Xiaolan Yao, Xiangtao Yu, Qinghe Wu and Qihong Liang
The purpose of this paper is to solve the problem of a pure time delay in the hydraulic automatic gauge control (HAGC) system.
Abstract
Purpose
The purpose of this paper is to solve the problem of a pure time delay in the hydraulic automatic gauge control (HAGC) system.
Design/methodology/approach
Smith predictor is selected to solve pure time delay of the HAGC system. The model of thickness predictor is identified by the extended recursive least square algorithm. The parameters of controller are adjusted by particle swarm optimization algorithm (PSO). The simulation result shows that the Smith predictor has good response performance and anti‐disturbances ability.
Findings
The control precision of the HAGC system in the finished mill can be obviously improved by Smith predictor with PSO arithmetic. The Smith predictor with PSO arithmetic is suitable to solve the pure time delay in the HAGC system.
Research limitations/implications
Randomicity in rolling process and the effect of other mill stands are the main limitations based on which the model will be applied.
Practical implications
A very useful method to improve the precision of the strip.
Originality/value
This paper presents a new method of Smith predictor with PSO arithmetic is designed for a HAGC system in the finished mill to solve a pure time delay problem. The object model is acquired by system identification method.
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Keywords
Zhiqiang Liang, Xintian Liu, Wang Yansong and Xiaolan Wang
This study aims to accurately evaluate the influence of various error intervals on the performance of the wiper.
Abstract
Purpose
This study aims to accurately evaluate the influence of various error intervals on the performance of the wiper.
Design/methodology/approach
The wiper structural system is decomposed into classical four-link planar for kinematics analysis, and it was modeled respectively by using interval method, universal grey number theory and enumeration approach depending on the nature of uncertainty.
Findings
The universal grey number theory is a viable methodology for the accurate analysis of uncertain structural system.
Originality/value
(1) The model of uncertain wiper structural system is established. (2) Universal grey number theory and new parameters are adopted to analyze the presence of uncertain wiper structural system. (3) Comparative analysis of response quantities is obtained by interval method, universal grey number theory and enumeration method.
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Qi Yao, Chao Hu and Jianjian Du
To provide theoretical guidance on improving luxury brands’ marketing performance, this study aims to examine the impact mechanism and boundary conditions of luxury brand buyers’…
Abstract
Purpose
To provide theoretical guidance on improving luxury brands’ marketing performance, this study aims to examine the impact mechanism and boundary conditions of luxury brand buyers’ consumption resources on observers’ brand attitudes from the perspective of consumers’ power distance beliefs (PDBs).
Design/methodology/approach
Four experimental studies were conducted. Study 1 examined the influence of the interaction of consumption resources and PDBs on luxury brand attitudes; Study 2 examined the mediating role of prestige perception. Study 3 excluded alternative explanations of (dis)association motivation and envy. Finally, Study 4 examined the moderating effect of brand relationship norms.
Findings
Consumers with low PDBs had lower attitudes towards luxury brands when consumption resources were acquired through luck (rather than effort). However, no significant difference in luxury brand attitudes was found between these two consumer groups when PDBs were high. Consumers’ perceptions of prestige played a mediating role in the main effect, whereas brand relationship norms moderated the main effect.
Originality/value
First, this study reveals the unique role of PDBs in shaping consumer attitudes towards luxury brands. Second, it uses consumption resources as a signal for luxury consumption and identifies a way to influence consumers’ attitudes towards luxury brands, namely, their perceptions of prestige. Third, it uncovers the influence of consumers’ brand relationship norms on the formation of luxury brand attitudes.
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Ming Li, Weiguo Fan and Xiaolan Luo
In response to the government’s decision to make “entrepreneurship and innovation for all” a national strategy in its 2015 annual work report, Chinese professionals in the library…
Abstract
Purpose
In response to the government’s decision to make “entrepreneurship and innovation for all” a national strategy in its 2015 annual work report, Chinese professionals in the library field have expressed a growing interest in makerspaces. This study aims to provide an overview of their current research studies and attempts in constructing makerspaces.
Design/methodology/approach
The authors aggregated research materials on library makerspaces in China from two sources: journal articles from the China National Knowledge Infrastructure Database and online news reports from the search engine Baidu.com. Content analysis was used to extract information regarding visions and perceived values, service models and technology adoption.
Findings
While a growing number of Chinese academic publications are concerned with library makerspaces, the existing research focuses on foreign cases and offers few empirical studies on domestic application scenarios. Libraries and researchers in China hold a positive and supportive attitude toward makerspaces. 3D printing is the most frequently mentioned technology, and free-to-use, promoting communication and realization of ideas and dreams are the most emphasized values. Libraries should highlight their own unique advantages and tap into their resources and services in mutually beneficial collaborations with other types of makerspaces.
Research limitations/implications
First, the results of this study cannot fully summarize the development status of makerspaces in Chinese libraries. Second, the research materials used in this study may be biased, especially the news reports.
Practical implications
This paper presents a semantic, visualized analysis of aggregated online news articles and journal articles on library makerspaces in China in an attempt to summarize their characteristics and guiding values, validate the advantages of library makerspaces and give suggestions on improving their service models.
Social implications
This paper introduces the development trend of makerspace in Chinese libraries, so that researchers at home and abroad can learn more about the development of Chinese library.
Originality/value
This study comprehensively overviews the development of library makerspaces in China. The results provide suggestions to improve maker services in library.
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Xiao‐lan Yao, Xiang‐tao Yu, Qing‐he Wu and Qi‐hong Liang
The purpose of this paper is to reduce the crop losses at two ends and both sides of a plate in the rolling process, to produce a rectangular plan view pattern plate and to…
Abstract
Purpose
The purpose of this paper is to reduce the crop losses at two ends and both sides of a plate in the rolling process, to produce a rectangular plan view pattern plate and to enhance the total product yield of the plates.
Design/methodology/approach
Based on sample data and the unchangeable principle of the slab volume in the rolling process, the predictive MAS control models were set‐up. They are width broad MAS predictive model, width broad MAS control model, gaugemeter automatic gauge control (GM‐AGC) model, and plates tracking model. After the models were tuned, the rolling test was implemented at LinFen Iron & Steel Co., Ltd.
Findings
It is found that by accurately predictive online modeling of MAS methods, the plan view pattern control can be applied in plate mills.
Research limitations/implications
As the rolling process is in high temperature, the plan view pattern is difficult to be detected. Normally, the real‐time abnormity distortion cannot be obtained.
Practical implications
The test results showed that the crop losses are reduced and the product yield is greatly increased.
Originality/value
This paper presents an accurately predictive online modeling of MAS method.
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Ailing Pan, Qian Wu and Jingwei Li
This paper aims to study the impact of external fairness of executive compensation on M&A premium, and examine the moderate role of institutional investors. The high M&A premium…
Abstract
Purpose
This paper aims to study the impact of external fairness of executive compensation on M&A premium, and examine the moderate role of institutional investors. The high M&A premium is the main factors that induce the huge impairment of listed companies’ goodwill and the plummeting performance. Executives are the decision-makers of M&As, and their decision-making process is inevitably affected by the psychological factors. In recent years, institutional investors have become an important external force that can affect the governance of listed companies.
Design/Methodology/Approach
The authors use M&A data of listed companies from 2008 to 2018 and use OLS regression to test the relationship between executive compensation fairness and M&A premium.
Findings
The results show that the lower the external fairness of executive compensation, the greater the M&A premium. Institutional investors can effectively reduce the impact of external compensation unfairness on M&A premiums. The mechanism tests show that executives' psychological perception of fairness induced by external unfairness reduces their motivation to work and prompts them to use high premium to seek alternative compensation incentives. Further examinations of executive characteristics and corporate characteristics show that the role of external unfairness in executive compensation in driving M&A premiums is more pronounced in companies with longer executive tenure, weaker executive reputation incentives and private property.
Originality/Value
This paper enriches the research on the pre-factors of M&A premiums from the perspective of executives’ psychological perception of fairness, provides evidence that institutional investors play a positive governance role and provides decision-making references for companies to take corresponding measures to reduce M&A premium risks.