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The Helmholtz Machine

Neural Computation, 1995
Discovering the structure inherent in a set of patterns is a fundamental aim of statistical inference or learning. One fruitful approach is to build a parameterized stochastic generative model, independent draws from which are likely to produce the patterns.
Dayan, P.   +3 more
openaire   +4 more sources

Molecular Helmholtz coils

Journal of Chemical Physics, 2019
How to build a molecular Helmholtz coil? The possibility to create a Helmholtz coil at the molecular level is studied via the induced magnetic responses of several small cyclic hydrocarbon dimers with formula (CnHn)2 and Dnh symmetry (n = 6–10). Our results reveal that for n ≥ 8, π-electrons give rise to a uniform magnetic field within the central ...
Mesias Orozco-Ic   +2 more
exaly   +3 more sources

Perfect low-frequency sound absorption of rough neck embedded Helmholtz resonators.

Journal of the Acoustical Society of America, 2022
In this paper, an acoustic metamaterial, composed of rough neck embedded Helmholtz resonators, is proposed to achieve perfect sound absorption in the low-frequency range.
Lei Zhang, F. Xin
semanticscholar   +1 more source

Tunable underwater acoustic metamaterials via quasi-Helmholtz resonance: From low-frequency to ultra-broadband

, 2021
We report a lightweight tunable acoustic metamaterial with deep subwavelength thickness (e.g., λ / 300) and strong load-bearing capability for underwater low-frequency and ultra-broadband acoustic perfect absorption.
Mingyu Duan   +3 more
semanticscholar   +1 more source

Gradually perforated porous materials backed with Helmholtz resonant cavity for broadband low-frequency sound absorption

, 2021
Conventional sound absorbers can hardly own the good performance of low-frequency and broadband absorption simultaneously. In order to combine these two functions into one kind of absorbers, the gradually perforated porous materials backed with Helmholtz
Liu Xuewei, Chenlei Yu, F. Xin
semanticscholar   +1 more source

Metamaterial and Helmholtz coupled resonator for high-density acoustic energy harvesting

, 2021
High-density acoustic energy harvesting is one of the power solutions for wireless sensor network nodes in the Internet of Things. In this paper, we present a novel metamaterial and Helmholtz coupled resonator (MHCR) to enhance the sound energy density ...
Kejing Ma   +5 more
semanticscholar   +1 more source

Dual‐Tube Helmholtz Resonator‐Based Triboelectric Nanogenerator for Highly Efficient Harvesting of Acoustic Energy

Advanced Energy Materials, 2019
An acoustic wave is a type of energy that is clean and abundant but almost totally unused because of its very low density. This study investigates a novel dual‐tube Helmholtz resonator‐based triboelectric nanogenerator (HR‐TENG) for highly efficient ...
Xiu Xiao, Peng Xu, Tiancong Zhao
exaly   +2 more sources

On the modelling of membrane-coupled Helmholtz resonator and its application in acoustic metamaterial system

Mechanical Systems and Signal Processing, 2019
In recent years, the Helmholtz resonator and membrane are two popular elements that have been vastly employed in the design of energy harvesters and metamaterials.
Guobiao Hu, Lihua Tang
exaly   +2 more sources

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