The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Conventional long baseline interferometer based Direction of Arrival (DOA) requires multi-group long baselines and short baselines to deblur. In this paper, only using the time difference of arrival (TDOA) data of long baseline interferometer can cancel the debluring shortage and achieve high-precision DOA estimation. Meanwhile iterative filtering algorithm is adopted to extract high-precision changing...
Feature selection is a very important step in text classification, which affects the accuracy and validity in text classification. Base on four classic feature selection algorithms of text mining, this paper has established a kind of integrated learning algorithm which applies with feature selection in text classification, in order to improve the accuracy of text classification. Test results show...
With the rapid development of database technique, categorizing datasets becomes very important for discovering information. Decision tree classification provides a rapid and effective method of categorizing datasets. Although many algorithmic methods exist for optimizing decision tree structure, these can be vulnerable to changes in the training dataset. In this paper, an evolutionary method is presented,...
Image segmentation with the traditional Fuzzy C-means (FCM) algorithm only uses each pixel's gray value, when the image is corrupted by noises, the accuracy of segmentation will be greatly reduced. So, this paper proposed an image segmentation method which based on rough sets theory and fuzzy c-mean clustering. The test result shows that the method has a good segmentation performance.
The identical physiological signal, which is measured by different sources, can not compare directly. In order to process the data further and analysis the impact of uncertainty, a method of electrophysiological data normalization is proposed. In this paper, Mahalanobis scaling method is applied to electrophysiological data normalization in order to reduce the differences between different instruments,...
As an important parameter in vehicle location and navigation system, heading measurement requires a higher precision. The paper aims at the research on fusion of heading information obtained through magnetic compass, angular rate gyro and GPS. Firstly, a integrated filter model has been designed to adapt the error characteristics of gyroscope, magnetic compass and GPS. Then, considering loss of GPS,...
To meet the need of high-precision navigation for HALE (high-altitude long-endurance) UAV (unmanned aerial vehicle), multi-sensor fault-tolerant autonomous navigation system was researched. For the shortcoming that the GPS signal is easily interfered by electromagnetic techniques, combining sundry integrated navigation patterns such as the INS/CNS integrated navigation, the INS/SAR (Synthetic Aperture...
With the increasing number of Web service applications, how to accurately find the services to meet the needs is one of the key issues of the study at this stage. For the problem of low accuracy in Web services discovery, this paper presents a Web service semantic matching method-MSURAP. This method not only makes use of the basic reasoning relationship between concepts and does refinement of this...
It applies artificial immune theory to the intrusion detection model and puts forward a new method different from traditional affinity match method. It provides the dynamic equation of the ripe cell and memory cell, and sets up a kind dynamic match algorithm. The experiment simulation result indicates that adopting this algorithm improves the efficiency and accuracy of measurement, makes it more effective...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.