Pingping He, Feng Gao, Yan Li, Wenwu Wu and Dongya Zhang
The purpose of this paper is to research on optimization of spindle bearing preload based on efficiency coefficient method and provide theoretical guidance for variable preload of…
Abstract
Purpose
The purpose of this paper is to research on optimization of spindle bearing preload based on efficiency coefficient method and provide theoretical guidance for variable preload of intelligent spindle.
Design/methodology/approach
Based on an established thermo-mechanical coupling model of angular contact ball bearing with fix-position preload, temperature rise and axial stiffness of the bearing at different speeds and preload are analyzed, and life of the bearing is estimated by the improved L-P theory. The bearing temperature rise, axial stiffness and life data are standardized, and the preload is optimized by the efficiency coefficient method according to the requirements of operating conditions.
Findings
The optimized preload meets comprehensive requirements of the bearing temperature rise, axial stiffness and life under different operating conditions.
Originality/value
In the past studies, it is rarely reported that temperature rise, stiffness and life of the bearing under thermo-mechanical coupling effect are used as objective functions to optimize preload at different speeds.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-06-2020-0205/
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Pingping He, Feng Gao, Yan Li, Wenwu Wu and Dongya Zhang
Under fix-position preload, the high rotation speed of the angular contact ball bearing exacerbates the frictional heat generation, which causes the increase of the bearing…
Abstract
Purpose
Under fix-position preload, the high rotation speed of the angular contact ball bearing exacerbates the frictional heat generation, which causes the increase of the bearing temperature and the thermal expansion. The high rotation speed also leads to the centrifugal expansion of the bearing. Under the thermal and centrifugal effect, the structural parameters of the bearing change, affecting the mechanical properties of the bearing. The mechanical properties of the bearing determine its heat generation mechanism and thermal boundary conditions. The purpose of this paper is to study the effect of centrifugal and thermal effects on the thermo-mechanical characteristics of an angular contact ball bearing with fix-position preload.
Design/methodology/approach
Because of operating conditions, elastic deformation occurs between the ball and the raceway. Assuming that the surfaces of the ball and channel are absolutely smooth and the material is isotropic, quasi-static theory and thermal network method are used to establish the thermo-mechanical coupling model of the bearing, which is solved by Newton–Raphson iterative method.
Findings
The higher the rotation speed, the greater the influence of centrifugal and thermal effects on the bearing dynamic parameters, temperature rise and actual axial force. The calculation results show that the effects of thermal field on bearing dynamic parameters are more significant than the centrifugal effect. The temperature rise and actual axial force of the bearing are measured. Comparing the calculation and the experimental results, it is found that the temperature rise and the actual axial force of the bearing are closer to reality considering thermal and centrifugal effects.
Originality/value
In the past studies, the thermo-mechanical coupling characteristics research and experimental verification of angular contact ball bearing with fix-position preload are not concerned. Research findings of this paper provide theoretical guidance for spindle design.
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Melissa Rikiatou Kana Kenfack and Ali Öztüren
It is salient to be acquainted with the key elements that determine educational tourists’ decision in selecting an overseas destination while considering the rise of international…
Abstract
It is salient to be acquainted with the key elements that determine educational tourists’ decision in selecting an overseas destination while considering the rise of international competition amidst nations concerning international students. There has been a growth in the number of nations committed to attracting educational tourists. This issue is evident in countries involved in higher education (HE), such as Northern Cyprus, identified as an edu-tourism destination. Northern Cyprus can attract a whopping number of tourists, and the higher population is most likely to be made up of international students regardless of its interdiction on direct flights and political pressure. This chapter centres on analysing educational tourists’ motivators in selecting a tourism education destination abroad and on revealing effective recruitment and promotion plans towards attracting them. The chapter includes the descriptions and discussions of educational tourism, the HE industry over the years, globalisation and internationalisation of educational tourism, factors influencing educational tourists’ decision-making process and key elements influencing educational tourists’ decisions in HE institutions. At the end of the chapter, a case study is presented that reports the findings of interviews with educational tourists, overseas recruitment agents and Eastern Mediterranean University staff responsible for promoting the institution. The results identified eight factors affecting educational tourists’ decisions on study destination. Those factors comprise cost, ease of access, location, social factors, quality of education, instruction language, cultural environment and communication quality. The sub-factors of the main eight factors are scholarships, destination’s scenery, safety, friends’ and relatives’ influence and cultural differences. This chapter brings a significant knowledge about the motives that affect educational tourists in selecting at a particular HE destination. Based on the study’s findings, educational institutions may consider various recommendations to redesign their strategies towards attracting educational tourists more effectively. Generally, this study promotes an apprehension about the diverse elements that affect educational tourists’ selection of a destination study. An in-depth understanding of these factors will help education institutions’ decision-makers better develop plans of action to provide desired services to educational tourists, attract and keep them in return.
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Pingping Xiong, Yue Zhang, Bo Zeng and Tian-Xiang Yao
Aiming at the traditional multivariate grey forecasting model only considers the modelling of real numbers; therefore, the purpose of this paper is to construct an MGM(1, m) model…
Abstract
Purpose
Aiming at the traditional multivariate grey forecasting model only considers the modelling of real numbers; therefore, the purpose of this paper is to construct an MGM(1, m) model based on the interval grey number sequences according to the grey modelling theory.
Design/methodology/approach
First, the multivariable grey number sequences are transformed into the kernel and grey radius sequences which are two feature sequences of interval grey number sequences. Then the MGM(1, m) model for kernel sequences and grey radius sequences are established, respectively. Finally, the simulation and prediction of the upper and lower bounds of the interval grey number sequences are realized by the reductive calculation of the predicted values of the kernel and grey radius.
Findings
The model is applied to the prediction of visibility and relative humidity, the identification factors of the haze. The results show that the model has high accuracy on the simulation and prediction of multivariable grey number sequences, which is reasonable and practical.
Originality/value
The main contribution of this paper is to propose a method to simulate and forecast the multivariable grey number sequence that is to establish the prediction models for the whitening sequences of multivariable grey number sequences which are kernel and grey radius sequences and extend the possibility boundary of kernel by grey radius. The model can reflect the development trend of multivariable grey number sequence accurately. When the grey information is continuously complemented, the multivariable grey number prediction model is transformed into the traditional MGM(1, m) model. Therefore, the MGM(1, m) model based on interval grey number sequence is the generalisation and expansion of the traditional MGM(1, m) model.
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Bo Yang, Pingping Fu, ‘Alim J. Beveridge and Qing Qu
Through three case studies, the authors aim to examine how Confucian humanistic philosophy can be applied to leadership practices and show how it is possible to practice…
Abstract
Purpose
Through three case studies, the authors aim to examine how Confucian humanistic philosophy can be applied to leadership practices and show how it is possible to practice humanistic leadership in the Chinese context.
Design/methodology/approach
The authors use case studies of three exemplary humanistic leaders and the companies they lead to describe their leadership practices and influence on others and their companies.
Findings
The authors identify three common elements that connect their observations to an emerging scholarly conceptualization of humanistic leadership and develop a framework of Confucian humanistic leadership consisting of five attributes. The cases the authors studied suggest that the five attributes should be understood as being mutually reinforcing and acting in concert, rather than each acting independently of the others. The authors found that there is inherent consistency and connection between the core values of Confucianism and humanistic leadership.
Originality/value
The research contributes to the leadership literature, specifically the emerging literature on humanistic leadership, by introducing a framework for Confucian humanistic leadership. While much of the extant literature on humanistic leadership has been conceptual, the study shows how it is possible to practice humanistic leadership in the Chinese context by drawing on the foundation provided by Confucian humanistic philosophy. The findings also contribute to humanistic leadership research by providing important insights into specific capabilities that can help put the principles of humanistic leadership into practice, but that have not been considered to date.
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Pingping Fu, Ernst Von Kimakowitz, Michal Lemanski and Leigh Anne Liu
Abstract
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Melody P.M. Chong, Xiji Zhu, Pingping Fu and Ling Ying Sarinna Wong
Previous research on influence strategies has almost exclusively indicated negative relationships between assertive influence and employee work outcomes; the purpose of this study…
Abstract
Purpose
Previous research on influence strategies has almost exclusively indicated negative relationships between assertive influence and employee work outcomes; the purpose of this study is to argue that an assertive influence strategy can also lead to both positive and negative work outcomes, when subordinates hold different attributions towards the leaders’ motive of using assertive influence (hereafter “the cause”).
Design/methodology/approach
The empirical study was based on data collected from 930 employees in China. The authors developed hypotheses to test the mediating effects of three types of perception in the relationship between an assertive influence strategy and five outcomes, and additional analyses on persuasive and relational influence strategies are also conducted.
Findings
Results show that when subordinates attribute the cause to their ability (internal attribution), an assertive influence has indirect positive effect on felt obligation, organizational commitment, job performance and organizational citizenship behavior; when subordinates attribute the cause to the poor relationship with their superiors (relational attribution), an assertive influence has indirect negative impact on most outcomes except for job performance; when subordinates perceive that the cause is to the superiors, such as authoritarian leadership (external attribution), an assertive influence has indirect positive effect on job performance.
Practical implications
The study highlights the importance of subordinates’ perceptions during the leadership influence processes.
Originality/value
This study was the first to examine the mediation relationship between three types of influence strategies and five organizational outcomes based on a large sample of front-line staff in China. The findings of the study also enrich the literature of leadership and attribution theories.
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Pingping Xiong, Zhiqing He, Shiting Chen and Mao Peng
In recent years, domestic smog has become increasingly frequent and the adverse effects of smog have increasingly become the focus of public attention. It is a way to analyze such…
Abstract
Purpose
In recent years, domestic smog has become increasingly frequent and the adverse effects of smog have increasingly become the focus of public attention. It is a way to analyze such problems and provide solutions by mathematical methods.
Design/methodology/approach
This paper establishes a new gray model (GM) (1,N) prediction model based on the new kernel and degree of grayness sequences under the case that the interval gray number distribution information is known. First, the new kernel and degree of grayness sequences of the interval gray number sequence are calculated using the reconstruction definition of the kernel and degree of grayness. Then, the GM(1,N) model is formed based on the above new sequences to simulate and predict the kernel and degree of the grayness of the interval gray number sequence. Finally, the upper and lower bounds of the interval gray number are deduced based on the calculation formulas of the kernel and degree of grayness.
Findings
To verify further the practical significance of the model proposed in this paper, the authors apply the model to the simulation and prediction of smog. Compared with the traditional GM(1,N) model, the new GM(1,N) prediction model established in this paper has better prediction effect and accuracy.
Originality/value
This paper improves the traditional GM(1,N) prediction model and establishes a new GM(1,N) prediction model in the case of the known distribution information of the interval gray number of the smog pollutants concentrations data.
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Ji Wen, Yina Li and Pingping Hou
This study mainly aims to examine the mediating effect of perceived organizational support (POS) and the moderating effect of locus of control and job autonomy on the relationship…
Abstract
Purpose
This study mainly aims to examine the mediating effect of perceived organizational support (POS) and the moderating effect of locus of control and job autonomy on the relationship between customer mistreatment behavior and organizational citizenship behavior.
Design/methodology/approach
Through a questionnaire survey of 231 employees and their direct supervisors of five hotels in Guangzhou. This paper analyzed five variables (customer mistreatment, POS, locus of control, job autonomy and organizational citizenship behavior) relationships through a variety of data analysis.
Findings
Results indicate that customer mistreatment behavior has a negative effect on employees’ organizational citizenship behavior. The relationship between customer mistreatment behavior and employees’ organizational citizenship behavior is partially mediated by employees’ POS. Staffs’ locus of control and job autonomy can modulate the relationship between customers’ mistreatment behavior and POS. Furthermore, the indirect mediating effect of POS on customer mistreatment behavior is revealed. The organizational citizenship behavior linkage is significant only to staff who perceived they have a high level of job autonomy and a high locus of control.
Practical implications
Hotels are advised to provide organizational support and the management of customer mistreatment behavior so as to reflect their employees’ value, seek service innovation and promote production efficiency in practice. Furthermore, it maintains and promotes operational efficiency for service organizations and means the organization pays more attention to meet the social, emotional and psychological needs of its employees.
Originality/value
This article reveals the mechanism relationship between customer mistreatment behavior and employee organizational citizenship behavior. First, it defines the concept of customer mistreatment in the hotel industry and enriches the related research. Second, the study, from the perspective of customer mistreatment, has opened up a new view of organizational citizenship behavior research. Third, we built a research model and it is helpful to grasp the inner mechanism between customer mistreatment and employees’ organizational citizenship behavior. Fourth, this research benefits service organizations so as to maintain and improve their operation efficiency. Furthermore, it can have theoretical guidance for service-oriented organizations to develop a harmonious consumption culture and organizational culture.
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Jane L.Y. Terpstra Tong, David A. Ralston, Olivier Furrer, Charlotte M. Karam, Carolyn Patricia Egri, Malika Richards, Marina Dabić, Emmanuelle Reynaud, Pingping Fu, Ian Palmer, Narasimhan Srinivasan, Maria Teresa de la Garza Carranza, Arif Butt, Jaime Ruiz-Gutiérrez, Chay Hoon Lee, Irina Naoumova, Yong-Lin Moon, Jose Pla-Barber, Mario Molteni, Min Hsu Kuo, Tania Casado, Yusuf M. Sidani, Audra Mockaitis, Laurie Milton, Luiza Zatorska, Beng Chia Ho, Modestas Gelbuda, Ruth Alas and Wade Danis
We examined the attitudes of millennial-aged business students toward economic, social and environmental corporate responsibility (CR). Currently, these individuals are of an age…
Abstract
Purpose
We examined the attitudes of millennial-aged business students toward economic, social and environmental corporate responsibility (CR). Currently, these individuals are of an age that they have entered the workforce and are now ascending or have ascended into roles of leadership in which they have decision-making power that influences their company’s CR agenda and implementation. Thus, following the ecological systems perspective, we tested both the macro influence of cultural values (survival/self-expression and traditional/secular-rational values) and structural forces (income inequality, welfare socialism and environmental vulnerability) on these individuals’ attitudes toward CR.
Design/methodology/approach
This is a multilevel study of 3,572 millennial-aged students from 28 Asian, American, Australasian and European societies. We analyzed the data collected in 2003–2009 using hierarchical linear modeling.
Findings
In our multilevel analyses, we found that survival/self-expression values were negatively related to economic CR and positively related to social CR while traditional/secular-rational values was negatively related to social CR. We also found that welfare socialism was positively related to environmental CR but negatively related to economic CR while environmental vulnerability was not related to any CR. Lastly, income equality was positively related to social CR but not economic or environment responsibilities. In sum, we found that both culture-based and structure-based macro factors, to varying extents, shape the attitudes of millennial-aged students on CR in our sample.
Originality/value
Our study is grounded in the ecological systems theory framework, combined with research on culture, politico-economics and environmental studies. This provides a multidisciplinary perspective for evaluating and investigating the impact that societal (macro-level) factors have on shaping attitudes toward businesses’ engagement in economic, social and environmental responsibility activities. Additionally, our multilevel research design allows for more precise findings compared to a single-level, country-by-country assessment.