Multi-scale entropy (MSE) was developed as a measure of complexity for complex time series, and it has been applied widely in recent years. The MSE algorithm is based on the assumption that biological systems possess the ability to adapt and function in an ever-changing environment, and these systems need to operate across multiple temporal and spatial scales, such that their complexity is also multi-scale and hierarchical. Here, we present a systematic approach to apply the empirical mode decomposition algorithm, which can detrend time series on various time scales, prior to analysing a signal's complexity by measuring the irregularity of its dynamics on multiple time scales. Simulated time series of fractal Gaussian noise and human heartbeat time series were used to study the performance of this new approach. We show that our method can successfully quantify the fractal properties of the simulated time series and can accurately distinguish modulations in human heartbeat time series in health and disease.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1098/rsta.2015.0204 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Statin Use With Immune Checkpoint Inhibitors and Survival in Nonsmall Cell Lung Cancer.
Clin Lung Cancer
December 2024
Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD.
Objective: To determine the association between concurrent statin use with immune checkpoint inhibitors (ICIs) and lung cancer-specific and overall mortality in patients with nonsmall cell lung cancer (NSCLC).
Materials And Methods: SEER-Medicare was used to conduct a retrospective study of Medicare beneficiaries ≥65 years of age diagnosed with NSCLC between 2007 and 2017 treated with an ICI. Patients were followed from date of first ICI claim until death, 1 month from last ICI claim, or 12/31/2018, whichever came first.
Dynamic event-triggered tolerant containment control protocol for discrete multiagent systems based on finite index policy iteration algorithm.
ISA Trans
January 2025
Department of Electrical and Computer Engineering, National University of Singapore, 117538, Singapore. Electronic address:
For tolerant containment control of multi-agent systems, considering the challenges in modeling and the impact of actuator faults on system security and reliability, a finite index dynamic event-triggered policy iteration algorithm is proposed. This algorithm only requires input and output data, without relying on system models, and simultaneously considers the faults and energy consumption issues to improve the system reliability and save energy consumption. The conditions are provided to demonstrate the convergence and optimality of the algorithm, including a convergence speed, that is, the number of iterations required for convergence is finite.
View Article and Find Full Text PDFDifferences in dialysis modality choice between immigrant and native populations in Barcelona, Spain.
Nefrologia (Engl Ed)
January 2025
Servicio de Nefrología, Hospital del Mar, Instituto Hospital del Mar de Investigaciones Médicas, RD16/0009/0013 (ISCIII FEDER REDinREN), Barcelona, Spain; Servicio de Nefrología, Hospital Universitario 12 de Octubre, Madrid, Spain.
Few studies have analyzed the freedom to choose their renal replacement treatment (RRT) modality in Spain. In a total of 673 patients with ACKD (stage 4 and 5) seen at the outpatient ACKD clinic of Hospital del Mar, Barcelona, Catalonia (Spain) from 2009 to 2020, we retrospectively compared immigrant and Spanish patients in order to analyze the impact of migration on RRT decision-making and its subsequent evolution in advanced CKD (ACKD) consultation and identifies the social and economic needs of this population. One hundred thirteen (16.
View Article and Find Full Text PDFOsmoregulation affects elimination of microplastics in fish in freshwater and marine environments.
Sci Total Environ
January 2025
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8563, Chiba, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa 277-8564, Chiba, Japan.
In recent decades, microplastics (MPs) have emerged as one of the biggest environmental challenges in aquatic environments. Ingestion and toxicity of MPs in seawater (SW) and freshwater (FW) fish have been studied extensively both in field and laboratory settings. However, the basic mechanism of how fish deal with MPs in SW and FW remains unclear, although physiological conditions of fish differ significantly in the two environments.
View Article and Find Full Text PDFGenome-wide identification and expression analysis of the BBX gene family in Lagerstroemia indica grown under light stress.
Int J Biol Macromol
January 2025
Hunan Key Laboratory for Breeding of Clonally Propagated Forest Trees, Hunan Academy of Forestry, Changsha, Hunan 410004, China. Electronic address:
B-box proteins (BBX) play pivotal roles in the regulation of numerous growth and developmental processes in plants, particularly the light-mediated biosynthesis of pigments. To elucidate the role of BBX transcription factors in the anthocyanin biosynthetic pathway of Lagerstroemia indica leaves, this study identified 41 BBX genes in the L. indica genome.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!