Pavement straw composite fibers (PSCF), a new material, were independently invented and developed by blending agriculture waste straw and modified bentonite, as showed in this paper. The chemical corrosion properties ...
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ISBN:
(纸本)9780878493043
Pavement straw composite fibers (PSCF), a new material, were independently invented and developed by blending agriculture waste straw and modified bentonite, as showed in this paper. The chemical corrosion properties of PSCF in different pH values were test in microscale, and digital imagine processingtechnology was adopted to analyzing quantitatively the physical and mechanical properties, including particle area, pores connectivity rate and compressive strength, before and after PSCF were corroded. Research results show that the particle area of acidified PSCF is smaller than that of alkalized PSCF, however, the fractal dimension of acidified PSCF is bigger than that of alkalized PSCF. The change of PSCF microstructure has significant effect on its macromechanics properties. The compressibility of acidified PSCF was obviously bigger than that of alkalized PSCF, so the strength of acidified PSCF decreased significantly with the acidifying time increasing. The main reason was gradually decreasing of the particle area, decreasing of the fractal dimension and the loose tendency of fibers particle distribution. The interaction between mineral composition of PSCF and hydrochemistry solution was the basic factors determining straw structural characteristics, and the physical and mechanical properties of PSCF were affected by its structural characteristics. The main process was that mineral compositions of PSCF were cemented by the corrosive action of hydrochemistry solution, or some compositions were dissolved and precipitated, the porosity and particle area of PSCF, the arrangement pattern of soil particles as well as other microstructures changed. And deformation properties of PSCF changed correspondingly with the change of PSCF structure shape. Moreover, the constitutive model of PSCF with effect of acid and alkali was presented according to test data of digital image. It provided reliable techniques to quantitatively evaluate the pavement performance of PSCF in micr
Vehicle headlamp is a very important component for safe driving. The calibration of vehicle headlamp must be done in accordance with standard (JJG967-2001), such as the distribution of shade and the luminosity distrib...
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ISBN:
(纸本)9780819473677
Vehicle headlamp is a very important component for safe driving. The calibration of vehicle headlamp must be done in accordance with standard (JJG967-2001), such as the distribution of shade and the luminosity distribution of far light and close light. Photoelectric measurements, for example, electronic scanning system, dot array of photoelectric cell system and CCD measurement system, were used to research the shade distribution and the luminosity distribution. In order to expedite the measuring process and acquire more accurate parameters, CCD measurement system is proposed to measure more characteristic parameters of headlamp at higher speed. image processing technology is utilized to get the characteristic parameters such as luminous intensity and optic axis deviation angle for headlamp. Some software algorithms of digital imageprocessing can be used to achieve an uncertainty of luminous intensity of less than or equal to 2%, and an uncertainty of deviation angle of optic axis of less than or equal to 1.6 minute. Experimental results showed that it has many advantages such as high precision, good repetition.
In order to prevent fatigue driving, through many studies of the driver's eyes, a Matlab-based fatigue driving detection system is designed and simulated based on image processing technology. The system samples se...
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In order to prevent fatigue driving, through many studies of the driver's eyes, a Matlab-based fatigue driving detection system is designed and simulated based on image processing technology. The system samples sequences of images with an camera and its built-in light source, and then locates the eye-point in the image and tracks it, calculates the area of the eyes, finally makes judgment on whether the driver is driving with fatigue or not and warns him according to the judgment. The simulation test result shows that the recognition ratio of shallow fatigued drivers is 81.5％, and the recognition ratio of moderate fatigued drivers and deep fatigued drivers is 100％.
Area and fat content of loin-eye muscle, marbling and color of pork are important parameters of pork quality. The digital camera was adopted in this study to obtain the loin-eye muscle image of 30 hug
Area and fat content of loin-eye muscle, marbling and color of pork are important parameters of pork quality. The digital camera was adopted in this study to obtain the loin-eye muscle image of 30 hug
Recently development of new type rolling mills has made it possible to dynamically control the profile and the shape of hot rolled strips. In order to improve the performance of new type mills, profile and shape meter...
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Recently development of new type rolling mills has made it possible to dynamically control the profile and the shape of hot rolled strips. In order to improve the performance of new type mills, profile and shape meters are required. The profile meter with high accuracy has been put to practical use, on the other hand the shape meter has not been widely used because of strip fluttering and the poor atmospheric conditions for example steam, dust and high temperature. Sumitomo Metals succeeded in developing a new shape meter with high accuracy applying laser and image processing technology. This system eliminates the measurement errors caused by the strip fluttering. Furthermore, it can be used even in the hot, steamy and dusty stomosphere. This system has been put into operation in the finishing mill of Kashima Steel Work’s hot strip mill and it has contributed to the improvement in the quality of hot strip coil.
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