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.
Cognitive radio is able to effectively increase spectral utilization. However, cooperative spectrum sensing gives malicious users chances to interfere with its decision processes. If a mobile secondary user's energy detection results become unreliable, conventional trust-value based cooperative spectrum sensing algorithms, which are used to resist malicious attacks, cannot distinguish whether it's...
Cognitive radio is able to effectively solve problems like spectrum resource scarcity and low spectrum utilization rate in wireless communication system. The detection performance of multi-bit decision algorithm is much better than that of conventional 1-bit decision algorithm. Aiming at attacks from malicious users in multi-bit decision model when cognitive users are mobile, this paper proposes a...
As the data volume increasing and function expanding, train communication networks are developing from train control networks to multi-function communication networks. This paper compares three typical train network architectures which are applicable for train control and condition monitoring, including Train Monitoring Networks based on Industrial Field Bus, Wired Ethernet and WLAN. The advantages...
To describe the relationship between failure modes and maintenance cycle, an preventive maintenance cycle optimization model for the metro vehicle is introduced. The fault data is statistically analyzed in accordance with the Heinrich safety rule. And the fault distribution type of the system is determined using the AMSAA(Army Materiel Systems Analysis Activity) model. Then, the optimal mathematical...
The access control mechanism is the one key issue in realizing safety interoperation between distributed information systems. However, the existing multi-domains interoperation access control based on RBAC can not satisfy the safety needs of information system interoperability, in which the sort of users and information are diverse and update frequently. Therefore, the interoperation access control...
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.