36results about How to "Reduce follow-up" patented technology

An automatic printed circuit board (PCB) tool storing and taking device comprises a storage cabinet. A cabinet shell of the storage cabinet is provided with a newly-produced tool inlet, a to-be-polished tool inlet, an empty containing box outlet, a single-box tool storing and taking port and a human-computer interaction operation control panel. A conveying trolley used for conveying batched tools is arranged outside a cabinet body of the storage cabinet. A control system, an empty containing box conveying system, a containing box transferring mechanical arm, a tool box grabbing mechanical arm, a code scanning system, a tool box pushing system and a tool box storing and taking mechanical arm are arranged in the storage cabinet 1. The invention further provides an automatic PCB tool storing and taking method. According to the automatic PCB tool storing and taking device and method, the cost is low, the efficiency is high, and the precision is high.

The invention relates to the field of fruit picking tools, in particular to an apple picking tool capable of cutting fruit stems short. It includes a frame barrel, a shearing mechanism and a handle mechanism. The handle mechanism includes a cylinder whose cylinder body is fixed at the bottom of the frame barrel. The piston rod of the cylinder passes through the bottom of the frame barrel from bottom to top and the piston rod A joystick is fixed horizontally at the end, and a gripper is fixed at the end of the third transmission rod located above the rack barrel. The two grippers are opposite and each gripper has an arc that matches the middle of the apple. Surface structure; the shearing mechanism includes a guide column fixed on the body of the frame barrel, the outer cutting tool includes an outer blade with a concave surface facing the drive motor and is in a branched structure, and the inner cutting tool includes an inner blade in a branched structure. For the blade, the middle part of the inner blade rotates with the positioning shaft, and the position of the cutting edge at the branch of the outer blade is opposite to the position of the cutting edge at the branch of the inner blade. When the apple stem is cut to complete the picking, it is lower than the apple surface, which reduces the follow-up operations of the fruit grower, reduces the workload of the fruit grower, and avoids the occurrence of damage to the surface of other apples by the fruit stem of the apple during transportation.

The invention discloses a moving target positioning method under the condition of clock deviation and clock drift, which constructs a weighted least squares WLS problem including four unknown quantities of the source node's position and speed, clock deviation and clock drift, and then adopts positive semi-definite The relaxation method transforms the non-convex weighted least squares WLS problem into a convex positive semi-definite programming problem, and then uses the interior point method to solve the convex semi-positive definite programming problem to obtain the global optimal solution; In the case of simultaneous existence and unknown, from the perspective of weighted least squares estimation model estimation theory and convex optimization theory, while realizing the position and velocity estimation of the source node, the joint estimation of clock bias and clock drift is realized, and the positioning accuracy High, low computational complexity, suitable for complex deployment environments.

The present invention relates to a process for producing carboxylic acid anhydrides, in which a carboxylic acid ester, derived from an alcohol and a carboxylic acid, and carbon monoxide containing a small amount of hydrogen are used as raw materials and subjected to a carbonylation reaction in a liquid reaction medium in the presence of a Group VIII B catalyst to produce a carboxylic acid anhydride. The reaction medium comprises the Group VIII B catalyst, an organic halide, the carboxylic acid ester, an alkali metal salt, at least one organic promoter, the carboxylic acid anhydride and the carboxylic acid, wherein the organic promoter is selected from at least one of the following structural forms (I), (II) and (III). According to the process of the present invention, the reaction rate of the carbonylation reaction is increased by the use of the specified organic promoters.