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Article
Self-balance characteristics of the vibrating system with four split-driving vibrators
The isolation vibration design for a self-synchronous vibrating system is challenging because the realization of the system’s function depends on itself vibrating. We propose a method to solve the problem of v...
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Article
Synchronous stability and self-balancing behavior of a three-body vibrating system driven by four vibrators
Although many researchers have examined the synchronization characteristics of numerous dynamic models, equipment that utilizes synchronization phenomena with high yield, optimal isolation effect, and robust s...
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Article
Fixed Time Adaptive Fuzzy Control of Nonlinear Systems with Time-Varying State Constraints
In this paper, a fixed-time adaptive fuzzy control scheme is investigated to stabilize a class of uncertain nonlinear systems with full-state constraints. A novel secant barrier Lyapunov function (SBLF) is fir...
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Article
Open AccessBearing fault feature extraction based on MOMEDA and CS-Wood–Saxon stochastic resonance
Since rolling bearing is of great significance to ensure the safe and stable operation of rotating machinery, bearing fault feature extraction then demonstrates a hot topic of general interest in industry. In ...
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Article
Open AccessWinter snow cover influences growing-season vegetation productivity non-uniformly in the Northern Hemisphere
Ongoing changes in snow cover significantly affect vegetation productivity, but the actual effect of snow cover remains unclear due to a poor understanding of its lagged effect. Here, we used multisource datas...
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Article
Modeling of normal stiffness of mechanical joint based on anisotropic fractal theory
An idealized model of elliptical asperities was constructed by combining the geometric features of asperities on rough surfaces with the bivariate Weierstrass-Mandelbrot function for junction surfaces with ani...
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Article
Synchronization and stability characteristics of a double-pendulum coupling vibrating system driven by two vibrators
Despite many publications devoted to the synchronization of vibrators or pendulums, there exist limited works considering the nonlinear vibrations of pendulums and vibrators coupled together. This paper is dev...
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Article
Open AccessTriptolide attenuates irritable bowel syndrome via inhibiting ODC1
Irritable bowel syndrome (IBS) is a chronic disorder of the gut-brain axis with significant morbidity. Triptolide, an active compound extracted from Tripterygium wilfordii Hook F (TwHF), has been widely used a...
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Article
Open AccessSynchronization and Stability of a Nonlinear Vibrating Mechanical System Characterized by Asymmetrical Piecewise Linearity
In previous studies about the synchronization of vibrators, the restoring forces of springs are mainly treated as linear directly, whereas the nonlinear features are rarely considered in vibrating systems. To ...
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Article
Open AccessRolling bearing fault feature extraction method based on GWO-optimized adaptive stochastic resonance signal processing
The failure of rolling bearings affects the function and precision of rotating machinery significantly, which has drawn lots of attention in this field. Dealing with the failure of rolling bearings, fault feat...
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Article
Special Motion Characteristics of a Vibrating System with a Main Working Rigid Frame Driven by the Pendulum Bob
For the vibrating machine with linear motion, the traditional driving method is utilizing the self-synchronization of double vibrators, or using a single motor to drive a pair of forced synchronization vibrato...
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Article
Open AccessSynchronous quantitative analysis of chiral mesostructured inorganic crystals by 3D electron diffraction tomography
Chiral mesostructures exhibit distinctive twisting and helical hierarchical stacking ranging from atomic to micrometre scales with fascinating structural-chiral anisotropy properties. However, the detailed det...
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Article
Open AccessCharacterization of the health and irrigation risks and hydrochemical properties of groundwater: a case study of the Selian coal mine area, Ordos, Inner Mongolia
Groundwater (GW) is an important source of freshwater in arid and semiarid areas. Some important industrial activities, such as coal mining, also consume GW. There have been few studies evaluating GW quality i...
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Article
Theoretical, numerical, and experimental study on the synchronization in a vibrator–pendulum coupling system
For a vibrating system where the pendulum and vibrators are coupled together, the relevant dynamic model and the corresponding synchronization problem are rarely studied, due to its complex dynamic coupling re...
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Article
Erratum to: NIR-IIb excitable bright polymer dots with deep-red emission for in vivo through-skull three-photon fluorescence bioimaging
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Article
Efficient Methanol-to-Olefins Conversion Via Photothermal Effect Over TiN/SAPO-34 Catalyst
As one of the most promising routes for production of low-carbon olefins (e.g., ethene and propene etc.), methanol-to-olefins (MTO) reaction is influenced largely by the temperature. Noble metal (e.g., Au, Ag,...
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Article
Evaluating the different responses to climatic factors between snow water equivalent and snow cover area in the Central Tianshan Mountains
Alpine snow is an important part of the water cycle in arid/semiarid regions and has a great influence on runoff and ecosystems. In this study, both optical and passive microwave remote sensing data were used ...
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Article
Correction to: High‑speed abrasive flow composite polishing based on dielectrophoresis effect
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Article
Theoretical, Numerical and Experimental Studies on Times–Frequency Synchronization of the Three Exciters Based on the Asymptotic Method
This paper aims at investigating the times–frequency synchronization of the three exciters in a far super-resonant vibrating system. Based on the asymptotic method, the Bogoliubov standard formal equations of ...
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Article
High-speed abrasive flow composite polishing based on dielectrophoresis effect
The traditional abrasive flow composite polishing technology has the problems of long polishing time and low polishing efficiency. In order to solve this problem, a high-speed abrasive flow composite polishing...
