44results about How to "Troubleshoot compositing" patented technology

The invention provides a combined method for separating catalytic cracking oil slurry and preparing oil-based needle coke. Use C3-C5 light hydrocarbon fraction as extraction solvent to carry out subcritical or supercritical extraction of catalytic cracking oil slurry, and the obtained extracted oil phase is recovered by supercritical solvent to make extraction components, and the extraction components are used as the preparation of mesophase pitch Raw materials, the mesophase pitch is prepared by thermal polycondensation reaction, and then the mesophase pitch is prepared by delayed coking reaction to obtain high-quality oil-based needle coke. When the sulfur content of the catalytic cracking oil slurry is high, the extracted light components can be hydrodesulfurized first, and the hydrogenated oil can be fractionated to obtain the hydrogenated tail oil, and the hydrogenated tail oil can be used as the raw material for the preparation of mesophase pitch, and then prepared needle coke. The method of the invention is independent of the preparation of the mesophase pitch and the coking process of the needle coke, which is more conducive to the realization of industrialization, and can make full use of catalytic cracking oil slurry and prepare high-quality needle coke materials.

The invention relates to a face recognition method and a base image synthesis method under illumination change conditions. According to the face recognition method, quotient images are firstly calculated; nine base images of corresponding objects are respectively synthesized according to formulas; illumination parameters Eta of images to recognized are calculated; one frame of novel images of each object, consistent with the illumination conditions of the images to be recognized are synthesized; the projection factor vectors Rho I and Rho of the synthesized images and the images to recognized in a principal component analysis (PCA) space are calculated by a main ingredient analytical method; and the Euclidean distance between two vectors is calculated, and the classification recognition is completed by a nearest neighbor method. The methods provided by the invention have the advantages that one frame of images of each object under the normal illumination condition is used as the training set, a higher recognition rate can be reached, and in addition, the illumination change influence can be perfectly overcome, so the face recognition and base image synthesis problems under the illumination condition are effectively solved.

The invention discloses a liraglutide synthesis method, which comprises the following steps: 1, preparing a Fmoc-Gly-Wang resin; 2, preparing a fully-protected peptide resin from the Fmoc-Gly-Wang resin, protected amino acid and Pal-Glu, the fully-protected peptide resin comprising Depsipeptide Units; 3, performing TFA pyrolysis on the peptide resin to obtain crude peptide; 4, dissolving the crudepeptide obtained in Step 3, regulating the PH and performing ester bond to amido bond reaction to obtain a liraglutide crude product. According to the method, the Depsipeptide Units are introduced toobtain the fully-protected peptide resin and then pyrolysis and ester bond to amido bond reaction are performed to obtain a target product; by introduction of the Depsipeptide Units, problems about synthesis of difficult sequences of the liraglutide can be solved, and the purity and the yield of the synthesized crude peptide can be greatly improved.

The invention provides a method for synthesizing trifluoromethanesulfonate. Trifluoromethanesulfonic anhydride and orthoester are used as reaction reagents to synthesize trifluoromethanesulfonate in high yield under the mild condition. The conventional trifluoromethanesulfonate synthesizing method related by the invention not only is high in reaction temperature and inconvenient to operate, but also is difficult to separate and purify. The method provided by the invention can be used for enabling reaction under the very mild condition, and can be used for synthesizing certain unstable trifluoromethanesulfonate which is difficult to synthesize by the conventional method. Moreover, the only by-product in the product is low-boiling ester, and is very easy to remove.