33results about How to "Low application value" patented technology

Belonging to the field of agricultural breeding, the invention discloses a health care sand for pigeon breeding. The health care sand comprises the following raw materials by weight part: 35 of shell powder, 30 of medium sand, 10 of fly ash, 5 of calcium hydrogen phosphate, 2 of charcoal, 3 of salt, 3 of yeast, 1.5 of trace elements, 0.5 of iron oxide, 0.5 of gentian, 0.5 of Andrographis paniculata, 0.5 of licorice, 0.6 of lysine, 0.4 of methionine, 2 of sodium selenite, 2 of sugar, 2 of vitamin AD3, and 1.5 of gypsum powder. The invention can enhance the mineral content of health care sand, strengthen meat pigeon physique and improve breeding filed benefit.

The invention relates to novel chloroethyl nitrosourea with anticancer activity and a synthesizing method thereof. The chloroethyl nitrosourea is a compound with a structure of the general formula (I), wherein n is an integer of 2 to 6. The chloroethyl nitrosourea can be used for treating gliomatosis cerebri, colon cancer and leukemia; compared with the existing nitrosourea-type anticancer medicine, the drug resistance is lower, the chemical therapy effect is better, the preparation method is simple in operation, the reaction yield is high, the toxicity is small, the cost is low, the method is suitable for the industrialized production, the development prospect is wide, and the application value is good.

The invention belongs to the field of new emergency security materials, particularly relates to a water-based aerogel efficient fire extinguishing agent, and further discloses a preparation method thereof, According to the water-based aerogel efficient fire extinguishing agent, the inorganic aerogel powder, the template agent, the phosphorus-containing flame retardant, the nitrogen-containing flame retardant and the hydrophilic colloid stabilizer are used as raw materials, wherein the efficiency of the fire extinguishing agent is greatly improved by utilizing the ultralow heat conductivity coefficient and ultrahigh adsorption capacity of the inorganic nano porous aerogel; meanwhile, the phosphorus-containing flame retardant and the nitrogen-containing flame retardant are combined to serveas related functional components of the fire extinguishing agent, and the colloid stabilizer and the ion buffer agent are added into the water-based flame retardant, so that the uniformity and the expiration date of the flame retardant are increased, and the fire extinguishing agent has an efficient fire extinguishing function, a good fireproof function and a good flame retardant function; in addition, the fire extinguishing agent also has longer quality-guaranteeing storage life, and the fire extinguishing variety, efficiency and application range are effectively expanded.

The invention discloses a new method of preparing alkyl cyanophenyl. The new method comprises the following steps: alkylbenzene is used as raw material, is processed through chloromethylation to obtain alkyl benzyl chloride first, and then is processed through ammoxidation to prepare the alkyl cyanophenyl. In the new method, the reaction-path is short, the reaction temperature is low, the yield rate is high, and the selectivity is high. The invention also discloses a high efficiency catalyst used for preparing the alkyl cyanophenyl through the ammonia oxidation process. The catalyst is silica gel or a vanadium chromium five-component system loaded by aluminum oxide, wherein, the vanadium chromium five-component system is VaCrbCcDdEeOx; the catalyst can effectively catalyze the alkyl benzyl chloride to act ammoxidation to obtain the alkyl cyanophenyl; the high efficiency catalyst has the advantages of high activity, high product yield rate, good selectivity, high product purity, long service life, simple technology, etc.

Belonging to the technical field of food processing, the invention provides a coarse cereal instant drink and a production method thereof. The coarse cereal instant drink is prepared from the following substances by weight: 5-10 parts of black bean powder, 10-20 parts of red bean powder, 20-30 parts of oat flour, 10-20 parts of red date powder, 10-20 parts of walnut kernel powder, 5-10 parts of Chinese wolfberry powder, 2-5 parts of Houttuynia cordata powder, and 1-4 parts of ginger powder. According to the coarse cereal instant drink and the production method thereof, the drink has comprehensive nutritional components and good medicinal and health care effect, can meet the comprehensive demands of human body for nutrition and daily health care demands, is especially suitable for the sub-health population to drink, and can improve immunity to reach the health care effect.

The invention discloses an NO2 gas sensitive element based on an rGO-SnO2 nanometer composite material and a preparation method thereof, and belongs to the technical field of graphene-metallic oxide composite material gas sensitive elements. The gas sensitive element mainly consists of an electrode component and the rGO-SnO2 nanometer composite material uniformly coated on the electrode component, the microstructure of the rGO-SnO2 nanometer composite material comprises SnO2 nanospheres uniformly grown on a reduction-oxidation graphene sheet layer, the diameters of the SnO2 nanospheres are 40 to 70 nm, and the material is of a square cassiterite phase structure. The rGO-SnO2 nanometer composite material with large specific surface area, low specific resistance and high dispersibility is prepared by using a one-step hydrothermal method, and then the NO2 gas sensitive element is prepared by taking the rGO-SnO2 nanometer composite material as a gas sensitive coating. The gas sensitive element effectively solves the problems that traditional NO2 gas sensitive elements are relatively high in operating temperature and graphene gas sensitive elements are relatively low in sensitivity and relatively long in recovery time, and has preferable application values and development prospects.

The invention belongs to the technical field of microwave testing, and discloses a clamp de-embedding method and system, a storage medium, a computer program and application, and the method comprisesthe steps: employing a clamp to clamp two different transmission lines, and respectively measuring S parameters [St], i.e. [St1] and [St2], of the whole system; calculating S parameters [St01] and [St02] of the two different sections of transmission lines clamped by the clamp according to a formula; setting an appropriate initial value [S], and approximating the S parameter [S] of the clamp. The comparison between the clamp simulation data and the calculation data finds that the clamp S parameter data at the two ends of the tested piece can be accurately and effectively extracted by adopting the clamp de-embedding method of the double transmission lines, and a good foundation is laid for subsequent semiconductor parameter testing. Compared with a traditional calibration method, the methodhas the advantages of being easy to implement and machine and low in requirement for the machining precision of standard parts, and has good application value.

The invention provides a technical scheme of a treatment method of wastewater containing amino compounds by copolymerization and extraction. At normal temperature and normal pressure, the scheme comprises the following steps of: (1) placing the organic wastewater containing the amino compounds into a copolymerization and extraction reaction tower, regulating the pH value of the wastewater to 5.7-6.5; (2) adding an extracting agent, wherein the volume ratio of the extracting agent to the wastewater is 1: 100-1: 1000, and the extracting agent is of oleic acid or methyl oleate; (3) performing aeration reaction on the wastewater in the reaction tower, wherein the time of the aeration reaction is 2-6 hours; (4) standing for 5-30 minutes after the aeration reaction; (5) performing liquid-liquid separation on the wastewater in the reaction tower after standing, sucking out an extraction phase in the upper layer after reaction, placing into a decompression distillation reaction device, performing decompression distillation and recovering the extracting agent, so that low-concentration organic wastewater generated after copolymerization and extraction is left in the reaction tower; and (6) further performing treatment on the low-concentration organic wastewater through a biochemical treatment method and discharging the wastewater after the wastewater achieves the standard.

The invention belongs to methods for killing bacteria and fungi in chlamydomonas reinhardtii and discloses a method for sterilization in a chlamydomonas reinhardtii culture process by mixture of tebuconazole and nalidixic acid. The method includes: A, inoculating chlamydomonas contaminated by mixed bacteria onto a TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in an occulting light period of 14 / 10 and under the light intensity of 8000Lx; C, transferring the chlamydomonas well grown on the TAP solid medium plate to a TAP plate with mixed antibacterial agents, and culturing for 5-8 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx; D, transferring the sterilized chlamydomonas to the common TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx to achieve a standby for subsequent experiments or breed conservation. The method has the advantage that the problem of bacterial contamination in scientific experiment and application process of chlamydomonas is solved by adoption of the mixed antibacterial agents for treating bacterial and fungus contamination of chlamydomonas.

The invention provides a manufacturing method of a composite sweetening agent. The front taste of the composite sweetening agent is soft, the after taste is pure, no impurity taste is observed, and the mouthfeel is close to that of saccharose. According to the manufacturing method, trehalose, arabinose (ingredient A), a dihydrochalcone glucoside, L-glycine and a derivative of L-glycine (ingredientB), and a other natural sweet component (ingredient C) are uniformly mixed based on a certain formula, or are dissolved in water based on a formula ratio, and then are subjected to condensation crystallization or spray drying so as to obtain a finished product. The dihydrochalcone glucoside natural product is capable of enhancing sweet taste and inhibiting bitter taste, and L-glycine and the derivative of L-glycine are capable of removing impurity taste and covering adverse after taste, so that a defect that common sweetening agents possess adverse mouthfeel is avoided, the sweetness of the composite sweetening agent is more close to that of saccharose, the mouthfeel is excellent, calorie is low, cost is low, and the composite sweetening agent can be widely used in processing of food andbeverage.

The invention relates to the technical field of thermoelectric materials, and particularly discloses a method for improving the performance of a BiSbTe-based thermoelectric material. The method comprises the following steps: weighing Te particles, Sb particles, Bi powder and Cu1.8S powder according to a chemical general formula Bi0.42Sb1.58Te3(Cu1.8S)x, filling a quartz tube with the Te particles,the Sb particles, the Bi powder and Cu1.8S powder, and performing vacuumizing, wherein x is greater than 0 and less than or equal to 0.3%; putting the quartz tube into a vertical tube furnace, carrying out heat preservation for 15-20 hours at the temperature of 900-1,000 DEG C, and carrying out furnace cooling to obtain an initial cast ingot; grinding the cast ingot by adopting a high-energy ballmill to obtain powder; and performing heat preservation of the powder for 4-8 min at the temperature of 410-450 DEG C and the sintering pressure of 40-60 MPa through a spark plasma sintering process,and obtaining the BiSbTe-based thermoelectric material, wherein the material has high conductivity, the bipolar effect is remarkably inhibited, the ZT value is increased, and the temperature for obtaining the highest ZT value is regulated and controlled.

The invention discloses a special catalyst for preparing 3, 4-dichlorobenzonitrile. The carrier of the special catalyst is a silica gel-carbon nitride composite carrier formed by doping carbon nitridewith silica gel, and the composition of a loaded active component is shown as VSbbPcDdEeGgOx, wherein D is boron, lanthanum, cerium, samarium, europium, scandium, chromium, molybdenum, bismuth or tungsten, E is titanium, zirconium, manganese, iron, cobalt, nickel, copper, zinc or tin, and G is lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium or barium. The invention also discloses a preparation method and application of the catalyst. In the composite carrier of the special catalyst prepared by the method, carbon nitride is used as Lewis base to perform Lewis acid-base reaction with an active component used as Lewis acid so that the action of the active component and the carrier is enhanced, the loss of the active component is reduced, the active component is dispersed more uniformly, and the strength and wear resistance of the catalyst are improved; the service life is prolonged; and the oxidation-reduction capability of the catalyst and the coordination capability with reactants can be adjusted by utilizing the carbon nitride so that the activity and the selectivity of the catalyst are improved.

The present invention discloses a method of extracting garlic polysaccharide from the garlic deep processing water, belonging to the extracting and separating field of polysaccharide. The garlic polysaccharide is recycled and extracted form the garlic deep processing water by adopting the ultrafiltration technique and spray-drying technology. Compared with prior art, the garlic polysaccharide extracting method of the present invention has the advantages of lower cost, simple flow, and easy realization, and the garlic polysaccharide can be recycled farthest from the garlic deep processing water, reducing the enterprise production cost and pollution control cost.

The invention relates to efficient expression purification and application of mannase and homolog thereof and GLP1 recombinant fusion protein. By carrying out high-density fermentation induced secretory expression on pichia pastoris by using a gene recombination technique, the mannase and homolog thereof and GLP-1 recombinant fusion protein are obtained; the high-yield mannase and homolog thereofand GLP-1 recombinant fusion protein are obtained by a filtering and concentrating separation and purification method, the fermentation expression quantity is high, the separation steps are simple, and the limitations of low drug yield, high cost, frequent injection and the like of the existing GLP-1 analogue are solved. the mannase and homolog thereof and GLP-1 recombinant fusion protein not onlyhave an injection hypoglycemic effect, but also can reduce blood sugar and reduce weight through oral administration, and have a good application value in patients with obesity and early diabetes; and meanwhile, a basis is provided for further researching the mechanism of reducing blood sugar and reducing weight of mannase and homolog thereof and GLP-1 recombinant fusion protein.

The invention discloses a convolutional neural network hardware accelerator with a novel convolution operation acceleration module. The convolutional neural network hardware accelerator comprises an operation process management module; a parameter table module; a feature map caching module; a novel convolution operation acceleration module. The novel convolution operation acceleration module comprises: an input feature map pre-fetching module for reading input pixel points from a feature map cache; a product module which is used for multiplying the input pixel point by the convolution kernel weight; an output feature map access module which is responsible for reading an old intermediate result of the output pixel point from the feature map cache and writing a new intermediate result of theoutput pixel point back to the feature map cache; and an accumulation module which is used for completing the accumulation work of the operation result of the product module and the old intermediateresult of the output pixel point. According to the convolutional neural network hardware accelerator with the novel convolutional operation acceleration module, the convolutional operation process inthe convolutional neural network can be accelerated, and the convolutional neural network hardware accelerator has great application value in many mobile terminal devices with the characteristics of low data transmission bandwidth, low power consumption and few logic resources.

The invention belongs to the technical field of artemisinin derivatives, and particularly relates to an artemisinin-chlorambucil ester compound and a preparation method thereof. In order to solve the problems that the tumor effect of artemisinin needs to be improved, the toxic and side effects of chlorambucil are large and the like, artemisinin-chlorambucil ester with a novel structure is designed and synthesized according to a pharmacophore splicing principle, and the structure of the artemisinin-chlorambucil ester compound is represented and determined by 1H NMR, 13C NMR and HRMS-ESI. The compound has good anti-tumor activity, and the toxic and side effects of chlorambucil are reduced. The preparation method is simple, the obtained derivative is high in anti-tumor activity and low in toxic and side effects, a novel medicine is provided for tumor resistance, and the derivative has good application value.

The invention relates to a preparation method of a clay mud inhibitor, as well as a product and application thereof. The preparation method comprises the following steps of (1) heating maleated rosin,premixing the maleated rosin and polyethylene glycol, and carrying out esterification reaction to obtain an intermediate product; (2) adding anhydrous sodium carbonate into the intermediate product obtained in the step (1), continuously reacting, and obtaining the clay mud inhibitor. Since the long and widespread problem that a concrete aggregate contains mud so as to influence the concrete quality exists, the invention provides a new solution, the clay mud inhibitor obtained through the preparation method provided by the invention is a modified abietic acid polycarboxylic acid mud inhibitor,and the clay mud inhibitor is regulated to have a specific molecular weight and a structure through the preparation method, so that the sensitivity of a low polycarboxylic acid water reducing agent on a clay is effectively reduced. When the mud content of the aggregate is higher, the mud inhibitor can inhibit the aggregate from adsorbing the water reducing agent, so that the adverse effects of big additive dosage fluctuation, reduced concrete strength, instable quality, difficulty in construction and the like caused by the reason that the aggregate contains the mud can be effectively overcome, the construction quality safety is further improved, and the clay mud inhibitor has a larger application value.

The invention discloses an energy-saving environment-friendly non-burnt brick and a preparation method thereof. The non-burnt brick is characterized by being prepared from the following raw materialsin parts by weight: 10 to 40 parts of red plain soil, 10 to 40 parts of construction waste, 4 to 10 parts of cement, 10 to 20 parts of lime, 3 to 5 parts of silica fume, 2 to 4 parts of sodium chloride, 1 to 3 parts of polyacrylamide, 5 to 8 parts of glutinous rice, and 1 to 3 parts of gel. According to the invention, the land occupation problem by construction waste is solved, also a plurality ofwaste materials and building debris are used to replace mud sand, pebbles and the like, so that environmental damage caused by excessive exploitation caused by use of mud sand is avoided, at the sametime reuse of waste is realized, comprehensive utilization, turning waste into treasure and turning harm into profit are realized, resources are effectively utilized and ecological environment is protected; and meanwhile, the problem of air pollution caused by discharge of non-burnt bricks is solved, environment is protected, and production costs are saved, and the non-burnt brick has good economic benefits and has good application value.

The invention discloses a method of utilizing electric furnace slag to prepare spherical vaterite calcium carbonate centralized in granularity distribution. The method includes steps: mixing the electric furnace slag with ammonium chloride solution for reaction to obtain leachate containing calcium ions; feeding carbon dioxide gas into the leachate for reaction to generate calcium carbonate granules. The method is characterized by adding ammonia water into the leachate and feeding carbon dioxide in a microwave radiation state for reaction at the same time. Calcium carbonate prepared by the method has a centralized granularity distribution range and is spherical, stable in performance and high in added value, and crystal form of calcium carbonate has the characteristics of vaterite.

The invention discloses a method for preparing 2,5-dichlorobenzonitrile. The method comprises the following steps: 1) using p-dichlorobenzene and formaldehyde or / and paraformaldehyde as raw materials, in the process of chloromethylation and catalyst Under the action, the only chloromethylation product 2,5-dichlorobenzyl chloride is obtained by chloromethylation reaction; 2) the product 2,5-dichlorobenzyl chloride obtained in step 1) is used as raw material, and ammonia, oxygen Ammoxidation reaction occurs under the action of catalyst to obtain 2,5-dichlorobenzonitrile. The invention also discloses a special catalyst used in the above method for preparing 2,5-dichlorobenzonitrile and a preparation method thereof. Compared with other methods, the method of the invention has the advantages of cheap and easy-to-obtain reaction raw materials, simple and convenient process route, low reaction temperature, environmental friendliness, strong selectivity, high yield and the like. The special catalyst has high selectivity and activity; the preparation method is simple, the cost is low, and the catalyst has good thermal stability and mechanical strength, and can be used in both fixed-bed and fluidized-bed reactors.

The invention relates to the high-efficiency expression, purification and application of mannanase and its homologues and GLP-1 recombinant fusion protein. Through gene recombination technology, the mannanase and its Homologs and GLP-1 recombinant fusion protein, obtained high-yield mannanase and its homologues and GLP-1 recombinant fusion protein through the separation and purification method of filtration and concentration, with high fermentation expression and simple separation steps, It solves the limitations of the current GLP‑1 analogues, such as low yield, high cost, and frequent injections. The mannanase of the present invention and its homologue and GLP-1 recombinant fusion protein not only have the hypoglycemic effect of the injection, but also can lower the blood sugar and reduce body weight through oral administration, and have a great effect on obese and prediabetic patients. Good application value. At the same time, it provides a basis for further research on the mechanism of lowering blood sugar and weight loss of mannanase and its homologues and GLP-1 recombinant fusion protein.

The invention discloses a special catalyst for preparing 2, 6-dichlorobenzonitrile by an ammonia oxidation method. The special catalyst is a multi-component inorganic composite oxide loaded by a silica gel-carbon nitride composite carrier, and the composition of the active component of the catalyst is shown as VMobBcCodDeOx, wherein D is lithium, sodium, potassium, rubidium, cesium, magnesium, calcium or barium. The invention also discloses a preparation method and application of the catalyst. Organic matters containing nitrogen and carbon and silica sol are respectively added as precursors ofcarbon nitride and silica gel for mixed calcination to form the silica gel-carbon nitride composite carrier. compared with a common silica gel carrier, the silica gel-carbon nitride composite carrierhas the advantages that the effects of the inorganic oxide and the carrier are enhanced, the strength and the wear resistance of the catalyst are improved, the inorganic oxide is dispersed more uniformly, the loss of catalyst components is reduced, and the service life of the catalyst is prolonged; meanwhile, the carbon nitride can also adjust the acid-base property, oxidation-reduction capability and coordination capability with reactants of the catalyst so that the activity and the selectivity of the catalyst are improved. The catalyst is simple in preparation method and good in thermal stability and mechanical strength.

The invention belongs to methods for killing bacteria and fungi in chlamydomonas reinhardtii and discloses a method for sterilization in a chlamydomonas reinhardtii culture process by mixture of tebuconazole and nalidixic acid. The method includes: A, inoculating chlamydomonas contaminated by mixed bacteria onto a TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in an occulting light period of 14 / 10 and under the light intensity of 8000Lx; C, transferring the chlamydomonas well grown on the TAP solid medium plate to a TAP plate with mixed antibacterial agents, and culturing for 5-8 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx; D, transferring the sterilized chlamydomonas to the common TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx to achieve a standby for subsequent experiments or breed conservation. The method has the advantage that the problem of bacterial contamination in scientific experiment and application process of chlamydomonas is solved by adoption of the mixed antibacterial agents for treating bacterial and fungus contamination of chlamydomonas.

The invention discloses a technical scheme of a remote sensing time sequence abnormity detection method. The method can synchronously detect a plurality of time abnormities existing in a remote sensing time sequence, the confidence coefficient of all the abnormities is 95% and the abnormal confidence coefficient of the single abnormity is greater than 99% when the significance level alpha is 0.05, and time information, level information, degree information and confidence coefficient information of the abnormities are provided synchronously. According to the basic thinking, firstly, first-order season difference is performed on an original remote sensing time sequence to obtain a difference sequence serving a season error sequence; robustness estimation is performed on the mean value and the standard deviation of the season error sequence, and z standardization is performed on the season error sequence to obtain a standard score sequence serving as a time sequence abnormity test statistic sequence; a test statistic critical value is calculated under control of a given significance level and a multiple test total error rate; the absolute value and the critical value of the test statistic sequence are compared, the abnormities are marked as abnormal points when preset conditions are met, p values of the abnormities are calculated according to the test statistic of the abnormal points and converted into the confidence level. The abnormities in the remote sensing time sequence are detected through the procedure, and the time information, the level information, the degree information and confidence coefficient information of the abnormities are obtained.

The invention discloses a method for producing a high molecular polymer material. The method comprises: S1. Flowing the first reaction raw material flow containing diolefins into the first reaction zone, and polymerizing under the action of a catalyst to obtain The flow of polydiene rubber; S2. The flow obtained in step S1 is passed into the second reaction zone, and the added second reaction raw material flow containing monoolefin monomer continues to undergo polymerization reaction to obtain an intermediate product flow; S3, The intermediate product stream in step S2 is melt-kneaded in the presence of a crosslinking agent to obtain the high molecular polymer material. The product of the invention is a performance thermoplastic elastomer, which has the advantages of plastic and rubber, and has good toughness, elasticity, stretchability and elongation at break.

The invention relates to a preparation method of a clay mud inhibitor, as well as a product and application thereof. The preparation method comprises the following steps of (1) heating maleated rosin,premixing the maleated rosin and polyethylene glycol, and carrying out esterification reaction to obtain an intermediate product; (2) adding anhydrous sodium carbonate into the intermediate product obtained in the step (1), continuously reacting, and obtaining the clay mud inhibitor. Since the long and widespread problem that a concrete aggregate contains mud so as to influence the concrete quality exists, the invention provides a new solution, the clay mud inhibitor obtained through the preparation method provided by the invention is a modified abietic acid polycarboxylic acid mud inhibitor,and the clay mud inhibitor is regulated to have a specific molecular weight and a structure through the preparation method, so that the sensitivity of a low polycarboxylic acid water reducing agent on a clay is effectively reduced. When the mud content of the aggregate is higher, the mud inhibitor can inhibit the aggregate from adsorbing the water reducing agent, so that the adverse effects of big additive dosage fluctuation, reduced concrete strength, instable quality, difficulty in construction and the like caused by the reason that the aggregate contains the mud can be effectively overcome, the construction quality safety is further improved, and the clay mud inhibitor has a larger application value.

The invention belongs to the technical field of polymer synthesis, and in particular relates to polyester-polyether polyol for a microporous PU (polyurethane) shoe sole and a preparation method of the polyester-polyether polyol as well as a PU shoe sole stock solution prepared from the polyester-polyether polyol and a preparation method of the PU shoe sole stock solution. The polyester-polyether polyol for the microporous PU (polyurethane) shoe sole is a copolymer of epoxypropane and ethylene oxide by taking aromatic polyester polyol as an initiator, and a hydroxyl value is 48 to 112mg KOH / g; the epoxypropane in a molecular chain accounts for 50 to 75wt percent, and the ethylene oxide accounts for 10 to 20wt percent. The polyester-polyether polyol provided by the invention is low in viscosity, high in end group activity, and narrow in molecular weight distribution, has the characteristics of being wide in formula process tolerance and good in dimensional stability in the preparation of microporous elastomeric materials, and has the characteristics of good mechanical properties such as high tear strength, high tensile strength, and high stretch rate of the polyester shoe sole stock solution and the properties of low viscosity and hydrolysis resistance of a polyether shoe sole stock solution, and the very good application value is achieved.

The invention belongs to the technical field of circuit design, and discloses a low-leakage current gating switch circuit for multi-path resistance high-precision measurement, which comprises diodes D1-D7, a triode Q3, MOS (Metal Oxide Semiconductor) transistors Q1, Q4, Q5 and Q6, and operational amplifiers U1 and U2, a standard current input end is grounded after passing through a diode D1, an MOS tube Q1, a source electrode of the MOS tube Q1, a diode D3 and a resistor R4 to be measured, the diode D3 is further connected with an ADC sampling end through MOS tubes Q5, Q4 and Q6, a positive end of an operational amplifier U2 is connected with the standard current input end, a negative end of the operational amplifier U2 is connected with an output end, and the negative end of the operational amplifier U2 is further connected with the MOS tube Q1 through a diode D7 and a diode D2. The positive end of the operational amplifier U1 is connected with the ADC sampling end, the negative end of the operational amplifier U1 is connected with the output end, the output end of the operational amplifier U1 is connected with the diode D2 through the diode D6, and the output end of the operational amplifier U1 is further connected with the source electrode of the MOS tube Q6 through the diode D4. According to the invention, the overall leakage current of the circuit can be reduced to picoampere level, and the measurement precision is greatly improved.

The invention discloses a VOCs treatment method and a device thereof, and relates to the field of regeneration of activated carbon or zeolite that has adsorbed VOCs. The treatment device includes a VOCs gas treatment interface connected to an adsorption tower, a treatment gas pipeline, a catalytic combustion reactor, a purification Pipeline, induced draft fan, flue gas regulating valve, mixer, clean flue gas interface for connecting with the adsorption tower and providing clean flue gas for the adsorption tower, liquefied gas storage device, gas burner, air intake for connecting with the atmosphere Ducts, clean flue gas discharge ducts, blowers for feeding air into the clean ducts. By adjusting the technological process, the inventor solved the contradiction between the high pressure of the gas combustion chamber and the low pressure of the combustion fan of the gas burner under the premise of realizing the normal operation of the catalytic combustion reactor and the gas burner. At the same time, under the premise of changing the process flow, through the innovation of the structure, the secondary impact brought by the overheated air flow is solved, and the stable, reliable and efficient operation of the device is guaranteed.