Results 71 to 80 of about 5,348 (187)

Understanding personalized dynamics to inform precision medicine: a dynamic time warp analysis of 255 depressed inpatients

BMC Medicine, 2020
Background Major depressive disorder (MDD) shows large heterogeneity of symptoms between patients, but within patients, particular symptom clusters may show similar trajectories.
K. Hebbrecht, M. Stuivenga, T. Birkenhäger, M. Morrens, E. I. Fried, B. Sabbe, E. J. Giltay   +6 more
doaj   +1 more source

Improved algorithm of DTW in speech recognition

IOP Conference Series: Materials Science and Engineering, 2019
Abstract This paper improves the Dynamic Time Warping (DTW) algorithm. In order to change the problem of the traditional search range of DTW speech recognition algorithm is too large, an improved DTW algorithm is proposed to limit the search path.
HU Zhi-Qiang, ZHEN Jia-Qi, WANG Xin, LIU Zi-Wei, LIU Yong   +4 more
openaire   +1 more source

AdaPDTW: An Efficient Abstract-Adaptive Piecewise Dynamic Time Warping for Time Series Classification

IEEE Access
Dynamic Time Warping (DTW) offers precise similarity measure but suffers from high computational cost. To address this issue, we propose an abstract-adaptive PAR-DTW, which computes DTW in a low-dimensional piecewise abstract representation (PAR) space ...
Qinglin Cai, Leiying Chen, Jian Shao, Ling Chen   +3 more
doaj   +1 more source

Piecewise Dynamic Time Warping-Based Subsequence Matching in Data Stream

IEEE Access
Dynamic Time Warping (DTW) is effective for subsequence matching but is limited by its high computational cost. To address this challenge, we propose a method that adaptively segments data streams and extracts Chebyshev features for piecewise ...
Qinglin Cai, Leiying Chen, Jian Shao, Ling Chen   +3 more
doaj   +1 more source

Enhancing Nearest Neighbor Classification Performance through Dynamic Time Warping with Progressive Constraint

Proceedings of the International Florida Artificial Intelligence Research Society Conference
Dynamic time warping (DTW) is a widely used metric for comparing time series data, offering elasticity in alignment. While the original DTW allows infinite elasticity without penalty, the wDTW imposes a constant penalty regardless of elastic length.
Sung-Hyuk Cha, Teryn Cha, Teja Vuppu
doaj   +1 more source

The use of geographic information systems and remote sensing to evaluate climate change effect on groundwater: application to Mostaganem Plateau, Northwest Algeria

Acque Sotterranee
Effects of climate change in semi-arid areas occur in drought events, which affect aquifers whose recharge depends essentially on precipitation.
Cherifa Hanene Kamelia Chemirik, Djelloul Baahmed, Rachid Nedjai, Djamel Boudjemline, Ikram Mahcer   +4 more
doaj   +1 more source

Trajectory Similarity Algorithm Based on DTW and Trajectory Point Compression

Kongzhi Yu Xinxi Jishu
The rapid development of technologies including wireless communication, video surveillance, and satellite positioning has led to the generation of substantial amounts of trajectory data from the movement of mobile device holders.
GAO Wei, QIAN Chengyang, ZHANG Qi, XIE Hongquan   +3 more
doaj  

Evaluating walkability across age groups and flooring materials using IMU sensors

Frontiers in Public Health
This study presents a novel approach to quantitatively assess the impact of flooring materials on walkability using Inertial Measurement Unit (IMU) sensors and Dynamic Time Warping (DTW) algorithm.
Daehwi Jo, Hyunsoo Kim
doaj   +1 more source

Assessing the matching degree between environmental loading and GNSS time series with an improved DTW method

Discover Applied Sciences
The GNSS time series is affected by hydrological loading (HYDL) associated with water storage, non-tidal atmospheric loading (NTAL), and non-tidal oceanic loading (NTOL) in the Earth’s surface, potentially leading to time lag phenomena and nonlinear ...
Xiwen Sun, Tieding Lu, Xiaoxing He, Ziyu Wang, Shunqiang Hu, Haicheng Wang, Zhenwu Jin, Huijuan Liu   +7 more
doaj   +1 more source

The clinical characteristics of cerebral small vessel disease patients with motoric cognitive risk syndrome during single- and dual-task walking

Heliyon
Objective: We aimed to (1) identify neuroimaging biomarkers of distinguishing motoric cognitive risk syndrome (MCRS) risk among older Chinese adults with cerebral small vessel disease (CSVD) and (2) detect differences in gait parameters and neuroimaging ...
Hongyang Xie, Nan Zhang, Cuiqiao Xia, Yu Ding, Hongyi Zhao, Yonghua Huang   +5 more
doaj   +1 more source