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2 results about "Risk evaluation" patented technology

Risk Evaluation Definition. Risk evaluation is defined by the Business Dictionary as: “Determination of risk management priorities through establishment of qualitative and/or quantitative relationships between benefits and associated risks.”.

Pipeline water quality risk evaluation method based on water supply network dynamic model

InactiveCN106600094AGuaranteed accuracySolve the evaluation problem of water quality riskGeneral water supply conservationResourcesDynamic modelsWater quality
The present invention discloses a pipeline water quality risk evaluation method based on a water supply network dynamic model. Establishing a water supply network dynamic waterpower and water quality model and performing accurate checking of the water supply network dynamic waterpower and water quality model through determination of the classification type and the evaluation indexes of the pipeline water quality risk; determining the weight of each evaluation index through adoption of the analytic hierarchy process; and dividing the grading standard of each evaluation index parameters based on the state data samples of the pipe network dynamic model, determining the degree of membership of each evaluation index, performing the fuzzy comprehensive evaluation, and determining the grade of the water quality risk of each pipeline in the pipe network. Though the steps mentioned above, all the pipelines of the whole water supply network are subjected to water quality risk evaluation, and the comparison and the ordering are performed according to the evaluation result to determine risk degree ordering of water quality changing and provide decision support for the management and maintenance of the pipe network; and moreover, the pipeline water quality risk evaluation method based on the water supply network dynamic model overcomes the defects that other evaluation methods are simple in index and do not take incomprehensive consideration, and the evaluation result is more reliable to ensure the accuracy and the life cycle of the evaluation.
Owner:GUANGZHOU JINGWEI INTELLIGENT TECH

Dynamic risk obtaining method for tunnel large deformation disasters

InactiveCN110210121AIncrease likelihoodPrediction results are objectiveGeometric CADDesign optimisation/simulationLarge deformationPosterior risk
The invention belongs to the technical field of tunnel engineering, and discloses a dynamic risk acquisition method for tunnel large deformation disasters, which comprises the following steps: S1, identifying risk disaster-causing factors according to historical data of the tunnel large deformation disasters; S2, selecting a prediction index according to the risk disaster-causing factor, and establishing a probability prediction model according to the prediction index; S3, dynamically updating surrounding rock parameters by using a Bayesian method and a Markov random process method according to the prediction index and the exposed surrounding rock information of tunnel face excavation; S4, according to the surrounding rock parameters, the prediction indexes and the probability prediction model, carrying out posterior risk updating and acquiring a dynamic risk prediction result of the tunnel large deformation disaster. The method solves the problems that in the prior art, a set of quantitative risk evaluation model capable of reflecting a large deformation action mechanism cannot be established, effective feedback of surrounding rock and support information in the construction period cannot be effectively utilized, and a dynamic and informationized risk evaluation theory cannot be formed.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
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