Sensing falsification is a key security threat in cooperative spectrum sensing in cognitive radionetworks. Intelligent malicious users (IMUs) adjust their malicious behaviors according to their objectives and the network’s defense schemes. Without long-term collection of information on users’ reputation, the existing schemes fail to thwart such malicious behaviors. In this paper, we construct a joint […]

In this letter, an improved phase correlation (PC) method based on 2-D plane fitting and the maximum kernel density estimator (MKDE) is proposed, which combines the idea of Stone’s method and robust estimator MKDE. The proposed PC method first utilizes a vector filter to minimize the noise errors of the phase angle matrix and then […]

Thermal management of power electronic devices is essential for reliable performance especially at high power levels. One of the most important activities in the thermal management and reliability improvement is acquiring the temperature information in critical points of the power module. However accurate temperature estimation either vertically or horizontally inside the power devices is still […]

AC filter capacitors are a limiting factor for reliability of power conversion systems in network power and alternative energy applications. Conventional capacitors with pressure interrupters or fuses often fail catastrophically with significant collateral damage. A next generation annular form factor dry-film capacitor has been developed to eliminate catastrophic failures using proprietary end connection and segmentation technology. By […]

A flywheel energy storage system (FESS) is a power storage device that stores electrical power by rotating energy. The FESS we develop has a large capacity to charge electrical power from a solar power system and other renewable generators and discharge the power to power networks. A superconducting magnetic bearing developed by Furukawa Electric and Railway […]