19results about How to "Delay decay" patented technology

The invention relates to the technical field of vehicles, aims to solve the technical problem that some known sealing strips are poor in sealing reliability, and provides a sealing assembly, a side wall assembly and a vehicle. The sealing assembly comprises a sealing strip and a plurality of partition parts. The sealing strip defines a sealing cavity. The multiple separation parts are arranged in the sealing strip at intervals in the length direction of the sealing strip and divide the sealing cavity into multiple sealing sub-cavities. The sealing assembly has the beneficial effect that the sealing reliability of the sealing assembly is improved.

The invention discloses a preparation method of a composite current collector for a low-lithium ion battery capable of rapidly discharging at low temperature. The method comprises the following steps: step 1, preparing a porous polymer substrate; step 2, preparing a metal-based pre-impregnation liquid; and 3, preparing the porous composite metal current collector. The middle layer of the composite current collector prepared by the method is composed of the porous polymer, the two sides of the middle layer are plated with the aluminum metal layer or the copper layer and used for a positive electrode and a negative electrode respectively, the porous current collector replaces a traditional metal current collector and can absorb and store a certain amount of electrolyte, and therefore an ion source is provided on one side of the current collector, ion-electron balance is achieved, and the service life of the current collector is prolonged. And the effect of high discharge capacity of the battery under low-temperature large current is achieved. Compared with a conventional metal current collector, the porous composite current collector prepared by the invention is lighter in weight, is beneficial to light weight of a battery, realizes the battery with higher energy density, and can relieve attenuation caused by electrolyte dryness and prolong the service life of the battery due to the capability of storing the electrolyte.

This application provides a method and related equipment for detecting small target vehicles from a low-altitude perspective, belonging to the fields of computer vision and intelligent transportation technology. The method includes: acquiring low-altitude images and performing multi-level feature extraction, performing feature preservation operations during the extraction process to retain high-resolution detail information; adaptively enhancing the extracted features to improve target-related feature responses; constructing a high-resolution feature response path, fusing shallow high-resolution features with deep semantic features to form enhanced features; and performing target detection based on the enhanced features. This application also optimizes feature representation through feature compression and path pruning to reduce computational complexity. Through a collaborative design of feature information preservation and reconstruction during multi-scale propagation, this application achieves a simultaneous improvement in the performance and computational efficiency of small target vehicle detection in complex low-altitude scenarios.

The utility model provides a special-shaped vehicle lamp light guide assembly and a vehicle. The special-shaped vehicle lamp light guide assembly comprises a light guide plate and a light guide plate, internally assembling a mirror; the light guide plate is arranged opposite to the inner lens, and the light guide plate is provided with a low beam end and a high beam end; the light guide plate comprises a light guide plate body and at least one light mixing gain structure on the side, away from the inner lens, of the light guide plate body, and the light mixing gain structure is connected with the low beam end and the high beam end. In the direction from the near light end to the far light end, the bending state of the light mixing gain structure is matched with the shape of the light guide plate; and the light source is arranged at the near light end of the light guide plate. According to the LED atmosphere lamp, the problem that obvious brightness difference occurs due to the design when a large included angle exists between the incident light direction of the LED particles and the modeling trend of the atmosphere lamp is solved.

This invention proposes a multi-scale feature enhancement and training method and apparatus for underwater sonar small target detection. The method includes: constructing a backbone network for a target detection model, with the network outputting four layers of multi-scale features at different resolutions; implementing sub-pixel-based skip connections to fuse high-level features; implementing sub-pixel-based context enhancement to fuse features at all scales; implementing channel attention sharing guidance to optimize the generated feature pyramid; constructing an overall target detection model, loading a pre-trained model and a sonar image dataset, and starting training; weighting the multi-scale loss values, selecting the two scales with the highest variance reduction rate for enhancement, and increasing their weights; calculating the overall loss, backpropagating to update the model parameters, and obtaining the target detection model after training. This invention achieves good detection accuracy in underwater sonar small target detection tasks.

The invention discloses a high-static cellulose acetate-based electret air filtering material and a preparation method, and belongs to the field of air filtering material preparation, the method comprises the following steps: carrying out electrostatic spinning on a mixed solution of cellulose acetate and CuSO4 in a mass ratio of 1: (0.01-0.04) under the voltage of 18-22 kV to obtain a composite nanofiber membrane; and removing redundant solvent in the composite nanofiber membrane to obtain the high-static cellulose acetate-based electret air filtering material, so that the problem that the electrostatic enhancement effect of the cellulose acetate-based electret air filtering material is relatively weak is solved, the method is simple, the preparation cost is low, and the method is suitable for industrial production. The filtering efficiency and the service life of the cellulose acetate-based electret air filtering material are greatly improved and prolonged.

The invention discloses a sixteen-electrode biological impedance measuring circuit, which comprises sixteen electrode circuits, electrode ends of which are respectively in contact with different positions of a human body; the analog switch circuit is used for controlling different electrode circuits to be connected; the sine wave generation circuit is used for converting the square wave signal into a sine wave signal and sending the sine wave signal to the analog switch circuit; the impedance voltage acquisition circuit is used for acquiring data generated when different electrode circuits are connected; the main control circuit is used for sending square wave signals to the sine wave generation circuit, controlling the analog switch circuit to enable different electrode circuits to be connected, receiving data collected by the impedance voltage collection circuit for calculation processing, optimizing a measurement loop, reducing the signal attenuation problem and improving the accuracy and stability of test data. And meanwhile, the trunk impedance TR can be accurately, stably and directly tested, and the problem of data fluctuation caused by conversion of multiple groups of measurement paths is avoided.

This invention provides an antistatic fabric based on modified acrylic fiber and its preparation process, belonging to the field of textile fabric technology. The process includes the following steps: first, preparing modified acrylic fiber and organosilicon quaternary ammonium salt modified CNW; then, mixing and stirring the modified acrylic fiber, DMF, and organosilicon quaternary ammonium salt modified CNW to obtain a spinning solution; mixing anhydrous ethanol and organosilicon quaternary ammonium salt modified CNW, and ultrasonically treating to obtain a dispersion; in a conjugate electrospinning device, feeding the spinning solution and dispersion into two sets of needles respectively, and electrospinning the spinning solution to form nanofibers under the action of a high-voltage electric field; feeding cotton yarn into the electric field region, causing the nanofibers to spirally wind around the surface of the cotton yarn and form a coating shell; and electrostatically spraying the dispersion to deposit the organosilicon quaternary ammonium salt modified CNW onto the surface of the coating shell; collecting and winding to obtain a fiber core-spun yarn, and weaving the fiber core-spun yarn to obtain the antistatic fabric. This invention can improve the antistatic performance of the fabric while also possessing certain antibacterial properties.

This invention provides a wireless bladder volume monitoring system based on inductive coupling, comprising a passive LC sensor unit attached close to the bladder, an external reading coil integrated into clothing or a belt, and a portable impedance measurement unit located in a clothing pocket. This system utilizes the strong penetrating power of low-to-medium frequency scanning signals to wirelessly monitor the state of the bladder through electromagnetic coupling between the passive LC sensor unit and the external reading coil, effectively overcoming the influence of relative pose changes between the passive LC sensor unit and the external reading coil on the measurement results. This invention obtains the system resonant frequency of the passive LC resonant unit by continuously detecting the impedance at the input terminal of the external reading coil, thereby realizing a wearable, wireless, passive, real-time bladder volume monitoring system. It features a simple structure, high reliability, and portability, making it suitable for long-term monitoring scenarios.

The invention relates to the technical field of carbon dioxide adsorbents, in particular to an SBA-15 solid amine adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out vacuum drying activation on the SBA-15 carrier; s2, preparing a composite impregnation liquid: dissolving organic amine and PEG-200 in absolute ethyl alcohol together, and fully stirring to form a uniform and transparent solution; s3, adding an activated SBA-15 carrier into the composite impregnation liquid, and carrying out impregnation and aging treatment; and S4, carrying out gradient drying and curing on the impregnated and aged product to obtain the SBA-15 solid amine adsorbent. Polyethylene glycol (PEG) with a specific molecular weight is introduced as a functional additive to synergistically optimize an impregnation solvent and amine loading capacity, so that the dispersion state of amine is improved on the molecular level and the anchoring effect of the amine is enhanced, and the adsorption capacity, dynamics and stability are synergistically improved.

This invention relates to the field of warehousing management technology for pre-packaged rice, flour, and oil products, and particularly to a method and system for agricultural product sales forecasting and inventory management based on big data analysis. The method includes: a data collection step, where multimodal time-series quality characteristic data of agricultural products are collected in real time using a composite sensing array deployed in the storage unit; an analysis step, where the data is input into a physical information fusion neural network to output the theoretical aging cycle and dynamic quality decay curve of individual batches; a depreciation measurement step, where the book inventory is dynamically converted into standardized effective inventory equivalent based on the decay curve; a procurement decision step, where a procurement plan is generated; and an inventory decision step, where outbound instructions are generated based on the effective inventory equivalent and remaining aging cycle, and inventory parameters are adaptively adjusted. This invention solves the technical problems of discrepancies between book inventory and actual sellable inventory, distorted replenishment decisions, and high loss rates caused by factors such as aging, moisture absorption, and mold growth in agricultural products. It achieves synergistic optimization of procurement and inventory, significantly reducing losses and capital occupation.

The application provides a battery management system and a multi-battery-pack cooperative control method thereof, single-battery-pack comprehensive data is obtained by separately collecting voltage and current data, temperature data and health state data of each battery pack, so that the collection and management of the battery pack data are realized, and a data basis is provided for the management and operation among the battery packs; based on the charging and discharging demand and the single-battery-pack comprehensive data, a globally optimal charging and discharging power distribution ratio is determined, the problem of unbalanced charging and discharging is solved, the charging efficiency and the available capacity of the battery are improved; based on the temperature data and the position distribution of all the battery packs, a joint thermal management strategy of adjacent battery packs is determined; by establishing the joint thermal management strategy, local overheating or overcooling is avoided, the battery attenuation is delayed, and the battery life is prolonged.

This invention relates to a selenium-containing compound vitamin chewable tablet and its preparation method, comprising the following raw materials in parts by weight: 10-16 parts selenium-enriched yeast, 25-35 parts L-ascorbic acid, 0.5-1 part vitamin K, 10-20 parts sorbitol, 1-3 parts DL-α-tocopherol acetate, 3-8 parts sodium octenyl succinate starch, 1-5 parts acetylated distarch adipate, 0.7-1.2 parts magnesium stearate, 0.3-0.5 parts potassium citrate, 0.04-0.07 parts steviol glycosides, and 5-10 parts modified silica. This invention improves the crispness and palatability of the chewable tablet by adding acetylated distarch adipate and sodium octenyl succinate starch; the addition of modified silica effectively reduces vitamin attenuation and improves the stability of the components.

The present application relates to a steel for automobile outer panel and a preparation method thereof, belonging to the technical field of steel preparation, the method comprising: rolling and annealing a cast ingot to obtain a steel strip; leveling the steel strip; electroplating the leveled steel strip to obtain the steel for automobile outer panel; wherein the electroplating adopts gravity electroplating, the pH value of the electroplating satisfies the set pH value, and the temperature of the electroplating solution satisfies the set temperature; by adopting gravity electroplating and controlling the pH value and the electroplating temperature of the electroplating solution, the roughness attenuation caused by the electroplating process is effectively reduced, and the steel is prepared by the method, so that the roughness Ra of the electroplating process can be attenuated ≤0.1μm, which is about 0.2-0.4μm compared with the current process roughness Ra attenuation, the attenuation value is reduced by more than half, and the attenuation of the peak count RPc is ≤10 / cm 2 , compared with the current process peak count RPc attenuation of 20-30 / cm 2 , the attenuation value is also reduced by more than half.

The invention provides a fuel cell heavy truck energy management method and system considering energy-saving driving. The method comprises the steps that an energy-saving driving index is determined according to driving state parameters obtained in real time; based on the energy-saving driving index, the front road information, the driving motor power and the driving state parameters, utilizing a space time sequence fused graph neural network prediction model to predict an instantaneous vehicle power demand; constructing a multi-objective optimization model and solving the model to obtain the target output power of the fuel cell stack and the target charging and discharging power of the energy storage device; issuing a power instruction to the fuel cell stack and the energy storage device according to the target output power and the target charging and discharging power, and triggering an energy storage compensation mode when the deviation between the actual driving power and the predicted power demand exceeds a preset condition; and the weight of the model is updated based on the deviation and the change of the energy-saving driving index, and energy-saving driving information is fed back to the driver. In this way, the driver is guided to optimize operation so as to further excavate the energy-saving potential, and the energy consumption economy and the driving range of the whole vehicle are improved.

The invention provides a three-dimensional model classification method based on point cloud position coding and multi-modal feature fusion. An existing three-dimensional model classification method has the problem of insufficient concern on the relation between points. In order to solve the problem, the invention provides a point cloud classification model which is combined with the relative position coding of the point cloud, the DRCNN (Dual-Ring Convolutional Neural Network) and the MVCNN (Multi-View Convolutional Neural Network). The invention further provides a method for classifying the point cloud according to the relative position coding of the point cloud, the DRCNN (Dual-Ring Convolutional Neural Network) and the MVCNN (Multi-View Convolutional Neural Network). According to the method, firstly, local neighborhood feature changes are sensed through the relative position codes of the point cloud, and then the DRCNN is input to obtain the global features of the point cloud. Then, multi-view features are extracted through the MVCNN to supplement point cloud representation; the method has the advantages that the correlation between the point cloud and multiple views is explored more effectively, multi-modal features with higher discrimination are generated, and the performance of three-dimensional model classification is improved through combination of the point cloud and the multiple views.

The invention relates to a satellite in-orbit propellant consumption optimization method, which is suitable for a satellite in a long-term operation mode, and comprises the following steps: S1, determining a satellite orbit condition, and calculating an earth shadow duration T actually experienced by the satellite; s2, determining a satellite load working condition, and analyzing and determining the maximum earth orientation duration T'meeting an energy balance requirement; s3, adjusting a shadow inlet point and a shadow outlet point based on the earth shadow duration T and the maximum earth orientation duration T '; s4, adjusting the image entering point and the image exiting point according to a preset step length n based on the performance requirement and the thermal control balance requirement of the storage battery, and repeatedly executing the step S3 to obtain the optimized image entering point and image exiting point; and step S5, completing satellite in-orbit attitude adjustment based on the optimized image entering point and image exiting point. According to the invention, the problem of propellant shortage of the satellite in various scenes such as long-year solar activity and late service life of the satellite is solved, and the attenuation of the satellite orbit can be delayed, so that the fuel consumption is reduced.

The invention discloses an energy recovery voltage protection method for an electro-tricycle, belongs to the technical field of crossing of electric control and battery management of electro-tricycles, and aims to remarkably enhance driving safety and stability, avoid sudden interruption risks, abandon a hard overvoltage protection mode depending on a fixed threshold value in a traditional scheme and improve the safety of the electro-tricycle. Constructing a progressive power regulation mechanism, calculating an error between an actual voltage and a target voltage to obtain a proportional gain and an integral gain when a communication-free battery voltage is between a power limiting point and an overvoltage point, further determining a current value for maintaining the target voltage, and smoothly limiting the generated power; according to the technical scheme, vehicle running interruption caused by direct cut-off of MCU output is avoided, running safety under key working conditions such as abrupt slope slow descent and braking is guaranteed, protection for cutting off MCU output is triggered only when the voltage exceeds an overvoltage point, battery overcharge is completely eradicated, sudden rise of bus voltage of the whole vehicle is prevented, battery attenuation is effectively delayed, and electrical elements such as vehicle-mounted electric appliances are protected against damage.

The utility model discloses a multifunctional USB (Universal Serial Bus) Type-C interface converter, which comprises a PD3.0 processor, the first USB Type-C interface is connected with a display, and the second USB Type-C interface is connected with a PD3.0 power supply; the PD3.0 processor converts an HDMI signal input by the HDMI interface into a DP signal matched with the first USB Type-C interface through a built-in HDMI to DP signal conversion processor; according to the utility model, the single Type-C interface can be used for converting traditional USB2 signal, HDMI signal and Type-C PD charging into a single Type-C interface, the single Type-C interface can support video and USB2 data transmission and PD charging functions at the same time, 20V charging can be carried out on a computer according to the specification of PD3.0, all original functions can be retained, the structure is simple and compact, the circuit of the product is most simplified, and the attenuation degree of signal transmission is reduced to the minimum.