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209 results about "Targeted screening" patented technology

Aircraft surface damage area segmentation method based on adaptive multi-modal fusion

The invention relates to an aircraft surface damage area segmentation method based on adaptive multi-modal fusion, belongs to the technical field of nondestructive testing, and solves the technical problem of low segmentation precision of an aircraft skin curved surface falling damage area. Obtaining a grey-scale map, a depth map and a point cloud map of the aircraft surface damage skin; synthesizing the grey-scale map, the depth map and the point cloud map, and performing preprocessing, feature extraction, feature conversion, image display and projection and weighted fusion on the synthesized grey-scale map, the synthesized depth map and the synthesized point cloud map to obtain a total edge probability map of skin damage; and performing targeted screening, continuity detection, connectivity detection, convex hull construction, marking and skin falling damage area division on the total edge probability graph. The method is used for aircraft skin health monitoring, maintenance guarantee and operation and maintenance.
Owner:AIR FORCE UNIV PLA

Feed pump fault diagnosis system

The invention discloses a water feed pump fault diagnosis system, which belongs to the field of data analysis and is characterized in that real-time operation data of a water feed pump are acquired by adopting a synchronous acquisition strategy, an operation database is constructed, and when a data record is newly added, detection and self-adaptive judgment are performed to determine an early warning decision; when abnormal early warning of the water feeding pump is detected, screening a fault assessment set for fault identification based on the operation database, and performing information fusion on fault assessment data to obtain a fault assessment feature set; and performing comprehensive time sequence analysis on the preliminary fusion data of each fault evaluation subset to obtain a key part fault evaluation score so as to judge a fault, for the key part judged as the fault, obtaining a fault source by constructing a time axis, and constructing a fault propagation path in combination with a correlation coefficient matrix. The technical problems of synchronization and exception handling during collection of multi-source information, targeted screening and effective integration during fusion, and discrimination and traceability during fault diagnosis are solved.
Owner:CANAVI (NANJING) SMART TECH CO LTD +2

Semantic matching between a source screen or source data and a target screen using semantic artificial intelligence

Semantic matching between a source screen or source data and a target screen using semantic artificial intelligence (AI) for robotic process automation (RPA) workflows is disclosed. The source data or source screen and the target screen are selected on a matching interface, semantic matching is performed between the source data / screen and the target screen using an artificial intelligence / machine learning (AI / ML) model, and matching graphical elements and unmatched graphical elements are highlighted, allowing the developer to see which graphical elements match and which do not. The matching interface may also provide a confidence score of the individual matches, provide an overall mapping score, and allow the developer to hide / unhide the matched / unmatched graphical elements. Activities of an RPA workflow may be automatically created based on the semantic mapping that can be executed to perform the automation.
Owner:UIPATH INC

Visual non-target metabonomics origin tracing method for strong liquor

The invention relates to the field of strong wine detection, and discloses a strong wine visual non-target metabonomics origin traceability method, which comprises the following steps: firstly, collecting strong wine original data, digitizing and outputting the collected strong wine original data to obtain strong wine output data; performing preliminary analysis by using a clustering analysis method to obtain first analysis data; performing secondary analysis on the first analysis data by using a principal component analysis mode to obtain second analysis data; and finally analyzing the second analysis data by partial least square discriminant analysis or orthogonal partial least square discriminant analysis, and screening, comparing and identifying the characteristic compounds to obtain the non-target metabonomics origin traceability place of the strong wine. According to the method, the problems that a non-target metabonomics traceability technology easy to visually display does not exist in the prior art, and a standardized operation instruction integrating efficient pretreatment, non-target screening, rapid traceability, accurate confirmation and visual display does not exist are solved.
Owner:INSPECTION & QUARANTINE TECH CENT SHANTOU CIQ

Image editing method and device, equipment and storage medium

The invention relates to the technical field of image enhancement, in particular to an image editing method, device and equipment and a storage medium, and the method comprises the steps: obtaining original input data containing an original image and corresponding scene structure information, carrying out the editing region screening processing in the original image based on the scene structure information, and obtaining a target editing region, obtaining a pre-training diffusion model, performing obstacle editing processing on the original image in combination with a preset image editing strategy and a target editing area to generate an initial enhanced image, performing consistency optimization on the initial enhanced image according to the scene structure information to obtain a target enhanced image, and generating annotation information based on the target enhanced image, and finally, carrying out quality screening processing on the target enhancement graph and the annotation information to obtain target screening data, and carrying out barrel division evaluation processing on the target screening data to obtain target enhancement data, thereby enriching training data and solving the problem of insufficient coverage of special-shaped obstacles in traditional data enhancement.
Owner:JIHUA LAB

Waste concrete recycled aggregate classified screening monitoring method and device

The invention provides a waste concrete recycled aggregate classification screening monitoring method and device, and the method comprises the steps: analyzing the roughness degree of an aggregate surface according to initial state description, calculating a surface fluctuation height difference value and a texture direction, extracting surface texture features from image scanning data, and determining the roughness grade of the aggregate surface; measuring three-dimensional size parameters of the aggregate in combination with a laser ranging technology to obtain aggregate particle size distribution data, carrying out statistical analysis processing on aggregate particle size changes, and comprehensively judging the dispersion degree of particle size distribution in combination with a surface fluctuation height difference value, a texture direction and a roughness grade; layered screening is conducted on aggregate through target screen mesh aperture configuration, aggregate adhesion friction data are collected in real time in the screening process, and the screening efficiency is obtained by combining the throughput of aggregate with different particle sizes in unit time.
Owner:SHENZHEN LVJINLONG ENVIRONMENTAL PROTECTION TECH CO LTD

Targeted screening method and application of xanthine oxidase inhibitor in radix puerariae

The invention discloses a targeted screening method and application of a xanthine oxidase inhibitor in radix puerariae, and belongs to the technical field of medicinal chemistry. A surface chemical exchange method is carried out on xanthine oxidase through a ligand fishing technology, ligands of active groups of xanthine oxidase are modified to the surfaces of magnetic metal nanoparticles, the magnetic metal nanoparticles and a to-be-separated solution are incubated together, and then specific components with the xanthine oxidase inhibiting effect are successfully screened out through a UPLC-Q-TOF-MS / MS technology. The combination of the active component and the XOD active site is verified through molecular docking simulation to confirm that the active component is an effective inhibitor. The invention provides a reliable basis for further clinical research and development of drugs for treating hyperuricemia, and has a wide application prospect.
Owner:SHAANXI UNIV OF SCI & TECH

Pump room scene abnormal state recognition system and method based on video monitoring

The invention provides a pump room scene abnormal state recognition system and method based on video monitoring, and relates to the field of monitoring or monitoring activities, in particular to the field of space perception. The system comprises a synchronous trigger device which is used for synchronously triggering the collection of video data and audio data in a pump room in the same monitoring time interval; and the state identification device is used for intelligently identifying a pump room scene abnormity type by adopting an intelligent scene abnormity identification model on the basis of basic contents obtained by analyzing the video data in the pump room and the audio data in the pump room. According to the invention, in order to solve the technical problem that the recognition precision and efficiency of various specific pump room scene abnormal states cannot be considered at the same time, different intelligent scene abnormal recognition models can be designed for different pump room scenes and multi-modal basic contents screened in a targeted manner are introduced; and various specific pump room scene abnormal state identification is completed, so that the technical problem is solved.
Owner:LIANYUNGANG QINGYUAN TECH CO LTD

An unsupervised time series anomaly detection method

The application discloses a kind of unsupervised time series anomaly detection methods, the method includes obtaining historical time series data, according to the correlation of historical time series data and target screening characteristic variable, according to characteristic variable constructs instance anomaly detection task historical time series data;To instance anomaly detection task historical time series data relevant field adopts rolling statistical characteristic strategy, constructs instance anomaly detection task historical time series data model;Instance anomaly detection task historical time series data model is input into self-encoding framework after batch processing, after three times coding, three times decoding obtains reconstructed instance anomaly detection task historical time series data module;Instance anomaly detection task historical time series data module is compared and analyzed with reconstructed instance anomaly detection task historical time series data module, obtains loss time series dataset;Decision tree model is constructed, and each sample of loss time series dataset is scored, and final anomaly detection result is obtained according to score.The application can improve the ability and efficiency of time series data anomaly identification.
Owner:BEIJING WISEDA TECH CO LTD

A combine harvester with differentiated processing of material function

ActiveCN120615476BGuaranteed screening effectlow costMowersThreshersAgricultural engineeringThreshing
The application discloses a combine harvester with a material differentiation processing function, which comprises a walking chassis, a ploughing and harvesting assembly, a material conveying assembly and a threshing and cleaning assembly arranged in sequence from front to back on the walking chassis; the threshing and cleaning assembly comprises a threshing device and a cleaning device arranged in an up-down mode; the cleaning device comprises a sieve body and a driving main shaft for vibrating the sieve body; the number of the sieve bodies is at least three, and all the sieve bodies are closely arranged in the axial direction of the driving main shaft; a driving member is connected between the driving main shaft and each sieve body, and the specifications of the driving members connected with the sieve bodies at different positions are different, so that the vibration parameters of the sieve bodies at different positions are different. In the application, the structural design of the cleaning device can fully meet the distribution characteristics that the materials falling from the threshing cylinder of the threshing device are more on both sides and less in the middle, and targeted screening processing of the differentially distributed materials is realized.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI

Industrial park intelligent electric meter data application method

The invention relates to an industrial park intelligent electric meter data application method. The method comprises the following steps: executing each training action on a deep neural network at an intelligent electric meter of an industrial park to obtain the deep neural network after executing each training action, and outputting the deep neural network as an AI power interruption identification model corresponding to the industrial park; and intelligently identifying whether the industrial park has the power supply interruption accident of the power supply cable in the future time segment or not at the intelligent electric meter of the industrial park according to the AI power interruption identification model corresponding to the industrial park. According to the invention, the AI power interruption identification model designed for the customized structure of the industrial park can be adopted at the intelligent electric meter of the industrial park, and whether a power supply interruption accident of a power supply cable occurs in the industrial park in a future time segment or not can be intelligently identified according to multiple times of basic information screened in a targeted manner; therefore, key foreseeing information is provided for safety management of power supply cables in industrial parks during typhoons.
Owner:NANJING WANG HUI CHUANG TECHNOLOGY CO LTD

Method and device for screen projection in vehicle

A method for screen projection in vehicle includes displaying first screen projection data sent from connected first mobile terminals in sub-areas on a display screen; in response to receiving a connection request from a second mobile terminal, establishing a connection with the second mobile terminal; receiving second screen projection data sent from the second mobile terminal; determining whether any target screen projection data having a same data type as the second screen projection data exists in the first screen projection data; in response to the target screen projection data being determined, assigning a target sub-area corresponding to the target screen projection data to the second mobile terminal to project the second screen projection data sent from the second mobile terminal; and in response to no target screen projection data being determined, adding a new sub-area on the display screen to screen project the second screen projection data.
Owner:PATEO CONNECT (NANJING) CO LTD

Report generation method, device, equipment and storage medium

The present disclosure provides a report generation method that can be applied to the financial and database fields. The report generation method includes: obtaining a report file generation request, the generation request including a target screening condition array, the target screening condition array including a target screening condition and a target screening value, and the report file corresponding to multiple screening condition arrays; determining target identification information of the report file based on the target screening condition array, the target identification information corresponding to basic configuration information, and the basic configuration information including a first initial query statement corresponding to the target identification information; verifying the target screening condition array; if the verification result indicates that the target screening condition array meets the verification rules, generating a target query statement based on the target screening condition array, the target identification information, and the first initial query statement; performing a data query based on the target query statement, and outputting a report file. The present disclosure also provides a report generation device, equipment, storage medium, and program product.
Owner:CHINA CONSTRUCTION BANK

Screening method for synchronously and rapidly analyzing new pollutants through single sample injection

The invention discloses a screening method for synchronously and rapidly analyzing new pollutants through single sample injection, and relates to the technical field of environment screening. According to the invention, a non-targeted screening, targeted screening and quantification technology for one-time pretreatment of multiple compounds in a water sample based on an electrostatic field orbitrap high-resolution gas chromatograph-mass spectrometer and synchronous and rapid analysis of the compounds by single sample injection under the same instrument condition is realized. Compared with the existing method for independently carrying out non-targeted screening, targeted screening and quantitative analysis on the compounds, the method has the advantages that the sensitivity of non-targeted screening is improved, the risk that low-concentration specific pollutants cannot be detected by non-targeted screening is reduced, and the defects that in targeted screening and quantitative analysis, the spectrogram information of the compounds is incomplete, and the detection sensitivity is low are reduced. The risk that misjudgment and false positive problems easily occur is solved, and the problem that non-targeted screening is incompatible with targeted screening and quantitative analysis is solved. Through the method, the analysis time can be effectively shortened, the analysis efficiency can be improved, and the analysis cost can be saved.
Owner:四川省生态环境监测总站

Method for high-throughput screening of alpha-glucosidase inhibitor in boxthorn leaves through multi-shell MOF immobilized enzyme

The invention provides a method for high-throughput screening of an alpha-glucosidase inhibitor from boxthorn leaves based on a multi-shell MOF immobilized enzyme, and aims to overcome the bottlenecks of low throughput, tedious operation, high cost and the like of a traditional screening method. The core process of the method comprises the following steps: preparing a boxthorn leaf sample solution and pre-evaluating the in-vitro alpha-glucosidase inhibitory activity; a multi-shell MOF immobilized enzyme technology is coupled with a UPLC-QTOF-MS / MS technology, so that targeted screening, efficient separation and accurate identification of active components are realized; verifying the alpha-glucosidase inhibitory activity of the target compound; and predicting the binding site of the small molecule compound and the enzyme through a molecular docking technology. The method has the core advantages of high specificity, high sensitivity, high flux, repeated utilization of enzyme receptors and the like by depending on the inherent characteristics of an immobilized enzyme technology, can synchronously screen and identify various inhibitors, effectively integrates the resource advantages of a boxthorn leaf natural product and the high efficiency of a modern high-flux screening technology, and has a wide application prospect. And a key technical support is provided for diversified development of diabetes treatment medicines.
Owner:NINGXIA UNIVERSITY

Method and device for displaying financial data, storage medium and electronic device

The application discloses a financial data display method and device, a storage medium and an electronic device, and relates to the technical field of artificial intelligence. The method comprises the following steps: acquiring N pieces of financial data to be displayed on a target screen, wherein N is a positive integer greater than 1; acquiring first portrait information of a first object, wherein the first object is an object to be used with the N pieces of financial data, and the first portrait information at least comprises attribute information of the first object and preference information of the first object for a screen layout; inputting the first portrait information into a target decision tree model for classification processing, and outputting a screen layout recommended for the first object; and displaying the N pieces of financial data on the target screen based on the screen layout. Through the application, the problem that, in the related art, when financial data is displayed on a screen, the screen cannot preferentially display data information that a user is interested in, and the effect of using the financial data displayed on the screen is poor, is solved.
Owner:INDUSTRIAL AND COMMERCIAL BANK OF CHINA

Transient alarm tracking method and device, terminal equipment and storage medium

The invention provides a transient alarm tracking method and device, terminal equipment and a storage medium, and the method comprises the steps: firstly obtaining an image of a target screen on to-be-tracked equipment; then determining a preset alarm information display area corresponding to the target screen, and performing character recognition on the preset alarm information display area to obtain a character recognition result; and finally, matching the character recognition result with a preset alarm character library, and determining that the to-be-tracked device has a transient alarm under the condition of successful matching. Therefore, the characters in the specific area of the screen of the to-be-tracked equipment are automatically obtained and recognized in a non-intrusive mode, so that the preset alarm information is accurately matched, millisecond-level response is achieved, transient faults which cannot be traced in a traditional mode are effectively captured and recorded, and the accuracy and reliability of equipment diagnosis are improved.
Owner:CHINA GENERAL NUCLEAR POWER OPERATION

A control system based on intelligent multi-screen cooperation

The application relates to the field of screen control, in particular to a control system based on intelligent multi-screen cooperation, which comprises a processing unit, an analysis unit, a load optimization unit and a display optimization unit. The processing unit comprises a plurality of sub-processing modules and is used for processing target videos respectively. The analysis unit is used for determining the display state of each target screen according to a picture misadjustment reference value and a display decline reference value, and determining an optimization mode as load distribution optimization or environment optimization according to a first display state proportion and a first display state aggregation degree. The load optimization unit is used for determining the screen category of the target screen according to an image complexity reference value and a dynamic reference value, and determining an optimization processing mode as task distribution optimization or task order optimization based on a balance coefficient. The display optimization unit is used for determining the environmental light influence state corresponding to each target screen according to an illumination intensity coefficient and an illumination distribution coefficient, and determining whether to adjust the brightness of the target screen according to the environmental light influence state. The application improves the display effect under the control of the multi-spliced screen.
Owner:BEIJING ZHONGYICHENG TECHNOLOGY CO LTD

Screen display method and device, terminal and storage medium

The invention provides a screen display method and device, a terminal and a storage medium, and the method comprises the steps: determining initial display content and an initial screen-on region for displaying the initial display content according to a current notification recognition result of the terminal when a grading screen-on triggering condition of a terminal display screen is satisfied; determining a target display strategy according to a current operation behavior of a user on the terminal display screen, performing corresponding processing on the initial display content and the initial screen-on area according to the target display strategy, and determining target display content and a target screen-on area for displaying the target display content; and controlling the target screen-on area to display the target display content. According to the embodiment of the invention, the corresponding target display content and the target screen-on area are determined according to the notification recognition result and the current operation behavior of the user by setting the hierarchical screen-on trigger condition, so that hierarchical lightening is realized, and the power consumption of equipment can be reduced under the condition that normal use operation is not influenced.
Owner:SHANGHAI DROI TECH CO LTD

Centromere protein CENP-m small molecule inhibitor cenpemlin, and preparation method therefor and use thereof

Provided are a centromere protein CENP-M small molecule inhibitor cenpemlin, and a preparation method therefor and the use thereof. A small molecule compound cenpemlin is obtained by means of analyzing the protein plane information of the fine structures of CENP-M and CENP-L and performing targeted screening. The results of biochemical and cytological experiments all indicate that cenpemlin inhibits the proliferation of cancer cells by means of interfering with the interaction between CENP-M and CENP-L, thereby providing a new compound for analyzing and interfering with the rapid proliferation of cancer cells.
Owner:UNIV OF SCI & TECH OF CHINA

Data processing method, device, electronic device and storage medium

The embodiment of the present invention discloses a data processing method, device, electronic device and storage medium, the method comprising: obtaining original basic data based on a data pointer, and determining target screening data from the original basic data based on at least one indicator item; determining at least one aggregation identifier based on the data content of the target indicator item in at least one indicator item; and updating the historical storage data in the database based on the at least one aggregation identifier and the corresponding target screening data to obtain the target data. The technical solution of the embodiment of the present invention solves the problem in the prior art that when the indicator business requirements change, a large amount of code needs to be modified to implement the function, the system has poor flexibility and maintainability, and leads to high time and labor costs, and realizes the flexible loading of basic data according to the aggregation pointer, thereby achieving the technical effect of saving labor and time costs.
Owner:JD DIGITS HAIYI INFORMATION TECHNOLOGY CO LTD

A wireless screen projection control method and system

The embodiment of the present specification provides a wireless screen projection control method and system, the method comprises: obtaining a screen projection request and user information sent by a user terminal of a request user; determining user position information of the request user based on the user information, wherein the user position information comprises a positioning room and a position confidence; determining a candidate screen projection screen or a target screen projection screen based on the user position information.
Owner:EXANDS INFORMATION TECH CO LTD

Plant rl1 gene regulates broad-spectrum disease resistance and application

PendingCN122344592ABiotechnologyFamily Poaceae
The present application relates to plant RL1 gene regulation broad spectrum disease resistance and application. The present application provides a RL1 down-regulation agent for use in improving plant disease resistance, or for preparing a preparation for enhancing plant disease resistance. The present application also provides a method for improving traits of a plant in the family Poaceae or preparing a plant in the family Poaceae with improved traits, comprising: down-regulating the expression or activity of RL1 in the plant; the improved traits include: improving the disease resistance of the plant. The present application also provides the use of RL1 as a molecular marker for identifying plant disease resistance, or as a molecular marker for targeted screening of plants with disease resistance, and related identification methods, screening methods, etc.
Owner:CAS CENT FOR EXCELLENCE IN MOLECULAR PLANT SCI

Heuristic low-dimensional representation reconstruction method and system based on high-throughput sequencing

The invention relates to the technical field of sequencing analysis, in particular to a heuristic low-dimensional representation reconstruction method and system based on high-throughput sequencing, and the method comprises the steps: screening out cells similar to cells selected by a user from preprocessed sequencing data, and taking an obtained cell list L'as the input of a generator and a discriminator; the generator extracts features from the preprocessed data and the cell list L'by using an encoder and sends the features to a potential space, an original data set is recovered from the features of the potential space by using a decoder, and the potential space is the low-dimensional representation of the original data set; the discriminator performs authenticity and attention evaluation based on the potential space and the cell list L'of the generator, and supervises and guides the low-dimensional representation generated by the generator to be concentrated towards the direction of the cells selected by the user; and performing adjacency graph construction and visualization processing based on the potential space of the generator to obtain reconstructed low-dimensional representation. Required cells can be directionally screened according to research requirements of users, and the directivity problem is solved.
Owner:NANKAI UNIV

Screen projection method, device and electronic device

The present invention relates to a screen projection method, device and electronic device, and to the field of display technology, including: when it is determined that a target screen projection device is in a screen projection mode, before a target application extension associated with a screen projection application completes establishing a first channel connection with a target screen projection device, target screen data to be projected is obtained through the target application extension, and the target screen data to be projected is written into a preset shared memory; the target screen data to be projected in the preset shared memory is transmitted to the target screen projection device through a second channel connection through the screen projection application; after the first channel connection is established, the target application extension is stopped from writing the target screen data to the preset shared memory, and the target application extension is started to directly transmit the obtained target screen data to the target screen projection device through the first channel connection. The adoption of this method can improve screen projection efficiency and enhance user experience.
Owner:HISENSE VISUAL TECH CO LTD

Satellite-borne SAR self-focusing method and system for long-time integral bunching mode, computer and storage medium

The invention discloses a satellite-borne SAR (Synthetic Aperture Radar) self-focusing method and system for a long-time integral bunching mode, a computer and a storage medium, and the method comprises the steps: screening a strong scattering target region in a manner of taking the maximum contrast or maximum power as a target according to the size of a divided grid; a minimum entropy distance alignment algorithm based on a partial frequency spectrum is used to realize distance migration error estimation of a partial region, a mode of combining hamp filtering and polynomial fitting is used to realize full-scene distance migration error estimation, and a minimum entropy phase correction algorithm is used to realize phase error estimation of a partial region. All-scene phase error estimation is realized by combining a Savitzky-Golay filter and a polynomial fitting mode, and unified compensation processing is performed on an original all-scene image by applying all-scene range migration errors and a phase error estimation result, so that all-scene fine focusing is realized. According to the invention, large-scene full-image fine focusing under the condition of over 15 seconds of ultra-long synthetic aperture time can be realized.
Owner:SUZHOU AEROSPACE INFORMATION RES INST

Efficient and environmentally friendly sand screening device control system

The present application belongs to the technical field of equipment control, and particularly relates to a high-efficiency environment-friendly sand and gravel screening equipment control system, to solve the technical problem that the existing method lacks deep understanding and accurate prediction of the internal mechanism of the screening process, and cannot realize the collaborative optimization of multiple key performance indicators such as screening efficiency, hole blocking risk and operation energy consumption. It comprises: a calculation module, which predicts the evolution trend of the hole blocking probability of the screen surface and calculates the transition energy consumption of the particles; a construction module, which constructs a weighted multi-objective optimization function; and a regulation and control module, which is used for real-time regulation and control of the screen parameters of the screening equipment according to the obtained target screen parameter combination. The present application ensures that the particle size distribution of the environment-friendly sand and gravel is highly stable and continuously meets the engineering standards, and improves the product qualification rate.
Owner:SHANGHAI SANME HEAVY MINING MACHINERY CO LTD +1

Display control method and device for media notification, vehicle and storage medium

The invention discloses a media notification display control method and device, a vehicle and a storage medium, and belongs to the technical field of information display. Comprising the steps of obtaining a playing state of a media player under the condition that a media notification is displayed on a target screen; under the condition that the playing state belongs to a first state, based on at least one of the state information of the target equipment, the media information of the target media source and the playing state, the target delay duration is determined, and the first state is a state in which the media player stops playing; and after the target delay duration, if the playing state still belongs to the first state, controlling the media notification to cancel display. Therefore, the display of the media notification is cancelled after the target delay duration, the operation requirement of the user can be fully considered, sufficient operation time is reserved for the user, the display of the media notification is cancelled under the condition that the user does not perform any operation within the target delay duration, and intelligent display of the media notification can be realized.
Owner:GREAT WALL MOTOR CO LTD

Method for non-targeting screening of hydroxyl esterification-derived glucocorticoids in cosmetics by using low-resolution mass spectrometry

The invention discloses a method for non-targeting screening of hydroxyl esterification-derived glucocorticoid in cosmetics by using a low-resolution mass spectrum, which specifically comprises the following steps: adding sodium hydroxide with the concentration of 10 mg / mL into an acetonitrile solvent system under an alkaline condition, and adding a quantitative stabilizer consisting of EDTA (Ethylene Diamine Tetraacetic Acid) and sodium ascorbate into a reaction system, the method comprises the following steps: controlling the reaction time at room temperature to be 1 hour, adding an acetonitrile aqueous solution containing acetic acid to adjust the reaction system to be in an acidic environment and metering the volume, performing hydrolysis deesterification on glucocorticoids derived from different esterification of hydroxyl groups at 21 site and (or) 17 site of a D ring, returning to the state before esterification and derivation, and enabling the product to be stable; furthermore, only one kind of hydroxyl esterification-free glucocorticoid is adopted as a standard substance, and the hydroxyl esterification-derived glucocorticoid in cosmetics can be screened in a non-targeted manner through high performance liquid chromatography-tandem triple quadrupole mass spectrometry.
Owner:大连市检验检测认证技术服务中心