64results about How to "High space-time efficiency" patented technology

The present invention provides a method having no need of any chemical oxidant to prepare solid K2FeO4. It is characterized by that using diaphragm-type electrolytic bath and using DC to make electrolysis in the KOH solution containing stabilizer, and make the electrode containing iron material undergo the process of anodic oxidation to directly obtain the invented solid K2FeO4 whose purity is greater than 90 wt% by means of one step. Said solid K2FeO4 is applicable to make treatment agent for sewage or drinking water and oxidant for organic synthesis. After having been purified it also can be used as positive active substance of alkaline perferrate cell.

An embodiment of the present invention discloses a fast image retrieval method based on deep learning. The method comprises: randomly generating two images from an image database as input of a network, and taking one as a query image and the other as a sample image, wherein each picture comprises a corresponding category tag; constructing a convolutional neural network, wherein the network comprises three sets of convolution pooling layers and two sets of fully connected layers; randomly combining the training sample sets into data pairs to be trained according to the convolutional network, obtaining the corresponding hash code, and calculating the Euclidean distance between two training sample sets; calculating the error function of the output value of the convolutional network, trainingthe convolutional neural network, and updating the network parameters by using the back propagation algorithm and the stochastic gradient descent method; and after obtaining the binary coding of the training data sets, sorting the training data sets according to the Euclidean distances from near to far, and outputting retrieval results in sequence. According to the method disclosed by the embodiment of the present invention, the problems of a slow retrieval speed, a large memory space, and an inaccurate retrieval result in the prior art can be solved, and the space-time efficiency of image retrieval is greatly improved.

The invention discloses a regular expression matching method based on a smart finite automaton (SFA), which comprises the steps of: selecting a proper regular expression rule set; and constructing the SFA; respectively carrying out character string matching on each read test set by an SFA matching method, and carrying out statistics on matching results. Experiment results indicate that: compared with an XFA (Xml Forms Architecture), the SFA has storage space overhead reduced by 44.1 percent, storage access frequency reduced by 69.1 percent and improved space-time efficiency of matching the regular expression. According to the invention, the problem of redundancy mobility edge existing in the XFA is solved, storage space can be effectively saved, and performances of the XFA are improved. Under the environment that the current network bandwidth and the traffic flow rapidly increase, the regular expression matching method provides an effective solution scheme for throughput requirements and storage space demands of line speed data packet processing during application.

The invention discloses an electrolysis unit and a technology used for indirect electric oxo synthesis of organic matters and electrolytic regeneration of media. The electrolysis unit is formed by compression of a plurality of elementary electrolytic cells which are connected in series through a plate-and-frame filter press, wherein, the elementary electrolytic celles comprise anode chambers and cathode chambers which are separated off by cation diaphragms; the anode chambers and the cathode chambers are respectively provided with electrolyte inlets and electrolyte outlets which are communicated with electrolyte storage tanks; and anodes which are arranged inside the anode chambers adopt granular packed bed electrodes which take titanium baskets or titanium baskets provided with coatings as frame bodies. By adoption of the electrolysis unit, low valence state media which are generated during the process of indirect electric oxo synthesis of the organic matters are reoxidized and regenerated into high valence state media through electrolysis. The electrolysis unit has the advantages of large working current, convenient opening of a pressure filter for replacement of the diaphragms and filling of granules, compact structure and high space-time efficiency and is particularly suitable for indirect electric oxidation regeneration reaction by adoption of Mn<3+> / Mn<2+>, Ce<4+> / Ce<3+> and Cr2O7 <2-> / Cr 3+> as media.

The invention belongs to the technical field of gene engineering and enzyme engineering and particularly relates to carbonyl reductase mutants and an application thereof. Carbonyl reductase ChKRED20 is subjected to molecular modification by the aid of crystal structure based semi-rational design, one or multiple amino acids is / are replaced, a series of mutants wide in substrate spectrum are obtained, and application potential of the mutants in biological catalysis is displayed.

The invention discloses a photocatalytic air purifier which takes a light-emitting diode as light source, a dust-resistant filter net which is detachable and easy to clean is arranged at an air inlet which is arranged on the lower part of a shell body of a purifier, the dust-resistant filter net which is detachable and easy to clean is arranged at an air outlet which is arranged on the upper part of the shell body; a light-emitting diode array which is taken as the light source and a photocatalytic layer are parallelly arranged in the shell body, the photocatalytic layer is composed of a modified titanium dioxide photocatalyst which is loaded on an activated carbon fiber; the photocatalytic layer of the air purifier simultaneously has the effects of absorption enrichment and photocatalytic degradation of volatile organic compounds, thereby effectively improving the efficiency of the photocatalytic degradation; the light-emitting diode array is adopted as the light source, thereby overcoming the defect of uneven illumination of an ultraviolet lamp tube and being characterized by high optical to electrical conversion rate, long service life and high space and time efficiency, the high-low arrangement of the light-emitting diode array and the photocatalytic layer utilizes the characteristic that gas is raised after heating to realize the effective convection of air without a fan, thereby reducing the energy consumption and simplifying the device.

The invention discloses a 3, 6- dichloro pyridine methanamine electrolytic synthesis method and device, which comprises the following steps: using 3, 4, 5, 6-tetrachloro pyridine aminic acid for main electrolysis material; placing electrolytic solution in electrolysis bath to electrolyze; getting 3, 6- dichloro pyridine methanamine by neutralizing, cooling, crystallizing, filtering and drying; carrying on toughening treatment for cathode of electrolysis bath by periodic reversible power of thyristors. The device is composed of power, dosage bunker, electrolysis bath, wherein the power is stabilized voltage and permanent flow, which can control the cycle reverse power; the power connects to current commutator; program control unit is installed for current commutator; the anode of power is connected to anode of electrolysis bath; the minus pole of power connects to cathode of electrolysis bath.

The invention discloses a three-level flow sequence comparison method based on a many-core co-processor. The purpose of increasing the comparison speed of sequence comparison software is achieved. According to the technical scheme, sequence comparison is performed in a multi-threading manner by an MIC (microwave integrated circuit) many-core co-processor; three serial steps of reading sequences from a main memory to an MIC, comparing the sequences and writing a comparison result to the main memory in a sequence comparison process of the MIC are in a three-level flow mode, namely, sequences required for next comparison are read during sequence comparison, a previous comparison result is written into the main memory, and a reading and writing operation and a comparison operation are carried out simultaneously. By the three-level flow sequence comparison method based on the many-core co-processor, three main processes of sequence reading, sequence comparison and comparison result returning are carried out simultaneously, the comparison efficiency is improved, and the comparison time is shortened. Compared with a two-channel eight-core CPU (central processing unit), the three-level flow sequence comparison method has the advantages that the speed of a comparison process can be increased 2.3 times at least, a large amount of memory space is prevented from being copied, and the space-time efficiency of a procedure is improved.

The invention discloses equipment for treating organic wastewater through the joint of electrolyzation and oxidants. The equipment comprises an electrolysis bath, a circulating system and a storage tank, wherein a water inlet and a drainage outlet are formed on the storage tank, one end of the electrolysis bath is connected with the storage tank through the circulating system, the other end of the electrolysis bath is directly connected with the storage tank, the circulating system comprises a circulating pump and a pipeline, and the equipment is characterized in that the oxidants are added into the electrolysis bath, an electrode is arranged in the electrolysis bath, and the electrode is connected with direct current; during operation, waste water firstly enters into the storage tank and then flows into the electrolysis bath from one end of the electrolysis bath through the circulating pump, in case of making current, electrolytic reaction and oxygenolysis reaction occur in the electrolysis bath, waste water flowing through the electrolysis bath flows out from the other end of the electrolysis bath and then returns to the storage tank; and the process is repeated until organic matters in waste water are degraded to meet the required level.

The invention discloses a database abnormality query detecting method based on target condition relevance rules. The method comprises a rule mining method and an abnormality detecting method, wherein the rule mining method comprises an initialization phase, a frequent-item generation phase and a target condition relevance rule generation phase; the abnormality detecting method adopts a rule bank obtained in the rule mining process to carry out abnormality detection; and just when the rule existing in the rule bank meets the rule support conditions, the operation is normal, otherwise, the operation is abnormal. For the invention, the rule mining efficiency, the detection efficiency and precision are high; the detection failure and the omission factor are low; and the universality and the expansibility are high.

Production of diphenyl carbonate from trichloromethyl-carbonate ester adopts tubular reactor to increase contact effect and has more yield.

The invention provides the method and device to produce the mannitol and potassium iodate by electrolysis. The potassium iodate is produced by electrolyzing the I2 in anode and the mannitol is produced by electrolyzing the sucrose in cathode. The beta -PbO2 / Ti is as anode and the stainless steel, the nickel plate are as cathode. It uses the anion membrane or dipole membrane as septum; the temperature is 30-60deg.C, the current flow density is 3.0-5.0A / dm2. The anode solution is the KOH solution with I2; the cathode solution is sucrose hydrolyzing solution and Raney' s nickel catalyzer. After electrolyzing, the anode solution rime to get the potassium iodate and cathode solution include the mannitol and sorbitol; so by controlling the temperature and rime, we can get the mannitol product, the electrolysis efficiency can reach above 150%.

The invention discloses a device for preparing high-purity tetrapropylammonium hydroxide (TPAOH). The device is a plate-and-frame repolarization type electrolytic device improved from a plate-and-frame filter press. The device comprises a filter press, a filter press beam, a filter press thrust plate, a filter press pressing plate and a repolarization type electrolytic cell. The repolarization type electrolytic cell is composed of 1-50 electrolytic cell units in a tight pressing manner. Each electrolytic cell unit is a three-chamber two-membrane electrolytic cell body, that is, an anionic membrane, a cationic membrane, a cathode and an anode are used for forming an anode chamber, a raw material chamber and a cathode chamber. The device effectively separates non-electrolytic TPAOH, avoids sodions brought in by exchanging column regeneration and improves the product quality; expensive bipolar membranes are avoided, large current density can be adopted for electrolysis, current efficiency higher than that of an electrodialysis method is achieved, and the current efficiency is close to 100 %; and continuous electrolysis can be adopted, a market TPAOH solution with the concentration being about 7.5wt% can be directly obtained through the product, and the concentration working procedure is reduced.

Carbonyl reductase ChKRED12 is subjected to molecular improvement through a semi-rational design method, so that a mutant with significant changes in enzymatic properties is obtained. The stereo-selectivity of the mutant M191S is improved, and the activity is improved by 4 times; the stereo-selectivity of each of combined mutants Q151F / M191L and Q151Y / M191L is reversed, and the activity is improved by about 3 times. The mutant with a reversed configuration can be catalyzed to obtain a chiral product with a parent-catalyzed reverse configuration, so that a bio-catalysis toolbox is enriched.

The invention discloses a high average utility sequence pattern mining method under a non-overlapping condition. The invention relates to the technical field of electric digital data processing. According to the method, a candidate set is generated by using a pattern growth method, the average utility value of the candidate patterns is quickly calculated on line by using a queue data structure, and a high utility sequence pattern can be mined under a non-overlapping condition. The defect that the number of candidate patterns is difficult to reduce under the condition that a pattern utility value does not accord with a downward closure characteristic in the research of high-utility pattern mining in the prior art is overcome, the completeness of calculation is ensured, the number of the candidate patterns is greatly reduced through a pruning strategy, and the time-space efficiency of calculation is improved.

The present invention belongs to the technical fields of genetic engineering and enzyme engineering, and particularly relates to a carbonyl reductase mutant and a use thereof. The carbonyl reductase ChKRED20 can asymmetrically reduce 2-chloro-1-(3,4-difluorophenyl)ethanone to obtain a ticagrelor intermediate (S)-2-chloro-1-(3,4-difluorophenyl)ethanol (e.e. value is larger than 99%), and an error-prone PCR technique and a single-point saturation mutation technique are used to conduct directed evolution of the enzyme molecule to obtain 11 mutants with enzyme activity increased by 1.6-10 times, showing an application potential of the mutant in biocatalysis.

The solvent-free one-step process of synthesizing cyclohexyl methyl dimethoxy silane with methyl dimethoxy silane, cyclohexane halide and magnesium powder in the molar ratio of 1 to 1 to 1-1.5 as material includes compounding material; mixing and heating methyl dimethoxy silane, magnesium powder and catalyst in the amount of 0.1-0.5 % of methyl dimethoxy silane under the protection of N2 and through stirring; dropping slowly 5-15 % of cyclohexane halide; refluxing the materials inside the reactor for 30-40 min while maintaining the temperature; dropping the residual cyclohexane halide; maintaining the temperature for one other 30-40 min; and cooling, filtering and rectifying the filtrate to obtain cyclohexyl methyl dimethoxy silane product. The present invention has the advantages of reasonable, simple and practical process, high yield and high conversion rate, etc.

The invention discloses a preparation method of a cyclic phosphonate flame retardant, which relates to the technical field of organic phosphorus flame retardant synthesis. The method comprises the following steps of taking trimethylolpropane and trimethyl phosphite as raw materials with the feed mole ratio of 1: 2-4, selecting methyl benzenesulfonate or methyl p-toluenesulfonate as a catalyst, controlling proper process parameters such as catalyst quantity, temperature, time and the like, and carrying out transesterification and rearrangement reaction to obtain the phosphonate flame retardantwith a cyclic structure and the byproduct dimethyl methylphosphonate flame retardant. The method provided by the invention has the advantages of few raw material varieties, easy source, low cost, rapid reaction, high efficiency, environment-friendly process, energy conservation and consumption reduction; the product prepared by the method is the same as the product prepared by the existing method,but the production period is shortened by 2 / 3-3 / 4, the production capacity is greatly improved, and the method is suitable for industrial production.

The invention provides a preparation method for allyl silane. The structure general formula of the allyl silane is disclosed in formula (I), wherein R, R' and R'' are the same or different, at least one hydrolytic activity group is kept, and R, R' and R'' are respectively and independently selected from alkoxyl groups, halogen, alkyl groups, unsaturated alkyl groups or aryl groups. The preparation method comprises the following steps: S1: under a nitrogen atmosphere, mixing and heating R<1>R<2>R<3>SiR<4>, magnesium chips and a catalyst; S2: in a mixed solution of the S1, adding a certain quantity of halopropene to react; S3: enabling a reactant in S2 to react for 4-6 hours at a backflow temperature; S4: adding residual halopropene, continuously reacting, keeping the temperature for 30-50 minutes, and after reaction is finished, filtering and purifying to obtain the allyl silane. According to the preparation method provided by the invention, inflammable and explosive solvent does not need to be used for participating in the reaction, production risks are avoided, technical steps are greatly simplified, cost is lowered, a target product is synthesized at the lowest production cost, meanwhile, the product can be easily obtained, and a reaction yield is high.

The present invention provides a method for preparing solid K without using any chemical oxidant 2 FeO 4 Methods. That is, using a diaphragm electrolytic cell, in a KOH solution containing a stabilizer, and direct current electrolysis, the iron-containing material electrode is directly anodized in one step to directly obtain a solid K with a purity greater than 90wt%. 2 FeO 4 . The solid K prepared by this method 2 FeO 4 It can be used as a treatment agent for sewage or drinking water and an oxidant for organic synthesis. It can also be used as a positive electrode active material for alkaline ferrate batteries after being purified. The process of the invention can run continuously, the electrolyte can be recycled, has high efficiency, low cost and no pollution.

The invention belongs to the field of chemical synthesis, and particularly relates to a method for synthesizing a noble metal MOFs composite material. The method comprises the steps of: firstly preparing a solution containing metal hydroxide from a metal salt solution, an alkali liquid and a dispersant by adopting a normal-temperature normal-pressure liquid phase synthesis method, then adding a salt solution of noble metal, performing stirring, adding an organic ligand solution to obtain filter residues, drying the filter residues to obtain the noble metal MOFs composite material. The noble metal MOFs composite material has a very short cycle of synthesis, the method is suitable for industrial large-scale production, and the obtained MOFs material has good catalytic performance and high activity as a probe in a reaction; and the method can be widely applied to researches and production of novel catalyst materials.

The invention relates to the technical field of wastewater treatment, in particular to a three-dimensional electrochemical-ozonation coupling treatment device for wastewater difficult to treat, and a wastewater treatment method. The device comprises a three-dimensional electrochemical-ozonation coupling reactor, and the three-dimensional electrochemical-ozonation coupling reactor comprises a reactor tank body; and a cathode and an anode which are connected with each other through a direct-current power supply are arranged in the reactor tank body, a particle electrode is also filled in the reactor tank body, the particle electrode is positioned between the cathode and the anode, a microbubble ozone distributor is arranged at the bottom of the reactor tank body, and the microbubble ozone distributor is connected with an ozone generator. The method comprises the following steps: after being subjected to electric flocculation and primary filtration, wastewater difficult to treat enters the three-dimensional electrochemical-ozone coupling reactor and is treated. The particle electrode is filled between the cathode and the anode, so that the mass transfer effect under the electrifying condition is improved, and the current efficiency, the electrochemical reaction rate and the treatment effect of the wastewater treatment method adopting the device are greatly improved.

The invention belongs to the technical field of pharmaceutical engineering, and particularly relates to a micro-reaction system and a method for continuously preparing 2-methyl-4-amino-5-aminomethylpyrimidine by using the micro-reaction system. The method comprises the following steps: modifying a Raney nickel catalyst by using formalin, filling a micro-channel reactor with the modified Raney nickel catalyst; simultaneously conveying hydrogen and a substrate solution containing both 2-methyl-4-amino-5-cyanopyrimidine and an alkaline agent into the micro-reaction system comprising a micro-mixerand the micro-channel reactor which communicate with each other in sequence; and carrying out a continuous catalytic hydrogenation reaction to obtain the 2-methyl-4-amino-5-aminomethylpyrimidine. Compared with the prior art, the method provided by the invention has the advantages that reaction time is only several minutes, the yield of the product 2-methyl-4-amino-5-aminomethylpyrimidine is greater than 99%, a technological process is continuous, an automation degree is high, space-time yield is high, operation is simple and convenient, the separation steps of reaction liquid and a catalyst is not needed, cost is low, and industrial production is easy.

The invention relates to a method for preparing a dialdehyde compound employing periodate regenerated by an electrochemical method for cyclically and lastingly oxidizing annular ortho diol in a closed system, and relates to electrolytic regeneration and recycling processes of expensive periodate. The method has the advantages that the dialdehyde substance is high in yield, high in purity and high in production efficiency; the periodate and an organic solvent are circulated in the overall flow, so that the production cost is reduced; no pollution is generated; and a reactor and an electrolytic bath are simple in structure, so that a gas is not required, the material consumption is low, and energy consumption is low.

The invention relates to a catalyst for preparing gamma-butyrolactone by gaseous phase dehydrogenation of 1, 4-butanediol under normal pressure and a preparation method thereof. The catalyst is composed of CuO, ZnO, Al2O3 and SiO2, and the unreduced catalyst is prepared from the following ingredients by weight percentage: 30-60% of CuO, 15-50% of Zn, 5-25% of Al2O3 and 10-30% of SiO2. The grain diameter of the catalyst is phi 5*5mm, and the catalyst is easy to restore, and has high activity and high selectivity, and long service life under a reaction process condition; the conversion rate of 1, 4-butanediol is greater than or equal to 99%, and the selectivity of the 1,4-butanediol for generating gamma-butyrolactone is greater than or equal to 96.5%.

The invention relates to a solvent-free synthesis method and application of cobaltosic oxide. A divalent cobalt source and an alkali source are fully mixed through a solid-phase grinding method, thenthe mixture is stood and heated to form the cobaltosic oxide; the solvent-free synthesis method has characteristics of no use of any solvent, relatively mild operation temperature, high synthesis space-time efficiency, good gas sensitivity to acetone, toluene and other gases; in addition, the cobaltosic oxide synthesized by the solvent-free method has high capacitance density, and has good prospect in application of a battery negative electrode material.

The present invention discloses a method for preparing antioxidant peptides by using proteases to hydrolyze vegetable proteins. Soybean protein isolate powder is mainly used as a raw material, papainand bromelain are used as catalysts, and a one-pot hydrolysis reaction is carried out at conditions of a protein concentration of 10% (w / v), an enzyme concentration of 5% (w / w) of raw material mass and suitable temperature and pH. The used protease combination has high specificity, peptide products are high in stability and the reaction is high in reproducibility. The peptides obtained by the hydrolysis are of suitable molecular weight and high in yield, and also have certain antioxidant activity. Moreover, the obtained antioxidant peptides are rich in amino acids and high in nutrient content,and have important applications in the fields of food and cosmetics.

The invention belongs to the technical field of biological medicines, and particularly relates to a micro-reaction system and a method for continuously preparing (R)-3-hydroxyhex-5-enoate by using thesame. The method comprises the following steps: simultaneously loading carbonyl reductase and isopropanol dehydrogenase on an inert solid medium to prepare a carbonyl reductase / isopropanol dehydrogenase co-immobilized catalyst, then filling a micro-channel reactor with the carbonyl reductase / isopropanol dehydrogenase co-immobilized catalyst, and pumping a substrate solution containing 3-carbonylhex-5-enoate into the reactor, and carrying out continuous enzyme catalyzed asymmetric reduction reaction to obtain the (R)-3-hydroxyhex-5-enoate. Compared with the prior art, the method has the advantages that the reaction time is only several minutes, the yield of the product (R)-3-hydroxyhex-5-enoate is higher than 95%, the technological process is continuous, the automation degree is high, thespace-time yield is high, moreover, the operation is simple and convenient, the separation step of the reaction liquid and the catalyst is not needed, the cost is low, and the industrial production iseasy.

The invention discloses a database abnormality query detecting method based on target condition relevance rules. The method comprises a rule mining method and an abnormality detecting method, wherein the rule mining method comprises an initialization phase, a frequent-item generation phase and a target condition relevance rule generation phase; the abnormality detecting method adopts a rule bank obtained in the rule mining process to carry out abnormality detection; and just when the rule existing in the rule bank meets the rule support conditions, the operation is normal, otherwise, the operation is abnormal. For the invention, the rule mining efficiency, the detection efficiency and precision are high; the detection failure and the omission factor are low; and the universality and the expansibility are high.

The invention discloses a preparation method of a complex metal oxide modified titanium dioxide type solid acid and a catalytic synthesis method of polytetrahydrofuran ether using the same. With the catalyst, the metal ions form a complex oxide on the surface of titanium dioxide through a roasting mode. The catalyst is used for modifying molybdenum oxide and the oxides of the metals of the 4th, 5th and 6th periods on the surface of titanium dioxide, including the lanthanide series. The temperature of the polymerization reaction is 10-50 DEG C, and the conversion rate of the polytetrahydrofuran ether is 50-80%. The catalyst prepared by the method disclosed by the invention avoids equipment corrosion caused by the catalysis of traditional protonic acid catalyst, does not generate a great quantity of wastewater neutralizing acid liquid, and reduces environmental pollution; and moreover, the catalyst can be repeatedly used, and the production cost is lowered.