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Multi-temporal remote sensing data can provide much more information that could be used to improve the accuracy of classification of vegetation types. However, it is always required to manually select a set of training samples by using conventional supervised classification methods, which is a time-consuming and costly task. In this paper, a new classification method based on spectral knowledge database...
Sensor's localization plays a very important role in wireless sensor networks, a new sensor localization approach with Ring Overlapping Based on Received Signal Strength Indicator (ROBRSSI) using three beacons is presented. Through the designing of error transforming and the collaboration between nodes, the effect of measurement error of RSSI on localization accuracy is restrained efficaciously, the...
Differential GPS satellite positioning can eliminate pseudo range and pseudo range-calendar, can ionosphere delay and troposphere delay of the elimination of pseudo range, and the US government can reduce the impact of SA policies on satellite, positioning accuracy greatly enhanced. Therefore, the differential GPS positioning technology has been a rapid development and wide application in recent years...
Support vector machine (SVM) has been widely applied in the classification of remotely sensed image. How to reduce support vector number in SVM classifier so as to reduce classification time still an important open problem, especially in the case of mass data. To obtain fast classifier with high accuracy, an active learning schema is proposed in the SVM based image classification. Experimental results...
This paper expounds three kinds of grey neural network combined model for short-term prediction of urban traffic speed, and confirms their validity and feasibility by conducting experiment in Beijing road of Jingzhou. Three kinds of networks are parallel grey neural network, series grey neural network, and inlaid grey neural network. The experiment proves that the three kinds of modes are feasible...
When the single-phase to ground fault occurs, the initial current traveling wave of fault line and normal lines will change steeply, if the capacitor of bus isn't considered. When the capacitor of bus switches, the initial current traveling wave of normal line will change slightly, but that has no effect on the fault line which still keeps abruptly change. Based on that, this paper proposes a new...
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