Sand drift erosion is common on aeolian landforms, particularly in the Gobi desert where sand often quite strong. can lead to many types of hazards, including severe crop loss, structural damage buildings or infrastructure, and abrasion soil clay components that contribute production fine particulate matter. This article combines flow model with solid particles simulate process a variety enviro...

The nonlinear behaviour of the buck converter controlled by double-edged PWM waveform is studied in this paper. The stability of the system is analyzed using the state transition matrix over one switching cycle (the monodromy matrix) including the state transition matrices during each switching (saltation matrices). Three supervising control methods are applied to extend the normal period one o...

We formulate a continuum model for aeolian sand ripples consisting of two species of grains: a lower layer of relatively immobile clusters, with an upper layer of highly mobile grains moving on top. We predict analytically the ripple wavelength, initial ripple growth rate, and threshold saltation flux for ripple formation. Numerical simulations show the evolution of realistic ripple profiles fr...

Saltational changes in segment numbers have likely occurred in arthropod evolution, especially if mechanisms of segment formation involve a multiplicative phase, as recently suggested in the evo-devo literature. Here we provide for the first time evidence of major phenotypic saltation in the evolution of segment number in a lineage of centipedes, with a newly discovered species of scolopender h...

V-Sense is a vibrotactile interface that encourages children with severe or profound cognitive, sensory and physical impairments to move. The interface makes use of touch, in particular vibrations, as a supportive function to motivate users’ actions. Specifically, we propose a vibrotactile interface on the arm and around the shoulder using the saltation perceptual illusion to induce movement of...

We propose a minimal model for aeolian sand dunes. It combines an analytical description of the turbulent wind velocity field above the dune with a continuum saltation model that allows for saturation transients in the sand flux. The model provides a qualitative understanding of important features of real dunes, such as their longitudinal shape and aspect ratio, the formation of a slip face, th...

The processes of sediment particle movement were studied through numerical simulation using a coupled method with focus on discussing the characteristics sliding or rolling and saltation particles, respectively. Turbulent flow was simulated large eddy (LES). combined finite-discrete element (FDEM). interaction forces turbulent calculated immersed boundary (IBM). It indicated that collisions sal...

Abstract. Controlled experiments were performed to investigate the acoustic signal response of Swiss plate geophone (SPG) system impacted by bedload particles varying in size, impact angle, and transport mode. The impacts moving saltation, rolling, sliding determined analyzing experimental videos corresponding vibration signals. finite element method (FEM) was utilized construct a numerical mod...