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Automatic test paper generation system is to automatically generate papers by computer from test database with many constraint conditions according to requirements of teachers and teaching. It could greatly reduce teachers' work, and make the difficulty coefficient of test paper reasonable. The system plays an important role in reform of examination system. Traditional genetic algorithm uses binary...
In the majority of video conference applications, the camera position and its focus are fixed and the scene in the picture is stationary. When the subject moves, some occluded background reappears in the scene. Such uncovered background part usually has to be spatially encoded. In this paper, we propose a background memory update scheme for H.263 video codec which can use the previously transmitted...
The performance of a very low bit rate video codec largely depends on the efficient use of motion compensated prediction technique and on a good coding control strategy. In our previous approach [6], we proposed a multiple layer video codec using affine motion compensation. In this paper, we further extend our affine compensated multi-layer codec by incorporating a new block level and designing a...
Co-existing in the unlicensed ISM band, ZigBee transmissions can be significantly interfered by WiFi. Although several approaches recently are proposed to enable ZigBee transmission under WiFi interference, the ZigBee throughput still decreases to zero when WiFi throughput (generated by D-ITG) is over 8Mbps. In this paper, we propose a real-time (< 5ms) adaptive transmission (RAT) scheme to efficiently...
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