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.
Accurate localization and navigation are indispensable for mobile agents to walk in large-scale indoor public space, such as intelligent building and disaster rescue. In this paper, an intelligent localization and navigation system called ISILON is designed and developed. The system consists of a mobile terminal and multiple sensor nodes (also called landmarks) installed in the environment. The mechanism...
In this paper, multiple ground vehicles passing through a region that are observed by audio sensor arrays are efficiently classified using a Hierarchical Hidden Markov Model (HHMM). The states in the HHMM contain another HMM which represents a time sequence of the vehicle acoustic signals. The HMM represents the distribution of the output of the HHMM, where The HMM models the features of the continuous...
Multisensor data fusion has many military and civilian applications due to its statistical advantages. In this work, we propose a heuristic to enhance cooperative detection of moving targets within a region that is monitored by a wireless sensor network. This heuristic is based on fuzzy dynamic weighted majority voting for decision fusion. It fuses all the local decisions of the neighboring sensor...
Classification of ground vehicles based on acoustic signals can be employed effectively in battlefield surveillance, traffic control, and many other applications. The classification performance depends on the selection of signal features that determine the separation of different signal classes. In this paper, we investigate two feature extraction methods for acoustic signals from moving ground vehicles...
There has been a resurgence of interests in stimulated Brillouin scattering (SBS) in optical fibers recently. This is largely due to the need to overcome SBS for power scaling of single frequency fiber lasers. Complex acoustic waveguide designs have been proposed for SBS suppression in optical fibers. There is, therefore, a strong need for finding acoustic modes in complex acoustic waveguides. Furthermore,...
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.