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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.