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Recent advances in the chirplet transform and wavelet-chirplet transform (WCT) have enabled the estimation of instantaneous frequencies (IFs) and chirprates, as well as mode retrieval from multicomponent signals with crossover IF curves.…

信号处理 · 电气工程与系统科学 2025-08-26 Qingtang Jiang , Shuixin Li , Jiecheng Chen , Lin Li

Atmospheric correction of Earth Observation data is one of the most critical steps in the data processing chain of a satellite mission for successful remote sensing applications. Atmospheric Radiative Transfer Models (RTM) inversion methods…

信号处理 · 电气工程与系统科学 2020-12-09 Jorge Vicent , Luis Alonso , Luca Martino , Neus Sabater , Jochem Verrelst , Gustau Camps-Valls

This article presents a new approach for the wireless clock synchronization of Decawave ultra-wideband transceivers based on the time difference of arrival. The presented techniques combine the time-of-arrival and time-difference-of-arrival…

信号处理 · 电气工程与系统科学 2019-03-05 Juri Sidorenko , Volker Schatz , Norbert Scherer-Negenborn , Michael Arens , Urs Hugentobler

According to general relativity theory (GRT), by comparing the frequencies between two precise clocks at two different stations, the gravity potential (geopotential) difference between the two stations can be determined due to the gravity…

地球物理 · 物理学 2022-01-19 Kuangchao Wu , Wen-Bin Shen , Xiao Sun , Chenghui Cai , Ziyu Shen

We consider the problem of fitting a parametric model to time-series data that are afflicted by correlated noise. The noise is represented by a sum of two stationary Gaussian processes: one that is uncorrelated in time, and another that has…

地球与行星天体物理 · 物理学 2014-11-20 Joshua A. Carter , Joshua N. Winn

Stationary Wavelet Transform (SWT) is an efficient tool for edge analysis. This paper a new edge detection technique using SWT based Hidden Markov Model (WHMM) along with the expectation-maximization (EM) algorithm is proposed. The SWT…

图像与视频处理 · 电气工程与系统科学 2020-04-24 S. Anand , K. Nagajothi , K. Nithya

To improve diagnostic accuracy of breast cancer detection, several researchers have used the wavelet-based tools, which provide additional insight and information for aiding diagnostic decisions. The accuracy of such diagnoses, however, can…

统计方法学 · 统计学 2022-01-25 Minkyoung Kang , William Auffermann , Brani Vidakovic

Cross-view video geo-localization (CVGL) aims to derive GPS trajectories from street-view videos by aligning them with aerial-view images. Despite their promising performance, current CVGL methods face significant challenges. These methods…

计算机视觉与模式识别 · 计算机科学 2024-08-07 Manu S Pillai , Mamshad Nayeem Rizve , Mubarak Shah

The gravitational-wave (GW) detections reported by the LIGO-Virgo-KAGRA (LVK) collaboration have so far been consistent with quasi-circular compact binary coalescences (CBCs). Nevertheless, a small fraction of binaries driven to merge…

广义相对论与量子宇宙学 · 物理学 2026-03-02 Priscilla Canizares , Seppe J. Staelens , Isobel Romero-Shaw

Ultra-wideband (UWB) time-difference-of-arrival (TDOA)-based localization has emerged as a promising, low-cost, and scalable indoor localization solution, which is especially suited for multi-robot applications. However, there is a lack of…

机器人学 · 计算机科学 2024-02-06 Wenda Zhao , Abhishek Goudar , Xinyuan Qiao , Angela P. Schoellig

Since flight delay hurts passengers, airlines, and airports, its prediction becomes crucial for the decision-making of all stakeholders in the aviation industry and thus has been attempted by various previous research. However, previous…

机器学习 · 计算机科学 2024-10-08 Ke Liu , Kaijing Ding , Xi Cheng , Guanhao Xu , Xin Hu , Tong Liu , Siyuan Feng , Binze Cai , Jianan Chen , Hui Lin , Jilin Song , Chen Zhu

Assessing the probability that two or more gravitational waves (GWs) are lensed images of the same source requires an understanding of the image properties, including their relative phase shifts in strong lensing (SL). For non-precessing,…

广义相对论与量子宇宙学 · 物理学 2021-03-31 Jose María Ezquiaga , Daniel E. Holz , Wayne Hu , Macarena Lagos , Robert M. Wald

Urbanization, climate change, and agricultural stress are increasing the demand for precise and timely environmental monitoring. Land Surface Temperature (LST) is a key variable in this context and is retrieved from remote sensing…

计算机视觉与模式识别 · 计算机科学 2025-12-11 Sofiane Bouaziz , Adel Hafiane , Raphael Canals , Rachid Nedjai

Recently the synchrosqueezed transform (SST) was developed as an empirical mode decomposition (EMD)-like tool to enhance the time-frequency resolution and energy concentration of a multi-component non-stationary signal and provides more…

数值分析 · 数学 2020-12-29 Charles K. Chui , Qingtang Jiang , Lin Li , Jian Lu

To achieve high data rates defined in 5G, the use of millimeter-waves and massive-MIMO are indispensable. To benefit from these technologies, an accurate estimation of the channel parameters is crucial. We propose a novel two-stage…

信号处理 · 电气工程与系统科学 2020-07-15 Fazal-E-Asim , Felix Antreich , Charles C. Cavalcante , André L. F. de Almeida , Josef A. Nossek

Abrupt change detection based on the wavelet transform and threshold method is very effective in detecting the abrupt changes and hence segmenting the signals recorded during disturbances in the electrical power network. The wavelet method…

其他计算机科学 · 计算机科学 2015-03-20 A. Ukil , R. Zivanovic

Full Waveform Inversion (FWI) is a powerful technique for estimating high-resolution subsurface velocity models by minimizing the discrepancy between modeled and observed seismic data. However, the oscillatory nature of seismic waveforms…

A reexamination of period finding algorithms is prompted by new large area astronomical sky surveys that can identify billions of individual sources having a thousand or more observations per source. This large increase in data necessitates…

天体物理仪器与方法 · 物理学 2025-02-05 Douglas P. Finkbeiner , Thomas A. Prince , Samuel E. Whitebook

The wavelet transform has been used for numerous studies in astrophysics, including signal--noise periodicity and decomposition as well as the signature of differential rotation in stellar light curves. In the present work, we apply the…

太阳与恒星天体物理 · 物理学 2010-09-28 D. B. de Freitas , I. de C. Leão , B. L. Canto Martins , J. R. De Medeiros

The Local Position Measurement system (LPM) is one of the most precise systems for 3D position estimation. It is able to operate in- and outdoor and updates at a rate up to 1000 measurements per second. Previous scientific publications…

信号处理 · 电气工程与系统科学 2018-02-07 Juri Sidorenko , Norbert Scherer-Negenborn , Eckart Michaelsen , Michael Arens