Papers by Keyword: Hair

Abstract: Nowadays,artificial recognition is widely used in the mushroom inspection system, however, it depends on subjective judgment of inspectors.Therefore,the testing personnel's experience, technology and other factors will affect the objectivity and accuracy of test results.Commodity inspection system need a high-speed, objective and accurate method for the on-line hair detection in the mushroom.On the basis of summary of domestic and foreign research, this paper studies the target identification and feature extraction techniques based on computer vision, conducts a feasibility study for the real-time hair detection system.

Abstract: In order to understand the influence of stretching on the nanotribological properties of human hair, the European hair with stretching ratios at 20, 40, 60 and 80% were studied using atomic force microscopy (AFM). The results show that appropriate stretching ratios (40-60%) make the European hair surface smoother and the friction measurements also verify the result. When the stretching ratio is 80%, the European hair has the highest coefficient of friction. The reason is that cuticle damages lead to the local ratchet and collision between AFM tip and the sample obviously increased. With the increase of stretching ratios, the adhesive force of European hair is nonlinear change, which is attributed to the influence of contact area, water molecules absorbed and the amount of polar molecules.

Abstract: Cystine, frequently positive charged, formulated as a kind of hydrolysate surrounds the surface of hair. It baffles the particles with the same charge from being adsorbed by hair. On the contrary, it boosts those with the different charge. As a result, negatively charged ion, in the same condition, can be adsorbed more than those positively charged and much quicker to achieve the adsorption equilibrium. In the single solution, adsorption capacity is also relevant to the size of the particles. Namely, for metal ions, the larger the particles, the less they can be adsorbed. This is caused by the steric effect. While for organic anions, the larger the matter, the larger they can be adsorbed, which may be caused by van der Waals force.

Abstract: By analysing the Mushroom image, the paper puts forward a kind of line-structure extraction algorithm combination of local gray value and continuity of line direction .After the operations in many aspects of basis image processing, such as gray-scale, denoising , segmentation, contour detection and morphological, this article has developed a set of hair detection system based on computer vision for the Mushroom. The experimental results show this system could well meet the actual needs, and has a broad market prospect.

Abstract: MEMS offers exciting possibilities for the fabrication of bioinspired mechanosensors. Over the last years we have been working on cricket inspired hair-sensor arrays for spatio-temporal flow-field observations (i.e flow-camera) and source localization. Whereas making flow-sensors as energy efficient as cricket hair-sensors appears to be a real challenge we have managed to fabricate capacitively interrogated sensors with sub millimeter per second flow sensing thresholds, to use them in lateral line experiments, address them individually while in arrays tracking transient flows, and use nonlinear effects to achieve parametric filtering and amplification. During these developments we have been working in close collaboration with insect biologists, generating a bidirectional flow of information and knowledge, beneficial to both parties. E.g. where the engineering has greatly benefitted from the insights derived from biology and biophysical models, the biologists have been able to take advantage of MEMS structures allowing for the sort of analysis that is hard to do on living material (e.g. the study of viscous coupling between closely spaced hair-sensors).

Abstract: Cold vapor atomic adsorption spectrometry method was used in measuring mercury content in human’s hair samples after comparing the mercury measurement methods. Aqua regia-hydrofluoric acid digestion was taken to pretreat hair samples, and then mercury volume can be attained by Hydra AA Automatic mercury analyzer. Mercury concentration in about 40 percent of the tested samples exceeded the U.S. EPA recommended level 1μg/g. The results were analyzed from different respects including living environments, age distribution and dietary habits, and so on. The experimental data can supply a possible proof of mercury pollution in the studied district, and build foundation for the following full-scale mercury pollution investigation.