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Asymmetric Effects of Perceived Quality on overall evaluation and Moderating Effect of Sentiment:Evidence from Automobile Reviews

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Journal of Systems Science and Systems Engineering 2023年第1期32卷 16-33页

作者： Tong Yang Yanzhong Dang Jiangning Wu Institute of Systems Engineering Dalian University of TechnologyDalian116024China

Perceived quality is consumers’subjective perceptions of a product’s attributes,which directly influences the overall evaluation of the *** research has suggested that the perceived quality of attributes has an asymmetric effect on the overall evaluation,but limited research has been conducted on this asymmetric effect in the automobile industry and the moderating effect of *** paper investigates the asymmetric effect of perceived quality on overall evaluation using social media data from the automobile ***,the asymmetric effect of perceived quality on overall evaluation was identified for different attributes using penalty-reward contrast analysis(PRCA),and attribute classification was realized by calculating the IA index,i.e.,Appearance is an excitement attribute and the remaining attributes are basic ***,the differences in the asymmetric effects of each attribute category were analyzed,and the basic attributes were found to have a greater effect on the overall evaluation,with a positive moderating effect of sentiment on the *** study contributes to perceived quality research as well as consumer evaluation research and provides manufacturers with a prioritization method for attribute improvement.

关键词： Perceived quality overall evaluation asymmetric effects OLS automobile reviews

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overall evaluation of Organic Paddy Soil Fertility

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Agricultural Science & Technology 2014年第12期15卷 2138-2140页

作者：刘亚柏江苏丘陵地区镇江农科所江苏句容212400

[Objective] The aim was to explore soil quality and fertility of organic rice fields in Daizhuang Village. [Method] The analysis was made based on soil samples from different areas where planting methods varied after harvest of organic rice. [Result] The content of organic matter improved generally in fields of organic rice in Daizhuang. Specifically, the contents of N, P and K were not high, and the contents of N and P declined in the fields with crop rotation of organic rice Astragalus sin# cus, but the content of K increased. [Conclusion] It is of great significance for soil fertility to develop and promote crop rotation of organic rice Astragalus sinicus, which also advances quality of organic rice.

关键词： Organic rice Soil fertility overall evaluation

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WEB SERVICE SELECTION ALGORITHM BASED ON PRINCIPAL COMPONENT ANALYSIS

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Journal of Electronics(China) 2013年第2期30卷 204-212页

作者： Kang Guosheng Liu Jianxun Tang Mingdong Cao Buqing Department of Computer Science and Engineering Hunan University of Science and Technology School of Computer Science Fudan University

Existing Web service selection approaches usually assume that preferences of users have been provided in a quantitative form by users. However, due to the subjectivity and vagueness of preferences, it may be impractical for users to specify quantitative and exact preferences. Moreover, due to that Quality of Service (QoS) attributes are often interrelated, existing Web service selection approaches which employ weighted summation of QoS attribute values to compute the overall QoS of Web services may produce inaccurate results, since they do not take correlations among QoS attributes into account. To resolve these problems, a Web service selection framework considering user's preference priority is proposed, which incorporates a searching mechanism with QoS range setting to identify services satisfying the user's QoS constraints. With the identified service candidates, based on the idea of Principal Component Analysis (PCA), an algorithm of Web service selection named PCA-WSS (Web Service Selection based on PCA) is proposed, which can eliminate the correlations among QoS attributes and compute the overall QoS of Web services accurately. After computing the overall QoS for each service, the algorithm ranks the Web service candidates based on their overall QoS and recommends services with top QoS values to users. Finally, the effectiveness and feasibility of our approach are validated by experiments, i.e. the selected Web service by our approach is given high average evaluation than other ones by users and the time cost of PCA-WSS algorithm is not affected acutely by the number of service candidates.

关键词： Principal Component Analysis (PCA) Web service selection Quality of Service (QoS) overall evaluation

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