76results about How to "Extended high" patented technology

The invention relates to a method for improving the complexity index of a deep shale gas fracture. The method is characterized in that when a fracturing design of the a deep shale gas well is performed, selection and an injection manner of a fracturing fluid, selection of a supporting agent, and the number of perforations are optimized and controlled, and an artificial main fracture can be opened and communicate with a natural fracture as much as possible in an extending process; extension of a single fracture is longer, expansion of the single fracture is wider, and finally the complexity of the deep shale gas fracture can be improved to the greatest extent. The method can be used for deep shale gas reservoirs having the depth of more than 3500 meters and in which the natural fractures containing carbonate minerals are distributed in a reconstruction range of the artificial main fracture, and a certain included angle is formed between the fracturing main fracture and the natural fractures. The method is reasonable in design, is simple in process, is easy to operate, is high in fracturing construction successful rate, can effectively increase the volume of deep shale gas segment fracturing fractures, can remarkably improve the fracturing construction effect, and can acquire more economic benefits.

The invention discloses an uncured polyurethane waterproofing coating and a preparation method thereof, belonging to the technical field of polyurethane waterproofing coatings. The uncured polyurethane waterproofing coating is prepared from the following raw materials in percentage by weight: 13-20% of prepolymer, 30-65% of asphalt, 1.0-1.5% of latent curing agent, 3-15% of compatilizer, 2-9% of thermoplastic elastomer and 0-3% of powder stuffing, wherein prepolymer is a substance synthesized by reaction between polyether and isocyanate. The uncured polyurethane waterproofing coating mainly aims to improve the material proportion and polymerization process of polyurethane, and the problem that a hot-melted asphalt material is needed to be heated by using a machine is solved; the uncured polyurethane waterproofing coating is convenient in construction and good in flowability; the viscosity of the constructed material can be automatically enhanced, so that the constructed material can become an elastic plastic body and a favorable waterproofing layer without internal stresses; in addition, the uncured polyurethane waterproofing coating can be well bonded with a coiled material and can be compounded to be waterproof so as to form a waterproofing layer capable of overcoming tension fracture caused by basement layer cracking and preventing puncturing; the uncured polyurethane waterproofing coating is simple and convenient in process, rapid in construction, free of maintenance, high in working efficiency and capable of becoming the development direction of building waterproofing in the further.

The invention relates to a preparation method for a conduction and sustained release type nervous tissue engineering scaffold. The method comprises the following steps: silk fibroin Silk and lactic acid-caprolactone copolymer are dissolved in a solvent, dissolved and stirred to obtain a solution, then polyaniline and camphorsulfonic acid are added and stirred and mixed uniformly to obtain a cortex electrospinning solution, and NGF (nerve growth factors) are dissolved in ultrapure water completely to obtain a core electrospinning solution; and the cortex electrospinning solution and the core electrospinning solution are accommodated in an injector respectively for coaxial electrospinning, and then fumigation treatment and vacuum drying are performed to obtain the conduction type nervous tissue engineering scaffold. According to the prepared nanofiber scaffold, the nerve repair speed is increased from ways including external electrical stimulation (conductive polymer), biochemistry (NGFs), a topological structure required by nerve regeneration (orientation guide) and the like. The method is simple to operate, good in repeatability and high in economic benefit, and provides novel experimental thought for nerve defect repair in clinical application.

The invention relates to a pant rhizosphere friendship fertilizer which uses divalent metal ammonium phosphate sylvine wrapped fertilizer and / or slightly soluble nitrogen-containing compound buffer fertilizer and water soluble potash fertilizer, root accelerator, root inducer, fertilizer with micro element and additive to make the buffer-control fertilizer.

A Cistanche breeding method is characterized by including steps of 1, culturing artificial Haloxylon ammodendron forests, planting for 2 to 3 years after 1 to 2 years, and then inoculating the Cistanche; 2, digging seedbeds on the east or southeast direction of the field Haloxylon ammodendron forests, establishing one seedbed with the 1.5m length, 1m width and 0.7m depth far from the host root 50 to 80cm; sowing seeds on the seedbeds, and applying 30 to 40 cm of nutrient-medium humus; sowing in spring or autumn, allowing the Cistanche to be parasitic in the second year and sprout, blossom and bear fruits in 2 to 4 years after sowing; 3, when the Cistanche blooms in May, performing artificial pollination, and increasing fruit bearing rate. The method has the advantages that the problems that market demands cannot be met through wild Cistanche and resource depletion is caused by large-scale wild Cistanche exploitation are solved.

The invention relates to a soil column combination matrix composite flow artificial wetland treatment system, which uses a composite underflow artificial wetland mode and comprises an artificial wetland pool, a soil column combination matrix system, an artificial wetland plant system and a water distribution system. The soil column combination matrix system is the core of the whole artificial wetland system and comprises a prefiltering unit, a combination matrix denitrification unit, a combination matrix dephosphorization unit and a fine filtering unit, and soil columns are arranged in the combination matrix denitrification unit and the combination matrix dephosphorization unit. The artificial wetland plant system is formed by aquatic plants such as reeds, cattails, cane shoots and the like by mixed planting and planted onto the combination matrix denitrification unit and the combination matrix dephosphorization unit after earthing. The artificial wetland pool is matched with the water distribution system to construct the artificial wetland system having multiple flow regimes including vertical downward flow, vertical upward flow, horizontal underflow and the like. The soil column combination matrix composite flow artificial wetland treatment system is reasonable in design of each portion, scientific in structure, small in occupied space, low in operation cost and convenient in management, and is a novel artificial wetland technique which can effectively purifying polluted water body.

A regulating method aims at the physical structure of a high-yield soil for summer corns, and belongs to the technical field of agricultural production. The regulating method of the invention is as follows: (1) deep ploughing (loose) before sowing: before the seeding of the previous crops before the summer corns, the soil is deeply ploughed (loose), the tilth is 30 to 35cm, the unit weight of a soil horizon of 0 to 20cm is 1.2 to 1.3g / cm3 by deep ploughing, the unit weight of the soil horizon of 20 to 40cm is 1.3 to 1.4g / cm3, and 15 kilograms of urea are fertilized per mu; and (2) ridging after sowing: before the seeding of the corns, wide row and narrow row seeding is required to be carried out, the space between the wide rows is 70 to 80cm, the space between the narrow rows is 40 to 50cm, during the jointing stage of the corns, cultivation, banking and ridging are carried out, ditches are opened in the wide rows of the corns, the narrow rows are banked and ridged, the ridge height is 15 to 20cm, and the ridge face width is 50 to 60cm. The invention can obviously reduce the unit weight of the no-tillage summer corn soil, increase the soil porosity, improve the physical behavior of the soil, increase the biological activity of the soil and enhance the biological fertility, facilitate the growing and development of the root system of the corn and increases the activity of the root system, and obviously improve the crop production and the benefits.

The invention belongs to the technical field of the plant tissue culture, and particularly relates to a cultivating method for acquiring a Zengcheng honey chrysanthemum virus-free seedling through micro-stem tip culture combined with heat treatment. The provided cultivating method for acquiring the Zengcheng honey chrysanthemum virus-free seedling through the micro-stem tip culture combined with the heat treatment comprises the following steps: breeding a good strain, establishing a tissue culture sterile tissue culture vessel seedling, pre-eradicating viruses by heat treatment culture, eradicating viruses by the micro-stem tip culture, establishing a virus-free stem tip tissue culture sterile breeding system, detecting a virus-free stem tip tissue culture seedling virus and industrially growing the seedling through virus-free seedling tissue culture and the like. The provided method for acquiring the Zengcheng honey chrysanthemum virus-free seedling is capable of using the micro-stemtip tissue culture combined with heat treatment virus eradication, and cooperating with an improved culture medium, is high in virus-free seedling survival rate, rapid in breeding speed, and capable of industrially breeding the growing the seedlings through the large-scale tissue culture, and high in economic benefit.

The invention discloses a high-temperature heat shock method for promoting creation of a microfracture on a hydraulic fracture surface of a tight gas well. The theory is that high-temperature gas is injected into a preferable hydrofracture tight gas well to perform high-temperature thermal treatment on the hydraulic fracture surface, thermal stress and a thermal supercharging effect are achieved by using the heterogeneity and the anisotropism of thermal expansion of rock forming minerals, thermal expansion of water vapor and the pyrolysis hydrocarbon generation effect at high temperature due to possible existence of organic matters in rocks, so that microfractures grow near the hydraulic fracture surface on reservoir rocks. The high-temperature gas is continuously and intermittently fed toextend and cut through the microfractures to form a microfracture network, thus increasing the microfracture density of a tight gas reservoir. By implementation of the method, on the basis of hydrofracturing transformation, the tight gas reservoir recovery efficiency is further improved.

The invention discloses nerve regeneration biogum and a preparation method and an application thereof. The nerve regeneration biogum is prepared from fibrinogen, NaCl, hemopexin and 12 neurotrophic factors, wherein the fibrinogen, the hemopexin and the NaCl form a base support matrix. The biogum disclosed by the invention can promote regeneration and intramedullary extension of a nerve cell, and can increase the contact frequency of damaged nerve cynapse and normal nerve synapse by verification of an in-vitro cell test and an animal test. A plurality of neurotrophic factors in the biogum have important roles in regeneration and extension of the nerve cell, building of synaptic connection and forming of a blood vessel, can be further used for clinically repairing spinal nerve trauma and treating patients with spinal cord injury. The nerve regeneration biogum can be gradually applied to other central nervous system diseases, such as injury of brain tissue, optic nerve injury and the like.

The invention discloses a preservation method of tricholoma matsutake (tricholoma matsutake (ItoetImai)Sing.). The preservation method comprises the following steps: firstly precooling tricholoma matsutake at 2-8 DEG C in a refrigeration house, sealing the tricholoma matsutake in an air-conditioning preservation box, and refrigerating the air-conditioning preservation box at 2-8 DEG C in the refrigeration house, wherein in the air-conditioning preservation box, the concentration of nitrogen is 80%-96%, the oxygen concentration is 2%-10%, and the carbon dioxide concentration is 2%-10%. The storage period of the tricholoma matsutake processed by virtue of the preservation method is 15-20 days longer than that of the unpreserved tricholoma matsutake stored at 2-4 DEG C in summer and is 20-25 days longer than that of the unpreserved tricholoma matsutake stored at the low temperature of 10-16 DEG C; furthermore, the preservation method has the beneficial effects that the toxicity, smell and the pollution are avoided, the efficiency is high, and the environment is protected, and the unresolved preservation problem in the extension of industrial chains of the tricholoma matsutake is effectively solved; the preservation method has wide application prospect.

The invention discloses a preparation method of a fruit tree pollen solution and a pollination method. The preparation method of the pollen solution comprises the steps of: adding food grade glucose powder into cleaning water with the PH value of 6.5-8.2, preparing glucose water solution with the percentage concentration by weight of 4-7% for later use according to the weight, adding the acquired pollen into the glucose water solution according to the proportion that 2-5g of pollen is added into each 100g of the glucose water solution, and evenly stirring to lead the pollen to be suspended in the glucose water solution, so that the obtained pollen glucose suspended mother solution is the fruit tree pollen solution of the invention. The use method of the fruit tree pollen solution comprises the steps of diluting by the glucose water solution and adding the Solubor according to 0.1-0.3% weight to atomize and pollinate. Compared with the prior art, due to the use of the fruit tree pollen suspension, the artificial pollinating efficiency and the fruit-bearing rate are improved, and the planting quantity of the pollinating tree in an orchard garden can be greatly reduced, so that the economic benefit of the orchard garden is further increased, and the invention has the advantages of being fast in applying speed, easy to control the use level of the pollination, good in pollination effect, and pollen use level-saving.

The invention relates to the technical field of nervous tissue engineering materials, and particularly provides a chitosan-based nerve fiber membrane, a preparation method, a nerve conduit and application. The chitosan-based nerve fiber membrane is formed by a plurality of composite nanofibers which are arranged in an directional manner; each composite nanofiber is of a core-shell structure, a shell layer of each nanofiber comprises a degradable functional material, a hydrophilic functional group modified carbon nanotube, lycium barbarum polysaccharide and chitosan and / or a chitosan derivative, and a core layer of each nanofiber comprises a nerve growth factor and a stabilizer. The chitosan-based nerve fiber membrane disclosed by the invention has the characteristics of good orientation arrangement, good mechanical property and high biological responsiveness; and during degradation, the chitosan and / or chitosan derivative hydrolysate and alkalinity of amino groups carried by the chitosan and / or the chitosan derivative hydrolysate can effectively neutralize weak acidity of degradation products, influences of acidic degradation products on the surrounding environment and tissues areavoided, and therefore the fiber membrane can be applied to nerve repair and regeneration of human bodies and animal bodies.

The invention discloses a preservation method of boletus bainiugan dentinger. The preservation method comprises the following steps: firstly precooling the boletus bainiugan dentinger in a refrigeration house at 2-6 DEG C, sealing after being placed in a gas-adjusted fresh-preserved storehouse, and then cold-storing in the refrigeration house at 2-6 DEG C, wherein the concentration of nitrogen in the gas-adjusted fresh-preserved storehouse is 80-96%, the oxygen concentration is 2-10% and the carbon dioxide concentration is 2-10%. The storage period of the boletus bainiugan dentinger treated by using the method disclosed by the invention is prolonged by 6-9 days in comparison with the boletus bainiugan dentinger which is stored at 2-4 DEG C without the preservation treatment, and is prolonged by 10-15 days in comparison with the boletus bainiugan dentinger which is stored at 10-16 DEG C without the preservation treatment; and meanwhile, the conditions such as worm damage, rotting and lesion of the boletus bainiugan dentinger treated through the method disclosed by the invention can be obviously improved in the storage period, and the sensory quality such as the appearance, the flavor and the like can be well maintained.

The invention relates to a continuous rotating integrated leg support which comprises a leg support overturning structure, a leg support extending structure and a leg support extending driving structure, the leg support overturning structure is installed on a cushion framework in an overturning mode and comprises a supporting arm, a synchronous rod and a single motor, the synchronous rod is connected with the motor, and the supporting arm is connected with the leg support extending structure. The supporting arm is connected to the synchronous rod so as to be driven by a motor to rotate around the central axis of the synchronous rod, and the leg support extending structure is installed on the leg support overturning structure in an extendable mode through the leg support extending driving structure so as to be overturned and extended continuously and simultaneously between the initial position and the unfolding position. According to the continuous rotating integrated leg support, rotating, overturning and extending can be continuously achieved at the same time only through one motor, the cost is low, and the overall appearance is integrated.

The invention discloses a carbon dioxide ultrasonic oscillation foaming device. The carbon dioxide ultrasonic oscillation foaming device comprises a water-based fracturing system, a pressure monitoring system, a high-pressure gas injection system, an ultrasonic oscillation system and a central control system; the water inlet end of a high-pressure water pump is connected with a fracturing fluid storage tank, and the water outlet end of the high-pressure water pump is connected with the water inlet end of a high-pressure pipeline; a pressure sensor is connected with a data integrator through a waterproof cable; the gas inlet end of a high-pressure gas pump is connected with a carbon dioxide storage tank, and the gas outlet end of the high-pressure gas pump is connected with the gas inlet end of a gas injection pipe column; an ultrasonic transducer is connected with an ultrasonic generator through a transmission cable; and the high-pressure water pump, the data integrator, the high-pressure gas pump and the ultrasonic generator are connected with the central control system through signal cables. Meanwhile, the invention further discloses a carbon dioxide ultrasonic oscillation foaming graded fracturing strengthening method. According to the carbon dioxide ultrasonic oscillation foaming device and the graded fracturing strengthening method thereof, foam losses in the transmission process from the ground to a shaft can be reduced, secondary graded fracturing can be achieved through water-based fracturing and then foaming fracturing, the filter loss in the fracturing initiation stage is reduced, and the fracturing operation effect is improved.

The invention provides a DNA single molecule sequencing method and a sequencing system, the DNA single molecule sequencing method comprises the following steps: S1 modifying the sursurface of a substrate, connecting a water-soluble bifunctional linking unit to the sursurface of the substrate; and connecting a primer P1 with the water-soluble bifunctional linking unit to obtain the substrate to which the primer is immobilized; S2, placing a mixed solution containing a DNA template to be tested, polymerase, and a four-color fluorescently-labeled reversible terminator on the substrate to which the primer P1 is immobilized, and performing extension to form a fluorescein-containing primer / template complex; S3, imaging the extended primer / template complex to determine nucleotide base species involved in the extension; S4, breaking cleavable linkage units of nucleotides involved in the extension, and performing next extension; and S5, repeating the steps S2 to S4 to obtain the base sequence of the DNA template to be tested. The DNA single molecule sequencing method is capable of perfecting the effect of extending only one reversible terminator in a single sequencing cycle.

The invention discloses a pore sealing agent and a pore sealing process for improving the long-term corrosion resistance of a supersonic speed flame sprayed iron-based amorphous coating, and belongs to the technical field of coating pore sealing processes. The pore sealing agent is a solution formed by dissolving Al(OH)3 in phosphoric acid at a certain temperature. According to the pore sealing process, an iron-based amorphous coating is soaked into the pore sealing agent, treatment is performed for 5 h under the excitation of ultrasonic vibration, and heat treatment is performed, wherein theheat treatment comprises carrying out thermal insulatin for 2 h at a temperature of 110 DEG C, carrying out thermal insulatin for 2 h at a temperature of 200 DEG C, and thermal insulatin for 1.5 h ata temperature of 350 DEG C so as to obtain the pore sealing cating with long-term corrosion resistance. According to the present invention, with the pore sealing process, the deep and effective sealing on the supersonic speed flame sprayed iron-based amorphous coating can be achieved, and the long-term corrosion resistance and the service life of the coating in the corrosive environment can be improved; the pore sealing agent is the non-toxic inorganic pore sealing agent; and the preparatin process is simple, the operation is convenient, and the prepared pore sealing agent has good storage stability.

The invention relates to a processing method of rice bran dietary fiber fine dried noodles. The rice bran dietary fiber fine dried noodles are mainly prepared from the following raw materials in parts by mass: 100 parts of wheat flour, 1-8 parts of rice bran dietary fibers, 0.5-2.5 parts of table salt and 30-55 parts of water. The processing method comprises the following steps: a, dissolving the table salt in the water for later use to obtain table salt water; b, uniformly mixing the wheat flour with the rice bran dietary fibers sieved by a 60-140-mesh sieve to obtain a mixture; and c, mixing the table salt water obtained in the step a with the mixture obtained in the step b, kneading dough by adopting a conventional method, and processing fine dried noodles by adopting a conventional method. In order to solve the problem that the fine dried noodles are rough in taste, the improving method comprises the step of adding cassava starch and (or) cassava pregelatinized starch in a proper proportion. A rice bran dietary fiber fine dried noodles product is processed by adopting the method. The product has nutritional and health values and can promote defecation of human bodies and reduce absorption of hazardous substances. The processing method provided by the invention is conducive to promoting extension of a value adding chain of deep rice bran processing.

A method for preparing an ADI nodular cast iron capable of resisting the impact of a low temperature of 40 DEG C below zero relates to a method for preparing a low-temperature-resistant ADI ductile iron, and solves the technical problem that the impact energy of a conventional ADI ductile iron 900 / 650 / 09 in a high-cold environment is relatively low. The method comprises the following steps: firstly, melting ductile cast iron Q10, low-manganese steel scrap and returns and a proper amount of nickel plates and then adding nickel plates and sheet copper for smelting so as to obtain an iron liquid; secondly, performing spheroidization and inoculation treatment; thirdly, adding a desulfurization agent; fourthly, casting to obtain a sample; fifthly, preserving heat of the sample twice, then placing the sample into a nitrate medium, and discharging to obtain the ADI nodular cast iron. The ADI nodular cast iron has the yield strength of 660-690 MPa, the tensile strength of 910-950 MPa and the elongation of 9-11%, and the unnotched impact value of the ADI nodular cast iron prepared at the temperature of 40 DEG C below zero is 105-120 J. The method is applied to the field of nodular cast iron preparation.

The invention belongs to the technical field of biomedical materials, and discloses a conductive degradable multifunctional tissue engineering scaffold and a preparation method thereof. A precursor for forming the conductive degradable tissue engineering scaffold comprises a two-dimensional phosphorus-based nano material, a biopolymer material and a cross-linking agent, wherein the biopolymer material and the cross-linking agent are used for forming a framework of a hydrogel scaffold, and the two-dimensional phosphorus-based nano material is used for being loaded in or on the surface of the hydrogel scaffold to improve the conductivity of the scaffold. The key components of the scaffold and the precursor thereof are improved, and the two-dimensional phosphorus-based nano material is introduced to be matched with the biopolymer material (such as a natural polymer material naturally existing in nature) to participate in formation of the conductive degradable multifunctional tissue engineering scaffold and the precursor thereof, and the obtained tissue engineering scaffold has conductive and degradable functions, can guide nerve regeneration, and greatly promotes functional recovery of nerve injury areas.

The invention relates to a novel instrument displacement transform amplifier with a central shaft and a flexible cord for transmission. The instrument displacement transform amplifier comprises a central shaft, a connecting flexible cord, a transmission shaft, a balance spring, upper and lower clamping plates and a limiting device, and is characterized in that a groove is arranged on the central shaft; part of the flexible cord is wound into the groove of the central shaft; and the transmission shaft can drive the flexible cord to enable the central shaft to rotate to transform and amplify the displacement. The instrument displacement transform amplifier has the advantages that since the diameter of the central shaft can be changed to be quite small and the front end of the transmission shaft can be relatively extended, the core of the instrument displacement transform amplifier has high amplification factor. Due to the flexible cord, constant friction caused by occlusion of the gears can be reduced, so the service life can be longer. The instrument displacement transform amplifier can also take a bearing as the support piece through the central shaft, so friction can be reduced and the precision can be high. Meanwhile, the instrument displacement transform amplifier is shock-resistant and has a plurality of other advantages.

The invention discloses a DNA synthesis sequencing method and a DNA synthesis sequencing system. The method comprises the following steps: connecting a primer P1 to the surface of a matrix through a water-soluble bifunctional linking unit; adding a solution containing a DNA template to be detected onto the surface of the matrix, and carrying out isothermal surface amplification reaction; adding aprimer Pe to the surface of the matrix, adding an extension reaction solution containing fluorescence labeling reversible terminators of four basic groups onto the surface of the matrix, and carryingout extension reaction; carrying out imaging on DNA double strands after extension, and adding a corresponding chemical reagent, so that the linking units of the fluorescence labeling reversible terminators break; and repeating the steps of DNA chain extension and breakage, and completing a plurality of times of cycle sequencing, thus obtaining the base sequence of nucleotide of the DNA template to be detected. The sequencing method provided by the invention can be used for DNA high-throughput synthesis sequencing, according to the experimental result, under the sequencing condition, the readlength of sequence is at least 73 base groups, if double-end sequencing is adopted, the read length is at least 146, and the accuracy rate is at least 99.98%.

The present invention relates to a multifunctional ecological tree pool module. The tree pool module comprises a centrally located tree planting area, and a ground cover plant growing area surroundingthe tree planting area, wherein the ground cover plant growing area has a smooth downward slope from the center to the periphery, the ground cover plant growing area is provided with a plurality of irrigation channels outwardly and radially diffused in the slope direction, and water seepage holes are arranged in the irrigation channels, wherein the high ends of the irrigation channels are converged to form a gutter that connects to an external water pipe, and the lower ends form a gutter that communicates to the outside at the edge of the tree pool module. Compared with the prior art, the multifunctional ecological tree pool module of the invention has the characteristics of uniform irrigation, convenient maintenance and low energy consumption in vegetation irrigation, and reduces the operation cost of the garden; and growth of trees in the tree pool module is also promoted, the grasp force of trees to the tree pools is strong, and a more comfortable garden environment can be created.

The invention discloses an elevator movable rope head assembly. The elevator movable rope head assembly comprises a lifting ring, a spring box and a wedge sleeve, wherein the lifting ring and the wedge sleeve are connected by a pull rod, one end of the pull rod penetrates through the lifting ring, and the other end of the pulling rod is embedded in the wedge sleeve; the spring box is fixedly arranged in the center of the pull rod, and the pull rod penetrates through the spring box; the lifting ring includes a base and a pull ring, and two ends of the pull ring are fixedly connected to the twosides of the base; the spring box includes a spring, a nut, a sleeve and a fixed block, the pull rod is sleeved with the sleeve, the fixed block is fixedly arranged on the outer side of the pull rod,and the pull rod is arranged on the fixed block in a penetrating mode; and wedge sleeve pieces are arranged on both sides of the connecting positions between and the pull rod and the top end of the wedge sleeve, and a hinge penetrates through the wedge sleeve pieces and the pull rod. The elevator movable rope head assembly is safer in connection, and the wedge sleeve and the lifting ring both canmove by 180 degrees, buffering is facilitated, the torque is reduced, and when in use, the elevator movable rope head assembly is more adaptable to the change of direction of elevator operation.

The invention discloses a printed circuit board with blind holes and a processing method of the printed circuit board. The printed circuit board comprises an upper copper foil layer, a base material layer, an epoxy resin glue film layer and a copper foil layer for foiling, wherein the upper copper foil layer is arranged on the upper surface of the base material layer; the epoxy resin glue film layer is arranged on the lower surface of the base material layer; the copper foil layer for foiling is arranged on the lower surface of the epoxy resin glue film layer; and blind holes are formed in the upper copper foil layer, the base material layer and the epoxy resin glue film layer. According to the printed circuit board, the diameters and the depths of the blind holes can be arbitrarily combined; the diameters can be realized by selecting the size of a drill pin; the depths can be realized by selecting printed circuit substrates with different thicknesses; the printed circuit board is free of a glue residue, upright in hole pattern, simple in design and easy to process; and the design of the product has large extension, so that the functional diversity of the product can be realized.

The invention relates to a gas propelled slot forming perforation process. The prior perforating gun body is adopted, and a bullet 89 or a bullet 102 or a bullet 127 is adopted. A sleeve type propellant grain is fixed and sleeved around the gun body which is conveyed to a downhole target stratum through an oil pipe or a cable. The bullet in the gun body is detonated through bar dropping or electrification. The detonated bullet produces strong metal flow which enters the stratum after passing through the side wall of the gun body and the sleeve type propellant grain. When the bullet passes through the sleeve type propellant grain, hot metallic particles produced by the bullet simultaneously ignites the sleeve type propellant grain around the gun body; the burning grain produces a great amount of high-temperature high-pressure gas which enters the stratum and flushes strongly the eyelets produced by the metal flow of the bullet again; thus, compressive fractures as well as a plurality of radial cracks are produced in the stratum. The process has the advantages of simple process, convenient operation, integral perforation and compressive fracture, good compressive fracture effect, good safety, high reliability and low cost. The process is suitable for being popularized in oil fields.

The invention relates to a graphene heat dissipation coating and graphene heat dissipation material for an aluminum electrolytic capacitor, and preparation methods thereof. The graphene heat dissipation coating for the aluminum electrolytic capacitor disclosed in the invention comprises a bottom-layer graphene heat dissipation coating and a surface-layer graphene heat dissipation coating, whereinthe bottom-layer graphene heat dissipation coating comprises, in percentage by weight, 30 to 65% of polyester resin, 0.5 to 10% of modified graphene oxide powder, 1 to 5% of a coupling agent, 5 to 15%of silicon carbide, 0.5 to 5% of a rheological agent, 0.1 to 2% of a dispersing agent and 10 to 45% of a solvent; and the surface graphene heat dissipation coating comprises, in percentage by weight,30-65% of epoxy resin, 0.5-10% of modified graphene oxide powder, 1-5% of a coupling agent, 5-15% of silicon carbide, 0.5-5% of a rheological agent, 0.1-2% of a dispersing agent and 10-45% of a solvent. According to the graphene heat dissipation coating for the aluminum electrolytic capacitor, a coating scattering material has excellent heat dissipation performance and stable performance, and heat dissipation capacity is greatly improved in a later period that the aluminum electrolytic capacitor is coated with the heat dissipation coating.

The present invention provides a conductive composition capable of forming fine electrode patterns. In a predetermined binder resin (10), a conductive material (2) and a conductive material (3) having a particle diameter smaller than the conductive material (2) are contained, and the binder resin (10) also contains a An additive (4) of metal nanoparticles finer than the above-mentioned conductive material (3). The metal nanoparticles are filled in the gap 5 formed by the conductive material (2) and the conductive material (3), and when heated and hardened, the metal nanoparticles increase or precipitate, increasing the strength of the conductive materials (2), (3). The metal filling rate in the void (5) formed by each particle can be reduced, thereby reducing the resistivity.