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.
The indoor scene accurate recognition can provide valuable environmental information for location based services and context-aware applications. In this paper, we proposed a lightweight indoor scene recognition algorithm. It adopts the quick barometric pressure change to detect indoor floor transition, which is then used to judge the user is in buildings. Because pressure observation is independent...
The presentation of Bluetooth Low Energy (BLE; e.g., Bluetooth 4.0) makes Bluetooth based indoor positioning have extremely broad application prospects. In this paper, we propose a received signal strength indication (RSSI) based Bluetooth positioning method. There are two phases in the procedure of our positioning: offline training and online locating. In the phase of offline training, we use piecewise...
Orthogonal Frequency Division Multiplexing (OFDM) is sensitive to carrier frequency offset (CFO) which will cause intercarrier interference (ICI). Frequency offset estimation and compensation scheme can estimate and compensate CFO. But due to the white Gaussian noise, the estimated CFO is inaccurate. In order to eliminate the residual CFO, the ICI self-cancellation scheme proposed by Y. Zhao[3] is...
Unmanned Mobile Platform (UMP) is an intelligent and automated transport vehicle which can implement kinds of tasks by equipped different appurtenances. A four-wheel car with front wheels steer and rear wheels drive is selected as the moving mechanism, paper researches and designs a control system to make the platform follow the path's guide-line with the master control chip MC9S12DG128. Platform...
Using sheets of Nb, Ti and Ta as starting material, NbTiTa superconducting filaments were prepared by extrusion and drawing. The microstructure evolution of the composite after extrusions and the diffusion among Nb, Ti and Ta in the composite were studied. It is found that a large number of crystal defects and the temperature increment appeared, which was caused by the large plastic deformation during...
In software testing, it is often desirable to find test inputs that exercise specific program features. To find these inputs by hand is extremely time-consuming, especially when the software is complex. Therefore, numerous attempts have been made to automate the process. Often, the desired inputs must satisfy complex constraints, and this makes a random approach seem unlikely to succeed. We advance...
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.