61results about How to "The operation process is easy to control" patented technology

The invention relates to an application of a femto-second laser in the treatment of titanium or titanium alloy implanting material surface, belonging to the technical field of application of laser in the material surface treatment, which comprises the following steps: in the air, the femto-second laser pulses are arranged over the massive titanium or titanium alloy materials, are vertically focused on the surface to form a focal point, the laser spot radius of which is 5 Mum, the processing parameters of the femto-second laser are: the PRF is 1 kHz, the single pulse energy is 50 to 300 micro-joules, the pulse width is 50 femto-seconds, the pulse center wavelength is 800 nm, the laser processing line spacing is 10 to 100 Mum, and the laser scanning speed is 0.2 to 1.0mm/s; the polarization direction of the femto-second laser is adjusted to be parallel with the scanning direction of the femto-second laser, the femto-second laser is used to scan the entire surface of the massive titanium or titanium alloy materials which have been immersed in hydroxyl apatite suspension liquid for 5 minutes, so the surface of the titanium or titanium alloy materials present uniform rough peak-like protrusions and a pattern of porous cyclist regular structure, and is loaded with the titanium-based biomedical material of calcium and phosphate salt.

The invention discloses a heavy metal biological adsorbent using an eggshell membrane as a matrix and a preparation method thereof. The heavy metal biological adsorbent adopts chitosan as an immobilized carrier and eggshell membrane powder as a basis material, and comprises the following components in part by weight: 10 to 13 parts of the eggshell membrane powder, 20 to 30 parts of the chitosan of which the deacetylation degree is 86.9 percent, and a minute amount of gelatinous substance of a complex which contains sodium and potassium and is formed in the preparation process. The particle size of the biological adsorbent is 2 to 3 millimeters. The method comprises the steps of performing vacuum freeze drying and mechanical disintegration on a fresh eggshell membrane (a fibrous membrane between an eggshell and egg white), and then embedding the eggshell membrane with chitosan glue solution to obtain the biological adsorbent for adsorbing heavy metals. The biological adsorbent can be used for treating waste water containing the heavy metals of nickel, cobalt, cadmium, copper, lead and the like of which the concentration is lower than 100 mg/L, and the adsorption rate achieves 42 to 98 percent.

The invention relates to a method for producing a kvass beverage by using germinating brown rice, belongs to the technical field of beverage preparations, and specifically relates to a fermentation type kvass beverage adopting germinating brown rice as a raw material. The method comprises: crushing germinating brown rice; screening with a 20 mesh sieve; adding water to the germinating brown rice powder according to a ratio of 4:1; carrying out saccharification for 5-6 h at a temperature of 60-65 DEG C; carrying out coarse filtration on the saccharification solution by using 4-6 layers of gauze; diluting the filtrate into 5 Bx; boiling for 15-20 min, and adding 0.1% of hop during boiling; cooling to a temperature of 40 DEG C after completing the boiling; adding 0.01% of Lactobacillus bulgaricus lyophilized powder; carrying out pre-fermentation for 8-10 h at a temperature of 40-42 DEG C; cooling to a temperature of 16 DEG C; adding 0.1% of bread activity dry yeast; carrying out post-fermentation for 20-24 h at a temperature of 15-16 DEG C; and carrying out filtration, sterilization, and low temperature pressure holding filling to obtain the finished product. The kvass beverage of the present invention maintains taste and aroma of kvass beverages, and further has a plurality of health functions.

The present invention discloses a chemical nickel bath that is composed of solvable nickel salt, complexing agent, buffer, pH regulator of alkali metal hydroxide, and stabilizer. The operation temperature of the bath is 50-55DEG C, and the pH value is 7.0-8.5. This invention is a mesothermal alkali chemical nickel plating process that has low energy consumption and stable bath. Furthermore, the pH value is nearly neural and not regulated by ammonia, which saves the cost and improves the work condition.

The invention discloses a manufacturing method of a flexible-rigid board. The method comprises the steps that 1, a flexible board is manufactured, wherein a flexible board area is formed through base material feeding, graphic transfer, etching and demolding, brownification treatment is carried out on the flexible board area, a cover film is pasted on the flexible board area after treatment, the cover film is laminated to form a primary flexible board body, surface treatment and secondary brownification treatment are carried out on the primary flexible board body, and the flexible board is formed; 2, a pasting piece is manufactured, wherein a primary pasting piece body is formed through base material feeding and drilling, an uncovered area of the primary pasting piece body is windowed, and the pasting piece is formed; 3, a rigid board is manufactured, wherein a rigid board area is formed through base material feeding, drilling and graphic transfer, rigid board parts of copper-clad board areas are assembled together through the pasting piece, assembled copper-clad boards are pressed together to form a primary rigid board body, an uncovered area of the primary rigid board body is windowed, the rigid board is formed, and the windowing structure of the rigid board is identical to that of the pasting piece; 4, assembling is carried out, wherein the windowed rigid board, the pasting piece and the flexible board are assembled together in sequence.

The invention belongs to the technical field of phenolic resin synthesis, and discloses a method for synthesizing phenolic resins by using paraformaldehyde. The method comprises the following steps: opening a reaction kettle stirring mechanism, pumping preheated phenol into a reaction kettle in a reduced pressure state, then pumping recycled phenol containing wastewater into the reaction kettle and carrying out vacuum removal on the reaction kettle, and putting paraformaldehyde into the reaction kettle to uniformly heat at normal pressure so as to heat the obtained mixture to be boiled; after the boiling reaction is completed, cooling the obtained mixture, and adding an oxalic acid solution into the reaction kettle; after the obtained mixture is heated to be boiled and the pressure-reduced dehydration temperature rises to 150 DEG C, carrying out slow vacuum enrichment and then emptying on the obtained product so as to obtain phenolic resins, wherein the proportion of macromolecular weights of the phenolic resins is less than 6%, and the proportion of middle molecular weights of the phenolic resins is more than 80%. The phenolic resins prepared by using the method disclosed by the invention have high fluidity, and have a higher bonding strength when being taken as a binder under the condition that the resin adding amount is less.

The invention discloses a preparation method for vinorelbine tartrate; the preparation method comprises the following steps of: taking tartrate vinblastine as a starting material; using ammonia water for dissociating the starting material, reacting the dissociated starting material with the metachloroperbenzoic acid so as to obtain vinblastine-N oxide, then reacting the vinblastine-N oxide with vindoline and trifluoroacetic anhydride, carrying out the reduction through sodium borohydride so as to obtain dehydrated vinorelbine, treating the dehydrated vinorelbine so as to obtain vinorelbine, and finally salifying the vinorelbine with tartaric acid so as to obtain the vinorelbine tartrate. The preparation method has the advantages of low cost, few side reaction, easily controlled operation process, higher yield and product purity and wide industrialized application prospect.

The invention discloses a high-voltage lithium cobalt positive electrode material and preparation method and application thereof. The high-voltage lithium cobalt positive electrode material comprisesan inner layer and a coating layer, wherein the inner layer is lithium cobalt particle core gradiently doped with nickel and aluminum, the doping content of the nickel in lithium cobalt particle is gradually reduced from inside to outside, the doping content of the aluminum in the lithium cobalt particle is gradually increased from inside to outside, the coating layer is a lithium cobalt compositeoxide containing M' element, and M' is selected from one or more of Ni, Mn, Al, Ti, Y, Zr, La, P, Nb, Sb and Ce. Meanwhile, the preparation method and application thereof of the high-voltage lithiumcobalt positive electrode material is also provided. The lithium cobalt material has better structure stability under a high voltage, higher discharging specific capacity and excellent cycle property.The preparation method and process of the lithium cobalt material is simple, and the operation process is controllable.

The invention discloses an impurity removal and purification system and method for white wine, mainly solving the problem of poor impurity removal effect of the prior art. The system and method have the implementation scheme that: 1. a wine pot is put in a glass room so that the wine in the pot is heated under sun exposure to 30-50 DEG C; 2. air is pumped into the wine with an air pump so that substances with boiling points below 70 DEG C is volatilized by air from the wine, simultaneously, substances with boiling points above 70 DEG C are inevitably carried and volatilized, the volatilized gas is delivered to a condensing device via a pipe and condenses into liquid to be recycled; 3. the recycled liquid is delivered into a vacuum distillation separation device, harmful substances with low boiling points below 70 DEG C are volatilized, beneficial substances with boiling points above 70 DEG C are reserved in the liquid; and 4. the liquid containing the beneficial substances is taken out and returned to the wine pot. The system and method improve the fragrance and purity of white wine by a dual impurity removal process, can be used for reducing harmful elements in the wine and avoid injury to a human body due to excessive drinking of wine.

The invention discloses a preparation method of xanthophyll nanometer emulsion, and relates to a preparation technology of the xanthophyll nanometer emulsion. Food grade sodium caseinate is selected as an emulsifying agent for emulsifying xanthophyll, and through high-speed shearing and high-pressure homogenizing, the xanthophyll nanometer emulsion is obtained. The average particle diameter of theprepared nanometer emulsion is 200-300nm, the nanometer emulsion is high in safety, the storage stability of the xanthophyll can be notable improved, and the chemical degradation of xanthophyll during storage can be reduced. According to the method, the particle diameter distribution is uniform and controllable, the technology is simple and easy to operate, and the repeatability is good; and theraw materials used for products are broad and easy to obtain, so that the xanthophyll nanometer emulsion is low in price, and the xanthophyll nanometer emulsion is high in safety, has certain nutrientvalue and biocompatibility and can be used for development of functional foods and health-care products.

The invention discloses a formula and preparation method of a pseudo high-entropy alloy coating. The method comprises the steps that elementary substance powder of seven types of elements, namely Fe,Co, Ni, Cr, Al, Ti and Si, is adopted as raw materials, and agglomeration and sintering are conducted, so that the powder grain size applicable to high velocity air fuel spraying is formed, wherein the atomic percent content of the Fe ranges from 5% to 15%, and the remaining atomic percents are equally divided by the remaining six types of elements; the Fe(P), Co, Ni, Cr, Al, Ti and Si pseudo high-entropy alloy coating is prepared through a method combining high velocity air fuel (HVAF) spraying and the laser cladding technology, wherein the Fe serves as the principal element, the content of the Fe, by atomic percentage, ranges from 40% to 60%, and the content sum of the remaining solute elements, by atomic percentage, is greater than or equal to 5% and less than or equal to 20%. The pseudo high-entropy alloy coating achieves good mechanical performance and is also excellent in corrosion resistance.

The invention relates to a cellulose fiber fabric cationic modification and salt-free alkali-free dyeing method. The method comprises following steps: adding soft water into a gas-liquid dyeing machine, adding cellulose fiber fabrics and a cationic modifier into the dyeing machine, starting the dyeing machine; adding sodium hydroxide into the dyeing machine from a material dissolving cylinder, adjusting the water level, running the dyeing machine, raising the temperature, discharging the modification liquid, washing the fabrics by a water solution of glacial acetic acid at a room temperature,taking out the fabrics, dehydrating the fabrics to obtain cation modified fabrics; adding soft water, adding cation modified cellulose fiber fabrics, dissolving active dyes, injecting the dyes into the dyeing machine, raising the temperature to the dyeing temperature, maintaining the temperature, discharging dyeing liquid, taking out the fabrics, and dehydrating and drying the fabrics. In the gas-liquid dyeing machine, cellulose fiber fabrics are modified under conditions: medium-low temperatures and a small bath ratio; the using amount of modifier is little; the surface and interior of fabrics are uniformly modified; the modified fabrics can be dyed without salt or alkali, furthermore, the dyeing time is short, the dyeing process is simple and controllable, the color is uniform and bright, and the color fastness meets the standards.

The invention relates to the technical field of electrical connectors, and concretely relates to a military electrical connector insulator and a preparation method thereof. A material for the insulator for a motor mounting seat comprises, by weight, 90-110 parts of PBT, 10-20 parts of phenolic resin, 10-15 parts of polytetrafluoroethylene, 6-12 parts of hollow glass beads, 15-20 parts of alkali-free glass fibers, 9-14 parts of a composite toughening agent, 15-20 parts of a composite flame retardant, 2-6 parts of a compatibilizer, 1-2 parts of a lubricant, 2-4 parts of a silane coupling agent,2-3 parts of an antioxidant and 5-10 parts of an inorganic filler. The military electrical connector insulator prepared in the invention has the advantages of excellent mechanical properties, good wear resistance, good heat resistance, good flame retardation property, excellent use safety and reliability, high dimensional accuracy and long service life. The preparation method of the military electrical connector insulator has the advantages of simplicity, high efficiency, easiness in control of the operation process, facilitation of industrial production, and stable product quality.

The invention provides a preparation method of silver tin oxide electric contact materials. Firstly, a method for preparing a solution is adopted, an aqueous solution containing silver nitrate and tin nitrate reacts with a sodium carbonate aqueous solution containing a sodium hexametaphosphate dispersing agent, a mixture containing silver carbonate and tine carbonate is obtained under the action of high-speed stirring and the sodium hexametaphosphate dispersing agent, silver tin oxide compound powder with fine particles is obtained through the processing of filtering, forging and mechanical grinding, the preparation of the silver tin oxide electric contact materials uniform in component in the subsequence powder metallurgy process is facilitated, and the preparing process is environmentally friendly. The preparation method of the silver tin oxide electric contact materials is simple and easy to control, short in production cycle, low in pollution, low in cost and favorable for industrial production.

The invention discloses a preparation method of high-viscosity poly(butylene succinate)/polylactic acid composite material. The high-viscosity poly(butylene succinate)/polylactic acid composite material is prepared from the following ingredients of 70 to 90 parts of PBS resin, 10 to 30 parts of PLA resin, 0.5 to 2 parts of crosslinking agent and 2 to 20 parts of auxiliary crosslinking agent. According to the preparation method disclosed by the invention, mechanical properties of yield strength, impact strength and the like of the poly(butylene succinate)/polylactic acid composite material canbe adjusted by adjusting a proportion of PBS resin/PLA resin; the viscosity of the poly(butylene succinate)/polylactic acid composite material can be regulated by adjusting a proportion of the crosslinking agent/the auxiliary crosslinking agent; the tackified poly(butylene succinate)/polylactic acid composite material has the advantages of good mechanical property, high viscosity and biodegradable. The preparation method disclosed by the invention solves the problem that as the PBS resin and the PLA resin have low melt viscosity, the PBS resin and the PLA resin cannot be applied to the fieldsof blow molding, foaming, thermal forming and the like; the poly(butylene succinate)/polylactic acid composite material can replace existing materials of polyolefin, polystyrene and the like to be applied to the fields of blow molding, foaming, thermal forming and the like in the future and has a wide application prospect.

According to a falling ball type rebound modulus tester, a portal frame serves as a supporting body, a linear stepping motor is installed in the center of a transverse bar of the portal frame, a driver and the linear stepping motor are connected and installed on the transverse bar, and a programmable logic controller is installed on a supporting piece at one side of the portal frame and connectedwith the driver, a first electromagnet and a second electromagnet. The first electromagnet is connected to the lower end of the linear stepping motor arm through a flexible connecting rope, the secondelectromagnet is fixed to the upper end of a flange handle of the falling ball type rebound modulus tester, and the acceleration sensor is installed at the connecting position of the flange handle and a spherical crown body; and a time difference measurer is arranged at the bottom of the spherical crown body. The tester is simple in structure, easy to install and low in cost when applied to work;and mechanical automatic measurement is realized, the measurement precision is high, and the working efficiency is improved.

The invention relates to an electric field coating process of an ultrafiltration membrane. The electric field coating process of the ultrafiltration membrane belongs to the technical field of water treatment membrane preparation, and comprises the steps of placing coating liquid containing negative charge TiO2 in a coating pond; immersing an ultrafiltration membrane component and a stainless steel plate electrode in the coating liquid; respectively connecting the ultrafiltration membrane component and the stainless steel plate electrode to positive and negative electrodes of a direct-current power supply; carrying out electric field coating under the electric field intensity being 30V/cm to obtain a coating modified ultrafiltration membrane with a TiO2 granular layer on the ultrafiltration membrane surface based on the ultrafiltration membrane component. The prepared modified ultrafiltration membrane can separate a colloidand a macromolecular organic compound, playing a leading role on membrane pollution, from a membrane surface by depending on the functions of adsorption and interception of a precoated layer on a pollutant, so that the membrane pollution is greatly reduced. During backwashing, the pollutant falls off from the membrane surface along with the precoated layer, the backwashing resistance of the membrane is reduced, and a backwashing effect is improved.

The invention relates to a preparation method for halogen mixed with cadmium telluride, a thin film solar cell of halogen mixed with cadmium telluride and a preparation method of the thin film solar cell of halogen mixed with cadmium telluride. The preparation method for halogen mixed with cadmium telluride includes that 5 N cadmium and 5 N tellurium are weighted and placed in a reactor according to a first required mass ratio so as to obtain a mixture of cadmium and tellurium, and the first required mass ratio is a mass ratio between the 5 N cadmium and the 5 N tellurium. 4 N or more halogenated cadmium is added in the reactor according to a second required mass ratio, and the second required mass ratio is a mass ratio between the halogenated cadmium and the mixture of cadmium and tellurium. The reactor is vacuumized to a required vacuum degree and is sealed. The sealed reactor is placed in a heater, and warming treatment is carried out on the reactor. Cooling treatment is carried out on the sealed reactor which undergoes the warming treatment. The halogen mixed with cadmium telluride obtained through the preparation method for halogen mixed with cadmium telluride is adopted by the thin film solar cell of halogen mixed with cadmium telluride and the preparation method of the thin film solar cell of halogen mixed with cadmium telluride.

The invention relates to an engine air filter element cleaner. The engine air filter element cleaner is characterized in that the cleaner comprises a cleaner body, an upper cover is arranged on the cleaner body, a rack is arranged below the cleaner body, a control box is arranged on one side of the rack, and a meshed bearing disc is arranged in the cleaner body and provided with an air filter element; a driving device and a transmission device are also arranged in the rack; and an inner compressed air spray pipe, an outer compressed air spray pipe and an exhaust system are arranged on the two sides of the filter element cleaner.

The invention belongs to the field of analytical chemistry, and in particular relates to a determination method for interfacial photoelectron transfer and material photocatalysis activity, and a four-dimensional microscopy imaging analyzer. The four-dimensional microscopy imaging analyzer comprises a sample target, a laser, a slit, an extraction electrode, a hexapole, a quadrupole, a flying time mass analyzer, a detector and a device for supplying the sample target, slit, extraction electrode and hexapole with voltage. The determination method and four-dimensional microscopy imaging analyzer make use of the tunnel effect that a semiconductor material generates photoinduced electrons under laser illumination and the capture principle of electron acceptor molecules, determine the mass-to-charge ratio and ion signal of the interfacial transfer photoinduced electrons captured by the electron acceptor molecules or a product of photochemical reaction initiated by the interfacial transfer photoinduced electrons captured by the electron acceptor molecules, and obtain the microscopy imaging of a photocatalysis active spot through image reconstruction, thereby judging the photocatalysis active spot of the semiconductor material on the one hand, and judging the difficulty of the electron acceptor molecules in generating photochemical reaction and the product of photochemical reaction on the other hand.

The invention provides an atlantoaxial dislocation posterior repositor which comprises a fixed arm and a sliding arm in crossed connection. The fixed arm and the sliding arm are provided with verticalbends in the same height. A hook is arranged on the front section of the sliding arm, and the hook can slide front and back at the front end of the sliding arm through a sliding module in a controllable mode. A fixing module fixed to a centrum is arranged on the front portion of the fixed arm. An atlanto-axis is connected through the sliding arm and the fixed arm, an axis is fixed through the fixing module on the fixed arm, then the dislocated atlas is pulled back to be restored through the sliding module on the sliding arm, then fixing and bone grafting operation are conducted, and restoration of anterior dislocation of the atlanto-axis is realized from the posterior.

The invention relates to the technical field of biomedicine, and discloses a preparation method of a human amniotic stem cell culture. The preparation method comprises the following steps of: firstly, culturing separated and extracted human amniotic stem cells by using a human amniotic stem cell culture medium; and when the human amniotic stem cells are amplified to a cell confluence degree of 90%, replacing a serum-free culture medium to continuously culture the human amniotic stem cells for 48 hours; then collecting supernatant (namely the culture), and concentrating the supernatant by 10 times to obtain the human amniotic stem cell culture. The invention also discloses application. The invention discovers and proves that the human amniotic stem cell culture has the effects of whitening skin, brightening skin color and keeping the skin healthy and natural for the first time, has good prevention and treatment effects on melanin deposition caused by endocrine dyscrasia or chemical substance stimulation or physical method stimulation, is safe in components, does not have immunological rejection or tumorigenic effect, and does not have obvious toxic or side effect on a human body; the preparation method is simple, the operation process is controllable, and the preparation method has important industrialization value.

The invention relates to the technical field of agricultural internet-of-things, in particular to an agricultural internet-of-things experience system. The agricultural internet-of-things experience system comprises an experiencing machine and an agricultural internet-of-things plant planting device. The agricultural internet-of-things plant planting device comprises a base, and the base is provided with a pot body component, and a spraying component, a photo-thermal component and a picking component; the agricultural internet-of-things plant planting device further comprises a monitoring component, and the monitoring component is used for monitoring a plant growth environment and/or physiological factors in real time; the monitoring component, the spraying component, the photo-thermal component and the picking component are all in communication with the experiencing machine. The agricultural internet-of-things experience system is simple in structure, the operating process is simple and easy to control, a user more visually knows agricultural internet of things conveniently, which is beneficial to better knowing application of the internet of things in agricultural production by the user, and the user conveniently chooses a proper internet-of-things product.

The invention provides a method for preparing a conducting film on a substrate surface based on silver nanoparticle ink. The specific steps include dissolving silver acetate and octadecylamine in a methylbenzene solvent according to a proportion; then taking a lithium borohydride solution, dropwise adding the lithium borohydride solution to a mixed solution, stirring, then using a separating funnel to remove an aqueous solution at an upper layer, and leaving a methylbenzene layer containing silver particles; adding ethyl alcohol or acetone to perform washing and depositing nanoparticles; finally taking out a precipitate, and drying the precipitate in a vacuum drying oven at room temperature, thereby obtaining a nano-silver particle solid; dissolving the prepared silver nanoparticles in a solvent, thereby preparing silver nanoparticle ink; loading the silver nanoparticle ink in an ink box, and using an ink-jet printer to print nanoparticles on the surface of a PET substrate; and then performing thermal treatment on the PET substrate carrying the silver nanoparticles to obtain a nano-silver conducting film. The method for preparing the conducting film on the substrate surface based on silver nanoparticle ink greatly reduces cost, is simple and controllable in operation process, and is suitable for a subsequent yellow light process.

The invention relates to the field of metallurgy forging, in particular to a method for forging by using a tilting gear and a manipulation trolley instead of a sleeve for turning steel ingot. The method comprises the following steps of: 1) arranging the tilting gear at the tail or the head of the steel ingot, and clamping the cap at the head of the steel ingot by using a manipulator of the manipulation trolley; and 2) hooking the tilting gear by using a main hook of a crown wheel and making the tilting gear and the manipulator of the manipulation trolley simultaneously turn the steel ingot. Compared with the prior art, the method has the advantages that: the operating process of the method is easily controlled, the clamping force on the steel ingot is large, the operation is simple and convenient, the forging time is saved, and the working efficiency is improved.

The invention provides a manufacturing method of a silicon nitride heating plate, which comprises the following steps: 1, preparing cast slurry; 2, casting the cast slurry in a casting formation method and obtaining plain blanks after drying; 3, providing molten tungsten, using the molten tungsten to print a tungsten wire as a heating source at a corresponding position on one plain blank, and neatly buckling the other plain blank on the plain blank to form a plain blank combination; 4, packaging under vacuum conditions; 5, hot isostatic pressing: placing the plain blank combination packaged by a plastic film into liquid of 75-85 DEG C in an isostatic machine, and applying 130-160atmos to slightly melting and bonding the plain blanks; 6, pre-sintering; 7, sintering in an air pressure furnace; and 8, cooling to obtain the silicon nitride heating plate. The manufacturing process is simple, and the operation can be easily controlled. The pass rate of the silicon nitride heating plate manufactured in the method is higher, the silicon nitride heating plate has higher thermal conductivity and higher thermal efficiency, and silicon nitride also has higher thermal shock resistance.

The invention relates to an excrement detection device and an excrement detection method. The excrement detection device comprises a sampling detection assembly; the sampling detection assembly comprises a sampling pipe, a pipe cover assembled on the sampling pipe, a test paper bin arranged on the side wall of the sampling pipe, a piston arranged in the sampling pipe and a screw connected with thepiston; the lower end part of the screw protrudes downwards out of the bottom wall of the sampling pipe; a nut is assembled at the lower end part of the screw; a liquid through hole for communicatingthe test paper bin with the sampling pipe is formed on the side wall of the sampling pipe; a pipe cavity of the sampling pipe is divided into an upper cavity and a lower cavity by the piston; by rotating the nut, the screw and the piston can be driven to reciprocate in an up-and-down direction together; when the piston is positioned at a lower end point of the reciprocation motion, the liquid through hole is communicated with the upper cavity; and when the piston is positioned at an upper end point of the reciprocation motion, the liquid through hole is separated from the upper cavity by thepiston. The excrement detection device and the excrement detection method have the advantages of convenience for operation, controllable operation process, high automation degree and capacity of continuously storing mixed liquid after detection.

The invention relates to the technical field of carpets, in particular to an anti-fouling carpet and a preparation method thereof. The anti-fouling carpet comprises a water-proof layer, a hot melt adhesive layer, a wear-resistant layer and a nanometer TiO2 self-cleaning layer which are arranged from bottom to top in sequence, wherein multiple anti-skid bulge parts which are arranged at intervals are arranged below the water-proof layer, the upper ends of the anti-skid bulge parts is connected with the lower surface of the water-proof layer, and nanometer TiO2 particles are embedded into the nanometer TiO2 self-cleaning layer. According to the anti-fouling carpet, by arranging the nanometer TiO2 self-cleaning layer on the outer surface, the photocatalysis of the nanometer TiO2 particles inthe nanometer TiO2 self-cleaning layer can be used for degrading dust particles and stains attached to the surface of the anti-fouling carpet, so that the self-cleaning performance and the anti-fouling performance of the anti-fouling carpet are improved; moreover, by arranging the water-proof layer and the wear-resistant layer, the waterproofness and the wear resistance of the carpet are improved,the service life of the carpet is long, the preparation method of the anti-fouling carpet is simple and efficient, the operation process is easy to control, the preparation method of the anti-foulingcarpet is beneficial for industrial production, andthe prepared product is stable in quality.

The invention relates to a treatment method for improving the surface strength of an Al-Mg alloy. The treatment method comprises the following sequential steps that (1) an Al-Mg alloy material is subjected to surface treatment, cleaning and drying are conducted; (2) after the step (1) is completed, the Al-Mg series alloy material is placed in a heating furnace at the temperature of 450-500 DEG C,heat preservation is conducted for 30-40 minutes, and preheating treatment is conducted; (3) friction stir processing treatment is immediately conducted after the preheating treatment is completed; and (4) finally rolling forming treatment is conducted. According to the treatment method, surface layer grains can be further refined, the purpose of improving the surface strength of the Al-Mg alloy material is achieved, the service life of a stirring head can be further prolonged, the production efficiency of stirring friction machining treatment is improved, and the production cost is reduced.