475results about How to "Achieve refinement" patented technology

The present invention discloses one kind of composite material of modified micro plant fiber powder and natural rubber and its preparation process and application. The composite material includes natural rubber or latex 100 weight portions, modified micro plant fiber powder 1-60 weight portions, sulfur 0.5-3.3 weight portions, promoter 1.2-4.3 weight portions, antiager 1-3 weight portions and other assistant. The preparation process includes mixing, forming, vulcanizing and other steps. The composite material has high tensile strength, high tearing strength, high ageing resistance, high virus permeation resistance, etc. and may be used widely in making urinary catheter, blood transfusion tube, condom, medical gloves and other products.

The invention relates to a road traffic OD information collection system for license plate recognition data, which comprises three subsystems of a roadside data collection subsystem, a roadside communication subsystem and a license plate recognition collection and processing platform subsystem; high-speed communication, transmission and data invocation between the data collection subsystem and the license plate recognition subsystem are finished by utilizing the roadside communication subsystem. The processing method comprises the following working steps from step 1 to step 7: storing and uploading the license plate recognition information of an external field collection section; secondary cleaning and secondary recognition; tracing and updating vehicle routes in real time; processing single-vehicle track tracing and revising single-vehicle OD errors caused by errors generated during the license plate information collection and transmission; counting the number of specific vehicles with the same types, the same starting points and destinations and in the same period when passing through the destinations; classifying and storing the revised OD values according to the information of the statistics periods, the vehicle types, the destinations and the like; and displaying an OD distribution matrix in forms of reports and graphs.

The disclosure relates to a content acceleration method and system. The method comprises: a client obtains an IP address of an agent node which the client belongs to from a management control center server and establishes a transparent agency relation with the agent node which the client belongs to; the agent node which the client belongs to receives a request that is sent by the client and is about internet content obtaining and determines whether the request internet content is buffered locally; if the content is buffered locally and is not expired, the content is returned to the client; and otherwise, the agent node which the client belongs to inquires whether other agent nodes buffer the content at the management control center server; if so, the IP address of the agent node with the buffered content is returned to the agent node which the client belongs to; the agent node which the client belongs to establishes connection with the agent node with the buffered content, obtains the content from the agent node, and forwards the content to the client; and if no agent node has buffered the content, the agent node which the client belongs to makes a request about the content to the internet. With the method and system, rapid response of the content can be guaranteed.

The invention discloses a retinal vessel segmentation method based on combination of deep learning and a traditional method and relates to the fields of computer vision and mode recognition. According to the method, two grayscale images are both used as training samples of a network, corresponding data amplification, including elastic deformation, smooth filtering, etc., is done against the problem of less retinal image data, and wide applicability of the method is improved. According to the method, an FCN-HNED retinal vessel segmentation deep network is constructed, an autonomous learning process is realized to a great extent through the network, convolutional features of a whole image can be shared, feature redundancy can be reduced, the category of multiple pixels can be recovered from the abstract features, a CLAHE graph and a gauss matched filtering graph of the retinal vessel image are input into the network, an obtained vessel segmentation graph is subjected to weighted average, and therefore a better and more intact retinal vessel segmentation probability graph is obtained. Through the processing mode, the robustness and accuracy of vessel segmentation are improved to a great extent.

The invention provides a method and a device for preparing high-performance aluminum-base composite material under the action of the pulsed magnetic field with the in situ crystallization method, belonging to the technical field of material preparation. The method comprises the following steps: smelting to synthesize compound material melt at the temperature of 10-200 DEG C higher than the compound material melt liquidus temperature and pouring the compound material melt into a specially-designed crystallizer to make the compound material melt solidify under the action of the pulsed magnetic field. The pulsed magnetic field has the key parameters of the pulse width of 1-500 ms and the amplitude strength of 0.1-50T. The pulsed electromagnetic force is applied to the process of solidifying the compound material melt under the action of the pulsed magnetic field so as to refine the matrix structure and the particle reinforced phase of the compound material at the same time, control the growth of the particle reinforced phase in cluster, increase the bonding strength of the interface of the particle reinforced phase and the matrix and obviously improve the performance of the composite material.

The invention relates to a mobile type indoor disinfectant vapor disinfection system, which comprises a disinfectant vapor generation device, a wireless intelligent control system, a power-driven device, an environmental monitoring device, an air supply device, a mobile device and a disinfectant storage device. The disinfectant vapor generation device comprises a disinfectant vapor three-level refinement system, a filtering and catalyzing integrated system and a vapor generation control device; the air supply device supplies secondary power for scattering vapor in a space; and the wireless intelligent control system is communicated with the environmental monitoring device, the air supply device and the power-driven device so as to finish the operations of controlling the disinfectant vapor generation device, acquiring environmental parameters, and switching on / off the air supply device and the power-driven device in a disinfection target. The mobile type indoor disinfectant vapor disinfection system can intelligently, comprehensively and efficiently finish the disinfection operation of a closed space of large-sized equipment and is particularly suitable for the disinfection operation of a closed space with long and narrow passages, so that the mobile type indoor disinfectant vapor disinfection system has the advantages of strong maneuverability, high disinfection efficiency, no secondary pollution, and the like.

The invention relates to a plastic forming technique and a powder metallurgical technique, in particular to a nano crystal tungsten based alloy block material and a method for preparing the same. The block material comprises the following components in weight percentage: 86 to 88 percent of W, 6.5 to 7.5 percent of Ni, 2.5 to 3.5 percent of Fe, 2 to 4 percent of Mo and 1 to 2 percent of Co. The preparation method comprises the following steps: Fe-Co-Ni and W-Mo after dry mixing are ball milled in advance respectively until the Fe, Co and Ni completely form solid solution, and tungsten phase crystal grain is thinned to below 100nm; the Fe-Co-Ni and W-Mo are subjected to high energy ball milling until the Fe-Co-Ni is evenly distributed around the W-Mo crystal grain; and the discharge plasma rapid sintering is adopted. The nano crystal tungsten based alloy block material has the advantages of reasonable formula, even and thin microstructure, nearly full compact, higher hardness and tensile strength and good specific elongation, and the method for preparing the block material effectively improves the mechanical performances of the sintering material.

The invention belongs to the technical field of environment supervision, and discloses an environmental protection gridding supervision management platform. The environmental protection gridding supervision management platform is mainly formed by a personnel management module, an environmental protection grid construction module, a grid supervision management module, a pollution source informationmodule, an environment supervision law enforcement module, a culture on-line module, an environment supervision one-picture module and a background management module, wherein background management sub-modules include an information query module, an environmental protection propaganda module, a statistic analysis module, a system operation management module and the like. By means of various advanced technologies, such as computer internet, mobile communication, GPS satellite positioning, and GIS geographic information system, according to the principle "possession management, graded responsibility, complete coverage, and responsibility to people", the environmental protection gridding supervision management platform can realize integrated management of personnel and equipment and integratethe environment supervision resources by binding with an ID number of terminal equipment, such as a mobile phone and a flat computer, thus enabling the environmental protection grid inspection staffto use the terminal equipment to efficiently carry out works, such as environmental protection propaganda, environment supervision and mobile law enforcement.

Provided is a method for monitoring the pouring and rolling construction quality of a roller compacted concrete dam in real time. Monitoring terminals installed on a leveling machine and a rolling compaction machine respectively are used for acquiring coordinates of the leveling machine and coordinates of the rolling compaction machine in real time, and performing real-time correction on the current coordinates of the leveling machine and the current coordinates of the rolling compaction machine, and an exciting force induction device in the corresponding monitoring terminal is used for acquiring the vibration state of the rolling compaction machine in real time; the corrected coordinates of the leveling machine, the corrected coordinates of the rolling compaction machine, the exciting force state of the rolling compaction machine and current time are sent to a remote database server through a wireless network; the remote database server is used for analyzing and processing real-time data in real time; the travelling track of the leveling machine and the travelling track of the leveling machine are dynamically drawn on a client in real time and displayed in real time; fifth, the remote database server judges whether construction parameters meet the control standard of construction quality or not; after construction of a monitored storehouse ends, and graphical reports are generated on the client and display the construction quality condition of the construction layer of the monitored storehouse. The method can improve the construction quality control level and the control efficiency of the dam.

The invention relates to an assembled construction method of electromechanical pipelines based on the BIM technology, which comprises the steps of partitioning a S1 prefabricated processing model; S2model creation; S3 model processing; S4 Prefabricated machining drawing and prefabricated material list are issued; S5 machining components; S6 Assembly details; S74D construction simulation; S8 On-site assembly installation, acceptance and commissioning; S9 Completion of the BIM model. The invention can increase the quantity, the kind and the specification of the BIM virtual component, reduce thetype and the quantity of the prefabricated component, realize the cooperation and the docking with the prefabricated factory, help the workers to understand the design intention better through the visual and visual expression, help the workers to improve the accuracy and the quality efficiency of the production, improve the construction efficiency, and reduce the cost. Realize the digitization, refinement and visualization management of project schedule, construction scheme, quality, safety and other aspects, so that the project data can be traceable.

The invention provides a preparation method of a superfine crystal inoculating agent for aluminum alloy grain refinement and relates to aluminum-based alloy and is a method for preparing nano-crystalline Al-Ti-B-Re thin-strip intermediate alloy by a rapid solidification technology of metal, wherein the method comprises steps as follows: proportioning 5-5.4% of Ti, 1-1.04% of B, 1-1.2% of Ce, 0.05-0.2% of La and the balance of Al according to determined ingredients; weighing raw materials Al-5Ti-1B intermediate alloy and lanthanum cerium alloy to proportion the materials; melting in vacuum to obtain blocky Al-5Ti-1B-1Re intermediate alloy; carrying out rapid solidification to obtain the superfine crystal inoculating agent for the aluminum alloy grain refinement, wherein the superfine crystal inoculating agent is the nano-crystalline Al-5Ti-1B-1Re intermediate alloy. With the adoption of the method provided by the invention, adverse impact of needlelike TiAl3 on the matrix structure is eliminated, nucleating particles TiAl3 with thinner size and more dispersed distribution are obtained, and superfine nucleating particles are realized.

The invention discloses an all-angle and rapid fingerprint recognition method that makes recognition according to fingerprint details: a. image preprocessing: using local gray level variance method to segment out the area of the fingerprint image; using a directional filtering method to realize binaryzation of fingers in the area of the fingerprint image; using an improved blend OPTA algorithm to make refining treatment to the binary image; b. fingerprint feature extraction: using Poincare method to test and make statistic of the number of core points of fingerprint to make sure of the reference point of fingerprint and the reference direction of fingerprint, and to extract the information of fingerprint feature point in the thinned fingerprint image; c. feature matching: taking the reference point as the point of origin, and taking the reference direction as the principal axis; using a polar coordinate to signify the fingerprint feature point axis, which is taken as characteristic data of template fingerprints; matching the data with the characteristic data of master plate fingerprints to judge whether to anastomose. The novel method can effectively restrain the influence brought from the parallel movement and rotation of the fingerprint image, and can rapidly make out judgement, thereby being suitable for a plurality of running platforms such as large-scale computers, DPS, embedded systems, satisfying the requirements on various personal identification occasions, and having broad market prospect and extremely high economic value.

The invention discloses a method for preparing ultra-fine grains by repeatedly upsetting extrusion and large deformation, belonging to the technical field of ultra-fine crystal material preparation. The method comprises: two dies different in size of die cavities are combined; the repeatedly upsetting extrusion and deformation process of stocks in the two dies are realized by controlling the die cavity size of the dies and the deformation size of the stocks; finally the inner microstructures of the stocks are changed into the ultra-fine grains to obtain block materials of the ultra-fine grains. The repeated and polydirectional upsetting extrusion and deformation not only conduce to the refining of the grains but also conduce to the repeated deformation of the two dies, realize large deformation of the stocks and are characterized in that the upsetting extrusion and deformation are suitable for diverse materials and have simple process. Owing to low manufacturing cost and excellent property, the method has strong market competitiveness and popularization and application value.

The invention provides a nanometer granule reinforced metal-based amorphous composite material and a preparation method thereof. In the method, the Ni-W-P / CeO2-SiO2 amorphous composite material of which the thickness is between 54 and 251 micrometers is prepared on the surface of ordinary carbon steel in electrolyte by utilizing dipulse electrolytic deposition for 1.5 to 6 hours under the action of ultrasound, mechanical stirring and the common dispersion of two surfactants. In the nanometer granule enhanced metal-based amorphous composite material, the electrolyte is high in stability, homogeneous plating capacity, current efficiency and deposition rates. CeO2 and SiO2 nanometer granule reinforced phases in the amorphous composite material are dispersed, the sizes of matrix metal granules ranges from 1 to 2 micrometers, and the composite material has a compact tissue structure, a thick deposition layer and high plating microhardness, is combined with a matrix firmly and can be used as surface functional plating layers of equipment parts of metallurgy, chemical industries, tobaccos, machines and the like.

The invention discloses an intelligent and precise control method for a chicken feeding system, and aims to provide an automatic control method for a chicken feeding device. The technical point is that the method comprises the following steps: (1), a control processor detects the quantity of foodstuff in each feeding trough after receiving a feeding signal so as to determine the feeding trough of which the feedstuff quantity reaches the set quantity; (2), the control processor controls a convey device to start conveying foodstuff and the foodstuff is conveyed to each leakage device by the convey device; (3), the control processor switches on a second switching device of the foodstuff output port of the leakage device corresponding to the feeding trough of which the foodstuff quantity does not reach the set quantity, so as to start leaking; and (4), the control processor sequentially and circularly detects whether the foodstuff quantity of each feeding trough reaches the set quantity or not, switches off the second switching devices of the leakage devices corresponding to the feeding troughs of which the foodstuff quantities reach the set quantity, so as to stop leaking, switches off a first switching device of a feeding device, and controls the convey device to stop conveying foodstuff and switches off the second switching devices of all the leakage devices when detecting that the foodstuff quantities of all the feeding troughs reach the set quantity.

The invention discloses a process for preparing and refining galactomannan-oligosaccharide by a microwave combined enzyme method, which prepares the galactomannan-oligosaccharide by taking galactomannan glue endosperm slices as raw materials through the steps of kneading alkalization, microwave treatment, enzymolysis, membrane separation refining, and spray drying. The process has the advantages of wide raw material source, short production period, low cost, high oligosaccharide content and the like, and the product can be used as a functional food raw material.

The invention discloses a high-strength aluminum alloy subjected to carbonitride complex treatment and a preparation method thereof. The alloy comprises the following components in percentage by weight: 2.0-3.2 percent of Cu, less than or equal to 0.2 percent of Mn, 0.2-0.5 percent of Mg, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Ni, less than or equal to 0.1 percent of Zn, less than or equal to 0.15 percent of Ti, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Fe, and the balance of Al and inevitable trace impurities, wherein the carbonitride MX(C,N)Y is 0.05-2.5 percent of total mass of the furnace burden. The aluminum alloy has the characteristics of high strength and good casting performance.

The invention relates to a minimum quantity lubrication supply system capable of automatically regulating the oil mist quantity for machine tool processing. The minimum quantity lubrication supply system comprises a gas conveying switch, at least one electromagnetic switch, a one-way valve, a flow rate control valve and an atomizing chamber, wherein the atomizing chamber contains cutting oil, the inner side wall of the top of the atomizing chamber is provided with at least two Venturi atomizing spray heads, the gas conveying switch is sequentially connected with one Venturi atomizing spray head through a gas conveying pipe, the gas conveying switch and the at least one electromagnetic valve are respectively and sequentially connected with the at least one Venturi atomizing spray head through a gas conveying pipe, the one-way valve and the flow rate control valve are sequentially connected through an oil liquid conveying pipeline, the bottom of the oil liquid conveying pipeline is communicated with the bottom of the atomizing chamber, the top of the flow rate control valve is connected with the at least two Venturi atomizing spray heads through an oil liquid conveying pipeline, and a baffle plate is fixedly arranged in the atomizing chamber. The minimum quantity lubrication supply system has the advantages that the structure is simple, the oil mist spraying quantity at the outlet part can be automatically regulated, and in addition, the oil mist can be simultaneously used for a plurality of machine tools.

The invention provides an emergency material management system based on the internet of things technology, and discloses an internet of things device and management system used for emergency material management. According to the emergency material management system based on the internet of things technology, the internet of things technology is combined with emergency material management, and the internet of things device, management system and method suitable for emergency material management and achieving self-adaptation control are established on the basis of existing emergency material management. According to the system and method, intelligent management for an emergency material storehouse is achieved, labor cost and the risk of insufficient emergency material supplying are reduced, the stock number can be timely updated when emergency materials are delivered from a storage, management staff can timely supplement shortage materials, accuracy and timeliness of storehouse stocktake are strengthened, and response capacity of enterprises for emergency events is improved.

The invention discloses a project management method, device and system, which is applied to a mobile terminal in a project progress management system under an engineering management mode EPC. The project progress management system comprises a server and at least one mobile terminal. The mobile terminal is wirelessly connected with the server. The mobile terminal is used for inputting design management information, construction management information and material management information, so as to realize online management. A series of shortcomings of serious paper waste, low management efficiency, management information access lag and the like of old methods, which are caused by the behindhand offline management method of paper report management of project management methods, are ended. The progress can be well reflected to management staff in real time. Fine and multi-dimensional project progress management is realized.

The invention discloses a process for machining a retaining ring forged piece of a wind driven generator. The process comprises the following steps of: selecting 1Mn18Cr18N steel as a raw material for producing the retaining ring forged piece; smelting in an electric furnace, remelting electroslag, and forming a steel ingot; forging (upsetting, drawing out, punching, chambering and flattening), performing solution heat treatment, performing cold expansion, inspecting mechanical performance and performing finish machining to prepare a finished product. Due to the adoption of the new material and the new process, the tensile strength of the retaining ring forged piece is improved from 895 to over 1,035, the yield strength is improved from 760 to over 900, the quality of the product is more stable, and the service life is prolonged. In addition, the retaining ring forged piece is forged by using a multi-directional forging mechanism in a forging process and metal can flow reasonably in the pressed state by the forging mechanism in the forging process, so the forged piece is refined, and the finished product ratio of the forged piece is improved.

The invention discloses a preparation method of a graphene / Fe3O4 / polyaniline ternary wave-absorbing composite material, and relates to the technical field of ternary composite conductive material production. The method is characterized in that a process using aniline monomer to directly reduce graphene oxide is used, and the coordination interaction of the graphene oxide and Fe3O4 is used to prepare the graphene / Fe3O4 / polyaniline ternary composite material, so that the goal of greenization of the nano composite material preparation and compounding and refinement of the wave-absorbing material structure can be realized. In the composite material, polyaniline organically wraps the surface of the compound of Fe3O4 and graphene to form a specific layer-by-layer assembled structure. The specific surface area is greatly increased by the laminated graphene sheets, and more interfacial polarization and interfaces are caused by the layered structure and the core-shell structure. The prepared ternary composite material is capable of realizing impedance matching and is beneficial to the attenuation effect of electromagnetic waves by the additional interfacial polarization and multiple interfaces caused by the layer-by-layer assembled structure.

The invention discloses a field construction material intelligent management method based on BIM. A system according to the method comprises a construction field material information unit, a monitoring unit, a BIM standard data unit, an enterprise server and an intelligent terminal. The construction field material information unit comprises a field entering material information acquisition moduleand a planned material module. The field entering material information acquisition module uploads the actual number and the actual quality information of the material which enters the construction field to the enterprise server. The planned material module uploads the planned number and the planned quality which are required by the construction field to the enterprise server. According to the field construction material intelligent management method, BIM technology is combined with other technology, construction engineering management factors such as information acquisition, information transmission and information processing, engineering factor management system, monitoring identification system, automatic counting system, Internet technology and Internet-of-things technology are combined. Finally accurate, in-time and reasonable purchasing, field entering and management of main materials are finally realized. Furthermore dynamic adjustment is performed according to the actual requirement, thereby realizing refinement of main materials of the project.

The invention discloses a method and a device for optimizing machine room energy consumption efficiency on the basis of artificial intelligence, belongs to the field of environment protection and energy saving, and solves the problems of high energy consumption and environment protection caused by the excessive refrigeration of an existing IDC (Internet Data Center) machine room and serious electric power waste. The device comprises a perception device, an automatic learning device, a control logic device and a control device, wherein the perception device obtains machine cabinet heating / refrigeration state big data; the automatic learning device automatically learns a control strategy from the heating / refrigeration state big data; the control logic device uses the control strategy to generate an optimal control instruction; and the control device directly regulates the operation of refrigeration equipment. The invention contains the automatic learning device which can be combined with an artificial intelligence algorithm to automatically learn an optimal control strategy on the basis of cabinet operation big data, and electric quantity consumption is lowered. The invention contains a control logic device which can dynamically and accurately regulate the operation of the refrigeration equipment according to machine room operation data.

The invention belongs to the technical field of metallurgy and particularly relates to low-temperature-resistant hot-rolled channel steel for marine engineering and a manufacturing method thereof. The low-temperature-resistant hot-rolled channel steel for marine engineering comprises the following chemical components in percentage by weight: 0.06%-0.10% of C; 0-0.4% of Si; 0.9%-1.6% of Mn; 0.02%-0.08% of V; 0-0.02% of P; 0-0.01% of S; 0-0.015% of N; 0.02%-0.05% of Al; 0-0.004% of O; and the balance Fe and inevitable impurities. The channel steel for marine engineering, provided by the invention, has favorable mechanical properties, the yield strength of the channel steel is greater than or equal to 355 MPa, the tensile strength of the channel steel is greater than or equal to 470 MPs, and especially, the longitudinal impact energy of the channel steel is greater than or equal to 34 J at minus 50 DEG C. Therefore, the channel steel is applicable to extremely cold areas.

The invention provides power transmission and transformation project schedule management system and method for a power system. The power transmission and transformation project schedule management system for a power system comprises a schedule item management unit, a loop management unit, a pole tower management unit, a section dividing management unit, a plan compiling unit, a schedule filling and reporting unit and a schedule calculating unit, wherein the schedule item management unit is used for organizing and storing the item attribute information of a power transmission and transformation project schedule; the loop management unit is used for storing the loop attribute information of a power transmission line; the pole tower management unit is used for organizing and maintaining power transmission line pole tower attribute information and the relation information of a loop; the section dividing management unit is used for storing a line erecting section and attribute information thereof of a power transmission line project; the plan compiling unit is used for automatically finishing the compilation of a project plan according to the project scale and the voltage grade; the schedule filling and reporting unit is used for filling and reporting the plan and practical information of the schedule as well as result information thereof; and the schedule calculating unit is used for providing querying, collecting and calculating services for the plan information, practical finishing information and successful information of the schedule. The invention can realize refined and multi-dimensional management on the power transmission and transformation project schedule.

The invention relates to an auxiliary electric pile simulation device for fuel cell power generation system testing. The auxiliary electric pile simulation device comprises a cathode simulation module, an anode simulation module and a cooling simulation module. The cooling simulation module comprises a cooling water inlet, a cooling water pipeline and a cooling water outlet which are sequentiallyconnected. A first heater and a first regulating valve are arranged on the cooling water pipeline. The anode simulation module comprises an anode gas inlet, an anode gas pipeline, an exhaust port andan anode gas outlet. The anode gas pipeline is a three-way pipe, wherein one end is connected with the anode gas inlet, and the other two ends are respectively connected with the exhaust port and theanode gas outlet. Compared with the devices in the prior art, the physical state change of the electric pile in the power generation process can be simulated instead of the electric pile and the fuelconsumption simulation, and the electric pile flow resistance simulation and the gas humidity simulation in the electric pile can be realized so that the system testing is accurate and reliable, and meets the actual working state.

The invention relates to an improved preparation technology of white mud calcium carbonate for a papermaking filler. The improved preparation technology comprises the following steps of: firstly, pretreating a turbid green liquor from a combustion section by using fine milk of lime, and then adding causticized milk of lime for causticization to obtain an alkali recovery white mud suspension liquid; introducing the white mud suspension liquid into a white mud pre-coating machine or a vacuum pulp washer for separating white mud and white liquor, washing the white mud, and then sieving to remove large granular coarse residues; introducing industrial liquid CO2 into the washed and coarsely sieved white mud suspension liquid for carrying out deflocculation and secondary carbonization; and finally adding a decolorizer for reaction, and sieving to obtain the white mud calcium carbonate. The improved preparation technology has the advantages that the fine milk of lime is used for pretreating the green liquor and enabling solid matters in the green liquor to be cooperatively precipitated in a precipitation generation process, so that the impact of the solid matters on the whiteness of the white mud is eliminated; and colored matters formed by non-ferrous metal ions introduced by the causticized milk of lime are reserved in the causticized white mud, and the causticized white mud is bleached to remove the color after secondary carbonization, so that the whiteness of the white mud is increased, and the refining of the white mud calcium carbonate for the papermaking filler is realized.

The invention provides a time-varying OFDM system channel estimation method based on deep learning. The system randomly generates a sending data signal bit stream; forming a sending frame with a training symbol; carrying out binary phase shift keying modulation; performing inverse fast Fourier transform; adding a cyclic prefix to overcome inter-symbol interference, carrying out serial-to-parallelconversion, obtaining a received signal through a fast time-varying OFDM channel and noise addition, constructing and training a CPR-Net model, generating more accurate Doppler frequency shift, and after channel reconstruction response is carried out, recovering a received signal bit stream through signal detection. According to the invention, the deep learning method is introduced into the fast time-varying OFDM system, and the channel estimation and signal detection performance in the fast time-varying OFDM system is improved by using the deep neural network, so that the channel parameter estimation precision and the overall bit error rate performance of the system are improved.

The invention relates to a distributed video encoding method based on motion compensation refinement, which comprises the following steps of: (1) dividing a video sequence into a key frame and a WZ (working zone) frame at an encoding end, and then carrying out DCT (discrete cosine transform), quantization and Turbo encoding on the WZ frame; and (2) at a decoding end, adopting H.264 intra-frame decoding for the key frame, generating a forward motion compensation image and a backward motion compensation image by using an improved three-dimensional recurrent motion searching method, and then generating a side information decoding WZ frame by adopting a motion compensation interpolation method. The method has a reasonable design; by adopting the improved three-dimensional recurrent motion searching method (3DRS), the quality of side information (SI) can be effectively improved; simultaneously, the refinement of the SI is achieved by adopting a space-time boundary matching algorithm (STBMA); the more precise motion vector is obtained by adequately utilizing the smoothness of space and time; and the method has better rate distortion performance.