4results about How to "Small amplification effect" patented technology

The application discloses a kind of image edge detection methods of biological retina multiscale receptive field iteration in the field of image processing and computer vision, including obtaining image to be handled, and pre-processing image to obtain input image.The application is by with center point belonging to an edge edge point in local slice and center point is classified as first edge, the rest is classified as second edge;Subsequently, with the tangent of center point, local slice is divided, and in the partition, from center point outwardly emit ray, if the direction of ray exists second edge point, then the average value of image value in the region within second edge is assigned to the region outside second edge, form compensation slice, the compensation operation is corrected to the pixel distribution in the detection process in adjacent second edge direction, so that the response of center point when subsequent second derivative is reconvolved is weakened, the positioning stability under adjacent interference is improved, positioning deviation caused by adjacent edge interference, multiscale result inconsistency and other problems are avoided.

This invention relates to a continuous flow synthesis method for hydroquinone, a chemical and pharmaceutical intermediate, belonging to the field of chemical intermediate synthesis. The method for preparing hydroquinone uses phenol as a starting material, which undergoes oxidation to obtain p-benzoquinone, followed by hydrogenation reduction to obtain hydroquinone. Both steps are performed in a microreactor system. The synthesis method includes the following steps: (1) Phenol, catalyst 1, and organic solvent are prepared as component A, and an oxidant is used as component B. A and B react in a microchannel reactor 1 to obtain intermediate I benzoquinone; (2) Intermediate I benzoquinone is mixed with an organic solvent and reacted with hydrogen in a microchannel reactor 2 under the action of catalyst 2 to obtain hydroquinone. This invention utilizes a microreactor system with excellent heat and mass transfer performance, significantly shortening the reaction time. Both steps are completed within 50 minutes, and the reaction efficiency is high, energy consumption is low, safety is high, automation is high, and the environment is environmentally friendly.

This invention relates to a method for synthesizing hydroquinone, a pharmaceutical and chemical intermediate. The invention comprises the following steps: (1) hydrolysis of p-chloronitrobenzene in an alkaline solution, adjusting the pH to 5-6 with acid to obtain p-nitrophenol; (2) reduction of p-nitrophenol and hydrogen under catalytic conditions to obtain p-aminophenol; (3) diazotization of a dilute acid solution of p-aminophenol with sodium nitrite; the reaction solution reacts with a dilute acid solution used for hydrolysis to obtain hydroquinone; after the reaction, solvent extraction is performed, followed by concentration, centrifugation, and drying. The reactions are carried out in a microreactor system. Compared with existing hydroquinone production processes, this invention uses continuous flow technology for continuous production, greatly improving production efficiency and saving production costs. It solves the problems of high levels of waste, low selectivity, and high purification costs associated with traditional batch processes. Furthermore, the continuous flow production process has a lower scale-up effect, easier process control, and is suitable for industrial production.

This utility model discloses a micro-volume confluence mixing reaction device, solving the technical problem that existing microchannel emulsification reaction devices are prone to blockage or damage under high temperature or corrosion-resistant conditions, resulting in discontinuous emulsification reactions. It includes a support frame, a confluence mechanism assembly, and a confluence tank. A diaphragm pump draws material from a storage tank and transports it to the confluence mechanism assembly, which then transports the material to the confluence tank for confluence. The confluence mechanism assembly includes a confluence plate body and multiple sets of confluence port devices mounted on the confluence plate body. Each set of confluence port devices has a pipe installation channel communicating with the confluence tank. An inlet regulating pipe is connected to the upper inlet of the pipe installation channel of each set of confluence port devices, and an outlet manifold is connected to the lower outlet. The lower part of the outlet manifold extends into the confluence tank, and the lower part of the inlet regulating pipe is sealed to the outlet manifold. This device can be widely used in the field of microchemical reaction equipment technology.