Recurrence Plots

sciencedirect.comThe friendship quotient: A measure of local neighborhood persistence in reconstructed phase spaceComplex signals are commonly characterized using measures of irregularity, recurrence, and predictability. Although recurrence-based methods quantify …

Friendship Quotient (FQ): how long phase‑space neighbors stay together – a recurrence‑like measure complementing #recurrence_quantification_analysis determinism. Tracks period‑doubling, stochastic transitions, and captures cognitive and seizure changes in EEG. www.sciencedirect.com/science/arti...

link.springer.comA high-dimensional independence test based on recurrence rates via practical metric selection with an application to spatio-temporal precipitation in Uruguay - The European Physical Journal Special To...This study addresses the problem of testing for independence when at least one of the variables is high-dimensional. We present a methodological framework built upon an existing independence test util...

New multi-distance independence test built on #recurrence_plot recurrence rates reveals country-wide rainfall dependence in Uruguay – where Euclidean distance fails, Minkowski and Canberra distances succeed. link.springer.com/article/10.1...

The next #recurrence_plot symposium will be in Maastricht, he Netherlands (August 18–20, 2027) symposium.recurrence-plot.tk

news.mit.eduMargaret Hamilton, computing pioneer who led software development for the Apollo program, dies at 90Margaret H. Hamilton, a profoundly influential computer scientist best known for leading the software engineering team at MIT’s Instrumentation Lab during NASA’s Apollo program, died at age 90.

Margaret Hamilton (known for leading the Apollo flight software team), one of the original programmers for the famous Lorenz'model has died aged 90. news.mit.edu/2026/margare...

NeuroPrint converts multimodal MRI into one spatial #recurrence_plot for CNN-based stroke classification, reaching F1 = 85.4% with about 3× lower memory than intermediate fusion. www.sciencedirect.com/science/arti...

journals.aps.orgNest-Level Phase Transition Drives Synchronized Activity Bursts in Ant ColoniesBursts of synchronized activity in ant colonies can be characterized as a phase transition, emerging as a balance between the responsiveness of the colony to the activation of a single ant and its abi...

Ant colonies' synchronized activity bursts emerge as a nest-level phase transition, sparked by a single "first mover". #recurrence_plot determinism serves as a shape-agnostic measure of the synchrony. journals.aps.org/prxlife/abst...

link.springer.comDamage Evolution of Limestone Under Chemically Assisted Wet–Dry Cycles: An Integrated Analysis Using Recurrence Quantification, Machine Learning and Chemical Modeling - Rock Mechanics and Rock Enginee...Periodic reservoir drawdown causes repeated wet–dry cycles in the drawdown zone, leading to pronounced changes in rock mechanical properties and potential instability. Because the Yangtze River water ...

Chemically assisted wet-dry cycling drives limestone strength degradation in reservoir drawdown zones – found using acoustic emission and #recurrence_quantification_analysis to show Na2SO4/NaCl accelerate damage while NaOH suppresses it via enhanced Ca2+ adsorption. link.springer.com/article/10.1...

Study reveals co-flow conditions can suppress self-excited thermoacoustic oscillations in laminar Rijke-tube flames – with Wayland method and #recurrence_plot analysis showing abrupt low-Φ onset versus gradual high-Φ suppression of the oscillation dynamics. www.sciencedirect.com/science/arti...

17 Sept

New framework diagnoses semantic drift in vocabulary networks – combining functional graphs with Koopman operator theory, using #recurrence_plot entropy and spectral drift index as indicators; validated on synthetic graphs. www.sciencedirect.com/science/arti...

14 Sept

New Cosine Similarity Order #recurrence_plot method (CSORPs) improves noise resistance over traditional order pattern recurrence plots — powering a motif network (CSORMN) that effectively detects and localizes myocardial infarction from 12-lead ECGs. www.sciencedirect.com/science/arti...

11 Sept

New study reveals a multiple-torus intermittency route to hidden strange nonchaotic attractors in piecewise-smooth systems – characterized via #recurrence_plot topology, Lyapunov exponents, and phase sensitivity, with no equilibrium points involved. www.sciencedirect.com/science/arti...

link.springer.comNeural dynamic diversity assessment via recurrence quantification analysis in a hardware-efficient FPGA implementation of the Chialvo neuron map - Journal of Computational ElectronicsThe discrete neuron map models require no discretization process, and they provide favorable design for digital equipment-based neuromorphic systems compared to their continuous counterparts. However,...

9 Sept

Simplified Chialvo neuron map model eases FPGA implementation for neuromorphic hardware – #recurrence_quantification_analysis confirms it preserves the original's neural dynamic diversity. link.springer.com/article/10.1...

journals.aps.orgSpinning charged test particle dynamics around a Schwarzschild black hole embedded in a homogeneous magnetic fieldWe study the dynamics of spinning charged test particles orbiting a Schwarzschild black hole immersed in a test uniform magnetic field. This setup provides a simple but physically relevant framework f...

7 Sept

Spinning charged particles orbiting a magnetized Schwarzschild black hole show chaotic dynamics – revealed via 4D Poincaré sections and #recurrence_plot analysis, disentangling spin-curvature and Lorentz-force effects. journals.aps.org/prd/abstract...

4 Sept

New ~67-Myr astrochronology dates the Ediacaran Shuram excursion in South China, using gamma-ray #recurrence_plot determinism to segment sedimentation-rate changes – revealing a heterogeneous, sea-level-paced pattern of oceanic oxygenation. www.sciencedirect.com/science/arti...

Recurrence Plots reposted

3 Sept

We organised a special session on #recurrence_plot analysis at the EUSIPCO 2026 – to bring this method to the signal processing people … Thanks to all speakers and to Martijn for the organisation! eusipco2026.org

ieeexplore.ieee.orgieeexplore.ieee.org

2 Sept

Non-intrusive ultrasonic method estimates hydraulic turbine operating regime – using phase diagrams and #recurrence_plot analysis on Kaplan turbine data to track proximity to the Best Efficiency Point and flag hydrodynamic instabilities. ieeexplore.ieee.org/document/115...

Recurrence Plots reposted

Andrej Spiridonov

@andrejpaleo.bsky.social

2 Sept

#Bretskyan_hierarchy perspective on the Neanderthal dispersal capacities through the glacial-interglacial times. www.nature.com/articles/s43... East-west dispersal zone seems immutable through tens of thousands of years, including historical times. 🧪⚒️ #Geology #Paleobio

nature.comQuantifying mutual hesitation and identifying kinematic predictors in near-collision avoidance in walking - Scientific ReportsScientific Reports - Quantifying mutual hesitation and identifying kinematic predictors in near-collision avoidance in walking

1 Sept

New research quantifies mutual hesitation in pedestrian collision avoidance with cross- #recurrence_quantification_analysis – smaller head-angle differences shortly before avoidance onset predict more mutual hesitation between walkers. www.nature.com/articles/s41...

nature.comRole of interpersonal tactile and visual interaction in modulating postural sway and enhancing stability - Scientific ReportsScientific Reports - Role of interpersonal tactile and visual interaction in modulating postural sway and enhancing stability

29 Aug

Study finds touch and visual contact both reduce postural sway during quiet standing, but shape sway dynamics differently – #recurrence_quantification_analysis shows touch alters recurrence and scaling more, while visual coupling mainly affects longer-timescales. www.nature.com/articles/s41...

Recurrence Plots reposted

sciencedirect.comReconstruction of interpretable causal network dynamics from time series dataReconstructing causal dynamic networks from multivariate time series is a foundational problem in complex systems science. Yet, the key scientific iss…

27 Aug

New Physics Reports paper out: "Reconstruction of interpretable causal network dynamics from time series data" including #recurrence_plot methods. 😃 free read: authors.elsevier.com/c/1ngh71KAVt... www.sciencedirect.com/science/arti...

link.springer.comScale-dependent coupling and directional causality in solar–wind dynamics - The European Physical Journal PlusThis study investigates scale–dependent coupling and directional causality among solar–wind proton density, temperature, and speed using cross–multifractal and nonlinear dynamical analyses. The multif...

26 Aug

ECG alone can classify surgical trainees' workload during laparoscopic tasks — outperforming HRV-based models, with #recurrence_plot features adding value on some secondary measures. www.mdpi.com/1424-8220/26...

Study reveals thermokinetic coupling hierarchy in the solar wind: multifractal cross-correlation and joint #recurrence_quantification_analysis show proton temperature–speed pairs have the strongest synchronization, with speed as the information sink. link.springer.com/article/10.1...

link.springer.comReal-time recurrence plot and quantification analysis on FPGA for embedded nonlinear dynamics - The European Physical Journal Special TopicsRecurrence plots (RPs) and recurrence quantification analysis (RQA) are powerful tools for analysing the temporal behaviour of dynamical systems, but their high computational cost limits their use in ...

22 Aug

New FPGA architecture computes #recurrence_plot and RQA measures directly in hardware, delivering 10x+ speedup over CPU methods without precision loss – enabling real-time, energy-efficient recurrence analysis for biomedical, vibration, and environmental sensing. link.springer.com/article/10.1...

link.springer.comA synergetic perspective of analysing phase space dynamics: the crucial role of recurrence - The European Physical Journal Special TopicsHermann Haken’s synergetics provides a fundamental theoretical framework for understanding the emergence of macroscopic order from microscopic interactions in complex dynamical systems. In this paper,...

19 Aug

"A synergetic perspective of analysing phase space dynamics: the crucial role of recurrence" – links Haken's synergetics with #recurrence_plot analysis, revealing order-chaos transitions in phase-space dynamics and ties to machine learning for predictive modelling. link.springer.com/article/10.1...

Recurrence Plots reposted

link.springer.comDetection of crack on Euler–Bernoulli beam using recurrence quantification analysis - The European Physical Journal Special TopicsThe current work presents a thorough nonlinear framework, for initial crack detection and characterization in an Euler–Bernoulli beam, with breathing cracks, using a hybrid of the Mathieu–Duffing form...

18 Aug

Our collaborators from Cameroon published a study on monitoring engineered structures: "Detection of crack on Euler–Bernoulli beam using recurrence quantification analysis" link.springer.com/article/10.1...

Recurrence Plots reposted

Andrej Spiridonov

@andrejpaleo.bsky.social

4 Aug

Glad to share our new study at @natcomms.nature.com which resulted from several workshops on the early warning signs of mass extinctions and coordination of macroevolutionary vulnerability and the states of carbon cycle and temperatures. www.nature.com/articles/s41... 🧪⚒️ #Geology #Paleobio #EvoBio

Recurrence Plots reposted

Tiago Peixoto

@tiago.skewed.de

29 July

The carnage of brute force “intelligence”. futurism.com/artificial-i...

futurism.comAI Companies Are Buying Antique Books, Ingesting Their Contents to Train Models, and Then Destroying Them at Incredible Scale, Even If Almost No Copies RemainAI companies are quietly obtaining rare books, ingesting their contents, and then destroying them -- even if they're exceedingly rare.

link.springer.comPolar recurrence plots on Collatz sequences devoid of exact recurrences - The European Physical Journal Special TopicsThe Collatz conjecture has long attracted mathematical interest because its simple rules give rise to complicated patterns resembling physical processes such as diffusion, random walks, dispersion of ...

24 July

Study analyzes Collatz trajectories in polar recurrence space using #recurrence_plot quantifiers, finding no structural differences between prime/anti-prime or odd/even seeded sequences — suggesting Collatz dynamics behave as rule-based yet random-like processes. link.springer.com/article/10.1...

link.springer.comAn optimized Python library for analyzing dynamical systems with recurrence microstates - The European Physical Journal Special TopicsRecurrence analysis techniques based on recurrence plots (RPs) have become a standard tool for the study of dynamical systems, offering means to quantify nonlinear characteristics from time series and...

23 July

New Python library speeds up recurrence microstates analysis, a fast complementary approach to #recurrence_quantification_analysis and #recurrence_plot analysis – cutting computation time substantially and enabling energy-efficient, large-scale time series analysis. link.springer.com/article/10.1...

link.springer.comAccRQA library: accelerating recurrence quantification analysis - The European Physical Journal Special TopicsRecurrence quantification analysis is a powerful tool for identifying and quantifying patterns in dynamical systems, widely used across many disciplines. The rapid growth of data in these fields deman...

20 July

AccRQA: a new high-performance #recurrence_quantification_analysis library (Python/R/C++) with OpenMP + GPU support, delivering 6–10× speed-ups over existing RQA packages while scaling to long time series across CPUs and HPC/GPU environments. link.springer.com/article/10.1...

link.springer.comCombinatorial time-loops: probabilistic inference on time-series based on recurrence analysis with symbolic methods - The European Physical Journal Special TopicsRecurrence quantification analysis (RQA) is inspired by Poincaré’s early studies and describes non-linear characteristics of dynamical systems. It achieves this by identifying similarities between sta...

17 July

Open-source in AnalyticComb.jl and SymbolicInference.jl.

Recurrence Plots@recurrence-plot.tk

New symbolic-combinatorics framework enables exact-probability inference on small datasets in #recurrence_quantification_analysis – detecting significant motifs across noisy periodic signals, AR processes, and chaotic systems. link.springer.com/article/10.1...

Researchers find that #recurrence_quantification_analysis separates stable from unstable periods in 100 crypto assets, uncovers hidden nonlinearities and works on FinTech indices – offering investors and regulators a clear risk gauge.  link.springer.com/article/10.1...

link.springer.comNonlinear dynamics in cryptocurrency markets: a recurrence quantification analysis approach - Financial InnovationThis paper introduces Recurrence Quantification Analysis (RQA) as a robust, interpretable framework to evaluate the dynamic behavior of cryptocurrency markets. Using optimized recurrence plot threshol...

ieeexplore.ieee.orgieeexplore.ieee.org

13 July

New method turns stator currents into images via empirical wavelet transform #recurrence_plot (EWT-RP), distilling knowledge from simulations to diagnose asynchronous motor faults despite scarce labeled data. ieeexplore.ieee.org/document/113...

jrsr.sums.ac.irjrsr.sums.ac.ir

10 July

Elite wrestlers show more consistent yet more complex neuromuscular patterns than sub-elite ones — study uses #recurrence_quantification_analysis of EMG signals during a tie-up drill to reveal expertise-related motor dynamics. jrsr.sums.ac.ir/article_5155...

Recurrence Plots reposted

Our collaborators published "An optimized Python library for analyzing dynamical systems with recurrence microstates" – link.springer.com/article/10.1... #recurrence_plot

Recurrence Plots reposted

Real Al Bundy

@realalbundy.bsky.social

Die deutsche Autoindustrie hat das unfassbare Kunststück fertiggekriegt, sich durch Lobbyismus und korrupte Politiker selbst zugrunde zu richten.

The threshold selection procedure is quite promising!

Recurrence Plots@recurrence-plot.tk

Power slip ring wear mechanisms identified via threshold-optimized #recurrence_plot analysis achieving 98.68% accuracy with strong noise robustness and generalization. www.sciencedirect.com/science/arti...

sciencedirect.comStochastic and dynamical properties of 1/f current noise in conductorsCurrent time series measured from carbon fibers and transistors exhibit irregular fluctuations and often show 1/f power spectra. However, it remains u…

7 July

1/f current fluctuations in carbon fibers distinguished as linear stochastic via recurrence triangle statistics rather than deterministic chaos #recurrence_plot www.sciencedirect.com/science/arti...

iopscience.iop.orgMonitoring chaotic behavior in switched reluctance motors: implementing numerical and signal processing based chaos analysis techniques and development of a real-time chaos detection algorithmMonitoring chaotic behavior in switched reluctance motors: implementing numerical and signal processing based chaos analysis techniques and development of a real-time chaos detection algorithm, Aman, ...

4 July

SRM (Switched reluctance motors) chaotic dynamics characterized via #recurrence_plot and multiple chaos indices; real-time monitoring algorithm deployed for operating drives enabling early detection of undesirable erratic dynamics in SRM drives. iopscience.iop.org/article/10.1...

journals.aps.orgComparison of the performance of features based on symbolic dynamics and recurrence microstates for time series classificationSymbolization is a well-established tool to transform a time series into a sequence of symbols. Here, we compare two symbolization approaches: recurrence microstate (RM), based on recurrence patterns ...

3 July

New research compares recurrence microstates (RM) and symbolic dynamics (SD) for time-series analysis. RM delivers higher accuracy, while combining RM and SD provides the best overall performance for parameter estimation and ECG classification. #recurrence_plot journals.aps.org/prresearch/a...

Recurrence Plots reposted

zenodo.orgComparison of calculation speed for recurrence plots/ recurrence quantification analysis for MATLAB, R, Python, and JuliaScripts designed to compare the performance of Julia, Python, R, and MATLAB in computing recurrence plots and conducting recurrence quantification analysis.

2 July

extended speed test available at zenodo.org/records/1894...

Norbert Marwan@pucicu.de

Do you need a really fast #recurrence_quantification_analysis? You might want to check out accRQA, the fastest library as far as I know. I'm happy to be part of this exciting endeavour! Just published: link.springer.com/article/10.1...

Recurrence Plots reposted

Electric Parking Brake faults were diagnosed via #recurrence_quantification_analysis of vibration signals "The proposed method allows efficient fault detection without disassembling the EPB unit, thus reducing remanufacturing costs and downtime". #recurrence_plot link.springer.com/article/10.1...

link.springer.comNon-destructive diagnostics of electric parking brake modules using recurrence analysis of piezoelectric sensor data - The European Physical Journal Special TopicsThis paper presents a non-invasive diagnostic approach for Electric Parking Brake (EPB) modules based on recurrence quantification analysis (RQA) of piezoelectric vibration data. Vibration signals wer...

iopscience.iop.orgLong-term Dynamical Evolution and Ejection of Near-Earth AsteroidsLong-term Dynamical Evolution and Ejection of Near-Earth Asteroids, Bora, Chetan Abhijnanam, Kushvah, Badam Singh, Saha, Kanak

28 June

Asteroid orbital dynamics classified via CNNs trained on #recurrence_plot; chaotic motion signatures captured with scalable machine learning alternative. iopscience.iop.org/article/10.3...

doi.orgEarly detection of Hopf bifurcations in a prototypical fluid system via deep learning of unbinarized recurrence plotsWe explore whether deep learning of unbinarized recurrence plots (RPs) can provide early warning signals for the onset of limit-cycle oscillations. We consider

17 June

Deep learning of "unbinarized #recurrence_plot" (yet another name for the distance matrix 😬) predicts Hopf bifurcations before oscillations fully emerge: doi.org/10.1063/5.03...

link.springer.comRosmarinic acid mitigates age-related loss of EEG complexity in temporal cortex: a recurrence quantification analysis - Cognitive NeurodynamicsPhysiological aging is associated with progressive changes in brain function, including neural oscillations. Recurrence Quantification Analysis (RQA) may provide a nuanced perspective on neural dynami...

15 June

Aging brains lose complexity – can rosmarinic acid help? In a D-galactose-induced aging model in rats, #recurrence_plot analysis shows how neural dynamics degrade with age. Rosmarinic acid (RA) partially reversed these trends, restoring healthy variability. link.springer.com/article/10.1...