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This paper proposes a fast approach for traffic sign detection from video. First, we modify the image-based detector HHVCas to improve its accuracy and speed, then apply it to video-based detection with further acceleration by tracking. For the image-based detector, by optimizing the parameters in the cascade using an unsupervised approach, we achieve performance comparable to the state-of-the-art...
A detailed study of the scale transition in the asymptotic multiscale analysis of heterogeneous solids is presented. Through a one-dimensional periodic model problem with analytical solution, the micro scale analysis of unit cell and coarse-graining analysis for homogenized material constants, especially the scale transition, are discussed in details. The relationship between the asymptotic expansion...
An efficient meshfree analysis platform is presented for computer modeling of brittle failure in concrete structures. The stabilized conforming nodal integration is employed for the domain integration to stabilize the numerical solution and accelerate the computation. Both efficiency and stability are preserved in the same breath. A coupled elasto-plasticity and damage model is used to describe the...
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