306results about How to "Principles of Science" patented technology

The invention belongs to the technical field of petroleum and natural gas well completion, and relates to a supercritical carbon dioxide completion fluid. The supercritical carbon dioxide completion fluid is prepared by mixing a preflush spacer fluid, a supercritical carbon dioxide flushing solution and a post-flush spacer fluid according to a volume ratio of 2-5:100:1-5. When the supercritical carbon dioxide completion fluid is used, the supercritical carbon dioxide flushing solution and a cementing slurry are prepared on the ground, the preflush spacer fluid and the post-flush spacer fluid are prepared, the preflush spacer fluid, the supercritical carbon dioxide flushing solution, the post-flush spacer fluid and the cementing slurry are sequentially pumped into a well head through a present fluid device in order to flush, the cementing slurry solidifies after the flushing, and an alkaline substance is injected from an annulus to remove carbon dioxide in the supercritical carbon dioxide flushing solution in order to prevent pollution of carbon dioxide to atmosphere and corrosion of carbon dioxide to bushings. The supercritical carbon dioxide completion fluid has the advantages of easily available raw materials, scientific principle, use convenience, good cementing effect, low cost, effective reduction of the thickness of mud cakes, and improvement of the cleanliness and roughness of the mud cakes.

The invention relates to a fruit plant enzyme drink and a preparation method thereof. The fruit plant enzyme drink comprises the following formula components: 4% of white granulated sugar, 4% of honey, 4% of maltose and the balance being plant fruit raw materials, wherein the plant fruit raw materials comprise one or a plurality of green plum, smoked plum, mulberries, blueberries, raspberries, apples, peaches, red dates, grapes and wild jujubes. The preparation method of the fruit plant enzyme drink comprises the following steps: examining and receiving the raw materials, washing, fermenting, sterilizing and filling. The invention provides the drink with the health function. The drink has the functions of reducing the intestinal tract load, activating the healthy circulation system, adjusting the microecological balance, enhancing the human body cell vitality, purifying the blood, promoting the metabolism, inspiring the human body cell vitality, enhancing the metabolism function and enhancing the body rejuvenation.

The invention discloses an on-site sealed sampling device for coal bed gas. The device comprises a hollow long rod piece, wherein the outer circumference of the long rod piece is provided with a spiral convex edge; a coal storage cabin, a closed cabin, a transmission cabin and a power and control cabin are arranged in the long rod piece from front to back respectively; the closed cabin is provided with a coal inlet; a reciprocating push and pull mechanism is arranged in the transmission cabin; a micro power speed reducing motor for providing power for the reciprocating push and pull mechanism is arranged in the power and control cabin; the front end of the reciprocating push and pull mechanism is in transmission connection with a piston sliding sleeve device for opening and closing the coal inlet; and the front end of the coal storage cabin is provided with a gas resolution hole. The device is mainly used for a sampling link before the process of measuring the content of the gas in a laboratory, has high practical value and is easy to popularize and apply, the on-site sealed acquisition of a coal sample and the gas is realized, underground resolution is not needed, loss amount is not required to be calculated in the process of measuring the content of the gas, and reliable basic parameters are provided for related fields of coal mine gas prevention and control and the like.

The invention belongs to the technical field of testing equipment of buildings and relates to a pile soil interface shear simulation tester of an opened concrete pipe pile, wherein a screw rod is vertically installed on an operation platform, an upper end and a lower end of a spring are respectively fixed on a dismountable spring upper fixation plate and a dismountable spring lower fixation plate, a testing soil sample is placed inside an upper shear box, the top part is flush with the dismountable spring lower fixation plate, and the left side face of the upper shear box is rigidly connected to the operation platform; a concrete sample is placed inside the lower shear box, a slide track is disposed on the operation platform, the operation platform is connected to the lower shear box by a roller, and a numerical control motor is rigidly connected to the lower shear box; and a vertical displacement sensor is installed on the dismountable spring lower fixation plate, a horizontal displacement sensor is installed between the upper shear box and the lower shear box, and a load sensor is placed on a first steel rod on the left side of the upper shear box. The pile soil interface shear simulation tester of the opened concrete pipe pile has a simple structure, is operated conveniently, has scientific theories, obtains accurate testing results, has low cost and is applied widely.

A method for detecting porosity of pavement surface prepared by water penetration concrete includes brushing a layer of color juice on detection region of pavement surface, covering a white paper on brushed region before color juice is divided off, pressing balanced pressure on white paper fro mark-printing out print image being inputted into computer to carry out pixel binary treatment for calculating out area ratio of color print on complete white paper and utilizing a formula to calculate out porosity of concrete pavement surface based on said area ratio.

The invention belongs to the technical field of failure simulation test equipment for a coal mine working face floor, and relates to a mining failure simulation test device for a mine working face floor. Lateral loading fixers fixedly connected with lateral fixing plates are arranged at the two ends of a platform base; stress monitoring points are uniformly distributed on a tested rock mass at same depth in the horizontal direction; the stress monitoring points are connected with a stress acquisition system; an unloading and loading plate is fixedly installed at the upper end of the tested rock mass; detachable side edges are respectively installed on the two sides of the unloading and loading plate; a hydraulic servo unloading and loading unit is arranged between a top loading body and the unloading and loading plate; a main hydraulic servo loader is installed at the upper part of the top loading body; the main hydraulic servo loader is communicated with a top hydraulic pipeline; a hydraulic control servo system is connected with the main hydraulic servo loader, the hydraulic servo unloading and loading unit and the lateral loading fixer respectively. The mining failure simulation test device for the mine working face floor is simple in structure, scientific in principle, convenient to maintain, accurate in monitored data and convenient to operate.

The invention discloses a belt press filtering dehydration process and a device. The belt press filter dehydration process increases the area of pressure for press filtering dehydration of dehydrated materials from small to large according to the running direction of a filter belt, and the received dehydration pressure is gradually increased from small to large according to the running direction of the filter belt. The outside diameter of a press roller body of the belt press filtering dehydration device is constant, two or more bosses or grooves are formed on the surface of the roller body, and the surface area of the press roller body is gradually increased from small to large according to the running direction of the filter belt. The process of the invention can gradually strengthen the dehydration press of the dehydrated materials under the condition of keeping the tension and the diameter of the press roller unchanged, and has the advantages of convenient implementation and good press effect; and the device of the invention can simplify the structure of a belt press filter, and avoid the phenomena that the filter belt becomes looser and looser or tighter and tighter, and sludge leaking, creasing or lengthening of the filter belt and so on occur in the operation of the prior art on the premise of ensuring the press effect, thereby effectively preventing the sludge from transverse leaking and improving the efficiency of the press dehydration.

The invention belongs to the technical field of the palm print identification, and relates to a palm print identification method based on contour and edge texture feature fusion. The method comprises the steps of firstly preprocessing an image, disintegrating a palm print image into an image contour and an image edge texture by utilizing average value filter, carrying out characteristic extraction by adopting a grey level histogram and differential box dimension, and finally carrying out matching by utilizing the universal chi-square distance. The method is simple, the principle is scientific, the identification time is short, the identification precision is high, the palm print can be identified in real time, and a quick and effective identification method is provided for the identity identification.

The invention belongs to the technical field of metal protection, and relates to a preparation method of a graphene / polypyrrole protective composite film and application of the graphene / polypyrrole protective composite film on different metal surfaces. The preparation method comprises the steps of preoxidation, oxidation, compounding, electrodeposition and electroreduction. The electrodeposition is adopted to deposit the graphene oxide and polypyrrole on the metal surface to form a composite film, and the electrochemical reduction is performed to obtain the high-corrosion-resistance conductive polymer film. The method comprehensively utilizes the advantages of the graphene and conductive polymer, and overcomes the defects of low solubility and difficulty in processing of the conductive polymer. The method has the advantages of novel design, scientific principle, simple process, simple operation, high preparation efficiency, favorable corrosion resistance, no pollution and no waste.

The invention relates to a Chinese wolfberry enzyme and a preparation method thereof. For the first time, traditional medicinal and edible Chinese wolfberries are used as raw materials for preparing the enzyme, according to preparation conditions, natural generation conditions of the enzyme are stimulated, the principle is scientific, equipment is simple, and the Chinese wolfberry enzyme is suitable for mass production. Enzyme products obtained through fermentation not only have rich proteases, lipases, amylases, cellulases, superoxide dismutase, metabolism products and a large number of probiotic cells, but also have the efficacies of nourishing bodies and health care of Chinese wolfberries; the enzyme products not only fill in the blank of the prior art but also have high nutrient value and good health care efficacies; after being eaten for a long term, the enzyme products can have the medical value and the health-care effects of expelling toxins, nourishing faces, softening blood vessels, improving microcirculation, improving the antioxidant ability of organisms, delaying ageing, alleviating asthenopia and the like.

The invention discloses a detection device and a detection method for photovoltaic anti-islanding test. The detection device is composed of an upper computer, more than one intelligent power monitoring module, an I / O relay control plate, keyset K and a load module; the upper computer PC machine is connected with each intelligent power monitoring module and I / O relay control plate respectively through the CAN bus; the I / O relay control plate is connected with the load module through the keyset K; the load module is composed of a numerical value adjustable resistive load R, inductive load L and capacitive load C. The detection method judges whether the grid-connected measured voltage V satisfies the formula and judges whether the islanding phenomenon occurs after uploading the load module. The detection device and the detection method can exactly detect the islanding effect and are applied to various large capacity power devices for test.

The invention belongs to the technical field of particle system force chain recognition and relates to a contact force calculating and force chain recognizing method for particles in a three-dimensional particle system. The method comprises the steps of putting balls into a rigid container to form the three-dimensional particle system, utilizing a loading pressure head to pressurize the three-dimensional particle system, collecting an original sequence image and a target sequence image through an XCT scanner, utilizing a digital body related method to analyze the obtained original sequence image and the target sequence image to obtain stress of all points, then performing image edge detection on a target image, recognizing a particle centroid, reading coordinates of the particle centroid and position coordinates of contact points of all particles, establishing an equation set according to balance conditions of all the particles and solving the equation set to obtain magnitude and direction of contact force fi of all the contact point positions on each particle. The method has a simple principle, is convenient and flexible to use and has strong practicability, application environment friendliness and wide market prospect; in addition, required equipment is simple and easy to obtain, and measurement results are accurate.

The invention belongs to the technical field of composite material preparation and relates to a preparation method for an oxidized graphene / water-soluble polyurethane composite material. The preparation method for the oxidized graphene / water-soluble polyurethane composite material particularly comprises a graphite powder pre-treatment process, an oxidation treatment process, a post-treatment process and a moulding and measuring process. The preparation method for the oxidized graphene / water-soluble polyurethane composite material uses a physical blending method to perform the preparation of the oxidized graphene / water-soluble polyurethane composite material, the processes are simple, the cost is low, the controllability is strong, the preparation method for the oxidized graphene / water-soluble polyurethane composite material is suitable for large-scale industrial production, the prepared oxidized graphene / water-soluble polyurethane composite material is good in tensile strength and stretching strength, nanocomposite prepared by the preparation method for the oxidized graphene / water-soluble polyurethane composite material can be applied to the fields of engineering materials and special fiber, and a good application prospect is achieved; the preparation method for the oxidized graphene / water-soluble polyurethane composite material is novel in design, scientific in theory, simple in processes, simple in operation, high in preparation efficiency and good in finished product strength.

The invention belongs to the technical field of sand mixing equipment and relates to a continuous clay sand mixer. A new and old sand bin, a bentonite bin and a pulverized coal bin are arranged above a comprehensive charging hole, a moisture detector connected with a PLC control unit in an electric information mode is arranged under the new and old sand bin, and online detection of moisture of new and old sand before sand mixing can be achieved; after a human-machine control interface presets raw material parameters, the PLC control unit is used for analysis and calculation to control operation of a water pump frequency converter, a bentonite spiral feeding frequency converter and a pulverized coal spiral feeding frequency converter, and water, bentonite and pulverized coal are continuously added to a mixing cage in real time in an online and quantified mode; a return bin with a discharging mechanism is arranged under the mixing cage, so that mixed moulding sand is conveyed to the next production link; the mixer is simple in structure, reasonable in design, scientific in principle, simple in operation, high in sand mixing efficiency, good in sand mixing effect and good in finished product performance, the production efficiency is improved, and production cost is lowered.

A method for drawing a curve of the relationship between differential pressure and leakage rate during leak detection of sealed products is conducted on a leakage detection device for the sealed products by using a volume calibrator. The method is characterized in that the implementation steps are as follows: the volume calibrator is connected on a sealed container in which a unit under detection is positioned; a detecting point is set according to the required detecting range; different Delta V is adjusted by the volume calibrator; the particular value of differential pressure Delta PR corresponding to different Delta V is detected by the differential-pressure-type leakage detection device for sealed products; and then a curve of low leakage rate and a curve of high leakage rate in the curve of the relationship between differential pressure Delta PR and leakage rate are respectively finished. The method has the advantages that the principle is scientific, and no complex calculation is needed; the operation is simple, practical and easy to implement; by using the curve to detect, the accuracy rate is high.

The invention belongs to the technical field of automatic fitness equipment, and in particular relates to a gait-adjusting type running training device. A virtual scene large screen is electrically connected to a treadmill, wherein a pressure distribution measurement device is arranged on the treadmill; an inertial motion measurement and a biological signal acquisition device which are respectively in electric information connection to the treadmill are respectively used for measuring a leg motion amplitude of an exerciser and an electric muscle signal of the exerciser; a training system is arranged in the treadmill and is used for receiving signals on exerciser's exercise parameters returned by the pressure distribution measurement device, the inertial motion measurement device and the biological signal acquisition device in real time, and the signals, after being analyzed and processed, are fed back to the treadmill so as to regulate the speed of the treadmill; and meanwhile, the signals are fed back to the virtual scene large screen, so as to display exercise parameters as well as an outdoor exercise scene and a road condition matched with the exercise function state of the exerciser; and the device is simple in structure, skillful in design, scientific in principle, high in automation degree, broad in application scope and low in safety hidden trouble.

The invention belongs to the technical field of a mining fracturing simulating device for sealing drilling and relates to a mining fracturing simulating test device for sealing drilling, wherein a model frame is vertically provided with a lateral loading device which is respectively connected with a hydraulic power control system; the inside of the model frame is provided with an independent compression clapboard, a drilling monitoring sensor is arranged in the middle drilling hole of the entire device, the top orifice side wall of the drilling hole is provided with a top bush, the inside wall of the drilling hole is provided with a sensing sheet for measuring electrode stress and strain, the top of the entire device is symmetrically provided with a compression plate whose upper end is provided with a top loading device, a plurality of stress monitoring points are arranged in the entire device, a computer control processing system is electrically connected with an ultrahigh density electrical measurement system, a stress data collecting plate, an imaging data collecting plate and the hydraulic power control system respectively; the device is simple in structure, convenient to maintain, install and operate, scientific in principle and precise in collected data.

The invention belongs to the technical field of hydrate drilling exploitation equipment and processes and relates to a supercritical carbon dioxide jet injection drilling exploitation hydrate device and method. The supercritical carbon dioxide jet injection drilling exploitation hydrate device is adopted to realize exploitation of hydrate, a carbon dioxide storage device is filled with carbon dioxide firstly, then the carbon dioxide is continuously cooled to the liquid state via a storage tank cooling device, the liquid carbon dioxide is pressurized by a high pressure pump prior to be pumped into a drilling tool for jet drilling by the aid of the prior art, after the drilling tool drills into a hydrate reservoir, the jet temperature of the high-pressure supercritical carbon dioxide injected by a drill bit is lowered, the hydrate brought out of a wellbore and a near wellbore formation moves upwards along an annular space; after reaching a wellhead throttling device, the hydrate sequentially passes through a three-phase separator and a gas separator to spate natural gas and carbon dioxide so as to complete exploitation of the hydrate. The used device is simple in structure, convenient to operate, low in maintenance cost, simple in exploitation method, scientific in principle and safe in exploitation process.

The invention discloses a well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate. The device is mainly composed of a manmade rock core or a steel pillar, an outer cylinder, a conversion adapter, a transmission device, a motor, a frame, a bearing plate and a thick liquid cup. The bearing plate and the motor are arranged on the frame. The thick liquid cup filled with flushing fluid is arranged on the bearing plate. The manmade rock core or steel pillar and the outer cylinder are located in the flushing fluid in the thick liquid cup. The manmade rock core or steel pillar is fixed on the frame through the conversion adapter. The outer cylinder is connected with the motor through the transmission device. The outer cylinder is provided with two rows of round holes for the flushing fluid to flow and the intervals of round holes of each row are 90 degrees. According to the well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate, the manmade rock core or the steel pillar is used for simulating a well wall and a casing pipe under a static state and the well cementation flushing fluid evaluation device and method are closer to engineering practice. The well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate have the advantages of being easy to operate, high in relative property and wide in application range and can measure the flushing efficiencies of a first interface and a second interface of well cementation by the flushing fluid respectively. According to the flushing efficiencies and the flushing time, a flushing fluid system is selected in an optimization mode and the use amount of the flushing fluid is designed. The well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate have the wide market prospect.

The invention discloses an elevated uniform automatic road which comprises a roadbed, a track and an elevated uniform automatic road surface, the roadbed is in a shape of the athletics field runway, the track is arranged on the roadbed in a shape of circular close structure, the elevated uniform automatic road surface is composed of a plurality of panels orderly connected from the front part to the rear part and has the same close structure with the track, a power driving wheel rolling along the track is arranged below each panel; the elevated uniform automatic road surface is driven by the power driving wheel for executing uniform automatic operation. The elevated uniform automatic road is more convenient and faster compared with the driving by oneself, the travel cost is greatly reduced for people, most people has no need to drive a car in the city, the vehicle number on the city road is greatly reduced, the unrenewable and one-off resource as the petroleum and the natural gas can be greatly saved and elevated uniform automatic road is extremely beneficial to the ecological environment and sustainable development. The elevated uniform automatic road has good practicability and higher popularization and application value, the running cost is low, the energy is saved and the consumption is reduced and the elevated uniform automatic road is worth for promoting application.

The invention discloses a testing device for the electrical characteristics of a rock sample in a multi-field coupling state. The testing device comprises a resistivity test module, a stress test module, a seepage test module, an upper test probe and a lower test probe. The resistivity test module comprises a direct-current electric method instrument and a plurality of annular electrodes wound around the rock sample to be tested in a layered mode, and the annular electrodes are connected to the direct-current electric method instrument through a direct-current electric method instrument optical cable. Insulating protection layers are arranged on the upper end face and the lower end face of the rock sample to be tested respectively, gaps into which the upper test probe and the lower test probe stretch respectively are formed in the insulating protection layers respectively, and insulating fixing plates are arranged on the outer circumferential surface of the rock sample to be tested. The stress test module comprises a pressure device and a stress sampling device. The seepage test module comprises a high-pressure water inlet system which is communicated with a water inlet hole in the upper test probe, a water outlet is formed in the lower test probe, and a water flow meter is arranged in the water outlet. The invention further discloses a testing method using the testing device. The testing device is simple in structure and convenient to operate.

The invention relates to a sand-stone separator, and is characterized in that the sand-stone separator comprises a drive motor, a tapering separating barrel and helical blades, wherein the drive motor is connected with one end of a blade shaft through a reducing gear, and the other end of the blade shaft is connected with the tapering separating barrel in a rotating mode; the blade shaft is provided with a plurality of the helical blades which present in a tapering shape as a whole; the helical blades gradually shrinks along the propulsion direction, and the tapering separating barrel is sheathed outside the helical blades; the front outlet of the tapering separating barrel is correspondingly jointed with the rear inlet of a screening barrel; the screening barrel is a grid-shaped barrel body, and the outlet thereof is arranged in a downward sloping mode. The sand-stone separator of the invention can separate the sand-stone more thoroughly, has higher working efficiency, enables wastewater and slurry water to be recycled by separating and recovering the sand-stone, has thorough recovering effect, reduces resource waste, and greatly reduces production cost, truly reaching the environmental requirements of zero removal and transportation, no emission and no pollution.

The invention provides a preparation method and a corrosion-preventing implementation method of a super-hydrophobic sponge material and belongs to the field of metal corrosion protection. The method comprises the steps that a soaking method is adopted to modify organosilane on the surface of melamine sponge and change the hydrophilic sponge into super-hydrophobic sponge, the bulked super-hydrophobic sponge serves as a coverage layer attached to the metal surface, a seawater phase and a metal phase are isolated, an air pump is utilized to delivery dried air to the metal surface and the bulked super-hydrophobic sponge, and a ventilating-super-hydrophobic sponge comprehensive corrosion-preventing system is established innovatively. The super-hydrophobic sponge material is characterized in that the super-hydrophobic sponge can convert underwater complicated seawater corrosion reaction into oxygen and water participated atmospheric corrosion reaction. The water vapor in a sponge structure can be further carried away by adopting a ventilation method, the moisture in the sponge is brought out through flowing of the dried air, accordingly a dried state inside the sponge is kept, complicated seawater corrosion reaction is finally converted into dried air participated slow oxidation reaction, and accordingly metal corrosion prevention is achieved.

The invention relates to the field of composite materials and medical appliances, and particularly provides a method of producing a sandwich-structure sensitization-free high-isolating condom from graphene laminating nano boron nitride compounded latex. The method includes the steps of: a) laminating and compounding graphene treated in an electric field and modified hexagonal nano-lamella boron nitride according to weight mass ratio of 5-2000%; b) compounding the compound in the step a) with latex according to solid mass ratio of 0.005-1%, wherein the prepared compound latex liquid is used in a second impregnation step, while in the first and third impregnation steps, a normal latex material is applied for impregnation, thereby finally producing the sensitization-free high-isolating condom having a sandwich structure. The condom in the invention has a stable transparent color and is not liable to have defects, such as graying, darkening, allergy of skin contact, and poor weather-resistant stability, due to deterioration of graphene. When the graphene is laminated with the nano-lamella boron nitride, which is also called white graphene, the tensile strength, flexibility and heat conductivity of latex are improved and permeation of virus liquid is effectively isolated.

A coal seam coring sealing device comprises an inner drill pipe, an outer drill pipe and a power drill pipe which are each of a hollow structure, wherein the inner drill pipe is inserted in the outer drill pipe in a sliding mode; the connecting positions of the inner drill pipe and the outer drill pipe are connected through a sealing sleeve pipe; the bottom end of the power drill pipe is connected with the top end of the inner drill pipe; the outer wall of the sealing sleeve pipe is fixedly connected with the inner wall of the outer drill pipe; air pores communicating with the inside of the outer drill pipe are formed in the pipe wall of the sealing sleeve pipe along the axis and provided with air pore caps; an air bag, three inflation mechanisms and twelve bottom end plugging mechanisms are arranged at the bottom end of the outer drill pipe; the air bag is arranged in the circumferential direction of the bottom end of the outer drill pipe; and the three inflation mechanisms are all connected with the air bag. In conclusion, the coal seam coring sealing device is simple in overall structure, scientific in principle, safe, reliable and capable of greatly reducing the leakage amount of original gas in a coal seam during coring.

The invention belongs to the technical field of quenching and cooling, and relates to a quenching and cooling device. The quenching and cooling device includes a quenching tank, a quenching bench, a quenching bench lifting system, a medium circulating system, a medium outlet system, a medium blowdown system, a cooling zone carrier roller, a power motor, a leading screw, a nut, a guiding sleeve, a guide rail, a circulating pump, a variable frequency motor, a liquid suction pipeline, a liquid suction port, a liquid discharging pipeline, an electronic flow meter, a cooler, an electric regulating valve, a flow controller, a medium outlet, a flow guiding plate, blades, a coaming plate, a fan and a fan cover, and the quenching bench lifting system includes the power motor, the leading screw, the quenching bench, a guide sleeve and the guide rail. The quenching and cooling device has the advantages of high automation degree, fast cooling speed, controllable cooling process, controllable flow, pressure and flowing direction of a cooling medium, uniform cooling, improvement of the product heat treatment quality, reduction of the loss of the cooling medium, reduction of the cleaning workload, increase of the working efficiency, ingenious and reasonable design of the overall structure, scientific principle, convenience in operation, convenience in use, good safety and reliability, and friendliness to application environment.

The invention belongs to the technical field of materials science, and relates to an environment-friendly, efficient and convenient nondestructive transferring method of a graphene film. The nondestructive transferring method comprises the following steps: a metal foil on which the graphene film grows is put on a glass slide flatwise, and an adhesive tape is affixed to the graphene film; the metal foil of which the surface is attached with the adhesive tape is put into a corrosion solution, is corroded for 2-10 hours, and is removed to obtain an adhesive tape / graphene film structure; the adhesive tape / graphene film structure is picked up, is affixed to a target substrate after hydrophilic treatment by using a 10-50W plasma cleaning machine, and is naturally placed at room temperature for 3-6 hours to obtain an adhesive tape / graphene film / target substrate structure; finally, the adhesive tape on the surface of the adhesive tape / graphene film / target substrate structure is slowly torn in the parallel direction to realize the nondestructive transferring. The nondestructive transferring method is novel in design, scientific in principle, simple in process, easy to operate, and relatively good in transferring effect.

The invention discloses a protection device eliminating electric system non-linear harmonic vibration. The neutral point installation electronic type rapid harmonic-vibration eliminating device comprises a switch device DK, an electronic control device KZQ and a signal collection device CG. The switch device DK is used for cutting off a zero-sequence current, and therefore restrains development of harmonic vibration. The electronic control device KZQ is used for collecting and judging the operation state of a system, and when the system has harmonic vibration, the electronic control device KZQ instantly sends an action command to the switch device, enables the switch device to be switched off for a short time, and eliminates harmonic-vibration faults; meanwhile, fault information is recorded, and the action state is sent to a supervisor. The signal collection device CG sends collected zero-sequence current signals to the electronic control device so that the electronic control device can judge the operation state. The neutral point installation electronic type rapid harmonic-vibration eliminating device is wide in application range, harmonic vibration caused by various reasons can be instantly, rapidly and reliably eliminated, the system is without any harmful effect, and a voltage mutual inductor can be effectively protected. The neutral point installation electronic type rapid harmonic-vibration eliminating device has the advantage of being simple in structure, convenient to work, high in reliability and low in cost.

The invention discloses a method for determining the large karst spring replenishment channel and intensity. The method comprises the following steps of 1, using a spring water position to judge the sensitivity of a rainfall station; 2, determining the main runoff zone depth and distribution thereof; 3, verifying the main runoff zone depth and distribution thereof determined in the step 2 througha temperature and conductivity tracer technique; 4, calculating the intensities of different runoff replenishment sources. By means of the method for determining the large karst spring replenishment channel and intensity, on the basis of the nature of a regional hydrogeological condition, through the four elements of the relevance of the rainfall station and the spring water position, the karst fissure rate, the temperature tracer and the water chemical mixing ratio, the outdoor large-scale karst spring replenishment channel is precisely identified, a scientific basis is provided for protection of large karst spring water flow and water quality, and decision-making support is provided for related government departments to manage groundwater resources.

The invention provides a coal mine underground bottom pumping roadway crossing borehole anti-hole spraying construction method. The method comprises the following steps of (1) installing a hole drilling and reaming section hole sealing pipe; (2) connecting a connecting port of a wing-shaped water slag gas diverter with a lower port of the hole drilling and reaming section hole sealing pipe; (3) correspondingly connecting the wing-shaped water slag gas diverter, a negative pressure energy accumulator, a water slag collector, a control system and a gas extraction pipeline in a roadway; (4) arranging a drill rod sealing guide device on a drill rod in a sleeving mode, wherein the drill rod sealing guide device is fixedly connected to a middle connecting port of the wing-shaped water slag gas diverter, the drill rod is arranged on a drilling machine, and the drilling machine is fixed; and (5) starting the drilling machine to perform drilling operation. According to the method, the principleis scientific, the design is reasonable, the automation degree is high, gas, water and coal slag can be conveniently separated from one another in the crossing borehole construction process, and thegas overrun accident caused by the fact that the gas is poured into the roadway when hole spraying occurs in the bottom pumping roadway drilling construction process is prevented.