27results about How to "Improve performance indicators" patented technology

This invention relates to a method for producing low-density, high-strength, and high-toughness protective steel plates from continuously cast billets, belonging to the field of metallurgy. The steel plate is an Fe-Mn-Al-C series austenitic low-density steel plate with an austenitic matrix supplemented by dispersed fine precipitated carbides, achieving high strength and high toughness, thus meeting the requirements for ballistic protection. The steel plate has a production thickness of 6-12 mm, a width of 1600-3000 mm, and a density of 6.75-7.05 g / cm³. 3 It has a density 7.85 g / cm³ higher than that of conventional steel. 3 The steel plate exhibits at least a 10% reduction in weight, good machinability and weldability, and excellent ballistic protection performance. A 6mm thick steel plate meets the NATO AEP STANAG 4569 standard Level I ballistic protection requirements, while a 12mm thick steel plate meets the NATO AEP STANAG 4569 standard Level II ballistic protection requirements. Production process: smelting—continuous casting—slow cooling—rolling—heat treatment—finishing—inspection—warehousing.

The invention discloses an adjustable air gap device of a melt-blown cloth die head and the melt-blown cloth die head thereof. The adjustable air gap device comprises an air plate, and an excitation mechanism is arranged on the back face of the air gap face of the air plate; under the excitation action of the excitation mechanism, the front end of the wind plate generates tiny elastic deformation, then the air gap face generates tiny elastic deformation, and after excitation of the excitation mechanism is removed, the shape of the air gap face is restored. The air gap surface of the air plate generates micro elastic deformation, so that the size of the air gap is changed, namely the fine adjustment of the air gap of the die head of the melt-blowing machine in production is realized, the flow rate and traction force of hot air are influenced, the positive effect of adjusting the thickness of the output silk of a melt is achieved, and the performance index of melt-blowing cloth is effectively improved.

The application belongs to the technical field of image recognition segmentation, and discloses a medical image cell segmentation and tracking method, which comprises the following steps: step 1: data processing; feature extraction: the backbone part in the model is used to extract features from the preprocessed image, and the CSPDarknet structure is adopted in YOLOv8; step 3: FPN-PAN multi-scale feature fusion; step 4: Head prediction according to multi-scale features. The application realizes real-time tracking of the motion trajectory of cells by combining with a tracking algorithm such as deepsort. The method is mainly based on the YOLOv8 framework, and the Simam attention mechanism and the multi-scale proto method are adopted to optimize the model, so that the detection effect of YOLOv8 is further improved. The application can automatically complete the analysis and detection of medical images, is high in convenience and easy to use.

The invention relates to the field of communication, and provides a filter and communication equipment. The filter comprises at least two resonators, a coupling window communicated with the interiors of the two adjacent resonators is arranged between the two adjacent resonators, and a medium piece is arranged in at least one coupling window. Based on the above structure, the coupling relationship between two adjacent resonators can be constructed as required through the coupling window and the dielectric member, and the required coupling strength and coupling polarity can be achieved, so that the coupling design between the two adjacent resonators can be simplified and optimized, and the simulation design of the filter can be facilitated. Moreover, compared with the prior art in which a fly rod is adopted to construct a coupling relationship, the dielectric member is a non-metal member, a suspension arm is not formed, and resonance with the frequency near a passband range is not additionally generated, so that the performance of the filter can be optimized and improved, and particularly, the filtering performance and the out-of-band rejection performance of the filter can be improved.

The invention relates to a preparation method of an O2-type cobalt-free lithium-rich manganese-based positive electrode material and a preparation method of a lithium ion battery. The preparation method of the O2-type cobalt-free lithium-rich manganese-based positive electrode material comprises the following steps: preparing a manganese-based carbonate precursor of the O2-type cobalt-free lithium-rich manganese-based positive electrode material, mixing the obtained manganese-based carbonate precursor with a lithium salt, and carrying out primary calcination or pre-calcination and secondary calcination on the obtained mixture to obtain the O2-type cobalt-free lithium-rich manganese-based positive electrode material. Therefore, the O2-type cobalt-free lithium-rich manganese-based positive electrode material is obtained. The positive electrode material obtained by the preparation method disclosed by the invention has the advantages of O2 type, lower nickel content than a theoretical ratio, higher specific capacity and excellent rate capability, and the highest cutoff voltage can relatively reach 5.4 V.

The application discloses a terminal circuit with bandwidth expansion and impedance matching functions, and belongs to the technical field of basic electronic circuits. In view of the defects in the prior art, the terminal circuit is designed by adopting a simplified three-stage asymmetric T-coil technology, and the terminal circuit comprises a first pad capacitor, a second pad capacitor, a first impedance matching module, a first bandwidth expansion module based on a three-stage asymmetric T-coil structure, a second impedance matching module, a second bandwidth expansion module based on the three-stage asymmetric T-coil structure, a first terminal resistor, a second terminal resistor and a load circuit. The terminal circuit can greatly enhance the bandwidth expansion capability, uses a small number of inductors and capacitors, has a good impedance matching effect, and realizes a great reduction of area overhead. Meanwhile, the application has high engineering applicability, is suitable for engineering product design, can be widely used in the design of a SerDes analog front end, can greatly improve the performance index of the analog front end, and simultaneously reduces comprehensive overhead.

This invention discloses a routing partitioning method and apparatus for large-scale low-Earth orbit satellite networks, primarily addressing the problems of high link overhead and slow convergence speed in existing satellite networks. The scheme includes: generating a spatial network topology based on constellation size, number of orbital planes, orbital altitude, and orbital inclination; dividing the constellation into multiple routing regions based on the relative positions of the satellites, establishing link state information exchange rules, a routing table storage and update mechanism, and a data packet forwarding mechanism; establishing a quantitative relationship between the number of partitions and link overhead based on the network topology, routing region partitioning results, and link state information exchange rules; establishing a quantitative relationship between the number of partitions and routing convergence time based on the dynamic topology change characteristics of the satellites, routing region partitioning results, and routing table storage and update mechanism; calculating link overhead and routing convergence time under different numbers of partitions, constructing routing performance indicators, and outputting the optimal routing partitioning result. This invention can reduce link overhead and accelerate routing convergence speed, and can be applied to large-scale satellite network communication systems.

The invention discloses a high-heat-resistance melt-blown cotton production device and high-heat-resistance melt-blown cotton prepared through the high-heat-resistance melt-blown cotton production device, the device comprises a collecting net system, and a grid base cloth unwinding system is arranged in front of the collecting net system and is responsible for releasing wound grid base cloth to the collecting net system; grid base cloth tightening devices are arranged on the left side and the right side of the collecting net system and are used for tightening grid base cloth above the net surface of the collecting net system; a melt-blowing / spinning system is arranged above the collecting net system and is responsible for spraying melt-blowing fibers to the grid base cloth on the net surface; the collection net system promotes the sprayed melt-blown fibers to be gathered on the grid base cloth through negative pressure air in the collection net system. The three-dimensional cross warp spacer fabric is used as the grid base cloth, the superfine fibers are melt-blown on the grid base cloth, the superfine fibers are mutually bonded in gaps of the spacer fabric to form a special capillary structure attached to the three-dimensional grid yarn, mutual overlapping and pressing due to dead weight are avoided, melt-blown cotton with large thickness can be manufactured, and the high-thermal-resistance material is obtained.

The invention discloses a preparation method and application of inlaid highly isotropic coke, petroleum residual oil, petroleum asphalt, heavy oil or coal tar pitch are used as raw materials, a certain amount of graphene oxide or graphene is added, melt blending is carried out at a certain temperature, heat treatment is carried out at a certain atmosphere, pressure and temperature, and the inlaid highly isotropic coke is obtained. Isotropic semicoke rich in the superfine mosaic structure is prepared, and the superfine mosaic type highly isotropic coke is obtained after the obtained isotropic semicoke with the superfine mosaic structure is calcined. The isotropic degree of the prepared coke is greatly improved, and the isotropic degree and various performance indexes of the isotropic graphite material prepared by taking the prepared isotropic coke as the raw material are greatly improved.

The utility model discloses a kind of efficient brushless hollow cup DC motor stator, including the stator core made of high saturation soft magnetic material, the middle part of the stator core is equipped with core inner hole, the inside of the core inner hole is equipped with cup type winding, and the inside of the core inner hole is attached with insulating film, the cup type winding is by several sheet hexagonal winding column and is rolled by coiling machine, the cup type winding is fixed on the inner wall of core inner hole by high temperature epoxy adhesive layer;The utility model not only guarantees the electrical insulation between stator core and winding cup, but also reduces the inconvenience caused by artificial paste insulating film, improves the quality reliability of stator, shortens manufacturing cycle, improves work efficiency;Relative to filling process, manufacturing cycle is shortened by 2 / 3.

The invention relates to a metal wiring structure for an MEMS inertial device, which comprises a first isolation layer, a first metal layer, a second isolation layer and a second metal layer which are sequentially stacked on a substrate, each of the first isolation layer and the second isolation layer comprises a plurality of isolation blocks, and two adjacent isolation blocks are arranged at intervals. The first metal layer and the second metal layer each comprise a plurality of metal blocks, and every two adjacent metal blocks are arranged at intervals and electrically connected through a wire. The invention further provides the MEMS inertial device and a metal wiring method for the MEMS inertial device. According to the invention, the isolation layer is designed into a form of a plurality of isolation blocks, so that the technical problem of large stress caused by the isolation layer grown on the whole surface in the prior art can be solved, and the wafer is prevented from deformation or warping in the technological process, thereby improving the bonding performance and performance indexes of the device; all the metal layers are divided into small blocks and connected, all the metal layers and the substrate are connected through the contact holes and are grounded or fixed in point positions, and it is guaranteed that signals of all the metal wires are stable.

The invention relates to the technical field of electronic test and measurement, and particularly discloses a complex signal multi-objective optimization system and method based on a PXIe bus, the system comprises a system controller, a PXIe bus backboard and a functional hardware module, the functional hardware module comprises a signal acquisition module, a core processing module, a signal output module and an auxiliary module; the signal acquisition module is used for converting a complex analog signal into a complex digital signal; the core processing module is used for processing the complex digital signals according to the current configuration parameters and obtaining optimized configuration parameters through a multi-objective optimization algorithm; and the signal output module is used for converting the optimized configuration parameters into actual physical signals and then outputting the actual physical signals so as to drive subsequent execution equipment or serve as feedback signals. According to the invention, the high bandwidth, low delay and modularization characteristics of the PXIe bus are utilized, and a multi-objective optimization algorithm is combined to realize efficient acquisition, processing and optimization of complex signals, so that the real-time performance, precision and flexibility of signal processing are improved.

The application relates to the technical field of power electronic converter control, in particular to an H-bridge converter control method and system based on dynamic rotation of high-frequency and low-frequency modules. The method combines real-time collection of junction temperatures and switching losses of each H-bridge module; for each H-bridge module, a first absolute difference value of the current junction temperature and the current average junction temperature is calculated, and a second absolute difference value of the cumulative switching loss and the average cumulative switching loss is calculated; according to the first absolute difference value and the corresponding temperature weight coefficient, and the second absolute difference value and the corresponding power loss weight coefficient, the rotation index of each H-bridge module is determined; and according to the rotation index of each module, a corresponding pulse control signal is generated, the high-frequency module to be rotated is switched to a low-frequency module, and the low-frequency module to be rotated is switched to a high-frequency module. Under the premise of ensuring the quality of electric energy output, the method can balance switching loss and thermal stress and other problems, and significantly improve the loss balance and temperature consistency of the H-bridge converter.

The embodiment of the application provides a preparation method of bamboo pulp culture paper, comprising the following steps: S1: providing bamboo pulp slurry and fine components; S2: grinding the fine components to form first slurry; S3: mixing the bamboo pulp slurry and the first slurry according to a dry weight mass ratio of 70-90:10-30 to form mixed slurry, wherein the beating degree of the mixed slurry is 36-40°SR, and the bamboo pulp slurry is separately beaten; and S4: obtaining the bamboo pulp culture paper through papermaking, surface sizing and drying of the mixed slurry, wherein the performance indexes of the culture paper formed through the above steps are greatly increased, and research shows that a large number of micro-fibers appear after the fine components are ground by zirconium oxide beads, the addition of the micro-fibers into the slurry can significantly increase the bonding strength between fibers, which leads to the increase of folding endurance and breaking length, and on the one hand, the bamboo pulp fibers can be fully utilized, and on the other hand, the fine components formed in the papermaking process can be treated.

This invention discloses a multi-band microwave angular error signal generation device, belonging to the field of communication and data transmission. The invention includes a sum-difference comparator, S-band left-hand circular link, X-band left-hand circular link, Ka-band left-hand circular link, S-band right-hand circular link, X-band right-hand circular link, Ka-band right-hand circular link, intermediate frequency switching matrix, X-band angular tracking error baseband signal demodulation processing module, Ka-band angular tracking error baseband signal demodulation processing module, S-band angular tracking error baseband signal demodulation processing module, and angular error signal switching unit. This invention simultaneously supports angular error extraction from left-hand and right-hand circular signals in S-band, X-band, and Ka-band, and can operate in multiple working states, improving the adaptability of the device.

The invention discloses an amorphous iron-based silicon-phosphorus composite negative electrode material and a preparation method and application thereof, the raw materials of the iron-based silicon-phosphorus composite negative electrode material comprise an iron element, a silicon element, a phosphorus element and a carbon material, the molar ratio of the silicon element to the phosphorus element is 2: 1-1: 2, the molar ratio of the silicon element to the iron element is 8: 1-1: 2, and the mass ratio of an iron / silicon / phosphorus mixture to the carbon material is 5: 5-8: 2; the iron-based silicon phosphorus composite negative electrode material is prepared by a one-step or multi-step mechanical ball milling method. In the iron-based silicon phosphorus composite negative electrode material, the introduction of the iron elementary substance induces the microstructure to be disordered and reduces the lithium ion diffusion energy barrier, and meanwhile, the iron elementary substance and the lithium phosphide formed in situ respectively provide abundant electron and ion transmission paths and cooperatively buffer the huge volume deformation of the silicon negative electrode in the lithiation / delithiation process; furthermore, the electrochemical reversibility, the cycling stability and the rate capability of the material in the lithium storage process are effectively improved.

The invention relates to the technical field of wireless communication, and provides a satellite-ground multi-target resource allocation method and device based on STAR-RIS. According to the invention, by constructing a multi-objective optimization problem, collaborative optimization is carried out on the total collected energy of energy collection users, the communication rate of outdoor communication users and the reachable secure transmission rate of indoor satellite users; a multi-objective optimization problem is decomposed into single-objective optimization problems through a weighted Chebyshev method to pursue a Pareto optimal solution, and each single-objective optimization problem is solved by adopting an alternating optimization framework fusing successive convex approximation and semi-definite relaxation, so that a complex non-convex solution problem is converted into a convex optimization problem which can be efficiently solved. After the optimized parameters are solved, beam forming strategies of the satellite and the ground base station and signal regulation and control parameters of the STAR-RIS are respectively adjusted according to the optimized parameters, so that multi-target collaborative balance of safety, rate and energy is realized, and safety threats brought by potential eavesdroppers are effectively handled.

This invention discloses a method for optimizing phase generation carrier parameters in an interferometric fiber optic sensor, belonging to the field of fiber optic sensing and signal demodulation technology. This invention selects three core key parameters—laser pump current, modulation frequency, and interferometer optical path difference—as experimental factors, and sets three different level values ​​for each factor. By using a standard orthogonal array, only nine representative experimental combinations need to be executed, output noise collected, and range analysis performed on the test data to quantify the dominant influence of each parameter on noise. This allows for the rapid selection of the optimal levels for each factor to form a globally optimal parameter set, which is then verified through supplementary experiments. This invention significantly reduces the number of experiments and costs, providing a standardized optimization process that can quickly and accurately identify the globally optimal parameter combination that minimizes system output noise, effectively improving the overall performance of the fiber optic sensor.

This application relates to a machine learning model optimization method, apparatus, computer device, computer-readable storage medium, and computer program product. The method includes: acquiring an original model and determining the corresponding original computation graph; determining the computational logic of each operator as a function of the input data, and classifying each operator into static or dynamic operators based on the changes; pre-compiling adjacent static operators in the original computation graph to obtain at least one static computation unit; wherein, the pre-compilation is used to enable adjacent static operators to be executed through a single scheduling instruction; generating dynamic computation units corresponding to the dynamic operators in the original computation graph to obtain at least one dynamic computation unit; and combining the at least one static computation unit with the dynamic computation unit according to data dependencies to obtain the optimized model corresponding to the original model. This method can improve the resource utilization of model processing, such as large language models.

The application relates to the communication technical field, and provides a filter and a communication device, the filter comprising: a shell structure, an internal resonant cavity is formed in the shell structure, the shell structure comprises oppositely arranged connecting parts and deformation parts; a resonator is located in the resonant cavity and is connected to the connecting parts or the deformation parts; and an adjusting piece is located in the resonant cavity and is connected to the connecting parts and the deformation parts; wherein a through hole is formed in the connecting parts or the deformation parts, and the adjusting piece is located in the through hole; the adjusting piece can be stressed to move relative to the connecting parts and / or the deformation parts, thereby driving the deformation parts to deform. The filter provided by the application can not adopt the scheme that a tuning screw is threadedly connected with a cover plate, a new tuning mode is provided, more possibilities are provided for improving the problem that the threaded connection between the tuning screw and the cover plate easily influences the performance of the filter, and the performance index of the filter is improved in the case of facilitating tuning.

The application relates to an air leaf-removing type leafy vegetable batch purification and packaging integrated device, and relates to the technical field of agricultural machinery. The device is used for solving the problems of high leaf-removing damage rate, low treatment efficiency, poor equipment adaptability, low intelligent degree and narrow variety adaptability in the existing leafy vegetable purification and packaging process. The device comprises a conveying mechanism, a root-removing mechanism, a leaf-removing mechanism, a packaging mechanism and a controller. The conveying mechanism, the root-removing mechanism, the leaf-removing mechanism and the packaging mechanism are electrically connected with the controller. The root-removing mechanism is arranged on one side of the rear end of the root-removing conveying mechanism. The leaf-removing mechanism is arranged in the middle of the leaf-removing conveying mechanism. The packaging mechanism is arranged on the packaging conveying mechanism. The leafy vegetables are subjected to root removal through the root-removing mechanism on the root-removing conveying mechanism, then enter the leaf-removing conveying mechanism, are subjected to air leaf-removing through the leaf-removing mechanism on the leaf-removing conveying mechanism, then enter the packaging conveying mechanism, and are subjected to screening and weighing through the packaging mechanism on the packaging conveying mechanism, and are then packaged and bagged. The device is used for leafy vegetable processing.

The utility model discloses a non-coal mine safety fan which comprises a fan body, a mounting cylinder is arranged on the outer side of the fan body, clamping rods are fixedly connected to the two sides of the mounting cylinder, clamping sleeves are arranged on the outer sides of the clamping rods in a sleeving mode, locking sleeves are arranged on the outer sides of the clamping sleeves, a plurality of locking grooves are formed in the outer sides of the clamping sleeves, and releasing sleeves are arranged on the outer sides of the clamping sleeves. A locking frame is arranged on one side of the release sleeve, a locking rod is arranged in the locking frame, a sliding groove is formed in the clamping sleeve, a clamping block is arranged on the outer side of the clamping rod, a moving groove is formed in the outer side of the clamping rod, a movable groove is connected to one end of the moving groove, a positioning groove is connected to the other end of the movable groove, a release groove is formed in the inner side of the release sleeve, and a clamping groove is formed in the inner side of the clamping sleeve. According to the fan protection device, the safety protection of the fan is realized, the mounting stability of the protection plate is ensured while the protection plate is conveniently disassembled and assembled, and the stable use of equipment is ensured.

The application discloses a method for manufacturing photovoltaic BC cells by using inkjet printing hot melt ink, which comprises the following steps: step 1, silicon wafer pretreatment; step 2, hot melt ink preparation; step 3, inkjet printing equipment debugging; step 4, P area mask manufacturing; step 5, etching back process for manufacturing P area; step 6, removing P area mask; step 7, N area mask manufacturing; step 8, etching back process for manufacturing N area; step 9, high-temperature activation and doping optimization; and step 10, subsequent processing. The method can overcome the problems of complex process, high cost and poor mask stability in the prior art, and achieve the goals of simplifying the process, reducing the cost, improving the cell performance and production efficiency.

This invention belongs to the field of soft magnetic materials technology, and discloses a high-performance Fe-Y-B ternary amorphous soft magnetic alloy thin strip based on trace yttrium purification of the melt to inhibit surface crystallization and its preparation method. The atomic percentage composition of this alloy satisfies Fe (85‑x) Y x B 15 (0.5≤x≤3.0) or Fe 85 Y y B (15‑y) (0.5≤y≤3.0). This invention introduces trace amounts of rare earth element Y into a Fe-B binary alloy. Utilizing the high affinity of Y for impurity elements in the melt, compounds are formed during the smelting process and floated to the surface for removal, thus deeply purifying the melt. This fundamentally eliminates the nucleation sites for heterogeneous α-Fe on the thin strip surface during rapid quenching, completely suppressing surface crystallization. The resulting alloy thin strip possesses a completely amorphous structure, maintaining high saturation magnetic induction while exhibiting high amorphous formation capability, extremely low coercivity, and high effective permeability. This invention features a simple composition and good process compatibility, solving the problem of simultaneously achieving surface crystallization and soft magnetic properties in high-iron-content Fe-based amorphous alloys.

The invention discloses a 3D printing control system and method based on a building structure, and relates to the technical field of printing control. According to the system, building design indexes are converted into definite quantitative constraints by capturing dynamic rheological characteristic changes of a cement-based 3D printing material, an optimal printing parameter combination matched with the current material state is dynamically matched, initial parameter deviation is eliminated through a PI D real-time correction mechanism, and the optimal printing parameter combination is obtained. Finally, optimal parameter updating and secondary correction closed loop are achieved by means of printing quality real-time evaluation performance deviation feedback, rheological property fluctuation caused by cement mixture moisture evaporation, hydration reaction and the like can be adapted in real time, dynamic matching of printing parameters, material states and structural design requirements is ensured, and the printing quality is improved through full-process closed-loop control. And the performance index of the formed building is improved, the printing defect and reworking risk caused by improper parameter adaptation are reduced, and the forming quality and reliability of the 3D printed building are improved.

A computerized method has the steps of generating an input computational graph (CG) for representing a neural architecture, and performing a plurality of optimization steps in at least one iteration to obtain a modified neural architecture represented by the modified CG, thereby obtaining a neural network for use in one or more computing devices. The optimization step includes identifying one or more sub-graphs in the input CG, obtaining the modified CG by replacing the identified one or more sub-graphs with one or more replacement sub-graphs, respectively, evaluating one or more indicators of the modified neural network architecture represented by the modified CG, and, in accordance with the evaluation, modifying the one or more indicators of the modified neural network architecture. And selecting the modified CG or the input CG. When the optimization step is performed in multiple iterations, the selected CG obtained in one iteration is used as the input CG in the next iteration.

The invention belongs to the technical field of crystal material preparation, and particularly relates to a method for growing sapphire crystals by a wide seed crystal edge-defined film-fed crystal growth method, which comprises the following steps of: firstly, preparing an Al2O3-based raw material through multi-step sintering, carrying out acid etching microstructuring treatment on R / M surface seed crystals, arranging an array type feeding seam mold above a crucible during charging, and carrying out vacuum replacement for three times, so as to obtain a sapphire crystal; a gradient temperature field is established through three-area independent temperature control, seeding is performed after melt is immersed into a mold, the growth process comprises seeding, shouldering and equal-diameter growth, wide diameter expansion and equal-diameter growth of crystals are realized by accurately controlling the pulling rate, the crucible rising speed and the three-section power of a middle heating area, and the crystals are automatically separated from the mold; and high-temperature, medium-temperature and low-temperature three-stage gradient annealing is carried out under argon protection to release stress and stabilize the structure, so that the transverse temperature gradient can be accurately controlled below 5 DEG C / cm, the problem of large temperature difference between the edge and the center during wide seed crystal growth is solved, and the stability of the solid-liquid interface shape and the uniformity of crystal growth are ensured.