33results about How to "Improve impact" patented technology

The invention provides a surface roughness quantification method with a hidden surface and a readable storage medium. The method comprises the following steps: acquiring an initial binary image; wherein the initial binary image comprises a surface profile curve with a hidden surface; fitting according to the surface profile curve to obtain a theoretical datum line; obtaining a reference binary image and an actual binary image corresponding to the reference binary image according to the theoretical reference line and the surface profile curve; the theoretical information entropy is obtained through calculation according to the reference binary image, the actual information entropy is obtained according to the actual binary image, the relative information entropy of the actual information entropy relative to the theoretical information entropy is obtained with the theoretical information entropy as the reference, and the relative information entropy is used for representing the surface roughness with the hidden surface. According to the method, the surface roughness of the hidden surface is quantified through the relative information entropy, and the surface roughness of different parts can be quantitatively evaluated by comparing the relative information entropy of the different parts.

This utility model discloses a high-voltage DC relay with a dual-magnetic steel structure, comprising: a housing, two sets of stationary contacts arranged inside the housing with their tops extending to the outside of the housing, an inner support cover inside the housing, an outer iron core inside the inner support cover, a shaft body at the center of the outer iron core, a moving contact at the upper end of the shaft body, and a bracket at the lower part of the moving contact. This utility model uses a dual-magnetic steel structure made of ferrite and neodymium iron boron materials, which features high temperature resistance and strong magnetism. The temperature generated during relay operation has a relatively small impact on the magnets, avoiding the situation where the product's electrical life is shortened due to excessively high operating temperature. Furthermore, the structural changes of this new product broaden its applications, and the improved temperature resistance of the magnets enhances the stability of the relay during operation.

The utility model provides a kind of wastewater treatment system of reinforced AOA-MBBR process stable operation, including secondary sedimentation tank, the periphery of secondary sedimentation tank is sequentially provided with anaerobic tank, first MBBR aerobic tank, second MBBR aerobic tank, first anoxic tank, second anoxic tank, filter tank;First and second MBBR aerobic tank are equipped with several combined suspended fillers, the outlet of two MBBR aerobic tanks is installed with cylindrical screen, and float ball liquid level meter, aerator are installed in the pool, online dissolved oxygen instrument and ammonia nitrogen on-line monitor are installed in second MBBR aerobic tank, float ball liquid level meter, online dissolved oxygen instrument and ammonia nitrogen on-line monitor are respectively covered with a protective cover outside.AOA-MBBR process is formed by coupling MBBR process and AOA process, wastewater is treated by anaerobic, aerobic, anoxic alternation state, improves total nitrogen and total phosphorus removal rate biological treatment, maximally utilizes raw water organic matter and internal carbon source to achieve the purpose of strengthening biological denitrification and phosphorus removal.

The invention discloses an advanced support device of an intelligent mining loader, which belongs to the technical field of mining equipment and comprises a chassis assembly, a loader shell is arranged at the top of the chassis assembly, an electric telescopic rod is arranged at the top of the loader shell, and support fixing equipment is arranged at the top of the electric telescopic rod. A support top plate is arranged at the top of the support fixing equipment; a sliding groove is formed in the supporting top plate, a movable supporting auxiliary top plate is movably connected into the sliding groove, and first racks are fixedly connected to the two sides of the movable supporting auxiliary top plate. Therefore, the upper portion of the driving assembly can be covered by the movable supporting auxiliary top plate, personnel injury and equipment damage caused by falling of broken stones at the top of a mine hole when the excavating assembly works are avoided, and the equipment is safer to use.

This invention discloses a method for optimizing the design of complex equipment based on a hybrid adaptive sampling surrogate model. This method divides the design space into several Voronoi polygons controlled by sample points. Three indices—leave-one-out error, local nonlinearity, and polygon region size—are used to evaluate the importance of each sample point region. An entropy-weighted distance method is used to select the most suitable sensitive region for adding points. A learning function based on error estimation is then combined to determine new sampling points. This iterative update constructs a high-precision surrogate model, establishing a mapping relationship between design parameters and optimization objectives, thereby solving the design optimization problem. This invention innovatively proposes a multi-index adaptive weight allocation method to select sensitive sample regions and proposes a novel learning function to determine the location of added points. This method can construct a high-precision surrogate model using fewer sample points and can be used for the optimization design of complex equipment, including but not limited to tunnel boring machines.

This invention belongs to the fields of medical image processing and deep learning technology. It discloses a pathological image classification method and system combining stable learning and hybrid enhancement. The method involves acquiring a pathological image dataset, dividing it into a training set, a validation set, a test set, and an external validation set, and preprocessing the dataset. A deep learning network combining stable learning and hybrid enhancement is constructed and trained using the training set. The optimal deep learning network model is obtained using the validation set. The test set and the external validation set are input into the optimal deep learning network model to output the pathological image classification results. This invention utilizes a well-fitting pathological image classification model to effectively improve the overfitting problem and weak recognition ability of traditional models for domain-biased data, enhancing the recognition accuracy of independent and identically distributed data, improving the robustness and generalization ability of the pathological image classification model, and increasing the diagnostic accuracy of pathological images.

The utility model provides an IGBT driving circuit based on a push-pull structure, and relates to the technical field of power electronic device driving, and the IGBT driving circuit comprises an optocoupler isolation module which is used for receiving a control signal and providing electrical isolation output; the push-pull driving module comprises an NPN type triode Q1 and a PNP type triode Q2 which are complementary and symmetrical; the push-pull driving module is configured as follows: when the optocoupler is conducted, Q1 is saturated and conducted, Q2 is cut off, and a driving current charges an IGBT grid electrode through R2; when the optocoupler is turned off, the Q2 is saturated and turned on, the Q1 is turned off, and the driving current flows through the R3 to discharge the grid electrode of the IGBT. Bidirectional driving current is provided through a push-pull structure, the charge charging and discharging speed of the IGBT grid electrode is increased, the switching loss is reduced, bidirectional driving current is provided through a switch-on resistor R2 and a switch-off resistor R3, the resistance value of the switch-on resistor R2 is selected to be small, the purpose of reducing switch-on loss Eon is achieved, the resistance value of the switch-off resistor R3 is selected to be large, and the purpose of reducing switch-off Vce is achieved.

This utility model relates to the technical field of electronic component testing equipment, specifically a Kelvin testing device. It includes a high-temperature resistant insulating housing, an adjustment bracket, a high-temperature resistant insulating cover, a push-button switch, and an inert gas inlet. The adjustment bracket is installed inside the high-temperature resistant insulating housing, and the component under test (DUT) is placed on the adjustment bracket. The position of the adjustment bracket is adjustable to ensure that the DUT is aligned with the test point. The high-temperature resistant insulating cover is hinged to the high-temperature resistant insulating housing, and the push-button switch is installed on the high-temperature resistant insulating housing, allowing the cover to be opened and closed by pressing the switch. The inert gas inlet is fixed to the high-temperature resistant insulating housing and connected to an inert gas source pipeline. It provides a stable testing environment, adapts to DUTs of different sizes, is high-temperature resistant and insulating, and protects the safety of the tested component.

This application relates to the field of engine intake system technology, and provides a sensor assembly and a vehicle. The sensor assembly includes a mounting bracket suitable for mounting a pressure detector. The mounting bracket includes a bracket body and a snap-fit ​​structure. The bracket body is provided with an intake air passage and a pressure stabilizing chamber communicating with the intake air passage and into which the detection head of the pressure detector extends. The snap-fit ​​structure is used to snap the pressure detector onto the mounting bracket. By providing an intake air passage and a pressure stabilizing chamber on the bracket body of the mounting bracket, the airflow entering through the intake air passage enters the pressure stabilizing chamber, which stabilizes the air pressure, reducing the impact of airflow fluctuations on the detection results, improving the accuracy of the detection results, and reducing the impact of airflow fluctuations on the detection head, thereby protecting the detection head. The snap-fit ​​structure allows the pressure detector to be mounted on the mounting bracket by snap-fit, which is convenient and quick, and reduces damage to the pressure detector compared to bolt fixing.

This invention relates to the field of civil defense shelter design. It discloses a civil defense basement with a self-ignition isolation structure for new energy vehicles, aiming to solve the problem of easy fire spread when new energy vehicles spontaneously combust in civil defense basements. It includes an inner frame, a first linear drive mechanism, a second linear drive mechanism, a telescopic isolation canopy, and a flame sensor. The first linear drive mechanism is located in the inner frame, and the second linear drive mechanism is located in the movable part of the first linear drive mechanism. The telescopic isolation canopy is deployed by the second linear drive mechanism. The flame sensor is located in the inner frame and is signal-connected to the two linear drive mechanisms. It can identify the ignition point and trigger the drive mechanisms, causing the telescopic isolation canopy to move to the ignition point and deploy. This structure can accurately isolate spontaneously combusting vehicles, reduce the fire spread range, improve the impact of fire on surrounding vehicles and the basement structure, and enhance the safety of parking new energy vehicles in civil defense basements.

The invention relates to the technical field of online car-hailing supervision, in particular to an online car-hailing supervision method and system. Comprising the steps of collecting data and performing data preprocessing to obtain an initial data set; inputting the initial data set into an urban online car-hailing saturation judgment model; outputting a judgment result through a data input layer, a data prediction layer, a data training layer and a judgment output layer in sequence; the judgment result is used for representing whether the online car-hailing number of the city is saturated or not; the data prediction layer predicts the initial data set through an RVM prediction model and an LSTM prediction model to obtain a prediction data set; the data training layer comprises a trained BP neural network; and the BP neural network carries out training on the prediction data set and outputs a training result. The invention provides an urban online car-hailing saturation judgment model which can perform prediction according to historical data of a city and judge whether the number of urban online car-hailing cars is saturated or not.

This invention discloses a method, apparatus, and device for evaluating the answer quality of a large language model, comprising: acquiring data to be evaluated; extracting the input question, standard answer, and model answer generated by the large language model to be evaluated for the input question; vectorizing the standard answer and model answer using a vector model to obtain standard sentence vectors and model sentence vectors; identifying semantic units in the standard answer and model answer to obtain a set of standard units and a set of model units; calculating the importance weight of each semantic unit in the set of standard units and the set of model units based on information entropy theory; performing semantic similarity matching between the semantic units in the set of standard units and the semantic units in the set of model units; determining the matched units covered in the set of standard units based on the matching results; and calculating multi-dimensional evaluation indicators based on the standard sentence vector, model sentence vector, importance weight, and matched units, and performing weighted fusion to obtain a comprehensive score.

The present application relates to a kind of small DMS optical lens, and the optical system of lens is sequentially arranged by first lens, second lens, third lens and fourth lens from left to right along the light path of light incidence, first lens is meniscus positive lens, second lens is meniscus positive lens, third lens is meniscus positive lens, and fourth lens is meniscus negative lens, first lens is glass aspheric lens, second lens, third lens and fourth lens are plastic aspheric lens.The present application adopts four optical lenses, and the optical system is formed by one glass aspheric lens and three plastic aspheric lenses, while meeting the imaging performance requirements of lens, the total length of lens and the radial dimension of each lens are reduced, to achieve the miniaturization of lens group;In addition, a glass aspheric lens is arranged in the first to fourth lens of lens, which can further improve the overall image quality of lens, control temperature drift and improve the influence of high temperature or low temperature on the image quality of lens.

The present disclosure provides a computing power leasing method, device, equipment, medium and data processing system, relating to the technical field of data processing. The method comprises: a central scheduling system receiving a computing power leasing request from an edge node, the computing power leasing request comprising an address of the edge node, leased computing power resource information, leasing time information and a leasing cost threshold; calculating a leasing cost corresponding to each node according to a preset network topology map, the address of the edge node and the leased computing power resource information; determining a plurality of alternative nodes based on the leasing cost and the leasing cost threshold; calculating a similarity value of the alternative nodes using data within a preset time and the edge node demand data; and determining a target leasing node from the alternative nodes according to the leasing cost and the similarity value of each alternative node. According to the embodiment of the present disclosure, the problem of tight computing power of the edge node can be alleviated.

This application relates to a circuit, method, and radar for detecting ambient light. The circuit for detecting ambient light includes: a photosensitive element for converting a received light signal into a current signal; an electrical signal conditioning circuit coupled to the photosensitive element for converting the current signal into a voltage signal; a detection processing unit coupled to the electrical signal conditioning circuit for converting the voltage signal into a digital signal based on a voltage threshold; and a digital processing unit coupled to the detection processing unit for processing the digital signal to obtain ambient light information. This application can detect ambient light, improve the anti-sunlight noise capability of lidar, improve the accuracy of lidar detection results, and thus enhance the personal and property safety of users.

The application discloses a rear floor assembly and a vehicle. The rear floor assembly comprises a general floor having a first surface and a second surface arranged oppositely, a floor framework connected with the first surface, the floor framework and the first surface cooperating to form two first energy absorption cavities arranged at intervals in a first direction, a first reinforcing member connected with the second surface and cooperating with the second surface to form a second energy absorption cavity between the two first energy absorption cavities in the first direction, and a second reinforcing member connected with the second surface and cooperating with the second surface to form a third energy absorption cavity, one of the two first energy absorption cavities being located between the second energy absorption cavity and the third energy absorption cavity in the first direction. Thus, a plurality of energy absorption cavities arranged at intervals in the first direction and alternately arranged on the first surface and the second surface on both sides of the general floor are formed, so that the structural strength of the rear floor assembly can be effectively improved, and the impact performance of the rear floor assembly can be improved.

The invention provides an engine thermal management control method, device and system, a medium and electronic equipment, and the method comprises the steps: obtaining driving basic information at the current moment, including first vehicle state information, first engine state information, driving behavior information of a driver and map data information around a vehicle; processing the driving basic information at the current moment based on a driver behavior prediction network model to obtain driving behavior information at each future moment within a preset future duration from the current moment; acquiring second vehicle state information at the current moment as an initial state of the vehicle model, and acquiring second engine state information at the current moment as an initial state of the engine model; and after the driving behavior information of each future moment in the preset future duration is input into the vehicle model and the engine model, the minimum fuel quantity in the preset future duration is used as an optimization target, and the engine thermal management control quantity in the next control period is calculated through a model prediction control algorithm.

The utility model relates to test device technical field, concretely relates to based on host computer compressed air output and fast release test data collection device, including host computer, variable frequency air compressor, fixed frequency air compressor, electric valve and no.

The utility model discloses a kind of battery packs, including the box and box cover connected together, the box includes accommodating cavity, the accommodating cavity includes the battery compartment and electrical compartment of interval arrangement, the box cover includes battery compartment sealing area and electrical compartment sealing area, the battery compartment sealing area cover is located at the top of the battery compartment, the electrical compartment sealing area cover is located at the top of the electrical compartment;The box cover includes the cover main body of nonmetal material, the electrical conductivity of the cover main body is 10 ‑7 ~10 ‑14 S / m, the cover main body is at least provided with electromagnetic shielding layer in the electrical compartment sealing area, the electrical conductivity of the electromagnetic shielding layer is 10 6 ~10 8 S / m.The battery pack of the utility model, the weight of box cover is reduced, the insulation of box cover is guaranteed, so that box cover has electromagnetic shielding function, guarantee the normal operation of battery management system in electrical compartment.The utility model further discloses a kind of electric vehicles.

The application discloses a Helmholtz type low broadband aerodynamic noise reduction super surface and a design method thereof, and relates to the technical field of aerodynamic noise suppression. The super surface comprises a plurality of arrayed Helmholtz type low broadband aerodynamic noise reduction super surface units; the super surface unit comprises a plurality of parallelly arranged Helmholtz low frequency aerodynamic noise reduction structures. The Helmholtz low frequency aerodynamic noise reduction structure comprises a hollow square cavity; the inside of the square cavity is divided into a first cavity and a second cavity by a partition plate, a first cylindrical hole structure is arranged on the partition plate and extends to the inside of the first cavity; a plurality of second cylindrical hole structures are arranged on the upper wall of the square cavity and extend to the outside of the square cavity; the first cylindrical hole structure, the second cylindrical hole structure and the second cavity constitute a neck structure of the Helmholtz low frequency aerodynamic noise reduction structure. The application can efficiently control low frequency aerodynamic noise.

The utility model belongs to mask plate transfer technical field, specifically disclose a kind of moisture-proof transfer box, including box and box cover, the box cover can be covered on the box, the slot body is formed in the storage groove with the inside of the box in the box inside and be located at its periphery, the slot body between each form the placing space for placing product, the slot body side facing the placing space is all set up with multiple holes;The slot cover that the slot body sequentially corresponds is all set up with the inside of the box cover and be located at its periphery, after the box cover and the box are mutually buckled, the slot cover can be covered on the slot body and close the slot body.The utility model can reduce the influence of mask plate in the process of transfer by environmental temperature and humidity, improve the phenomenon that mask plate surface mildews atomization and long white mold spot.

The application discloses an AIS beacon-based navigation information publishing method and system, relates to the technical field of navigation aid, and comprises the following steps: acquiring multi-source beacon data, and obtaining multi-source beacon state data through data collection channel convergence mapping; utilizing a quick screening mechanism to screen and analyze, obtaining a beacon state data set to be published, and performing priority sorting to obtain priority beacon data information; based on publishing adaptation processing, obtaining a standardized publishing data package, and performing differential matching to obtain corresponding publishing instructions; utilizing an AIS communication link to publish the standardized publishing data package to a corresponding target navigation area; constructing a publishing state monitoring system, dynamically monitoring the execution process of the publishing instructions by utilizing the publishing state monitoring system, and optimizing the publishing parameters by combining the monitoring results and feedback information, to obtain optimized publishing control parameters. The application improves the accuracy and efficiency of beacon navigation information publishing.

This utility model relates to the field of subway engineering technology, specifically disclosing a built-in smoke exhaust fan room based on a subway entrance / exit pipe jacking shaft. It includes an entrance / exit pipe jacking channel, a launching shaft, a receiving shaft, and a built-in smoke exhaust fan room. The two ends of the entrance / exit pipe jacking channel are connected to the launching shaft and the receiving shaft, respectively. An underground smoke exhaust fan room is formed inside the launching shaft. The smoke exhaust fan room includes a smoke exhaust fan, a mezzanine slab, and a launching shaft top slab. The mezzanine slab has a first smoke exhaust hole and a table-shaped frame structural column. A fan foundation and a second smoke exhaust hole are provided on the table-shaped frame structural plate supported by the table-shaped frame structural column to support the smoke exhaust fan. The launching shaft top slab has a third smoke exhaust hole and a ground smoke exhaust hole well. Smoke exhaust ducts pass through each smoke exhaust hole, connecting the ground, the smoke exhaust fan, and the entrance / exit channel. The smoke exhaust fan room is centrally located relative to the entrance / exit channel. This utility model uses pipe jacking for underground excavation to avoid open-cut excavation, makes full use of abandoned shafts, avoids resource waste, improves smoke exhaust efficiency, saves investment, and optimizes the urban landscape.

This invention discloses a novel water-reducing agent, its preparation method, and its application. The preparation method includes: pouring an unsaturated polyether macromonomer solution into a reaction vessel; adding an oxidant and stirring at 50℃~60℃; simultaneously adding an unsaturated carboxylic acid small monomer solution and a mixed solution of a reducing agent and a chain transfer agent dropwise into the reaction vessel and stirring; maintaining the temperature and then cooling to room temperature to obtain a mother liquor; adding a lignin solution to the mother liquor to adjust the pH of the material in the reaction vessel to 11~12 to obtain the novel water-reducing agent. The novel water-reducing agent of this invention can improve the effect of residual flocculants in manufactured sand on concrete performance.

The application discloses a kind of sensing circuit and hydraulic switch, design sensor technical field, wherein sensing circuit includes light-emitting component, first voltage divider component, photosensitive component and voltage regulating unit, light-emitting component is used to emit light source;The first end of photosensitive component is used to access power supply, the second end of photosensitive component is grounded by first voltage divider component, photosensitive component is used to make the first end and the second end of photosensitive component conductive when sensing the light source emitted by light-emitting component;Voltage regulating unit at least includes a transistor and an output, the control end of transistor is the input of voltage regulating unit, and the output is connected with one end of transistor, the application is by setting voltage regulating unit, so that the final output voltage will only output two kinds of voltage, eliminate the influence of intermediate state voltage, facilitate subsequent to whether there is water flow through in pipeline Precision judgment is realized, and then the precision of the sensing circuit of the application is improved.

The application provides an explosion load simulation device based on electromagnetic pulse, belonging to the field of explosion test, which comprises an electromagnetic pulse unit and an explosion simulation unit, wherein: the electromagnetic pulse unit adopts a closed structure, and an electrically conductive coil for connecting with a pulse capacitor is arranged in the electromagnetic pulse unit to generate a magnetic field in the explosion simulation unit; the explosion simulation unit is connected with the bottom plate of the electromagnetic pulse unit, and an inside of the explosion simulation unit is used for placing a metal test piece to be tested, and the metal test piece to be tested generates eddy current and forms downward repulsive force under the action of the magnetic field. The application uses current as an energy source, generates a magnetic field by using an electrically conductive coil, and further causes the metal test piece to be tested to generate eddy current by electromagnetic induction, so that the metal test piece to be tested deforms or even tears in a very short time, and the purpose of simulating explosion load is achieved. Compared with a device using explosives as a load source, the application has the advantages of high safety, strong controllability, simple structure, short manufacturing period, low cost and the like.

The utility model discloses a kind of oil cylinders with protective structure, including oil cylinder main body, mobile piston, piston rod and cylinder cover, the outer end fixed mounting of oil cylinder main body has protective sleeve, the inner wall fixed mounting of oil cylinder main body has heat insulating layer;The lower positioning piece is fixedly installed on the upper end of the oil cylinder main body, the fastening ring is threadedly connected with the outer curved surface of the lower end of the lower positioning ring, the flexible bellow is extruded and adhered to the lower end of the fastening ring, the upper positioning piece is fixedly installed on the outer curved surface of the upper end of the piston rod, the positioning column is fixedly installed on the upper end of the upper positioning piece, the clamping piece is movably connected with the outer curved surface of the positioning column, the limiting ring is fixedly installed on the upper end of the positioning column, the supporting spring is fixedly installed on the lower end of the limiting ring, the flexible bellow upper end inside extrusion is adhered between the clamping piece and the upper positioning piece.The utility model greatly improves the protection performance of oil cylinder main body, prolongs the service life of oil cylinder main body.

The utility model relates to the technical field of protective shells, and discloses a middle frame and a mobile phone cover, which comprise a frame body, the middle part of the frame body is provided with an opening to form an annular hollow outline structure, the inner wall of the opening is set as a flat area, and the edges of the two opposite ends of the opening extend inwards to respectively form a first covered edge and a second covered edge for supporting and positioning. Through the opening and the flat area arranged on the inner wall of the opening, the mobile phone main body is sleeved. The edges of the two opposite sides of the opening respectively extend inwards to form the first covered edge and the second covered edge, so that the periphery of the mobile phone is limited and supported, the mobile phone is prevented from shaking in the middle frame, the mobile phone is prevented from being damaged due to collision or movement, and reliable protection is provided for the mobile phone. The annular hollow outline structure is formed through the opening, so that the back of the mobile phone is not shielded on the basis of guaranteeing the protection performance, the heat dissipation performance is greatly improved, and the influence of heat accumulation on equipment operation is reduced.