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Compressive sensing theory shows that sparse signals can be reconstructed from far less samples than those required by the classical Shannon-Nyquist Theorem. An optimized sensing matrix for a certain class of signals can further reduce the necessary number of samples. Additionally, in order to make the signals represented as sparse as possible, a dictionary can be optimized. In this paper, we introduce...
Urban vegetation, particularly trees, plays important roles in the urban ecosystems. In this study, we examined the potential of WorldView-2 imagery (acquired on September 14, 2012) for urban tree species classification in the capital city of Beijing, China. Four tree species including Chinese white poplar(Populus tomentosa Carrière),Chineses scholartree(Sophora Japonica), Gingko(Ginkgo biloba L.)and...
This paper deals with the optimal measurement matrix design problem for compressed sensing (CS) systems with a dictionary given. Such a problem is usually formulated as to minimize the distance between the Gram of the equivalent dictionary of the CS systems and a target Gram of nice properties. A new design criterion is proposed, which is defined in terms of three popularly used target Grams. An algorithm...
Most IP-geolocation mapping schemes [14], [16], [17], [18] take delay-measurement approach, based on the assumption of a strong correlation between networking delay and geographical distance between the targeted client and the landmarks. In this paper, however, we investigate a large region of moderately connected Internet and find the delay-distance correlation is weak. But we discover a more probable...
Instruction set simulator plays a very important role in new micro-architecture design domain and cross-platform software design and development. The simulation speed performance and the simulation accuracy are the two most important factors that are used to evaluate simulators. Interpretive instruction simulation technique and compiled instruction simulation technique are the most common used and...
The goal of this research is to develop novel cluster analysis techniques to identify similarity between ICU time-series data. The results generated by cluster analysis are further used for ICU mortality prediction. To preprocess multi-granular ICU time-series, we proposed a segmentation-based method to divide time-series into several segments. The minimal and maximal values within each segment were...
Although researches on network traffic identification have already got some achievements, but most of them are not suitable for online traffic classification by considered the dynamic feature of flows. In this paper, we propose a dynamic online traffic identification method by introducing density-based clustering algorithm for stream data called DStream, and using the feature select algorithm to reduce...
The generalization ability of neural network is an important aspect affecting its application. Meanwhile, the selection of training samples has a great impact on this ability. In order to improve the completeness of training samples, a method of samples self-learning of BP neural network based on clustering is put forward in this paper. By using the method of clustering, new samples can be collected...
Phases of aluminum electrolytes with additives of NaCl and KF were investigated. The definition and determination of the cryolite ratio of bath were discussed based on the results of phase composition. The deduced cryolite ratio equation was justified by fluorideion selective electrode analysis (FISEA). Experimental results show that FISEA has good performance with high accuracy and reproducibility...
Video text contains abundant high-level semantic information, which is important to video analysis, indexing and retrieval. In this paper, fuzzy support vector machine (FSVM) is applied to distinguish background and text in a video sequence. Firstly, the video frame is divided into 8×8 blocks, and we extract the gray, edge and texture feature information as the training samples. Then FSVM is used...
Recognition of Chinese personal name is a difficult and challenging task in unknown words recognition. In this paper, we proposed a method of Chinese name recognition based on Support Vector Machines (SVM) and transformation-based error-driven learning. Using the transformation-based learning approach to correct the identification results of SVM. Transformation rules effectively deal with the special...
In view of importance of teaching quality evaluation, the process and results are fully concentrated on considering entirety and dynamics. A method of teaching quality evaluation calculation is proposed on the basis of Bayes analysis and implemented by way of VB program. The no-strictness and no-accuracy results of conventional calculating methods are analyzed. Discusses how to calculate the standard...
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