Article
Optics
Keren Zhalenchuck, Barak Hadad, Alon Bahabad
Summary: This article demonstrates the operation of an optical conveyor with the geometry of an Archimedes screw, allowing particles to be conveyed along any desired paraxial trajectory.
LASER & PHOTONICS REVIEWS
(2022)
Article
Computer Science, Artificial Intelligence
Beren Millidge, Alexander Tschantz, Christopher L. Buckley
Summary: Backpropagation of error can be approximated using predictive coding, a biologically plausible process theory of cortical computation. This result allows for the translation of core machine learning architectures into predictive coding equivalents, which perform equivalently to backprop on challenging machine learning benchmarks using only local and Hebbian plasticity.
NEURAL COMPUTATION
(2022)
Article
Chemistry, Analytical
Gitae Park, Kisong Lee
Summary: This study investigates the maximization of available energy in an unmanned aerial vehicle (UAV)-aided simultaneous wireless information and power transfer (SWIPT) system. By optimizing the trajectories, transmit power, and power-splitting policies, the proposed scheme outperforms existing baseline schemes in terms of max-min available energy.
Article
Engineering, Mechanical
Ziyuan Zhu, Gang Wang, Zhehao Sheng, Yongfeng Zhang, Ruikang Xu
Summary: This paper proposes a method to predict the acoustic-vibration coupling characteristics of the coupled cavity-ECCDS panel-cavity system for the first time, and investigates the factors affecting the sound insulation performance of the ECCDS panel.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Aerospace
Yu Cheng, Christian Circi, Yijun Lian
Summary: This paper investigates the three-dimensional formation-flying problem in multibody regime using the Hamiltonian structure-preserving (HSP) control strategy. By selecting a low-energy lunar halo transfer orbit as the reference trajectory, the study proposes a topology-type-dependent controller to address stability transitions and demonstrates its validity and robustness through Monte Carlo simulations.
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
(2021)
Article
Engineering, Aerospace
V Rabbani, N. Wu
Summary: In this study, a feedback control strategy is used to enhance sound transmission loss in an infinite thick hollow Piezo-laminated cylinder. Numerical investigations are carried out to analyze the effects of poling direction and feedback gain on the acoustical performance of different piezoelectric materials.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
Yue Chen, Tingchang Wang, Yuxuan Ren, Zhaoxiang Fang, Guangrui Ding, Liqun He, Rongde Lu, Kun Huang
Summary: The concept of Generalized Perfect Optical Vortices (GPOVs) is introduced in this study, which enables the generation of vortex beams with specific topological charges along arbitrary curves. Through theoretical derivation and experimental validation, it is confirmed that GPOVs have unique potential applications in the field of optical vortex beams.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Biodiversity Conservation
Brittany R. Williams, Dominic McAfee, Sean D. Connell
Summary: Marine soundscapes provide navigational cues for dispersing organisms, but with habitat loss, these soundscapes are becoming weaker. Using speakers to create healthy soundscapes can attract larvae and enhance recruitment, improving restoration efforts.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Materials Science, Multidisciplinary
D. Belitz, T. R. Kirkpatrick
Summary: In this study, we used kinetic-theory methods to analyze the Landau Fermi-liquid theory and investigate the soft modes in Fermi liquids in the hydrodynamic and the collisionless regimes. The hydrodynamic regime shows that Fermi-liquid theory is consistent with Navier-Stokes hydrodynamics, while the collisionless regime demonstrates the soft continuous mode and the zero-sound excitations. The two families of soft modes have different physical origins and evolve differently with temperature.
Article
Computer Science, Information Systems
Alessandro Visintini, Tharindu D. Ponnimbaduge Perera, Dushantha Nalin K. Jayakody
Summary: This article explores the use of UAVs to enhance connectivity for users in an overcrowded base station coverage area, optimizing the 3D UAV trajectory to improve communication system efficiency. Results demonstrate that the 3D trajectory achieves significantly higher energy efficiency compared to the 2D trajectory.
Article
Astronomy & Astrophysics
R. C. Batista, H. P. de Oliveira, L. R. W. Abramo
Summary: We study the spherical collapse of non-top-hat matter fluctuations in the presence of dark energy with arbitrary sound speed. We use a pseudo-spectral method with collocation points to solve a system of partial differential equations. This method accurately reproduces known analytical solutions in the linear regime and the virialization threshold given by the usual spherical collapse model. Our findings show the impact of nonlinear dark energy fluctuations on matter profiles, matter peculiar velocity, and gravitational potential. We also highlight the pathological behavior of phantom dark energy models with low sound speed, such as negative energy density around matter halos. Additionally, we calculate the dependence of the virialization threshold density for collapse on the dark energy sound speed, confirming and extending previous results for both homogeneous and clustering dark energy.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Economics
Xiaowei Shi, Xiaopeng Li
Summary: This paper investigates the challenging problem of trajectory planning for autonomous vehicles (AVs) in the presence of conflicting moving objects (CMOs). The study proposes a customized dynamic programming (DP) algorithm that utilizes upper and lower bounds and arriving time constraints to solve the trajectory planning problem efficiently. Numerical experiments demonstrate that the proposed algorithm outperforms a state-of-the-art commercial solver and can generate trajectories in milliseconds, enabling real-time AV control. A real-world case study further validates the potential of the proposed approach in enhancing future traffic systems.
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
(2023)
Article
Acoustics
Jon Young, Kyle Myers
Summary: This paper introduces a scalar quantity called Modification Power (MP) to characterize a structure's response to modifications. Perturbed matrix inversion methods are used to calculate the inverse of the modified impedance matrix, which is numerically better conditioned than direct inversion methods, providing information on the magnitude and direction of power flow changes.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Computer Science, Information Systems
Tongwei Zhang, Lei Yan, Guangjie Han, Yan Peng
Summary: Pairwise ranging between nodes is crucial in IoUT networks, but it is challenging to accurately calculate underwater ranging in actual underwater conditions. This article proposes an underwater acoustic horizontal ranging algorithm that can rapidly and accurately estimate the horizontal range from a sender to a receiver in the deep sea.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Aerospace
Ziwei Yuan, Yanping Yang, Dong Wang, Xiaoping Ma
Summary: This paper investigates a joint safety information interaction scheme for low-altitude UAV-enabled network, which involves trajectory planning, energy efficiency optimization, and physical-layer security. The simulation concludes that the joint optimization of trajectory and power allocation maximizes the information secure energy efficiency.
Article
Acoustics
Shuping Wang, Jiancheng Tao, Xiaojun Qiu, Ian S. Burnett
Summary: This paper proposes a soundproof window for indoor transformers and designs a special silencer for effective noise reduction. Experimental results demonstrate the feasibility of the proposed design.
Article
Acoustics
Jiaxin Zhong, Ray Kirby, Mahmoud Karimi, Haishan Zou, Xiaojun Qiu
Summary: This work investigates the scattering of audio sound generated by a parametric array loudspeaker on a rigid sphere. A computationally efficient method is developed to calculate the sound fields using spherical harmonic expansion. The study reveals the effects of the rigid sphere on the audio sound field and the scattering characteristics of ultrasound.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Ke Xie, Yang Cao, Zijun He, Kangyan Wang, Jie Ding, Ian MacGillivray, Alex Skvortsov, Xiaojun Qiu, Dan Li
Summary: Graphene-based cellular monoliths (GMs) with ultralow density have been synthesized through a simple and cost-effective freeze-casting method. The GMs demonstrate excellent sound absorption properties within a certain density range, while also possessing high mechanical stability, fire retardancy, and thermal insulation capability.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Biochemistry & Molecular Biology
Xiaojun Qiu, Haohan Zhao, Aminu Shehu Abubakar, Deyi Shao, Jikang Chen, Ping Chen, Chunming Yu, Xiaofei Wang, Kunmei Chen, Aiguo Zhu
Summary: This study identified 138 AP2/ERF transcription factors from the ramie genome, revealing unique motifs and promoter elements in different subfamilies, highlighting their importance in growth and stress responses. Twelve key genes positively responded to waterlogging, with five genes also involved in ramet development, suggesting their potential roles in breeding varieties with water stress tolerance and high yield.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Acoustics
Pengju Zhang, Shuping Wang, Hongji Duan, Jiancheng Tao, Haishan Zou, Xiaojun Qiu
Summary: This paper investigates the use of remote acoustic sensing to estimate error signals in human ears without physical microphones. The coherence between signals picked up by physical microphones and the signal obtained at the sphere center is analyzed through numerical simulations and experimental results. The study also discusses the placement of physical microphones for active control of road noise in car cabins.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Shuping Wang, Ziyi Yang, Jiancheng Tao, Xiaojun Qiu, Ian S. Burnett
Summary: An analytical model based on the modal superposition method is proposed to study sound transmission through a slit on a rigid ground. The model accurately predicts the transmission loss (TL) for plane waves with and without the ground. The study reveals that larger slit height generally decreases the TL, except at resonant frequencies. The findings also show that the ground reduces the TL at most frequencies and that the sound transmitted through the slit is almost omnidirectional at low frequencies.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Acoustics
Somanath Pradhan, Guoqiang Zhang, Sipei Zhao, Kenta Niwa, W. Bastiaan Kleijn
Summary: This paper studies the impact of three eigenvalue shaping approaches on the performance of a time-domain two-channel decentralized active noise control (DANC) system. The results show that the eigenvalues of the characteristic matrices in the frequency-domain should be shaped to ensure stability and affect the auxiliary filters in the time-domain. Simulation and experimental results demonstrate the efficacy of the proposed eigenvalue shaping approach and the adaptive filtering technique for controlling various types of noise.
Article
Biochemistry & Molecular Biology
Xiaoyu Huang, Xiaojun Qiu, Yue Wang, Aminu Shehu Abubakar, Ping Chen, Jikang Chen, Kunmei Chen, Chunming Yu, Xiaofei Wang, Gang Gao, Aiguo Zhu
Summary: In this study, 74 AvNAC proteins were identified and classified into 16 subgroups in the A. venetum genome. The AvNACs were shown to be under strong purifying selection, and segmental duplication events played a major role in their expansion. Analysis of cis-elements in the AvNAC promoters revealed dominance of light-, stress-, and phytohormone-responsive elements, and potential TFs in the regulatory network were identified. AvNAC58 and AvNAC69 showed differential expression in response to drought and salt stresses, and their potential roles in trehalose metabolism pathway were confirmed.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Acoustics
Ziyi Yang, Shuping Wang, Jiancheng Tao, Xiaojun Qiu
Summary: An active noise control system is proposed in this paper to reduce sound transmission through a floor-level slit using evenly distributed secondary sources on its top boundary. The system's performance is investigated through analytical and numerical models, and simulation results show a decrease in performance with increasing frequency. The upper limit frequency for effective control increases with more secondary sources and is approximately the interval between the sources when a plane wave is incident normally.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Acoustics
Tianyou Li, Siyuan Lian, Sipei Zhao, Jing Lu, Ian S. Burnett
Summary: This study proposes an Augmented Diffusion FxLMS algorithm, which can effectively reduce noise under different system configurations. Compared to existing distributed multitask diffusion strategies, the proposed algorithm has better noise suppression performance.
IEEE-ACM TRANSACTIONS ON AUDIO SPEECH AND LANGUAGE PROCESSING
(2023)
Proceedings Paper
Automation & Control Systems
Mitchell Cullen, J. C. Ji, Sipei Zhao
Summary: This paper introduces a method for estimating the penetration depth of weld bead using emitted acoustic signal, which can be used for quality monitoring in industrial robotic Gas Metal Arc Welding systems. The method allows for online measurement of penetration depth and shows promising potential as a reliable solution.
2022 IEEE 18TH INTERNATIONAL CONFERENCE ON AUTOMATION SCIENCE AND ENGINEERING (CASE)
(2022)
Proceedings Paper
Acoustics
Sipei Zhao, Ian S. Burnett
Summary: Personal audio systems with multiple sound zones for listeners to enjoy different music/audio contents privately in a shared physical space have attracted great research interest. Acoustic Contrast Control (ACC) is a popular method for generating multiple personal sound zones, but it is inferior to the pressure matching method in terms of sound quality. This paper proposes a time-domain broadband ACC algorithm with a spatial uniformity constraint and a frequency response trend estimation constraint to ensure a uniform sound field distribution in the bright zone.
2022 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)
(2022)
