57results about How to "Overcoming Vulnerability" patented technology

The invention relates to the technical field of integrated circuits, in particular to a drive circuit for GaN power devices. The drive circuit for the GaN power devices is characterized by comprising a high-channel drive module, a low-channel drive module, the GaN FET Q1 and the GaN FET Q2. High-channel power supply voltage HB and high-channel ground potential HS are adopted for the high-channel drive module, and the output end of the high-channel drive module is connected with the grid electrode of the GaN FET Q1. Power supply voltage VDD and ground potential VSS are adopted for the low-channel drive module, and the output end of the low-channel drive module is connected with the grid electrode of GaN FET Q2. The drain electrode of the GaN FET Q1 is connected with external voltage VIN, and the source electrode of the GaN FET Q1 is connected with the drain electrode of the GaN FET Q2. The drive circuit for the GaN power devices has the advantages that the situation that voltage across the two ends of a bootstrap capacitor exceeds the maximum limit gate-to-source voltage of the GaN FETs is effectively prevented, and the problems that as GaN FETs are not provided with body diodes, a bootstrap circuit is overcharged within dead time, and a high-end FET is prone to damage are solved. The drive circuit is especially applicable to the GaN power devices.

The invention relates to a start verification method and system. The method includes: integrating a miniboot including first verification information in a CPU (central processing unit) of a master chip in advance, storing second verification information used for verifying a uboot in a flash of the master chip, embedding third verification information used for verifying kernel and recovery in the uboot; when the master chip is started, utilizing the first verification information in the miniboot to verify the second verification information; when verification passes, utilizing the second verification information to verify the uboot, starting the uboot when the uboot is legal, then allowing the uboot to utilize the third verification information to verify the kernel and the recovery, and starting the kernel and the recovery when the kernel and the recovery are legal; if verification in any link does not pass, failing in start. By multistage serial verification, higher safety guarantee is brought to intelligent terminals.

The invention discloses a method for dynamically encrypting and decrypting data document, which comprises that in network condition, via C / S mode, manager centralized controls important documents of user computer, the system dynamically decrypts and encrypts clear text, the important documents can only be read or changed under the control of server in special network condition, which content is shown as cryptogram when off the network condition, when user copies clear text document from other places, the documents can not be changed when the system is sensitive, or else, in storage, the documents are converted into cryptogram type. The invention is based on software platform, correlated only with operation system, but not application programs, to dynamically encrypt and decrypt the data documents, therefore, the data documents can only work in private network condition, while the leaked document is in cryptogram type, to protect intellectual property.

The invention discloses a method and a device for purifying VOCs (Volatile Organic Compounds) through gas-phase photolysis and liquid-phase photocatalytic oxidation. The method comprises the following steps: S1, gas-phase photolysis: irradiating the VOCs under an UV (Ultraviolet)-light condition, enabling the photolysis time to be less than 1s, generating ozone by reaction, and forming a mixed gas by the ozone and a residual gas after photolysis; S2, liquid-phase photocatalysis: carrying out reverse gas-liquid contact on the mixed gas obtained in S1 and catalyst slurry, enabling the mixed gas to fully react with the catalyst slurry, and enabling the mixed gas to be converted into CO2 and H2O. According to the method for purifying the VOCs through the gas-phase photolysis and the liquid-phase photocatalytic oxidation, disclosed by the invention, the gas-phase photolysis and the liquid-phase photocatalytic oxidation are effectively combined, and the two steps influence each other, work together and cannot be divided; the problems of catalyst deactivation and low liquid-phase absorption efficiency of the VOCs due to deposition of an intermediate product on a gas-solid catalytic surface are fundamentally solved; through a synergistic effect of multiple processes of high-energy ultraviolet photolysis, the liquid-phase photocatalysis, ozone catalytic oxidation and the like, the generation and the deposition of the intermediate product are reduced, and efficient and stable degradation of organic waste gas is realized.

The invention relates to a pressure release valve, in particular an ultrahigh-pressure release valve with an aim to overcome defects and problems of complicated structure, leakage of pressure medium, high use and maintenance cost and difficulty in maintenance. The ultrahigh-pressure release vale comprises an ultrahigh-pressure one-way valve and a hydraulic cylinder used for driving opening and closing of the ultrahigh-pressure one-way valve, a flange cover plate is fixed on a cylinder barrel of the hydraulic cylinder, the flange cover plate and valve blocks on the ultrahigh-pressure one-way valve are fixed through bolts, and a piston rod of the hydraulic cylinder and the one-way valve are sealed by a pressure plate and sealing rings. A valve seat and a valve spool are additionally arranged on the ultrahigh-pressure one-way valve. By modifying the connecting structure between the ultrahigh-pressure one-way valve and the hydraulic cylinder, the sealing structure among the piston rod of the hydraulic cylinder and control holes, and the structure of the ultrahigh-pressure one-way valve, the defects and problems existing in products of the prior art are overcome, and the pressure release valve is reasonable and unique in the modified structure, modified products are compact in structure, excellent in performance and more reliable in use and service lives are prolonged.

A method for preparing molecule surface engram polymer has the steps as follows: fix the pattern molecule on the carrier surface, wash that not being combined by buffer solution, dry the carrier; hatch the synthesized monomer, cross linking reagent and functional monomerand the pattern molecule fixed on the carrier surface for combining pattern protein molecule and function monomer to be compound and distributing function monomer on the surface of pattern protein; add initiator to cause polymerization, fix the compound formed by pattern molecule and function monomer on the polymer surface; wash the engram polymer for clearing away the pattern molecule remarked in it, finally acquire the product. The invention makes the engram of molecule on the surface of material, which eliminates hard washing of pattern molecule embedded in polymer as well as makes the pattern molecule engram, and greatly advances the recognition to substance and dynamic performance.

A pharmaceutical composition for improving biological activity stability of human urinary kallikrein is disclosed. The composition chooses one or combination of the following ingredients: mannitol, dextran intradex, hydrolyzed gelatin and sodium citrate to prepare liquid. In clinical practice, it is used for dissolving freeze dried human urinary kallikrein, then being dissolved to large volume liquid. It can delay evidently the decreasing of the human urinary kallikrein activity.

The invention relates to the detection of corrosion-causing microorganisms in an environment, and particularly relates to a method for detecting sulfate reducing bacteria in a water environment. The method comprises the following steps of: after centrifuging a sample to be tested, culturing sediments in a selective culture medium for 3-4 days under anaerobic conditions; centrifuging and taking liquid supernatant; adding a zinc nitrate solution which is 1 / 9 of the volume of the liquid supernatant, uniformly mixing with the liquid supernatant, and then centrifuging to obtain sediments; adding a methylene blue solution into the sediments, uniformly mixing and then irradiating the mixed solution under an ultraviolet lamp for 1.5-2.0 hours, thus detecting the sulfate reducing bacteria in the sample to be tested through absorbance. According to the invention, a characteristic metabolic product of the sulfate reducing bacteria is combined with a detection method so as to achieve higher selectivity; and meanwhile, the defect that the culture period of the traditional method is long and the detection time is greatly shortened. According to the invention, by utilizing an optical method for detection, the method has the advantages of simple needed equipment, small operation difficulty, cheap material and very high accuracy.

A process for preparing a long rod-shaped tool handle with reinforcing core includes such steps as determining the length and material of reinforcing core, making a module hanging hole on the top end of reinforcing core, putting it in a mould, passing a nail through said hanging hole to hang the reinforcing core in the center of moulding cavity, injecting plastics into said moulding cavity, demoulding, removing excessive length, and making an installation hole.

The invention discloses a method for rapidly determining acrylamide in vegetable oil by QuEChERS-LC-MS / MS. The method comprises: extracting acrylamide in the oil sample by acetonitrile; and after freezing and degreasing, purifying the supernatant by MgSO4, C18, PSA and GCB adsorbents, separating by a C18 chromatographic column, carrying out gradient elution by adopting a methanol -0.1% formic acidaqueous solution mobile phase, detecting by adopting a triple quadrupole mass spectrometry electrospray multi-reaction monitoring mode (MRM), and quantifying by adopting an internal standard method.The acrylamide has a good linear relationship in a concentration range of 1-500 ng / mL, and the correlation coefficient is greater than 0.997. The detection limit of the method is 2 [mu]g / kg, and the quantification limit is 5 [mu]g / kg. The adding standard recovery rate is 96.4%-108%, and the relative standard deviation is less than 7.74%. The method has the advantages of simple and efficient pretreatment operation, direct on-machine determination without concentration, good recovery rate, high sensitivity, and accurate qualitative and quantitative determination.

The invention discloses a Chewing tablet of 'Liuwei Dihuang' and its preparation, which has the advantages of quick release rate, high biological availability, good taste, accurate dosage, and easiness in administration and carrying. The method can be used for treating dizziness, tinnitus, hectic fever and perspire during sleep.

The invention relates to a leather bag processing technology. The technology comprises the following steps that S1, a TPU film is attached to leather by using a hot-pressing film laminating machine toobtain the coated leather, wherein the hot-pressure laminating machine comprises a machine body, a carrying table arranged on the machine body, a hydraulic cylinder and a pressing plate connected with a power output shaft of the hydraulic cylinder, a travel switch is arranged on the top surface of the carrying table, the travel switch is electrically connected with the hydraulic cylinder, and thecarrying table is provided with a lifting mechanism used for adjusting the height of the travel switch; S2, the coated leather obtained in S1 is cut to obtain a bottom leather layer, a front leatherlayer, a back leather layer and two side leather layers; S3, the bottom leather layer is sequentially connected with the two side leather layers by using high-frequency equipment; S4, the high-frequency equipment is used for making the front leather layer connected to the bottom leather layer and the two side leather layers; S5,the back leather layer is connected to the bottom leather layer and the two side leather layers by using high-frequency equipment. Meanwhile, the invention provides a leather bag processed through the technology. The leather bag has the advantage of improving the strength and attractiveness.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a Ni-Ru / AC bimetallic catalyst and a preparation method and application thereof in lignin degradation.The preparation method comprises the following steps: dissolving nickel nitrate hexahydrate in water, adding activated carbon, and stirring into paste, then carrying out dipping, stirring, drying, roasting and metal reduction so that a Ni / AC metal catalyst is obtained, dissolving ruthenium chloride trihydrate in water, then adding the Ni / AC metal catalyst, stirring to be pasty, and then carryingout dipping stirring, drying, roasting and metal reduction so that the Ni-Ru / AC bimetallic catalyst is obtained. According to the method, the characteristic that hydrogenation activity of Ni metal hasadvantages in lignin degradation is combined, compared with other catalysts, the catalyst has the advantages of simple preparation method, high degradation efficiency, high reusability and the like,the hydrogenation activity of the Ni metal is directly improved by dipping a small amount of noble metal Ru, and the defect that the Ni metal is easy to inactivate is overcome.

The invention relates to sugar-free fudge composition containing probiotics and a preparation method of the sugar-free fudge composition. The sugar-free fudge composition containing probiotics is prepared from the following raw materials in parts by mass: 2-20 parts of probiotics, 10-90 parts of prebiotics pulp, 1-20 parts of colloid, 1-15 parts of gloss oil and 10-30 parts of water. The sugar-free fudge composition containing probiotics can supplement the prebiotics while supplementing the probiotics, and is of great help to maintain intestinal health, reduce constipation and promote absorption of vitamins and minerals; the sugar-free fudge composition containing probiotics contains higher content of living probiotics and can meet demand for the probiotics supplement of people; the probiotics in the composition have better stability, and therefore, the composition is suitable for long-term shelf storage.

The invention discloses a method and device for preparing garlic oil with racemate alliin as raw materials. The method includes the following steps: (1) loading garlic, green onion, onion or allium chinensis into a reactor after the garlic, the green onion, the onion or the allium chinensis is washed, peeled and triturated, then adding an alliin solution, meanwhile, leading in air, and stirring and / or carrying out the reaction under the ultrasound condition, and (2) adding organic solvents into a reaction system after the reaction begins to carry out continuous extraction, obtaining extracted liquor, then adding edible fat and oil, water, ethyl alcohol or acetic acid into the extracted liquor, enabling the extracted liquor to be concentrated and separated in a vacuum mode at the temperature of 30-100DEG C, and obtaining the garlic oil. According to the method for preparing the garlic oil, the racemate alliin is added in the garlic, alliinase contained in the garlic is used for enabling the alliin to be converted into the garlic oil, the natural attribute of the garlic oil is kept, the yield of the garlic oil can be greatly improved, the method is simple and easy to achieve, and quite remarkable economic benefits are achieved.

The invention relates to a method for generating glycol through a two-step catalytic hydrogenation reaction of oxalate. The method is realized by adopting oxalate and hydrogen as raw materials, utilizing the coupling of the series connection and the parallel connection of a plurality of reactors and arranging a circulating hydrogen compressor. The hydrogenation reaction depth can be well controlled through the series connection, so the service life of a catalyst is prolonged; and the hydrogen: ester ratio of a whole technological system can be greatly reduced on condition that hydrogen: ester ratios of all reactors are not reduced through the parallel connection. Compared with the prior art, the method of the invention well solves the catalyst service life problem when glycol is produced through the hydrogenation of oxalate in non-petrochemical engineering routes and engineering amplification problems of the overlarge compressor load during the large scale production of glycol, so the method can be widely applied to the industrial production of glycol.

The invention relates to a system and a method for preparing ethylene through acetylene hydrogenation. The system comprises a mixed pressure increasing unit, a catalyst protection unit, a hydrogenation reaction unit, a cryogenic separation unit, a vacuum filtration unit, a revolving bed generation unit and a vacuum low-pressure distillation unit. The method comprises steps as follows: acetylene and hydrogen are mixed under increased pressure; feed gases obtained after mixing are sequentially introduced into the catalyst protection unit and the hydrogenation reaction unit for a reaction; gaseous products obtained after the reaction are separated, a product ethylene, byproducts and surplus hydrogen are obtained, and the surplus hydrogen is sent to the reaction unit; slurry in a slurry reactor is led out and separated by the vacuum filtration unit, and a solid-phase material and a liquid-phase material are obtained; the solid-phase material is treated by the revolving bed generation unit, and a regenerated catalyst is obtained; the liquid-phase material is treated by the vacuum low-pressure distillation unit, and a solvent is recovered. The system and the method have the advantages as follows: operating flexibility is high, energy consumption of a compressor is low, the service life of the catalyst is long and the adaptive capacity is high.

The invention discloses a reactor provided with a sludge discharging device for enhancing stable operation of aerobic granular sludge, and a method thereof. The reactor comprises a water inlet unit, a reactor body, an aeration unit, a sludge discharging unit and a water discharging unit, wherein the sludge discharging unit comprises a first solenoid valve, a sludge collecting tank and a first peristaltic pump, and a sludge outlet at the middle part of the reactor main body is connected with the sludge collecting tank through a pipeline provided with the first solenoid valve; a liquid level meter used for detecting the height of a liquid level is arranged in the sludge collecting tank, a first turbidity sensor is arranged near the liquid level in the sludge collecting tank, and a second turbidity sensor is arranged at the bottom of the sludge collecting tank; and a muddy water outlet at the bottom of the sludge collecting tank is divided into two paths by a pipeline, one path is directly outward discharged through a pipeline provided with the second solenoid valve, and the other one path passes through the first peristaltic pump and returns to the reactor from the bottom of the reactor main body. The mud discharging unit can judge whether the muddy water is fully clarified or not in order to realize secondary treatment of residual sludge, effectively control the muddy age and highly-efficiently enrich functional microorganisms.

The invention discloses nano black selenium with peroxidase simulating activity, and a preparation method of the nano black selenium, and belongs to the fields of preparation and application of nano materials. The preparation method is as follows: nano-sized black elemental selenium is prepared from selenium dioxide as a raw material and concentrated sulfuric acid as a reducing agent under a solvent thermal condition. The substance has catalytic activity of similar peroxidase; and chromogenic reaction of a peroxidase substrate 3,3',5,5'-tetramethyl benzidine and hydrogen peroxide can be catalyzed, so that the preparation method is simple; the reaction product is easy to separate and purify; the used reaction apparatus and reagent are low in price; the defects that a natural enzyme is difficult to purify and high in price are overcome; and the nano black selenium can be applied to a working environment with easy occurrence of denaturation, and has a good application prospect in the field of green synthesis of a water-soluble conductive polymer.

The invention discloses a catalyst for preparing normal propyl alcohol through hydrogenolysis of glycerinum and a preparation and using method thereof. The prepared metal-heteropolyacid bifunctional catalyst is suitable for taking water as a solvent in a hydrogenolysis reaction to prepare propyl alcohol, using of volatile, polluted or toxic solvents is avoided, the catalyst is green and environmentally friendly, and meanwhile, the production cost is reduced; meanwhile, the catalyst adapts to the characteristic, that a large amount of moisture is contained, of the by-product glycerinum which isgenerated through a biodiesel device, and overcomes the defect that an existing catalyst is prone to losing activity in a water-containing environment.

The invention relates to a method for synthesizing a water-soluble conductive polymer by using a nano black selenium peroxide mimic enzyme as a catalyst, belonging to the technical field of preparation and application of nano materials. The nano black selenium peroxide mimic enzyme is nano black simple substance selenium prepared from selenium dioxide under solvothermal conditions by using concentrated sulfuric acid as a reducer. The substance has similar catalytic activity to peroxidase, and can be used for catalyzing synthesis of the water-soluble conductive high-molecular polymer. According to the synthesis method, a polymer monomer is used as a raw material, the nano black selenium is used as the catalyst, water is used as a reaction medium, and ambient oxygen is used as an oxidizer to obtain the water-soluble conductive polymer in a buffer solution with the pH value of 2.2-4.2. The method has the advantages of green synthesis technique and no pollution, and overcomes the defects in the traditional chemical process which needs non-environment-friendly persulfate oxidizers and organic solvents.

The invention discloses a device and method for rapid cultivation of aerobic granular sludge based on sludge-age control. The device comprises a water inlet unit, a reactor body, an aeration unit, a drainage unit, a sludge discharging unit and a control unit. The reactor body is a columnar double-layer cylinder, an inner cylinder serves as a reaction area, an area between the inner cylinder and an outer cylinder serves as a sludge storage area, a water outlet in the inner cylinder is connected with a sludge opening of the sludge storage area through a pipeline with a first solenoid valve, and the bottom of the outer cylinder of the sludge storage area is provided with a sludge discharging pipe with a second solenoid valve. The device for the rapid cultivation of the aerobic granular sludge has the advantages that the sludge age is easily and effectively controlled and the occupied area of a reactor is reduced, the running mode of controlling the sludge age during sludge discharging can be achieved, and the problem is solved that sequencing batch reactors (SBR) easily lose stability under the condition of not regulating the sludge age.

The invention relates to surface modified aramid, a surface modifying method and application, and aims at solving the technical problems of low interfacial shear strength of aramid and epoxy resin andeasily inactivated plasma processed aramid surface. The surface modified aramid is prepared from aramid and surfactant, and is characterized in that the surfactant is epoxy resin containing a nitrogen heterocyclic ring structure, and is 0.2-5 percent of the weight of the surface modified aramid. The problem can be well solved by adopting the technical scheme of performing plasma surface treatmentbefore surfactant treatment on aramid. The surface modifying method can be used in industrial production of surface modified aramid.

The invention relates to a route detection device of a waste material extruding cylinder. The route detection device comprises an extruding cylinder shearing blade. The route detection device is characterized by being further provided with a positioning guide groove, a slide rod, a metal rod, electromagnetic sensors and a bracket, wherein the slide rod is fixedly connected with the edge of the extruding cylinder shearing blade; the positioning guide groove is fixedly arranged on the bracket; the axis of the positioning guide groove is parallel to the axis of the extruding cylinder shearing blade; the slide rod is located in the positioning guide groove and is in sliding fit with the positioning guide groove; the metal rod is vertically fixedly arranged on the slide rod; the bracket is fixedly arranged on the foundation; three to six electromagnetic sensors are distributed on the bracket; the distance between each electromagnetic sensor and the metal rod is adjustable; the metal rod is matched with every electromagnetic sensor in sequence. According to the route detection device of the waste material extruding cylinder, the detection device outside the extruding cylinder is used for replacing an encoder in the extruding cylinder so that the defects that sensing devices are easy to damage and detection signals are fluctuated are overcome; the working rate of a set is improved and the utilization period of the extruding cylinder is prolonged; the maintenance working amount and the maintenance cost are reduced. The route detection device of the waste material extruding cylinder is simple in structure, low in cost and stable to operate.

The invention provides an encryption threshold signature method based on an obfuscation technology. The method comprises the following steps: generating a public parameter p and a private key fragmentski of a member according to a Setup algorithm; generating an encryption public key pke and a decryption private key ske of a receiver according to an encryption key generation algorithm; performingobfuscation processing on the private key fragments ski according to an obfuscation algorithm to obtain an obfuscated signature private key, performing message signature on a message m to be sent according to the obfuscated signature private key to generate a ciphertext, and sending the ciphertext to an information receiver. Due to the fact that the confusion technology is adopted, the threshold signer conducts confusion processing on the private key fragments, the problem that in the prior art, leakage is caused due to the fact that the private key fragments are prone to being attacked is solved, the private key fragments of the signer are effectively protected, and the safety of the private key fragments is greatly improved.