Papers by Keyword: Edges

Abstract: The use of hand as direct input device evolved with the development of Natural User Interfaces (NUI). Touch screens are well integrated in our daily life and the new challenge is to implement interfaces which involve no direct contact. This paper presents such a solution implemented within the framework of sparse techniques. The feature vectors representing key distances and angles are extracted and used to detect fingers. The experimental results have demonstrated that this technique is able to obtain an error rate about 5% in finger detection.

Abstract: Texture and edge information are equally important to identification of most of natural images. To the problem of the existing integer order differential operators can’t extract texture information form the images, this study developed a fractional differential algorithm, which can extract texture and marginal information simultaneously, based on settlement of the drift problem of fractional differential operator. Experimental results showed that our algorithm can not only extract texture information but also extract more edge information than the traditional algorithms. And to the image with Gauss noise, our algorithm also have noise immunity.

Abstract: This paper presents measurements and cutting tests related to coating features on sharp cutting edges and rounded objects. One typical feature of plasma based deposition processes is the formation of a sheath region around the object to be coated. The formation of the sheath has some implications on the coating of three dimensional objects, since rounded surfaces and edges are subjected to different ion flux density as compared to a flat surface. Solid carbide drills of different diameters were coated with a TiAlCrSiN coating by cathodic arc evaporation. It is noted the deposition rate increases with decreasing drill diameter, and the fraction of elements with high expected mean ionization charge state is higher for a small as compared to a large diameter drill. The observations are explained by Coulomb attraction of ions from the plasma in combination with the sheath to tool radius ratio in combination with resputtering and scattering in the gas/plasma phase. Solid carbide end mills were coated with TiAlN at three different substrate biases; -10, - 40, and - 80 V. It is observed that the coating stresses increase drastically with increasing bias, and the corners of the tools have different stress levels than the flatter areas. In addition, the fraction of Ti in the coating around the corners is increased significantly when the bias increases. The end mills were tested in a machining test, and the best performer was the variant deposited at - 40 V.

Abstract: The examination of deburring and surface finishing (DSF) quality was held at the enterprises of Russia. Here are the results of the examination. It was held on the base of general conclusion from the Scientific Research Institute “V and T” investigation results. The practical use of DSF at the engineering plants was also taken into account.