36results about How to "Efficient injection" patented technology

The invention discloses a three-dimensional directivity target segmentation method of an image enhancement prompt decoding network. The method comprises the following steps: S1, feature extraction; s2, generating a multi-view semantic embedding strategy and query; s3, prompting the perception decoder; s4, training loss: training loss comprises basic loss, probability loss and comparative learning loss; according to the method, the reasoning ability of the model is released by using multi-view images and task-driven information from top to bottom; the MSE uses CLIP to extract two-dimensional image features, and then the two-dimensional image features are fused with three-dimensional point cloud features to significantly enhance visual features; a PAD uses a task-driven prompt signal to guide a decoding process, through a task-driven prompt module, a prompt emphasizing correlation between each query and a text is generated, task-specific information is effectively injected into a model, and learning complexity is remarkably reduced.

The invention relates to the technical field of artificial intelligence interpretability, and discloses a neuron correction-based large language model cue word attack prevention method, which comprises the following steps of: constructing an attack cue word data set, and rewriting attack cue words to obtain a contrast cue word data set consisting of contrast cue word data; constructing a probe, obtaining output values of all neurons in the large language model during reasoning, and further obtaining a neuron activation state of the large language model; inputting the attack cue word and the corresponding contrast cue word into a large language model, and summarizing the obtained neuron activation state table to obtain an additional activation neuron corresponding to the attack cue word; and inputting cue word attack data into the large language model, and forcibly zeroing the output of one or more neurons in the additional activation neurons. By correcting the key neurons, the model performance and the prevention effect are balanced, and the security of the large language model is improved.

The invention discloses an in-situ visual remediation method based on a high-pressure jet grouting agent migration behavior model, which is characterized by comprising the following steps: (1) establishing an agent migration behavior model for in-situ remediation of contaminated site soil based on high-pressure jet grouting, and obtaining a formula of the diffusion radius of a remediation agent; (2) on the basis of the established medicament migration behavior model, carrying out scientific and precise remediation on the polluted soil; and (3) in-situ visual repair based on a high-density resistivity imaging technology.

The application provides a downhole supercritical carbon dioxide fracturing coal rock device and a construction method, which comprises a coal seam, a fracturing borehole, a hole blocking section, a hole sealing section, a fracturing section, a monitoring hole, a fracturing system, a temperature control system, a grouting system, a liquid carbon dioxide pressurizing system, a proppant mixing system, an extraction system and a data collector; the fracturing borehole is arranged on the coal seam and comprises the hole blocking section, the hole sealing section and the fracturing section; a plurality of monitoring holes are arranged on the coal seam and are spaced apart in the circumferential direction of the fracturing borehole; and the fracturing system is connected with the temperature control system. The proppant mixing system can improve the performance of the liquid carbon dioxide carrying proppant mixture, so that the proppant mixture effectively enters the fracturing fracture and maintains good flow conductivity. The temperature control system overcomes the difficulty in preparation of downhole supercritical carbon dioxide and can realize injection of carbon dioxide in a supercritical state into the fracturing coal seam.

The application discloses a heterogeneous solution ground volumetric distribution stepless adjusting device and a use method, and the device comprises a reciprocating mechanism and a hydraulic reversing mechanism; the hydraulic reversing mechanism comprises a sleeve base and a reversing shaft base, a hydraulic unit is arranged in the sleeve base, a reversing unit is arranged in the reversing shaft base, the hydraulic unit and the reversing unit are connected through an intermittent mechanism, and the reversing shaft base is communicated with the sleeve base; the reciprocating mechanism is connected with the reversing unit, and the reciprocating mechanism leads out an output shaft and is used for connecting a damping device. The volumetric structure is adopted to suck and discharge the heterogeneous solution, the shearing of polymer molecules and particles in the injection liquid in the heterogeneous solution injection process is reduced, the viscosity of the heterogeneous solution is ensured, and low-shearing injection is realized.

A visible near-infrared laser light source comprises: a pump laser generating module, which is suitable for generating pump laser; a seed laser generating module, which is suitable for generating seed laser, wherein the seed laser is in the visible near-infrared laser band; a cavity mirror module, which comprises: a resonant cavity, which is suitable for receiving the pump laser and the seed laser; a nonlinear optical crystal, which is located in the resonant cavity and is suitable for causing the pump laser to undergo nonlinear conversion to generate coherently superimposed signal light, wherein the seed laser is suitable for guiding the nonlinear conversion process so that the wavelength of the obtained signal light is the same as that of the seed laser; the signal light oscillates in the resonant cavity and is output, thereby obtaining the visible near-infrared laser; and a control module, which is suitable for controlling the wavelength of the seed laser generated by the seed laser generating module.

The utility model discloses a cooling liquid spray head for a lathe, which comprises a barrel-shaped spray head shell, a screwed joint fixedly connected to one end of the spray head shell, six fixed hinged pipes which are uniformly and fixedly arranged on the outer side surface of the spray head shell and of which the two ends are communicated with the spray head shell, and six water spray pipes which are respectively hinged and connected with the hinged pipes, a movable hinged pipe rotationally arranged on the fixed hinged pipe in a sleeving mode is fixedly arranged in the water spraying pipe, the two ends of the movable hinged pipe communicate with the exterior of the water spraying pipe, and water spraying holes are formed in the water spraying pipe and located in the side, away from the side wall of the sprayer shell, of the water spraying pipe and close to the end, away from the movable hinged pipe, of the water spraying pipe; a first water outlet hole and a second water outlet hole which are consistent in size are formed in the side wall of the fixed hinge pipe and the side wall of the movable hinge pipe correspondingly. The utility model has the following advantages and effects: the spray head is not easy to block, and the spray area, the spray angle and the spray position of the spray head can be adjusted to a certain extent.

The application relates to the fire-fighting monitoring technical field and discloses a fire extinguishing device arranged on a slide rail network in a site, which comprises a fire source signal detecting module, a calculation processing module and a fire extinguishing spraying module. The fire source signal detecting module is used for detecting the fire source signal in the site. The calculation processing module is electrically connected with the fire source signal detecting module, and the calculation processing module is used for receiving the fire source signal. The fire extinguishing spraying module is arranged on the slide rail network in a sliding mode, the fire extinguishing spraying module carries multiple fire extinguishing mediums with different densities and can spray the fire extinguishing mediums to the fire source. The fire extinguishing spraying module is electrically connected with the calculation processing module, the calculation processing module sends a control signal to the fire extinguishing spraying module according to the fire source signal, and the fire extinguishing spraying module adjusts the position thereof according to the control signal and sprays the fire extinguishing medium with the corresponding density. The fire extinguishing device can efficiently switch the fire extinguishing mediums with different densities and adjust the spraying angle of the fire extinguishing medium according to the different fire extinguishing mediums.

This invention discloses a gas-saving mechanism for a welding robot, relating to the field of welding technology. It includes a gas-saving housing with a gas-saving valve fixedly connected inside. An electromagnetic device is mounted on the outside of the gas-saving valve, and the interior of the gas-saving valve is connected to the interior of the electromagnetic device. A magnetic rod is mounted at the connection point between the electromagnetic device and the gas-saving valve. A spring is fixedly connected inside the gas-saving valve, and a sealing plate is fixedly connected to the end of the spring away from the connection with the gas-saving valve. Through the instantaneous release of the elastic potential energy of the spring, an impact block instantaneously impacts a limiting rod. The impact on the limiting rod is transmitted to the impact rod, and this impact force is then transmitted to the sealing plate. The instantaneous impact loosens the sealing plate, preventing accidental jamming that could prevent effective opening and closing. This ensures the accuracy of gas emission and avoids situations such as insufficient gas leading to high temperatures at the welding position during welding, thus improving welding efficiency.

The invention provides an organic compound, an organic electroluminescent material and application thereof, the organic compound has a structure as shown in a formula IA or a formula IB, through the design of a molecular structure, the organic compound has a specific spatial configuration, the overall plane conjugacy of the molecular structure is better, electrons and holes can be effectively transmitted and injected, and the organic electroluminescent material can be applied to the field of organic electroluminescent devices. And excellent carrier mobility and photoelectric properties are shown. The organic compound is used for the organic electroluminescent device, is especially suitable for being used as a main body material, has excellent carrier transmission performance, is beneficial to exciton energy transmission between the main body material and a dye, and can effectively improve the luminous efficiency of the device, reduce the driving voltage and prolong the service life, so that the device has better comprehensive performance; and the requirements of the current panel and display manufacturing industry on high-performance organic materials are met.

An organic electroluminescence device comprises an anode, a cathode and an organic layer formed between the anode and the cathode, the organic layer comprising a hole injection layer, a hole transport region, an electron blocking layer, a light emitting region, an electron transport region; the hole transport region comprises a first material and a second material, the first material and the second material are sequentially evaporated to form two layers of hole transport layer, the first material is selected from the compound shown in formula 1; the second material is selected from the compound shown in formula 2. The first material with high refractive index is arranged as the first hole transport layer, the second material with low refractive index is arranged as the second hole transport layer, and the structure of the first material and the second material is limited respectively, through the comprehensive regulation of the material structure, the energy level and the refractive index of the double-layer hole transport layer, the limitations of single material or simple mixed material in the hole transport and the light emitting efficiency are overcome.

The invention relates to the field of offshore platform fire fighting, in particular to a fire extinguishing control system and method for a turbofan cannon. Comprising a controller used for analyzing field data and displaying images; the detection module is used for sensing the temperature, the image and the distance of a field fire, and the detection module is connected with the controller; the processing module is used for receiving the data from the detection module, analyzing and processing the data and then generating a driving instruction for the turbofan gun to aim at the fire, and the processing module is connected with the controller; when an offshore platform has a fire, the system can analyze flame characteristics of a fire area at the first time, filter interference of factors such as environment and wind power, position and aim at the fire center area, command a turbofan cannon to jet, adjust a fire extinguishing system in real time according to flow parameters of the turbofan cannon and flame motion characteristics, and improve the fire extinguishing efficiency of the offshore platform. Accurate fire recognition, accurate aiming, effective spraying and fire suppression can be achieved, the fire extinguishing precision is improved, and the fire extinguishing efficiency can be further improved.

The utility model discloses a sparkling water machine and its inflation filter device, including connecting the gas delivery pipeline of gas outlet joint and gas inlet joint, gas outlet joint with gas bottle in sparkling water machine, gas inlet joint with water bottle, the gas delivery passage from gas bottle to water bottle is provided with at least one filter piece. According to the utility model, the air inflation filtering device is arranged on the air transmission channel between the air bottle and the air inflation rod, and impurities or ungasified carbon dioxide solids are filtered through the air inflation filtering device, so that the carbon dioxide can be effectively injected into the water bottle, and the bubble water is efficiently prepared. The air inflation filtering device can be arranged at an inlet of the air inflation rod, or the middle of the air inflation rod is arranged on the air conveying pipeline, or the air outlet connector, or the connector of the air cylinder connecting base and the air cylinder.

The invention relates to the field of fireproof roller shutters, in particular to an intelligent hydrometallurgy extraction separation section fire extinguishing system which comprises a fire hazard robot automatic patrol system, a fire hazard and automatic fire disposal system and a pollutant collection system in the fire disposal process. The fire hazard and automatic fire disposal system comprises a rail type fire extinguishing robot and a fireproof roller shutter isolation fire extinguishing device, the fireproof roller shutter isolation fire extinguishing device comprises a roller shutter mechanism applied to the periphery of a hydrometallurgy extraction tank, and the roller shutter mechanism comprises a frame, a first shutter piece and a second shutter piece. The upper portion of the first curtain piece and the upper portion of the second curtain piece are each fixedly connected with a winding drum which is arranged on the frame and can rotate. The first curtain piece and the second curtain piece are unfolded through the winding drum, multi-layer protection is formed, a cooling space is created, meanwhile, the rail type fire extinguishing robot is activated according to fire behaviors, flame spreading is stopped, a fire disaster is extinguished, and the rail type fire extinguishing robot is particularly suitable for scenes with fire hazards in adjacent areas such as a hydrometallurgy extraction line.

The application discloses a perovskite solar cell electron transport layer and a preparation method and application thereof, and relates to the technical field of solar cell preparation. The method comprises the following steps: adding O-phospho-L-threonine into a SnO2 colloidal aqueous solution, and performing ultrasonic treatment to obtain a PT-doped SnO2 solution; and coating the PT-doped SnO2 solution onto the surface of a substrate to form a perovskite solar cell electron transport layer. The unique molecular structure of O-phospho-L-threonine (PT) is utilized to realize a multiple synergistic modification effect, and the device performance is improved. The preparation process is simple. The application solves the problems of the existing perovskite solar cell, such as many defects of the electron transport layer, poor interface energy level matching, serious charge recombination and poor device stability.

The invention discloses a gallium nitride device and a preparation method thereof, and relates to the technical field of semiconductor devices. The gallium nitride device comprises a sapphire substrate, an AlN nucleating layer, an N-type AlGaN buffer layer, an intrinsic AlGaN active layer, an electron blocking layer and a P-type AlGaN layer which are sequentially stacked from bottom to top, a gradient doping edge stop layer is arranged on the edge of the P-type AlGaN layer, and meanwhile a bottom electrode in ohmic contact with the N-type AlGaN buffer layer and a top electrode in ohmic contact with the P-type AlGaN layer are formed respectively. According to the invention, by optimizing the structural design of the substrate, the nucleating layer, the buffer layer, the active layer, the electron blocking layer, the edge termination layer and the electrode, and combining with the seagull optimization algorithm to accurately regulate and control the preparation process parameters, the comprehensive improvement of the light extraction efficiency, the carrier recombination efficiency, the breakdown voltage and the long-term working stability is realized; and the photoelectric property and the reliability of the gallium nitride device are obviously enhanced.

The utility model provides a potato chip cutting device, which belongs to the technical field of potato slicing, and is characterized in that the potato chip cutting device comprises a plurality of rows of cutting knives used for cutting potato chips, the top of each cutting knife is provided with a flushing device, and the flushing devices are used for impacting the potato chips attached to the cutting knives; the flushing device comprises a flushing tank, a water pump and a spraying head, the flushing tank is used for storing water, the water pump is in a cuboid shape, located at the tops of the cutting knives and used for improving the water pressure of the flushing tank, and the spraying head is located on the side walls of the multiple cutting knives and used for spraying water in the flushing tank to the cutting knives; the longitudinal section of the cutting knife is distributed in a bilateral symmetry mode, the 1 / 2 position of the bottom of the right end of the section is divided into three sections, each section is an arc with the radian of 45 degrees, and the circle centers of all the arcs are located on the same straight line. The potato slicing knife can solve the problem that potato slices are attached to the knife in the potato slicing process.

The invention discloses Cd-As combined contaminated soil in-situ remediation equipment based on iron modified biochar. The Cd-As combined contaminated soil in-situ remediation equipment comprises a vehicle-mounted driving structure, a grooving mechanism arranged on the vehicle-mounted driving structure, a biochar adsorption mechanism and a backfilling mechanism. The vehicle-mounted driving structure comprises a vehicle-mounted supporting plate and a plurality of crawler-type driving wheel sets connected to the bottom of the vehicle-mounted supporting plate. The grooving mechanism comprises a chain wheel supporting frame connected to the side face of the vehicle-mounted supporting plate and two grooving driving chain wheels rotationally connected to the chain wheel supporting frame, a grooving driving chain is in transmission connection between the two grooving driving chain wheels, and a plurality of grooving buckets are fixed to the outer side of the grooving driving chain; the charcoal adsorption mechanism comprises a positive pressure circulation mechanism and a split module adsorption mechanism; the positive pressure circulation mechanism is used for forcing residual Cd and As elements in the soil to be dissolved out and horizontally and transversely migrated, and then the split module adsorption mechanism is used for adsorbing and filtering a solvent in which Cd and As are dissolved, so that the Cd and As elements in the soil are removed.

The ballast bed spraying device comprises a water tank and two water outlet pipelines arranged at the bottom of a vehicle body side by side, a plurality of nozzles are arranged on each water outlet pipeline side by side, one end of each water outlet pipeline is open, the other end of each water outlet pipeline is closed, and the open end of each water outlet pipeline is communicated with the water tank through a connecting pipe. After the connecting pipe is connected out of the water tank, a water pump, an electromagnetic valve and a flow meter for detecting the water flow in the pipeline are sequentially arranged on the pipeline; the water pump is controlled by a motor; the controller is used for collecting signals of the flow meter and further controlling the rotating speed of the motor and on-off of the electromagnetic valve; one of the water pumps on the two connecting pipes is a small-displacement water pump, and the other water pump on the two connecting pipes is a large-displacement water pump. The two water pumps adopt a large displacement configuration and a small displacement configuration, so that not only can high-precision variable control in a small displacement range and a medium displacement range be met, but also high-precision variable control in a large displacement range during full displacement output of the two water pumps can be met.

This invention discloses an organic electroluminescent device and display device. The organic electroluminescent device includes an anode, a cathode, and at least one light-emitting layer formed between the anode and the cathode. A hole injection layer and a hole transport region are provided between the anode and the light-emitting layer closest to the anode. The hole transport region includes a first hole transport layer and a second hole transport layer with different refractive indices. The first hole transport layer is selected from compounds of Formula 1 or Formula 3, and the second hole transport layer is selected from compounds of Formula 2. This invention's organic electroluminescent device, through improvements in film structure and material matching, ensures both material stability and carrier transport, while simultaneously improving the light field distribution through optimized optical microcavity structure, thus achieving performance enhancement. [Formula 1] [Formula 2] [Formula 3]

The present application belongs to the technical field of long-distance natural gas pipeline engineering, and discloses a mobile pipeline gas recovery equipment. The equipment comprises a mobile platform and a natural gas compressor set. The natural gas compressor set is installed on the mobile platform and comprises a natural gas engine and a compression mechanism. The compression mechanism can access the residual natural gas in the working pipeline and supply a part of the residual natural gas to the natural gas engine as fuel after increasing to a preset pressure. The natural gas engine drives the compression mechanism to continuously operate to inject the pressurized natural gas into the downstream pipeline through a second interface. The equipment can be flexibly moved in a wide range to complete the recovery of residual natural gas in the working pipeline, reduce greenhouse gas emissions, and use the residual natural gas as energy, which is beneficial to meet the operation requirements of uncertain recovery locations and field operations. The compression mechanism overcomes the defect that the pressure of the residual natural gas decreases with discharge, reduces the venting volume, and improves the recovery efficiency of the pipeline gas.

The application belongs to the technical field of aero-engines, and discloses an aero-engine combustion chamber main combustion stage fuel nozzle and a fuel control method. The aero-engine combustion chamber main combustion stage fuel nozzle comprises a same center axis, a duty class fuel nozzle, a swirler and a main combustion stage fuel nozzle which are sequentially sleeved from inside to outside, and the outlet of the main combustion stage fuel nozzle is sleeved with a sleeve. The fuel control method ensures that the fuel jet flow of the duty class fuel nozzle is unchanged, the swirler rotates around the duty class fuel nozzle, the fuel jet flow of the main combustion stage fuel nozzle is adjusted, and then the total fuel jet flow of the aero-engine combustion chamber main combustion stage fuel nozzle is changed. The fuel control method of the aero-engine combustion chamber main combustion stage fuel nozzle realizes efficient fuel injection under different working conditions, guarantees the combustion efficiency and stability of the combustion chamber, controls the combustion temperature distribution of the main combustion zone, and reduces the pollutant emission of the combustion chamber.

The present disclosure provides a structured data semantic representation method, which can be applied to the technical fields of natural language processing, structured data semantic representation and large model. The method comprises the following steps: inputting structured data into a target structure semantic representation model; using a structure feature extractor based on a graph neural network to encode and extract the structure information in the structured data to obtain a structure representation of the structured data; using a text feature extractor to encode and extract the text information in the structured data to obtain a text representation of the structured data; and fusing the structure representation and the text representation to obtain a semantic representation of the structured data, wherein the structured data comprises at least one of a knowledge graph, a table and a data record. The present disclosure also provides a structured data semantic representation device, equipment and medium.

The invention provides a cooperative grouting disposal method for a large-diameter shield tunnel in an upper-soft and lower-hard stratum, and relates to the technical field of tunnel grouting processes. The cooperative grouting disposal method for the large-diameter shield tunnel in the upper-soft and lower-hard stratum comprises the construction steps that S1, the geology of the grouting position is investigated; S2, grouting parameters are managed, including slurry preparation, S3, grouting equipment debugging, S4, grouting, S5, grouting working condition analysis, S6, secondary grouting and S7, the grouting effect is judged. According to the prepared superfine cement and water glass double-liquid slurry, the solidification time and the volatilization strength of the grouting liquid can be changed through the additive, so that the grouting liquid is suitable for various complicated geological conditions and engineering requirements of shield tunnels, the gelation time is adjusted according to specific conditions, and the optimal grouting effect is achieved.

The application relates to an ultra-low-power nanometer floating gate 3D NAND structure, which comprises a substrate, a stack structure arranged on the substrate, the stack structure comprising a plurality of first insulating medium layers and nanometer floating gate storage structures which are alternately stacked, a plurality of through holes penetrating through the stack structure, a tunneling medium layer and a center channel layer being sequentially arranged on the sidewall of each through hole, and a center insulating medium layer being filled in the center channel layer; the nanometer floating gate storage structure is vertically arranged with the tunneling medium layer of the sidewall of the through hole, a second insulating medium layer and a blocking medium layer are sequentially arranged in the direction from the tunneling medium layer to the outside of the through hole, a gate word line metal is embedded on the outside of the blocking medium layer, and a nanometer floating gate layer is arranged below the second insulating medium layer and part of the blocking medium layer. The structure can effectively inhibit charge coupling interference and reduce working voltage and power consumption while further reducing the word line spacing to realize high-density size miniaturization.

The invention discloses a composite photocatalytic material with excess sludge as a carrier and a preparation method and application thereof.Porous conductive carbon obtained after carbonization and acid pickling of the excess sludge serves as a framework of the material, a core-shell structure unit composed of a CdS nanometer core and a C3N5 shell layer grows on the surface of the framework in situ, and an S-schema heterojunction is formed. The preparation method mainly comprises three steps of carbonization and purification of sludge, hydrothermal in-situ growth of CdS and vapor deposition wrapping of a C3N5 shell layer. The material fully utilizes the charge separation advantage of a conductive network and heterojunction of sludge carbon, shows excellent hydrogen evolution activity and stability under visible light, realizes high-value utilization of excess sludge, and provides a new material for efficient and low-cost photocatalytic hydrogen production.

The utility model provides an anti-coking device for a settler, which belongs to the technical field of settler plates and comprises an overflow hopper arranged at the lower part of a coarse spinning dipleg and positioned at the inner bottom of the settler; an upper overflow opening is formed in the top end of the overflow hopper, a lower overflow opening is formed in the bottom end of the overflow hopper, and the lower portion of the rough spinning leg extends into the overflow hopper through the upper overflow opening; a superheated steam fluidization ring pipe is arranged at the inner bottom of the overflow hopper, and a nozzle is arranged on the superheated steam fluidization ring pipe; the superheated steam fluidization loop pipe is connected with a steam pipeline, one end of the steam pipeline is connected with the superheated steam fluidization loop pipe, and the other end of the steam pipeline penetrates through the overflow hopper and then is connected with a fluidization steam inlet formed in the upper portion of the settler. Through the measures of reasonable structural design, accurate flow control, wear resistance, condensation prevention and the like, oil gas entrainment can be effectively reduced, catalyst accumulation and coking are prevented, the separation efficiency is improved, the structural strength is high, maintenance is convenient and fast, and the operation cost is reduced.

The invention provides an arylamine compound and an organic electroluminescent device thereof, and particularly relates to the technical field of organic photoelectric materials. When the arylamine compound is used as a hole transport layer material, the arylamine compound has very high hole mobility and proper HOMO energy level, so that holes are effectively injected and transmitted between an electrode / organic layer interface and an organic layer / organic layer interface; when the material is used as a covering layer material, light loss caused by reflection of nearby electrodes during light emitting can be reduced, the light emitting efficiency of a device is further improved, and the service life is prolonged; when the compound is used as a charge generation layer material, light-emitting layers can be connected in series, so that a device has higher light-emitting efficiency and longer service life, the preparation method of the compound is simple, raw materials are easy to obtain, and the compound can be widely applied to the fields of panel display, illumination light sources, organic solar cells, organic photoreceptors or organic thin film transistors and the like. Good application effects and industrialization prospects are realized.

This utility model relates to the field of percutaneous lumbar puncture technology, specifically a percutaneous lumbar puncture device, including a curved puncture needle with an outer diameter of 2.1 mm and 1.2 mm, and a length of 20 cm. A puncture assembly is provided on one side of the curved puncture needle, and a hollow guidewire is provided on the inner side of the curved puncture needle. The outer diameter of the hollow guidewire is 1 mm, and the length of the hollow guidewire is... The hollow guidewire is 25cm long, and one end of the hollow guidewire is equipped with a 1.5cm metal strip for visualization. The opening of the needle tip of the curved puncture needle of this invention is recessed by 2mm, that is, changed to a side hole, to ensure that when the needle tip touches the posterior edge of the vertebral body, the hollow guidewire can be smoothly passed through the side hole. The length of the curved puncture needle is extended to 20cm to ensure that most lumbar punctures can be fully inserted. The hollow guidewire tip is designed with a 1.5cm metal strip for visualization, which is visualized under intraoperative C-arm X-ray fluoroscopy to help with positioning.

The invention is suitable for the field of perovskite photoelectric devices, and provides a perovskite light-emitting diode based on an organic interface modification layer. The structure of the device sequentially comprises an anode ITO substrate, a hole transport layer, an organic interface modification layer, a perovskite layer, an electron transport layer, an electrode modification layer and a metal electrode from bottom to top. And the organic interface modification layer is made of 1, 3-dicarbazole-9-yl benzene molecules. According to the invention, 1, 3-dicarbazole-9-yl benzene molecules with a deep HOMO energy level are introduced between the hole transport layer and the perovskite layer to optimize the carrier transport property and energy level alignment of the hole transport layer, so that effective carrier injection and transport are realized, and exciton quenching at an interface is inhibited. In addition, 1, 3-dicarbazole-9-yl benzene molecules can also interact with a lead octahedron to fill lattice gaps, stabilize a perovskite structure and effectively inhibit generation of defects. Based on the organic interface modification material, the photoelectric property of the perovskite layer is improved, and the device performance is also effectively improved.