Abstract: A lidar-based convergence deformation monitoring system for surrounding rock around a TBM shield region, including a data acquisition module. The data acquisition module includes: a lidar, a push-rod motor, an H-bridge circuit, a power supply module, an ARM chip, a guide rod, a linear bearing, a tempered glass cover and a protective case. The lidar and the push-rod motor are connected to a lidar connector to acquire raw data of the surrounding rock and store the raw data in the ARM chip. A middle portion of a top plate of the protective case allows the lidar to extend out of the protective case. The protective case is fastened to an inner wall of the TBM shield through two mounting brackets on both sides of the protective case, and the inner wall facilitates the lidar to extend out of the protective case to perform a measurement.

Abstract: A wireless communication system, wireless communication system and method, the device on the base station side in the wireless communication system including: an edge user equipment (UE) identification unit configured to identify the edge UE on the enhanced physical downlink control channel (EPDCCH) according to the information about the UE received from the UE; and an interference coordination unit configured to apply an interference coordination plan to the EPDCCH of the edge UE. Applying the interference coordination plan to the EPDCCH of the edge UE improves service quality of the edge UE; and setting a proper degree of enhanced control channel element aggregation for the edge UE reduces the number of blind tests of the UE, thus increasing the system response speed.

Abstract: A machine tool includes a rotary table on which a workpiece is mounted, a clamping mechanism for clamping the rotary table against rotation, and a sensor for detecting completion of a clamping operation of the clamping mechanism. A numerical controller for controlling the machine tool calculates the time required for actual operations of the clamping mechanism, taking into account beforehand the processing time for processing a feedback signal from a sensor and the time until the next operation of the machine tool. By controlling the clamping mechanism based on the calculated required time, the cycle time of clamping or unclamping operations is shortened.