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By surveying 536 engineering graduates of six research-based universities in China, this research reveals perceptions and expectations of engineering curriculum reform. Variation was seen by university and engineering major. Overall, satisfaction with courses that promote skills and abilities is not high and correlation between courses and engineering practice is low. Results indicate that engineering...
Using inertial body-worn sensors, we propose a segmentation approach to detect when a user changes actions. We use Adaboost to combine three threshold-based detectors: force/gravity ratios, peaks of autocorrelation, and local minimums of velocity. Experimenting with the CMU Multi-Modal Activity Database, we find that the first two features are the most important, and our combination approach improves...
A new type of address code-Optical Orthogonal Code Pairs (OOCP) for Optical Code Division Multiple Access (OCDMA) system is presented in this paper according to the theory of sequence pair. Simultaneously, the concept of OOCP and correlation are defined, and OOCPs of capacity 1 are obtained by using exhaustive algorithm. Finally, OOCPs of larger capacity can be obtained by the recursive construction...
Optical orthogonal codes (OOCs) have been applied in OCDMA system because of their good correlation properties, especially the (n,w,1) optimal optical orthogonal codes. In this paper, based on block design and O-plus theory, the relationship between optimal optical orthogonal codes and O-plus Matrix is presented. One method, which could construct strict-optimal optical orthogonal codes, is proposed...
The present article revisits the role of viscoelasticity in wet skid resistance (WSR) of rubber composites by comparing the effects of carbon black (CB) and silica on WSR. WSR was determined with a British Pendulum Skid Tester on a wet ground glass surface. Under shear and tensile modes, tanδ of the composites was measured at 0 °C and 10 Hz over a wide range of strain (0.7%–10%) via a dynamic mechanical...
A new text categorization method based on singular value decomposition (SVD) and cascade correlation (CC) algorithm is proposed. Most traditional classification systems represent the contents of documents with vector space model (VSM) which represents documents with a set of index terms. However, this model needs a high dimensional space to represent the documents and it does not take into account...
Image encryption algorithm based on chaotic system has been increasingly, but the disadvantages of small key space, weak security in low dimensional chaotic cryptosystems, simple chaotic system, and inconvenient for hardware implementation are obvious. This paper presents a new image encryption algorithm based on chaos with PWL memristor in Chua's circuit. This encryption algorithm includes two main...
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