52results about How to "Eligible for use" patented technology

This invention relates to production process of pucherite yellow ceramic pigment, which takes sodium silicate as raw material to coat silicon dioxide. It takes sodium silicate as silicon source, coat silicon dioxide on surface of pucherite. For the strong inertia of silicon dioxide, it be able to withstand 1000 deg high temperature, and keep bright-colored after annealing of 1000 deg. This invention can eliminate harm to human body and pollution to environment in the process of production, solve the problem of heavy metal content are overproof in the export ceramic product of our country.

The invention provides a brain-computer interface based doctor-patient interaction method, which adopts a brain-computer interface based doctor-patient interaction system comprising an electroencephalographic collection module and an electroencephalographic analysis and doctor-patient interaction module. The method comprises the following steps of: setting visual stimulation signals with different frequencies, displaying the signals on a display, and mapping into controls of four commands through different combined codes (00, 01, 10 and 11) of 0 and 1; collecting an electroencephalographic signal of a subject by an electrode in real time, sending into a computer after the signal is amplified; analyzing the electroencephalographic signal; and broadcasting a voice prompt corresponding to the identification result through a speaker, and displaying the result on the display. Therefore, medical staff can carry out corresponding rescue according to the display and voice. The brain state can be identified by the brain-computer interface technology, and external equipment is accurately driven in time, so that communication and control can be realized. Brain can be effectively excited to generate steady state visual evoked potential by visual stimulations in different frequencies, the electroencephalographic signal can be accurately identified under stimulations in different frequencies through signal calculation and processing functions of the computer, and real doctor-patient interaction can be realized in the result display and voice prompt mode.

The invention provides a method for evaluating a creep-fatigue life. The method comprises the steps of performing finite element calculation till a total strain for each state point of an examination point is stable, wherein a load cycle when the total strain is stable is the cycle n; based on a monoaxial equal strain relaxation model and in combination with a multiaxial correction coefficient M, calculating a stress of the examination point till the cycle n, wherein the M is adjusted continuously so that a calculated stress course is consistent with the stress course calculated out in the step (a) to obtain the optimal multiaxial correction coefficient M; calculating a stress relaxation course of the examination point after n cycles by employing the optimal multiaxial correction coefficient M and based on the monoaxial equal strain relaxation model till stress relaxation for each state point of the examination point is stable, wherein the load cycle when the stress relaxation is stable is the cycle k; calculating a creep damage in previous k load cycles and the creep damage for the load cycle k; calculating a fatigue damage in previous n load cycles and the fatigue damage for the load cycle n; and thereby calculating the creep-fatigue life.

The invention discloses a high alloy matrix metal-ceramic composite and a preparation method thereof, and belongs to the field of wear-resistant materials. According to the high alloy matrix metal-ceramic composite, the volume ratio of high alloy matrix materials to metal-ceramic reinforced particles is (1-10):1; the high alloy matrix materials comprise 1-8% of C, main alloying elements, minor additive elements and the balance Fe and unavoidable impurities; the main alloying elements comprise 0-60%of Ni, 0-60% of Mo, 0-40% of Cr, 0-30% of Mn, 0-20% of V, 0-20% of Ti, 0-15% of W and 0-15% of Nb; and the minor additive elements are one or more of B, Si, Zr, Cu, Co, Al and rare earth. The preparation method adopts a programmed temperature-controlled liquid phase sintering method for preparation and can be used directly for wear-resisting materials, or for wear-resisting materials after subsequent heat treatment; and the metallurgical bonding interface between the reinforced phase and thehigh alloy matrix in the composite reaches 40[mu]m-1mm, no cracks occurs after the integral heat treatment, and the service conditions in the wear-resistant material field are met.

The invention relates to an automatic spraying line for a golf club head. The automatic spraying line comprises spraying equipment and conveying equipment, wherein at least one spraying equipment is arranged along the conveying equipment; the conveying equipment is annually arranged and penetrates through at least one spraying equipment; the spraying equipment comprises a water curtain cabinet, asupporting portal frame and a multi-shaft robot, the supporting portal frame and the multi-shaft robot are covered with the water curtain cabinet, the multi-shaft robot is arranged on the supporting portal frame in an upside down manner, and a spraying gun is arranged on the multi-shaft robot; and the conveying equipment comprises a conveying mechanism and a plurality of club head tool assemblies,the conveying mechanism comprises a conveying strip and a conveying driving assembly, the conveying belt is annularly arranged, the conveying driving assembly is used for driving the conveying stripto work, the conveying strip penetrates through the water curtain cabinet through a conveying opening in the water curtain cabinet, the multi-shaft robot is located above the conveying strip which penetrates through the inner side of the water curtain cabinet, and the club head tool assemblies are distributed on the conveying strip. The automatic spraying line is simple and reasonable in structure, high in degree of automation and spraying efficiency, good in spraying quality, high in finished rate and applicable to multiple spraying procedures, and the clean working environment is guaranteed.

The invention discloses a telescopic tunneling immediate support device, which effectively solves the problem of unavailable continuous roof contact or poor roof contact capability existing in the prior art during use. The support device comprises hydraulic upright posts, beams and longitudinal beams, and is characterized in that: the bottom of each hydraulic upright post is provided with a base;the beams comprise a front beam, a middle beam, a rear beam, a main support beam and an auxiliary support beam which are arranged in parallel with one another; the longitudinal beams comprise a frontelastic longitudinal beam, a middle elastic longitudinal beam, a rear elastic longitudinal beam, a front rigid longitudinal beam, a middle rigid longitudinal beam, a rear rigid longitudinal beam and a side rigid longitudinal beam which are arranged in parallel with one another and are vertical to the beams; a push hydraulic cylinder is hinged between every two beams respectively; and the elastic longitudinal beams and the rigid longitudinal beams are fixed on corresponding beams respectively, inserted in limiting guide sleeves of corresponding beams and driven to move along the limiting guidesleeve in a reciprocating way by the beams. The support device has the advantages of reasonable structural distribution, convenience for adjusting continuous roof contact, stable supporting and capabilities of improving the operating environment of workers, better meeting the requirement on matching job of an underground laneway support and a roadheader and remarkably improving the support quality and tunneling operation efficiency of a laneway top plate.

The invention belongs to the technical field of design and manufacture of coal mine down hole railless auxiliary transportation equipment, and particularly to a mining timeliness four-wheel drive automatic speed changing multi-mode power driving system. The problem that a mining electric driving vehicle cannot effectively meet the requirement of complicated changing conditions of the coal mine down hole is solved. The power-driven system comprises a water-cooled type middle dual-drive anti-explosion motor, a planetary speed reducing mechanism I, a planetary speed reducing mechanism II, a left output flange and a right output flange, and the dual-drive anti-explosion motor is connected with the planetary speed reducing mechanism I, the planetary speed reducing mechanism II, the left output flange and the right output flange correspondingly through left rotating shafts and right rotating shafts which penetrate through a center. The mining timeliness four-wheel drive automatic speed changing multi-mode power-driven system has obvious advantages that two-motor drive, automatic transmission and driving force switching in the driving system are integrated together, drive mode, driving force switching and automatic speed charging are integrated together, the structure is compact, and making the coal mine vehicle realize the vehicle multiple driving force output and front wheel drive, rear wheel drive and four-wheel drive of the vehicle of the coal mine vehicle can achieve real-time switching to ensure that the motor can work in the efficient range in a long time, the energy use ratio and the applicability of a variety of mine conditions are improved, the drive mode, driving force switching, and automatic speed charging are integrated together, and the driving system is accorded with the using conditions and the development direction of the vehicle of coal mine down hole.

The invention discloses a camera calibration device based on a diffractive optical element, relates to the field of photogrammetry, and solves the problems of high cost and large space occupied by existing calibration devices. The device includes a laser, a spatial filter, a collimating lens, and a double-crossed one-dimensional DOE. The laser, the spatial filter, the collimating lens and the double-crossed one-dimensional DOE are sequentially arranged along the same axis, and a laser beam emitted from the laser is incident perpendicularly to the spatial filter, the collimating lens and the double-crossed one-dimensional DOE sequentially. The camera calibration device in the invention replaces the existing high-cost calibration module that occupies a large space through a diffraction starpoint network composed of N*N star points and obtained using the double-crossed one-dimensional DOE; simulates infinity imaging by using the collimating lens to comply with conditions of the use of anaerial survey camera; and at the same time does not limit the processing algorithm, that is, can guarantee the calibration accuracy. The camera calibration device can be widely used in the field of camera calibration.

The invention belongs to the technical field of abrasion-resistant materials and discloses a metal frame reinforced ceramic composite material and a preparation method and application thereof. An outer shell of the metal frame reinforced ceramic composite material is a reinforced metal frame, and a reinforcement composite block is arranged in an inner cavity of the outer shell. The preparation method includes that raw materials are subjected to mixing, pressing and liquid-phase sintering to obtain the metal frame reinforced ceramic composite material for preparing high-abrasion-resistance composite lining plates or high-abrasion-resistance composite roller sleeves. The method is low in production cost, crack sources resulted from sudden heating and cooling of ceramic particles and metal frame leakage can be avoided through temperature-controlled sintering and cooling, and the ceramic particles are controllable in volume fraction and distribution state. After subsequent thermal treatment, the high-abrasion-resistance composite lining plates or high-abrasion-resistance composite roller sleeves prepared from the metal frame reinforced ceramic composite material are high in performance, great in interface bonding and free of macroscopic defects such as holes, segregation, cracks and the like.

The invention discloses a bacillus licheniformis and application. The bacillus licheniformis is BL57 CGMCC No.2277. The bacillus licheniformis BL57 of the invention can utilize industrial or agricultural waste which contains cellulose as raw material such as plant straw, leaf, other industrial or agricultural waste tissue, grain stillage and the like and transmit the cellulose in these raw materials into reduction sugar, which improves the utility value of the waste greatly.

The invention provides a ceramic-reinforced metal-matrix composite with an optimized particle size and a preparation method and application thereof, and belongs to the technical field of wear-resistant materials. The ceramic-reinforced metal-matrix composite with the optimized particle size comprises a metal base material and reinforcement-phase ceramic particles. The volume content of a reinforcement phase in the ceramic-reinforced metal-matrix composite with the optimized particle size is 20%-50%. The particle size of the reinforcement-phase ceramic particles is one or the combination selected from 1-0.1 [mu]m, 0.1-1 mm and 1-5 mm. The composite is prepared through a liquid-phase sintering method. The preparation method is simple in process and low in cost, various reinforcement mechanisms including a staggered reinforcement mechanism, a Orowan reinforcement mechanism, a hardening reinforcement mechanism, a deposition reinforcement mechanism and the like are adopted for the composite, and the reinforcement mechanisms generated by changes of the matrix microstructure interact to achieve excellent mechanical performance of the whole composite.

The invention provides a mine coil sampling repairing device. The device comprises a main frame, brackets are symmetrically and fixedly welded at two ends of an external lower surface of the main frame; a mounting rod is fixedly welded at a lower end of each bracket; a rotating tube is rotatably arranged in a lower end of a first drill stem in a tubular type, second sampling slots are formed at afront sidewall and a back sidewall of the lower end, and first sampling slots are arranged at a left side and a right side of the lower end; a second drill stem is spirally and fixedly arranged at thelower end of the first drill stem through the thread; the second drill stem is arranged at the middle lower part in the main frame, and a third motor is fixedly arranged at the inner side of a sliding rod; a drill is rotatably connected with the outer surface of the lower end of the second drill stem and arranged above a sampling port; the sampling port is formed at the middle of the lower wall of the main frame. The repairing device disclosed by the invention is strong in flexibility, simple for use, conforming to various use conditions, and high in practicability.

The invention discloses a bead suspension polymerization method for methyl methacrylate, which comprises a step of mixing an oil phase and an aqueous phase to carry out a suspension polymerization reaction. The oil phase comprises a methyl methacrylate monomer and an oil-soluble radical initiator; the aqueous phase comprises water and at least three suspending agents, namely a cellulose surfactant, a vinyl pyrrolidone polymer nonionic surfactant and an acrylic polymer anionic surfactant. In the method, a polymerization reaction system is stable and easy to control, the polymerization reaction period is shortened, the yield is improved, and the method is low in cost. Meanwhile, the polymethyl methacrylate (PMMA) polymer particles prepared by the method meet the service conditions for manufacturing artificial resin teeth.

The invention discloses a preparation method of cyan cigar-coated tobacco, and the cyan cigar-coated tobacco prepared by the preparation method disclosed by the invention has the characteristics that(1) the color of the tobacco is changed from light yellow green, light cyan, cyan to dark cyan, the oil content of the tobacco is better, the integrity is good, the veins are finer, and the leaves aresmooth, and the use conditions of the cigar-coated tobacco are met; (2) through sensory quality identification, the cyan cigar-coated tobacco is good in aroma quality, sufficient in aroma amount, soft and fragrant in aroma, small in irritation and low in miscellaneous gas amount, has unique fruity faint scent, has slight pepper flavor, wood flavor and grey tobacco ash, and meets the use requirements of products; and (3) the tobacco leaves are added into the product formula design, the cyan cigar-coated tobacco prepared by the method is used as the product cigar coating, the appearance meets the design requirement, the fresh and wood fragrance is brought to the whole new formula, the cigar coating tobacco leaves with new colors are provided for the production of domestic cigars, and the product style is enriched.

The invention discloses an inflation device and an inflatable curtain of the same structure. The inflation device comprises a soft inflation body and a guide airbag and further comprises an inflator, a microcontroller, a dust collector, a baroceptor, a displacement sensor and a wireless transceiver. Through matching of the soft inflation body and the guide airbag, random distribution of space can be realized, and the guide airbag can control the swelling degree and direction of the soft inflation body. The inflation device is suitable for partitioning the space in a living room, a large-scale stadium, a natatorium, a community building and other space to achieve the purposes of flexibly using space and saving air-conditioning energy. Besides, the inflation device can also be used as a temporary isolation wall or an isolation door and window. Wireless control of an external / cloud end is realized by means of connection through the microcontroller, and therefore intelligent control of the inflation device is realized.

The invention provides a transport bed methanation catalyst and belongs to the technical field of transport bed catalysts. Based on oxides, the catalyst includes 10-30 parts of an active component that is NiO, 0.5-15 parts of an auxiliary agent and 70-90 parts of a carrier that is Al2O3. The auxiliary agent is one or more selected from oxides of Mg, Ca, La, Ce, Zr, Ti and Mo. A preparing method of the catalyst is also provided. The method includes soaking calcinated alpha-Al2O3 microspheres in a solution of an auxiliary metal soluble salt and a soluble salt of Ni, and then drying and calcinating the microspheres to obtain the microsphere type transport bed methanation catalyst. The catalyst has characteristics of a low catalytic activating temperature, high activity, high stability, proper particle diameter distribution, good mobility, good carbon resistance, and good wear resistance, has a microsphere shape, and is suitable for transport bed reactors. The catalyst is prepared by a soaking process, and the preparing process is simple and efficient and facilitates large-scale production.

The invention provides a computer mainframe box for solving the problem that in the prior art, a computer mainframe box cannot prevent the electron migration phenomenon from occurring. The mainframe box is of a cube structure, and a first space and a second space which are isolated from each other are formed in the mainframe box; the mainframe box is provided with an air conditioning refrigeration system, a compressor and a condensation device of the system are located in the first space, the first space is communicated with the outside through an air inlet of the system, and the condensation device is communicated with the outside through an air outlet of the system; an evaporator of the system is located in the second space, and after a mainframe part is arranged in the second space, the second space becomes a closed space; a cross-flow fan of the system is located on the outer side of the mainframe box and corresponds to the evaporator; the temperature difference of inlet air and outlet air of the system is smaller than or equal to 3 DEG C.

The present invention discloses process of raising cleanliness of prepared electronic chemicals, and features that chelating agent is added into electronic chemical dissolved in organic solvent to capture various kinds of metal ions in the solution to form chelate precipitate and the solution is then filtered in ultrafilter to eliminate Cu, Pb, Zn and other metal ion impurities. Thus obtained high purity chemical has metal ion content not higher than 1.0x10<-10> and contains non-metal impurity grains in the size of 0.2-0.5 micron not more than 5 / ml. It reaches the requirement of SEMI-C12 standard, and is suitable for use in making printed circuit board.

The invention provides a stable and highly-efficient cloth material printing and dyeing apparatus. The stable and highly-efficient cloth material printing and dyeing apparatus comprises a base. The upper surface in the middle of the base is fixedly welded with a main frame body. Support racks are arranged on left and right sides of the main frame body. The outer surface at the right end of a dyeing drum is fixedly equipped with a thermal insulation board. The thermal insulation board is arranged leftwards below the interior of the main frame body. A turning wheel is arranged rightwards above drying wheel groups. Front and back ends of a printing wheel are rotatably installed on front and back walls leftwards above the interior of the main frame body. Cloth material is rotatably wounded around the outer surfaces of the turning wheel through the turning wheel. The right side is equipped with a bearing board. The right side of a printing board is equipped with a first installation frame.The right side of the first installation frame is equipped with a discharge opening. The left end of a support rod is fixedly welded on the right surface outside the main frame body. The stable and highly-efficient cloth material printing and dyeing apparatus is convenient in operation, high in stability, great in printing efficiency and high in practicality and suitable for all application conditions.

The invention discloses a puncture-preventing entry needle, which comprises a needle body, a needle base, a container and a spiral tension spring, wherein the container comprises a shell and a safe helmet, the shell comprises a cylinder wall and an end plate; the end plate is provided with a needle hole; the inside of the end plate is provided with a safe helmet; the safe helmet comprises a baffle and an elastic arm; when the elastic arm is in a free state, one side of the baffle is in elastic contact and connection with the inner wall of the cylinder wall, the baffle covers the needle hole; when the needle body penetrates into the needle hole, the side edge of the baffle does not contact the inner wall of the cylinder wall; the spiral tension spring and the needle body are coaxially arranged; when the spiral tension spring is in a free state, the container contacts the needle base, the needle body penetrates through the needle hole; after the puncture-preventing entry needle is used, the container is arranged at the needle tip, the needle body retreats out of the needle tip, and the baffle covers the needle hole. By using the puncture-preventing entry needle disclosed by the invention, the container can prevent the needle tip from penetrating from the needle hole after the puncture-preventing entry needle is used, so that the accident that a person is hurt by the entry needle can be avoided, the puncture-preventing function is reliable and the effect is remarkable.

The invention relates to an in-time supporting device for a fully-mechanized coal mining machine, comprising a pedestal, a top beam, a hydraulic upright post which connects the pedestal and the top beam, side frames which consist of four link mechanisms, and a telescopic connecting beam and a hydraulic cylinder which are hinged between two side frames. The invention adopts the technical key pointsthat: top beams of the side frames adopt front top beams or continuous top beams; the side frames which are arranged in parallel and provided with the front top beams or the continuous top beams arehinged into a front support or a continuous support through an arched beam or a horizontal beam; shun beams are arranged on the arched beam or the horizontal beam at intervals; belt guard beams or telescopic shun beams are arranged between adjacent shun beams. The in-time supporting device for the fully-mechanized coal mining machine effectively solves the problems in the prior art of lagged supporting means, difficult frame movement, requirement of stop operation, low efficiency and so on, is reasonable in structural design, stable in supporting operation, convenient in assembly and disassembly and maintenance, and safe and reliable in use, preferably meets the requirements of matched operation of underworkings and the fully-mechanized coal mining machine, realizes in-time mechanical support of a just exposed roof of a tunneling work surface of a laneway, and shields the fully-mechanized coal mining machine to realize continuous operation.

The invention relates to a method for producing stainless iron cakes by using blast furnace dust, stainless precipitator dust and iron scale, comprising the following sequential steps: uniformly mixing the following raw materials by mass proportion: 30-45 parts of the blast furnace dust, 15-30 parts of the stainless precipitator dust, 40-50 parts of the iron scale and 2-6 parts of water glass+ADs- adding 4-8 parts of water into the mixed raw materials to uniformly stir+ADs- extruding and pressing cakes by a cake pressing machine+ADs- filling the pressed cakes in clay pots, 5-6 pressed cakes being in each pot+ADs- putting the pots in a tunnel kiln, increasing the temperature of the pressed cakes in the pots by coal gas to 600DEG C100 DEG C for insulation for 10-16h+ADs- reducing the pressed cakes in the pots for 30-44h at a reduction temperature of 1180 DEG C150 DEG C in the tunnel kiln+ADs- and conveying the pots out of the tunnel kiln and air-cooling the pots and pressed cakes to produce the stainless iron cakes. The method for producing stainless iron cakes by using blast furnace dust, stainless precipitator dust and iron scale has low cost and high efficiency.

The invention provides a textile roller safety protection taking and placing device. The device comprises a base; a main frame body is fixedly welded on the upper surface of the middle part of the base; the upper part of a clamping rod is arranged in a mounting frame; a clamping ring is fixedly welded at the lower end on the left side of a first turbine; a first sealing rubber ring is fixedly mounted on the lower surface edge of a sealing plate; a second sealing rubber ring is matched on the lower surface of the first sealing rubber ring, and is fixedly mounted on the upper end edge of a storage box; the outer end of a fixed rod is inserted in the left and right end walls of the main frame body, and a thread pipe is fixedly welded at the right end; the upper and lower ends of a second thread rod are rotationally mounted in the right wall of the main frame body through a bearing, and a third turbine is fixedly welded on the outer surface of the lower part; a third motor is arranged under the external of the right end of the main frame body, and the lower end is fixedly mounted on the lower surface in a fixed frame. The device is convenient to use and high in protectiveness, meets various use conditions, and achieves high practicability.

The invention provides a preparation method of a black matte polyimide film, which comprises the following steps: (1) preparation of an emulsion: adding a black filler and matting powder into an ultrasonic dispersion kettle, adding a solvent, stirring, and carrying out ultrasonic dispersion treatment; (2) preparation of amine liquid: adding an aromatic diamine monomer into a reaction kettle, adding a solvent for dissolving, and stirring; (3) emulsifying: adding the dispersed black emulsion into the dissolved amine liquid, adding an auxiliary agent, and dispersing by a high-speed emulsifying pump; (4) preparation of polyamide acid: adding an aromatic dianhydride monomer with the molar weight equal to that of the aromatic diamine monomer in the step (2) into the reaction kettle in batches for reaction, and stirring; and (5) salivation forming. According to the invention, the problem that the mechanical property of the polyimide film added with the black filler and the matting powder is reduced in the prior art is solved.

The invention relates to a top adjusting mechanism of a tunneling immediate support device, which effectively solves the problems that the top beam support angle of a side frame can not be independently adjusted and the top connecting capacity is poor in the prior art; the top adjusting mechanism of the tunneling immediate support device comprises a side frame with a top frame of an immediate support device of a comprehensive tunneling machine; the technical points are that: the top beam of the side frame is composed of two groups of cross beams and cross top beams which are articulated with an articulating bracket, two ends of the cross beam are fixed with the side frame, the articulating end of an upper connecting rod and a lower articulating rod of the articulating bracket is articulated to the expansion end of a hydraulic cylinder at the middle part of the cross beam, two ends of the cross top beam, which are articulated with side baffle plates, are respectively provided with articulating holes, connecting lug plates at two ends of the cross beam are respectively provided with articulating holes corresponding to the articulating holes of the cross top beam. The structure distribution is rational, the assembly and disassembly and maintenance are convenient, the usage is safe and reliable, the adjustment is convenient, the support is stable, flexible support of the top beam of the side frame to a special-shaped tunnel section can be met, the adaptive angle change range is large and flexible, support quality of the tunnel top plate and the tunneling operating efficiency can be remarkably improved.

The invention provides a chip mounting process for reducing stress. The process comprises the following steps of S1, mounting a chip on the surface of a substrate through a surface mounting process, and performing reflow soldering to correspondingly connect each solder ball on the front surface of the chip with a bonding pad on the substrate, wherein the chip is provided with array type small chip units in advance; S2, filling the bottom of the chip with underfill glue, absorbing the liquid underfill glue to enter a gap between the chip and the substrate through the surface tension of the chip and the substrate, and then curing the underfill glue; S3, segmenting the back surface of the chip to form a groove, and segmenting the chip into the array type small chip units, wherein the small chip units realize the interconnection among the array type small chip units through the bonding pads and wires on the substrate. According to the invention, the chip is designed into an array structure, the chip is welded with the substrate and is divided into the array small chip units, so that the chip mounting consistency difficulty can be reduced, the mounting cost is reduced, and the total area of the chip is kept basically unchanged.

This invention relates to a process for producing silicate-coated BiVO4 yellow ceramic pigment. The process comprises: preparing yellow pigment BiVO4, and preparing heat-resistant yellow pigment BiVO4 / SiO2. The process utilizes silicate as the Si source to coat the surface of BiVO4 with SiO2. Since SiO2 has strong inertia, the yellow ceramic pigment can resist 1000 deg.C high temperature, and has good color, loose structure and fine particles even calcined at 1000 deg.C. Besides, the yellow ceramic pigment is environmentally friendly, and does not contain toxic heavy metals such as Pd, Cd and Cr.

The invention belongs to the field of big data analysis, and particularly relates to a theme-oriented smart city index system cutting method. In order to solve the problems that an existing index system is face-to-face but cannot highlight a theme, and an evaluation result based on the index system cannot reflect city characteristics. According to the the method, firstly, on the basis of the existing index system, the index system is constructed into a tree structure, and hierarchical and modularized management is performed on the index system; a characteristic theme inheriting a certain index system is created in a theme library; and an index weight under a certain theme is set by selecting weight setting under the theme in a theme library, a method for modifying the same-level index weight under the theme takes an analytic hierarchy process as a core, index items which are not related to the theme are cut off through a series of steps on the basis of a preset threshold value of the index item weight, and the weights of the index items under the theme are updated, so that theme-oriented index system cutting is realized.

The invention provides a paperboard conveying device for packaging box processing. The device comprises a base; a mounting frame is fixedly welded to the upper surface of the base; a second motor is fixedly installed on the upper surface of the front end of the left side of a placement table; a third turbine is rotatably connected to the upper end of the middle of a third thread rod; the third turbine is arranged in the middle in the placement table, and the interior of the third turbine penetrates through and is fixedly welded to the outer surface of the middle of a fourth thread rod; the fourth thread rod is arranged above the third thread rod, the fourth thread rod crosses with the third thread rod, and second fixing clamps are symmetrically and rotatably connected to the outer surfacesof the two ends of the fourth thread rod through threads; the lower end of a supporting rack is fixedly welded to the upper surface of a second mounting plate; the second mounting plate is arranged under the middle of the supporting plate, and a suction cup is fixedly installed on the lower surface of the second mounting plate; the suction cup is arranged over the middle of the placement table. The paperboard conveying device for packaging box processing is simple in structure, convenient to use and high in stability and practicability and accords with various use conditions.

The invention discloses a shielding device for limiting shooting of a vehicle-mounted camera in front of a motor vehicle.The device comprises an external shielding plate, an internal auxiliary fixing plate and an external controller, the external shielding plate is installed on the outer side of a front windshield of a vehicle, the external controller is electrically connected with the external shielding plate, the internal auxiliary fixing plate is arranged on the inner side of the front windshield of the vehicle, and the internal auxiliary fixing plate and the external shielding plate are oppositely arranged. The invention belongs to the technical field of electric permanent magnetic chucks, and particularly relates to the shielding device for limiting shooting of a vehicle-mounted camera on the front portion of a motor vehicle. According to the characteristics of magnetization and demagnetization of an electric permanent magnet chuck, the shielding device can be mounted and dismounted, the shielding device cannot be dismounted automatically by means of the strong magnetic attraction force between the electric permanent magnetic chuck and the auxiliary fixing plate, and the effect of effectively shielding the vehicle-mounted front camera is achieved.