494results about How to "Simplify operation steps" patented technology

The invention provides a method for detecting fatty acid content in animal sample by gas chromatography-mass spectrometry (GC-MS), to solve the problems of complicated sample treatment steps and high cost in conventional methods in practical production and scientific research. The method comprises the steps of treating animal tissue samples; extracting, saponifying and methylating fatty acids; determining GC-MS conditions for fatty acid detection; analyzing data and identifying sample. The method has the advantages of simple operation, low detection limit, good reproducibility, and visual andreliable experiment data; is especially suitable for trace sample detection, can compare fatty acid compositions and contents among different samples, has wider application, and provides a new thought and method for rapid detection of fatty acid composition and content in animal sample for scientific research, clinical application, and food quality and safety monitoring.

The invention provides a Y molecular sieve high in silica alumina ratio and abundant in secondary holes and a preparation method therefor. The preparation method comprises steps of: Y-type zeolite is processed for 1-5 hours at 300-600 DEG C to obtain dry Y-type zeolite, and calculated by SiO2 and Al2O3, the silica alumina mole ratio of the Y-type zeolite is (3-6):1;the temperature is lowered to 200-600 DEG C;in a waterless dry environment, dry air saturated by a dealuminated siliceous reinforcing agent is introduced to the dry Y-type zeolite to react for 0.5h-7h, or in a waterless dry environment, the temperature is raised to 500-700 DEG C at a constant speed, at the same time, the dry air saturated by a dealuminated siliceous reinforcing agent is introduced to the dry Y-type zeolite to react for 0.5h-7h, and a rough product is obtained; the rough product is subjected to alkali treatment for 10min-5h at 30-100 DEG C, solid-liquid mass ratio for the alkali treatment is (1-50):1, and a Y molecule sieve high in silica alumina ratio and abundant in secondary holes is obtained. The invention further provides the Y molecule sieve high in the silica alumina ratio and abundant in secondary holes, obtained by adopting the preparation method and has high silica aluminum ratio and abundant secondary hole structures.

The invention belongs to the lithium ion battery technical field, discloses an anode aqueous binder of a lithium ion battery and a preparation method thereof. The preparation method of the anode aqueous binder of the lithium ion battery comprises follow specific steps: successively adding reactivity emulsifier, water soluble acrylic acid monomers, oil soluble acrylic acid monomers and initiator solution, mixing evenly, taking the mixture as base solution, heating up to initiate polymerization, keeping stirring, dripping the mixture of the water soluble and oil soluble acrylic acid monomers and the initiator solution, reacting, thus preparing the anode aqueous binder of the lithium ion battery. According to the anode aqueous binder and the preparation method of the invention, the problems that the anode aqueous binder of the lithium ion battery is high in viscosity and low in dispersion efficiency are solved; and the anode aqueous binder of the lithium ion battery prepared by the invention is low in viscosity and dosage, has excellent dispersion performance in electrode materials such as graphite and has excellent battery capacity exerting performance and cycle performance.

The invention provides an air conditioning system of an oxygen cabin-type gymnasium and a working method thereof. An oxygen cabin-type gymnasium system comprises the oxygen cabin-type gymnasium, a central air conditioner fresh air supply general air conduit, an air source purifying system, an air degerming and filtering device, oxygen producing equipment, oxygen supply equipment, a carbon dioxide lower suction system and a negative oxygen ion generator. When the oxygen content measured by an oxygen measurer in the gymnasium is not more than 22%, the oxygen producing equipment starts working and supplies oxygen to the gymnasium, when the oxygen content measured by the oxygen measurer in the gymnasium is not less than 30%, the oxygen producing equipment does not work, when the CO2 content measured by a carbon dioxide meter in the gymnasium is not more than 3%, the carbon dioxide lower suction system does not work, and when the CO2 content measured by the carbon dioxide meter in the gymnasium is more than 3%, not less than 5% and not less than 6%, the weak grade, the intermediate grade and the strong grade of an exhaust fan in the carbon dioxide lower suction system work respectively. The invention has the following advantages of reasonable structure, simple operation steps, economic cost and strong practicability, and completely changes the air quality in the gymnasium so as to change the body function of a sporter.

The invention discloses an icon batch processing method and device and a mobile terminal, and relates to the technical field of a terminal. The method comprises the following steps of detecting a track formed by continuous sliding of a user on a current screen under the icon management mode opening condition; determining an icon to be operated in the icon passed by the track; executing the corresponding target operation on the icon to be operated according to the terminal type of the track. Therefore the problems of complicated operation steps, many interaction processes and low icon management efficiency caused by icon selection and target selection operation respectively through multi-gesture operation by a user are solved. The beneficial effects of realizing the batch processing operation on the icon through one-step sliding operation, simplifying the operation steps and the interaction process, and improving the icon management efficiency are achieved.

The invention provides a regulation and preparation method and application of multicolor fluorescent carbon dots. The preparation method of the fluorescent carbon dots comprises the steps that p-phenylenediamine with the certain mass is dissolved into secondary water, and subjected to ultrasonic blending, or ultrasonic blending is conducted after pH value of the solution is conditioned; the solution is transferred into a hydrothermal reaction still and reacts for 8-10 h at the temperature of 200-220 DEG C, the product is cooled to be at the room temperature and centrifugalized, the supernatantliquid is taken and subjected to dialysis treatment, and a pure carbon dot water solution is obtained; and the carbon dot water solution is freeze-dried, and the different fluorescence emitting carbon dots are obtained. The operation steps are simple, and the raw material does not need to be treated or modified through a surface passivation agent. The obtained carbon dots have the good solubilityand dispersibility in the water solution. The prepared carbon dot quantum yield is high, taking rhodamine B (the quantum yield in ethyl alcohol is 89%) as the reference substance, the quantum yield of the prepared carbon dots is usually between 7.4% and 13.6%, and the prepared fluorescent carbon dots can be applied to removal of free radicals and cell imaging.

The invention provides a default contact number updating method and a terminal. The method comprises that: the terminal receives a contact request, and acquires contact information, wherein the contact information comprises a target contact and a contact issuing time; and the terminal sets a number, contacted for the most times under predetermined conditions by the terminal, in all the numbers of the contact as a default number of the target contact, wherein the predetermined conditions comprise contact issuing in a time group of the contact issuing time. By the method and the terminal, the accuracy of the automatically updated default number is improved, and the user experiences are improved.

The invention discloses an alga sort classification identification method based on a Raman spectroscopy technique. The alga sort classification identification method comprises the steps as follows: a plurality of samples of the same alga sort are taken, each sample is living alga liquid of the current alga sort, and the Raman spectroscopy original information about the each sample is obtained by adopting a Raman spectrograph; the acquired Raman spectroscopy original information is preprocessed to obtain a corresponding preprocessing spectral graph, and main factors are abstracted from each preprocessing spectral graph by adopting the partial least squares; the alga sort is exchanged, and main factors corresponding to different alga sorts are obtained; a BP nerve network model is established via taking the main factors of all the alga sorts as the input and taking the classification of the alga sort corresponding to the each main factor as the output; a living alga liquid to be identified is taken to acquire the main factors of the living alga liquid to be identified, and input the main factors into the BP nerve network model, and the alga sorts contained in the living alga liquid to be identified are obtained. The alga sort classification identification method achieves quick and accurate classification of alga sorts based on the Raman spectroscopy technique, greatly simplifies operation steps and shortens detection time.

The invention discloses a method for measuring hyperpressure of flammable gas explosion shock waves. The method includes placing a horizontal track device in an explosion case; arranging a spherical reference object on horizontal tracks; filling flammable gas with certain concentration into the explosion case; igniting the gas; recording a dynamic process of explosion of the flammable gas by a high-speed camera; analyzing via ProAnalyst kinetic analysis software to obtain acceleration of the spherical reference object under the action of the shock waves; and measuring the hyperpressure of the flammable gas explosion shock waves by using the Newton's second law. The Newton's second law and the characteristic of high-speed analysis of the high-speed cameral are sufficiently utilized, so that the hyperpressure of the flammable gas explosion shock waves is measured via physical principles, and the method has an important guiding significance for preventing and controlling actual flammable gas explosion disasters. Besides, the method has the advantages that a device is simple in structure, operation steps are simple, a measurement result is visible and precise, and closely reflects the actual condition, and the method is easy to popularize.

The invention discloses a method for preparing platinum nano-porous electrode by electrodeposition, which pertains to the technical field of material preparation and electrochemical detection. The method includes that: a layer of platinum alloy is deposited on a substrate of a working electrode by electrodeposition, and then the substrate is carried out inverse alloying by electrochemical etching, so as to form the platinum nano-porous electrode. The method of the invention has the advantages that: a high quality platinum nano-porous electrode can be obtained, with the surface area improved by over 500 times than that of a planar electrode and has good catalytic effect, which can completely satisfy the requirements of measuring glucose without enzyme; the preparation steps of the electrode is simple, with small quantity of reagent, low cost and easy operation; and the operation can be conducted under normal temperature, which has no danger of high temperature and is safe and environment protective.

The invention belongs to the technical field of video monitoring, and discloses a method and a device for binding a user account with monitoring equipment in a video monitoring system. The method comprises the following steps that: a user scans a two-dimensional code on monitoring equipment through a mobile terminal to obtain an activation code of the monitoring equipment, and carries the activation code to transmit a download request to a management server; the management server generates an exclusive mobile monitoring client installation package for the mobile terminal; the mobile terminal downloads and installs the installation package, and registers and logs in the management server; the management server binds an equipment serial number with the user account according to the equipment serial number of the monitoring equipment in login information, generates a monitoring equipment name, and issues the generated monitoring equipment name to the mobile terminal; and the mobile terminal performs video monitoring service operation according to the issued monitoring equipment name and the IP (Internet Protocol) address and port number of the corresponding monitoring equipment. The invention further discloses a device corresponding to the method. Through adoption of the method and the device, the operation steps of the user are simplified, and safe and accurate binding of the user account with the monitoring equipment is realized.

The invention discloses a method for separating and purifying chlorogenic acid from eucommia bark leaves, which comprises the following steps of: extracting eucommia bark plant leaves serving as raw materials at the temperature of between 40 and 70 DEG C for 15 to 40 minutes by using 20 to 80 volume percent aqueous solution of a strongly polar organic solvent as an extractant with the aid of microwaves with the power of 300 to 800W, filtering extract, and drying to obtain a eucommia bark leaf flavonoid crude product, wherein the material-to-liquid ratio of the raw materials to the extractant is 1g:(10-50)mL; and performing high-speed countercurrent chromatographic separation and purification on the eucommia bark leaf flavonoid crude product by using ethyl acetate, n-butanol and water in avolume ratio of (3-4):1:(4-5) as a solvent system to obtain the chlorogenic acid. The invention has the main advantages that: operating steps are simple, the equipment type is single, the production period is short, product purity is high, and the method has high application value and good social and economic benefits.

The invention discloses an NT-ProBNP detection kit. The NT-ProBNP detection kit comprises a calibrator, a cleaning solution, a substrate solution, a pretreatment solution, an enzyme conjugate workingsolution and a magnetic bead conjugate working solution; the pretreatment solution contains pyridine, the enzyme conjugate working solution contains NT-ProBNP antibody labeled by enzyme, and the magnetic bead conjugate working solution contains magnetic beads labeled by the NT-ProBNP antibody. The NT-ProBNP detection kit can accurately measure NT-ProBNP in a whole blood sample, the lowest limit detection of the kit is 20 pg/ml, the linearity range is 20-5,000 pg/ml, the detection sensitivity is high, the linearity range is wide, and the result is accurate. The invention further discloses a using method of the NT-ProBNP detection kit. The NT-ProBNP detection kit is simple in using step, the detection time of an NT-ProBNP is shortened, and quick and sensitive detection of the NT-ProBNP is achieved.

The invention relates to a method for preparing the silicane coupling nanometer magnetic compound ferriferrous oxide. First dissolving the divalent and trivalent ferric salt in the water; protected by the inert gases, adding alkali solution to alkalescence; heating and mixing to attain the nanometer ferriferrous oxide particle; adding the diffusion solvent and silicane coupling agent to be heated and mixed to attain the final product. The invention can be used in the detection of left matter of environment last contamination. The inventive method has simple process, lower cost, and the product has uniform distributed nanometer magnetic compound ferriferrous oxide, and when it is used in the detection of left matter of environment last contamination, it has better repeating property, and the material can be recycled.

The invention discloses a method for management, synchronization and backup of a data encryption key. The method comprises the steps that an encryption key of data is generated through encryption equipment and presented in the mode of a two-dimensional code, the encryption equipment processes the data by using a stored key, acquired ciphertext data is uploaded to a cloud server so as to realize sharing of the ciphertext data, and reading equipment requiring to carry out decryption on the data acquires a decryption key of the encrypted data through scanning the two-dimensional code of the encryption key in the encryption equipment and carries out decryption on the data. The invention further relates to a system for management, synchronization and backup of the data encryption key. Simple key management is realized through scanning the two-dimensional code. The invention also relates to a device for management, synchronization and backup of the data encryption key, which comprises the encryption equipment, and reading equipment and the cloud server. The method, the system and the device disclosed by the invention have the beneficial effects of simple operation, high safety, and abilities of realizing shared key management among multiple devices and printing backup of key files, and preventing problems such that the files cannot be opened because of loss of the key and the like.

The invention discloses an awakening method and an awakening device of a display screen, which belong to the field of electronic technologies. The awakening method can be applied to a dual-screen terminal which comprises a main body, a main screen positioned on the front side of the main body, and a secondary screen positioned on the back side of the main body. The awakening method comprises the steps of: receiving a screen awakening instruction; detecting an included angle between the main body of the dual-screen terminal and the horizontal plane according to the screen awakening instruction; determining one of the main screen and the secondary screen to be a target display screen according to the included angle; and awakening the target display screen. By adopting the awakening method and the awakening device, the appropriate display screen can be awakened on the basis of the included angle between the terminal main body and the horizontal plane; and compared with the method of awakening the main screen in the related technologies, the operation steps of awakening the display screen is simplified, the flexibility of display screen awakening operation is improved, and the user experience is improved. The awakening method and the awakening device are used for awakening the display screen.

The invention relates to a picture synthesis method based on a generative adversarial network, which is used for carrying out feature extraction and fusion on pictures in different domains to generatea new picture, and comprises the following steps of firstly collecting and sorting picture samples, and grouping the picture samples to ensure that each group of pictures has the same feature; then constructing and training an adversarial network, and initializing network parameters; then selecting an appropriate loss function and an optimization method; then transmitting the samples into the generative adversarial network to start training; and finally properly adjusting the network parameters according to the training result, so that a better result is expected to be obtained. According tothe invention, the image content is synthesized, a new image is generated, manual operation is simplified, and the working efficiency is improved.

The invention relates to a spectral reflectivity measuring device, which comprises an optical unit, a controlling unit and an ultrasonic ranging unit. Four optical transmitting channels are arranged in the optical unit, two upper channels adopt a cosine scatterer as an optical window, and two lower channels adopt a K9 material optical glass window. The optical window, an optical filter and a plano-convex lens are arranged at one end of the optical unit body, a sealing gasket is arranged on the both sides of the optical filter and the plano-convex lens, and a photosensor is arranged at the focal point of the other end of the plano-convex lens of the optical unit body. The controlling unit comprises a sensor, an amplifier, a digital/analog converter, a single-chip microcomputer, a U disk, a liquid crystal display and a keyboard, etc. The ultrasonic ranging unit consists of an ultrasonic sensing module based on the piezoelectricity principle. The invention achieves that the reflected light of the plant canopy and the radiating light of the sun are measured synchronously, the operational procedure of the measurement is simplified, and the measurement height is kept consistent automatically.

A preparation method of small-grain low-silica-content X zeolite includes mixing silicon-containing compound, sodium hydroxide, water and sulfuric acid solution or water soluble sulfate, stirring and adding aluminum-containing compound to obtain gel, adding the directing agent to the gel to obtain the mixture with the molar composition of (2.5-5.0)Na2O:Al2O3:(2.4-3.0) SiO2:(0.5-2.0)SO4<2->:(80-200)H2O, standing and crystallizing at 80-120 DEG C for 0.5-3.0 hours, water washing, filtering and drying. The obtained X zeolite has a crystal grain of 0.2-1.2 Mum, the molar ratio of silica/alumina is 2.07-2.3, and the crystallinity is more than 95%.

The present invention discloses a novel method for preparing cilastatin acid. Under a strongly acidic condition, (E)-7-chlorine-((S)-2,2-dimethyl cyclopropane amido)-2-heptenoic ethyl ester in a mixed liquid which contains (Z)-7-chlorine-((S)-2,2-dimethyl cyclopropane amido)-2-heptenoic ethyl ester and (E)-7-chlorine-((S)-2,2-dimethyl cyclopropane amido)-2-heptenoic ethyl ester is directly isomerized to form a reaction liquid that contains pure (Z)-7-chlorine-((S)-2,2- dimethyl cyclopropane amido)-2-heptenoic ethyl ester, and then pure (Z)-7-chlorine-((S)-2,2- dimethyl cyclopropane amido)-2-heptenoic ethyl sodium is obtained to prepare cilastatin acid. The method has the advantages that the product is high in yield and good in purity; the preparation process consumes less energy, and the like.

The invention relates to the technical field of agricultural machine intelligentization and provides an operation vehicle travel deflection detection and adjustment method and system. The method includes the following steps that the navigation driving state of an operation vehicle navigation assisting automatic driving system is detected; when the automatic driving system is in a navigation pause driving state, the current travel deflection amount of an operation vehicle is calculated according to positioned coordinates of the current position and an original operation target track of the operation vehicle, and then the operation target track of the operation vehicle is calculated and planned again; and when the operation vehicle navigation assisting automatic driving system is restarted, operation navigation is conducted according to the operation target track which is calculated and planned again. Therefore, the travel deflection adjustment operation steps of a user are simplified, the operation efficiency is improved, and the functions of an original operation vehicle navigation assisting automatic driving system are completed.

Disclosed are a data processing system and a data processing method. The data processing system comprises a mobile terminal, a server and a vehicle-mounted end, wherein the mobile terminal sends data information to the server, and the server stores the received data information, identifies data request information from the data information, generates corresponding interaction information according to the identified data request information, and sends the interaction information to the vehicle-mounted end. According to the data processing system and the data processing method, a user can directly receive the interaction information sent by the server after the vehicle-mounted end is started, other settings do not need to be carried out on the vehicle-mounted end, and therefore operation procedures of the user are simplified, and experience of the user is improved.

The invention provides a testing device and an automatic testing method thereof. The testing device is used for testing a circuit board to be tested. The testing device comprises a mainboard, a detection unit and a control circuit, wherein the detection unit is used for detecting whether the circuit board to be tested is in a preset position or not; if the circuit board to be tested is in the preset position, providing a detection signal by the detection unit; and coupling the control circuit to the detection unit and the mainboard and controlling the mainboard to start up by delaying a preset time according to the detection signal so as to test the circuit board to be tested.

The invention discloses a method for WIFI (Wireless Fidelity) network matching and binding equipment and a user. The network matching of the equipment and a process of binding the equipment are combined together, so that operation steps of the user are simplified; a session identifier code needed by binding is transmitted at a network matching phase; the network matching success rate is improved and user experience is improved.

The invention belongs to the fields of nano/micron material preparation technology and hydro-thermal synthesis technology, and particularly relates to a method for preparing a nano-sheet assembled bismuthyl bromide superstructure by adjusting and controlling a surfactant. The method comprises the following steps: using bismuth nitrate, sodium bromide or hexadecyl trimethyl ammonium bromide as a reactant, adding PEG4000 or PVP4000 as an adjusting and controlling agent, using ethanediol as a solvent, preparing a precursor solution under ultrasonic agitation, and moving the precursor solution into a hydro-thermal reaction kettle in a packing ratio of between 60 and 80 percent; putting the hydro-thermal reaction kettle filled with the mixture into a box-type resistance furnace, heating the kettle to a temperature of between 90 and 150 DEG C, keeping the temperature for 2 to 48 hours, taking the kettle out of the furnace, and cooling the kettle to the room temperature naturally; and washing and centrifugally separating the mixture in the kettle to obtain the required product. The method has the advantages of simple process, easy construction of a whole preparation system, simple and convenient operation, easily controlled condition, low cost, easily controlled product shape and size, high purity, good crystallinity and convenient processing of the product, and is suitable for large scale industrial production.

The invention relates to a chirality assembling structure construction method formed by a gold nanorod side-by-side assembly and sulfydryl-containing chiral molecule and a method for detecting copper ions with high sensitivity by using Plasmon circular dichroism signal. After adding the sulfydryl-containing chiral molecule in the nanorod side-by-side assembly, the chiral molecule is adsorbed on the gold nanorod rod surface by forming gold-sulphur bond to twist the gold nanorod rod and form PCD signals. Copper ions can catalyze and dissolve oxygen and oxidize the sulfydryl-containing chiral molecule to form disulphide; as the latter is weak in adsorption on the gold nanorod rod, the chiral assembly PCD signals are changed. By utilizing the principle, the pmol-magnitude copper ions are measured by establishing the relationship between the copper ions to be tested and the chiral assembly structure PCD signals.

The invention provides and relates to the technical field of plant tissue culture, and provides a tissue culture rapid propagation method of polygonatum multiflorum. The method sequentially comprisesthe following steps of performing sand storage; performing soaking by warm water being 35 to 40 DEG C; performing gibberellin treatment; performing pretreatment on the polygonatum multiflorum seeds soas to break the seed dormancy; inoculating the pretreated seeds into a seed cluster bud inducing culture medium; directly inducing the seeds into cluster buds, wherein the seed cluster bud inducing culture medium is prepared from 1.5 to 2.5mg/L of MS culture media 6-BA, 0.5 to 1.5mg/L of GA3, 6.5 to 7g/L of agar and 30 to 35g/L of sucrose, and the pH value is 5.5 to 6.0; dividing the cluster budsand performing propagation culture so as to expand the cluster bud quantity; performing rooting culture and domestication transplanting to obtain polygonatum multiflorum stock seedlings. The method provided by the invention has the advantages that the dormancy of the polygonatum multiflorum seeds can be effectively broken; the seed germination stage is shortened to five months; the effects of short propagation period and germination rate improvement by 85 to 90 percent are achieved.

The invention discloses a preparation process of 2-naphthylamine-3,6,8-trisulfonic acid. The preparation process of 2-naphthylamine-3,6,8-trisulfonic acid comprises the following steps: 1, adding 2-isonaphthol into sulfuric acid for carrying out sulfonation reaction, and thus obtaining a sulfonated product after the reaction is completed; 2, adding the sulfonated product into the mixed solution of ammonium hydroxide and sodium chloride for salting out, and thus obtaining salt mixture and mother solution; 3, under the existence of ammonolysis catalyst, carrying out the ammonolysis reaction between the salt mixture and the ammonium hydroxide, and after the reaction is completed, acidizing, dehydrating and drying to obtain amide; and 4, adding the amide into fuming sulphuric acid for carrying out sulfonation reaction, and after the reaction is completed, obtaining the 2-naphthylamine-3,6,8-trisulfonic acid by aftertreatment. According to the preparation process, a one-step method is employed for salting-out and one-time ammoniating, so that the operating steps are simple, the problem of wastewater treatment in traditional technology is solved, meanwhile the unit consumption of 2-isonaphthol, as the material, is reduced, and the production cost is also reduced.

The invention discloses a preparation method of aminated graphene, particularly a preparation method and application of aminated graphene, belonging to the field of environmental functional materials. The preparation method comprises the following steps: dissolving graphene oxide powder in a dimethylformamide solution, respectively adding ethylenediamine and an N,N'-dicyclohexylcarbodiimide tetrahydrofuran solution, and reacting to obtain the monoatomic-lamellar-structure aminated graphene. The preparation method is simple, and has the advantages of mild preparation reaction and high safety. The obtained aminated graphene is a monoatomic lamellar structure, has the advantages of high amination degree and higher nitrogen content than the products of other preparation methods, is beneficial to adsorbing heavy metal ions in wastewater, and has favorable application prospects in the aspect of heavy metal wastewater treatment.

The invention relates to a ZSM-5/silicalite-1 core-shell molecular sieve for a shell layer with oriented epitaxial intergrowth. The ZSM-5/silicalite-1 core-shell molecular sieve mainly solves the disadvantage of waste of using raw materials and a template agent of the shell layer due to multiple repeated growth for forming a compact shell layer in a conventional core-shell molecular sieve preparation technology; meanwhile, the ZSM-5/silicalite-1 core-shell molecular sieve solves the problems of poor mechanical strength of the shell layer and poor activity and stability of a catalyst caused by the phenomenons of non-epitaxial intergrowth, non-oriented growth, nonuniformity and the like of the shell layer. According to the invention, after pretreatment of a core-phase zeolite material with an alkalescent aqueous solution, the core-shell molecular sieve containing the compact shell layer with epitaxial intergrowth is prepared in a molecular sieve crystallization system of the shell layer under the condition of proper reaction; the core-shell molecular sieve is effectively applied in shape-selective disproportination of aromatic hydrocarbon, shape-selective transalkylation and shape-selective methylation reaction so as to generate a large number of useful paraxylene isomers; and through the allocation of composition of a core and a shell, the catalyst has the characteristics of high catalytic activity, large processing amount of the aromatic hydrocarbon, high mechanical strength of integration, low application loss and high selectivity to paraxylene products, and can be applied in industrial production with higher efficiency.