The normalization of the epidemic and the convenience of online classes have led to the rapid rise of online education courses. The MOOC teaching platform represents the online course field and is popular in various disciplines. Unlike disciplines such as natural science and engineering technology, art education courses require real-time emotional expression and transmission. However, the existing technical framework is difficult to support the interactive needs of art teaching mode, and the learning effect of art students is not ideal, and the user The learning effect of art students is not ideal, and the phenomenon of low user satisfaction and low willingness to continue learning is more serious. Based on the above background, this paper uses Python to crawl the review texts of art online courses and summarizes the factors influencing students' satisfaction with art education online courses through sentiment analysis and LDA model to provide valuable references for the quality of art online education.
Abstract: A numerical method is presented to incorporate plastic mechanics theory with component mode synthesis technique for the analysis of elastic-plastic dynamic responses of flexible structure subjected impulsive load. To do this, the nonlinearity induced by plastic deformation is treated and approximated as an internal excited load, which is placed on the right-hand side of the incremental governing equations. This technique is so-called pseudo-force method. And then, the governing equations of plastic dynamic problems in modal coordinate are derived from fixed-interface component mode synthesis technique, the solving method of these equations is also introduced. By using the proposed method, the modal transformation matrix of system is calculated only once, and is used throughout the entire analysis. This will be an improvement of computational efficiency. A simply supported beam suffered harmonic load and impact event are studied, respectively. The simulation results show that the proposed method has a higher computational efficiency and accuracy by comparing with the full model finite element method.Key words:elastic-plastic;transient response;component mode synthesis;reduction technique;numerical method 0 前言 1
Marketing behavior is one of the critical factors for operators' success. Operators may conduct improper operations while using marketing methods to attract consumers and obtain certain economic benefits. This paper analyzes the influence factors of marketing personnel misconduct. Based on Fuzzy-ISM-MICMAC (Interpretive Structure Modeling-Matrice 'Impacts Croises Appliqueeaun Classement) model calculation. Considering marketing personnel's misconduct in commercial activities as the research starting point, it is divided into four aspects: human quality, environmental constraints, institutional defects, and management problems, including 14 indicators. This paper aims to analyze the misconduct of marketing personnel, promote marketing personnel to use proper marketing methods for business activities, improve consumer recognition, create a harmonious business atmosphere, and promote the market's healthy development.
Abstract. This paper evaluates the validity of component mode synthesis (CMS) technique for dynamic response of elastic-plastic structures. A method incorporating elastic-plastic material behaviour and the fixed interface mode synthesis technology is presented. To do this, the incremental governing equations of elastic-plastic transient problem derived from nonlinear finite element theory are linearized in each time step, the tangent stiffness matrix is used to generate the basis vector of transformation matrix. Using the proposed method, the response of a simply supported beam loaded impulsively is examined. The Numerical results indicate that the proposed method is accurate, convergent and more efficient compared with the full order finite element model.
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