Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

356 results about "Rapid assessment" patented technology

Circular polarized light method and device for determining wall thickness and orientations of fibrils of cellulosic fibres

This invention provides a novel, rapid method and device for determining the relative phase retardation of a multi-layered specimen, which is related to the thicknesses of its layers and walls, and the orientations of its optical axes. An intact wood pulp fibre is a typical multi-layered birefringent specimen. This new method is based on the change of polarization of polarized light that passes through a specimen composed of birefringent layers with different optical axis orientations, such as directions of cellulosic microfibrils oriented differently in various layers of wood fibres. In particular, a novel solution is found to relate the emerging light intensity from an intact wood fibre to the incident light intensity, the wavelength of the light, and the relative phase retardations of various layers and orientations of their cellulosic microfibrils, such as fibril angle, in a circular polarized light system. This new method evaluates the transmitted light intensities of multiple predetermined wavelengths simultaneously to determine the optical and physical properties of a multi-layered specimen being measured. A device for determining the relative phase retardation (retardance) of fibre walls and the fibril angle of intact wood fibres in accordance with the presented invention comprises a light source with well defined multi-wavelengths, an achromatic circular polarized light system, appropriate imaging optics, a multi-channel camera such as a digital color camera that has two or more wavelength (color) detection channels, and an image processing and data analysis system. The measurements take advantage of the birefringence of cellulosic microfibrils, and thus require neither sample preparation nor high resolution optics. Specimen alignment is not required as specimens such as wood fibres are evaluated under circular polarized light. Compared with other methods, this invention is more rapid, accurate, and robust. This method can be automated, and implemented in a fibre flow-through system, thus allowing a rapid assessment of wood pulp fibre properties (on-line in real time).
Owner:FPINNOVATIONS INC

Similarity index: a rapid classification method for multivariate data arrays

InactiveUS20090306932A1Rapid classification and analysisDigital computer detailsRaman scatteringData setSpectroscopy
Similarity Index: a rapid classification method for multivariate data arrays The present invention is directed to a method of determining the similarity between a first multivariate data set and a second multivariate data set. The method is versatile and can be applied to a number of different multivariate data sets, for example, a spectroscopy multivariate data set. In particular, the method may be applied to rapidly assess the similarity between fluorescence spectroscopy multivariate data sets. The method comprises the steps of representing the data of a first and a second multivariate data set in matrix form to yield a multivariate data matrix, wherein each multivariate data matrix has the same dimensions. Subsequently, the magnitude of an additive and subtractive combination of each multivariate data matrix is calculated. The concept of a penalty parameter is introduced to set a detectable limit of variance between said first multivariate data set and said second multivariate data set. The penalty parameter is ascribed a value and is used in combination with the magnitude of an additive and subtractive combination of each multivariate data matrix to determine a similarity value. The determined similarity value indicates the variance between said first multivariate data set and said second multivariate data set.
Owner:THE NAT UNIV OF IRELAND GALWAY

Transient voltage stable on-line assessment method based on WAMS and EMS

The invention relates to a transient voltage stable on-line assessment method based on a WAMS (Wide Area Measurement System) and an EMS, comprising: obtaining WAMS real-time power grid measurement information to determine whether a power grid is disturbed; obtaining the topological structure, parameters and power flow operation information of a current power grid from an EMS when the power grid is disturbed so as to calculate a full admittance matrix concerning load equivalent admittance; according to the WAMS measurement information, running statistics on nodes having a voltage dip exceeding a preset threshold value, obtaining Thevenin equivalent parameters of statistic nodes based on full admittance matrix inversion to be used as an initial value to track Thevenin equivalent parameter identification of the WAMS measurement information and static state voltage stable margin index calculation, and calculating a transient voltage dip acceptability area index; and running statistics on nodes having a power grid node voltage dip exceeding a preset threshold value and having a dip duration greater than a preset threshold value, and determining the occupancy of power grid disturbance transient voltage instability nodes. The method can rapidly and effectively realize the stable and rapid assessment of a transient voltage.
Owner:STATE GRID CORP OF CHINA +2

Rapid online assessment method for wide area measurement power big data quality

The invention discloses a rapid online assessment method for wide area measurement power big data quality, and belongs to the field of power system big data application, and the method comprises the following steps: obtaining the real-time power big data of a wide area measurement system in a given time period; performing fast preprocessing with improved MapReduce parallel K-means clustering algorithm ; carrying out correctness evaluation by adopting a KNN-based fast density peak abnormal value detection algorithm; carrying out integrity, uniqueness, accuracy, consistency and effectiveness evaluation, and designing an evaluation rule Rr (r = 1, 2, 3... n) corresponding to each index according to the evaluation index Ii; determining a weight coefficient Ww of each evaluation index by utilizing an analytic hierarchy process; and counting the data number percentage Ss meeting the evaluation rule Rr (Ii), and calculating a comprehensive evaluation value X of the power big data quality according to the obtained weight coefficient Ww and the detection result Ss. According to the method, the problem of rapid assessment of the quality of the power big data is solved, and the method is basic work of power grid online application based on the WAMS.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

A method for assessing oilpaper insulating aging state on the basis of polarization and depolarization charge differences

The invention belongs to the technical field of electrical equipment insulation diagnosis, and provides a method for assessing oilpaper insulating aging states on the basis of polarization and depolarization charge differences. A polarization and depolarization charge difference can be calculated through detecting polarization currents and depolarization currents of internal oilpaper insulation of electrical equipment; a degree of polymerization of insulation paper insulation states is represented through the polarization and depolarization charge difference of the paper insulation; assessment of insulation states of the oilpaper insulation is carried out; and thus a damaging assessment method for assessing oilpaper insulation through the degree of polymerization is changed into a lossless assessment method in combination with the polarization and depolarization current method and the polymerization degree method. No dismounting is needed for the electrical equipment with oilpaper insulation as an insulating layer, and for example, lossless, accurate and rapid assessment can be carried out on insulation states of the oilpaper insulation inside a voltage transformer or a high-voltage bushing without cover hanging of the voltage transformer or dismounting of the high-voltage bushing, and thus a basis and a reference are provided for detection of insulation aging states and replacing of the oilpaper insulation inside the electrical equipment.
Owner:DALIAN UNIV OF TECH

Indoor simulation/rapid assessment device for comprehensive atmospheric environment corrosion

The invention relates to an indoor simulation/rapid assessment device for comprehensive atmospheric environment corrosion, and belongs to the technical field of indoor simulation/rapid assessment devices for the corrosion of materials. The device comprises a control panel, a main work box, an ultraviolet lamp tube, a lifting mechanism, a temperature control and feedback system, a humidity control and feedback system and a hot and cold air system. The temperature control and feedback system, the humidity control and feedback system, the ultraviolet lamp tube and the hot and cold air system are controlled by the control panel to carry out environmental simulation on a test sample in the main work box. The device is simple in structure, low in manufacturing cost, high in work stability and accurate in test parameter control, not only can simulate the corrosion process of a material component under single conditions, such as constant temperature and constant humidity, alternation of wetting and drying and ultraviolet irradiation, but also can simulate the corrosion behaviors and processes of the material component under the synergistic action of multiple factors, and is particularly applicable to the indoor simulation and rapid assessment of the corrosion under the comprehensive action of the multiple factors in an atmospheric environment.
Owner:河北维立方科技有限公司

Carbon emission evaluation method and system based on digital twinborn model

The invention discloses a carbon emission evaluation method and system based on a digital twin model, and relates to the technical field of engineering building carbon emission systems. The system comprises a plurality of client terminals, an application server and a database, wherein each client terminal is provided with a user operation interface for technicians to execute related operations such as carbon emission planning, feedback, query, monitoring, evaluation report generation and the like; the application server comprises a plurality of functional modules for carbon emission calculation and is used for data processing, algorithm analysis and interface query of the digital twin model; and the database is used for storing digital twin model information and basic data information. The invention is used for carrying out rapid evaluation, fine calculation and real-time dynamic monitoring on the carbon emission in the whole life cycle of the factory, carbon emission evaluation is carried out based on a digital management platform and non-specific industries, the repeated work of carbon emission calculation can be reduced, the carbon emission accounting efficiency in the whole life cycle of the factory is improved, and the carbon emission calculation fineness and accuracy are ensured.
Owner:TIANJIN CEMENT IND DESIGN & RES INST

Circularly polarized light method and device for determining wall thickness and orientations of fibrils of cellulosic fibres

This invention provides a novel, rapid method and device for determining the relative phase retardation of different layers of a multi-layered specimen, which is related to the thicknesses of its layers and walls, and the orientations of its optical axes. An intact wood pulp fibre is a typical multi-layered birefringent specimen. This new method is based on the change of polarization of polarized light that passes through a specimen composed of birefringent layers with different optical axis orientations, such as directions of cellulosic microfibrils oriented differently in various layers of wood fibres. In particular, a novel solution is found to relate the emerging light intensity from an intact wood fibre to the incident light intensity, the wavelength of the light, and the relative phase retardations of various layers and orientations of their cellulosic microfibrils, such as fibril angle, in a circularly polarized light system. This new method evaluates the transmitted light intensities of multiple predetermined wavelengths simultaneously to determine the optical and physical properties of a multi-layered specimen being measured. A device for determining the relative phase retardation (retardance) of fibre walls and the fibril angle of intact wood fibres in accordance with the presented invention comprises a light source with well defined multi-wavelengths, an achromatic circularly polarized light system, appropriate imaging optics, a multi-channel camera such as a digital color camera that has two or more wavelength (color) detection channels, and an image processing and data analysis system. The measurements take advantage of the birefringence of cellulosic microfibrils, and thus require neither sample preparation nor high resolution optics. Specimen alignment is not required as specimens such as wood fibres are evaluated under circularly polarized light. Compared with other methods, this invention is more rapid, accurate, and robust. This method can be automated, and implemented in a fibre flow-through system, thus allowing a rapid assessment of wood pulp fibre properties (on-line in real time).
Owner:FPINNOVATIONS INC

AC-DC large power grid transient voltage stability evaluation method and system

ActiveCN111628501AFast and stable assessment resultsAvoid Time Domain SimulationElectric power transfer ac networkResourcesLoad following power plantElectric generator
The invention discloses an AC/DC large power grid transient voltage stability evaluation method and system. The method comprises the following steps of constructing a training sample set based on thehistorical power flow data; taking an expected output vector of the training sample set as a transient voltage stability index; constructing a converter bus transient voltage stability rapid evaluation model based on the transient voltage stability index; training the converter bus transient voltage stability rapid evaluation model by using the training sample set; and identifying a high-risk operation scene influencing the AC/DC large power grid transient voltage stability on line by using the trained converter bus transient voltage stability rapid evaluation model. According to the method, the minimum value of the secondary drop of the converter bus voltage after the fault is used as the output, the converter bus transient voltage stability rapid evaluation model is established, and theload active and reactive power, the generator active and reactive output and the key power transmission line power flow data obtained by rolling are input into the model to evaluate the stability ofthe power grid transient voltage in real time.
Owner:STATE GRID SHANDONG ELECTRIC POWER +2
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products