1,180 research outputs found

    Analysis of the Literary Text's Conceptosphere in the Process of Teaching Literary Translation

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    AbstractThe paper is devoted to the problem of the concept “painting” realization in the “Moon and sixpence” by S. Maugham. It is argued that application of cognitive discourse analysis and analysis of the conceptosphere of the literary text is helpful in overcoming difficulties in interpretation of the original literary text. Various methods of studying literary text existing in modern methodology are shown. The contribution of Russian and foreign science in determining approaches to the analysis of communicative and cognitive components of the text and application of interdisciplinary approaches and consideration of cultural aspects of literary texts of the target language are emphasized. The need for incorporating development of important translational competences into the process of carrying out cognitive-discourse analysis of the literary text is demonstrate

    Cumulative Surface Location Error for Milling Processes Based on Tool-tip Frequency Response Function

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    AbstractIn milling processes, the desired machined surface cannot be perfectly achieved even in case of chatter-free machining due to the thermally induced errors, the trajectory following errors and the most significant one: the cutting force induced vibration errors. In case of vibration, the error is represented by the so-called Surface Location Error (SLE), which is the distance between the machined and the required surface position. In case of roughing operations, these errors can have a significant impact on the surface position due to the interaction between the subsequent SLEs. The machined surface depends on the previously resulted SLE through the variation of the radial immersion. In this paper, the series of the consecutive SLEs are investigated in a multi-degree-of-freedom model. The dynamical behaviour of the milling tool is described by frequency response functions. The variation of the SLE values is governed by a discrete map, which may lead to an unpredictable final surface position. The parameter range where this unpredictable final SLE occurs is presented together with the traditional stability chart representing the chatter-free domains of cutting parameters. With the proposed methods, the traditional stability chart can be improved, from which chatter-free and CSLE-stable technological parameters can be selected

    A simulated investigation on the machining instability and dynamic surface generation

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    In this paper, the authors propose the generic concept of machining instability based on the analysis of all kinds of machining instable behaviors and their features. The investigation covers all aspects of the machining process, including the machine tool structural response, cutting process variables, tooling geometry and workpiece material property in a full dynamic scenario. The paper presents a novel approach for coping with the sophisticated machining instability and enabling better understanding of its effect on the surface generation through a combination of the numerical method with the characteristic equations and using block diagrams/functions to represent implicit equations and nonlinear factors. It therefore avoids the lengthy algebraic manipulations in deriving the outcome and the solution scheme is thus simple, robust and intuitive. Several machining case studies and their simulation results demonstrate the proposed approach is feasible for shop floor CNC machining optimisation in particular. The results also indicate the proposed approach is useful to monitor the machining instability and surface topography and to be potentially applied in adaptive control of the instability in real time
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