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88results about How to "Avoid high demands" patented technology

Rapid forming method of lithium ion power battery

The invention discloses a rapid forming method of a lithium ion power battery, which is characterized by comprising the following steps of: 1. precharging; 2. settling and aging; and 3. charging by adopting an intermittent depolarized single-stage impulse charging mode until charge is finished. Because the forming process of the invention adopts the intermittent depolarized single-stage impulse charging mode, the impedance of an SEI (Solid Electrolyte Interface) membrane is lowered, thereby reducing the internal resistance of the battery and improving the rate discharge performance of the lithium ion power battery. Because the forming process of the invention adopts an impulse current with a lower frequency, the battery can be naturally depolarized within the impulse-off time, thereby lowering the polarizing effect, stabilizing the charging voltage, improving the charging efficiency, simultaneously avoiding the high requirement brought by a high frequency impulse current charging mode for equipment, improving the utilization efficiency of electric energy and greatly lowering the production cost. The step of precharge is adopted to facilitate the formation of the stable SEI membrane, thereby improving the performance of the battery.
Owner:SKY ENERGY LUOYANG

Method and device for achieving all-optical nonlinear activation function of optical neural network

The invention discloses a method and a device for achieving an all-optical nonlinear activation function of an optical neural network. The method comprises the following steps: acquiring a to-be-processed signal optical signal and a reference optical signal coherent with the to-be-processed signal optical signal; inputting the to-be-processed signal optical signal and the reference optical signalinto a first phase shift module, wherein the first phase shift module performs phase shift operation on the to-be-processed signal optical signal and the reference optical signal to obtain an opticalsignal of a first array; and inputting the optical signal of the first array into an optical interference module, performing nonlinear operation on the optical signal of the first array in the opticalinterference module to obtain an optical signal of a second array, and outputting the optical signal of the second array as a nonlinear response of the signal optical signal to be processed. According to the technical scheme, the problem that an existing optical nonlinear function calculation unit has high requirements for optical power and a transimpedance amplifier is solved, parameters are adjustable, and a provided nonlinear function is flexible and controllable.
Owner:UNITED MICROELECTRONICS CENT CO LTD

Method for preparing lithium-replenishing material Li2NiO2, and lithium ion capacitor using Li2NiO2

The present invention discloses a method for preparing a lithium-replenishing material Li2NiO2, and a lithium ion capacitor using Li2NiO2. Li2O and NiO are used as raw materials, and are sintered at ahigh temperature after being ball milled in a protective atmosphere; then, Al2O3 is added to continue ball milling in the protective atmosphere and then sintered at a high temperature to obtain a target Li2NiO2. The lithium ion capacitor comprises a positive electrode, a negative electrode, a separation membrane and an electrolyte; the positive electrode comprises a positive electrode current collector, and a positive electrode material, a conductive agent and a binding material, which are dissolved in a solvent and coated on the positive electrode current collector; the negative electrode comprises a negative electrode current collector, and a negative electrode material, a conductive agent and a binding material, which are dissolved in the solvent and coated on the negative electrode material; the positive electrode material comprises a first positive electrode material and a second positive electrode material; the first positive electrode material is one of a carbon nanotube, graphene, active carbon, and nanogate carbon; and the material of the second positive electrode is Li2NiO2. The negative electrode can be pre-embedded with lithium by first charge and discharge.
Owner:浙江微创新能源有限公司

Method for preparing monocrystal metal foil

The invention relates to a method for preparing monocrystal metal foil. The method comprises the following steps: (1) placing polycrystal metal foil with a purity of 99.9 wt% or above basically vertically in a heating device, carrying out heating to a temperature which is 10-100 DEG C below the melting point under a vacuum or a protective atmosphere for annealing treatment; and (2) carrying out cooling so as to prepare the monocrystal metal foil. The method provided by the invention is high in universality, can be used for various metal material systems, and can be used to prepare large-area monocrystal metal foil simply and efficiently. Meanwhile, cost is low, energy consumption is low, and the prepared monocrystal metal foil is high in quality and uniform in morphology.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI

Nitrogen-doped carbon material encapsulated cobalt catalyst and method of using the catalyst to prepare secondary amine compounds

The present invention discloses a nitrogen-doped carbon material encapsulated cobalt catalyst and a method of using the catalyst to prepare secondary amine compounds. The preparation method of the catalyst comprises the following steps: 1) silica sol is added into a 2-methylimidazole solution and dispersed uniformly to obtain liquid sol, a stirring is conducted while adding cobalt nitrate liquid into the liquid sol, a stirring reaction is conducted for 3-10 h, and after the reaction is completed, centrifuging, filtering, washing and drying are conducted to obtain ZIF-67@SiO<2> materials; 2) under nitrogen protection, the ZIF-67@SiO<2> materials are calcined at 400-1,200 DEG C for 6-10 h, the calcined materials are soaked with hydrofluoric acid solution, the soaked calcined materials are water washed to neutral, the washed calcined materials are dried to obtain CN@Co materials. The method of using the catalyst to prepare the secondary amine compounds is as follows: in an organic solvent, nitro-compounds, formic acids, carbonyl compounds and the CN@Co materials are added, nitrogen is ventilated to replace oxygen in the reaction system, and the reaction is conducted at 90-220 DEG C for 15-18 hours in an air isolation condition to obtain the secondary amine compounds. The catalyst can be used in the preparation of the secondary amine compounds, reduces the requirements and costs of the reaction to devices and is relatively high in reaction selectivity and yield.
Owner:SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES

Fish mitochondria genome-wide DNA amplification

The invention provides fish mitochondria genome-wide DNA amplification. The invention firstly provides a primer pair for fish mitochondria genome-wide DNA amplification. The invention further provides a method for fish mitochondria genome-wide DNA amplification based on the primer combination. By the adoption of the amplification method, clone products of various fish mitochondria genomes can be obtained successfully. In addition, a primer pair obtained through designing and screening has the excellent characteristics that the amplification performance is high and the number of by-products generated is small.
Owner:CHINESE ACAD OF FISHERY SCI

Relaxation spectrum analysis method and analysis system for simulated magnetic resonance imaging based on numerical simulation technology

The invention brings forward a relaxation spectrum analysis method and analysis system thereof for simulated magnetic resonance imaging based on numerical simulation technology. The method comprises the following steps: building a simulated sample information model; building relaxation device hardware parameters; building a measurement sequence physical model; integrating the simulated sample information model, relaxation analysis related hardware parameters and the measurement sequence physical model created in the above step in order to set up a math-physical model for magnetic resonance imaging relaxation data acquisition, simulate data acquisition algorithms and realize programs and finish simulated acquisition of original data; and performing relaxation spectrum inversion on the dataacquired by the above step in order to obtain a distribution diagram of relaxation time. The relaxation spectrum analysis system for simulated magnetic resonance imaging based on numerical simulationtechnology cannot only be extensively applied to a supporting virtual experimental training platform using magnetic-resonance imaging relaxation spectrum application technology but also be applied toself-cleaning technology principles for application personnel in the technical field of related relaxation spectrum analysis. The system can also be used for instrument development and test calibration, spectrum references of sample tests, data sources for inversion study of relaxation spectrums and the like.
Owner:EAST CHINA NORMAL UNIVERSITY

Carbonyl conjugated heterocyclic compound and preparation and application

The invention belongs to the field of lithium ion battery materials, and discloses a carbonyl conjugated heterocyclic compound and preparation and application. The carbonyl conjugated heterocyclic compound is N,N'-diphenyl-1,4,5,8-naphthalimide, and has a structural formula shown as a formula (I). A preparation method comprises the following steps: dissolving 1,4,5,8-naphthalenetetracarboxylic dianhydride in a solvent, stirring to mix uniformly, dropwise adding phenylamine and trithylamine, stirring and performing a refluxing reaction until brown precipitate is generated; separating and washing the precipitate, recrystallizing, washing and drying in vacuum to obtain a product. In the preparation method, a product is prepared through a one-pot reaction, and a synthetic method is simple and feasible, is low in cost, has high yield, saves energy and is environment-friendly. The prepared N,N'-diphenyl-1,4,5,8-naphthalimide has high discharging capacity, high cycling stability and high rate performance after thermal treatment, and is a promising positive electrode material for a lithium ion battery. The formula (I) is shown in the description.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Preparation method of silicon-dioxide-coated sulfur microcapsules

The invention discloses a preparation method of coated sulfur. By using synthetic sulfur as a core and an inorganic high-polymer material as a film material, the coated sulfur microcapsules are prepared by in-situ modification. Coated sulfur with different film thicknesses and different surface shapes is prepared. The product can be uniformly dispersed during rubber compounding. The compounded rubber can not have the phenomenon of blooming in the parking stage, and can release sulfur at proper speed at curing temperature to participate in crosslinking. The microcapsules have the advantages of simple preparation technique and lower cost, and are a novel vulcanizing agent which is worthy of development.
Owner:QINGDAO UNIV OF SCI & TECH

Numerical simulation-based X-CT virtual data acquisition and image reconstruction method and system

The invention provides a numerical simulation-based X-CT virtual data acquisition and image reconstruction method and system; the method comprises the following steps: forming sample information models according to different purposes; building an X-CT equipment hardware parameter model; building physics models and mathematics models via different data acquisition methods; building a CT equipment original data acquisition physics model and a mathematics model, and finishing simulation and acquisition of the original data; using the original data for image reconstruction. The invention further comprises the step of building an artifact data model. The simulation and analysis method and system can combine the virtual digital human technology with the virtual CT technology without using expensive and huge hardware equipment, thus preventing radiation damages; the method and system can be widely applied to large-scale expensive equipment and high and new technology correlation teaching training aspects.
Owner:EAST CHINA NORMAL UNIV

The steel-tube grouting quick-stabilizing column structure and construction method

The present invention relates to the field of stabilization with the aid of reinforced-concrete column structures, in particular to a steel-tube grouting quick-stabilization column structure and construction method. The cross-section of steel-tube grouting quick-stabilization column structure may be either round or square. A round-section steel-tube grouting quick-stabilizing column structure comprises two outer-casing semi-round steel tubes and ring-type restriction stirrups, and a square-section steel-tube grouting quick-stabilizing column structure comprises two outer-casing semi-round steel tubes and square restriction stirrups. The two outer casing steel tubes adopted by the present invention can double as formwork so as to avoid field formwork construction. The construction techniques only require installing and securing the semi-steel tubes on the field and injecting the high-strength grouting material, so the operating process is quite simple. Welding the two semi-steel tubes after the grouting material is injected can avoid the partial buckling of steel-tube wall caused by welding operation and the high requirements for skilled welders; therefore, it is quite simple and easy to implement the stabilization technique.
Owner:浙江书韬建设有限公司

600 MPa-level high-strength low-alloy cold-strip steel and production method thereof

The invention discloses 600 MPa-level high-strength low-alloy cold-strip steel and a production method thereof. The cold-strip steel comprises the chemical components: 0.08%-0.11% of C, 0.4%-0.5% of Si, 1.65%-1.75% of Mn, 0.015% or less of P, 0.012% or less of S, 0.02%-0.045% of Als, 0.005% or less of N, 0.02%-0.03% of Ti, 0.03%-0.04% of Nb and the balance Fe, the hot rolling heating temperature ranges from 1,230 DEG C to 1,270 DEG C, the final rolling temperature ranges from 876 DEG C to 904 DEG C, the coiling temperature ranges from 633 DEG C to 667 DEG C, the continuous annealing soaking temperature ranges from 740 DEG C to 760 DEG C, the slow-cooling temperature ranges from 660 DEG C to 680 DEG C, the rapid cooling temperature ranges from 450 DEG C to 470 DEG C, and the elongation of temper rolling ranges from 1.2% to 1.4%. According to the 600 MPa-level high-strength low-alloy cold-strip steel, by utilizing Nb and Ti element precipitation strengthening and Si element solution strengthening, component precise control is achieved, the technical parameters are improved, the cost is reduced, and the product obdurability is improved.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY

Preparation method of 3-cyclopropylmethoxy-4-difluoromethoxy-benzoic acid

The invention provides a preparation method of 3-cyclopropylmethoxy-4-difluoromethoxy-benzoic acid shown in the formula I. The preparation method comprises the following step that 3-halogeno-4-hydroxybenzaldehyde shown in the formula II and cyclopropylmethanol undergo a reaction in the presence of one or more alkalis to produce a compound shown in the formula III; the compound shown in the formula III and chlorodifluoroacetic acid or its derivative shown in the formula IV undergo a reaction in the presence of one or more alkalis to produce 3-cyclopropylmethoxy-4-difluoromethoxy-benzaldehyde; and the 3-cyclopropylmethoxy-4-difluoromethoxy-benzaldehyde further undergoes an oxidation reaction to produce 3-cyclopropylmethoxy-4-difluoromethoxy-benzoic acid shown in the formula I. The preparation method has good reaction selectivity and a high reaction yield, adopts reagents having low costs, allows mild reaction conditions, and has safe and controllable processes. In the whole reaction process, highly toxic reagents and solvents are not used and thus the preparation method satisfies environmental protection requirements and is very suitable for industrial production.
Owner:SHANGHAI TONGYUAN BIOTECH

Brazing filler alloy powder and preparation method thereof

The invention discloses brazing filler alloy powder and belongs to the technical field of cathode high-temperature brazing filler powder and a preparation method of the brazing filler alloy powder. The brazing filler alloy powder comprises, by mass, 49.0%-56.0% of molybdenum, 39.0%-46.0% of ruthenium and 2.0%-5.0% of boron. The preparation method of the brazing filler alloy powder comprises the following steps: conducting hydrogen burning and impurity processing on the high-purity and hyperfine molybdenum powder, ruthenium powder and boron powder and conducting dosing, powder mixing and granulating in proportion; manufacturing a preformed bar through cold isostatic pressing, and dewaxing and sintering under the condition of hydrogen atmosphere protection; purifying the sintered preformed bar by means of electron beam melting; and processing powder through a plasma rotating electrode atomization process under the condition of high-purity inert gas protection, smashing coarse powder and achieving refining of the powder. The brazing filler alloy powder prepared through the preparation method has the advantages of being small in particle and uniform in particle size, and therefore the problems that the existing brazing filler is high in welding temperature, uneven in composition, large in solid-liquid phase line temperature difference, poor in using manufacturability and the like are solved.
Owner:GRIMAT ENG INST CO LTD

Numerical simulation technology based simulated nuclear magnetic resonance spectrum analysis method and analysis system

The invention discloses a numerical simulation technology based simulated nuclear magnetic resonance spectrum analysis method and analysis system. The method includes building a simulated sample molecular information model and a simulated sample molecular information base; building spectrometer hardware parameters; building a spectral sequence physical model; building a nuclear magnetic resonancespectrum original data acquisition physical mathematics model based on the simulated sample molecular information model and the simulated sample molecular information base, the spectrometer related hardware parameters and the spectral sequence physical model, and performing a simulated original data acquisition algorithm and program realization to finish the simulation acquisition of original data; and obtaining a spectrogram by subjecting the collected original data through simulation to Fourier transformation. The method and system can be applied to multiple aspects such as virtual experiment training platforms matching nuclear magnetic resonance spectrum application technologies and the self-learning of application personnel in the related technical fields, and have wide application prospects.
Owner:EAST CHINA NORMAL UNIVERSITY

Optical fiber interferometer sensor disturbance signal demodulation device based on single sideband frequency modulation

The invention discloses an optical fiber interferometer sensor disturbance signal demodulation device based on single sideband frequency modulation. The optical fiber interferometer sensor disturbancesignal demodulation device based on the single sideband frequency modulation comprises a laser, a modulator, a frequency modulation source, an optical filter, an optical amplifier, an optical isolator, a Michelson interferometer, a PZT, a photodetector and a data sampling card. The optical fiber interferometer sensor disturbance signal demodulation device based on the single sideband frequency modulation disclosed by the invention introduces a microwave frequency modulation source and uses a frequency sweeping method, so as to avoid high requirements of the traditional internal modulation PGCmethod for a direct modulation laser source and reduce a relative intensity noise; and the invention adopts a 12-point quadrature demodulation algorithm to avoid additional electrical noise caused bythe use of an electric mixer, therefore, the measurement dynamic range is large and fully automatic measurement can be realized, the demodulation algorithm is simplified, and the cost is reduced; meanwhile, the system disclosed by the invention can effectively detect array sensors of any distribution, so that the applicability of the system is stronger.
Owner:ZHEJIANG UNIV

Low-temperature rapid preparing method for high-density nanocrystalline tungsten copper base block composite materials

The invention discloses a low-temperature rapid preparing method for high-density nanocrystalline tungsten copper base block composite materials, and belongs to the technical field of refractory metaland powder metallurgy. Tungsten powder, zirconium carbide, chromium and copper are adopted as raw materials to be subjected to ball milling, the combined action of grain boundary element segregationand nanometer dispersion particles is utilized, a discharge plasma rapid sintering method is combined, rapid solid phase sintering densifying is achieved under the conditions of low temperature and high pressure, and a series of adjustable Cu content tungsten copper base block composite materials with the density being 95% or above and the average grain size being 100 nm or below are successfullyprepared. The low-temperature rapid preparing method solves the contradictory problem about material compactness and grain size growth in the sintering process, and the problem exists in the refractory metal and nonferrous alloy field over the years.
Owner:BEIJING UNIV OF TECH

Preparation process suitable for metallization by bonding copper on aluminium oxide ceramic surface

ActiveCN105367128AAvoid secondary chemistryAvoid Laser EtchingScreen printingLaser etching
The present invention discloses a preparation process suitable for metallization by bonding copper on an aluminium oxide ceramic surface. The preparation process comprises the following specific steps: paste preparing, screen printing, sintering, and secondary sintering. By using the above method, and according to the preparation process suitable for metallization by bonding copper on the aluminium oxide ceramic surface provided by the present invention, two kinds of bonding copper processes in the prior art are combined, and a ceramic bonding copper method that is similar to the thick film process and low in cost is developed; a required line diagram on the ceramic part surface is printed in a manner of thick film printing; then a copper layer is obtained by air sintering and hydrogen reduction; the property of the obtained copper layer is similar to the property of that prepared by the DBC process, and the bonding strength is higher than the bonding strength of that prepared by the conventional copper thick film method; and the high requirement on a device by the DBC process and secondary chemical etching or laser etching of a copper-clad plate are avoided.
Owner:CHANGSHU CITY YINYANG CERAMIC CO LTD

Manufacturing method of salt packing paper

The invention discloses a manufacturing method of salt packing paper, which comprises the steps of firstly, mixing coniferous wood chips with broadleaved wood chips, then performing pulping, adoptinga conical grinder grinding process, adding auxiliary materials, manufacturing wet paper sheets with pulp, and performing prior-drying, surface glue application, post-drying and calendaring decoration.Provided by the invention is a manufacturing method of salt packing paper which is good in strength, high in breaking resistance and good in moisture-proof performance. Meanwhile, the salt packing paper has the advantages of rapid degradation and ability of meeting environmental protection requirements and health requirements for food packing paper.
Owner:YUEYANG FOREST & PAPER CO LTD

Treatment method of waste colloidal emulsion explosive in porous ammonium nitrate fuel oil explosive

InactiveCN103319289AAvoid safety and quality hazardsAchieve reuseExplosivesSocial benefitsEmulsion explosive
The invention provides a treatment method of a waste colloidal emulsion explosive in a porous ammonium nitrate fuel oil explosive. Namely, the waste colloidal emulsion explosive is pre-treated to be mixed with porous ammonium nitrate or porous ammonium nitrate mixed with a certain amount of oil phase according to a certain ratio; corresponding technical parameters are adjusted according to technical requirements of a product so as to prepare the qualified porous ammonium nitrate fuel oil explosive, wherein a pre-treated waste colloidal emulsion explosive mixed solution accounts for 20.0-40.0% of the total weight of an explosive finished product, and the porous ammonium nitrate or porous ammonium nitrate mixed with the certain amount of oil phase accounts for 60.0-80.0% of the total weight of the explosive finished product. Compared with existing other treatment methods, the treatment method disclosed by the invention is simple in production process technology, and stable and reliable in product quality and has economical and environment-friendly effects; potential quality hazards and potential safety hazards which are generated by online addition of the waste colloidal emulsion explosive, as well as raw material waste and environment pollution which are caused by destroying and treating the waste colloidal emulsion explosive are avoided; the recycling and the reutilization of the waste colloidal emulsion explosive are realized, and the treatment method has more obvious economic benefits and social benefits.
Owner:SICHUAN YAHUA IND GRP

Tin sulfide-titanium dioxide compound and preparation method and application thereof

The invention belongs to the field of a lithium ion battery material, and discloses a tin sulfide-titanium dioxide compound and a preparation method and an application thereof. The preparation methodcomprises the steps of enabling nanometer TiO<2>, SnCl<4>.5H<2>O and CH<3>CSNH<2> to be dispersed in a solvent, and performing stirring and mixing uniformly to obtain a turbid liquid; next, transferring the turbid liquid to a hydrothermal reaction kettle, heating to 140-180 DEG C and performing thermal insulation and carrying out a reaction for 10-20h, and then performing natural cooling; and filtering the reaction liquid, collecting precipitates, and performing washing and drying to obtain the tin sulfide-titanium dioxide compound. The product is prepared by adopting a hydrothermal method through a one-step reaction, and the synthesis method is simple and easy to implement, low in cost, high in yield and energy saving and environment friendly; and the prepared tin sulfide-titanium dioxidecompound has high discharge capacity, high cycle stability and rate capability, and is a relatively promising negative electrode material of the lithium ion battery.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Novel cathode high-temperature brazing material and preparation method thereof

The invention relates to a novel cathode high-temperature brazing material and a preparation method thereof, in particular to Ru-B-C alloy component brazing powder and a manufacturing method thereof. The brazing material mainly comprises Ru-B-C alloy powder, in weight percent, 89.0-97.5wt% of Ru, 2.0-10.0wt% of B and 0.5-3.0wt% of C, and the elementary substance content of the Ru, the B and the C is lower than 2wt%. The brazing material is prepared by the aid of an electron beam smelting purification-plasma rotating electrode atomization powder manufacturing-airflow grinding crushing method. Prepared brazing powder particles are fine and uniform in granularity and composition, so that the problems of high welding temperature, composition segregation, large solid-liquid phase line temperature difference, poor welding process and the like of an existing brazing material can be solved.
Owner:GRIMAT ENG INST CO LTD

Three-dimensional human body posture estimation method based on monocular camera

InactiveCN108648203AAvoid high demandsSuitable for a wide range of sizesImage enhancementImage analysisHuman bodyModel method
The invention belongs to the technical field of computer vision, and discloses a three-dimensional human body posture estimation method based on a monocular camera. The method comprises the followingsteps that 1, a three-dimensional human body model is built on the basis of standard proportion data of a normal human body, and a two-dimensional projection of the three-dimensional human body modelis acquired on the basis of a weak perspective projection method; 2, a video of the human body in motion is acquired by means of the monocular camera, and the two-dimensional contour feature of each human body image frame of the video is extracted; and 3, the two-dimensional contour feature of each human body image frame is compared with the two-dimensional projection of the three-dimensional human body model, cost functions are established, and an optimal solution of the cost functions is calculated, so that the most matched three-dimensional model is obtained. According to the method, the defect of the high requirement of a general generative model method on model generation is overcome, and the method can be widely applied to posture and size estimation on human body objects in different postures and different shapes and has the advantages of being high in adaptability and robustness.
Owner:SHANGHAI UNIV OF ENG SCI

Anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof

The invention belongs to the technical field of sodium-ion battery materials and discloses an anthraquinone dihydroxy sodium salt-graphene compound and preparation and application thereof. The preparation method comprises the following steps: adding 1,5-dioxyanthraquinone into a solvent, performing uniform agitation and dissolution, then dripping a NaOH solution, enabling a reflux agitation reaction to obtain 1,5-dioxyanthraquinone disodium, grinding 1,5-dioxyanthraquinone disodium, dispersing ground 1,5-dioxyanthraquinone disodium and graphene into the solvent, placing the mixture into a ballmilling tank, and performing ball milling to obtain a turbid liquid; and performing ultrasonic treatment on the turbid liquid, and performing vacuum drying and precipitation to obtain a 1,5-dioxyanthraquinone disodium-graphene compound. The preparation method is simple and feasible, low in cost and high in yield, saves energy and protects the environment; and the obtained compound has high discharge capacity and favorable cyclic stability and rate capability than simple 1,5-dioxyanthraquinone disodium, and can be applied to a lithium-ion battery cathode material.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Doppler frequency shift simulation method and device based on general medium frequency transceiver

The invention discloses a doppler frequency shift simulation method and device based on a general medium frequency transceiver. The method comprises the steps that A, an audio generation collector acquires a radar mode; B, frequency shift amount is calculated through preset speed and the radar mode; C, the reference frequency of a doppler radar is received and filtering is carried out after down conversion; D, up conversion is carried out on a filtered signal, so as to generate a signal after frequency shift; and E, the signal is sent to the doppler radar and is compared with a reference signal. According to the invention, based on the medium frequency transceiver in the existing general PXI modular instrument, the total frequency shift amount is calculated through the acquired radar mode and the preset speed; up and down conversion and digital filtering are carried out on the signal to simulate doppler frequency shift; a high requirement on a special hardware circuit in the traditional technology is solved; the precision and the portability are improved; the repair time and the cost are reduced; and the doppler frequency shift simulation method and device based on the general medium frequency transceiver can be widely applied to the technical field of aviation.
Owner:GUANGZHOU HANGXIN AVIATION TECH CO LTD

Method for separating dynamic image from mixed light

The invention discloses a method for separating a dynamic image from mixed light. According to the method, an RGB (Red, Blue, Green) three-color light source is adopted for sequentially irradiating a moving target in primary exposure time, and a moving image is obtained; the moving image is separated to obtain corresponding red main body images, blue main body images and green main body images; and the separation step comprises the processes that: the moving image is converted from an RGB color space to an HSV (Hue, Saturation, Value) color space, and an H component is used for separating out a red region and a green region; the RGB color space is converted into a CIE L*a*b* color space, and a b* component is used for obtaining a blue region; and a plurality of images shot at the same time intervals are respectively subjected to image segmentation, and corresponding red, green and blue main body pictures of the images are connected into the dynamic image. Therefore, the frame number can be exponentially increased, and finally, the dynamic image is formed. The defect of high requirement on hardware is overcome in a software mode. The method provided by the invention has the advantages that the operation is simple; the practicability is high; and the precision is high.
Owner:SOUTH CHINA UNIV OF TECH

Lithium terephthalate-graphene compound as well as preparation and application thereof

ActiveCN106328901AEasy to prepareAvoid processing steps and high demands on equipmentCell electrodesSecondary cellsCvd grapheneSolvent
The invention belongs to the field of lithium ion battery materials and discloses a lithium terephthalate-graphene compound as well as preparation and application thereof. The preparation method comprises the following steps: adding terephthalic acid into a solvent, stirring and dissolving uniformly, then dropwise adding LiOH solution, refluxing, stirring and reacting, removing the solvent after reaction is finished, and cleaning and drying a product to obtain lithium terephthalate; dispersing lithium terephthalate and graphene into a solvent together, stirring and mixing uniformly, then carrying out ultrasonic treatment to obtain dirty solution, then heating the dirty solution to 400-500 DEG C in inert atmosphere, and carrying out heat treatment for 4-6 hours, so that the lithium terephthalate-graphene compound is obtained. The prepared product has a compound characteristic structure that a box structure of lithium terephthalate is taken as a matrix and flake graphene is uniformly embedded into the matrix and has excellent electrochemical properties when serving as a lithium ion battery anode material.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Large-screen naked-eye 3D all-in-one machine structure and preparation method thereof

The invention discloses a large-screen naked-eye 3D all-in-one machine structure and a preparation method thereof. The all-in-one machine structure comprises an outer frame, a raster, a curing adhesive, a glass substrate, and an integrated board card. One side of the raster is connected with the glass substrate by the curing adhesive; and the edge of the glass substrate is in contact with the outer frame. The overall outer frame is a U-shaped groove; and a liquid crystal module group and the integrated board card are installed in the groove of the outer frame. And the raster faces one side of the groove of the outer frame. In addition, the preparation method comprises the following steps: step A, cutting a glass substrate; step B, carrying out raster pasting; step C, fixing the substrate; step D, carrying out alignment; and step E, carrying out assembling. According to the invention, the novel naked-eye 3D all-in-one machine structure with high stability and good aesthetic property has great competitiveness on a future market.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD

Electrical quantity processing and network transmission method for intelligent transformer terminal

The invention discloses an electrical quantity processing and network transmission method for an intelligent transformer terminal, and the method comprises the following steps: S1, enabling the intelligent transformer terminal to collect electrical quantity data, converting the electrical quantity data into a digital quantity and storing the digital quantity in a volatile memory; S2, judging whether the operation condition of a transformer is abnormal or not: switching to step S3 if the operation condition of the transformer is normal; S3, calculating the effective value of the electrical quantity, storing the effective value into an effective value region of a non-volatile memory, and extracting the maximum values at intervals of one minute, wherein the maximum values serve as the final data which is transmitted to a background data center; S4, transmitting the maximum values, serving as the final data, of the electrical quantity to the background data center; or switching to step S3' if the operation condition of the transformer is abnormal; S3': recording the time scalar at the abnormal moment; S4', cutting the related original sampling data from the volatile memory at step S1; S5', employing a light-duty compression algorithm for compression, and obtaining the compressed sampling data; S6', actively uploading the compressed sampling data to the background data center. The method exerts lower requirements for the calculation and processing capability of the intelligent transformer terminal, can timely find out and report the abnormality, is small in occupied bandwidth, and avoids the generation of a large amount of redundancy data.
Owner:顺特电气设备有限公司

Preparation method of modified sulfur coated with two-component film forming agent

The invention relates to a preparation method of modified sulfur coated with a two-component film forming agent. The preparation method is characterized by comprising the following steps: successivelyadding various film forming agents in a stirring tank through a measuring tank for blending and adding an inorganic powder material suspension in the stirring tank for uniform mixing for later use; adding sulfur powder in a mixer in advance and then adding the mixed suspension in an accelerant powder according to the proportion requirements for uniform mixing; mixing the material by adopting themixer, then rolling through a roller, dispersing through a dispersing machine to obtain a mixed material, granulating by using an oscillating granulator, then conveying wet material grains in a dryerfor drying, crushing a dried product through a crusher, cooling, sieving and packaging to obtain a finished product. The preparation method provided by the invention has the advantages that the equipment requirements are simple, the cost is low, the safety is high, the preparation process is quick and efficient, the environment is friendly, no pollution exists, the release rate of sulfur is high at the sulfurization stage, no frost is sprayed, the processing safety performance of a rubber product is improved, and economic benefits are better.
Owner:安徽固瑞特新材料科技有限公司
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