Matrix measure-based exponential stability and synchronization of Markovian jumping QVNNs with time-varying delays and delayed impulses by Miao Zhang, Bole Li, Weiqiang Gong, Shuo Ma, Qiang Li

“…This article explored the topics of global exponential stability and synchronization issues of a type of Markovian jumping quaternion-valued neural networks (QVNNs) that incorporate delayed impulses and time-varying delays. By utilizing the matrix measure strategy and delayed differential inequality techniques with an impulsive factor, several effective and practical criteria can be established to confirm that the impulsive QVNNs in question can achieve exponential synchronization with the given response system. …”
Get full text

Synergistic effect of artificial intelligence and new real-time disassembly sensors: Overcoming limitations and expanding application scope by Bozhou Li, Dajiang Ju, Xingwang Li, Yan Liu, Hongru He, Hao Wang

Subjects: “…new real-time disassembly sensor…”
Get full text

Linear stability of a time-dependent, spherically symmetric background in beyond Horndeski theory and the speed of gravity waves by S. Mironov, M. Sharov, V. Volkova

“…In particular, we demonstrate that the class of beyond Horndeski theories, which satisfy the equality of gravity waves’ speed to the speed of light over a cosmological background, feature gravity waves propagating at luminal speeds above a time-dependent inhomogeneous background as well.…”
Get full text

Positive Solutions for Third-Order Nonlinear p-Laplacian m-Point Boundary Value Problems on Time Scales by Fuyi Xu

“…We study the following third-order p-Laplacian m-point boundary value problems on time scales: (ϕp(uΔ∇))∇+a(t)f(t,u(t))=0, t∈[0,T]T, βu(0)−γuΔ(0)=0, u(T)=∑i=1m−2aiu(ξi), ϕp(uΔ∇(0))=∑i=1m−2biϕp(uΔ∇(ξi)), where ϕp(s) is p-Laplacian operator, that is, ϕp(s)=|s|p−2s, p>1,  ϕp−1=ϕq, 1/p+1/q=1,  0<ξ1<⋯<ξm−2<ρ(T). …”
Get full text

Research on time–frequency characteristics of electromagnetic signals from coal and rock blasting based on DBO-VMD filtering by Litao WANG, Liming QIU, Menghan WEI, Dazhao SONG, Rentao GOU, Lin LIU, Shiqiang ZHONG, Tianyi XIE

“…The DBO-VMD achieves a signal-to-noise ratio about two times that of the EMD. Finally, we conducted a statistical analysis of the entropy, energy, bispectrum, and time–frequency domain characteristics of pure electromagnetic signals associated with coal–rock ruptures. …”
Get full text

Recovering Quantum Coherence of a Cavity Qubit Coupled to a Noisy Ancilla through Real-Time Feedback by Uri Goldblatt, Nitzan Kahn, Sergey Hazanov, Ofir Milul, Barkay Guttel, Lalit M. Joshi, Daniel Chausovsky, Fabien Lafont, Serge Rosenblum

“…By tracking the noisy ancilla trajectory and using real-time feedback, we successfully recover the lost coherence of the cavity qubit, achieving a fivefold increase in its pure dephasing time. …”
Get full text

Author Correction: Secondhand smoking increased the possibility of hypertension with a significant time and frequency dose-response relationship by Suixia Cao, Jingchun Liu, Yating Huo, Huimeng Liu, Yutong Wang, Binyan Zhang, Kun Xu, Peiying Yang, Lingxia Zeng, Shaonong Dang, Hong Yan, Baibing Mi

Get full text

On the stability, chaos and bifurcation analysis of a discrete-time chemostat model using the piecewise constant argument method by Ibraheem M. Alsulami

“…In this paper, the dynamics of a discrete-time chemostat model were investigated. The discretization was obtained using the piecewise constant argument method. …”
Get full text

Donor Heart Utilization following Cardiopulmonary Arrest and Resuscitation: Influence of Donor Characteristics and Wait Times in Transplant Regions by Mohammed Quader, Luke Wolfe, Gundars Katlaps, Vigneshwar Kasirajan

“…Heart procurement varied by region but not by transplant volumes or wait times.…”
Get full text

The Development Strategy of Dual-Channel Supply Chain of Smart Elderly Care Service from the Perspective of Time Perception by Tong Zhao, Qiaoming Hou

“…This research takes the smart elderly care service supply chain as the object, combines the social emotional choice theory for the first time, and uses the time perception to refine the elderly care demand into future-orientation demand and present-orientation demand. …”
Get full text

Enhanced Piezoresistive Cryogel: MWCNT Nanocomposite-Based Wearable Sensors for Real-Time Human Gait and Exercise Monitoring by Niranjan Deggenahalli Basavaraju, Vaidehi Basavakumar Roopa, Mathew Peter, Jeevan Medikonda, Saumya Bansal, Pramod Kesavan Namboothiri

Get full text

Navigating the current landscape of ocean observations: an overview from platform infrastructures to networks related to ocean time series by Anabel von Jackowski

Subjects: Get full text

A Numerical Method for Time-Fractional Reaction-Diffusion and Integro Reaction-Diffusion Equation Based on Quasi-Wavelet by Sachin Kumar, Jinde Cao, Xiaodi Li

“…The fractional term in the time direction is approximated by using the Crank–Nicolson scheme. …”
Get full text

Permanence and Almost Periodic Solution for an Enterprise Cluster Model Based on Ecology Theory with Feedback Controls on Time Scales by Yuanhong Zhi, Zunling Ding, Yongkun Li

“…Applying the comparison theorem of dynamic equations on time scales and constructing a suitable Lyapunov functional, sufficient conditions which guarantee the permanence and the existence of uniformly asymptotically stable almost periodic solution of the system are obtained.…”
Get full text

Estimation of the Defect Width on the Outer Race of a Rolling Element Bearing under Time-Varying Speed Conditions by Guang-Quan Hou, Chang-Myung Lee

“…However, estimation of the defect width under time-varying speed conditions is still a challenge. …”
Get full text

Time-Dependent Magnetohydrodynamic (MHD) Flow of an Exothermic Arrhenius Fluid in a Vertical Channel with Convective Boundary Condition by M. M. Hamza, S. Abdulsalam, S. K. Ahmad

“…The current study examined the effects of magnetohydrodynamics (MHD) on time-dependent mixed convection flow of an exothermic fluid in a vertical channel. …”
Get full text

Application of a data-driven XGBoost model for the prediction of COVID-19 in the USA: a time-series study by Wei Wu, Zheng-gang Fang, Shu-qin Yang, Cai-xia Lv, Shu-yi An

“…A comparison between the autoregressive integrated moving average (ARIMA) model and the eXtreme Gradient Boosting (XGBoost) model was conducted to determine which was more accurate for anticipating the occurrence of COVID-19 in the USA.Design Time-series study.Setting The USA was the setting for this study.Main outcome measures Three accuracy metrics, mean absolute error (MAE), root mean square error (RMSE) and mean absolute percentage error (MAPE), were applied to evaluate the performance of the two models.Results In our study, for the training set and the validation set, the MAE, RMSE and MAPE of the XGBoost model were less than those of the ARIMA model.Conclusions The XGBoost model can help improve prediction of COVID-19 cases in the USA over the ARIMA model.…”
Get full text

Cluster Synchronization of Stochastic Complex Networks with Markovian Switching and Time-Varying Delay via Impulsive Pinning Control by Xuan Zhou, Kui Luo

“…These networks are subject to stochastic noise perturbations and Markovian switching, as well as internal and outer time-varying delays. Using the Lyapunov-Krasovskii functional, Itö’s formula, and some linear matrix inequalities (LMI), several novel sufficient conditions are obtained to guarantee the desired cluster synchronization. …”
Get full text

Convergence Study of Variational Space-Time Coupled Least-Squares Frameworks in Simulation of Wave Propagation in Viscoelastic Medium by M. A. Saffarian, A. R. Ahmadi, M. H. Bagheripour

“…There are many novel applications of space-time decoupled least squares and Galerkin formulations that simulate wave propagation through different types of media. …”
Get full text

Undersampled Blade Tip-Timing Vibration Reconstruction under Rotating Speed Fluctuation: Uniform and Nonuniform Sensor Configurations by Zhongsheng Chen, Jing He, Chi Zhan

“…Blade tip-timing (BTT) is a promising method of online monitoring rotating blade vibrations. …”
Get full text