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Recently, key-phrase extraction from patent document has received considerable attention. However, the current statistical approaches of Chinese key-phrase extraction did not realize the semantic comprehension, thereby resulting in inaccurate and partial extraction. In this study, a Chinese patent mining approach based on sememe statistics and key-phrase extraction has been proposed to extract key-phrases...
Taking the theses’ keywords in China from 1986 to 2014 as the research materials, use the basis concept of the Big Data Theory to further study the keywords which related to oil and gas industry. Analyze the keywords frequency of the theses in oil and gas industry and its co-occurrence frequency pair, and then use the theory of mapping knowledge domain to visualize the keywords co-occurrence network...
A method of using statistical analysis on site-sampled sphygmogram data sets and support vector machines classifier to diagnose coronary heart disease is proposed. The hemodynamic parameters derived from sphygmogram reflect the status of human cardiovascular system. Based on homodynamic parameters, the dimension reduction methods and a modified support vector machines classifier are applied to meliorate...
Considering inherent limitations of such locality-based dimensionality reduction methods as unsupervised discriminant projection (UDP), a novel manifold-base feature extraction method, called locally supervised discriminant analysis in kernel space, is proposed in the paper. It is a locally nonlinear and supervised dimensionality reduction method, which takes into account the locality, kernel mapping...
Image segmentation is an important task for higher level image processing. A simplified pulse coupled neural network (PCNN) was proposed in this study. The comparative experiments were implemented to segment images by Otsu method, improved PCNN and our simplified PCNN algorithm. The mean values of Hausdorff distance and Tanimoto coefficient of our simplified PCNN algorithm were 5.41plusmn0.03 and...
The study on further treatment of coal coking wastewater by ultrasound wave, Fenton's reagent and coagulation was carried out in this paper at the first time, Furthermore, this paper discussed the optimum cooperative reaction condition of their combined application and the influence trend of COD by the single factor. The results showed that the removal rates of COD had optimum values with the variation...
Data mining has as goal to extract knowledge from large databases. To extract this knowledge, a database may be considered as a large search space, and a mining algorithm as a search strategy. In general, a search space consists of an enormous number of elements, which make it is infeasible to search exhaustively. As a search strategy, genetic algorithms have been applied successfully in many fields...
A cylindrical ultrasonic motor using bending transducer was proposed in this paper. The stator components of proposed motor contain a cylinder and four bending transducers, and the four uniform bending transducers are set on the exterior surface of cylinder. The bending of transducers is excited by the longitudinal vibration of PZT ceramics. The four transducers are excited with two different groups...
The paper first gives a method for removing the thousands of noisy points by using neighborhood centroid constrained fairing algorithm. And then, uses the 3D point clouds to reconstruct the face surface. At last, we could extract the facial feature.
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