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2 results about "Characteristic length" patented technology
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In physics, a characteristic length is an important dimension that defines the scale of a physical system. Often, such a length is used as an input to a formula in order to predict some characteristics of the system.
A method and system for online uniformity monitoring of TMR stirring process based on dynamic particle morphology recognition
PendingCN122090155Aguarantee authenticityReflects mixing uniformityImage analysisEnsemble learningCharacteristic lengthEngineering
This invention discloses an online uniformity monitoring method and system for TMR mixing process based on dynamic particle morphology recognition, relating to the field of intelligent monitoring technology in feed processing. The method includes: during material mixing, real-time acquisition of dynamic images of the material within the mixing chamber; identification of material particles in the dynamic images; extraction of the characteristic length of each particle; and calculation of skewness and kurtosis based on the characteristic length; division of the effective observation area of the dynamic images into multiple sub-regions based on the centroid coordinates of all material particles in the dynamic images; extraction of particle characteristic statistics within each sub-region; and construction of a multidimensional spatial uniformity index set to characterize the mixing state of the material; input of the skewness, kurtosis, and multidimensional spatial uniformity index set into a pre-trained evaluation model, outputting a comprehensive uniformity index and corresponding quality level.
Owner:INSTITUTE OF ANIMAL SCIENCES OF CHINESE ACADEMY OF AGRICULTURAL SCIENCES
Strength calculation method of composite laminates considering the effect of open-hole size
The application discloses a kind of composite laminated plate strength calculation methods considering the size effect of opening, belong to the technical field of composite laminated plate.The present application is in view of the problem that existing prediction method relies on a large number of layer-specific test or complex numerical model, through a set of standard opening plate tensile test, combined with the basic mechanics parameters of unopened laminated plate, first calculate the characteristic length of standard plate and 0 ° layer strain energy release rate, and then establish the strain energy release rate conversion relationship between any orthogonal layer, finally realize the accurate prediction of the strength of any orthogonal layer, different aperture opening plate.This method greatly reduces the number of tests and cost, avoids the unconventional test such as fracture toughness, and is completed based on analytical formula throughout, high precision, simple operation, easy to apply and popularize in engineering practice.
Owner:NANTONG UNIV