3results about How to "Little correlation" patented technology

The application provides an LDPC code decoding method and device, electronic equipment and storage medium. The method comprises the following steps: obtaining an input code word, a grouped check matrix and an initial confidence of an LDPC code, wherein the grouped check matrix is obtained by grouping an original check matrix according to a preset condition; presetting two initial quantization values with a given magnitude bit width, calculating an initial companion based on the input code word and the grouped check matrix; starting from the initial companion and the two initial quantization values, performing decoding iteration column by column, updating a current column variable node in the iteration, obtaining a soft decision message and transmitting the soft decision message to a next column, updating an associated grouped check node, and performing post-processing compensation on an oscillation correctable code word; updating the companion after each column is updated and judging a decoding success condition; and outputting a result when the condition is met or a maximum iteration number is reached. The scheme can realize the collaborative optimization of decoding performance and hardware implementation efficiency.

The application provides a selective hydrogenation method, comprising the following steps: providing a hydrogenation catalyst, which is a carbon-coated nickel nanocomposite with sulfur-containing urea on the surface; contacting a hydrogenation substrate, hydrogen and the catalyst, and catalyzing the reaction under the condition of liquid-phase hydrogenation; the benzene ring of the hydrogenation substrate contains a nitro group and a carbon-carbon unsaturated bond simultaneously. When the benzene ring of the hydrogenation substrate contains a nitro group and a carbon-carbon unsaturated bond simultaneously, the hydrogenation method and the catalyst can hydrogenate the nitro group with high activity and high selectivity.

The utility model provides a kind of reaction heat utilization device and cyclohexene preparation system, belong to cyclohexene preparation technical field.It is used for benzene partial hydrogenation reactor, and benzene partial hydrogenation reactor has cooling coil, reaction heat utilization device includes heat-removing water storage tank;Power pump, the water outlet of heat-removing water storage tank and the water inlet of cooling coil are connected;Flash tank, the feed inlet of flash tank is connected with the water outlet of cooling coil;Steam compressor, the steam export of flash tank is connected with the air inlet of steam compressor, and the air outlet of steam compressor is used to connect heat equipment.The reaction heat utilization device effectively utilizes the reaction heat of preparation cyclohexene.