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A generator of spatio-temporal pseudo-random Gaussian fields that satisfy the "proportionality of scales" property (Tsyroulnikov, 2001) is presented. The generator is based on a third-order in time stochastic differential equation with a…

数据分析、统计与概率 · 物理学 2018-05-15 Michael Tsyrulnikov , Dmitry Gayfulin

For the accurate representation and reconstruction of band-limited signals on the sphere, an optimal-dimensionality sampling scheme has been recently proposed which requires the optimal number of samples equal to the number of degrees of…

信息论 · 计算机科学 2017-09-11 Wajeeha Nafees , Zubair Khalid , Rodney A. Kennedy , Jason D. McEwen

In this paper, we propose a numerical method to approximate the solution of partial differential equations in irregular domains with no-flux boundary conditions by means of spectral methods. The main features of this method are its…

数值分析 · 数学 2007-05-23 Alfonso Bueno-Orovio , Victor M. Perez-Garcia , Flavio H. Fenton

Particle smoothing methods are used for inference of stochastic processes based on noisy observations. Typically, the estimation of the marginal posterior distribution given all observations is cumbersome and computational intensive. In…

机器学习 · 计算机科学 2017-05-24 H. -Ch. Ruiz , H. J. Kappen

Semi-Supervised Domain Adaptation (SSDA) involves learning to classify unseen target data with a few labeled and lots of unlabeled target data, along with many labeled source data from a related domain. Current SSDA approaches usually aim…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Yu-Chu Yu , Hsuan-Tien Lin

Highly lossy nature of metals has severely limited the scope of practical applications of plasmonics. The conventional approach to circumvent this limitation has been to search for new materials with more favorable dielectric properties…

光学 · 物理学 2019-07-11 H. Serhat Tetikol , M. Irsadi Aksun

Non-uniform time stepping in acoustic propagation models can be used to preserve accuracy or reduce computational cost for an acoustic simulation with a wave front propagating through a domain with both heterogeneous and homogenous regions,…

数值分析 · 数学 2025-07-11 Matthew J. King , B. E. Treeby , B. T. Cox

We introduce Multi-Source 3D (MS3D), a new self-training pipeline for unsupervised domain adaptation in 3D object detection. Despite the remarkable accuracy of 3D detectors, they often overfit to specific domain biases, leading to…

计算机视觉与模式识别 · 计算机科学 2023-05-10 Darren Tsai , Julie Stephany Berrio , Mao Shan , Eduardo Nebot , Stewart Worrall

The finite-difference time-domain (FDTD) method is applied for modelling of wire media as artificial dielectrics. Both frequency dispersion and spatial dispersion effects in wire media are taken into account using the auxiliary differential…

材料科学 · 物理学 2009-11-11 Yan Zhao , Pavel Belov , Yang Hao

The aim of two-dimensional line spectral estimation is to super-resolve the spectral point sources of the signal from time samples. In many associated applications such as radar and sonar, due to cut-off and saturation regions in electronic…

信息论 · 计算机科学 2020-01-08 Iman Valiulahi , Farzan Haddadi , Arash Amini

Test Time Adaptation (TTA) is a pivotal concept in machine learning, enabling models to perform well in real-world scenarios, where test data distribution differs from training. In this work, we propose a novel approach called pseudo Source…

计算机视觉与模式识别 · 计算机科学 2023-11-23 Manogna Sreenivas , Goirik Chakrabarty , Soma Biswas

Smoothed Dissipative Particle Dynamics (SDPD) is a mesoscopic particle method which allows to select the level of resolution at which a fluid is simulated. The numerical integration of its equations of motion still suffers from the lack of…

统计力学 · 物理学 2017-10-25 Gérôme Faure , Gabriel Stoltz

We present a robust approach to incorporating models for the time-variable broadening of the pulse profile due to scattering in the ionized interstellar medium into profile-domain pulsar timing analysis. We use this approach to…

天体物理仪器与方法 · 物理学 2017-04-12 L. Lentati , M. Kerr , S. Dai , R. M. Shannon , G. Hobbs , S. Oslowski

Existing pseudo label generation methods for point weakly supervised object detection are inadequate in low data volume and dense object detection tasks. We consider the generation of weakly supervised pseudo labels as the model's sparse…

计算机视觉与模式识别 · 计算机科学 2024-12-31 Chuyang Shang , Tian Ma , Wanzhu Ren , Yuancheng Li , Jiayi Yang

The paper aims at removing the aliasing effects of the whole focal stack generated from a sparse-sampled {4D} light field, while keeping the consistency across all the focal layers. We first explore the structural characteristics embedded…

图像与视频处理 · 电气工程与系统科学 2022-04-04 Yaning Li , Xue Wang , Hao Zhu , Guoqing Zhou , Qing Wang

Non-autoregressive text to speech (NAR-TTS) models have attracted much attention from both academia and industry due to their fast generation speed. One limitation of NAR-TTS models is that they ignore the correlation in time and frequency…

音频与语音处理 · 电气工程与系统科学 2022-03-01 Yi Ren , Xu Tan , Tao Qin , Zhou Zhao , Tie-Yan Liu

We propose a time-domain audio source separation method using down-sampling (DS) and up-sampling (US) layers based on a discrete wavelet transform (DWT). The proposed method is based on one of the state-of-the-art deep neural networks,…

声音 · 计算机科学 2022-12-05 Tomohiko Nakamura , Hiroshi Saruwatari

Multi-source domain adaptation (MDA) aims to transfer knowledge from multiple source domains to an unlabeled target domain. MDA is a challenging task due to the severe domain shift, which not only exists between target and source but also…

机器学习 · 计算机科学 2022-02-23 Ren Chuan-Xian , Liu Yong-Hui , Zhang Xi-Wen , Huang Ke-Kun

Deploying 3D detectors in unfamiliar domains has been demonstrated to result in a significant 70-90% drop in detection rate due to variations in lidar, geography, or weather from their training dataset. This domain gap leads to missing…

计算机视觉与模式识别 · 计算机科学 2024-08-16 Darren Tsai , Julie Stephany Berrio , Mao Shan , Eduardo Nebot , Stewart Worrall

Spatially localized structures are key components of turbulence and other spatio-temporally chaotic systems. From a dynamical systems viewpoint, it is desirable to obtain corresponding exact solutions, though their existence is not…

混沌动力学 · 物理学 2014-05-21 Toshiki Teramura , Sadayoshi Toh