38results about How to "Timely removal" patented technology

The vacuum chemical plating process for preparing composite metal film includes the first pre-modification of porous film by means of sol-gel technology to introduce one transition layer containing metal crystal seed with self-catalytic reduction activity to the chemical plating, and the subsequent vacuum chemical plating by means of forming different vacuum degrees on two sides of the modified porous composite film. The process can raise the hydrogen permeating performance of the composite metal film and raise the stability of the composite metal film.

The present application relates to the technical field of data processing, and provides a cache data detection method, device, computer equipment, and storage medium. The method includes: when an input cache detection request is received, acquiring a cache detection script corresponding to item information; running the cache Detect the script, obtain the js code of the target project; generate an abstract syntax tree corresponding to the js code; traverse all objects in the abstract syntax tree, obtain the first key of each first cache data contained in the js code; and obtain the cache cleared The second key of the second cached data is processed; based on the third key whose matching result between the first key and the second key is a match failure, acquire and display the target cached data corresponding to the third key. The application can quickly detect the target cache data that has not been cleared in the local cache. The present application can also be applied to the blockchain field, and data such as the above-mentioned target cache data can be stored on the blockchain.

The invention discloses a pollination method for increasing the yield of spring Amomum, and the pollination method for increasing the yield of Amomum comprises the following steps: 1. field management before pollination, 2. collecting pollen, 3. manual pollination, 4. pollination after pollination manage. Beneficial effects: artificially pollinate the spring amomum by combining pollination at the flowering stage and pollination at the bud stage, using repeated spot pollination to increase the probability of successful pollination, and remove pollen-free or dense female plants and male plants in time , to improve the fruit setting rate of Amomum sativa, and supplement nitrogen, phosphorus and potassium fertilizers in time to ensure the nutrients needed for the growth of Amomum sativa fruit, thereby increasing the output of Amomum sativa.

The method for preparing long-chain dicarboxylic acid dialkyl ester uses dicarboxylic acid of C8-C18 and excess C6-C18 monobasic alcohol as raw material, adopts proper acidic resin as catalyst, and makes them implement esterification reaction at higher temp., at the same time of esterification the formed water content is evaporated out, the conversion rate of reaction can be raised, and the reaction liquid can be undergone the processes of distillation, etc. and can be purified. Said invention has the advantages of short process, high esterification rate, short operation period, and low energy consumption, etc.

The invention belongs to the technical field of epoxy resin preparation, and particularly relates to a preparation method of an active epoxy resin diluent with the low total chlorine content. The method comprises the steps that a compound catalyst is adopted in an etherification open loop reaction to improve the reaction efficiency, an alkaline solution and a mixture of a special reducing agent tris(2-carboxyethyl)phosphine and Zn powder are continuously added into a reaction system of an obtained chlorohydrin ether intermediate to inhibit a side reaction, and mixed liquid of alkali metal hydroxides and quaternary ammonium salt is lastly added for refining. According to the preparation method, the technology is stable, few by-products are generated, material consumption and energy consumption are low, and a large amount of epoxy chloropropane is not needed in the epoxy resin preparation process, so that the production cost is reduced; the product is stable, low in hydrolyzed chlorine content and low in chrominance; the epoxy resin diluent prepared through the method has the advantages that the total chlorine content is lower than 700 ppm, the hydrolyzable chlorine content is lower than 100 ppm, the viscosity is lower than 6 mPa / s, and the epoxide equivalent ranges from 245 g / eq to 275 g / eq.

The invention relates to a preparation method of long carbon chain cyano acid, which belongs to the technical field of organic synthesis. First put the dibasic acid and catalyst into the reaction kettle, replace it with nitrogen, heat it to a molten state, start the cooling liquid of the packed tower, and slowly feed ammonia gas; then start the gas circulation pump, and automatically replenish nitrogen during the process, and the reaction time is 1 ~3 hours, and then quantitatively complete the required ammonia gas. The present invention adopts specific equipment, a specific process flow, and sets strict process conditions to prepare cyanoacid products, especially like 8-cyanoctanoic acid and 9-cyano nonanoic acid, which are synthetic nylon 9 and Front intermediate of nylon 10.