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We propose an approach for traffic sign detection based on Convolutional Neural Networks (CNN). We first transform the original image into the gray scale image by using support vector machines, then use convolutional neural networks with fixed and learnable layers for detection and recognition. The fixed layer can reduce the amount of interest areas to detect, and crop the boundaries very close to...
A kind of biconically-tapered optical fiber (BTOF) modified by silica nanospheres is proposed to implement detection of refractive index (RI), especially low RI, with strong nonlinearity and enhanced sensitivity; this idea arose from an interesting experiment with a BTOF whose surface was very rough. The mechanisms of the nonlinear characters are investigated and explained by the coupling effects...
The anti-symmetric modes (A01 mode for low frequency, A03 mode for high frequency) and symmetric modes (S0 mode) produced by Lamb wave sensor are used to detect multi-parameters of a liquid, such as its density, sound velocity and viscosity. These modes are found to be very different to the parameters. For example, the A01 mode is very sensitive to the liquid's density but the A03 mode is sensitive...
This paper reports an effective optimization procedure for designing no-moving part microvalves where the diodicity of the optimized valves has better performance when compared with the typical Tesla valve. The detailed layout of microvalves is obtained by minimizing the fluidic resistance of fluidic channels for the forward flow under a user-specified design constraint about the fluidic work diodicity...
The pulmonary toxicology of carbon nanotubes (CNTs) was highlighted recently when single-walled carbon nanotubes (SWCNTs) were reported to be highly toxic and fibrotic in mice and in rats when administered by intratracheal instillation. Therefore, it is necessary to evaluate the effects of SWCNTs on human health and the environment before utilizing them on a large scale. The purpose of this study...
Carbon nanotubes currently attract intense attention for various biomedical applications due to their large surface areas, high electrical conductivity, and excellent strength. However, these attractive properties of nanomaterials are also the main factors for their potential toxicity. The present study was undertaken to determine the toxicity exhibited by multi- walled carbon nanotubes (MWCNT) in...
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