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Article
Publication date: 27 June 2018

Xia He, Wenling Liao, Guorong Wang, Lin Zhong and Mengyuan Li

The purpose of this study is to investigate the influence of texture on hydrodynamic lubrication performance of slide surface from the perspective of skewness and kurtosis.

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Abstract

Purpose

The purpose of this study is to investigate the influence of texture on hydrodynamic lubrication performance of slide surface from the perspective of skewness and kurtosis.

Design/methodology/approach

Hydrodynamic lubrication theoretical model of textured surface was established based on two-dimensional Reynolds equation, and finite difference algorithm was used as the numerical approach in the paper. Skewness and kurtosis of surface were obtained by discrete calculation.

Findings

Numerical analysis results show that the influence law of texture types on skewness, kurtosis and hydrodynamic lubrication was the more negative skewness and higher kurtosis, the better hydrodynamic lubrication performance when texture cross section contour and geometric parameters were the same. Similarly, the same influence law of skewness, kurtosis and hydrodynamic lubrication performance by texture cross-section contour was observed. However, it was unable to evaluate the effect of texture angle on hydrodynamic lubrication performance of textured surface from the perspective of skewness and kurtosis.

Originality/value

This paper confirms the feasibility of evaluating influence of texture types and texture cross-section contour on hydrodynamic lubrication performance from the perspective of skewness and kurtosis and provides a way to optimize texture type and texture cross section.

Details

Industrial Lubrication and Tribology, vol. 70 no. 5
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 3 November 2023

Yinan Chen, Dehong Huo, Guorong Wang, Lin Zhong and Zheng Gong

This paper aims to combine the grooves with an annular air thrust bearing with multi-hole restrictors and discusses the influence of the groove parameters on the bearing…

151

Abstract

Purpose

This paper aims to combine the grooves with an annular air thrust bearing with multi-hole restrictors and discusses the influence of the groove parameters on the bearing performance.

Design/methodology/approach

Four models of aerostatic bearings with grooves of different geometries are established. The pressure distribution, load-carrying capacity (LCC), stiffness and flow characteristics of the flow field in the bearing clearances are obtained by computational fluid dynamics simulation.

Findings

The numerical and simulation results show that air bearing with grooved restrictors can slow down the pressure drop at the air inlet and increase the LCC and stiffness of the bearing. The gas flow in the aerostatic bearing is also studied, and the air vortex in the recess is analyzed.

Originality/value

This research optimizes the structure of the annular air thrust bearing, analyzes the gas vortex in the recess, improves the LCC and stiffness of the bearing and provides a reference for the bearing in the selection of groove parameters.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2023-0006/

Details

Industrial Lubrication and Tribology, vol. 75 no. 10
Type: Research Article
ISSN: 0036-8792

Keywords

Available. Open Access. Open Access
Article
Publication date: 14 September 2015

Xia He, Lin Zhong, Guorong Wang, Yang Liao and Qingyou Liu

This paper aims to carry out tribological experiments to explore the applications of femtosecond laser surface texturing technology on rock bit sliding bearing to enhance the…

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Abstract

Purpose

This paper aims to carry out tribological experiments to explore the applications of femtosecond laser surface texturing technology on rock bit sliding bearing to enhance the lifetime and working performance of rock bit sliding bearing under high temperature and heavy load conditions.

Design/methodology/approach

Surface textures on beryllium bronze specimen were fabricated by femtosecond laser ablation (800 nm wavelength, 40 fs pulse duration, 1 kHz pulse repetition frequency), and then the tribological behaviors of pin-on-disc configuration of rock bit bearing were performed with 20CrNiMo/beryllium bronze tribo-pairs under non-Newtonian lubrication of rock bit grease.

Findings

The results showed that the surface texture on beryllium bronze specimens with specific geometrical features can be achieved by optimizing femtosecond laser processing via adjusting laser peak power and exposure time; more than 52 per cent of friction reduction was obtained from surface texture with a depth-to-diameter ratio of 0.165 and area ratio of 5 per cent at a shear rate of 1301 s−1 under the heavy load of 20 MPa and high temperature of 120°C, and the lubrication regime of rock bit bearing unit tribo-pairs was improved from boundary to mixed lubrication, which indicated that femtosecond laser ablation technique showed great potential in promoting service life and working performance of rock bit bearing.

Originality/value

Femtosecond laser-irradiated surface texture has the potential possibility for application in rock bit sliding bearing to improve the lubrication performance. Because proper micro dimples showed good lubrication and wear resistance performance for unit tribo-pairs of rock bit sliding bearing under high temperature, heavy load and non-Newtonian lubrication conditions, which is very important to improve the efficiency of breaking rock and accelerate the development of deep-water oil and gas resources.

Details

Industrial Lubrication and Tribology, vol. 67 no. 6
Type: Research Article
ISSN: 0036-8792

Keywords

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Article
Publication date: 7 August 2023

Guorong Zhu, Lan Wang and Douglas T. Hall

This paper employs human resources (HR) analytics to investigate the pathways through which high-potential managers ascend to C-suite positions, and how different developmental…

549

Abstract

Purpose

This paper employs human resources (HR) analytics to investigate the pathways through which high-potential managers ascend to C-suite positions, and how different developmental paths influence turnover among executives.

Design/methodology/approach

By combining job analysis and competency assessment with sequence analysis, the authors utilize HR analytics to analyze the work experiences of 53 general managers spanning 57 years (n = 2,742), encompassing various roles, job requirements, and 20 executive competencies attached to over 1,000 positions.

Findings

This study's findings reveal three distinct developmental paths that lead to the C-suite, characterized by differences in the content, context, timing, and complexity of work experience. Furthermore, the authors identify that a more complex developmental path tends to reinforce executives' competency in self-awareness while inhibiting their development of technical competency, ultimately resulting in reduced executive turnover.

Originality/value

By employing HR analytics to analyze empirical data embedded in job and organizational contexts, this study sheds light on the critical role of timing and complexity of work experiences in executive development. It also offers practical implications for firms seeking to optimize their leadership pipeline and reduce executive turnover by leveraging HR analytics effectively.

Details

International Journal of Manpower, vol. 44 no. 7
Type: Research Article
ISSN: 0143-7720

Keywords

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Article
Publication date: 14 March 2023

Rafedzah Mohd Som, Ismi Arif Ismail, Zoharah Omar, Siti Noormi Alias and Soaib Asimiran

This study aims to test a public–private partnership (PPP) success model by examining the direct effects of two input factors (facilitative leadership and communication quality…

640

Abstract

Purpose

This study aims to test a public–private partnership (PPP) success model by examining the direct effects of two input factors (facilitative leadership and communication quality) on an outcome factor, namely, PPP success (PPP project success and PPP relational success), as well as the mediating effect of trust as a process factor on these relationships.

Design/methodology/approach

The present research uses the sociotechnical systems theory as the guiding framework. This is a quantitative study that uses a questionnaire survey and purposive sampling. The respondents comprise 266 public and private sector employees who have been involved in various PPP projects. The data gathered from the survey are analysed using SPSS and structural equation modelling (AMOS version 23.0).

Findings

The findings of this study indicate that facilitative leadership, communication quality and trust are positively correlated with PPP success, that is, PPP relational and PPP project success. Trust is found to mediate the relationship between facilitative leadership and communication quality with PPP success.

Practical implications

This paper upholds the importance of facilitative leadership, communication quality and trust in a PPP setting.

Originality/value

This study enriches the knowledge of PPP projects regarding facilitative leadership, communication quality and trust. It also discusses the vital role of these variables in ensuring PPP success.

Details

Journal of Asia Business Studies, vol. 17 no. 5
Type: Research Article
ISSN: 1558-7894

Keywords

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Case study
Publication date: 2 April 2015

Guorong Zhu

Gloria Chen, an American educated Chinese management consultant, was asked by China Mobile, a leading telecommunication company, to deliver training on career management…

Abstract

Synopsis

Gloria Chen, an American educated Chinese management consultant, was asked by China Mobile, a leading telecommunication company, to deliver training on career management. Following her own training in the USA, the consultant developed a three-day training program that focussed on deep reflection of who you are and what legacy you want to leave. Much to her surprise, participants reacted strongly to the training with emotional reactions and expressed desires for career change. The consultant, therefore, had to reflect upon the design of the training program and the disconnect between the approach and the context across international borders. This case, written on the basis of first-hand experience, presents a dilemma in training and development where western concepts meet an eastern audience and cultural incongruence brings up new challenges. It is intended for undergraduate and graduate students who are taking training and development courses or international business courses with regard to cultural differences.

Research methodology

This case was based on the author's first-hand experience of delivering training and development programs to China Mobile, with supplemental information including company background and executive quotations provided directly by the client. Video recording of the training program as the author experienced it is available for review and clips from the video may be used to assist teaching this case.

Relevant courses and levels

This case is a Training and Development Case written for use by undergraduate students in Human Resources (HR) Management classes. It can be used more broadly in international HR, International Management, or International Business where cultural differences might be a sizable component. For the topic of training and development, the students are expected to have learned about identifying training needs, theories of learning, different training approaches, and started to explore transferring the learning into international context. For the broader topic of cultural differences and international business, the students are expected to have learned about the different manifest of culture, especially social norms related to expression of emotions, as well as inter-cultural experiences for business people working overseas.

Theoretical bases

Learning styles and training approaches. Learning styles refer to the various ways of learning particular to an individual, that are presumed to allow that individual to learn best. Most people prefer an identifiable method of interacting with, taking in, and processing stimuli or information (Ackerman et al., 1989; Pashler et al., 2009). Based on this idea, successful delivery of training needs to take into consideration the learning styles of participants involved.

Details

The CASE Journal, vol. 11 no. 2
Type: Case Study
ISSN: 1544-9106

Keywords

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Article
Publication date: 31 August 2012

Dominique Jolly and Fuquan Zhu

Chinese S&T parks are one component of the Chinese system of innovation which has emerged over the last 20 years; they are not simply a copy‐paste of the American model. This

617

Abstract

Purpose

Chinese S&T parks are one component of the Chinese system of innovation which has emerged over the last 20 years; they are not simply a copy‐paste of the American model. This paper aims to focus on this topic.

Design/methodology/approach

Developments were inferred from an extensive literature review (in English, in Chinese and in French) that was completed by an archive research as well as interviews of heads of Chinese S&T parks.

Findings

Six features make Chinese S&T parks different from what can be found elsewhere in the world: the Chinese people have the willingness to restore previous glory and share of the world economy; the Chinese government apparatus acts as the driving force with an overpowering impact; there are very few foreign companies in Chinese S&T parks – making those parks mostly inhabited by Chinese companies, but returnees play a significant role; an astonishing scale when benchmarked to European references; the greening of business has emerged as a new and powerful driver; and an evolutionary process is leading to the transformation of China into an innovative country.

Research limitations/implications

This paper stands more as an essay reflecting the authors' understanding of the Chinese situation and, as such, it may be subjectively biased.

Practical implications

As Western managers are now considering China as a possible place to carry R&D, this paper helps them to get a better understanding of the features of the specific locations where they might implement their R&D labs.

Originality/value

The emergence of China as a technological country is a recent phenomenon. The authors have identified no such analysis in the published literature.

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Book part
Publication date: 9 August 2016

Abstract

Details

Advances in Global Leadership
Type: Book
ISBN: 978-1-78635-138-8

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Book part
Publication date: 1 January 2014

Abstract

Details

Advances in Global Leadership
Type: Book
ISBN: 978-1-78350-479-4

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Book part
Publication date: 18 April 2012

Abstract

Details

Advances in Global Leadership
Type: Book
ISBN: 978-1-78052-002-5

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