42results about How to "Solve key technical problems" patented technology

The invention discloses a purification method in the production of high-purity quartz sand applied to the raw materials of quartz glass. Through effectively eliminating hydroxyl group and gaseous-liquid inclusion in a natural quartz, the raw material of the quartz glass hyphen, the high-purity quartz sand produced by a common vein quartz, is realized, thereby achieving the effective control to key quality indexes such as air bubbles and air lines in a quartz glass product, and breaking the high dependency to the quality of an ore in the prior process art, so that the availability of vein quartz resources in a quartz glass industry is improved to above 80 percent from about 5 percent; the content of the high-purity quartz sand SiO2 produced by the common vein quartz ore reaches above 99.99 percent; and the total amount of the foreign impurities of thirteen metallic elements is less than 25 to 30 ppm.

The invention discloses a car body-in-white welding spot positioning method and device based on robot visual servo. The method comprises the steps that a partial car body image with body-in-white welding spots is collected and stored in a storage unit, and the image is read from the storage unit; the image is preprocessed; edge extraction is performed on the preprocessed image; the position coordinates and radius sizes of the car body-in-white welding spot or circular hole targets in the image are acquired by utilizing random Hough transformation; a target image is intercepted, feature extraction and classification recognition are performed on the target image, and a positioning coordinate is obtained and transmitted to a robot control system. According to the car body-in-white welding spot positioning method and device, quick and automatic recognizing and positioning of a car body-in-white welding spot quality detection robot on the body-in-white welding spots to be detected are achieved, the car body-in-white welding spot quality detection robot can be guided to accurately position the body-in-white welding spots, and the key technical problems are solved for achieving intelligent detection of the car body-in-white welding spot quality detection robot on the welding spot quality on a car industry manufacturing production line.

The invention relates to a complex manganese ore powder pelletization process. High-crystal-water manganese powder ore is treated by a cylindrical drier for drying, a four-roll crusher for coarse crushing and a high-pressure roller mill for fine milling pretreatment, bentonite and flux are added in finely milled manganese ore concentrate obtained after pretreatment for pelletization, green pelletsare dried and preheated on a chain-grate machine, preheated pellets enter a rotary kiln for high-temperature roasting and then is cooled to obtain a pellet product. Compared with ball milling process, the invention can reduce the energy consumption in pretreatment flow, improve the ballability index of finely milled material, eliminate thermal explosion of pellets and solve the technical problemsthat narrow manganese ore softening temperature area affects pellet roasting. The adoption of two-segment preheating effectively prevents cracks on the preheated pellets and improves the performancesof the preheated pellets; the addition of limestone or dolomite as flux changes the alkalinity and the slagging property of raw material and enhances the pellet roasting and next melting; and the produced manganese ore pellet has high strength, large output and high manganese grade.

The invention relates to a rock-socketed single pile foundation of offshore wind turbines in batholith seabed and a construction method thereof. The rock-socketed single pile foundation comprises a steel pipe pile inserted in a moderately weathered batholith layer. An annular groove located at the periphery on the lower end portion of the steel pipe pile is formed in the batholith. An inner casing is nested within the lower end of the steel pipe pile. A gap is reserved between the inner casing and the inner wall of the steel pipe pile. The inside of the annular groove and the gap between the inner casing and the inner wall of the steel pipe pile are both filled with a high-strength grout having initial setting time of no less than 8 h. The rock-socketed single pile foundation of offshore wind turbines in batholith seabed in the invention is stable and reliable, ensures that the single pile foundation can be tightly bonded with the surrounding batholith, and reliably embedded in the moderately weathered batholith layer. The impact of a large boring diameter and a borehole perpendicularity error on the gradient of the single pile foundation and the problem of local stress concentration of the rock-socketed section of the steel pipe pile due to unevenness of the bored rock surface are reduced. Moreover, the cubic quantity of backfill concrete for the rock-socketed section can be lowered. The critical technical problem of use of the single pile foundation in the batholith seabed is effectively solved.

The invention relates to a seamless steel tube, in particular to a molybdenum-base rare earth powder metallurgy forming plug used by a high nickel-chromium stainless steel seamless pipe and a manufacturing method thereof. The manufacturing method of the molybdenum-base rare earth powder metallurgy forming plug comprises the following steps of: simultaneously mixing four rare earth oxides of ZrO2, Y2O3, La2O3 and SC2O3 in pure molybdenum powder; mixing molybdenum-base material to prepare powder by using an ultrasound characteristic; packaging the powder into a vane mixing blender, dispersing mixed molybdenum-base rare earth powder by primary refining; dispersing homogenized molybdenum-base rare earth powder by ultrasound refining through an ultrasound transducer; screening by a 180-mesh equalizing screen in accordance with a configured Tyler standard in a 'vibrating screen classifier' to obtain screen under flow, namely blended qualified molybdenum-base rare earth powder; and manufacturing the molybdenum plug by an isostaticmoulding mold, demolding and cleaning, and finishing the manufacturing in a configured hydrogen atmosphere roaster, a hydrogen atmosphere pre-sintering furnace and a hydrogen atmosphere horizontal intermediate frequency furnace. The molybdenum-base rare earth powder metallurgy forming plug and the manufacturing method thereof can be widely applied to chemical industry, metallurgy, machinery, aviation, national defense and other industrial departments.

The invention discloses a method for improving the firmness of combination of a dye-sensitized cell nanometer fibrous membrane and conductive glass. The method comprises the following steps of: (1) spin coating a thin transition layer on the conductive glass before fiber deposition, wherein the thin transition layer is made of spin-coating liquid which has the same elements and higher viscosity compared with a TiO2 precursor spinning solution; (2) adding a proper amount of surfactant triton to the spin-coating liquid and the spinning solution; and (3) processing sintered TiO2 nanometer fibrous membrane with a TiCl4 aqueous solution. Under the synergic action of the three steps above, the firm combination of the TiO2 nanometer fibrous membrane prepared by an electrostatic spinning technology and an FTO (Fluorine-doped Tin Oxide) conductive glass substrate is realized, a key technical problem of application of the electrostatic spinning technology to preparation of a photoanode of a dye-sensitized solar cell is solved, and performances and stability of a deice are improved.

The invention discloses a winch automatic controlling type three-section folding conveyor. The winch automatic controlling type three-section folding conveyor comprises three conveying arms, a main portal frame and a winch. The winch automatic controlling type three-section folding conveyor is characterized by further comprising a secondary portal frame I, a secondary portal frame II, a hydraulicoil cylinder, a limiting device I, a limiting device II and a steel wire rope, wherein the conveying arms are all of a trapezoidal truss type structure; the secondary portal frame I is hinged with a hinging hole in the big end of the second conveying arm, and the limiting device I is arranged on the hinging hole; the secondary portal frame II is hinged with a hinging hole in the small end of the second conveying arm, and the limiting device II is arranged on the hinging hole; the winch, the hydraulic oil cylinder and the main portal frame are mounted on a ship body. According to the winch automatic controlling type three-section folding conveyor, the conveying arms are long enough and are upwards turned over to be folded, and moreover, the hydraulic oil cylinder is not used, so that the load of a belt is decreased, the cost is reduced, and the mass of the conveying arms is reduced; the problems such as safety accident caused by forwards-shifted weight due to excessively high mass of the conveying arm can be solved, and thus the safety coefficient is increased.

The invention relates to a magnetic brick with electromagnetic shielding and decoration functions and its preparation method which comprises charging the mixture of hydroxyethyl methacrylate and triethylene glycol dimethylacrylate mixed by the mass ratio of 10 : (50-1), water-soluble macromolecular material, dispersing agent, initiating agent into deionized water, mixing to prepare monomer solution, then charging soft magnetic ferrite powder into the prepared monomer solution, mixing to obtain suspension system, then pouring the suspension system into molding dies, heating, thermal insulating, demoulding, drying, thus obtaining ceramic tile plain blanks, then glazing and stamping on the blanks, finally thermal insulating 3-4 hours at 1200-1400 deg. C.

The invention belongs to the technical field of quality analytical instrument and particularly relates to an assembling method for a quality analytical instrument with four-pole rods. The assembling method comprises the following steps of: uniformly arranging four four-pole rods in an insulation cup, wherein dowel pins on two ends of an outer circle of the four-pole rods are firmly matched with through holes uniformly distributed on the outer wall of the insulation cup; regulating the tangential matching of a positing clamp and the four-pole rods to determine the relative displacement of the four four-pole rods; sealing or welding the contact surfaces of the dowel pins on the upper ends of the four-pole rods and the insulation cup; putting the whole device in an appropriate environment according to the expansion and concentration coefficient of the positioning clamp material; getting out the positing clamp according to the expansion and concentration principle to complete assembling the whole device. The assembling method provided by the invention uses the high-precision positing clamp to position the relative displacement of the four four-pole rods, and implements the assembling according to the circular surface tangency and the expansion and contraction principle in physics. Moreover, the assembling method reduces the processing difficulty coefficient and improves the qualified rate of the whole four-pole quality analytical instrument.

The hoisting sling special for long steel rail includes one suspended beam, one electromagnetic disc mounted below the suspended beam, and two pulley blocks. It features the suspended beam comprising one upper suspended beam, one adjustable pull rod, one lower suspended beam, and two pairs of connecting plates connected with four pin shafts between the upper suspended beam and the lower suspended beam; and several pairs of hoisted rail protecting devices. The upper suspended beam is one double hoisting point box beam structure, and the lower suspended beam is one truss structure with trapezoidal cross section. The present invention has simple structure, light weight, high rigidity, has safety, high production efficiency and easy operation and maintenance.

The invention discloses a purification method in the production of high-purity quartz sand applied to the raw materials of quartz glass. Through effectively eliminating hydroxyl group and gaseous-liquid inclusion in a natural quartz, the raw material of the quartz glass hyphen, the high-purity quartz sand produced by a common vein quartz, is realized, thereby achieving the effective control to key quality indexes such as air bubbles and air lines in a quartz glass product, and breaking the high dependency to the quality of an ore in the prior process art, so that the availability of vein quartz resources in a quartz glass industry is improved to above 80 percent from about 5 percent; the content of the high-purity quartz sand SiO2 produced by the common vein quartz ore reaches above 99.99percent; and the total amount of the foreign impurities of thirteen metallic elements is less than 25 to 30 ppm.

The invention relates to a chlorination furnace slag washing treatment method and a use of a treatment liquid. The chlorination furnace slag washing treatment method comprises that chloride ions in chlorination furnace slag are dissolved into water by water washing so that the chloride ions are removed. The use of the chlorination furnace slag washing treatment liquid comprises the following steps of 1, separating precipitates of Ca<2+>, Mg<2+>, SO4<2->, Fe<3+> and other heavy metal ions in chloride ion-containing water obtained by water washing from the solution, and removing the precipitates and insoluble impurities by filtration to obtain a filtrate as an electrolyte for the next process, and 2, electrolyzing the chloride ion-containing water obtained by the above process to produce chlorine, hydrogen and a caustic soda solution. The chlorination furnace slag washing treatment method solves a key technical problem limiting use of chlorination furnace slag in a building material industry. Through the chlorination furnace slag washing treatment method, chloride ions in chlorination furnace slag are removed and the chlorination furnace slag can be directly used in the building material industry so that chloride ion-containing water treatment and recycling are realized simultaneously and a large amount of chlorine is provided for a chlorination process of TiCl4 preparation. Through removal of harmful impurity ions and other insoluble impurities, saline water satisfying electrolytic requirements is obtained and a production cost is low.

The invention discloses a method for extracting parameters from acoustoelectric effect underground detector measurement data. The method for extracting parameters from the acoustoelectric effect underground detector measurement data comprises the following steps of calculating an energy ratio of an intrinsic wave and an accompany converted wave at every predetermined depth of a plurality of predetermined depths, performing normalization processing on the energy ratios of the intrinsic waves and the accompany converted waves and obtaining a first normalization ratio curve which changes along with depth within a target well section range; calculating an energy ratio of an interface converted wave and an intrinsic wave at every predetermined depth of a plurality of predetermined depths, performing normalization processing on the energy ratios between the interface converted waves and the intrinsic waves and obtaining a second normalization ratio curve which changes along with depth within a target well section range; simultaneously solving a coupled acoustic-electromagnetic coefficient curve according to the first normalization ratio curve and the second normalization ratio curve; evaluating the in-place permeability according to the coupled acoustic-electromagnetic coefficient curve in combination with log data. The method for extracting parameters from the acoustoelectric effect underground detector measurement data solves the problem that majority logging method cannot directly evaluate the in-place permeability.

The invention provides a designing method of a double-tube plate heat exchanger tube plate, and belongs to the technical field of heat exchanger tube plate design. The method mainly comprises the steps that a double-tube plate heat exchanger is dismantled into two fixed-tube plate equivalent heat exchangers, wherein the two fixed-tube plate equivalent heat exchangers include an equivalent externalheat exchanger composed of outer tube plates and inner heat exchange tubes and an equivalent internal heat exchanger composed of inner tube plates and outer heat exchange tubes; then relevant designing calculation is carried out according to regulations of the relevant national standard. In the calculation process, the constraint effect of the inner tube plates and the outer heat exchange tubes on the equivalent cylinder body of the equivalent external heat exchanger is considered for the equivalent external heat exchanger, and the constraint effect of the outer tube plates and the inner heatexchange tubes on the cylinder body of the equivalent internal heat exchanger is considered for the equivalent internal heat exchanger. By means of the designing method of the double-tube plate heatexchanger tube plate, a novel technical scheme is provided for designing calculation of heat exchangers of the type, and a key technical problem obsessing technical workers in the relevant field for along term is solved.

The invention adopts the technique of combining traditional breeding and molecular breeding. Firstly, a key gene of genK is knocked out, the metabolic flow of gentamicin C1 is blocked, a micromonospora purpurea engineering strain Gb1088 is obtained, and components, C1, C2, C2a and G418, of the metabolic pathway of gentamicin C1 are no longer synthesized; then a genL-knocked micromonospora purpureaengineering strain Gb1098 is built. The strain does not synthesize gentamicin C2b, nor synthesizes the components, C1, C2, C2a and G418, of the metabolic pathway of gentamicin C1, and specificity synthesize gentamicin C1a. The new species micromonospora purpurea engineering strain Gb1098 has a fermentation unit of 1098 units / mL, the components are monotonous, extraction and refining are convenient, chromatography separation is not adopted, industrial production of gentamicin C1a is greatly facilitated, the key technical problems which have not been solved internationally in industrializationare solved, and the requirements of industrialization are met.

The invention relates to a converter trunnion ring and a method for accurately positioning and installing a converter shell. The method accurately determines the position of a supporting point of the converter trunnion ring, adopts a combined mounting bracket to reduce the center of gravity of equipment, improves the stability of the mounting process, ensures the positioning accuracy, and adopts a supporting point positioning pin to accurately position the converter trunnion ring on a trunnion ring bracket, and the central position of a converter mouth is adjusted by using the central line of a converter, so that the positioning precision of an oxygen lance opening and the oxygen lance center of a vaporization flue is improved. According to the method of the invention, excessive deviation of a positioning pin hole of a converter trunnion ring bearing pedestal is avoided, and the key technical problem in accurate positioning and mounting of the converter trunnion ring and the converter shell is effectively solved.

The invention discloses a method for preparing a temperature-sensitive film with a heat insulation buffer layer structure. The method comprises the following steps: preparing a heat insulation bufferlayer on the surface of a silicon substrate; preparing a silicon dioxide insulation layer on the surface of the heat insulation buffer layer; and preparing a temperature-sensitive film on the surfaceof the silicon dioxide insulation layer to obtain the temperature-sensitive film with the heat insulation buffer layer structure. The heat insulation buffer layer is a porous silicon-based structure with different structure characteristics, formed by growing silicon pillars, silicon spheres or silicon rods on the surface of a silicon wafer, and air stored in pores is sued to achieve heat insulation between the temperature-sensitive film and the silicon substrate, so the whole heat capacity and the heat dissipation of the temperature-sensitive film are reduced, and the response time of a thermistor is shortened, thereby the temperature-sensitive film can be developed into a miniature thermistor with fast response characteristics, very suitable for the field of fast response temperature monitoring. .

The invention discloses a method for increasing the transcaucasian barb artificial reproduction fertility rate. The method comprises the following steps of 1, parent fish preparation; 2, artificial hormone injection, wherein a two-time injection method is adopted for performing artificial hormone injection, and the time interval between two times of needle injection is 24 h; according to the female transcaucasian barb injection dosage, the first-time injection dosage is 4 micrograms per kilogram of parent transcaucasian barb, and the second-time injection dosage is 4 micrograms of LRH-A, 800 IU of HCG, 3-5 of PG and 2,800 IG of LRH-A per kilogram of parent transcaucasian barb, and the male transcaucasian barb injection dosage is 1 / 2 of the female transcaucasian barb injection dosage; 3, artificial insemination; 4, micro running water culture fertility rate. The two-time injection method is adopted for artificial injection, and the time interval is 24 h; a semidry method is adopted for artificial insemination, a certain amount of ringer solution is added, and the transcaucasian barb artificial reproduction fertility rate can be remarkably increased, so that the key technical problem of transcaucasian barb artificial reproduction is solved, and then guarantees are provided for fry culture and commercial fish artificial reproduction.

The invention relates to the technical field of LED lamp control, and in particular relates to a solar LED lamplight sensitive regulation control system. The system adopts a technical design of using a plurality of sensors such as a human body heat-sensitive sensor, a visibility sensor and an illumination sensor to detect environment and perform advanced PWM high-frequency inverted voltage regulation, solves the technical problem that the traditional solar LED illumination system is low in work efficiency and wasting in electric energy, and achieves the technical effect that automatic voltage regulation and light regulation are achieved on LED lamplight according to the environment, the work efficiency is high, energy is saved and environment is protected. The device adopts an automatic charging and discharging control mode, so that the technical problem that an accumulator is prone to damage when a traditional solar cell panel is continuously charged when being fully charged is solved, and the technical effect that the accumulator is automatically powered off when being fully charged and thus is safe and reliable is achieved; and the technical advantages of wireless remote control and convenient and rapid monitoring are achieved by using a Zigbee module.

The invention relates to the technical field of offshore wind power equipment, in particular to an offshore wind power implantation type single-pile foundation and a construction method thereof. The single-pile foundation comprises a straight-section single pile, a variable-diameter-section single pile and a reducing-diameter-section single pile which are connected sequentially from top to bottomthrough welding along the same central axis; the straight-section single pile and the reducing-diameter-section single pile are cylindrical; the variable-diameter-section single pile is shaped like abig-end-up circular truncated cone; the outside of the reducing-diameter-section single pile is sleeved with a cylindrical reinforcement cage; the reinforcement cage is welded to the outer wall of thereducing-diameter-section single pile; annular pouring space for pouring concrete is formed between the reinforcement cage and the outer wall of the reducing-diameter-section single pile; and concrete mass sensors are mounted inside the pouring space. According to the foundation, the outer wall of the reducing-diameter-section single pile in small diameter is sleeved with the annular reinforcement cage, the concrete is poured into the annular space of the reinforcement cage, the concrete mass sensors are arranged inside the pouring space, the pouring quality is monitored through data transmission by the aid of the sensors, and thus the rigidity and the horizontal bearing performance of the single-pile foundation are enhanced.

The invention relates to a seamless steel tube, in particular to a molybdenum-base rare earth powder metallurgy forming plug used by a high nickel-chromium stainless steel seamless pipe and a manufacturing method thereof. The manufacturing method of the molybdenum-base rare earth powder metallurgy forming plug comprises the following steps of: simultaneously mixing four rare earth oxides of ZrO2,Y2O3, La2O3 and SC2O3 in pure molybdenum powder; mixing molybdenum-base material to prepare powder by using an ultrasound characteristic; packaging the powder into a vane mixing blender, dispersing mixed molybdenum-base rare earth powder by primary refining; dispersing homogenized molybdenum-base rare earth powder by ultrasound refining through an ultrasound transducer; screening by a 180-mesh equalizing screen in accordance with a configured Tyler standard in a 'vibrating screen classifier' to obtain screen under flow, namely blended qualified molybdenum-base rare earth powder; and manufacturing the molybdenum plug by an isostaticmoulding mold, demolding and cleaning, and finishing the manufacturing in a configured hydrogen atmosphere roaster, a hydrogen atmosphere pre-sintering furnace and a hydrogen atmosphere horizontal intermediate frequency furnace. The molybdenum-base rare earth powder metallurgy forming plug and the manufacturing method thereof can be widely applied to chemical industry, metallurgy, machinery, aviation, national defense and other industrial departments.

The invention discloses a method for extracting parameters from acoustoelectric effect underground detector measurement data. The method for extracting parameters from the acoustoelectric effect underground detector measurement data comprises the following steps of calculating an energy ratio of an intrinsic wave and an accompany converted wave at every predetermined depth of a plurality of predetermined depths, performing normalization processing on the energy ratios of the intrinsic waves and the accompany converted waves and obtaining a first normalization ratio curve which changes along with depth within a target well section range; calculating an energy ratio of an interface converted wave and an intrinsic wave at every predetermined depth of a plurality of predetermined depths, performing normalization processing on the energy ratios between the interface converted waves and the intrinsic waves and obtaining a second normalization ratio curve which changes along with depth within a target well section range; simultaneously solving a coupled acoustic-electromagnetic coefficient curve according to the first normalization ratio curve and the second normalization ratio curve; evaluating the in-place permeability according to the coupled acoustic-electromagnetic coefficient curve in combination with log data. The method for extracting parameters from the acoustoelectric effect underground detector measurement data solves the problem that majority logging method cannot directly evaluate the in-place permeability.

The invention provides an ANSYS-based double-tube double-tube-plate heat exchanger tube plate design method and belongs to the technical field of heat exchanger tube plate design. The method comprisesthe main steps that first, a double-tube double-tube-plate heat exchanger is split into two fixed-tube-plate heat exchangers, namely an outer heat exchanger composed of an outer tube plate and an inner heat exchange tube and an inner heat exchanger composed of an inner tube plate and an outer heat exchange tube; then the two heat exchangers obtained through splitting are used as ordinary fixed-tube-plate heat exchangers to perform relevant design calculation according to relevant national standards; and ANSYS analysis software is utilized to perform finite element analysis on the heat exchangers, and stress analysis and checking are performed on the heat exchanger tube plates. Through the ANSYS-based double-tube double-tube-plate heat exchanger tube plate design method, a brand new technical scheme is provided for design calculation of this type of heat exchangers, and key technical problems bothering technical personnel in the relevant field for a long term are solved.

The invention relates to a magnetic brick with electromagnetic shielding and decoration functions and its preparation method which comprises charging the mixture of hydroxyethyl methacrylate and triethylene glycol dimethylacrylate mixed by the mass ratio of 10 : (50-1), water-soluble macromolecular material, dispersing agent, initiating agent into deionized water, mixing to prepare monomer solution, then charging soft magnetic ferrite powder into the prepared monomer solution, mixing to obtain suspension system, then pouring the suspension system into molding dies, heating, thermal insulating, demoulding, drying, thus obtaining ceramic tile plain blanks, then glazing and stamping on the blanks, finally thermal insulating 3-4 hours at 1200-1400 deg. C.

A glass steel frame of a hoop greenhouse belongs to special equipment for protected agricultural and comprises a T-shaped steel frame, a vertical arm, steel frame support tubes, a glass resting plate and glass-fixing wedge holes. The glass steel frame is novel in design, unique in structure and multipurpose. The key technical problems of vertical lighting steel frames for glass solar greenhouses and multi-span greenhouses are solved. The glass steel frame is scientific and reasonable in structure, high in strength, long in service life, and highly practical and applicable.

The invention relates to a method for precise positioning and installation of a converter support ring and a furnace shell. The position of the support point of the converter support ring is accurately determined, and the combined mounting bracket is used to reduce the center of gravity of the equipment to improve the stability of the installation process, and at the same time ensure the positioning accuracy. Point positioning pins make the converter support ring accurately positioned on the support ring support, use the center line of the converter to adjust the center position of the converter mouth, and improve the positioning accuracy with the oxygen lance mouth of the vaporization flue and the center of the oxygen lance. This method avoids the excessive deviation of the positioning pin hole of the bearing seat of the converter support ring, and effectively solves the key technical problems in the precise positioning and installation of the converter support ring and the furnace shell.

The invention relates to a column-beam intersection node structure of a steel-structure antique-imitated gable and hip roof building roof. The column-beam intersection node structure comprises a circular-pipe steel standing column (1) and four H-shaped steel bracket connectors and is characterized in that the four H-shaped steel bracket connectors are arranged in a crisscross manner and are welded to the outer wall of the top end of the circular-pipe steel standing column; the H-shaped steel bracket connectors include two planar upper-flange H-shaped steel bracket connectors (4) and two slope upper-flange H-shaped steel bracket connectors (7), the planar upper-flange H-shaped steel bracket connectors (4) are respectively welded to the outer sides of the highest point and the lowest point of the slope of the top end of the steel standing column, the slope upper-flange H-shaped steel bracket connectors (7) are respectively welded to two sides of the steel standing column and are vertical to the planar upper-flange H-shaped steel bracket connectors, and the upper flanges of the slope upper-flange H-shaped steel bracket connectors incline along the roof; an elliptical slope inner support plate (6) is welded to the top end in the steel standing column, and a circular horizontal support plate (5) is welded into the steel standing column. By the column-beam intersection node structure, the circular-pipe steel standing column can be well assembled to a steel oblique beam and a steel crossbeam.

The invention discloses a method for improving the firmness of combination of a dye-sensitized cell nanometer fibrous membrane and conductive glass. The method comprises the following steps of: (1) spin coating a thin transition layer on the conductive glass before fiber deposition, wherein the thin transition layer is made of spin-coating liquid which has the same elements and higher viscosity compared with a TiO2 precursor spinning solution; (2) adding a proper amount of surfactant triton to the spin-coating liquid and the spinning solution; and (3) processing sintered TiO2 nanometer fibrous membrane with a TiCl4 aqueous solution. Under the synergic action of the three steps above, the firm combination of the TiO2 nanometer fibrous membrane prepared by an electrostatic spinning technology and an FTO (Fluorine-doped Tin Oxide) conductive glass substrate is realized, a key technical problem of application of the electrostatic spinning technology to preparation of a photoanode of a dye-sensitized solar cell is solved, and performances and stability of a deice are improved.

The invention discloses a car body-in-white welding spot positioning method and device based on robot visual servo. The method comprises the steps that a partial car body image with body-in-white welding spots is collected and stored in a storage unit, and the image is read from the storage unit; the image is preprocessed; edge extraction is performed on the preprocessed image; the position coordinates and radius sizes of the car body-in-white welding spot or circular hole targets in the image are acquired by utilizing random Hough transformation; a target image is intercepted, feature extraction and classification recognition are performed on the target image, and a positioning coordinate is obtained and transmitted to a robot control system. According to the car body-in-white welding spot positioning method and device, quick and automatic recognizing and positioning of a car body-in-white welding spot quality detection robot on the body-in-white welding spots to be detected are achieved, the car body-in-white welding spot quality detection robot can be guided to accurately position the body-in-white welding spots, and the key technical problems are solved for achieving intelligent detection of the car body-in-white welding spot quality detection robot on the welding spot quality on a car industry manufacturing production line.