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Sentiment analysis, also known as opinion mining, seeks to figure out points of view from documents. Sentiment classification is a specific task of sentiment analysis that divides documents into positive and negative sentiment polarities according to the attitudes expressed. Feature extraction is a significant part of sentiment classification. Traditional feature extraction methods mine statistical...
In recent years, the demand of ubiquitous computing and location-based services (LBS) has risen. The most challenge in LBS is the location of mobile terminals. Existing location techniques have poor performance in urban environments due to severe multipath and NLOS propagation. Fingerprint localization based on wireless-LAN (WLAN) has been preferred for those types of environments. Although location...
Face annotation of photos, a key enabling technology for many exciting new applications, has been gaining broad interest. The task is different from the general face recognition problem because the dataset is not constrained - an unlabelled face may not have any corresponding match in the training set. Moreover, faces in real-life photos have a significantly wider variation range than those in the...
Precise geomagnetic reference map is needed for geomagnetic matching navigation and surface spline method is used in this paper to construct small-scale geomagnetic reference map. Of all the pretreated data, a part of them are used to construct the surface spline model, and the remain are used to validate the model, and then the data needed for the geomagnetic reference map are calculated by the surface...
It is difficult to get classic PID controller??s precise paramerers, and PID control method is based on the precise mathematical model, it??s adaptiveability is poor. PID control method is not adaptive to nonlinear and time-variant plants. It is impossible to insure the accuracy of the system. A method of compound control based on RBF neural network and PID is stated in this paper. This method is...
This study was undertaken to determine whether artificial neural network (ANN) processing of mid-latency auditory evoked potentials (MLAEPs) can identify different anesthetic states during propofol anesthesia, and to determine those parameters that are most useful in the identification process. Twenty-one patients undergoing elective abdominal surgery were studied. To maintain general anesthesia,...
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