150results about How to "Even consistency" patented technology

The invention discloses a massive data storage method based on file granularity. The massive data storage method comprises the following steps of (1) dividing a data storage cluster into a plurality of partitions, wherein each partition is provided with a partition value; (2) creating a business data sheet for the record of each department, and setting a partitioning rule for the records of each business data sheet; (3) for each record in the to-be-stored business data, storing into a file of the corresponding partition according to the number and a partitioning rule, and creating an index file; storing the number of the record, the path of the file, the number of a storage node, and the number of storage equipment into a metadata file; furthermore, creating a view between the business data sheets; according to the metadata file, separating the business data sheet, the view, the record partition and the index information belonging to the same business scene into the same database, so as to obtain a massive metadata management model. The massive data storage method has the advantages that the data management accuracy is improved, and the data division and organization flexibility is improved.

The invention discloses a heat resistant lubricant used for drawing refractory metal and a preparation method thereof. The heat resistant lubricant comprises the following components by weight: 10-30% of graphite, 0.1-2% of dispersant, 0.3-5% of thickening agent, 0.1-15% of emulsifier, 0.5-10% of film forming agent, 2-5% of ammoniacal liquor with concentration of 25%, 0.1-1% of antiseptic, 0.1-2% of adhesive, 0.3-3% of surfactant and balance of water. The heat resistant lubricant has good adhesive force under high temperature and can not generate explosion and shedding, lubricity, thermal conductivity and surface antioxidation performance between the drawing material and a mold can be effectively increased, heat due to friction can be reduced, and usage life of the mold can be prolonged.

The invention discloses a missile heavy-gravity tungsten alloy and a preparation method thereof, and belongs to the field of metal materials. The missile heavy-gravity tungsten alloy consists of the following alloy components in percentage by mass: 90.0%%-97.0% of tungsten, 0.1%-2.0% of zirconium oxide, 2.0%-9.9% of binding-phase nickel and iron, and inevitable impurities, wherein a mass ratio of the nickel to the iron is (3-4) to (2-1). The preparation method comprises the following steps: respectively dissolving ammonium metatungstate and zirconium nitrate into water, mixing to obtain mixed liquor, drying the mixed liquor to obtain power, roasting and reducing the powder to obtain composite tungsten powder; taking nickel powder and iron powder, carrying out ball-milling on the nickel powder and the iron powder after mixing, thereby obtaining a nickel-iron solid solution; mixing the composite tungsten powder with the nickel-iron solid solution to obtain mixed powder, and pressing and sintering the mixed powder to obtain the missile heavy-gravity tungsten alloy. According to the invention, high-temperature steady-phase ZrO2 is added into the tungsten alloy, a ZrO2 dispersed phase is fine and is uniformly distributed in a tungsten base body, so that the problem of poor mechanical property because of low compactness and uneven phase distribution of the missile tungsten alloy is solved; tensile strength of the tungsten alloy is higher than 1250MPa, and ductility of the tungsten alloy is higher than 17%; and the missile heavy-gravity tungsten alloy has the characteristics of high strength and high plasticity.

The invention discloses a high-density tungsten alloy and a preparation method thereof, belonging to the field of metal materials. The tungsten alloy comprises the following components in percentage by mass: 95.0-99.0 percent of tungsten, 1.0-5.0 percent of zirconium oxide and inevitable impurities. The preparation method comprises the following steps: (1) respectively dissolving ammonium metatungstate and zirconium nitrate in water for mixing; drying the mixed liquid, and thus obtaining powder; calcining and reducing the powder, and thus obtaining composite tungsten powder; (2) after ball milling, carrying out compression molding and sintering for the composite tungsten powder, and thus obtaining a sintering billet; after dehydrogenation, carrying out deformation and thermal treatment for the sintering billet, and thus obtaining the high-density tungsten alloy. According to the preparation method, a ZrO2 strengthening phase is added in a tungsten matrix through a liquid-liquid doping method, and two segments of sintering processes, dehydrogenation and rotary swaging treatment are adopted to prepare the tungsten alloy. The preparation method solves the problems of uneven distribution of the strengthening phase of the traditional tungsten alloy, hydrogen embrittlement and low sintered density and provides a new direction for the application and development of the tungsten alloy in the new field.

The invention discloses a dual-target direct equalization circuit of a battery pack. A series battery pack comprises at least three single batteries and is divided into an upper part and a lower part,each single battery is connected with an equalization sub-circuit, the equalization sub-circuit comprises two metal-oxide-semiconductor field-effect transistors (MOSFETs) and an energy storage inductor, the series battery pack and the equalization sub-circuit bridge between VCC and GND, each equalization circuit is also connected with a control circuit to achieve direct equalization on an equalization target, the control circuit is used for equalizing end voltages and SOC of the single batteries in a stage way within an equalization period by simultaneously taking the end voltages and the SOCof the single batteries as equalization indexes, and dual-target equalization on the end voltages and the SOC of the single batteries is achieved by controlling on/off of the two MOSFETs of the equalization sub-circuit and by an energy storage effect of the energy storage inductor. The equalization circuit and an equalization strategy are applicable to an equalization management system of an energy storage device in a hybrid electric vehicle, a blade electric vehicle and an energy storage power station.

The invention provides a method for preparing a large-size molybdenum plate blank, and belongs to the technical field of powder metallurgy. The method includes the steps that reducing molybdenum powder serves as a raw material, and small-granularity molybdenum powder which is evenly dispersed, has narrow granularity distribution and is nearly spherical is obtained through airflow milling treatment; then the small-granularity molybdenum powder and a paraffin binder are evenly mixed, and a mixture is obtained; and then by the adoption of a secondary isostatic cool pressing forming process, a degreased blank is isostatically pressed into a secondary blank under high pressure intensity. A sintering method of low-temperature slow heating and high-temperature rapid heating is adopted, specifically, slow heating is carried out at a low-temperature sintering stage, the blank is fully reduced in order to reduce the oxygen content in a blank body, and therefore the sintering activity of the blank is kept; and rapid heating is carried out at a high-temperature sintering stage, grain growth can be reduced, and after sintering is completed, the thick molybdenum plate blank with high density andhigh tissue uniformity can be obtained. By means of the preparation method, the problems that local looseness and cracks are easily generated in former large-size thick molybdenum plates are solved,the density of the prepared molybdenum plate blank reaches 99% or above, and the uniformity and the consistency of tissue of the surface and the center position of the plate blank can be guaranteed.

The invention discloses a preparation method for producing deep-drawn cold-formed medicinal aluminum foil with a cast-rolling billet in a short process. The method sequentially includes the steps of smelting, cast rolling, cold rolling, homogeneous high-temperature treatment, intermediate rolling, slitting shear trimming, intermediate annealing, finish rolling, foil rolling, coil combining, finished product rolling, parting-off, and furnace loading for annealing. Raw materials of the deep-drawn cold-formed medicinal aluminum foil include an aluminum alloy and an Al-Fe intermediate alloy with amass content of 20% or a Fe-containing additive with a mass content of 75%, and elements in the aluminum alloy include 0.025-0.10% of Si, 1.25-1.65% of Fe, 0.001-0.10% of Cu, less than 0.05% of Mn, less than 0.05% of Mg, less than 0.05% of Cr, less than 0.05% of Zn, 0.01-0.04% of Ti and the balance A. By means of the recorded preparation method, final product detection shows that the end face layer offset after parting-off is less than or equal to 0.5 mm, the width of the corrugated edge is 3 mm, and the peak value is 1 mm; the surface cleanliness dyne value is greater than or equal to 65 dyn; as for mechanical properties, the tensile strength is 80-115 MPa, the elongation rate is 23%, and the yield ratio is 42%; and the Erichsen value is 5.0 mm, the deep drawing height is 2.0 mm, the surface hardness value is 22 HV, the bursting strength is 400-800 Ka, and the surface swabbing reaches level A.

The invention relates to a polytetrafluoroethylene fiber tubular film, which comprises a polytetrafluoroethylene material body, wherein the polytetrafluoroethylene is fibrous, the diameter of the fiber is more than 200 nm and is less than or equal to 2000 nm, the polytetrafluoroethylene material body has pore cavities with a pore size of 10-2000 nm and cavity walls formed by surrounding the pore cavities in a three-dimensional space manner, the pore cavities are uniformly distributed and are communicated in a three-dimensional manner, various pore cavities present the uniform distribution on the porous material under any unit-scale volumes, and the porosity is more than or equal to 65%. According to the present invention, the uniform pore cavity distribution mode of the polytetrafluoroethylene fiber tubular film can be concretely and clearly measured, wherein the pore distribution uniformity of the porous material and the multi-level structure thereof are measured by using the small unit-scale volumes, such that the porous structure is highly uniform so as to ensure the uniformity of various performances of the porous material.

The invention provides a method for testing electrochemical performance of polyaniline synthesized by a chemical method. The method comprises the following steps: when synthesizing the polyaniline by the chemical method, adding carbon paper before a polymerization reaction, and sufficiently moistening the carbon paper; adding initiator, such as ammonium persulfate solution, to make the polyaniline perform the polymerization reaction by taking the carbon paper as a center and evenly adsorbed on the surface on the carbon paper; at any time of the polymerization reaction, taking the carbon paper out; and using the carbon paper as an electrode to test the electrochemical performance of the polyaniline. The method adopts the carbon paper as a carrier to carry out testing on the electrochemical performance of the polyaniline, thereby effectively solving the problems of sensibility, accuracy and stability in the electrochemical test of the polyaniline. The method is simple and accessible, does not have pollution, has low cost, and has important reference significance and universality for the test of the electrochemical performance of high polymer.

The invention discloses a steel plate for a vanadium nitrogen series Q460 strength grade low-temperature container and a production method thereof. 0.005%, Ni: 0.25-0.35%, Nb: 0.025-0.033%, V: 0.15-0.20%, Al: 0.035-0.040%, N: 0.015-0.025%, the rest are Fe and inevitable impurities; the production method includes Rolling, quenching and tempering process. The overall performance and structure of the vanadium nitrogen series Q460 strength grade low-temperature container steel plate produced by the invention are uniform, the impact toughness is excellent at -40°C, the lower yield ratio greatly improves the safety factor of the product, the overall performance is uniform and stable, and the effective Improve production efficiency and reduce production costs.

The invention provides a remediation agent for cadmium contaminated soil and a soil remediation method. The remediation agent comprises magnesium oxide, sepiolite, magnesium calcium-based bentonite, and zeolite, and can be used for in-situ remediation performed on the cadmium contaminated soil. The remediation agent takes magnesium oxide as a main passivator component for cadmium, additional threeclay minerals are added to serve as adsorbent and stabilizer components to form a mixture, after the remediation agent and the contaminated soil are uniformly mixed, the initial water content is adjusted to a saturated soil water content, and the remediation agent is left to stand for 3 to 10 days, so that normal plant seeding can be performed. The remediation agent reduces the bioavailability and transferability of heavy metal elements in the cadmium contaminated soil, improves soil self-purification capacity, and improves the soil fertility status, thereby guaranteeing the high quality, high yield and safety of agricultural products, ensures that the soil remediation is short in reaction period, good in effect, long in duration and wide in application range, and cannot cause secondary pollution.

The invention provides a data recovery method and device. The method comprises the steps that to-be-recovered data is determined, and data information of the to-be-recovered data is written into a first mapping table; when a write request sent by a client is received, whether or not the data information matched with the write request exists in the first mapping table is judged, if yes, the data information matched with the write request is written into a second mapping table, and the data information matched with the write request is deleted from the first mapping table; a storage node corresponding to the write request is determined, and the write request is sent to the storage node to enable the storage node to write data according to the write request; and after a data write completingmessage sent by the storage node is received, it is determined that processing of the write request is completed, the data information matched with the write request is queried out from the second mapping table, and data recovery is conducted by means of the queried-out data information. According to the technical scheme, the IO service availability can be improved, and the data reliability can beguaranteed.

The invention discloses a method and a system for distributing PCS active power by energy storage AGC considering SOC sorting. The method comprises the following steps: acquiring an SOC value of a battery corresponding to each PCS; sorting the SOC values of the batteries, and setting the priority of each PCS according to the sorting of the SOC values; and sequentially issuing the AGC issuing power to each PCS according to the priority of each PCS in combination with the maximum chargeable/dischargeable power value of each PCS until the AGC issuing power is completely distributed. According to the method, the requirements of power charging and discharging, battery consistency and SOC balance can be considered, the consistency of the batteries and the balance of the SOC in the charging and discharging process are considered under the condition that power dispatching is met, the inconsistency of the batteries is reduced, and the most accurate control information is provided for a power dispatching department.

The invention discloses a control method for narrow hardenability bandwidth of gear steel, and belongs to the technical field of gear steel. Accordring to the method, a calculation formula for the hardenability is optimized by adopting production data so as to obtain the calculation parameters suitable for the type of the gear steel, then the upper limit and the lower limit of the components of the elements of C, Si, Mn, Cr, Ni, Mo, Ti and B which influence the hardenability are calculated according to the optimized calculation formula, the hardenability bandwidth at J5, J9, J11 and J13 is required to be 3.5HRC or less, the range of the obtained components is compared with the deviation rage of the components, namely, delta C is smaller than or equal to +/-0.01%, delta Si is less than or equal to +/-0.02%, delta Mn is less than or equal to +/-0.02%, delta Cr is less than or equal to +/-0.01%, delta Ni is less than or equal to +/-0.01%, delta Mo is less than or equal to +/-0.01%, deltaTi is less than or equal to +/-0.01%, delta Al is less than or equal to +/-0.01%, delta B is less than or equal to +/-0.005%, delta S is smaller than or equal to +/-0.002%, finally the narrowest control range is determined as the component control range of the gear steel with the narrow hardenability bandwidth requirement, pouring of low degree of superheat of 10-20 DEG C is adopted, the heating temperature fluctuation of a continuous casting blank is guaranteed to be less than or equal to +/-7 DEG C, the heat preservation time fluctuation is guaranteed to be less than or equal to +/-5 minutes, and therefore a gear steel bar with the hardenability bandwidth of 4HRC or less is obtained.

The invention relates to engraved intaglio plate polishing equipment. The equipment comprises a control system, a pneumatic system, a frame capable of placing an intaglio plate, an X-axis servo mechanism, a Y-axis servo mechanism, a Z-axis servo mechanism and a polishing device, wherein the X-axis servo mechanism, the Y-axis servo mechanism and the Z-axis servo mechanism are arranged on the frame; the polishing device can be driven by the Z-axis servo mechanism to move along the Z-axis direction; the polishing device comprises a constant-pressure control cylinder, an electric device, a polishing head, a polishing pad and a polishing liquid supply system; the constant-pressure control cylinder is arranged on the Z-axis servo mechanism; the electric device is arranged on the constant-pressure control cylinder; the polishing head is arranged at the output end of the electric device; the polishing pad is arranged on the polishing head; and the polishing liquid supply system can provide polishing liquid for the polishing head. The engraved intaglio plate polishing equipment solves the technical problems of low safety, environmental-friendly and healthy hidden danger, low polishing efficiency and low polishing quality of the polishing method in the prior art and has the advantages of safety, environmental protection, high polishing efficiency and high polishing quality.

The invention provides high-performance as-cast austenite-bainite ductile iron and a production method and application thereof. On the basis of ductile cast iron shell mold casting, the adding quantity ranges of bainite forming elements of Mo, Ni and Cu are defined according to the casting size and unshelling time, and through fine control over the deshelling time and the cooling and heat preservation processes, the production method suitable for the as-cast austenite-bainite ductile iron with complex shape characteristics is finally determined. The as-cast austenite-bainite ductile iron obtained through the method has excellent comprehensive mechanical properties, the tensile strength exceeds 900 MPa, the yield strength is not lower than 600 MPa, the elongation is larger than 4%, and theimpact toughness is larger than 65 J/cm<2>. The Brinell hardness of the austenite-bainite ductile iron obtained in the as-cast state is 250-310 HBS and meets the requirement of machining. The as-castaustenite-bainite ductile iron prepared through the method can be used for various metal components which bear large loads and have high safety coefficient requirements, and is particularly suitable for high-performance engine crankshafts.

The invention provides a normal-pressure multi-step sintering method for powder metallurgy of a high-density Ti-Nb-Mo series alloy, and belongs to the technical field of alloys. According to the method, the multi-step sintering is carried out under normal pressure by adopting a temperature programming mode, and different protective atmospheres and gas flow rates are adopted at different temperature programming stages of the sintering, so that the capability of titanium hydride to improve the density of the powder metallurgy titanium alloy is maximally exerted, and the sintered titanium alloy is high in density and uniform and consistent in structure and performance. The results of the method show that the density of the Ti-Nb-Mo series alloy obtained by using the normal-pressure multi-stepsintering method can reach 99% or above, the average grain size is 30.2-39.7 microns, the yield strength of the alloy can reach 960 MPa, the compressive strength can reach 1287 MPa, and the criticalfailure strain is more than 0.7.

The invention discloses a full-mechanical cultivation method of wheat following rice and aims at a rice-wheat rotation system. The method includes the steps of firstly, sunning the field before rice harvesting, and mechanically harvesting rice; secondly, preparing soil before sowing, wherein different soil preparing manners are adopted according to soil water content; thirdly, using different seedprocessing manners to process selected seeds according to different-disease-degree regions; fourthly, determining an appropriate sowing period according to weather, varieties and soil moisture content, using a sowing machine which integrates sowing, fertilizing and compressing to perform sowing in the appropriate sowing period, and applying base fertilizer during sowing, wherein sowing depth is regulated according to soil moisture content; fifthly, performing filed management; sixthly, harvesting from the late dough stage of the wheat to the full ripe stage of the wheat, and returning crushedwheat straw to the field. By the method, the systematic mechanical cultivation technology can be built, the planting quality of wheat following rice can be increased, and high yield can be achieved.