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342results about How to "Guaranteed long-term stability" patented technology

Temperature correction method and correction system for hot press

The invention discloses a temperature correction method and system for a hot press, and particularly relates to the technical field of hot press temperature control, and the method comprises the steps: obtaining and preprocessing multi-dimensional operation data, including a temperature time sequence, pressure setting and material attributes; constructing a coupling model based on the multilayer neural network, and predicting temperature distribution of different process stages; performing sensor drift compensation, analyzing temperature deviation characteristics, judging whether sensor drift or material thermal diffusion abnormity exists or not, and generating a local distortion mark; determining a compensation mode according to the distortion mark, and starting a local compensation mode or a global balance control mode if the distortion is recognized as over-limit distortion; and comparing with the output of the coupling model, verifying the temperature correction effect, and if the deviation is reduced and the distortion mark is converged, outputting a stable temperature correction result. The problems of temperature distortion and sensor drift are effectively solved, and the long-term precision and stability of the hot press under complex working conditions are improved.
Owner:WUXI HUASHENG HEAVY IND TECH CO LTD

Construction method of long-pile wharf pile foundation lateral displacement prediction model

The invention relates to the technical field of pile foundation engineering, in particular to a construction method of a long-pile wharf pile foundation lateral displacement prediction model. The method comprises the following steps that displacement, stress and load parameter monitoring is conducted on a pile foundation of the high-pile wharf, and real-time monitoring parameter data is generated; performing working condition identification on the pile foundation structure through the real-time monitoring parameter data to generate working condition data of the pile foundation structure; multi-source load characteristic analysis is conducted on the pile foundation structure working condition data, load coupling effect calculation is conducted, and load action data are generated; performing soil-pile interaction analysis according to the load action data to generate soil-pile response data; and performing material performance deterioration evaluation according to the soil-pile response data to generate material state data. The working condition identification method based on the multi-source monitoring data is established, comprehensive perception of the pile foundation structure state is achieved, and a reliable data basis is provided for subsequent displacement prediction.
Owner:CCCC GUANGZHOU DREDGING CO LTD +1

Automatic powder loading device based on visual identification

The invention relates to the technical field of automatic loading and logistics control, in particular to an automatic powder loading device based on visual identification, which comprises a visual identification module, a flexible grabbing module, a transfer module and a stacking module, the form, internal distribution and material characteristic data of the powder bag are obtained through a multi-mode sensor, a grabbing path is generated, and grabbing operation is completed through a flexible manipulator; the transfer module dynamically adjusts the transportation state of the powder bag in combination with path optimization and posture monitoring; the stacking module monitors stress of a stacking layer in real time on the basis of the stacking thermal distribution diagram, adjustment suggestion data are generated, stacking position and angle optimization is completed through a self-correction unit, and the stability of a stacking structure is ensured; the powder loading efficiency, the stacking precision and the long-term stability are remarkably improved, and the method is suitable for efficient logistics management of complex loading scenes.
Owner:HANGZHOU YUNTIAN SOFTWARE CO LTD

Intelligent temperature control method and device of multi-chip stacking structure and computer equipment

The invention relates to the technical field of chip stacking, and discloses an intelligent temperature control method and device of a multi-chip stacking structure and computer equipment. The method comprises the following steps: acquiring target temperature data of each layer of chip in a multi-chip stacking structure, and establishing a nonlinear temperature response model; constructing a hierarchical control framework, and inputting the target temperature data into an agent auxiliary temperature control algorithm for processing to obtain temperature distribution characteristic data; performing optimal sampling analysis to obtain local temperature regulation and control parameters; constructing a temperature-flow multi-stage coordination control model, and generating a cooling liquid flow distribution scheme and a flow direction control instruction; the flow and temperature of cooling liquid are controlled, gradient cooling treatment is conducted on the temperature abnormal area, and temperature adjusting process data are obtained; and carrying out multistable distribution analysis to generate a temperature control optimization strategy. According to the invention, the problem of temperature balance in a multi-chip stacking structure is effectively solved.
Owner:SHENZHEN MINGRUIDA HARDWARE PROD CO LTD

Advanced pressure relief construction method for ultra-deep vertical shaft of metal mine

The invention relates to the technical field of metal mine ultra-deep vertical shaft construction, in particular to an advanced pressure relief construction method for a metal mine ultra-deep vertical shaft, aims to solve the problems that the construction safety of a deep shaft is difficult to guarantee and the construction difficulty is high, and is used for a large-diameter vertical shaft with the depth exceeding 1500 m. The lithology and physical mechanics parameters of shaft surrounding rock are obtained by adopting methods such as shaft rock core logging, surrounding rock joint fissure investigation and rock mechanics tests; then mechanical properties of the shaft surrounding rock are analyzed, and shaft surrounding rock excavation disturbance stress field distribution characteristics are obtained; the supporting opportunity and the supporting thickness of the well wall concrete lining are determined, high stress accumulated in a rock mass is released through advanced pressure relief blasting, so that the stress state of the shaft surrounding rock of the non-lining section is actively regulated and controlled, the interaction between the shaft surrounding rock and the subsequent well wall concrete lining is weakened, and the construction difficulty is effectively reduced; various means such as shaft stratum transparency analysis and ground pressure disaster prevention and control early warning are adopted, and safety and high efficiency of digging and supporting construction of the ultra-deep shaft are guaranteed.
Owner:NORTHEASTERN UNIV CHINA +1

Map navigation method and system based on integrated navigation

The invention discloses a map navigation method and system based on integrated navigation, and particularly relates to the field of integrated navigation, comprising compass data acquisition, magnetic declination correction, map integration, navigation system data acquisition, navigation system data analysis and integrated navigation. According to the method, the precision and robustness of the navigation system are remarkably improved, different environments can be dynamically adapted, and the error influence is reduced; rich geographic information support is provided by presetting an electronic map and POI marks; the real-time navigation service provides visual road condition information and path planning, the user experience is enhanced, and on the whole, more accurate, reliable and convenient navigation service is provided for the user.
Owner:HANGZHOU CLOUD AUTO PARTS TECH CO LTD

Distributed photovoltaic short-time output dynamic prediction method and system

The invention discloses a distributed photovoltaic short-time output dynamic prediction method and system. The method comprises the following steps: acquiring micro-meteorological data, a cloud picture image and historical output data of a target area; calculating a building shadow shielding coefficient, and generating shadow influence factor time sequence data; obtaining cloud image occlusion index time series data based on the cloud image and a pre-constructed cloud image occlusion prediction model; fusing the data, and constructing and training a short-time output dynamic prediction model based on a long short-term memory network; predicting photovoltaic output by using real-time data and the trained model, and adjusting the model according to a prediction error and a confidence interval; according to the method provided by the invention, various factors such as microclimate, building shadow and cloud layer shielding are comprehensively considered, and the complex nonlinear relationship between the factors and the photovoltaic output is captured by using the deep learning model, so that the accuracy and robustness of distributed photovoltaic short-time output prediction are improved.
Owner:JIANGSU ELECTRIC POWER INFORMATION TECH

Intelligent control system and method for photovoltaic panel production and processing

The invention discloses an intelligent control system and method for production and processing of a photovoltaic panel, and relates to the technical field of intelligent control. During operation of the system, key data involved in the production process of the photovoltaic panel is collected, a light-transmitting effect data set, a durability data set and an electrical performance data set are generated and preprocessed, and a multivariate data analysis algorithm is applied to obtain a data set; and after calculation, obtaining a quality index Zlzs of the agricultural photovoltaic panel, receiving an analysis result of the data processing module, and performing real-time quality monitoring on the photovoltaic panel subjected to production process optimization by adjusting a material ratio, production environment parameters and a process flow. A quality index Zlzs of an agricultural photovoltaic panel is compared with a preset first quality qualification threshold value M and a preset second quality qualification threshold value N, potential quality problems in production are identified, a quality evaluation strategy scheme is obtained, an evaluation result is fed back to a production process optimization module and a data processing module, and a closed-loop control system is formed. And continuous optimization and quality improvement are realized.
Owner:QINGDAO XINGRUIBO MACHINERY MANUFACTURING TECHNOLOGY CO LTD

Flexible ecological comprehensive supporting system for expansive soil side slope

The invention belongs to the technical field of rock-soil side slope protection, and particularly relates to an expansive soil side slope flexible ecological comprehensive supporting system which comprises an intercepting ditch, a vegetation protection layer, a composite waterproof layer, flexible anchor rods, water seepage and drainage pipes, cultivation and planting soil, a drainage ditch, a backfill soil layer, a step-shaped slope surface, a slope surface and slope protection vegetation. The slope surface is excavated into a step-shaped slope surface, a composite waterproof layer, expansive soil backfill soil, a vegetation protection layer and cultivation and planting soil are sequentially arranged on the step-shaped slope surface from bottom to top, and slope protection vegetation is planted and formed on the cultivation and planting soil; the composite waterproof layer is fixed to the step-shaped slope face through the flexible anchor rods. The vegetation protection layer and the slope protection vegetation together reinforce the shallow soil body, and the composite waterproof layer and the flexible anchor rod play a role in absorbing and relieving the received expansive force. The method has an ecological greening effect, has the functions of common supporting of the shallow surface layer and the deep layer of the expansive soil slope, flexible reinforcement and expansion reduction and allowable generation of a small amount of deformation, is simple in construction and high in efficiency, and can realize long-term stability of the shallow surface layer and the deep layer of the expansive soil slope.
Owner:WUHAN ENGINEERING CO LTD OF CHINA RAILWAY SEVENTH GROUP

Production process of high-elasticity heat-resistant polyester yarn

The invention relates to a production process of a high-elasticity heat-resistant polyester yarn, which comprises the following steps: firstly, selecting high-molecular-weight polyethylene glycol terephthalate, adding 1-3% of nano filler and 5-10% of functional copolymer, and drying at 150 DEG C for 4-6 hours to improve the stability and processability of the material; secondly, melt extrusion is conducted at 280-290 DEG C, spinning is conducted through a multi-section temperature control spinning head, and the fiber cooling uniformity is effectively controlled. Then, two times of drafting and a heat setting process are adopted, the orientation degree of a molecular chain is improved in one time of drafting, and low-temperature plasma treatment is combined to optimize the surface activity and the setting effect of the fibers. In the secondary drafting, the fiber deformation is finely adjusted at low temperature, the thermal damage is reduced, the elasticity is improved, and finally, xylanase treatment and ultraviolet curing are combined, so that the softness, the skin-friendly property and the weather resistance of the fiber are remarkably improved.
Owner:HANGZHOU LINGANG CHEM FIBER CO LTD

Chemical mechanical polishing and planarization system

ActiveCN222589301UHelps with local area modificationsolve the ruptureWaferMaterials science
The utility model discloses a chemical mechanical polishing and planarization system, which at least comprises a polishing head. A plurality of air holes are formed in the lower surface of the hard disc, and a third air cavity communicated with the air holes is formed in the hard disc; at least part of the elastic unit is of an annular structure, the elastic unit is connected with the polishing head body and the hard disc, and a second air cavity is defined by the polishing head body, the elastic unit and the hard disc; a retaining ring; when the third air cavity is in a negative pressure state, the lower surface of the hard disc can make contact with and adsorb the wafer substrate, and the pressure in the second air cavity is controllable, so that the elastic unit is driven to flexibly move, the hard disc and the wafer substrate are assisted to float, and chemical mechanical polishing of the wafer substrate is achieved. The hard drive in the hard disc solves the problem that when the flexible film drives the wafer substrate to polish, the flexible film is pulled to cause fracture or elastic modulus change under the severe polishing condition, and the service life of the flexible piece is prolonged.
Owner:HANGZHOU ZHONGGUI ELECTRONICS TECH CO LTD

Modified fiber mining filling material and preparation method thereof

ActiveCN119528526Aearly hardeningQuick set upSolid waste managementFiberClinker (waste)
According to the modified fiber mining filling material and the preparation method thereof provided by the invention, through a dual modification technology of plasma treatment and a silane coupling agent, the uniform dispersity of fibers in a cementing agent is enhanced, and the properties such as rapid hardening, early strength and compressive strength retention rate of the filling material are remarkably improved. The filling material comprises cement clinker, solid waste, a retarder, an early strength agent, modified fibers, an accelerator, gypsum, a water reducing agent, a suspending agent and other raw materials, the modified fibers are treated through specific steps, surface functional groups are increased, and the compatibility and binding power of the modified fibers and a cementing agent are improved. The filling material disclosed by the invention has the advantages of good transportability, simplicity and convenience in construction, low cost and environmental protection characteristic, conforms to the development trend of green mining industry, is particularly suitable for being applied to mine filling and supporting, and has wide application prospects and social and economic values.
Owner:XUCHEN MINING TECH DEV (XUZHOU) CO LTD

Biomedical magnesium alloy and preparation method thereof

PendingCN119640368AReduce peelingReduce the degradation rateAnodisationMicro arc oxidationUltimate tensile strength
The invention discloses a biomedical magnesium alloy and a preparation method thereof, and belongs to the technical field of magnesium alloy materials. The biomedical magnesium alloy comprises a magnesium alloy matrix, a micro-arc oxidation film layer is arranged on the surface of the magnesium alloy matrix, and a PLGA-HA composite coating is arranged on the surface of the micro-arc oxidation film layer. The micro-arc oxidation film serves as a magnesium alloy surface modification base layer, provides a good adhesion interface for the composite coating and enhances the corrosion resistance of a base body. By introducing the PLGA-HA composite coating on the micro-arc oxidation film on the surface of the magnesium alloy, the PLGA coats and stabilizes HA particles, so that the HA particles are distributed more uniformly, meanwhile, the bonding strength of the HA and the micro-arc oxidation film is improved, the stripping phenomenon of the coating is reduced, and the long-term stability of the coating is ensured. In addition, the composite coating further fills up pores and cracks of the micro-arc oxidation film, and the overall compactness and corrosion resistance are remarkably improved, so that the degradation rate of the magnesium alloy is effectively delayed.
Owner:SOLOMON (CHANGZHOU) ALLOY NEW MATERIAL CO LTD +1

Electric heating fabric and preparation method and application thereof

The invention provides an electric heating fabric and a preparation method and application thereof.The electric heating fabric comprises fiber cloth, an electric heating film is arranged on the surface of one side or two sides of the fiber cloth, the electric heating film has a wave-transparent function and is formed by curing conductive slurry, and the conductive slurry comprises resin, a dispersing agent, a carbon material, a functional compound and a solvent; the functional compound comprises a nitrogen-containing compound and / or an acidic compound; the specific functional compound is added into the preparation raw materials of the electric heating film, and the interface bonding performance between the electric heating film and the composite material is effectively improved by utilizing the cross-linking reaction between the functional compound and the resin in the composite material; therefore, the long-term stability and reliability of the obtained electric heating fabric and the integrated composite material thereof in an extreme use environment can be ensured, and the electric heating fabric has a wave-transparent function and is suitable for being applied to the surface of an aircraft.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Automatic auditing business process control method based on rule optimization

The invention discloses an automatic auditing business process control method based on rule optimization. The method comprises the following steps: S1, generating a unified auditing data pool; s2, constructing a multi-layer rule engine, and generating an initial rule set; s3, initializing an improved bee colony optimization algorithm, and dynamically defining a search space of a population; s4, dynamically optimizing the initial rule set by using an improved bee colony optimization algorithm, adjusting a single rule parameter in a search space in a worker bee stage, selecting an optimal rule direction in an observation bee stage, and introducing collaborative bees to optimize conflicts among multiple rules, and re-initializing a low-diversity population in a reconnaissance bee stage, and generating an optimized rule set; s5, generating a rule execution plan, adjusting the node priority of the auditing process and optimizing a task path; and S6, realizing continuous optimization iteration of the rule set and the audit process path based on implementation feedback of the rule execution plan. According to the invention, the multi-layer rule engine and the improved bee colony optimization algorithm realize automatic auditing business process control.
Owner:ANHUI YUNCHANG DATA TECH CO LTD

Automatic verification device and verification method for weighing coal feeder device

The invention discloses an automatic verification device and method for a weighing coal feeder device. The automatic verification device comprises a weight calibration system, a weight verification control system, a sensor calibration system and a weighing coal feeder. According to the invention, the weight of the standard weight most suitable for the current calibration requirement is dynamically calculated and selected through the weight calibration system based on historical data, environmental parameters and the like of the weighing sensor, so that the calibration precision and flexibility are greatly improved, and variable working condition requirements can be met; according to the invention, an automatic weight verification control system is designed, horizontal displacement, lifting adjustment and state switching of the weight are realized, and the calibration process is fully automatic; the output data of the sensor are collected in real time through the sensor calibration system, dynamic correction is carried out in combination with multiple times of weighing error calculation and historical data, drift and error trends of the weighing sensor are analyzed in real time in combination with parameters such as temperature, humidity and vibration, and error correction values are generated, so that the accuracy of weighing data is ensured.
Owner:INNER MONGOLIA DABAN POWER GENERATION CO LTD

Gas nanometer purifier

The invention relates to a gas nano purifier. The gas nano purifier comprises a mounting seat, the gas storage bin is installed on the installation base and used for storing clean gas, the side wall of the upper portion of the gas storage bin extends upwards to form an installation plate, and a gas path through hole is formed in the middle of the installation plate; the gas-water separator is mounted on the mounting plate and is used for carrying out primary purification on to-be-cleaned gas; the adsorption tower is mounted on the mounting plate and is used for carrying out secondary purification on the to-be-cleaned gas; gas to be cleaned sequentially flows through the gas-water separator and the adsorption tower and then enters the gas storage bin; the adsorption tower is communicated with the gas storage bin through an exhaust pipe; and the exhaust pipe penetrates through the gas path through hole. Through the arrangement, the installation operation is greatly simplified, and the integrity and the space utilization rate of equipment are improved.
Owner:HONGRIJIA DEPURATE FACILITY SCI & TECH CO LTD

Novel pouring forming equipment for cement pipe

InactiveCN119427527Aprevent movementAvoid uneven stress distributionShaping reinforcementsRebarMechanical engineering
The invention discloses novel cement pipe pouring forming equipment, and relates to the technical field of pouring equipment, the novel cement pipe pouring forming equipment comprises a supporting seat and a reinforcement cage body, a pouring inner mold and a pouring outer mold are arranged at the top of the supporting seat, the reinforcement cage body is placed between the pouring inner mold and the pouring outer mold, and a control assembly is arranged on the supporting seat. According to the novel pouring forming equipment for the cement pipe, periodic knocking treatment is conducted on the inner wall of the pouring inner mold through the knocking rods, high-frequency vibration is generated, the vibration effect in concrete is remarkably improved through the vibration, and therefore the concrete is fully compacted, bubbles in the concrete are effectively eliminated, and the concrete quality is improved. The reinforcement cage has important significance for improving the strength and durability of the cement pipe, the central position of the reinforcement cage body between the pouring inner mold and the pouring outer mold is ensured through an accurate adjusting and positioning mechanism, the reinforcement cage is prevented from moving in the pouring process, and the construction efficiency is improved. And the problem of non-uniform stress distribution caused by the fact that the position of the reinforcement cage deviates from the center is also avoided.
Owner:CHENGDE LIANLI CEMENT PROD CO LTD

Nano-carbon reinforced superfine cement-based blocking material as well as preparation method and application thereof

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a nanocarbon reinforced superfine cement-based blocking material as well as a preparation method and application thereof. The superfine cement-based blocking material prepared by the invention is prepared by uniformly mixing 45-50 parts of cement, 0.5-2.5 parts of a solid waste sintered active material, 0-0.05 part of a water reducing agent, 0.015-0.1 part of carbon nanotubes, 0.5-2.5 parts of a 1% solution of carbon quantum dots and 45-50 parts of water. The material has relatively low porosity and is not dispersed; the high groutability is achieved, and the material can permeate into tiny holes; and it is guaranteed that the material has high strength, the crushed rock bonding and reinforcing strength is high, and the material has wide application prospects.
Owner:SHANDONG UNIV

Thermal power and energy storage combined deep peak shaving method for providing frequency reserve

The invention relates to a thermal power and energy storage combined deep peak shaving method for providing frequency reserve. The method comprises the following steps: inputting unit parameters, energy storage parameters, system parameters and new energy parameters; setting constraint conditions for the frequency standby power and the energy storage frequency modulation power of the thermal power generating unit; setting constraint conditions for balance of deep peak regulation output, total frequency modulation resources and frequency safety standards; establishing a scheduling model which integrates deep peak regulation and frequency regulation functions and contains an energy storage electric power system; and according to the constraint condition and the input parameter, solving the scheduling model, and obtaining an optimization system scheduling strategy for the deep peak regulation and frequency regulation function. Compared with the prior art, energy storage and thermal power supply frequency reserve and deep peak regulation are integrated into the power system dispatching model, a comprehensive dispatching scheme considering system frequency regulation and deep peak regulation while cost is considered is generated, the long-term stability of the system frequency is maintained, and the economical efficiency of the system is improved.
Owner:STATE GRID XINJIANG ELECTRIC POWER CO ECONOMIC TECH RES INST +2

Efficient plugging type micro-connection structure system of multi-core optical fiber and connection method thereof

The invention relates to the technical field of multi-core optical fiber connection, and provides a multi-core optical fiber high-efficiency plugging type micro-connection structure system and a connection method thereof.The system comprises a multi-core optical fiber connector body, an optical fiber plugging terminal, an optical fiber alignment auxiliary terminal and an optical fiber dynamic correction terminal; the multi-core optical fiber connector body is used for being connected with an optical fiber core of a multi-core optical fiber; the optical fiber plugging and unplugging terminal is used for realizing plugging and unplugging operation of the multi-core optical fiber connector body and the butt joint seat and simultaneously realizing mechanical alignment of the multi-core optical fiber connector body and the butt joint seat; the optical fiber alignment auxiliary terminal is used for assisting the multi-core optical fiber to realize micron-order alignment in the connection process through positioning and dynamic adjustment; the optical fiber dynamic correction terminal is used for correcting optical fiber connection offset caused by temperature change, stress and manufacturing errors in real time and maintaining the stability of the system. The method has the effect of improving the connection quality of the multi-core optical fiber.
Owner:ZHONGSHAN MEISU PHOTOELECTRIC TECH CO LTD

Permanent magnet synchronous motor parameter identification method based on adaptive forgetting factor

The invention relates to the technical field of motor control and parameter identification, and discloses a permanent magnet synchronous motor parameter identification method based on a self-adaptive forgetting factor, which comprises the following steps of: acquiring an input signal and an output signal of a permanent magnet synchronous motor in real time, and constructing a regression vector by using the acquired input signal and output signal; calculating the information entropy of the current moment according to the constructed regression vector; performing normalization processing on the information entropy, and calculating a forgetting factor at the current moment according to the normalized information entropy; and substituting the forgetting factor into a parameter updating formula of a recursive least square method for parameter identification. According to the method disclosed by the invention, the adaptive capacity to dynamic change of motor parameters can be improved, the interference of noise on identification precision is effectively suppressed, the credibility of an identification result is improved, and the robustness and long-term stability of a control system are ensured.
Owner:青岛本原微电子有限公司

Intersection protection construction method for intersecting shield

The invention provides an intersecting shield interval protection construction method, which belongs to the technical field of building construction, and comprises the following steps: firstly, excavating an open cut foundation pit at an intersection, arranging a cast-in-situ bored pile and a crown beam as an enclosure structure in the foundation pit, and arranging a steel support system at the same time. And after the enclosure structure is completed, the foundation pit is excavated to the designed depth, and reinforced concrete supporting piles and pile top beams are constructed. And on the basis, a reinforced concrete protection plate is poured to form a sheet pile structure type protection structure system. And finally, foundation pit filling is completed in a backfilling mode. Before the shield passes through the cross point, a test section is arranged to collect related construction data, and preparation is made for subsequent formal tunneling. And in the actual shield tunneling process, the tunneling speed and the soil bin pressure are controlled, and synchronous grouting is conducted. And after crossing the cross point, arranging closed rings in the front and back areas, and carrying out wall back grouting by adopting double-liquid slurry. And finally, a geological radar is used for detecting the cavity and repairing, and the problem of mutual influence in up-down close-distance crossed tunnel construction is solved.
Owner:CHINA CONSTR EIGHTH BUREAU DEV & CONSTR CO LTD +1

Suspension type spherical screen panoramic vision image processing system and method

The invention belongs to the technical field of spherical screen image processing, and particularly relates to an image processing system and method for suspension type spherical screen panoramic vision, and the system obtains the attribute and position information of a spherical screen and a plurality of projection devices through a spherical screen modeling module, constructs a spherical screen-projection integrated three-dimensional model, and precisely divides projection areas to correspond to the devices; the image processing module collects image sequences of different angles of the panoramic vision scene; the image splicing module uses feature point detection, a YOLO algorithm and a convolutional neural network to identify an overlapping region and discriminate a dynamic region, and obtains a dynamic pixel splicing line through a dynamic planning search algorithm; the image correction module constructs a projection mapping function, corrects geometric and optical distortion of the image, and optimizes a splicing effect through a splicing correction function; and finally, the multi-view output module projects the corrected image sequence to a corresponding area of the dome screen by using a plurality of projection devices, so that real-time dynamic splicing and monitoring are realized, and projection synchronization and image quality are ensured.
Owner:LION EXHIBITION (SHANGHAI) EXHIBITION SERVICE CO LTD

Full-size wind tunnel high-load blade

The invention discloses a full-size wind tunnel high-load blade, which relates to the technical field of wind tunnel equipment and comprises a metal blade root, a hollow main beam and a blade body, a main beam connecting section is arranged at one end of the metal blade root, and the side wall of the main beam connecting section is a first conical side wall surface; the large opening end of the first conical side wall face is closer to the end, provided with the main beam connecting section, of the metal blade root than the small opening end of the first conical side wall face. The hollow main beam is formed by wrapping a carbon fiber cloth layer; a blade root connecting section is arranged at one end of the hollow main beam and fixedly arranged on the main beam connecting section in a sleeving mode. The inner side wall of the blade root connecting section is a second conical side wall face, and the second conical side wall face is attached to the first conical side wall face. The blade body is made of a carbon fiber material; and the blade body is fixedly arranged on the hollow main beam. The lightweight design degree of the blade is improved, and the lightweight effect of the blade structure is achieved.
Owner:AVIC HUIYANG AVIATION PROPELLER

High-efficiency extraction device and extraction method for gas in low-permeability coal seam

The invention discloses a low-permeability coal seam gas efficient extraction device and extraction method, and relates to the technical field of gas extraction, the low-permeability coal seam gas efficient extraction device comprises a drilling well and further comprises an adjusting device, a sealing plate is fixedly installed on the inner wall of the drilling well, an extraction pipeline fixedly penetrates through the upper wall and the lower wall of the sealing plate, and extraction equipment is arranged at the top of the extraction pipeline; a moving pipe is slidably mounted on the inner wall of the extraction equipment, the adjusting device comprises an adjusting groove, a U-shaped frame, an adjusting rod, a moving ring, an adjusting hole, a placing groove, a cambered surface block, a cambered surface plate and a linkage plate, the moving pipe moves downwards to drive the moving ring to move downwards, and the moving ring moves downwards to scrape the inner wall of a drilling well so as to damage a microscopic coal seam structure of the inner wall of the drilling well. By scratching the coal seam surfaces with different depths, the microstructure of the coal seam can be destroyed, cracks of the coal seam are increased, and therefore the gas extraction efficiency is improved.
Owner:SHANXI SHANMEI GUOYUAN COAL MINE SAFETY TECH CO LTD

Modified and toughened PET (Polyethylene Terephthalate) endurance plate and preparation method thereof

The invention discloses a modified and toughened PET (polyethylene terephthalate) endurance plate and a preparation method thereof, and relates to the technical field of PET modification, the modified and toughened PET endurance plate is composed of a macromolecular prepolymer, a toughening modifier, a compatilizer, matrix PET resin and a nanoscale inorganic filler; the macromolecular prepolymer is introduced into a branched structure through a modified chain extender, so that the strength and toughness of the matrix are improved; the toughening modifier adopts an elastomer and a functional monomer for graft copolymerization, so that the impact property is improved; the compatilizer is prepared by condensing an oligomer and a surface coupling reagent, so that the interfacial compatibility is improved; the nano filler is subjected to surface modification, so that the impact resistance and thermal stability of the material are enhanced; according to the invention, component synergy is realized through a multi-stage mixing and segmented feeding process, functional components such as a flame retardant and a light stabilizer are further introduced, the flame retardance, weather resistance and aging resistance are remarkably improved, the defects of fragility and multi-component blending interface of traditional PET are overcome, and the composite material is widely applicable to the field of high-performance plastic products.
Owner:HUNAN RIJING NEW MATERIAL TECH CO LTD

Diluent for blood cell detection

The invention discloses a diluent for blood cell detection, the diluent comprises a buffer solution, an osmotic pressure regulator, a preservative and a stabilizer, the concentration of the buffer solution is 5-100 mM, the osmotic pressure regulator accounts for 0.1-2% by mass, the preservative accounts for 0.01-0.05% by mass, the stabilizer accounts for 0.0001-0.05% by mass of the diluent, and the pH value of the diluent is 7.4-7.8; according to the invention, the buffer solution, the osmotic pressure regulator and the preservative in the range are compounded, so that the formed diluent has excellent chemical and physical properties; by adding the stabilizer, the diluent can keep stable for a long time, the influence of micron-sized bubbles on detection is effectively reduced, and the detection accuracy and precision are improved.
Owner:SHENZHEN DYMIND BIOTECH

Granite residual soil slope section structure optimization method

The invention discloses a granite residual soil slope section structure optimization method which is applied to the technical field of slope prevention and control. Comprising the steps that S1, geological drilling is conducted on a slope to be excavated, hydrogeological conditions are investigated to obtain relevant data of the slope, and the relevant data comprise stratum lithology, a slope body structure, an underground water level and a rainfall condition; s2, measuring physical and mechanical properties of stratum lithology according to the obtained side slope geological drilling core sample; s3, according to the height of the side slope, the stratum lithology, the land use red line and the surrounding environment, design parameters of the side slope stages, the slope ratio of each stage of the side slope, the height of each stage of the side slope and the platform width of the side slope to be excavated under different working conditions are designed; s4, obtaining slope stability coefficients corresponding to different working conditions based on S2 and S3, and obtaining an optimal section structure design working condition; s5, performing protection and retaining design on the slope to be excavated according to the principles of technology feasibility, economy, reasonability and ecological environmental protection on the basis of the step S4, obtaining a slope stability coefficient, and obtaining a protected slope section structure; and S6, on the basis of the S5, in combination with hydrogeology and meteorology, drainage design of the slope to be excavated is carried out, and finally an optimized slope section structure is obtained. According to the method, the long-term stability of the slope can be improved, better environmental adaptability and ecological friendliness are provided, engineering protection measures are reduced, and the construction and maintenance cost is reduced.
Owner:CHINA FIRST HIGHWAY ENGINEERING CO LTD +2

Matrix type plane temperature field monitoring system and method based on temperature-sensitive diodes

The invention discloses a matrix type temperature detection system and method based on temperature-sensitive diodes, the problems of complex wiring and large temperature drift of a traditional multi-node temperature measurement system are solved through M * N matrix layout, row and column time-sharing gating and constant current driving technologies, the system adopts an independent column constant current source to ensure the measurement consistency, and a high-precision ADC and a dynamic calibration algorithm are combined, so that the measurement accuracy is improved. And the precision of + / -0.2 DEG C is realized within the range of 50-150 DEG C. The method is particularly suitable for high-density temperature measurement scenes such as battery thermal management, electronic equipment overheating monitoring and the like.
Owner:SHANXI ZHITEXI NEW ENERGY TECHNOLOGY CO LTD