Abstract: A belt conveyor has a plurality of impact bars installed beneath a conveyor belt in transverse directions along a longitudinal direction of the belt in order to prevent the conveyor belt from sagging, and thus an operator can easily replace and check impact bars without stopping driving of the belt when replacing and checking the impact bars.

Abstract: A belt conveyor includes: a belt which is supported, rotated and moved by a plurality of rollers, and which moves ore and a product; skirt means which are installed on both sides over the belt along a longitudinal direction, and which prevent the ore and the product from being scattered; impact bar means which are installed beneath both sides of the belt, and which rub against the belt and also support the bottom surface of the belt; and impact bar fastening means which are installed beneath the impact bar means, and which support the lower ends of the impact bar means; wherein the impact bar means are installed in transverse directions along the longitudinal direction of the belt, and the impact bar means are detachably installed in left-right directions.

Abstract: The present invention relates to a method and apparatus for scheduling a downlink packet in a wireless communication system, which preferentially appoints a combination of a traffic flow and a physical resource block (PRB) having a low per-bit transmission power requirement during real-time traffic scheduling, and allocates the remaining PRBs to non-real-time traffic using spare transmission power. For this purpose, the downlink packet scheduling method of the present invention comprises: an operation of performing real-time traffic scheduling, which involves carrying out the process of preferentially appointing a combination of traffic flow and a PRB having the lowest per-bit transmission power requirement; a step of performing non-real-time traffic scheduling, which involves allocating remaining PRBs, which remain after the allocation to the real-time traffic, to non-real-time traffic using spare transmission power.

Abstract: The present invention relates to a method and apparatus for scheduling a downlink packet in a wireless communication system, which preferentially appoints a combination of a traffic flow and a physical resource block (PRB) having a low per-bit transmission power requirement during real-time traffic scheduling, and allocates the remaining PRBs to non-real-time traffic using spare transmission power. For this purpose, the downlink packet scheduling method of the present invention comprises: an operation of performing real-time traffic scheduling, which involves carrying out the process of preferentially appointing a combination of traffic flow and a PRB having the lowest per-bit transmission power requirement; a step of performing non-real-time traffic scheduling, which involves allocating remaining PRBs, which remain after the allocation to the real-time traffic, to non-real-time traffic using spare transmission power.