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51 results about "Minimum risk" patented technology

Minimum risk level. An estimate of daily human exposure to a concentration of a chemical that has a minimal appreciable risk of cancerous effects over a specified time period.

Fault diagnosis method during industrial process

InactiveCN105700518AReduce the "pollution" effectImprove reliabilityElectric testing/monitoringBayes decision rulePollution
The invention discloses a fault diagnosis method during the industrial process. The method comprises the steps of collecting historical normal data during the industrial process; calculating a detection statistics based on the historical normal data during the industrial process; collecting the to-be-detected data of the industrial process; on the condition that the industrial process is detected to be out of order, extracting a statistic feature based on the relative refactoring contribution method; according to the statistic feature, calculating a conditional probability density function in the fault mode and a conditional probability density function in the normal mode; according to the prior probability and the conditional probability density function, calculating a posterior probability; conducting the fault variable recognition on a current time sample based on the minimum risk Bayesian decision theory; according to a diagnosis result, updating the prior probability for the next time sample and conducting the fault diagnosis and recognition again for the next round. According to the technical scheme of the invention, the major failure variable, the secondary process variable and the normal variable of the current sample are distinguished. Meanwhile, the diagnosis result of the process variable of the previous time sample is applied to the diagnosis of the current sample. Therefore, the pollution effect during the fault diagnosis of the industrial process is eliminated.
Owner:HUAZHONG UNIV OF SCI & TECH

Bayesian algorithm-based content filtering method

The invention discloses a Bayesian algorithm-based content filtering method. Content filtering is performed for text information in a 3rd generation mobile communication core network, text classification is performed by using a double threshold-based Bayesian algorithm, C1 is set to be normal information, C2 is set to be junk information, a classifier estimates the probability that a characteristic vector X which represents a data sample belongs to each class Ci, and a Bayesian formula for the estimation is that: P(Ci/X) = P(X/Ci) P(Ci)/ P(X), wherein i is more than or equal to 1 and less than or equal to 2, the maximum value of a posterior probability is called the maximum posterior probability, for an error (a reference source is not found) of each class, the error (a reference source is not found) only needs to be calculated, a characteristic vector X of an unknown sample is assigned to the Ci class of the error (a reference source is not found) with the minimum risk value. Characteristic selection is performed by adopting document frequency (DF), and classification is performed by using minimum risk-based double threshold Bayesian decision. In a time division-synchronous code division multiple access (TD-SCDMA) mobile internet content monitoring system, the algorithm has higher controllability and can realize real-time high-efficiency classification of mass text information.
Owner:SOUTHEAST UNIV

Fast method for HEVC (High Efficiency Video Coding) block size partition based on Bayes decision

The invention discloses a fast method for HEVC (High Efficiency Video Coding) block size partition based on a Bayes decision. The fast method comprises the following steps: first of all, dividing a video sequence into an online learning stage and a fast partitioning stage by employing scene change detection based on an average gray scale difference; then, for the online learning stage and a video frame which occurs a scene change, in each partitioning depth, respectively extracting Jinter and Jintra of a CU (Coding Unit) as characteristic values, thereby establishing a mixed Gaussian model, wherein specific parameters of the model are determined according to an EM algorithm initialized by a K-Means algorithm; and for a to-be-partitioned CU in the fast partitioning stage, extracting the characteristic values and finding a conditional probability on whether to partition according to the mixed Gaussian model, and at last, finding the decision with a relatively small risk by employing a Bayes formula of a minimum risk to take as a judgment basis on whether the current CU is partitioned. According to the fast method disclosed by the invention, the algorithm complexity is reduced, and the coding time can be greatly reduced.
Owner:芜湖启博知识产权运营有限公司

Methods for producing recombinant polyclonal immunoglobulins

The purpose of the present invention is to provide methods for producing recombinant polyclonal immunoglobulins using recombinant DNA techniques, which provides constant supply of immunoglobulin preparations with minimum risk of infection. A method of the present invention comprises the following steps:
  • (1) isolating a plurality of types of genes from cDNAs derived from tissues or cells expressing immunoglobulins, said genes encoding a plurality of types of polypeptides respectively, and said polypeptides containing a plurality of types of immunoglobulin variable regions respectively, and preparing mixture of the genes;
  • (2) preparing a plurality of types of recombinant vectors into which a plurality of types of genes are introduced respectively by contacting said mixture of the genes with vectors, and preparing mixture of the recombinant vectors;
  • (3) preparing a plurality of types of transformants into which a plurality of types of recombinant vectors are introduced respectively by contacting said mixture of the recombinant vectors with host cells, and preparing mixture of the transformants; and
  • (4) culturing said mixture of the transformants, and obtaining mixture of polypeptides from the transformants culture, wherein said polypeptides contain a plurality of types of immunoglobulin variable regions respectively.
Owner:SUZUKI CO LTD Y +2

Collision avoidance decision-making method based on water surface unmanned ship

The invention relates to a collision avoidance decision-making method based on a water surface unmanned ship. The collision avoidance decision-making method comprises the following steps: detecting and collecting each target in real time by using a sensing system of the water surface unmanned ship; analyzing the meeting situation, and judging whether a collision risk exists or not; calculating feasible collision avoidance measures for each target with the collision danger; fusing the similar collision avoidance measures, and obtaining the optimal solution of the various collision avoidance measures; establishing a collision avoidance decision risk assessment model, and calculating the risk values of the optimal solutions of various collision avoidance measures; and selecting an optimal collision avoidance scheme according to the calculated risk value, outputting the optimal collision avoidance scheme to an execution system, and updating in real time until the collision avoidance process is completed. The collision avoidance decision-making method is reasonable in design, and can carry out risk coefficient resolving and comparison on various feasible collision avoidance action schemes in real time, so as to obtain a collision avoidance decision scheme with the minimum risk coefficient and provide the collision avoidance decision scheme for the water surface unmanned ship, so that the rapid and safe obstacle avoidance function of the unmanned ship is achieved, and navigation safety of the unmanned ship is guaranteed, and the collision avoidance decision-making method is simple and easy to achieve.
Owner:TIANJIN NAVIGATION INSTR RES INST

Device for steel cover box with bottom of deep water high-rise pile cap by hoop-embracing method and construction method

InactiveCN106223355ASolve the problem of difficult overall hoistingQuality assuranceFoundation engineeringPile capSheet steel
The invention discloses a device for a steel cover box with a bottom of a deep water high-rise pile cap by a hoop-embracing method and a construction method. The device comprises a plurality of concrete tubular piles, hoops arranged on the concrete tubular piles and the steel cover box connected to the hoops, wherein the steel cover box comprises a bottom plate and a side plate fixedly connected to the bottom plate; the bottom plate comprises a plurality of bottom modules, a bottom sealing plate fixedly connected to the bottom modules and concrete on the bottom sealing plate; the bottom modules are fixedly connected to the hoops; each of the hoops comprises two semi-circular steel plates which are fixedly connected to the concrete tubular piles through high-strength bolts; corbels are arranged on the semi-circular steel plates; and the bottom modules are fixedly connected to the corbels. According to the device disclosed by the invention, the quality and safety stability of a steel cover box technology are guaranteed, so that a project is constructed with a relatively low cost and the minimum risk, the problem that the steel cover box with the bottom is free of supporting points on the concrete tubular piles is solved, the problem that the steel cover box which is relatively large in planar dimension is hard to hoist integrally is solved, and the application range of a deep water high-rise pile cap construction technology is expanded.
Owner:CHINA HUASHI ENTERPRISES

Method for obtaining reservoir group multi-objective scheduling risk analysis optimal equilibrium solution

The invention discloses a method for obtaining a reservoir group multi-objective scheduling risk analysis optimal equilibrium solution. The method comprises the acquisition of a multi-objective scheduling risk analysis noninferior solution, the calculation of a uniformity rate decision method of multi-objective scheduling risk analysis, and the calculation of a risk and benefit conversion relation and a threshold determination process in multi-objective scheduling. In the acquisition of the multi-objective scheduling risk analysis noninferior solution, firstly a cascade reservoir combined dispatching multi-objective minimum risk model is established, then a scheme is obtained through a selection operation in a genetic algorithm to carry out non-dominated sorting, and through the continuous renewal and elimination of crossover and variation operations in the algorithm, finally a solution curve or curve surface formed by a solution set is outputted. In the calculation process of the uniformity rate decision method of the multi-objective scheduling risk analysis, and based on a uniformity rate, a decision mode of the optimal equilibrium solution is determined. In the process of the calculation of a risk and benefit mutual conversion relation and a threshold determination process in multi-objective scheduling, based on the bifurcation theory, the threshold of a risk and benefit conversion relation between objectives is analyzed and determined.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Rumor risk assessment method based on network risk entropy difference

The invention discloses a rumor risk assessment method based on A network risk entropy difference. The method comprises: S1, establishing an SIR model based rumor propagation model for a network platform to be assessed; S2, using the rumor source identification method to identify a rumor source and the propagation time on the basis of a network structure of the rumor propagation model; S3, simulating a forward propagation process of the rumor in the network structure to obtain the probability that each node in the network is in a different state at the current time; S4, calculating the maximumrisk entropy and the minimum risk entropy of the network at the current time according to the probability that each node is in a different state at the current time; S5, calculating the network riskentropy of the current time by using the maximum risk entropy and the minimum risk entropy of the network at the current time; and S6, calculating the network risk entropy difference according to thenetwork risk entropy at the current time and the previous time of the network, and assessing the potential risk caused by the rumors at the current time to the network platform according to the network risk entropy difference. The invention can quantitatively and accurately assess the risk caused by rumors to the network in real time.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Intermittent process mode recognition method based on Bayesian statistical analysis

ActiveCN108734213AFully consider timing characteristicsImplement modal recognitionCharacter and pattern recognitionCluster algorithmStatistical analysis
The invention discloses an intermittent process mode recognition method based on Bayesian statistical analysis, and belongs to the technical field of intermittent process monitoring. The method comprises the steps of firstly, expanding three-dimensional historical process data of an intermittent process into two-dimensional data along a batch method, and carrying out data standardization on the expanded data; secondly, performing clustering analysis on the standardized process data by utilizing a fuzzy C-mean clustering algorithm, setting a mode coarse division subordination rule, and obtaining a mode coarse division result; and finally, analyzing the mode coarse division result by utilizing a Bayesian network classifier, introducing a mode inference coefficient of a time sequence constraint, inferring a minimum risk criterion according to a mode, and judging final attribution of the mode, thereby realizing mode recognition of the intermittent process. According to the method, the timesequence constraint of intermittent process data is fully considered; effective division of a stable mode and a transition mode of the intermittent process is achieved through the Bayesian statistical analysis; and the method has relatively high mode recognition accuracy.
Owner:BEIJING UNIV OF CHEM TECH
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