimensional convection for values of the Rayleigh number close to the classical critical value is solved by using a perturbation technique. Two cases are considered: the wavelength γ(b)n of the nth mode of the modulation is equal to or not equal to the critical wavelength γc for the onset of classical convection. The preferred mode
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50

Papanikolaou, Nikos, IE Psarobas, Nikos Stefanou, Rouhani Bahram Djafari, Bernard Bonello, and Vincent Laude. "Light modulation in phoxonic nanocavities." Microelectronic engineering 90 (May 8, 2011): 155–58. https://doi.org/10.1016/j.mee.2011.04.069.

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We report on the occurrence of strong nonlinear acousto-optic interactions in phoxonic structures, that support, simultaneously, acoustic and optical localized resonant modes, under the influence of acoustic losses. Deploying a detailed theoretical investigation of the acousto-optic coupling in the specific case of a one-dimensional phoxonic cavity, realized by homogeneous SiO2 and Si layers, we demonstrate the possibility for an enhanced modulation of light with sound through multi-phonon exchange mechanisms. A full electrodynamic and elastodynamic multiple scattering approach is employed to
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