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A new and much simpler rotation and curvature effects factor, which takes the form of Richardson number suggested by Hellsten originally for SST k–ω model, is presented for Spalart and Shur’s rotation and curvature correction in the context of Spalart–Allmaras (SA) turbulence model. The new factor excludes the Lagrangian derivative of the strain rate tensor that exists in the SARC model, resulting...
A large number of stimuli were often used for identify the guilty subjects in lie detection. In this paper, we proposed a novel lie detection approach to enhance the identification accuracy of the subjects. The independent component analysis (ICA) was used to separate the EEG signals, and a reconstruction algorithm was presented to recognize the P300 components automatically, and then reconstruct...
One of the mainstream research fields in learning from empirical data by support vector machines (SVM) is an implementation of the incremental learning schemes when the training dataset is huge. Moreover, the challenge of applying incremental SVMs on huge data sets comes from the fact that the amount of computer memory and learning time required along with the amount of dataset increased. In this...
In 2010, we proposed the improved unsupervised possibilistic clustering algorithm (IUPC) that can be run as an unsupervised clustering and overcome the weakness of the unsupervised possibilistic clustering algorithm (UPC) that it tends to generate coincident clusters. IUPC inherits the merits of UPC. In the meanwhile, IUPC solves the coincident clusters problem of UPC by limiting the feasible regions...
Our prior work suggested the use of power traces of unresponsive sensor nodes to diagnose the cause of anomalous node silence, but suffers from its limitations in scalability. To address these issues, we propose a new concept of power watermarking, a diagnostic service that actively produces unique power watermarks for each system state of interest so as to convey system information over power measurements...
A finite element model was built for the sheet metal multi-point stretch forming (MPSF), and the model was applied to the MPSF of a typical part. The numerical simulation of the MPSF for a saddle and cylindrical surface workpiece was performed. The effects of non-uniform deformation of elastic cushion and spring back after unloading on the precision of formed workpiece were investigated. The simulation...
A new method based on the well-studied boundary element method (BEM) is introduced to calculate ultra-high quality factors (Q) of whispering-gallery modes (WGMs) by studying the Poyting vector. In traditional numerical method, Q can be obtained through the formula Q = -Re(k)/2Im(k) by solving the wavenumber (k) of resonances, such that the precision of Q is determined by the wavenumber k. On the other...
In this paper, we proposed a novel Newton-type solver for one-class support vector machines in the primal space directly. Firstly, utilizing reproducing property of kernel and Huber regression function, original constrained quadratic programming is transformed into approximate unconstrained one, which is continuous and twice differentiable. Then, we give a Newton-type training algorithm to solve it...
Vehicle-borne laser scanning is used to collect urban street and building data for various modeling and mapping applications. The quality of laser point-cloud data is important for regenerating 3D urban street scene. Quality evaluation includes spatial structure analysis and positioning accuracy analysis. In spatial structure analysis, we evaluate the quality of point-cloud data high or low by analyzing...
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