Pedagogically, CAPT systems can be improved by giving effective feedback based on the severity of pronunciation errors. We obtained perceptual gradation of L2 English mispronunciations through crowdsourcing, and conducted quality control utilizing the WorkerRank algorithm to refine the collected results and reach a reliable consensus on the ratings of word mispronunciations. This paper presents...

Particle crushing dominates the deformation behaviour of granular materials under significantly high compressive and shear stress. A proposed constitutive model has been verified to predict crushing behaviour of granular materials with different crushability and adopted one kind of reference crushing stress. It is noted that no positive dilatancy of granular material in triaxial test occurs onc...

For better clarifying the influence of processing factors on forming quality direct powder rolling (DPR) process, finite element simulation based modified Drucker–Prager/Cap (DPC) model was established and key physical parameters were confirmed by experimental measurements. Subsequently, effect main in DPR viz., gradation, speed gap, density morphology a green sheet discussed using an orthogona...

This paper proposes the refined first order shear deformation theory to investigate the free vibration behavior of bidirectional functionally graded porous plates. This theory satisfies the transverse shear stress free conditions at the top and bottom of the plate, thus avoids the need of a shear correction factor. The rule of mixtures is employed to compute the effective material properties an...

Mining tailings as a raw material for preparing autoclaved bricks have attracted much attention. The tailings subjected to milling always have the characteristic of fine granularity. However, the proportion of the fine aggregates in autoclaved bricks was very low using the current gradation formula, which impeded the utilization of the tailings. In this work, a novel model of aggregate gradatio...

Predicting the effective elastic properties of carbon nanotube-reinforced nanocomposites is of great interest to many structural designers and engineers for improving material and configuration design in recent years. In this paper, a finite element model of a CNT composite has been developed using the Representative volume element (RVE) to evaluate the effective material properties of nanocomp...

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