128results about How to "Good for maintaining stability" patented technology

The invention discloses a silicon-based negative electrode plate, a fabrication method thereof and a lithium ion battery. A negative coating layer of the silicon-based negative electrode provided by the invention comprises a first coating layer and a second coating layer, wherein the first coating layer is arranged on a current collector, the second coating layer is arranged on the first coating layer, an active substance in the first coating layer comprises a silicon-based negative electrode material, an active substance in the second coating layer does not comprise a silicon-based negative electrode material, and lithium is contained in a surface of the second coating layer. The fabrication method comprises the steps of 1) coating first paste comprising the silicon-based negative electrode material on the current collector to form the first coating layer; 2) coating second paste which does not contain the silicon-based negative electrode material on the first coating layer to form the second coating layer; and 3) performing lithium doping on a pole plate comprising the second coating layer in advance to obtain the silicon-based negative electrode plate. With the silicon-based negative electrode plate provided by the invention, direct contact of the silicon-based material and metal lithium is prevented during the lithium doping process of the pole plate comprising the silicon-based negative electrode material in advance, and the energy density and the cycle stability are remarkably improved.

The invention discloses a preparation method of a silicon/carbon composite material applied to high-performance lithium ion battery anodes. The preparation method comprises the following steps: adding silicon nanoparticles into a mixed solvent, carrying out ultrasonic treatment, dropwise adding hydrosol containing graphene oxide, finally adding a fluoride solution, then carrying out ultrasonic treatment, then adding the materials into a pyrolytic carbon source solution for reacting, carrying out carbonization and acid treatment under the inert atmosphere and washing till the solution is neutral to obtain the silicon/carbon composite material applied to high-performance lithium ion battery anodes. The silicon/carbon composite material prepared by the method has the advantages of high capacity and long cycle life.

The invention provides an electrolyte. The electrolyte comprises vanadium ions, sulfuric acid, and an azine compound which is adopted as an additive, wherein the mass concentration of the additive in the electrolyte is 0.01-5.0%. The invention also provides a preparation method of the electrolyte. The addition of the additive allows the oxidation reduction reaction reversibility of effective substances in the electrolyte to be improved, and is in favor of maintaining the stability of the vanadium electrolyte in the charging and discharging operation of a battery.

The invention relates to a method for chemically synthesizing acetic acid by using methanol low pressure carbonyl and a device thereof, belonging to the technical field of chemical engineering. The method comprises: methanol and carbon monoxide firstly react in a reactor filled with reaction liquid to generate the acetic acid, and then the reaction liquid enters a multifunctional tower to be processed by flash evaporation and lightness removal to lead overhead fraction of the multifunctional tower to enter a condenser, so that part of light phase in the condensate liquid flows and returns to a lightness removing section of the multifunctional tower, and heavy phase returns to the reactor to continuously take part in the reaction. The method combines the functions of the existing evaporator and lightness removing tower into the multifunctional tower, so as to simplify the flow route of acetic acid preparation, shorten the returning route of catalyst, be beneficial to maintaining the stable property of the catalyst and reducing the loss of the catalyst; the existing evaporator and lightness removing tower are combined into a whole, so that the equipment investment is reduced and the difficulty of operation and control can be lowered.

The invention discloses a copper-based powder metallurgy brake pad material as well as a preparation method and application thereof. The copper-based powder metallurgy brake pad material is prepared from the following raw materials in percentage by weight: 54 weight percent to 67 weight percent of copper powder, 13 weight percent of graphite, 4 weight percent to 17 weight percent of iron powder, 8weight percent to 14 weight percent of a ferrochrome alloy, 1 weight percent to 4 weight percent of silicon carbide and 1 weight percent to 4 weight percent of silicon dioxide; the preparation methodof the copper-based powder metallurgy brake pad material comprises the following steps: 1) weighing the raw materials according to the ratio and putting the raw materials into a mixer and uniformly mixing; 2) filling the mixed raw materials into a mold; carrying out hot pressing sintering or spark plasma sintering under the protection of a vacuum atmosphere or nitrogen gas to obtain the brake padmaterial with excellent comprehensive performance. The prepared brake pad material has high density and rigidity, stable friction coefficient, abrasion resistance and excellent comprehensive performance, and can meet the requirements on braking friction plates of high-speed rail trains. The copper-based powder metallurgy brake pad material disclosed by the invention can be used for preparing a brake pad; the preparation method comprises the following steps: taking Q235 as a base material, and compounding and sintering the raw materials for preparing the copper-based powder metallurgy brake pad material and the base material through a hot pressing sintering technology, so as to obtain the brake pad.

The invention discloses a novel subgrade structure for preventing road frost boiling in a cold area. The structure is formed by waterproof geotextile, a broken stone layer, permeable geotextile and subgrade embankment, wherein after paving the subgrade embankment formed by coarse grained soil on a compacted natural ground surface, the waterproof geotextile is paved; then the broken stone layer is paved on the waterproof geotextile; and after the permeable geotextile is paved on the top of the broken stone layer, the subgrade embankment is paved. In the structure, water generated when the subgrade embankment is melted enters the broken stone layer in a subgrade by utilizing the permeable geotextile and is discharged from the two sides of the subgrade through the broken stone layer; and the frozen depth of frozen earth is reduced by utilizing a heat insulation effect of the broken stone layer so as to reduce the water migrated into the subgrade from the lower part of the subgrade in a freezing process. The waterproof geotextile can not only prevent the water in the lower part from migrating into the upper part of the subgrade, but also prevent the water in the upper part of the subgrade from permeating into the lower part of the subgrade. The subgrade structure can effectively reduce the water content of the subgrade embankment and prevent road frost boiling disease in the cold area, so as to ensure high-quality operation of a road in the cold area.

The invention provides a device and a method for treating low-C/N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation and belongs to the technical field of biological sewage treatment. The device provided by the invention comprises a raw water tank, a pre-positioned short-range denitrification reactor, an intermediate water tank and an anaerobic ammonia oxidation reactor. The method comprises the following steps: firstly, enabling the municipal sewage to enter the pre-positioned short-range denitrification reactor and carrying out short-range denitrification by utilizing organic matters in domestic sewage and nitric nitrogen which is remained on the last period; secondly, enabling the sewage into an anaerobic ammonia oxidation reactor and carrying out autotrophic nitrogen removal; meanwhile, draining water from the pre-positioned short-range denitrification reactor and carrying out aerobic aeration to generate the nitric nitrogen. According to the device and the method, provided by the invention, a carbon source in domestic sewage can be sufficiently utilized for carrying out the short-range denitrification and the ratio of an anaerobic ammonia oxidation substrate is controlled through a water draining ratio, so that energy sources are saved; the device and the method are easy to control and high in stability, and an effective way is provided for application of a mainstream anaerobic ammonia oxidation technology and deep denitrification of the low-C/N municipal sewage.

The invention discloses a mercury ion photo-electrochemical sensor working electrode and a manufacturing method and an application thereof, and belongs to the technical field of chemical analysis detection. The manufacturing method of the photo-electrochemical sensor working electrode comprises the following steps: performing hydro-thermal synthesis on titanium dioxide nanowires on FTO conductive glass to form amination titanium dioxide nanowires; coupling photosensitive molecules with the amination titanium dioxide nanowires through chemical bonding to obtain the working electrode. The sensor working electrode has the advantages of high selectivity and high sensitivity to mercury ions, the response speed is high, the response range is 0.5nmol.L<-1>-50mumol.L<-1>, and the detection limit is up to 0.15nmol.L<-1>. Accurate control on mercury ion recognition by a mercury ion photo-electrochemical sensor is enhanced, a stable photosensitive dye molecular structure contributes to keeping of sensor stability, and the working electrode has a good development prospect.

The invention discloses a self-packaging method of a sheet-shaped flexible piezoresistive sensor. The self-packaging method of a sheet-shaped flexible piezoresistive sensor includes the steps: arranging two packaging material films up and down in a clamped manner to form a sandwich structure, installing the sandwich structure into a die, filling the die with packaging material liquid, after solidification, and finally realizing self-packaging after removing the die, wherein the young modulus of the packaging material is consistent with the flexible piezoresistive sensor. The self-packaging method of a sheet-shaped flexible piezoresistive sensor can realize a self-packaging sealing structure of the flexible piezoresistive sensor under assistance of the die. The self-packaging sealing structure isolates the sensitive material of the sensor from the external environment, such as contacting air, moisture and the like, thus greatly widening the application scene of the piezoresistive sensorto some harsh environments, such as water and even tissue fluid, being conductive to maintenance of stability of performance, and effectively prolonging the service life of the piezoresistive sensorat the same time. The self-packaging method of a sheet-shaped flexible piezoresistive sensor has the advantages of being novel and simple, being low in cost, being significant in effect, being excellent in performance, and having great potential and advantage for the clinic medical field.

The invention relates to a living cell product preservation solution and preparation and using methods thereof. The living cell product preservation solution is prepared from catechinic acid, glucose, human serum albumin, sodium bicarbonate and preservation base fluid. The preservation base fluid is composed of a 0.9% sodium chloride solution and a compound electrolyte solution. The catechinic acid, the glucose, the human serum albumin and the sodium bicarbonate are added into the preservation base fluid, a 0.22-micrometer filter film is used for filtration sterilization, and the living cell product preservation solution is obtained. Living cell product preservation solution resuspension cells are used, the cell concentration is 0.5*10<7>-5*10<7> cells/ml, and normal temperature preservation is carried out for 0-72 h. The living cell product preservation solution can be used for preserving living cells for a long time, and living cells still have high activity and motility rate after being preserved through the preservation solution for 72 h. The living cell product preservation solution can preserve living cells at normal temperature.

The invention discloses a wet tissue for relieving hemorrhoid symptoms. The wet tissue consists of a conditioning liquid and non-woven fabric bearing the conditioning liquid, wherein the conditioning liquid is prepared from components in parts by weight as follows: 30-60 parts of a witch hazel extracting solution, 0.05-0.1 parts of glucose chlorhexidine, 0.01-0.05 parts of borneol, 2-5 parts of dealdehyding alcohol, 2-8 parts of propylene glycol, 0.3-1 part of a preservative, 0.05-0.3 parts of a pH regulator and 26-66 parts of deionized water. The wet tissue can effectively relieve the hemorrhoid symptoms, perform sterilization, disinfection and detumescence, reduce exudation and promote wound healing, is mild and safe, has no side or toxic effects and is convenient to use. The invention further discloses a preparation method of the wet tissue for relieving the hemorrhoid symptoms. The preparation method adopts a simple process and is convenient to operate, high in security coefficient, operability and efficiency and low in cost.

The invention discloses a PUF eigenvalue generation method and a device with PUF. The PUF eigenvalue generation method comprises the steps of providing the device, wherein the device comprises N voltage nodes, N is a positive integer, and voltage values of the N voltage nodes are changed along with the change of technological factors; detecting the voltage values of the N voltage nodes to determine detection results of the voltage nodes; and generating a PUF eigenvalue according to the detection results of the N voltage nodes. By the adoption of the technical scheme, the device has relativelyhigh invisibility when the PUF eigenvalue is generated.

The invention discloses an aerogel particle-carbon dioxide-water-based three-phase foam system for an oil field, and application thereof. The three-phase foam system is prepared from carbon dioxide, aliquid phase and aerogel particles, wherein the liquid phase is an aqueous solution of a foaming agent, a foam enhancer and an inorganic salt aid. According to the invention, the three-phase foam system can uniformly and stably carry aerogel particles with oleophylic and hydrophobic characteristics, so that the aerogel particles are brought into a reservoir, the aerogel particles are uniformly dispersed in the reservoir, a selective plugging effect of plugging water but not plugging oil in a dominant channel in the reservoir is achieved, the water-based carbon dioxide foam oil displacement efficiency and sweep efficiency are enhanced, the purposes of long-period oil stabilization and water control are achieved, and the recovery ratio can be increased; and the addition of the foam enhanceris beneficial to maintaining the overall stability of a three-phase foam system, promotes aerogel particles to be uniformly and stably dispersed in the foam system for a long time, has the characteristics of greenness, no toxicity and no pollution, and is beneficial to promoting the green development of a high-water-content old oil field.

The invention provides an A<2>/O denitrifying phosphorus removal device and method for bi-granule sludge improvement and belongs to the field of biological sewage treatment. The A<2>/O denitrifying phosphorus removal device mainly comprises a raw water tank, an A<2>/O reaction tank, an intermediate sedimentation tank, an aeration tank, a secondary sedimentation tank and a nitrification liquor storage tank which are sequentially connected, wherein an anaerobic zone of the A<2>/O reaction tank is used for anaerobic phosphorus release reaction and connected with the intermediate sedimentation tank through a first sludge reflux pump, and an anoxic zone is used for denitrifying phosphorus removal and connected with the nitrification liquor storage tank through a nitrification liquor reflux pump; the aeration tank finishes oxidation of ammonia nitrogen, provides an electron acceptor for denitrifying phosphorus removal and is connected with the secondary sedimentation tank through a second sludge reflux pump. According to the A<2>/O denitrifying phosphorus removal device and method, denitrifying phosphorus removing bacteria and nitrifying bacteria are separated, the advantages of a two-sludge system and granule sludge are given into full play, and the advantages of carbon source conservation, excellent sludge settleability, high denitrification and phosphorous removal efficiency, strong resistance to impact load, stable effluent quality and the like.

The invention discloses an intelligent river channel flow velocity measuring device and measuring method. The device comprises a main body used for supporting and installing the measuring device; a water flow direction sensing mechanism, used for obtaining the direction of water flow; a rotatable speedometer, used for adjusting the direction according to the direction of the water flow obtained by the water flow direction sensing mechanism, so that a flow measuring propeller of the rotatable speedometer is aligned to the flow velocity direction of the water flow, and the flow velocity at the position is measured; a traction mechanism, used for adjusting the depths of the water flow direction sensing mechanism and the rotatable speedometer underwater; and a PLC, connected with the water flow direction sensing mechanism, the rotatable speedometer and the traction mechanism. According to the water flow direction sensing mechanism, the direction of water flow thrust can be obtained by measuring the magnitude and direction of force borne by the rod on the swing ball, the speed measuring instrument can be rotated to adjust the direction of the flow measuring propeller according to the water flow direction, and therefore the measured flow speed is more accurate; and the device can measure the flow velocities of water flows in different depths of the river channel.

The invention provides a multistage fermentation device containing a fermentation liquor reflux and denitrification system, and belongs to the technical field of biomass resource recovery. The device comprises a feeding system, a multistage fermentation system, a biogas residue treatment system, a solid-liquid separation system, a fermentation liquor denitrification system, a biogas liquid reflux system, biogas liquid and biogas residue pipelines, pumps, valves and flowmeters. The feeding system comprises a biomass pretreatment device and a mixed feeding device; the multistage fermentation system is formed by multiple fermentation tanks which are connected in series or in parallel; the fermentation liquor denitrification system is composed of a reactor, an aeration device with replaceable steel mesh, a stirring device, a water quality regulating device and a struvite recovery tank; the biogas liquid reflux system is composed of the biogas liquid pipeline, the pump, the valve and the flowmeter. The multistage fermentation device containing the fermentation liquor reflux and denitrification system has the advantages of being capable of cycling struvite crystals, effectively reducing ammonia nitrogen concentration in reflux fermentation liquid, relieving the fermentation system ammonia inhibition effect and improving the fermentation system performance and capable of being applied to anaerobic fermentation of biomass.

The invention relates to a manufacturing process of a soiled fabric, in particular to a manufacturing process of a standard carbon black soiled fabric used for performance testing of a washing machine. In the manufacturing process of the carbon black soiled fabric, water is used as a production solvent for preparing a contaminating fluid and is safe, environmentally friendly and low in cost; an full-automatic continuous rolling, suction, drawing and setting machine is adopted for printing and dyeing, manual intervention during printing and dyeing is reduced by controlling the pressure of a lathe, the drying temperature of a dryer, the air volume of a fan, the chain speed rate and the like, and the automation degree is high. The reflectivity of the four points on both sides of the standard carbon black soiled fabric prepared by means of the process is from 22% to 28%, and the yield rate can reach 95% or above.

The invention relates to the technical field of medicine, and relates to a Chuanxiong volatile oil drop pill for treating cardiovascular and cerebrovascular diseases such as cerebral thrombosis, cerebral embolism, transient cerebral ischemia, coronary heart disease, hypertension, arteriosclerosis, and vascular vertigo. The invention adopts a steam distillation method or a subcritical fluid extraction method to prepare chuanxiong volatile oil, and fully removes water in the chuanxiong volatile oil; mixes the chuanxiong volatile oil with polyethylene glycol matrix, and adopts a dropping pill machine to produce chuanxiong volatile oil drop pills. The Chuanxiong volatile oil dripping pill prepared by the present invention does not contain water, so the Chuanxiong volatile oil is stable. Compared with the Chuanxiong volatile oil injection or oral liquid, it has good stability, high bioavailability, and is easy to store. It can effectively improve the effect of Chuanxiong volatile oil on ischemic brain. Efficacy of vascular disease.

The invention relates to the technical field of automatic equipment, in particular to an automatic discharging and overturning system and a box assembling system. The automatic discharging and overturning system comprises a machine frame, a discharging device and a lifting mechanism, wherein the discharging device and the lifting mechanism are arranged on the machine frame; the lower end of the lifting mechanism is connected with an overturning device, and the overturning device is arranged right above the discharging device and comprises a clamping mechanism and a rotating mechanism; and the rotating mechanism is connected to the clamping mechanism and is used for driving the clamping mechanism to turn over. According to the automatic discharging and overturning system and the box assembling system, in the operation process, a product to be overturned is placed on the discharging device, the lifting mechanism descends in place, the clamping mechanism extends out and clamps the product, the rotating mechanism drives the clamping mechanism to rotate so as to overturn the product, the structure is simple and compact, and therefore the equipment cost and space can be saved; and the operation is simple and convenient, the control is convenient, the automation degree is high, the automatic and continuous function can be favorably achieved, in addition, the stability of maintaining the product quality can be facilitated, the automatic discharging and overturning system and the box assembling system can be widely applied to automatic dispensing on a production line and discharging of other industries, and the practicability is high.

The invention discloses flavored sauce and a preparation method thereof. The flavored sauce is prepared through fermentation with, by weight, 50-60 parts of bottom ingredients, 50-60 parts of tomatoes, 10-15 parts of salt, 1-2 parts of sweetening agents, 1-2 parts of white spirits, 10-15 parts of fresh ginger, 4-8 parts of garlic and 1-4 parts of leavening agents. Peppers and wild pepper slag from which flavored substances are extracted serve as the bottom ingredients, the tomatoes are compounded for fermentation, the prepared fermented sauce is full in flavor and full of nutrition, the pH value of a product ranges from 3.0-4.5, and the content of amino acid ranges from 10.5 mg/mL to 15.2 mg/mL.

The invention discloses a preparation method of an animal decellularized lung biological scaffold material, and belongs to the field of tissue engineering and regenerative medicine. According to a traditional decellularized lung biological scaffold material, cells are removed by pouring a detergent, extracellular matrix (ECM) can be damaged while the detergent removes the cells, and then the scaffold structure is affected. According to the method disclosed by the invention, the ECM protective agents such as a dextrose solution are creatively used for filling the trachea, so that the damage ofthe detergent to the ECM is reduced, the contradiction between ECM retention and cell component removal is more easily balanced, and a stent material with more thorough cell removal and more intact ECM is obtained.

The invention discloses a method for intensifying reduction of sulfonamide antibiotics in soil by earthworm intestinal contents. The method comprises the following steps: selecting mature fresh earthworms with obvious clitella, cleaning the body surfaces of the earthworms, performing gut purge in a culture dish, adding the earthworms into artificially prepared sulfanilamide contaminated soil in proportion, culturing for 2 weeks in a dark place at room temperature, taking out the earthworms, cleaning the body surfaces of the earthworms again and dissecting the earthworms to obtain fresh earthworm intestinal contents; collecting different types of soil polluted by sulfonamide antibiotics in the natural environment, removing grass roots, leaves, stones and other impurities in the soil, and crushing and screening the soil; then adding the earthworm intestinal contents into the soil polluted by different sulfonamide antibiotics in proportion, and carrying out artificial culture for 1-2 months to complete remediation. The earthworm intestinal contents contain high-abundance sulfonamide antibiotic degrading flora, and the exogenously added intestinal contents not only have a remarkable effect of degrading and removing sulfonamide antibiotics in soil, but also are beneficial to rapid recovery of the ecological functional diversity of indigenous microorganisms after restoration.