189results about How to "Disperse in time" patented technology

The invention discloses an environmental ceramic base friction material free of copper or metal and a preparation method of the material. The environmental ceramic base friction material is characterized by comprising the following components by weight percent: 6-12% of phenolic resin, 2-10% of ceramic fiber, 2-8% of inorganic fiber, 2-10% of rubber, 4-12% of graphite, 10-25% of potassium titanate lamella, 3-15% of mineral fiber, 4-20% of metal sulfur compound, 6-20% of grinding aid and 5-20% of filler. The prepared friction material has excellent friction and wear properties, high heat-conducting property, excellent high-temperature decline property, stable friction coefficient, and excellent noise performance.

The present invention discloses an ultrasonic therapeutic head which comprises a casing (1). An ultrasonic transducer (4) is provided in the casing. One opening is provided on one end of casing (1) and is closed by an energy guiding window (2). The ultrasonic transmitted from the ultrasonic transducer (4) is transmitted to outside through the energy guiding window (2), wherein, an air inlet opening (12) and an air outlet opening (11) are provided on the casing. The cavity between the air inlet opening and the air outlet opening forms a cooling cavity. The heat generated in the operation of ultrasonic transducer (4) is discharged from the air outlet opening (11) after passing through the cooling cavity. The ultrasonic therapeutic head can guarantee the in-time dissipation of heat generated by ultrasonic transducer without using circulating liquid as coolant. The thermal burn of patient generated by the heat that is generated in the operation of ultrasonic transducer can be prevented. Furthermore the normal use of ultrasonic transducer in a long time can be guaranteed.

The invention discloses a method for obtaining a large-hole-diameter double-through-hole AAO membrane. The method comprises the following steps that 1, aluminum foil is pretreated, and thus aluminum foil with the surface being as smooth and flat as a mirror is obtained; 2, a large-hole-diameter single-through-hole AAO membrane with an aluminum base and a blocking layer is prepared through a secondary anodic oxidation method, wherein an anodic oxidation electrolyte is a mixed solution of phosphoric acid (with the content being 0.05 M-0.2 M) and sodium oxalate (with the content being 0.01 M-0.03 M); and 3, the aluminum base and the blocking layer of the large-hole-diameter single-through-hole AAO membrane are removed through a corrosion stripping method, wherein aluminum base corrosive liquid is a mixed solution of copper chloride (with the content being 0.1 M-0.15 M) and ferric chloride (with the content being 0.15 M-0.18 M). The method has the advantage that the double-through-hole AAO membrane which is large in hole diameter, orderly in hole arrangement, large in area and good in integrality is obtained.

The dispersed tablet of proton pump inhibitor is used for treating gastric ulcer, duodenal ulcer, stomal ulcer and other indications. It contains at least one kind of proton pump inhibitor and at least one kind of biologically acceptable buffering agent in the weight ratio of 1 to 10-200. The proton pump inhibitor is one selected from omeprazole, S-omeprazole, pantoprazole, lansoprazole, rabeprazole, leminoprazole, tenatoprazole and their salts. The biologically acceptable buffering agent is sodium bicarbonate, sodium carbonate, magnesium carbonate, etc or their mixture.

The invention relates to an axial-segmented solid permanent-magnet rotor, belonging to the technical field of motors. The axial-segmented solid permanent-magnet rotor is used for solving the problem that permanent magnets are subjected to irreversible demagnetization due to too-high temperature due to the fact that the existing solid rotor of a permanent-magnet motor can not be subjected to good ventilation. The axial-segmented solid permanent-magnet rotor comprises a rotary shaft, a magnetism isolating ring, a plurality of permanent magnets, a plurality of permanent magnet slot wedges, a plurality of starting cage strips, two cage strip end rings, two axial rotor segments and an air guide portion, wherein the permanent magnets, the permanent magnet slot wedges and the starting cage strips are the same in number, the two axial rotor segments are same in structure, the magnetism isolating ring is sleeved on the external circular surface of the rotary shaft, the two axial rotor segments are sleeved on the external circular surface of the magnetism isolating ring along the axial direction and connected together through the air guide portion, each axial rotor segment is equally divided into a plurality of circumferential rotor segments along the circumferential direction, and a permanent magnet slot is formed between every two adjacent circumferential rotor segments along the circumferential direction. The axial-segmented solid permanent-magnet rotor is suitable for motor solid rotors.

The invention relates to an LED backlight integrating encapsulation structure and encapsulation method. The encapsulation structure comprises a substrate (1) and a reflecting layer (6) arranged on the substrate (1), wherein a light-guiding diffusion plate (7) and a prism plate (8) are arranged on the substrate (1) successively provided with the reflecting layer (6) from bottom to up. The encapsulation structure is characterized in that LED blue dies are arranged on the substrate (1) in an array mode. The encapsulation method comprises the following steps: embedding the LED blue dies, coating solder paste on high conductivity substrate material, bonding dies through reflow soldering, fixing the LED blue dies on the substrate, and adopting ultrasonic wire bonding technology to connect the LED and a circuit board. The LED blue dies are covered with yellow fluorescent powder and epoxy resin and the reflecting layer is plated on the heat-conducting substrate so that the luminous efficiency and heat dissipation effect of the LED are increased and the rays are parallel and uniform. The encapsulation method is used to reduce power consumption, increase luminous efficiency, prolong the life of the device and save energy. The volume of the encapsulation structure is reduced and the backplane becomes lighter and thinner.

The invention relates to a purification adsorbent for removing impurities in polymerized olefin materials prepared from coal through methyl alcohol. The purification adsorbent for hydrocarbon impurities is prepared from, by weight, 20%-59.5% of molecular sieves, 0.5%-1% of metallic oxide and 40%-64% of activated aluminum oxide, wherein the molecular sieves are composite molecular sieves, and are prepared in the mode that an SAPO molecular sieve or SSZ molecular sieve and one or more of a A-type molecular sieve, X-type molecular sieve and Y-type molecular sieve are mixed. Compared with the prior art, the adsorbent prepared with the method is high in particle mechanical strength, small in dust and low in adsorption heat effect, has the deep adsorption function, and can be used for removing impurities such as water, carbon dioxide, hydrogen sulfide, methyl alcohol, ethyl alcohol, formaldehyde, acetaldehyde, mercaptan and dimethyl ether in the polymerized olefin materials prepared from the coal through the methyl alcohol.

The invention discloses an unmanned aerial vehicle, a battery module and a charge-discharge control method. The battery module comprises a battery body, an outer case, a heat conducting assembly, a first heating piece, a second heating piece, a temperature sensor and a control assembly, wherein the battery body is arranged in the outer case; the heat conducting assembly is connected between the outer case and the battery body in a heat conducting manner; the first heating piece is used for heating the battery body; the second heating piece is used for heating the heat conducting assembly; the temperature sensor is used for detecting temperature of the battery body and producing a temperature signal according to the detected temperature of the battery body; the control assembly is electrically connected with the first heating piece, the second heating piece and the temperature sensor and used for receiving the temperature signal and controlling the first heating piece and the second heating piece according to the temperature signal. According to the battery module, normal charge and discharge of the battery module can be guaranteed, charge-discharge performance of the battery module can be improved, and heat produced by the battery body can be dissipated effectively and rapidly in time.

The invention discloses an embedded-copper-block printed circuit board, comprising a top wire layer, a prepreg layer and a bottom wire layer which are arranged in sequence; the bottom wire layer is provided with a receiving cavity; a radiating copper block is arranged in the receiving cavity; the top wire layer is provided with blind holes; the bottoms of the blind holes are connected with the radiating copper block. The radiating copper block is embedded in the circuit board, the top wire layer is connected with the radiating copper block via the blind holes, and a device may be welded directly to the laser blind holes and the radiating copper block such that a radiating substrate has greatly improved radiating and heat-conducting effects; the printed circuit board is applicable to heat dissipation for high-power devices; the printed circuit board is connected with the radiating copper block via the blind holes so that heat of the high-power devices may be dissipated in time, and thestability and reliability of the high-power devices are improved. The invention also discloses a method of manufacturing the embedded-copper-block printed circuit board. The manufacturing method is simple, the conditions are mild, and the manufactured printed circuit board has good radiating effect and good structural stability and rarely cracks.

The invention provides a metal wire polishing wheel. The metal wire polishing wheel comprises an upper clamping plate and a lower clamping plate. A plurality of metal wire beams are installed between the edge parts of the upper clamping plate and the lower clamping plate in a central symmetrical mode. A fastener is installed between through holes of the upper clamping plate and the lower clamping plate. A longitudinal installation hole is formed in the middle of the fastener and internally provided with an internal thread. Both the upper clamping plate and the lower clamping plate are divided into the annular sunk parts in the middles and the annular protruding parts at the edges. The annular protruding part of the upper clamping plate and the annular protruding part of the lower clamping plate are symmetrical and form an annular installation groove of the metal wire beams. The metal wire beams are formed by twisting a plurality of metal wires made from an aluminum alloy composite material. The aluminum alloy composite material comprises an aluminum alloy substrate and a ceramic layer arranged on the surface of the aluminum alloy substrate through laser cladding. The metal wire polishing wheel is compact and firm in structure, convenient to install and use and good in thermal conductivity, heat dispersion, mechanical property and usability.

The invention discloses a flowing boiling micro-miniature heat exchanger, which comprises a heat exchanger casing, a heat exchange structure passage, an inlet passage and an outlet passage, wherein the heat exchange structure passage is arranged in the heat exchanger casing; and the inlet passage and the outlet passage are arranged at the two ends of the heat exchange structure passage. The flowing boiling micro-miniature heat exchanger is characterized in that the inlet passage consists of a condensing medium input opening, a flow storage pool and an inlet flow division passage; the flow storage pool is connected between the condensing medium input opening and the inlet flow division passage; the outlet passage consists of a condensing medium output opening and an outlet flow division passage; a micro rib column group and support columns are arranged in the heat exchange structure passage; the micro rib column group consists of micro rib columns; the cross section dimension of the micro rib columns conforms to the fractal Brownian motion features; the micro rib columns are in planar distribution; the height of the micro rib columns meets the normal distribution; and the support columns are distributed in the center of the micro rib column group in an array mode. The flowing boiling micro-miniature heat exchanger has the advantages that the heat transfer efficiency is high; the flowing resistance loss is small; the surface temperature of the heat exchanger is uniform; the work is stable; and the service life is long.

The invention provides a mixed storage backup method and system based on an HDD and an SSD, and relates to the technical field of computer application. The method includes the following steps that linear address space of the single HDD or multiple HDDs is divided into a plurality of parts, each part comprises a data section and an idle section, and if a writing request reaches, data are written into the corresponding data section according to a preset strategy through the HDD. According to the mixed storage backup method and system, the data on the SSD can be backed up in time through the HDD, and the mixture structure achieves reliable storage system data backup which is low in price and high in performance.

The invention provides food producing equipment. The equipment comprises a casing, a food producing chamber arranged in the casing and an air inducing device arranged on the outer side of the upper side of the food producing chamber, wherein the air inducing device comprises an air inducing hood and an air inducing device, an air inducing port is formed in the top of the air inducing cover, and the air inducing device forces air to penetrate through the air inducing port to flow into the air inducing hood; an upper air inlet is arranged at the top of the casing, and air flows into the casing from the upper air inlet and penetrates through the air inducing port to flow into the air inducing hood to form main cooling airflow; the casing comprises side walls and a bottom wall, and an interlayer is arranged between each side wall and the food producing chamber; a lower air inlet is arranged on the bottom wall, and air flows into the interlayer from the lower air inlet, flows upwards slowlyalong the interlayer and penetrates through the air inducing port to flow into the air inducing hood to form auxiliary cooling airflow. The equipment can effectively discharge harmful heat in the casing and reduces the discharge rate of heat in the food producing chamber.

The invention relates to doped large-particle cobalt carbonate and a preparation method thereof. The large-particle cobalt carbonate is doped with metal elements, primary particles are conical in morphology and form spherical secondary particles, and the particle size distribution range of the secondary particles is that (D90-D10) / D50 is larger than or equal to 0.3 and smaller than or equal to 0.5; and the preparation method comprises the following steps: nucleation, concentration, growth in a seed crystal kettle, and growth of the seed crystal in different kettles. The doped large-particle cobalt carbonate is high in crystallinity, beneficial to uniform distribution of doped element aluminum, high in tap density, narrow in particle size distribution and beneficial to reduction of aluminum segregation of small particles; and according to the preparation method, the D50 rising speed and the solid content rising speed are strictly controlled, uniform growth of cobalt carbonate particles is guaranteed by adjusting the flow and the rotating speed in different solid content intervals, the concentration process greatly saves the standing waiting time, the efficiency is high, and the obtained product is good in performance and has a wide market prospect.

The invention relates to an air guiding cover which comprises a top wall, two side walls and a shielding component, wherein the two side walls are connected at the two sides of the top wall, and the shielding component is arranged on the top wall. A ventilating duct through which air current passes is surrounded by the top wall and the two side walls. The air guiding cover comprises an air inlet, a first air outlet and a second air outlet, wherein the air inlet and the first air outlet are arranged at the two opposite ends of the ventilating duct; and the second air outlet is arranged on the top wall and is opposite to the air inlet. The shielding component is used for selectively shielding or opening the second air outlet. When the shielding component is opened by using the shielding component, air current flowing into the air inlet flows towards one end of the air guiding cover far away from the air inlet from the first air outlet and the second air outlet. The invention also relates to a heat dissipation system with the air guiding cover.

The invention belongs to the field of electric vehicle arranging, and provides an electric vehicle arranging structure which ingeniously solves the problems that battery arranging is hard, temperature is not even, the battery can easily catch a fire when being collided, the whole vehicle is not reasonable in arrangement, and cost is high. A battery pack (2) is arranged in a center channel (3) in the front-back longitudinal direction of a whole vehicle (1), movable joints (5) are arranged between battery pack bodies (4), and a gear switch (6), a hand brake (7), an emergency stop switch (8) and a balancing, temperature-controlling and liquid level display device of the battery pack (2) are arranged on the center channel (3). The two ends of the battery pack (2) are respectively provided with an electric control part (19), a direct-current convertor (20) and a mechanical buffer (21). The electric vehicle arranging structure is used for electric sightseeing vehicle, scooters, cars and the like, the whole vehicle is compact in arrangement, and a large space is saved; the axle load ratio can be easily adjusted; battery temperatures are consistent, and batteries are more safe when being collided; cost of the vehicle body and wiring harnesses is lowered; starting driving force is strong, and steering is flexible; electric energy can be saved when the vehicle passes through an uneven road face; the electric vehicle arranging structure is scientific, convenient to operate and more attractive.

The invention discloses a method for placing waste concrete and sealing and storing carbon dioxide in an old abandoned mine shaft. The method comprises the following steps that A, saturated lime wateris injected into a coal bed gas pumping pipe of the old abandoned mine shaft in a pulsing mode; B, saturated lime water is injected to a goaf of the mine shaft in a pulsing mode; C-D, the waste concrete is conveyed into a hopper, and the hopper conducts particle size sieving of the waste concrete by vibrating of a vibrator; E-G, then the sieved waste concrete is conveyed into the goaf of the mineshaft in batches, and meanwhile, the saturated lime water makes the waste concrete to be distributed more widely in the goaf, and then the injected amount of the waste concrete is controlled; and H-I, carbon dioxide gas is injected to the goaf of the mine shaft for storage, and then ground drilled well is sealed. According to the method for placing the waste concrete and sealing and storing the carbon dioxide in the old abandoned mine shaft, the goaf of the abandoned mine shaft is filled with the waste concrete, and meanwhile, the carbon dioxide gas is injected to the goaf of the mine shaft,so that the problems of placing of the waste concrete, filling of the abandoned mine shaft and sealing and storing of the carbon dioxide are solved, and land pollution and the atmospheric greenhouse effect are reduced.

The invention discloses a full-automatic laser carving machine for straps. The full-automatic laser carving machine for the straps comprises a machine body, a carving head, an X shaft and a feeding mechanism. The feeding mechanism is arranged on the machine body and comprises a bottom plate, a guide plate, a driving feeding shaft, a driven feeding shaft and a driving portion, wherein the guide plate is perpendicularly arranged on the bottom plate which is connected with the machine body, the driving feeding shaft and the driven feeding shaft are abreast mounted at the front end of the guide plate vertically, and the driving portion is in transmission connection with the driving feeding shaft. The guide plate is provided with a feeding port, the back of the guide plate is provided with a plurality of conveniently-adjustable guide limiting positions at the feeding port, and a guide port is formed between each two guide limiting positions. The driving feeding shaft is provided with a limiting outlet in the feeding direction, a supporting bar for auxiliary supporting of materials is arranged at the front end of the limiting outlet, and the carving head is arranged above a gap position between the limiting outlet and the supporting bar. The full-automatic laser carving machine for the straps has the advantages of simplicity in operation, high in jumping speed and acceleration, improvement of machining precision, guarantee of product yield, reduction of consumption, improvement of production efficiency and saving of manpower and material resources.

The invention discloses a support base for an industrial robot. The support base comprises a base, a supporting seat and a top seat, wherein waist-shaped holes are formed in the two sides and two endsof the outer bottom end of the base, pressing plates are installed at the top end of the base through bolted connection, and a controller is installed on one side of the outer wall of the base through bolted connection; and shock absorbing springs are installed at the bottom end of interior of the base, the supporting seat is installed at the other ends of the shock absorbing springs, heat dissipation boxes are installed on the outer wall of the supporting seat, heat dissipation fans are installed in the heat dissipation boxes, and a motor is installed at the bottom end of the interior of thesupporting seat through bolted connection. According to the support base for the industrial robot, a driving gear is installed at the output end of the bidirectional motor, the top seat is installedat the top end of the inner wall of the supporting seat through bearings, mounting holes are formed in the top seat, a gear groove is formed in the middle of the bottom end of the top seat, and the gear groove and the driving gear are matched with each other, and thus the advantages that the industrial robot can rotate freely and is convenient to operate in different directions are realized.

The invention discloses an active infrared camera. The active infrared camera comprises a visible light camera, an RJ45 interface, a processor with a video encoding and decoding circuit integrated therein, an infrared optical camera and an infrared emission light source, wherein the infrared emission light source comprises multiple infrared lamp beads and a lamp base coaxially arranged on the infrared optical camera; the infrared lamp beads are symmetrically arranged on the lamp base; the digital output end of the infrared optical camera is connected with the digital signal input end of the processor; the video signal output end of the visible light camera is connected with the video signal input end of the processor; the communication signal end of the processor is connected with the RJ45 interface; and the RJ45 interface is connected with a router through a network line. By using the active infrared camera, data acquisition can be provided for forest fire prevention monitoring around the clock in all regions for 7*24 hours in a high-quality and multi-application mode finally.

The invention discloses a heat dissipation type automobile brake disc, which comprises a disc body and a connecting disc, the disc body includes a first disc body and a second disc body, the first disc body and the second disc body are connected through a cylinder, the first disc body A connecting plate is connected to the top, and the connecting plate is provided with a shaft hole. The top surface of the connecting plate is provided with a plurality of installation holes. There are multiple S-shaped cooling plates connected between the first plate body and the second plate body. It is evenly arranged in the circumferential direction, and the cavity between adjacent cooling plates forms a flow guide channel. There are multiple cross-shaped dust removal grooves on the first plate and the second plate, and the first plate and the second plate The plurality of dust removal grooves on the top are evenly arranged in the circumferential direction, and the first plate body is also provided with a plurality of first heat dissipation holes, and the first heat dissipation holes communicate with the flow guide channel. The brake disc of the invention can quickly dissipate the heat generated during braking, slow down the temperature rise rate of the brake system during braking, delay the generation of heat decay, and improve the service life of the brake disc.

The invention discloses an Internet of Things function detection device for an Internet of Things household appliance. The material net detector comprises a material net detector body, a bottom plate and a central processing system, protective plates are fixedly connected to the two sides of the top of the bottom plate; a fixing plate is fixedly connected between the opposite sides of the protection plates; the top of the fixing plate is fixedly connected with a heat conducting plate; the top of the heat conduction plate is fixedly connected with the bottom of the Internet of Things detector body, the bottom of the fixing plate is fixedly connected with a fixing frame, the bottom of the fixing frame is fixedly connected with cooling fins, and the bottom of the inner wall of the fixing frame is fixedly connected with a refrigerator. According to the Internet of Things function detection device for the Internet of Things household electrical appliance, heat generated by the Internet of Things detector during working can be dissipated in time, meanwhile, certain resources are saved through cyclic utilization of heat conduction oil, certain economic cost is reduced, and follow-up household electrical appliance detection work can be normally carried out.

The invention provides a heavy oil suspended bed hydrogenation method under a near clinical water condition. The method comprises the following steps of: making a mixture of heavy oil raw materials and water contacted with a hydrogenation catalyst in the presence of hydrogen gas to perform a hydrogenated reaction, wherein the reaction temperature is between 300 and 450 DEG C, and the reaction pressure is 6 to 20 MPa; and separating the reaction products to obtain the liquid distillates. In the method, the special action of the near clinical water integrates the hydrogenation characteristics of the catalyst, and on a basis of keeping a higher residue-to-oil conversion rate, the coke formation is inhibited to a maximum degree, and the yield of light oil is improved.

The invention belongs to the field of home use electric appliances, and particularly relates to an intelligent electric mosquito coil device. The intelligent electric mosquito coil device is characterized by comprising an intelligent controller with a main control action; the intelligent controller is connected with an infrared sensor for detecting whether people exist in the ambient environment; the intelligent electric mosquito coil device comprises a concentration sensor arranged on the electric mosquito coil device and used for detecting concentration of ambient sensitive gas; the concentration sensor is connected with the intelligent controller connected with a heating controller; the heating controller is connected with an electric heater. The intelligent electric mosquito coil device can be started for killing mosquitoes under an unmanned condition, and the power of the electric heater can be automatically reduced under the condition of existence of people, so the concentration of sensitive gas in air is reduced, the time of people positioned in the high-concentration sensitive gas is reduced and body health of people is facilitated.

The invention relates to an automobile part, in particular to an automotive brake flange. The automotive brake disc comprises a first brake disc, a second brake disc and a brake hub, the first brake disc and the second brake disc are both circular brake discs and are placed vertically and fixedly connected together through a plurality of strip ribbed plates, the axis of each of the first brake disc and the second brake disc is provided with a center hole with the diameter larger than that of the brake hub, the brake hub is fixedly connected with the first brake disc and the second brake disc through a plurality of fixing ribs, and the brake hub, first brake disc and the second brake disc are coaxial. The automotive brake flange has the advantages that heat radiation effects of the brake flange in use are improved, heat generated by friction of the brake flange can be timely radiated, temperature distortion of the brake flange due to excessive frictional heat is avoided, and accordingly service life of the brake flange is prolonged.

The invention discloses a safety composite type brake drum with a rapid heat dissipation and anti-burst. The safety composite type brake drum with the rapid heat dissipation and anti-burst comprises a brake drum shell. The brake drum shell is provided with an inner cavity. The brake drum shell comprises a main body part, a connecting part and an installing part, wherein the main body part, the connecting part and the installing part are sequentially connected in an integrated mode. Multiple reinforcing ribs are arranged at intervals on the outer ring wall surface of the main body part in an outward protruding mode. Each reinforcing rib extends in the axial direction, and each reinforcing rib is provided with a wind-proof surface. Air inlets are formed in the joints of the wind-proof surfaces and the outer ring wall surface of the main body part, and the connecting part is provided with air outlets. Accordingly, on one hand, the reinforcing ribs have the structural strengthening effect on safety composite type brake drum, on the other hand, the heat dissipation area is increased, and the heat dissipation effect is improved. Meanwhile, the wind-proof effect can be achieved, air can be driven to form airflow, the airflow flows into the inner cavity, and the heat in the inner cavity is driven out from the air outlets by utilizing the airflow. Therefore the timely heat dissipation or discharge can be achieved, the brake performance of the brake drum can be guaranteed, the burst phenomenon of the brake drum can be prevented, the service life of a product is prolonged, and the potential danger is prevented.

The invention relates to a self-lubricating bearing technique, and in particular to a laser microtexturing self-lubricating method for a variable-pitch / yaw bearing in a wind turbine generator system.Laser microtexturing is carried out on the inner raceway surface of an outer ring, the outer raceway surface of an inner ring and the surfaces of balls in the bearing, a die hot-pressing solidification filling method is utilized to fill a solid lubricating material to form a self-lubricating structure, so that the initial roughness between the balls, the inner raceway and the outer raceway in thebearing, and thereby the service life of the wind turbine generator system can be effectively prolonged.

The invention discloses a laminar composite SiC / graphite film material for thermal management and a preparation method thereof. The composite material is prepared from, by volume, 10-50% of a reinforced SiC phase and 50-90% of a graphite film matrix phase, wherein graphite films and SiC are alternately distributed in the composite material layer by layer and show perfect directional arrangement. The preparation method of the composite material comprises the four steps of coating the surface of each graphite film with a SiC ceramic layer, stacking the graphite films coated with the SiC ceramiclayers on the surfaces layer by layer for pre-pressing and shaping, performing vacuum hot-pressing sintering on a pre-shaped sample, and performing subsequent treatment on the sintered sample. The preparation method effectively solves the problems that it is difficult to conduct sintering densification on a traditional composite SiC / graphite material and the interface bonding strength between SiCand graphite is low. The laminar composite SiC / graphite film material prepared by the method not only has high thermal conductivity in a direction parallel to a lamination direction but also can obtain a thermal expansion coefficient matched with a packaging substrate in a direction perpendicular to the lamination direction. Meanwhile, the material is low in density and high in strength and servesas a novel thermal management material with a great application prospect.

The present invention discloses a compression-resistant and wear-resistant coaxial cable. The coaxial cable comprises a rubber protective sleeve, a wear-resistant layer, wire cores and cable center bodies. One end of the inside of the rubber protective sleeve is provided with an external insulation layer, and the central location of the inside of the rubber protective sleeve is provided with the cable center bodies uniformly. The wire cores are uniformly arranged between the cable center bodies and the external insulation layer. The outside of each wire core is provided with a protective sleeve, the central location of the inside of each wire core is provided with conductors, and the outside of each conductor is provided with an internal crust. The other end of the inside of the rubber protective sleeve is provided with the wear-resistant layer, and a metal mesh layer is arranged between the wear-resistant layer and a buffer layer. According to the coaxial cable, by providing the buffer layer, a damping spring and reset springs uniformly arranged at the outside of each conductor, even if the coaxial cable is deformed under an external force, the coaxial cable can restore to the original state quickly after the external force is disappeared, and thus the cable can not be damaged.

The invention discloses a river aeration membrane module, an aeration membrane system and a method, and belongs to the field of sewage treatment. The river aeration membrane module comprises an aeration pipeline and a hollow braided biomembrane, the hollow braided biomembrane comprises hollow membrane tubes and micro-porous chemical fiber membrane wires, and the aeration pipeline is communicated with one ends of the hollow membrane tubes; and the other ends of the hollow membrane tubes are closed, the tube wall every tube is provided with a plurality of pores, and the micro-porous chemical fiber membrane wires are connected around the pores. The hollow membrane tubes with pores are adopted as the aeration module, and are combined with the micro-porous chemical fiber membrane wires arrangedaround the pores, so the oxygen absorption capacity is increased, the dissolved oxygen content of water is increased, and the biomembrane can be updated fast and has a short sludge age, thereby the membrane module has high bioactivity, effectively promote biomembrane formation to achieve a short biomembrane formation time, and effectively improves the sewage treatment effect.