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

The invention relates to a method for preparing compound palbociclib (shown as the formula I). A compound D (shown as the formula II) serves as a raw material, and a compound E (shown as the formula III) is obtained through a rearrangement reaction of alkenyl ether; then the compound E is subjected to t-butyloxycarboryl protection group removal under the acidic condition, and target product palbociclib is obtained; an R group in a compound D is selected from any one of a C1-C6 alkyl group, a C1-C6 halogenate alkyl group, C1-C6 hydroxyalkyl and a C1-C6 naphthenic base. The process procedure and operation steps are easy and convenient, prepared palbociclib is high in purity, and good popularization prospects are achieved.

The invention provides a replacement system and a replacement method for a power battery box and solves the problems of replacement adaptability, using of a battery rack, charging environment of a battery and rapid replacement of the battery box of an electric vehicle. The replacement system comprises a manipulator, the battery rack, a shuttle vehicle and a stacking machine, wherein the manipulator is used for loading and unloading the battery from the vehicle; the battery rack is used for storing and charging the battery box; the shuttle vehicle is positioned below the battery rack and is used for temporarily storing the battery required by the manipulator; the stacking machine is used for taking the battery from the shuttle vehicle and placing the battery on the battery rack; the rear part of the stacking machine is provided with a curtain wall; the curtain wall and a closed battery rack front panel have a sealing effect on the system together, so that the optimal battery charging temperature in the battery rack is ensured, the service life of the battery is prolonged and the problem of charging environment of the battery is well solved. In the replacement method, the battery box does not need to be rotated, so that the replacement efficiency of the battery box is improved. The replacement system has reasonable arrangement of parts, small occupied area, high working efficiency, small equipment maintenance amount and stronger universality.

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 discloses a moving target positioning method under clock skew and clock drift conditions, and the method comprises the steps: constructing a WLS problem which comprises four unknown quantities: the position and speed of a source node, the clock skew and the clock drift; converting a non-convex weighted least square (WLS) problem into a convex positive semidefinite programming problem by adopting a positive semidefinite relaxation method, and solving the convex positive semidefinite programming problem by utilizing an interior point method to obtain a globally optimal solution. The method has the advantages that under the condition that the clock skew and the clock drift coexist and are unknown, from the perspective of the weighted least square estimation model estimation theory and the convex optimization theory, joint estimation of the clock skew and the clock drift is achieved while position and speed estimation of a source node is achieved, the positioning precision is high, and the calculation complexity is low. The method is suitable for complex deployment environments.

The invention discloses a self-propelled asphalt in-situ heating regeneration device which comprises a mounting plate; a storage box is fixedly mounted at the top of the mounting plate; a mixing device is fixedly mounted in the middle of the storage box, and pushing and pressing devices are arranged on the two sides of the storage box. The invention relates to the technical field of asphalt in-situ heating regeneration devices. According to the self-propelled asphalt in-situ heating regeneration device, by arranging a reciprocating adjustment driving piece, a discharging head can be driven totransversely reciprocate on the upper side of a filling pit for filling; by means of a transmission driving device, a mounting disc can be slowly driven to vertically move along the filling pit at thesame time, and therefore asphalt can be evenly added into the filling pit, subsequent operation is reduced, and the frequency of pavement repair work is increased; and in addition, the distance of reciprocating movement of the discharging head can be adjusted by adjusting the distance of a driving shaft, and therefore the device can adapt to filling of filling pits of different sizes and is convenient to use.

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.

The invention relates to the field of fruit picking tools, and particularly relates to an apple picker capable of cutting fruit stems short. The apple picker comprises a rack cylinder, a cutting mechanism and a puller mechanism, wherein the puller mechanism comprises an air cylinder with a cylinder body fixed at the bottom of the rack cylinder; a piston rod of the air cylinder penetrates the bottom of the rack cylinder from the bottom up, and a control lever is horizontally fixed at the end part of the piston rod; two holders are fixed at the end part of a third transmission rod located abovethe rack cylinder, and are opposite, and a cambered surface structure fit with the middle of an apple is arranged in each holder; the cutting mechanism comprises a guiding pillar fixed on the cylinderbody of the rack cylinder; an outer cutting tool comprises an outer blade which has a cambered surface facing a driving motor and is of a branch structure, an inner cutting tool comprises an inner blade of a branch structure, the middle of the inner blade is rotationally matched with a positioning shaft, and the cutting edge position of the branch part of the outer blade is opposite to that of the branch part of the inner blade. While the fruit stems of the apples are cut to complete picking, the fruit stems are lower than the surfaces of the apples, the subsequent operation of fruit growersis reduced, the workload of the fruit growers is reduced, and the situation that the surfaces of other apples are damaged by the apple stems when the apples are in transportation is avoided.

The invention provides a recovery system and a recovery method for gas-phase benzene in caprolactam, and relates to the technical field of benzene recovery. The recovery system comprises an extraction device and a gasification and condensation separator, and the extraction device is in fluid communication with the gasification and condensation separator. Recovered liquid benzene is reused, so that the consumption of benzene in the production system is reduced, the environmental pollution caused by volatilized benzene is avoided, in addition, the whole system is simple in constituent parts and easy to operate, automatic control can be realized, and the operation difficulty of technicians is greatly reduced. The invention further provides the recovery method based on the recovery system for gas-phase benzene in caprolactam. According to the recovery method, the gaseous benzene can be quickly condensed into liquid benzene, the chemical property of the liquid nitrogen is stable, the liquid nitrogen cannot react with the gaseous benzene and other gases at normal temperature and normal pressure, it can be guaranteed that the recycled benzene can be directly utilized, subsequent operation steps such as benzene purification are reduced, and the whole recycling method is convenient to implement.

The invention discloses a method for preparing cyanuric acid by using ionic liquid, and the method comprises the following steps: carrying out condensation reaction on the ionic liquid serving as a solvent and urea in vacuum, stirring and heating states, centrifuging the reaction product, and washing the obtained solid product with water to obtain crude cyanuric acid. The ionic liquid serves as a novel solvent for preparing cyanuric acid through a solvent method, urea is effectively dissolved, heat transfer efficiency is high, energy consumption is reduced, the condensation temperature is reduced to 190-210 DEG C from 220-280 DEG C of a traditional direct pyrolysis method, energy consumption is saved by 16%-24%, the yield of the prepared crude cyanuric acid is 86.6%-90.7%, the purity is 90.7%-96.4%, and the urea conversion rate is 80% or above. The operation process is reduced, the generation of wastes and the use of sulfuric acid in the subsequent refining process are reduced, the problem of solvent volatilization is solved, and the method is simple in recovery and environment-friendly.

The invention discloses sweat-absorbent baby underwear and belongs to the field of baby underwear, a baby underwear main body comprises a sweat-absorbent underwear main shirt formed by weaving pure cotton yarns and a sweat-absorbent underwear front part piece connected with the sweat-absorbent underwear main shirt, and the rear end of the sweat-absorbent underwear main shirt is sewed and connected with a breathable antibacterial back piece through a weaving technology, the breathable bacteriostatic back piece and the breathable bacteriostatic axillary piece are made of the bacteriostatic composite yarn formed by compounding the natural protein single yarn, the natural bamboo single yarn and the pure cotton single yarn, the sweat absorption characteristic of the bacteriostatic composite yarn is kept, and meanwhile the breathability and the low friction property of the natural protein single yarn and the bacteriostatic property of the natural bamboo single yarn are improved, the drying efficiency of the baby underwear body after the back and the armpits of the baby sweat is improved, the phenomena of skin injury, bacterium breeding and the like caused by long-time contact between sweat and the skin of the baby are effectively avoided, the comfort degree of the baby underwear is effectively improved, and the health degree of the skin of the baby is improved.

The invention relates to a novel sewage treatment purification and drying unit. The specific structure is as follows: a chemical measuring pump is connected to a prize rack through a bolt; a connecting circular tube and a vortex high-energy mixer are welded into an integral body and integrally fixed to a floatation tank through bolts; the floatation tank is fixed to the prize rack through a bottom connecting seat; a slag scraper is fixed to the floatation tank through a bearing carrier; a motor single bond is connected to a slag scraper shaft; a solid residue collecting box is welded onto the floatation tank; a funnel is fixed to a laminating machine through a bracket; the laminating machine, a discharge pump and a sewage suction pump are respectively fixed to the prize rack by bolts through the bracket; and a gas storage tank is fixed to the floatation tank through bolts. The purification and drying unit has high sewage treatment capacity, reduces the scum yield, reduces the integral occupied area, and enhances the water treatment effect.