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Study on the thermal process in repetitively operated electron beam collectors of relativistic backward wave oscillators is proposed. Using Monte Carlo method, the energy deposition of the beam was calculated. With energy deposition as the internal heat generation, numerical model of thermal process in collectors was estimated in finite element method. Temperature development was obtained and compared...
Effective streaming of video can be achieved by providing more bits to the most important region in the frame at the cost of reduced bits in the less important regions. This strategy can be beneficial for delivering high quality videos in mobile devices, especially when the availability of bandwidth is usually low and limited. While the state-of-the-art video codecs such as H.264 may have been optimised...
Detection of Region of Interest (ROI) in a video leads to more efficient utilization of bandwidth. This is because any ROIs in a given frame can be encoded in higher quality than the rest of that frame, with little or no degradation of quality from the perception of the viewers. Consequently, it is not necessary to uniformly encode the whole video in high quality. One approach to determine ROIs is...
We proposed an embedded face recognition authentication system with a novel structure, which consists of the RFID card used to store the face eigen information and the face recognition unit based on S3C6410. The hardware was designed and described, and the recognition algorithm was presented thoroughly. With the fabricated system, experiments were carried out for studying the authentication performances...
In this paper, we present a system of patient robot developed with the aim at improving abilities of nursing student's medical treatment, such as injection to vein. We propose to realize variable emotion of patient robot by using chaos orbit of non-linear time-differentiation equation. To evaluate the effectiveness of the robot through actual injection training, we measure heartbeat rate of nurse...
3D face recognition is one of the most popular researches at present. However, 3D face model stored in databases can be tampered or overwritten with attacker's own, which results in that legitimate user failed in authentication or lost their identity. In this paper, we provide a security enhancement scheme for biometric system and implement it in 3D face recognition. In our scheme, a digital watermark...
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