17results about How to "Good controllability" patented technology

The present application relates to industrial wireless network technology, in particular to a resource scheduling method of 5G driven networked control system, which is suitable for 5G driven networked control system composed of multiple independent discrete linear subsystems and shared 5G network. Considering the packet loss problem of sensing data and control instructions of 5G driven networked control system, the optimal state estimator and LQG control law are given. By analyzing the internal relationship between LQG cost and 5G transmission reliability, the resource scheduling problem is converted into an integer programming problem. Further, a resource scheduling method is proposed, which allocates the optimal transmission resource and scheduling parameter to each subsystem according to the state of each subsystem in each control period, so as to realize the minimization of expected LQG cost.

This application relates to the field of two-dimensional semiconductor material preparation technology, specifically to a method for preparing monolayer molybdenum disulfide by dual-sulfur source chemical vapor deposition, comprising the following steps: Step 1, providing a chemical vapor deposition reaction chamber having an upstream region, a growth region, and a downstream region; Step 2, arranging a molybdenum-containing precursor in the growth region, and arranging a substrate above or opposite to the molybdenum-containing precursor; Step 3, arranging a first sulfur-containing precursor in the upstream region and a second sulfur-containing precursor in the downstream region; Step 4, introducing a carrier gas into the reaction chamber and heating it to cause the first sulfur-containing precursor, the second sulfur-containing precursor, and the molybdenum-containing precursor to volatilize and undergo a chemical vapor deposition reaction on the substrate surface to form a monolayer molybdenum disulfide. This invention employs a dual-sulfur source strategy, achieving large-size, uniform, and low-defect preparation of monolayer MoS2, facilitating widespread application.

The invention relates to a permanent magnet synchronous motor model prediction control method and system, belongs to the technical field of permanent magnet synchronous motor driving, and solves the problem that parameter robustness and dynamic performance cannot be considered when parameter mismatch occurs in permanent magnet synchronous motor model prediction control in the prior art. Comprising the steps of obtaining sampling values of stator current, stator voltage and electrical angular velocity at a current sampling moment and two previous moments and a direct current bus voltage at the current sampling moment, further updating incremental current prediction errors and time sequence sampling data of incremental voltage, and further obtaining a first sample vector and a second sample vector at the current sampling moment; and then a small-batch stochastic gradient descent method is adopted to obtain an identification value of a parameter mismatch coefficient at the current sampling moment, then stator current prediction values of different voltage vectors at the next moment are obtained, then an optimal voltage vector is obtained, and permanent magnet synchronous motor model prediction control at the next moment is carried out based on the optimal voltage vector.

The present application belongs to the technical field of traditional Chinese medicine, and specifically discloses a traditional Chinese medicine composition for treating children's functional dyspepsia, a preparation method and application thereof. The traditional Chinese medicine composition is prepared from the following raw medicinal materials by weight: Fructus Aurantii Immaturus 5-20 parts, Magnolia officinalis 5-20 parts, Forsythia suspensa 5-30 parts, Dendrobium 5-30 parts, Atractylodes macrocephala 5-20 parts, and Glycyrrhiza 5-30 parts. The pharmacological experiment results show that the traditional Chinese medicine composition has the effects of improving gastrointestinal motility and regulating gastrointestinal hormone secretion, has a significant therapeutic effect on children's functional dyspepsia, has stable curative effect, and has a small dosage. Meanwhile, the present application has the advantages of simple process operation, low cost, good controllability and stability, and is suitable for industrialized mass production.

This invention discloses a frame-based screw-connected powertrain suspension bracket structure, including a frame crossbeam. A left end plate, a right end plate, and a lower end plate are connected to the frame crossbeam. Both the left and right end plates have mounting bolt connection holes. The left and right end plates each have connecting flanges on their sides. The lower end plate has a connecting portion. One end of the connecting flange and one end of the connecting portion are respectively connected to the top and bottom of the frame, and the other end of the connecting flange is connected to the other end of the connecting portion. Using this frame-based screw-connected powertrain suspension bracket structure improves layout flexibility, optimizes the dynamic stiffness and vibration isolation performance of the mounting point, and enhances connection reliability.

The invention provides an efficient thin-film gallium arsenide solar cell and a preparation method thereof. The solar cell at least comprises a gallium arsenide substrate, a GaAs nucleating layer, a GaInP corrosion barrier layer, a lattice gradient buffer module, a GaInAs cap layer, an AlGaInP top cell, an AlGaInAs / AlGaInP tunnel junction, a GaInAs bottom cell and a GaInAs back cap layer which are sequentially distributed in the thickness direction of the solar cell. The AlGaInP top battery comprises an (AlGa) 1-bInbP emitter region layer and an (AlGa) 1-cIncP base region layer, b is greater than or equal to 0.4 and less than or equal to 1, and c is greater than or equal to 0.4 and less than or equal to 1; the GaInAs bottom cell comprises a Ga1-dIndP emitter region layer and a Ga1-eIneAs base region layer, 0.4 < = d < = 1, and 0.01 < = e < = 0.5. Through band gap optimization and addition of the lattice gradient buffer module, the photoelectric conversion efficiency of the two-junction gallium arsenide solar cell is improved, the typical efficiency of the two-junction solar cell is improved to 30% from 25%-26% at present, the performance index is directly benchmarked with a mainstream three-junction solar cell, and the efficiency of the two-junction gallium arsenide solar cell is greatly improved. And a competitive technical scheme is provided for the application of high-performance and low-cost solar cells.

This invention discloses a fluorescence emission-independent excitation carbon quantum dots and its preparation method. The method includes: Step 1, mixing o-phenylenediamine and boric acid at a molar ratio of 4 mmol:(1.2~4 mmol), grinding the mixture, transferring it to a square ceramic boat, and placing it in an oven. Under air atmosphere, the temperature is increased from room temperature to 100~135℃ at a heating rate of 5℃ / min, and the solid-phase reaction is carried out for 4~6 h. The mixture is then naturally cooled to room temperature to obtain a brownish-red solid; Step 2, dissolving the brownish-red solid in deionized water and sonicating it to obtain a yellowish-brown liquid; Step 3, filtering the yellowish-brown liquid to obtain a pure carbon quantum dot aqueous solution; Step 4, freeze-drying the carbon quantum dot aqueous solution to obtain carbon quantum dot powder. This invention simplifies the process flow, reduces energy consumption and post-processing complexity, and provides controllable reaction process. The prepared carbon quantum dots exhibit fluorescence emission-independent characteristics and long-wavelength orange fluorescence.

The application discloses a microwave-responsive hydrogel dressing and application thereof in preparation of an anti-diabetic chronic infection wound preparation. The raw material of the hydrogel dressing disclosed by the application comprises: (A) a hydrogel matrix; (B) glucose oxidase; (C) a nano-enzyme composition, wherein the nano-enzyme composition at least comprises a luteolin-manganese dioxide composite; wherein the luteolin-manganese dioxide composite is a solid-phase product obtained by wet blending of luteolin and nano-manganese dioxide. Under microwave irradiation, the heat effect generated by the microwave causes the hydrogel dressing to heat up, the heat-enhanced glucose oxidase consumes glucose to generate hydrogen peroxide, and at the same time, the heat-enhanced luteolin-manganese dioxide composite decomposes the hydrogen peroxide to generate oxygen, thereby simultaneously relieving high glucose and hypoxia, fundamentally breaking the vicious cycle of "high glucose-hypoxia-infection-chronic inflammation" of the diabetic wound, and finally improving the antibacterial effect on the skin wound.

The invention discloses a warehouse layout planning method and device, and relates to the field of warehouse logistics. A specific embodiment of the method comprises the steps of obtaining storage layout description information, a preset business index and an expected value of a warehouse, and generating a storage layout code based on the storage layout description information; generating a storage layout map based on the storage layout code, and inputting the storage layout map into a preset evaluation model to obtain an evaluation value under each preset business index; in response to the situation that any evaluation value does not reach the corresponding expected value, optimizing the storage layout code and re-executing the conversion and evaluation operations until all the evaluation values reach the corresponding expected values; and executing a warehouse layout planning operation on the warehouse based on a warehouse layout map generated by the final optimized warehouse layout code. According to the embodiment of the invention, through a coding-evaluation-optimization automatic iteration process, intelligentization and high efficiency of warehouse layout planning are realized, and the quality and efficiency of warehouse layout planning are significantly improved.

The application relates to a terminal forced sliding mode collaborative direct speed control method of an SMPMSM driving system, which comprises the following steps: in a synchronous speed rotating dq axis coordinate system, an SMPMSM driving system hyperlocal model of speed control is established; a macro variable containing a sliding surface is designed, and a dynamic evolution equation containing a non-singular terminal term is proposed; system voltage and current constraints are processed; finally, a terminal forced sliding mode collaborative direct speed control law is generated to realize high-performance speed control. The non-singular terminal dynamic evolution equation designed in the application can significantly improve the convergence speed of the macro variable approaching the flow field and improve the dynamic response of the system. Therefore, the terminal forced sliding mode collaborative direct speed control proposed in the application has a more superior speed fast dynamic response on the premise of guaranteeing the speed and current steady-state control performance.

The present application relates to lithium battery electrode material technical field, specifically to a kind of fluidized bed element doped silicon-carbon negative electrode material and its preparation method, lithium battery;Preparation method includes: the boron lithium compound is placed in heating container, inert carrier gas is imported, heating makes it be gaseous form, carrier gas is connected fluidized bed reactor gas path, gaseous boron lithium compound is imported into the fluidized bed that has been ahead of time into porous carbon, boron lithium element co-doping is carried out;Then again pass into silane mixed gas, gas phase cracking deposition silicon, form boron lithium element co-doped silicon-carbon material, or the addition timing of silane mixed gas is same with the addition timing of gaseous boron lithium compound;Finally pass into carbon source, carry out CVD carbon coating;The carbon-coated boron lithium element co-doped silicon-carbon material prepared by the present application can improve ion diffusion rate and electronic conductivity, significantly improve battery kinetics and initial efficiency.

The invention provides a preparation method of an ultrathin porous CoFeMoO4-based nanosheet electrocatalyst and an application of the ultrathin porous CoFeMoO4-based nanosheet electrocatalyst in a photovoltaic-water electrolysis hydrogen production system. Through solvent heat treatment and surface engineering, the Fe element is introduced, and meanwhile, the ultrathin nanosheet catalyst with a mesoporous structure is constructed, so that the ultrathin nanosheet catalyst shows excellent oxygen evolution reaction activity and stability. Co and Fe elements in the catalyst have moderate adsorbability to oxygen evolution reaction intermediates, the specific surface area, the activity of active sites and the ion / electron transmission rate of the catalyst are improved through multiple strategies such as electronic engineering and structural engineering, and overpotential and energy loss are remarkably reduced. A photovoltaic system and a water electrolysis system are coupled, a commercial monocrystalline silicon thin film cell is used as the only energy input, and the catalyst realizes high solar energy-hydrogen energy conversion efficiency and stability. The technical synthesis steps are simple, no precious metal participates in, efficient and stable green hydrogen energy production is achieved, and clean fuel can be synchronously generated under the mild condition through solar energy driving.

The invention belongs to the technical field of extracorporeal circulation control, and discloses an artificial heart-lung machine multi-pump cooperative control system which comprises a main circulation loop, an auxiliary recovery loop, a pump set, a parameter acquisition unit and a control unit. The control unit is used for determining the target single-time feedback amount and controlling the recycling pump to perform feedback for several times according to the perfusion flow, the drainage flow, the venous pressure, the blood storage liquid level and the recycling liquid level, collecting parameters again after feedback, judging feedback conditions again, and entering a limited safety mode when collection is abnormal. The system is used for multi-pump cooperative control in the extracorporeal circulation process of the artificial heart-lung machine.

This application relates to an image inpainting method and system based on a deep learning-based interactive network. The method includes: acquiring a target image to be inpainted, the target image having multiple damaged regions; using a deep learning-based interactive segmentation network to process the target image after selecting the damaged regions using a preset method, generating a target mask image corresponding to the target image, the target mask image being used to represent the damaged regions to be inpainted in the target image; jointly inputting the target mask image and the target image into a preset image inpainting model, and outputting the inpainted image. This application solves the problem in related technologies where only considering the inpainting network's inpainting effect during image inpainting easily leads to image inpainting failure and poor image inpainting results. It achieves the beneficial effects of obtaining accurate damaged regions, obtaining images that conform to human visual perception, and having good flexibility and controllability in image inpainting.

The embodiment of the specification discloses an offline intelligent wearable device NFC service processing scheme. Including: controlling the NFC card reader on the offline intelligent wearable device to be in a closed state; receiving an NFC service trigger instruction; entering a designated service application, and automatically switching the NFC card reader from the closed state to the open state through the designated service application; reading target information from a target NFC device through the NFC card reader in the open state, and writing user information of the offline intelligent wearable device to the target NFC device, so that the target NFC device interacts with the service end of the designated service application according to the user information, and executes corresponding target service; according to the target information, a short-distance wireless communication connection is established with the target NFC device, and the execution result of the target service returned by the target NFC device is received, wherein the maximum communication distance corresponding to the short-distance wireless communication connection is greater than the NFC communication distance of the target NFC device.

The invention relates to a method for preparing a thin-layer carbon-coated positive electrode material by adopting a liquid-phase organic carbon source, which comprises the following steps of: introducing a liquid-phase organic matter serving as a carbon source into a positive electrode active material system such as lithium iron phosphate, forming an adsorption or interface modification structure on the surface of a positive electrode material particle by the carbon source, performing solid-liquid separation, and performing in-situ carbonization under a protective atmosphere to obtain the thin-layer carbon-coated positive electrode material. And constructing a continuous thin-layer carbon coating structure on the surfaces of the positive electrode material particles to obtain the thin-layer carbon coated positive electrode material. The method is simplified in process, convenient to operate, low in cost and suitable for large-scale preparation; the obtained material is good in carbon layer continuity and high in interface stability, and is beneficial to improvement of electronic conductivity and reduction of electrode polarization, so that the rate capability and the cycle stability are improved, meanwhile, the particle surface structure stability can be improved, transition metal dissolution is inhibited in the cycle process, and the long-term cycle stability of an electrode is improved. The method is suitable for various lithium ion battery positive electrode material systems, and is especially suitable for lithium ion batteries with relatively high requirements on rate capability and cycle life.

This invention belongs to the field of wire bonding technology and discloses a bonding method and application of copper-based bonding wires. The bonding method includes the following steps: depositing a composite metal interlayer at the bonding location on the chip; contacting the bonding end of the copper-based bonding wire with the composite metal interlayer and performing ultrasonic bonding to complete the bonding of the copper-based bonding wire; wherein, in the ultrasonic bonding step, three sets of ultrasonic power and bonding pressure are applied sequentially, satisfying the following conditions: second ultrasonic power > third ultrasonic power > first ultrasonic power, and second bonding pressure ≥ third bonding pressure > first ultrasonic power. This invention effectively overcomes the technical bottlenecks of easy chip damage and easy formation of brittle intermetallic compounds at the bonding interface when copper-based bonding wires are applied to IGBT chips, through the synergistic effect of the composite metal interlayer and the multi-stage gradient ultrasonic bonding process. It achieves a high-strength, non-destructive connection between the copper-based bonding wire and the chip pad, significantly improving the long-term reliability and stability of the bonding interface.