Abstract: A tooth vibration simulation test system to solve the problem of failure to simulate a tooth vibration of the dual-machine parallel drive gear transmission device and being used in tooth vibration simulation testing, includes a first and a second driving units, a transmission shaft assembly, a servo motor controller, a gear transmission device, a loading shaft, a load dynamometer and a load dynamometer control device. The power output of the first driving unit and the second driving unit are both connected to inputs of the gear transmission device, a power output of the gear transmission device is connected to one end of the loading shaft, another end of the loading shaft is connected to a power input shaft of the load dynamometer through the transmission shaft assembly, a signal input terminal of the load dynamometer is connected to a signal output terminal of the load dynamometer controller.

Abstract: Method and apparatus for deriving a motion vector at a video decoder. A block-based motion vector may be produced at the video decoder by utilizing motion estimation among available pixels relative to blocks in one or more reference frames. The available pixels could be, for example, spatially neighboring blocks in the sequential scan coding order of a current frame, blocks in a previously decoded frame, or blocks in a downsampled frame in a lower pyramid when layered coding has been used.

Abstract: A multi-module fiber laser capable of monitoring abnormalities of optical modules in real time. In the multi-module fiber laser, the CAN bus is employed to directly obtain whether each of the slave control modules or the master control module is in normal working condition, so that the CAN bus is at the status level corresponding to whether all modules are in normal working state, namely, the CAN bus that is configured to transmit the light control signal issued by the master control module. The status level of the slave control module or the combiner module is also transmitted via the CAN bus, so that all the slave control modules can quickly put themselves in the corresponding working state according to the status level of the CAN bus.