Abstract: An evaluation method of craniofacial asymmetry index based on artificial intelligence is disclosed and includes: a craniofacial image shooting step: obtaining a craniofacial model file of a patient; an artificial intelligence head shape identification and feature point marking step: importing the craniofacial model file into an artificial intelligence algorithm, performing identification and feature point marking on a craniofacial image in the craniofacial model file to generate at least one feature point; a craniofacial space coordinate axis establishment step: including a coordinate axis y-z plane establishment step, a coordinate axis origin establishment step and a z-axis orientation definition step; and an artificial intelligence skew degree estimation step: inputting the craniofacial model file and corresponding coordinate axes into an artificial intelligence skew degree evaluation algorithm simultaneously, and presenting a craniofacial skew degree in a data visualization manner.

Abstract: A method of removing a step height on a gate structure includes providing a substrate. A gate structure is disposed on the substrate. A dielectric layer covers the gate structure and the substrate. Then, a composite material layer is formed to cover the dielectric layer. Later, part of the composite material layer is removed to form a step height disposed directly on the gate structure. Subsequently, a wet etching is performed to remove the step height. After the step height is removed, the dielectric layer is etched to form a first contact hole to expose the gate structure.

Abstract: A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes two side rails and a plurality of steps, which are connected between the two side rails. The stopper has a first end and, a second end. When the ladder is moved to the second position, one of the plurality of steps, which is arranged at the lowest position among the steps, abuts against the second end of the stopper, which causes the stopper to contact one of the wheels. When an operator steps on the ladder of the picking ladder cart, the lowest step drives the stopper to abut against one of the wheels.

Abstract: A picking ladder cart with a synchronized brake is provided, which includes a frame, a plurality of wheels, a ladder, and a stopper. The wheels are installed at a bottom of the frame. The ladder is pivotally connected to a side of the frame, wherein the ladder is pivotally movable between a first position and a second position. The ladder includes two side rails and a plurality of steps which are connected between the two side rails. The stopper has a first end and a second end, wherein the first end is connected to the bottom of the frame, and the second end is close to the ladder. When the ladder is moved to the second position, one of the plurality of steps which is arranged at the lowest position among the steps abuts against the second end of the stopper, which makes the stopper contact one of the wheels. Whereby, when an operator steps on the ladder of the picking ladder cart, the lowest step drives the stopper to abut against and stop the wheels, which increases the working efficiency.