Abstract: An optical fiber connector includes a connecting unit, an adapter unit, and an attenuation unit. The adapter unit includes an insertion seat connected removably to a main housing of the connecting unit, and two guide frame bodies located respectively at two opposite sides of the insertion seat in a transverse direction. The insertion seat has two insertion holes spaced apart in the transverse direction and extending in a front-rear direction. Each guide frame body extends in the front-rear direction away from the connecting unit. The attenuation unit includes two attenuation components, two rear ferrules, and two front ferrules. The attenuation components are arranged in the transverse direction and disposed within the main housing. The rear ferrules respectively extend rearwardly from rear ends of the attenuation components into the insertion holes. The front ferrules respectively extend forwardly from front ends of the attenuation components through and outwardly of the main housing.

Abstract: Systems and methods of beamforming and improving mmWave communications for drones are described. Multiple RF chains are used to adapt the main beam to track changes without the use of pilot signals. To reduce interference, interfering signal power is eliminated by optimizing a non-Gaussian measure to extract the interferers. The AoA of signals from a target drone on neighbouring drones and location of the neighbouring drones and base stations are used to independently corroborate the location reported by the target drone. The base station provides additional synchronization signals below 6 GHz and restricts the search/measurement space in the vertical direction. The inherent sparse structure above 6 GHz is exploited by applying different beamformers on a sounding signal and estimating the AoA and impulse response. Variations of fully digital and hybrid beamforming architectures for multi-cell DL sync and CRS measurement are described.

Abstract: An unmanned aerial vehicle can be configured to adjust a beam direction, provide path information, act as a base station, act as a cluster head, include an improved directional antenna or array of directional antennas, communicate in a collaboration using belief propagation, receive communications from a serving station aiding in navigation or improved signal performance, or the like.

Abstract: A hydraulic ship lift, including: a mechanical synchronizing system; a stabilizing and equalizing hydraulic driving system; and a self-feedback stabilizing system. The stabilizing and equalizing hydraulic driving system includes first resistance equalizing members arranged at corners of branch water pipes or/and second resistance equalizing members arranged at bifurcated pipes, circular forced ventilating mechanisms arranged at front of water delivery valves of a water delivery main pipe, and pressure-stabilizing and vibration-reducing boxes arranged behind the water delivery valves. The self-feedback stabilizing system includes a plurality of guide wheels; each guide wheel of the self-feedback stabilizing system is fixed on a ship reception chamber through a supporting mechanism.

Abstract: A hydraulic ship lift, including: a mechanical synchronizing system; a stabilizing and equalizing hydraulic driving system; and a self-feedback stabilizing system. The stabilizing and equalizing hydraulic driving system includes first resistance equalizing members arranged at corners of branch water pipes or/and second resistance equalizing members arranged at bifurcated pipes, circular forced ventilating mechanisms arranged at front of water delivery valves of a water delivery main pipe, and pressure-stabilizing and vibration-reducing boxes arranged behind the water delivery valves. The self-feedback stabilizing system includes a plurality of guide wheels; each guide wheel of the self-feedback stabilizing system is fixed on a ship reception chamber through a supporting mechanism.

Abstract: A hinge assembly for use in a flat display monitor includes a support member, a rotational base and a pivot mechanism for rotatably connecting the rotational base to the support member. The support member includes two first sidewalls, a first resisting surface and a second resisting surface. Each first sidewall defines a pivoting hole. The pivot mechanism includes a pivotal shaft, a limiting washer and a fixing element. The pivotal shaft includes a shaft portion running through the pivoting bole. The pivotal shaft is non-rotatable relative to the support member. The limiting washer includes a first restricting surface and a second restricting surface. The limiting washer is non-rotatable relative to the rotational base with the first restricting surface and the second restricting surface configured for resisting the first resisting surface and the second resisting surface respectively.

Abstract: An exemplary hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational base (20) and a pivot mechanism (30) for rotatably connecting the rotational base to the support member. The rotational base includes a fixing board (22) and a side board (24) disposed at an end of the fixing board, the side board defining an engaging hole (242) and forming an inwardly bent portion (240) at a distal end edge thereof. The support member includes an extending seat (16) defining a round pivoting hole (1601), and a retaining portion (161) extending from an exterior side of the extending seat. The retaining portion of the side board is configured for blocking the inwardly bent portion of the side board so that a range of rotation of the rotational base relative to the support member is between a first utmost position and a second utmost position.

Abstract: An exemplary hinge assembly for use in a flat display monitor includes a support member, a rotational base and a pivot mechanism for rotatably connecting the rotational base to the support member. The support member includes two first sidewalls, a first resisting surface and a second resisting surface. Each first sidewall defines a pivoting hole. The pivot mechanism includes a pivotal shaft, a limiting washer and a fixing element. The pivotal shaft includes a shaft portion running through the pivoting hole. The pivotal shaft is non-rotatable relative to the support member. The limiting washer includes a first restricting surface and a second restricting surface.

Abstract: An exemplary hinge assembly (300) for use in a flat display monitor (400) includes a support member (10), a rotatable base (20) and a pivot mechanism (30) for rotatably attaching the rotatable base and the support member together. The rotatable base includes a fixed board (22) and a side board (24) disposed at an end of the fixed board, and the side board forms a stopper (244). The pivot mechanism is rotatably connected to the rotatable base and non-rotatably connected to the support member. The pivot mechanism includes a pivotal shaft. The pivotal shaft defines a limited guide groove (3013) configured for blocking the stopper of the side board so that a range of rotation of the rotatable base relative to the support member is between a first utmost position and a second utmost position.

Abstract: An exemplary hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational base (20) and a pivot mechanism (30) for rotatably connecting the rotational base to the support member. The rotational base includes a fixing board (22) and a side board (24) disposed at an end of the fixing board, the side board defining an engaging hole (242) and forming an inwardly bent portion (240) at a distal end edge thereof. The support member includes an extending seat (16) defining a round pivoting hole (1601), and a retaining portion (161) extending from an exterior side of the extending seat. The retaining portion of the side board is configured for blocking the inwardly bent portion of the side board so that a range of rotation of the rotational base relative to the support member is between a first utmost position and a second utmost position.

Abstract: A hinge assembly (300) for use in a flat display monitor includes a support member (10), a rotational bracket (20) and a pivot mechanism (30) for rotatably connecting the rotational bracket to the support member. The support member includes an extending seat (16) defining a restricting groove (162) thereof. The pivot mechanism includes a pivotal shaft (301), a torsion spring (302), and a stop (303). The torsion spring is disposed around the pivotal shaft for providing torsion force. The pivotal shaft is fixedly connected to the rotational bracket and rotatably connected to the rotational bracket. The stop is fixed at end of the pivotal shaft and is rotatable in the restricting groove corresponding to rotation of the rotational bracket relative to the support member, with the stop being rotatable between a first utmost position and a second utmost position.