39results about How to "Improve migration speed" patented technology

The invention provides a database adaptive migration method and system based on a credential environment, and relates to the technical field of data processing.The method comprises the steps that an intelligent migration model is used for analyzing the structure, including a table structure, index configuration, constraint conditions and data types, of a source database, data size distribution is calculated, and a source database structure feature result is generated; according to a source database structure feature result, automatically selecting and configuring a target database type, adjusting environment parameters of a target database, and generating target database configuration information; according to the structure of a source database and configuration information of a target database, a data mapping rule is automatically established by utilizing an intelligent migration model, and the data mapping rule comprises automatic correspondence of table names and field names, automatic conversion of data types, and an automatic migration scheme of indexes and constraints. According to the method, automatic and intelligent migration from the source database to the target database is realized through the intelligent migration model, the performance is automatically optimized, the migration report is generated, and the migration efficiency and quality are improved.

The invention provides a credential platform data migration verification method and system, and relates to the technical field of computers.The method comprises the steps that all to-be-migrated source data in a credential platform database are read, basic information of the source data is obtained, and a data label is set for each piece of data; reading fields and contents in the migration data, and constructing a data similarity verification model; selecting a migration path and a target database according to the migration demand, and dynamically evaluating the similarity between the source data and the target data through a data similarity verification model; verifying the migrated source data based on the target database, and performing incremental verification on data of different fields in the table; the data table of the to-be-migrated source data is verified in real time among different migration nodes, data changes on each node are verified step by step through an increment verification mechanism, if data missing or verification inconsistency occurs in the verification process, an alarm mechanism is triggered, and the problem of data missing or inconsistency can be automatically recognized and corrected.

The embodiment of the invention discloses a distributed migration method and device for a database and a medium, is applied to the technical field of data migration and is used for solving the problem that existing data migration is low in efficiency and unreliable. The method comprises the steps of collecting a DDL script of a to-be-migrated database object in a source end database, and performing grammar analysis on the DDL script to obtain a compatibility evaluation result of the current to-be-migrated database object; determining a data scale of the to-be-migrated database object based on a compatibility evaluation result, executing a task allocation strategy corresponding to the to-be-migrated database object according to the data scale, and allocating a migration task of the to-be-migrated database object to a task queue of a working cluster; and monitoring the working state when the working node executes the migration task of the task queue, and if the working node is determined to be abnormal based on the working state, determining the uncompleted migration task of the task queue based on the management node, and performing redistribution.

The invention relates to the technical field of batteries, provides a pole piece, a preparation method thereof and a battery, and aims to relieve the technical problem of large concentration polarization in the pole piece. The pole piece comprises a current collector and a composite layer arranged on the current collector, the composite layer comprises a first active material layer and a liquid absorption layer which are sequentially arranged in the direction away from the current collector, and the first active material layer is provided with a first surface away from the current collector; a concave part extending from the first surface to the interior of the first active material layer is also formed on the first active material layer, and the liquid absorption layer covers the first surface and the inner surface of the concave part.

The invention discloses an ammonia-nitrogen wastewater treatment device and method capable of generating target ammonium salt, the ammonia-nitrogen wastewater treatment device comprises a bipolar membrane electrodialysis device and a membrane contactor, the bipolar membrane electrodialysis device comprises at least one treatment unit and an anode chamber and a cathode chamber which are separated by the treatment unit; the treatment unit comprises a front bipolar membrane, a front cation exchange membrane, a middle bipolar membrane, an anion exchange membrane, a rear cation exchange membrane and a rear bipolar membrane which are sequentially arranged in the direction from the anode chamber to the cathode chamber, and a feeding chamber, an ammonia production chamber, an acid production chamber, a desalting chamber and an alkali production chamber are respectively formed in spaces generated between the corresponding membranes; the membrane contactor comprises a breathable hydrophobic membrane dividing an inner cavity of the membrane contactor into a first chamber and a second chamber, and the first chamber and the second chamber communicate with the ammonia production chamber and the acid production chamber through pipelines correspondingly. And the method has relatively high application and popularization values.

The invention relates to the technical field of electrolytic capacitors, in particular to a high-frequency rapid charge and discharge aluminum electrolytic capacitor for a servo motor and a manufacturing method, the high-frequency rapid charge and discharge aluminum electrolytic capacitor comprises an anode foil, a cathode foil, a capacitor shell and electrolyte, porous electrolytic paper is arranged between the anode foil and the cathode foil, and oxide film layers are arranged on two sides of the anode foil. A stable and compact oxidation film is generated on the surface of the anode foil through the phosphoric acid formation liquid, so that the anode foil can withstand high-current impact, and the charging and discharging speed is greatly improved. According to the high-frequency rapid charging and discharging aluminum electrolytic capacitor for the servo motor and the manufacturing method, the high-frequency rapid charging and discharging aluminum electrolytic capacitor for the servo motor has excellent rapid charging and discharging performance, high voltage resistance, good temperature stability, long service life, high reliability and good heat dissipation performance.

The invention relates to a data pre-migration method and device of a virtual machine, a storage medium and electronic equipment. The method comprises the following steps: determining a target virtual machine to execute a live migration operation; determining target data located in a local disk of the current node and virtual machine data located in a shared storage in the data of the target virtual machine; migrating the target data to a local disk of a destination node of the target virtual machine; and under the condition that the target data is successfully migrated, migrating the virtual machine data of the target virtual machine to the shared storage of the destination node. The technical problem of long time consumption of live migration of the virtual machine is solved.

The invention discloses a preparation method of a modified MXene / epoxy resin composite anticorrosive coating, and belongs to the technical field of anticorrosive coating materials. The preparation method disclosed by the invention comprises the following steps: (1) mixing an L-sodium erythorbate solution with an MXene dispersion liquid to obtain L-sodium erythorbate / MXene powder; (2) adding acetone into epoxy resin for dilution to obtain an epoxy resin solution; the preparation method comprises the following steps: adding L-sodium erythorbate / MXene powder into DMF (Dimethyl Formamide) to obtain an L-sodium erythorbate / MXene dispersion liquid; and adding glycidyl methacrylate, a flatting agent and 650 low-molecular polyamide to obtain the composite anticorrosive paint. MXene is modified by L-sodium ascorbate, so that the dispersity of MXene in epoxy resin is improved, a layer-by-layer stacked densified structure is formed in the epoxy anticorrosive coating, holes formed after solvent volatilization are reduced, the transmission path of a corrosive medium is increased, the shielding effect is effectively formed, and the anticorrosive performance is improved.

The invention discloses a three-layer sodium-ion battery diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms.The diaphragm is of a three-layer A / B / A structure, the A layer is made of sodium-based montmorillonite modified cellulose-based diaphragm, montmorillonite has a high specific surface area and a pore structure, battery permeability and ion transmission efficiency are improved, and energy density and cycling stability are improved. The montmorillonite is subjected to sodium modification, and the sodium montmorillonite is superior to common montmorillonite and is high in dispersity, thermal stability and cation exchange capacity. According to the modified montmorillonite cellulose diaphragm, montmorillonite is hydrated to form a sheet structure to adsorb metal particles with positive charges, and montmorillonite-cellulose combination of the diaphragm is enhanced by combining with fibers with negative charges. The wettability and the liquid absorption rate are improved by the cellulose-based diaphragm, the degree of freedom of sodium ions is enhanced by the sodium montmorillonite, the ion migration speed is increased, and the battery performance is improved. And the layer B adopts a polyolefin diaphragm, so that the temperature requirements under different conditions are met, and the self-turn-off performance is provided.

The invention belongs to the technical field of biomedical materials, and provides an antibacterial healing-promoting hydrogel dressing which at least comprises a hydrogel layer and a drug-loaded nanofiber membrane layer, the hydrogel layer at least comprises a carrier substance and a thermocouple ion pair supply substance, and a drug-loaded nanofiber membrane at least comprises a fiber membrane carrier and drug powder. The invention also provides a preparation method of the antibacterial healing-promoting hydrogel dressing, which comprises the following steps: by taking hexafluoroisopropanol as a solvent, adding the polylactic acid-glycolic acid copolymer, the gelatin and the medicine powder to prepare a spinning solution; carrying out electrostatic spinning on the prepared spinning solution to prepare a drug-loaded nanofiber membrane; the method comprises the following steps: by taking water as a solvent, adding sodium chloride and a thermocouple ion pair supply substance, stirring until fully dissolving, adding a photo-thermal reagent, and ultrasonically dispersing uniformly to obtain a mixed solution A; preparing a polyvinyl alcohol aqueous solution, adding the polyvinyl alcohol aqueous solution into the mixed solution A, and fully stirring to obtain a hydrogel precursor mixed solution; and soaking the prepared drug-loaded nanofiber membrane into the hydrogel precursor mixed solution, and performing freeze-thaw cycle to obtain the antibacterial healing-promoting hydrogel dressing. The hydrogel with the thermoelectric effect is used in cooperation with the drug-loaded nanofiber membrane, drug release of the drug-loaded nanofiber membrane layer is promoted, and therefore wound healing is promoted.

The invention relates to the technical field of battery electrolytes, and discloses a low-temperature performance electrolyte, a preparation method of the electrolyte, a battery and electronic equipment. The method comprises the following steps: uniformly mixing a solvent, a lithium salt, an ionic liquid and an additive to prepare the electrolyte with low-temperature performance; the ionic liquid is imidazole ionic liquid or pyridine ionic liquid; and the additive is polysiloxane. The mixed solution of polysiloxane and the ionic liquid is adopted as the mixed additive, the main chain structure of polysiloxane is formed by alternating silicon atoms and oxygen atoms, and the special structure has a transmission effect on transportation of lithium ions, so that the migration speed of the lithium ions between the positive electrode and the negative electrode is greatly increased, and the conductivity of the lithium ion battery is improved. And the ionic liquid has the advantages of low volatility, non-inflammability, good ionic conductivity, wide operable temperature range and the like, so that the prepared electrolyte has excellent electrochemical performance even in a low-temperature environment through combination of the ionic liquid and the electrolyte.

This application provides a data migration method, apparatus, control device, and readable storage medium. The method includes: creating a migration link between a source database and a destination database of data to be migrated; splitting the data to be migrated and the migration link, and stopping the splitting if the running status information of the migration link becomes abnormal. In this application, the method of splitting the migration link significantly increases the overall migration rate of the entire data migration; and by obtaining the running status information of the migration link, a controllable increase in the migration rate is achieved, effectively improving the migration speed.

The invention discloses a silicon negative electrode active material which sequentially comprises a silicon-based material inner core, a flexible solid electrolyte or gel electrolyte middle layer and a carbon-coated outer layer from inside to outside, the flexible solid electrolyte or gel electrolyte middle layer comprises a conductive agent, and the conductive agent comprises a carbon nanotube. According to the silicon negative electrode active material, the surface of the silicon-based material is coated with the flexible solid-state or gel-state electrolyte, so that the volume change of the negative electrode active material in the charging and discharging process is effectively relieved, the electrolyte is isolated, the stability of the negative electrode active material is improved, and the negative electrode active material has relatively high reversible specific capacity and relatively high specific surface area; and excellent long cycle performance is shown.

The present invention relates to the technical field of sodium ion battery electrode materials, specifically a single-phase ternary iron-based sulfide selenide composite material and its preparation method and application, wherein the preparation method is to use sodium alginate with abundant reserves as a precursor; utilize the abundant carboxyl and hydroxyl groups in the structure to crosslink the chelation between iron ions in one step to form a gel of sodium alginate wrapped metal; after the gel is refrigerated, it is simultaneously sulfide-selenized with sulfur and selenium sources by vapor deposition in an inert atmosphere, and the corresponding single-phase ternary iron-based sulfide selenide composite material can be obtained after cooling to room temperature. The present invention has the characteristics of improving material structure and performance, improving the electrochemical properties of such negative electrode materials, including material conductivity, structural stability, specific capacity, cycle stability and rate performance of sodium ion batteries, and significantly improving the cycle performance and rate performance of sodium ion batteries.

The application discloses an inorganic composite solid electrolyte and a preparation method thereof, and relates to the technical field of lithium batteries, and specifically discloses an inorganic composite solid electrolyte and a preparation method thereof. The preparation method of the inorganic composite solid electrolyte comprises the following steps: S1, mixing lithium salt, metal oxide A, metal oxide B and ammonium dihydrogen phosphate, wherein the metal oxide B is titanium oxide, and intermittent vibration ball milling is performed to obtain mixed powder; S2, adding lanthanum oxide and germanium oxide into the mixed powder obtained in the step S1, and continuing to perform intermittent vibration ball milling to obtain composite powder; and S3, performing low-temperature sintering on the composite powder obtained in the step S2, and pressing to obtain an inorganic composite solid electrolyte film layer. The preparation method can significantly improve the reaction activity and synergistic effect among raw materials by adopting two-step intermittent vibration ball milling and one-step low-temperature sintering, and the conductivity of the inorganic composite solid electrolyte and the lithium ion transmission performance and cycle life of the solid battery are improved, and meanwhile, no solvent is used in the preparation process, and the sintering cost is reduced.

The utility model provides a construction warning device, belongs to the technical field of construction safety, and aims to improve the convenience and efficiency of field operation. The supporting and fixing mechanism is used for supporting and fixing the warning body and comprises a fixing assembly, and the fixing assembly is fixed to the ground; the fixing assembly comprises a fixing bottom plate and a fixing base plate, an extrusion plate; an elastic support body; one end of the pressing plate is fixed on the fixed bottom plate, and the other end of the pressing plate is fixed on the extrusion plate; one end of the limiting rod penetrates through the extrusion plate and abuts against the fixed bottom plate; and a fixing member. Wherein the fixing part sequentially penetrates through the extrusion plate, the fixing bottom plate and the ground so that the fixing assembly can be fixed to the ground, and the extrusion plate is arranged in a sliding range formed by the limiting rod and the elastic supporting body in a sliding mode. The warning device has the technical effects of strong warning effect and simplicity in operation.

The application discloses a preparation method of a polyanionic sodium ion battery positive electrode material, and comprises the following steps: S1, preparation of a precursor solution: a transition metal M source, an acid solution and a complexing agent are mixed and dissolved to form a precursor solution; S2, preparation of a pre-oxidized precursor solution: an oxidizing agent is added to the solution to generate a pre-oxidized precursor solution; S3, preparation of M(OH)x precipitation: a pH value of the pre-oxidized precursor solution is adjusted so that transition metal ions in the solution are precipitated in the form of M(OH)x; S4, preparation of a precursor powder: the M(OH)x precipitation, a sodium source, a phosphorus source and a carbon source are mixed wetly to obtain a precursor slurry; S5, drying of the precursor powder: the precursor slurry is dried and separated to obtain a dried precursor powder; and S6, high-temperature sintering: the precursor powder is sintered at a high temperature to obtain a polyanionic material. The polyanionic sodium ion battery positive electrode material has the characteristics of excellent electrochemical performance, high compaction density and low cost.

The present invention relates to the technical field of multi-machine cloning cross-regional data transmission, specifically a method and system for multi-machine cloning cross-regional data transmission of a cloud phone; first, a user submits a cloning task request, the system generates a task list according to the request, calculates the required resources and allocates them to the target area, establishes a task framework diagram, then logically divides the instance data, marks the difference data blocks, and authenticates the link relationship between instances through a dual link protocol, then combines multi-threading technology to transmit the difference data blocks, and dynamically balances thread task allocation to optimize efficiency. During the transmission process, the system performs consistency verification on the data, detects and retransmits the erroneous data blocks, and uses a timeout and a maximum number of mechanisms to avoid infinite retransmissions. The final target instance completes data reconstruction by merging the difference data blocks, and verifies data consistency through a hash value. The present invention is based on task management, data sharding, link authentication, and verification and repair to ensure efficient and secure data cloning.

The present invention relates to the field of sodium ion battery electrode materials, specifically a selenium-induced defect copper-based sulfur / selenide material and its preparation method and application, and a novel copper-based metal organic framework compound Cys-Cu precursor is preferentially prepared by a coprecipitation strategy; the precursor and a selenium source are then pyrolyzed and selenized under an inert atmosphere, and then naturally cooled to room temperature to obtain a product. The preparation method makes full use of the advantages of heteroatoms such as S / N in the ligand in the precursor, and a copper-based sulfur-selenide composite material with rich vacancies is obtained only by the preparation and selenization of the precursor, and the manufacturing process is simple and efficient, the cycle is short, and the stability is good. The composite material obtained by the method contains rich cation vacancies and a heterogeneous interface spontaneously constructed by copper-based sulfide and selenide, which can not only improve the material conductivity, promote effective electron / ion transport, but also create more sodium storage active sites, and further improve the material sodium storage capacity and structural stability.

The present invention discloses a terminal migration acceleration method and device, the method is applied to a switching device, comprising: when the terminal passes the media access control MAC authentication when accessing the switching device for the first time, the Internet Protocol address IP and the media access control address MAC of the terminal are stored in a chip as global user entries; and the MAC authentication module of the switching device sends an address resolution protocol ARP detection message to the terminal to learn the ARP entry. The embodiment of the present invention can solve the problem in the prior art that the terminal migration time is too long, resulting in a long interruption time.

This invention discloses a rapid test card for ABO, RhD blood typing and sickle cell anemia, comprising a card holder, a card cover, an ABD test strip, and an SCD test strip. The ABD and SCD test strips are installed in the card holder, and the card cover is affixed to the card holder. This invention can simultaneously detect ABO, RhD blood typing, and SCD. By improving sample processing, test point layout, and test strip design, it overcomes the shortcomings of existing technologies, significantly improving the accuracy, simplicity, and efficiency of the test, making it particularly suitable for point-of-care testing.

The utility model relates to microorganism strain proportioning technical field discloses a kind of experimental devices for microorganism strain proportioning, including jar body, installation position is opened in jar body;Mixed component, mixed component is set in jar body, and mixed component is used to proportion and mix to microorganism strain, and mixed component includes driving motor, movable frame, auger shaft and fixed block, driving motor is fixedly connected with jar body, movable frame is set in jar body, movable frame is drivingly connected with driving motor, auger shaft array is set in jar body, each auger shaft is drivingly connected with driving motor, multiple fluid effects are formed by the cooperation of mixed component internal parts, under the cooperation of multiple fluid effects, avoid in stirring Large amount of foam covers liquid surface to hinder oxygen dissolving, lead to aerobic bacteria growth is limited;Foam layer hinders liquid flow, causes local strain or nutrient concentration difference;Foam occupies reactor space, reduces actual utilization rate and other problems.

The present invention discloses a graphite negative electrode material with good stability, a preparation method and application thereof, and relates to the technical field of graphite negative electrode material preparation. The present invention adopts melamine resin sponge as the basic skeleton of the electrode. After carbonization treatment, the skeleton has a stable three-dimensional network structure, and its unique spatial form can effectively buffer the volume change experienced by the modified graphite during the battery charging and discharging process. In addition, the appropriate carbon layer spacing of the melamine resin sponge works together with the three-dimensional buffer network to ensure that the modified graphite can fully contact with the electrolyte, thereby improving the overall performance of the battery.

The present invention provides a database adaptation migration method and system based on a trusted innovation environment, and relates to the field of data processing technology. The method comprises: using an intelligent migration model to analyze the structure of a source database, including table structure, index configuration, constraint conditions, and data types, and calculating data volume distribution, and generating source database structure feature results; according to the source database structure feature results, automatically selecting and configuring the target database type, adjusting the environmental parameters of the target database, and generating target database configuration information; according to the structure of the source database and the target database configuration information, using an intelligent migration model to automatically establish data mapping rules, including automatic correspondence of table names and field names, automatic conversion of data types, and automatic migration schemes of indexes and constraints. The present invention realizes automated and intelligent migration from a source database to a target database through an intelligent migration model, and automatically optimizes performance, generates a migration report, and improves migration efficiency and quality.

The application discloses a data migration method and related device, and a data migration system comprises a data migration unit, the data migration unit comprises a thread manager, at least one data reader and at least one data writer. The thread manager acquires the disk bandwidth of the source cluster, determines the number of threads for executing data migration according to the disk bandwidth, and establishes one or more threads according to the number of threads. The target thread corresponds to a target data reader and a target data writer, the target data reader acquires the target row key from the message queue, acquires the target to-be-migrated data corresponding to the target row key from the source cluster according to the target row key, and sends the target to-be-migrated data to the target data writer, and the target data writer stores the target to-be-migrated data into the target cluster. Therefore, the number of threads is dynamically adjusted according to the disk bandwidth to dynamically adjust the migration speed of data according to the business situation, and the influence of the data migration business on the source cluster business is avoided.

The embodiment of the invention provides a lithium supplementing method, a lithium supplementing device, a lithium supplementing negative plate, a lithium supplementing battery and electronic equipment, and relates to the technical field of batteries. The method is applied to a lithium supplementing device, the lithium supplementing device comprises a rolling mechanism and a heating mechanism, the rolling mechanism comprises a first compression roller and a second compression roller, and the method comprises the following steps: conveying a negative pole piece and a lithium source material to a gap between the first compression roller and the second compression roller; controlling the first compression roller and the second compression roller to move so as to roll the lithium material on the lithium source material onto the active substance layer of the negative pole piece to obtain a lithium-supplemented negative pole piece; and controlling the heating mechanism to at least heat the binding surface of the lithium material and the active material layer so as to accelerate and uniformly permeate the lithium material into the active material layer. According to the lithium supplementing method provided by the embodiment of the invention, the binding surface of the lithium material and the active material layer is heated through the heating mechanism, so that the rate that the lithium material permeates into the active material layer can be improved, the production efficiency and the yield of the battery can be improved, and the production cost can be reduced.

The method comprises the following steps: firstly, externally connecting a mechanical pump at a tail gas outlet of a migration tube to reduce the working air pressure in the migration tube, and increasing the optical path distance of an ultraviolet lamp in an ionization region by reducing the interferent content of background gas in the migration tube; secondly, the ion composite reaction probability is reduced by increasing the field intensity of the ionization region of the migration tube; the combination of the two can improve the ion number density of the target analyte detected by the detector while improving the ion migration speed, thereby significantly improving the detection sensitivity of the ion mobility spectrometry. The requirements for regulating and controlling the air pressure and the electric field are low, the detection performance of the ion mobility spectrometry can be remarkably improved under the easily-achieved experiment condition, high-throughput sample analysis and detection can still be achieved under the low-air-pressure condition, and the method has universality for the ion mobility spectrometry.

Disclosed is a positive electrode active material for improving the performance of an electrochemical device. The positive electrode active material comprises an overlithiated layered oxide (OLO), and has an R value (defined by Formula (1) R = (P A / P B ) of not more than 27. According to small-angle X-ray scattering analysis, in Formula (1), P A is the volume (cm 3 / g) of macro pores contained in the positive electrode active material, P B is the volume (cm 3 / g) of micro pores contained in the positive electrode active material, the macro pores have a maximum volume fraction in the pore radius range of 2 to 50 nm, and the micro pores have a maximum volume fraction in the pore radius range of 0.5 to 2 nm.

Embodiments of the present application provide a data table creation method and device, the method comprising: obtaining a creation instruction of a first partition table, the creation instruction comprising annotation information, the annotation information being used to indicate creation of a partition table of a skip consistent hashing type; creating the first partition table according to the creation instruction, and generating disk-falling information, the disk-falling information comprising the annotation information; and generating a table definition cache corresponding to the first partition table according to the disk-falling information, the table definition cache comprising: the type of the first partition table being the skip consistent hashing type. Based on the partition table of the skip consistent hashing type, the efficiency of migrating data is improved.

According to the present invention, a sulfide-based solid electrolyte is provided, the sulfide-based solid electrolyte comprising a Li-P-S-based compound, the Li-P-S-based compound comprising at least one compound selected from the group consisting of P < 1-b > M S < 4-a > Sea3-(0 lt; a is less than or equal to 1.5, 0lt; blt; and M represents at least one element selected from the group consisting of Si, Ge, Sn, and Al), and a lithium secondary battery in which an electrolyte layer containing the sulfide-based solid electrolyte is provided on a positive electrode.