24results about How to "Eliminate structure" patented technology

The invention discloses a high-precision position detection method for a permanent magnet motor system, and the method comprises the following steps: S1, building a harmonic counter electromotive force model of a permanent magnet motor, and analyzing the influence of the harmonic counter electromotive force on a position estimation error; s2, constructing an arcsine saturation function of which the boundary layer thickness is self-adjusted along with the error of the sliding mode surface as a switching function; s3, establishing a mathematical model of a sliding-mode observer based on an arcsine saturation function, and obtaining a parameter selection range by using a Lyapunov stability criterion; s4, carrying out Park conversion on the output value of the sliding-mode observer to obtain a direct current amount under a dq coordinate system; a first-order low-pass filter is used for filtering, fundamental wave counter electromotive force is reserved, and sine counter electromotive force is extracted from the fundamental wave counter electromotive force through Park inverse transformation; and S5, in combination with an orthogonal phase-locked loop, performing position estimation on the output sine counter electromotive force to obtain an estimated rotor position angle and an estimated rotor rotating speed. The precision and the dynamic performance of sensorless control of the permanent magnet motor can be improved.

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a preparation method and application of a lithium iron manganese phosphate positive electrode material. The preparation method of the lithium manganese iron phosphate positive electrode material comprises the following steps: mixing a lithium manganese iron phosphate material, an iron source, a phosphorus source, a lithium source, a dopant and a carbon source, sanding, carrying out spray drying to obtain a precursor, and carrying out first-stage sintering, cooling and second-stage sintering on the precursor to obtain the lithium manganese iron phosphate positive electrode material. The precursor is subjected to two-stage sintering, the first-stage sintering promotes diffusion of manganese and iron ions at high temperature, and in-situ solid solution of manganese and iron is achieved; after cooling, second-stage sintering is carried out in an environment lower than the first-stage sintering temperature, so that structural defects generated in the material in a high-temperature solid solution process are eliminated; the outer layer of the prepared lithium manganese iron phosphate material is rich in iron, so that the dissolution of manganese ions is effectively reduced, the conductivity of the material is also improved, and the positive electrode material has relatively excellent electrochemical performance and long cycle performance.

The utility model relates to a refrigerator door spraying-free end cover structure which comprises a main shell, an integrally-formed groove is formed in the main shell, a protective lining is detachably installed in the groove and comprises a U-shaped body and two side plates rotationally installed on the two sides of the U-shaped body respectively, and when the protective lining is installed in the groove, the two side plates are close to each other to be closed. And the two side plates are arranged on the U-shaped body and form finger grooves for fingers to enter together with the U-shaped body, and when the protective bushing is detached from the groove, the two side plates are unfolded outwards and are flush with the long part of the U-shaped body. According to the door body end cover structure, the door body end cover structure is divided into two main parts, namely the main shell and the protective bush, the protective bush is detachably mounted in the groove in the main shell, stains generated by hand contact are only attached to the surface of the protective bush, and the stains can be conveniently and comprehensively cleaned by regularly detaching the protective bush, so that the safety of the door body end cover structure is improved. The problem that a traditional finger groove is difficult to clean is effectively solved.

The application discloses a live material recommendation method and system based on big data analysis, relates to the technical field of streaming media and multimedia content retrieval, and comprises the following steps: S1, collecting live stream video data, performing space-time feature extraction through an improved TimeSformer model, and introducing a space-time Doppler frequency shift modulation mechanism to modulate original time attention weight; S2, outputting 3D scene features and corresponding camera projection parameters; S3, determining a 2D visual blind area; S4, calculating the initial spatial position of the material to be recommended; S5, outputting 3D superposition parameters; S6, generating 3D rendering materials; S7, outputting a live stream; and S8, analyzing the live stream, and performing real-time rendering and interactive display. The application overcomes the limitations of the traditional method, such as plane mapping violation, neglecting 3D space constraints and being driven by behavior data, and provides an efficient solution for live intelligent recommendation.

This invention discloses a big data-based EVA membrane product production management system and method, belonging to the field of industrial big data analysis and production management technology. It includes: acquiring multi-source heterogeneous production data from various stages of the EVA membrane product production process; performing data cleaning and standardization to obtain a standard production dataset; extracting key production features from the dataset and constructing a multi-dimensional feature vector space; using a density-based clustering-based anomaly detection algorithm to perform pattern recognition on the feature vector space, generating a set of abnormal production events; using an association rule mining algorithm to extract association rules between abnormal events and production parameters, obtaining a root cause parameter set; constructing a production parameter adjustment decision tree; and generating production optimization strategies based on the decision tree. This invention also provides a corresponding system that realizes automatic root cause analysis and parameter optimization feedback for EVA membrane product production anomalies.

A flat-belt type connecting mechanism, an electric energy transmission device and a motor vehicle. The flat-belt type connecting mechanism includes a male-end connecting mechanism (10) and a female-end connecting mechanism (20). The male-end connecting mechanism includes a busbar (11), a flat terminal (113), and a male-end housing (12) connected to the busbar and the flat terminal. The female-end connecting mechanism includes a double-busbar (21), a clamping terminal (213), and a female-end housing (22) connected to the double-busbar and the clamping terminal. The male-end connecting mechanism and the female-end connecting mechanism are electrically connected to each other through the clamping terminal and the flat terminal, and the male-end housing and the female-end housing are assembled and connected to each other, to form the flat-belt type connecting mechanism. The busbars are stacked at a proper interval to effectively reduce an electromagnetic interference to other parts after the busbars are electrified, thereby eliminating a shielding layer structure of a high-voltage charging harness to reduce the cost and weight.

The utility model relates to an oblate pipe piece head for temperature regulation, a radiating fin and a radiator, the oblate pipe piece head comprises a spiral hollow shell and a plug, and a connecting port is arranged on the side surface of the shell; the bottom surface of the shell is provided with at least two oblate interfaces; the long axis direction of the oblate connector is perpendicular to the opening face of the connecting port. The oblate interfaces in the short axis direction of the oblate interfaces are arranged at equal intervals from one end part of the shell to the other end part of the shell; the long axes of the adjacent oblate interfaces are parallel to each other; the oblate interfaces are matched with the oblate pipe interfaces at the two ends of the oblate pipe; the plug is matched with the connecting port; the connecting port is provided with a cylindrical extension shell; the extension shell protrudes outwards in the opening direction of the connecting opening. According to the oblate pipe piece head, the cooling fin and the radiator, optimized arrangement and cleaning can be conveniently carried out in a narrow and small indoor space, and the temperature rising efficiency of the whole indoor space is improved.

The invention discloses an anti-inclination spring support and a using method thereof. The lower end of a spring outer barrel is fixed to a lower end plate, a pressing plate is arranged in the spring outer barrel, a spring is installed between the pressing plate and the bottom of the spring outer barrel, a bearing column is arranged at the upper end of the pressing plate and is in threaded connection with the pressing plate, and the upper end of the bearing column is connected with a bearing plate; the anti-inclination auxiliary supporting columns are distributed in the 0 o'clock direction, the 3 o'clock direction, the 6 o'clock direction and the 9 o'clock direction of the spring outer cylinder body, metal expansion joints are connected in the anti-inclination auxiliary supporting columns, the maximum compensation amount of the expansion joints is the design displacement amount of the pipeline in the vertical direction at the position, and the tops of the anti-inclination auxiliary supporting columns are provided with auxiliary bearing plates. The area between the anti-inclination auxiliary supporting column and the spring bearing plate is increased, the stress borne by the end of the anti-inclination auxiliary supporting column is reduced, and the overall structural stability is improved.

The invention relates to the technical field of batteries, in particular to a battery pack bottom support. The battery pack bottom support is used for bearing a battery pack and comprises at least two trays and connecting pieces, a split gap is formed between any two adjacent trays, any tray comprises a frame body, a reinforcing part and a connecting part which are integrally formed, the frame body is used for being connected with a girder of a vehicle, the reinforcing part is arranged in the frame body, and the connecting pieces are arranged on the frame body. Part of the connecting part is arranged on the frame body, the other part of the connecting part is arranged on the reinforcing part, and the connecting parts are used for connecting the battery pack; and the connecting pieces are positioned in the split gaps, are connected with any two adjacent frame bodies, and are used for connecting the battery packs. According to the battery pack bottom support, the at least two split type sub-trays are obtained through integrated die casting, so that the battery pack bottom support can adapt to various vehicle girder specifications, and the mold opening cost is reduced while the structural consistency of the battery pack bottom support is improved.

This invention discloses a gas composition analysis method and system based on intelligent sensors, belonging to the field of intelligent sensing technology. The method includes the following steps: S1, outputting a preprocessed transient response sequence; S2, constructing a multi-dimensional spatiotemporal matrix; S3, by improving the MaxViT model, introducing a pedigree evolution mechanism based on biological evolution theory to drive feature topology construction, quantifying node evolution paths and branch differences, and combining a multi-scale attention mechanism to capture transient response details and long-range dependencies; S4, constructing a set of feature vectors to be processed; S5, outputting a high signal-to-noise ratio fused feature vector; S6, outputting the qualitative category label and initial concentration value of the target gas; S7, outputting the final gas composition analysis result. This invention overcomes the limitations of traditional methods, such as single feature extraction, difficulty in decomposing multiple groups, and neglect of environmental and aging interference, providing an efficient solution for intelligent gas sensing analysis.

The application discloses a kind of based on step space placeholder shaping composite gradient material preparation process, the whole process space placeholder constraint of ceramic material is as core, first through digital modeling completes the space placeholder partition of gradient component and boundary locking, then through finite element simulation analysis the thermal isostatic pressing deformation law under placeholder constraint, subsequently adopt two-step coaxial powder feeding additive manufacturing process, first through ceramic powder completes full-area space placeholder and high-melting-point metal skeleton preforming, then remove the ceramic powder filling low-melting-point metal of target area, finally complete thermal isostatic pressing densification under the whole process constraint of ceramic space placeholder;The application solves the industry pain points of different powder cross mixing, gradient interface blur and high-temperature rheological deformation in traditional process from the root through step space placeholder technology, without customization package, greatly improve the forming precision and batch consistency of gradient structure.

The application discloses low-moisture propylene carbonate-based lithium ion energy storage electrolyte and a preparation process thereof, and belongs to the technical field of electrolyte preparation, and is used for solving the technical problem that the cycle performance of lithium ion batteries needs to be further improved due to the incompatibility of propylene carbonate-based electrolyte with a graphite negative electrode and the side reactions caused by moisture in the system in the prior art, and specifically comprises the following components in parts by weight: 60-80 parts of propylene carbonate, 2-5 parts of alkenyl-terminated fluoropolyether, 10-15 parts of lithium salt, 3-6 parts of boron-containing amine ester flame-retardant water-removing agent and 1-5 parts of functional additive. The boron-containing amine ester flame-retardant water-removing agent is prepared, cooperates with the alkenyl-terminated fluoropolyether, removes trace moisture in the electrolyte, blocks the hydrolysis reaction of lithium hexafluorophosphate, avoids the generation of hydrofluoric acid, simultaneously optimizes the electrochemical compatibility of the electrolyte with the negative electrode, and significantly improves the cycle life and interface safety of the battery.

The utility model relates to the technical field of underground engineering waterproofing, and discloses a shield well permanent and temporary combination ring frame beam and side wall multi-stage grouting composite waterproof structure which comprises an underground diaphragm wall body, a permanent and temporary combination ring frame beam body and a side wall body. According to the shield well permanent and temporary combined ring frame beam and side wall multi-stage grouting composite waterproof structure, the PVC waterproof coiled material adopts the specification with the thickness larger than or equal to 1.5 mm, a three-stage continuous sealing layer is formed by the PVC waterproof coiled material, the polysulfide sealant and the water stop belt through the sweat soldering technology, the underground water permeation path is effectively blocked, the joint leakage rate is remarkably reduced, the galvanized grouting steel pipe is pre-buried in the DN specification, and therefore the construction efficiency is improved. The galvanized grouting steel pipe works cooperatively with the repeatable grouting pipe, through the multi-round grouting technology of single-liquid cement paste, full compaction of a cement paste filling layer is achieved, the leakage risk of structural joints and cavities is thoroughly eliminated, and the galvanized grouting steel pipe creatively has the dual functions of underground water guide and drainage in the construction period and permanent anti-seepage grouting. Precise regulation and control of the grouting process are achieved through a ball valve control system.

The application discloses a tendon post-processing method for a robot dexterous hand and application thereof and belongs to the technical field of tendons. 3 ‑10 4 times of dynamic loading-unloading cycles; step 2, the tendon to be processed is tensioned at 30% of the rated load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, is then warmed to room temperature at a rate of 5-8 DEG C / min, is again tensioned at the working load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, and is then warmed to room temperature at a rate of 5-8 DEG C / min. The application eliminates the tiny internal stress or structural relaxation existing in the tendon after twisting and improves the structural stability of the tendon. In addition, the application completely releases the internal stress of the tendon, reduces the overall stress level of the tendon and improves the fatigue performance of the tendon.

The invention relates to the technical field of thermal interface materials, in particular to a composite thermal interface material based on metal aerogel and a preparation method and application of the composite thermal interface material. The composite thermal interface material based on the metal aerogel prepared by the invention has excellent flexibility. Compared with a conventional polymer-based heat-conducting pad in the prior art, a three-dimensional heat-conducting network formed by the metal aerogel greatly improves the deformability of the composite thermal interface material, the composite thermal interface material can be adaptively attached to the surface of a complex structure, better processing conditions and process results are achieved, and the interface thermal resistance of the thermal interface composite material is reduced.

The invention discloses a multi-system data processing method and device, equipment, a medium and a program product, and relates to the technical field of data processing.The method comprises the steps that new system data before mapping and old system data before mapping are obtained; mapping the new system data before mapping and the old system data before mapping into specified field names in a unified manner to obtain new system data after mapping and old system data after mapping; performing logic maintenance processing on the mapped new system data and the mapped old system data to obtain target system data; wherein the logic maintenance processing at least comprises data filtering, data cleaning and data integration; and performing persistence processing on the target system data to enable the target system data to keep communication connection with the database, and transmitting the target system data to the database. According to the method and the device, the new system data and the old system data are uniformly mapped, and the mapped new system data and the mapped old system data have uniform specified field names, so that subsequent data processing is facilitated.

The invention provides a pretreatment method for improving a metal die casting screw column sand hole and a metal die casting. The metal die casting sand hole pretreatment method based on the stud friction forming device comprises the steps that the top of a stud of a metal die casting is sleeved with the profiling lantern ring; a rotary welding head of the friction welding machine is driven to extend into an inner ring of the profiling lantern ring; and when the rotary welding head of the friction welding machine abuts against the top of the screw column of the metal die casting, the rotary welding head of the friction welding machine is driven to rotate relative to the profiling lantern ring so as to rub and compact the top of the screw column of the metal die casting. According to the pretreatment method for improving the sand hole of the screw column of the metal die casting, heat is generated through friction between the rotary welding head of the friction welding machine and the top of the screw column of the metal die casting, so that the top of the screw column of the metal die casting is melted to form a compact structure; and sand holes in the top of the screw column of the metal die casting can be effectively eliminated.

The utility model relates to a visual controller with a PLC function, comprising a housing and a circuit board integrated in the housing, the circuit board is provided with a visual processing module, a PLC control module, a communication interface module and a power supply management module; the communication interface module comprises a visual interface unit, and the visual interface unit is connected with the signal end of the visual processing module and extends a plurality of signal interfaces. The visual processor and the PLC are integrated on the single circuit board and share the communication interface module and the power management module, so that a shell redundant structure and external wiring of discrete equipment are eliminated, the hardware size is reduced, and the material cost and the assembly complexity are remarkably reduced.

The application discloses a bearingless permanent magnet synchronous axial flow pump based on integrated winding and a control method thereof. The claw pole type stator comprises a plurality of claw pole units, each claw pole unit has a stator tooth extending in the axial direction and a claw head extending in the radial direction from the end of the stator tooth, and the inner surfaces of all the claw heads enclose a working air gap opposite to the outer surface of the rotor; the torque winding and the suspension force winding are wound on the stator tooth together, share the same axial winding space, and the electrical phase sequences of the two sets of windings are independent; the suspension force winding is configured to pass through two groups of currents with opposite phase sequences; the pose sensor is arranged in the radial gap between adjacent claw heads; by collecting the position sensor in real time, the magnetic pole state of each claw head is dynamically adjusted by controlling the currents of the torque winding and the suspension force winding, and the driving torque and the controllable radial suspension force are generated simultaneously. The application solves the problems of complex structure and insufficient control precision of the existing magnetic suspension pump, and has the characteristics of compact structure, high control precision and fast dynamic response.

The utility model discloses a battery module bottom plate convenient to maintain, including bottom plate body, gyro wheel subassembly, bottom plate body is equipped with cavity, gyro wheel subassembly sets up in the cavity, and the through hole of installation is equipped with on the side wall of cavity close to bottom plate outer side, and the coaxial mounting hole is equipped with on the other side wall of cavity opposite to this side wall, gyro wheel subassembly includes gyro wheel, bolt, clamp, gyro wheel is covered and is set on the bolt, and the one end of bolt is connected with the through hole of installation, and the other end is connected with the mounting hole, and the recess is equipped with on the outer circular surface of bolt near the through hole of installation one side along the radial direction, and the clamp is covered and is set on the recess, and the outer diameter of clamp is greater than the diameter of recess, and the one end of clamp is in contact with the groove wall of recess, and the other end is in contact with the cavity side wall of through hole of installation in gyro wheel rolling process and is limited, and the first waist type hole is equipped with in the bottom of cavity, and the outer circular surface of gyro wheel is projected to the first waist type hole.

The application relates to a beam-hung assembly type wall connecting piece structure and a construction method thereof, which comprises a bottom plate, vertical steel pipes and two vertical side plates, the vertical steel pipes and the two vertical side plates are fixedly arranged on the bottom plate, the two vertical side plates are arranged at intervals and a clamping beak is formed between the two vertical side plates; a sliding sleeve ring is sleeved on the vertical steel pipe, a horizontal hanging rod is fixed on the outer wall of the sliding sleeve ring, a locking bolt is installed on the sliding sleeve ring, and a clamping space is formed between the horizontal hanging rod and the clamping beak. The beam-hung assembly type wall connecting piece structure in the application omits multiple processes such as pre-burying, protecting, installing, cutting, tail removing and repairing of a traditional wall connecting piece on a structure beam, and only needs to complete the installation or removal process once, so that hidden troubles of structure leakage and steel bar corrosion in the later period are eliminated, installation and removal convenience is improved, construction progress can be accelerated, the construction period can be shortened, and the applicability is high.

The invention relates to the technical field of plastic processing of metal materials, and discloses a method for improving spinning formability of a solid-solution-state barrel section with inner ribs through pretreatment, which comprises the following steps: annealing a barrel section blank made of an aluminum alloy material, firstly placing the barrel section blank in a heat treatment furnace for heat preservation at 400-450 DEG C, and then carrying out water quenching and cooling to room temperature; the annealed barrel section blank is installed on a cylindrical core mold, and then thinning spinning is carried out; carrying out solution treatment on the thinned barrel section blank, firstly putting the thinned barrel section blank in a heat treatment furnace for heat preservation at 500-540 DEG C, and then carrying out water quenching and cooling to room temperature; and the barrel section blank obtained after solution treatment is installed on a cylindrical core mold with rib grooves, spinning forming is carried out, and the aluminum alloy barrel section with the inner ribs is obtained. According to the method, annealing-thinning pretreatment is adopted, the cracking risk in the solid solution state barrel section spinning forming process is effectively reduced, the aluminum alloy strip inner rib barrel section obtained through the method has the higher rib height wall thickness ratio, and the method is suitable for various aluminum alloy strip inner rib barrel sections in aerospace.

This application discloses a virtual staining method, apparatus, device, and medium for images, relating to the field of image processing technology. The method includes: inputting an image of tissue to be stained into a preset morphological instance detection model to locate morphological structural units of a preset category in the image, obtaining corresponding bounding box sets, and generating a target mask; inputting the image of tissue to be stained into a preset virtual staining generation model, performing staining transformation on the image of tissue to be stained through a global virtual staining path to generate a global staining result, and performing staining processing on the image regions where the morphological structural units in the image of tissue to be stained are located through instance virtual staining paths and according to the bounding box sets to generate instance staining results; performing geometric deformation correction processing on the instance staining results and outputting corrected instance staining results; and performing weighted summation and residual repair processing on the global staining results, corrected instance staining results, and target mask to generate a target virtual staining image. This achieves high-quality virtual staining.

A flat-belt type connecting mechanism, an electric energy transmission device and a motor vehicle. The flat-belt type connecting mechanism includes a male-end connecting mechanism (10) and a female-end connecting mechanism (20). The male-end connecting mechanism includes a busbar (11), a flat terminal (113), and a male-end housing (12) connected to the busbar and the flat terminal. The female-end connecting mechanism includes a double-busbar (21), a clamping terminal (213), and a female-end housing (22) connected to the double-busbar and the clamping terminal. The male-end connecting mechanism and the female-end connecting mechanism are electrically connected to each other through the clamping terminal and the flat terminal, and the male-end housing and the female-end housing are assembled and connected to each other, to form the flat-belt type connecting mechanism. The busbars are stacked at a proper interval to effectively reduce an electromagnetic interference to other parts after the busbars are electrified, thereby eliminating a shielding layer structure of a high-voltage charging harness to reduce the cost and weight.