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75results about How to "Reliable screening" patented technology

Pilot protection method for power transmission line based on signal distance and Bergeron model

The invention relates to a pilot protection method for a power transmission line based on signal distance and Bergeron model, belonging to the technical field of relay protection for electric power systems. The pilot protection method comprises the following steps of: when the power transmission line has faults, in a short-time window, measuring voltages (uM, uN) and currents (iM, iN) at the head end (M) point and the tail end (N) point of the power transmission line, simulating and calculating the current at the tail end of the power transmission line by using the actually measured voltage (uM) and current (iM) at the head end according to the line current distribution rule expression of the Bergeron model, comparing the waveforms of the quasi tail end current and the actually measured tail end current (iN), calculating the mutual distance degree between the quasi current and the actually measured current (iN), comparing the calculated mutual distance degree with the set mutual distance degree setting value, and identifying faults inside or outside the region according to the size relationship of the two mutual distance degrees. The pilot protection method is not influenced by excesssive resistance and fault initiating angle and has the advantages of quickly and reliably identifying faults inside and outside the region and the like.
Owner:KUNMING UNIV OF SCI & TECH

Tumor cell three-dimensional model and construction method and application thereof

The invention belongs to the technical field of tumor cell three-dimensional culture, and particularly relates to a tumor cell three-dimensional model and a construction method and application thereof. According to the construction method, an alginate solution is added into a mixed cell suspension solution containing tumor cells and fibroblasts, a mixed cell-alginate solution is obtained, and thenthe mixed cell-alginate solution is dropped into a calcium salt solution to obtain mixed cell microspheres. The tumor cell three-dimensional model and the construction method and application thereofhave the advantages that alginate and calcium salt are adopted for cross-linking to prepare the microspheres as cytoskeletons, thereby reducing the cost of three-dimensional culture of the tumor cells, the alginate has good biocompatibility and non-immunogenicity, thereby being capable of providing a good three-dimensional growth environment for the cells, and three-dimensional co-culture is carried out on the tumor cells and the fibroblasts, thereby being capable of simulating the living environment of the tumor cells in the body more accurately, so that screening and/or evaluation of antitumor drugs by the constructed tumor cell three-dimensional model are/is more accurate and reliable, thereby being capable of reducing the cost of the research and development of the antitumor drugs.
Owner:GUANGDONG UNIV OF TECH

Intelligent review system based on semantic splitting and working method

The invention provides an intelligent review system based on semantic splitting and a working method. The system comprises an expert database subsystem, an expert extraction subsystem, an expert review subsystem, a data entry subsystem, an evaluation rule subsystem, a data comparison subsystem and an intelligent review subsystem. An expert database, expert technical fields and expert personal information are generated according to expert information. a target evaluation rule is set, and a target review expert is obtained; normalization processing is performed on obtain a scoring table and review opinions; and data verification is carried out, a single evaluation rule, a multi-dimensional evaluation rule, an index evaluation rule and a fund evaluation rule are set, document classification, compliance check and innovativeness check are carried out, and a comprehensive score can be generated. According to the system and the method provided by the technical schemes of the invention, project classification is carried out through semantic splitting, intelligent preliminary screening is carried out through multi-dimensional comprehensive scoring of innovation, grammar compliance and the like, and the review efficiency is improved on the basis of online automatic expert screening, review time arrangement and comprehensive scoring.
Owner:江西清能高科技术有限公司

Cloud server-based investment management evaluation system

The invention discloses a cloud server-based investment management evaluation system. The system includes an information acquisition terminal, a risk evaluation module, an income evaluation module anda report generation terminal. The information acquisition terminal collects running information of all investment enterprises, and sends the collected running information to the risk evaluation module. The risk evaluation module compares the received running information and preset risk rating information to determine investment risk coefficients of the investment enterprises, and respectively sends the same to the income evaluation module and the report generation terminal according to the investment risk coefficients of the investment enterprises. The income evaluation module calculates income evaluation coefficients according to the received investment risk coefficients, and sends the income evaluation coefficients to the report generation terminal. The system can effectively evaluate investment risks and incomes of all the investment enterprises through the risk evaluation module and the income evaluation module, facilitates reliable screening of managers on the investment enterprises, and has the characteristics of high accuracy of screening and time saving of manual reviewing.
Owner:安徽天勤盛创信息科技股份有限公司

Screening method for pollutants in water

The invention provides a screening method for pollutants in water. The screening method comprises the following steps of: obtaining a sample to be detected from a water sample to be detected; carryingout two-dimensional gas chromatographic analysis on the sample to be detected to obtain an intermediate analyte; bombarding one part of the intermediate analyte through an EI ion source to generate ions with different mass-to-charge ratios; carrying out mass spectrum analysis to obtain first spectrograms which are arrayed according to the size sequence of the mass-to-charge ratios; carrying out ECD (Electron Capture Detector) detection on the other part of the intermediate analyte to obtain second spectrograms; screening the first spectrograms by adopting a mass spectrum difference value method and comparing with the second spectrograms; if a screening result of the mass spectrum difference value method has an effective signal which represents organic chloride, organic bromide or a nitrylsubstitute possibly and the second spectrograms also have the effective signal, determining that the sample contains the organic chloride, the organic bromide or the nitryl substitute. By adopting the method provided by the invention, reliable screening of chlorine substituted (-Cl) organic pollutants, bromine substituted (-Bl) organic pollutants and nitryl substituted (-NO2) organic pollutants can be conveniently and rapidly realized.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Transformer digital self-adaptive protection device and method based on pressure features

ActiveCN109980602AFast enoughHas a cumulative effectEmergency protective circuit arrangementsSignal conditioningFuel tank
The invention provides a transformer digital self-adaptive protection device and method based on pressure features. The device comprises a transient oil pressure feature quantity measuring module, a switching quantity input module, a signal modulation and collection module and a digital core module, wherein the transient oil pressure feature quantity measuring module is connected with the signal modulation and collection module; and the signal modulation and collection module and the switching quantity input module are connected with the digital core module. The transient oil pressure digitalinformation of a plurality of measuring points inside an oil tank is obtained in real time; an action pressure value representing the oil pressure amplitude is obtained through operation; a protectioncriterion and threshold value setting method is built by using the obvious differences of the feature quantity under different operation conditions of a transformer; the reliable fast and sensitive discrimination and elimination of faults inside the oil tank of the transformer can be realized; and no influence is caused by excitation inrush current. Meanwhile, the fault state self-adaptive and threshold value self-adaptive protection scheme is designed so as to accelerate the protection action speed.
Owner:BEIJING ZHONGRUIHE ELECTRICAL +1

On-load tap changer top cover deformation monitoring and protecting integrated device and method

The invention discloses an on-load tap changer top cover deformation monitoring and protecting integrated device and method. The device comprises an oil pressure starting unit and a strain monitoring unit; the oil pressure starting unit and the strain monitoring unit are disposed on a converter transformer tap changer top cover; the oil pressure starting unit comprises a high-frequency dynamic oil pressure sensor; the strain monitoring unit comprises a strain sensor; and the strain monitoring unit is also connected with an alarm unit and a tripping unit. The device and method have an irreplaceable protection effect on reliably and quickly identifying the plastic deformation of the top cover. The device and method have important engineering practical significance for transformer operation personnel to accurately and reliably acquire internal oil pressure of the oil chamber of the transformer tap changer and the deformation data of the top cover of the transformer tap changer in real time and evaluate the safe operation state of a transformer. The device can reliably operate for a long time, is not influenced by strong electromagnetism and greasy dirt environment, has the advantages of high response speed and high measurement frequency, does not inject harmonic waves into a power system in the operation process, and does not influence the normal operation of primary and secondary equipment in a transformer substation.
Owner:XI AN JIAOTONG UNIV
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