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Article
Publication date: 16 October 2018

Wenxiong Lin, Huagang Liu, Haizhou Huang, Jianhong Huang, Kaiming Ruan, Zixiong Lin, Hongchun Wu, Zhi Zhang, Jinming Chen, Jinhui Li, Yan Ge, Jie Zhong, Lixin Wu and Jie Liu

The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the…

Abstract

Purpose

The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the oxygen-permeable window, which is prepared by irradiating polyethylene terephthalate membranes with accelerated heavy ions.

Design/methodology/approach

Experimental approaches are carried out to characterize printing parameters of resins with different photo-initiator concentrations by a photo-polymerization matrix, to experimentally observe and theoretically fit the oxygen inhibition layer thickness during printing under conditions of pure oxygen and air, respectively, and to demonstrate the enhanced CLIP processes by using pure oxygen and air, respectively.

Findings

Owing to the high permeability of track-etched membrane, CLIP process is demonstrated with printing speed up to 800 mm/h in the condition of pure oxygen, which matches well with the theoretically predicted maximum printing speed at difference light expose. Making a trade-off between printing speed and surface quality, maximum printing speed of 470 mm/h is also obtained even using air. As the oxygen inhibition layer created by air is thinner than that by pure oxygen, maximum speed cannot be simply increased by intensifying the light exposure as the case with pure oxygen.

Originality/value

CLIP process is capable of building objects continuously instead of the traditional layer-by-layer manner, which enables tens of times improvement in printing speed. This work presents an enhanced CLIP process by first using a porous track-etched membrane to serve as the oxygen permeable window, in which a record printing speed up to 800 mm/h using pure oxygen is demonstrated. Owing to the high permeability of track-etched membrane, continuous process at a speed of 470 mm/h is also achieved even using air instead of pure oxygen, which is of significance for a compact robust high-speed 3D printer.

Details

Rapid Prototyping Journal, vol. 25 no. 1
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 20 October 2022

Xiaoguang Zhou, Yuxuan Lin and Jie Zhong

China's stock market, which serves as an example of emerging markets, is steadily maturing in the context of globalization. In order to analyze the pricing mechanism of…

Abstract

Purpose

China's stock market, which serves as an example of emerging markets, is steadily maturing in the context of globalization. In order to analyze the pricing mechanism of China's stock market, this paper builds a six-factor model to address the market features that are structurally efficient but not entirely efficient.

Design/methodology/approach

This study updates the Fama–French factor model's construction process to account for the unique features of China's stock market before creating a model that incorporates size, volume, value, profitability, and profit-income factors based on institutional investors' trading behavior and research preferences. The SWS three-tier sector stock index's monthly and quarterly data for the years 2016–2021 are used as samples for this study.

Findings

The results imply that China's stock market is structurally efficient and exhibits high levels of rationality in the region dominated by institutional investors. Specifically, big-size and high-volume portfolios that perform well in terms of liquidity can receive trading premiums. Growth-style sectors prevail at present, and investing in sectors with strong profitability and reliable financial reporting data can produce better returns.

Practical implications

The research on China's stock market can be extended to improve the understanding of the development process of similar emerging markets, thereby promoting their improvement. To enhance the development of emerging markets, the regulators should attach great importance to the role of local institutional investors in driving the market to maturity. It is crucial to adopt a structured approach to examine the market pricing mechanism throughout the middle stage of the transition from developing to mature markets.

Originality/value

This study offers a structured viewpoint on asset pricing in growing emerging markets by combining the multi-factor pricing model approach with behavioral finance theories.

Details

International Journal of Emerging Markets, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1746-8809

Keywords

Article
Publication date: 16 May 2022

Jie Zhong, Li Zhang and Guang Xu

The purpose of this research is to explore the relationship between supervisor-subordinate Guanxi (SSG) and employee affective commitment. Integrating social exchange…

Abstract

Purpose

The purpose of this research is to explore the relationship between supervisor-subordinate Guanxi (SSG) and employee affective commitment. Integrating social exchange theory (SET) with conservation of resource (COR) theory, this paper explores the mixed effect of SSG on affective commitment as well as the moderating roles of an individual difference (subordinate work ethic) and a contextual variable (procedural fairness).

Design/methodology/approach

This research adopted a survey involving 249 subordinates to test the hypothesized model.

Findings

The results showed that the relationship between SSG and affective commitment was inverted U-shaped, and this relationship was moderated by work ethic and procedural fairness, respectively.

Research limitations/implications

Despite those contributions listed above, there are still some limitations that future research should seek to address. First, the data of this research are cross-sectional, which might cause common method bias to responses. However, all the hypotheses are higher-order forms of the main effects (curvilinear and moderating effects), which are not affected by the cross-sectional nature of the study (Podskoff et al., 2003). Moreover, given these variables in the model are related to subordinates' internal psychological states or perceptions, data for the study should be collected from subordinates. Relatedly, the cross-sectional nature of the dataset may raise a question about the directionality of the relationships. However, the research model is based on strong theories (i.e. SET and COR theory). In addition, prior research has indicated that Guanxi has an influence on commitment, not vice versa (Cheung et al., 2009; Chen and O'Leary, 2018). However, given that only experimental design can conclusively prove the directionality of the relationship, the authors encourage to replicate the current study using such a design. In addition, the authors encourage future studies to collect longitudinal data and replicate the current study. Second, this study only tested how work ethic and procedural fairness moderated the relationship between SSG and affective commitment. The authors encourage future research to explore the moderating effect of other moderators, such as the integrity of supervisors. In particular, when the supervisor has a high level of integrity, the negative influence of higher SSG may be weakened. Third, this study did not explore the mechanism linking SSG with affective commitment. Future studies should explore the potential mechanisms. For example, subordinates' emotional exhaustion might be the potential mechanism between SSG and affective commitment.

Practical implications

The results imply that supervisors should treat SSG as a double-edged sword and maximize the positive influence of SSG. In addition, organizations should hire individuals with high work ethic or provide related training. At last, organizations should realize the importance of procedural fairness and set a sector that oversees making and executing well-designed roles.

Originality/value

Previous studies on SSG mainly focused on its positive effect on affective commitment, neglecting to explore its negative effect. This paper helped to illustrate the relationship between SSG and affective commitment comprehensively by indicating the relationship between SSG and affective commitment was inverted U-shaped and moderated by work ethic and procedural fairness, respectively.

Details

Leadership & Organization Development Journal, vol. 43 no. 4
Type: Research Article
ISSN: 0143-7739

Keywords

Article
Publication date: 15 January 2020

Jie Zhong, Li Zhang, Ping Li and Duo Zhen Zhang

The purpose of this paper is to explore the relationship between leader humility and employee well-being. Based on social information processing (SIP) theory and previous…

1863

Abstract

Purpose

The purpose of this paper is to explore the relationship between leader humility and employee well-being. Based on social information processing (SIP) theory and previous literature concerning leader humility, this paper identifies employee humility as the mediator and suggests that perceived leader effectiveness moderates these relationships.

Design/methodology/approach

This study employed a survey involving 228 employees to test the hypothesized moderated-mediation model.

Findings

Leader humility is positively related to employee well-being. Employee humility mediates leader humility and employee well-being, except for emotional exhaustion. Moreover, the effect of leader humility on employee humility and the indirect effect of leader humility on employee job satisfaction and work engagement are stronger under high perceptions of leader effectiveness.

Originality/value

Based on the framework of SIP theory, this paper contributes to the literature on humble leadership and employee well-being by treating employee humility as the mechanism and perceived leader effectiveness as the moderator. Few previous studies have investigated the influence of leader humility on employee well-being.

Details

Leadership & Organization Development Journal, vol. 41 no. 1
Type: Research Article
ISSN: 0143-7739

Keywords

Article
Publication date: 10 November 2020

Weiling Tuo, Shun'an Cao and Jie Zhong

The purpose of this study was to investigate the corrosion of low molecular organic acids from water-steam cycles such as acetic acid and formic acid in mental parts of…

Abstract

Purpose

The purpose of this study was to investigate the corrosion of low molecular organic acids from water-steam cycles such as acetic acid and formic acid in mental parts of steam turbine initial condensation zone.

Design/methodology/approach

The corrosion behavior of gray cast iron in initial condensate containing different concentrations of acetic acid and formic acid was studied by weight loss test, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction.

Findings

The results indicated that gray cast iron had a certain degree of corrosion in the simulated initial condensate containing acetic acid and formic acid, but the acid corrosion of gray cast iron was not only caused by low molecular organic acid but also affected by inorganic anions such as Cl. When Cl existed, after removing corrosion products, surface analysis results proved that the surface of gray cast iron was rough and uneven with many cracks, which was corrected more serious.

Originality/value

The corrosion behavior of thermal equipment by low molecular organic acids and inorganic anions in water-steam cycles was studied. The research results can provide theoretical guidelines for corrosion control of steam turbine in power plants.

Details

Anti-Corrosion Methods and Materials, vol. 67 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 6 April 2020

Jing Yang, Jie Zhong, Fang Xie, Xiaoyang He, Liwen Du, Yaqian Yan, Meiyu Li, Wuqian Ma, Wenxin Wang and Ning Wang

The purpose of this work is to controllably synthesize a carbon aerogel with programmable functionally graded performance via a simple and effective strategy.

Abstract

Purpose

The purpose of this work is to controllably synthesize a carbon aerogel with programmable functionally graded performance via a simple and effective strategy.

Design/methodology/approach

This work uses polyvinyl alcohol (PVA) via the controllable sol-gel, lyophilization, and carbonization approach to achieve a programmable carbon aerogel. This design has the advantages of low raw material and preparation cost, simple and controllable synthetic process and low carbonization temperature.

Findings

The thermal stability and microstructure of PVA aerogel can be controlled by the crosslinking agent content within a certain range. The crosslinking agent content and the carbonization temperature are the key factors for functionally graded programming of carbon aerogels, including microstructure, oxygen-containing functional groups and adsorption performance. The adsorption ratio and adsorption rate of uranium can be controlled by adjusting initial concentration and pH value of the uranium solution. The 2.5%25 carbon aerogel with carbonization temperature of 350 °C has excellent adsorption performance when the initial concentration of uranium solution is 32 ppm at pH 7.5.

Research limitations/implications

As a new type of lightweight nano-porous amorphous carbon material, this carbon aerogel has many excellent properties.

Originality/value

This work presents a simple, low cost and controllable strategy for functionally graded programming of novel carbon aerogel. This carbon aerogel has great potential for application in various fields such as uranium recovery, wastewater treatment, sound absorption and shock absorption.

Details

Pigment & Resin Technology, vol. 50 no. 5
Type: Research Article
ISSN: 0369-9420

Keywords

Book part
Publication date: 18 July 2018

Mengwei Tu

Abstract

Details

Education, Migration and Family Relations between China and the UK: The Transnational One-Child Generation
Type: Book
ISBN: 978-1-78714-673-0

Article
Publication date: 22 November 2011

Dong Kong and JunJie Zhang

Established on the detailed exploration of Chinese ancient management philosophies (CAMPs), the purpose of this paper is to extract enlightenments from CAMPs to see…

1516

Abstract

Purpose

Established on the detailed exploration of Chinese ancient management philosophies (CAMPs), the purpose of this paper is to extract enlightenments from CAMPs to see whether there exist some similarities between CAMPs and contemporary human resources management thoughts (CHRMTs) and pinpoint CAMPs' implications on human resource management practices nowadays.

Design/methodology/approach

Inspired by Lao Tzu's “When we can lay hold of the Dao of old to direct the things of the present day, and are able to know it as it was of old in the beginning, this is called (unwinding) the clue of Dao”, the paper explores, categorizes and integrates wisdom stemmed from CAMPs to evaluate whether there exist some commonly accepted arguments between CAMPs and CHRMTs.

Findings

CAMPs which have been passed on by generations for the past 2,500 years in China provide firm ground for human resources management thoughts and practices development; CAMPs' emphasis on people's well cultured morality and highly developed virtues has kindled a light to illuminate human resources management practices, not only in the past but also in the future. CHRMTs' principles concerning “people‐centered strategies”, employee recruitment and selection strategies, employee training and education strategies, staffing as well as employee retention strategies, can all trace their sources from CAMPs.

Originality/value

The research on CAMPs is not only significant to complement and extend CHRMTs but also useful to direct current human resource management practices.

Article
Publication date: 26 July 2021

Yan Liu, Yanzhen Liu and Guochang Lin

This study aims to investigate the basic mechanical properties of inflatable antenna reflector material under high-low temperatures.

Abstract

Purpose

This study aims to investigate the basic mechanical properties of inflatable antenna reflector material under high-low temperatures.

Design/methodology/approach

Uniaxial tensile tests of Kapton (polyimide) foils were conducted in this paper. Kapton foils with a thickness of 25 µm were used and the strip specimens were manufactured according to the machine direction and the transverse direction of the foils.

Findings

The stress–strain curves of the foils were obtained under ten temperature conditions (−70°C, −40°C, −10°C, 0°C, 20°C, 50°C, 80°C, 110°C, 140°C, 170°C) after uniaxial tensile tests. Generally speaking, such stress–strain curves are highly nonlinear, and Kapton can be classified into some kind of ductile material without obvious yielding point.

Practical implications

The tests results provide a basis for partial coefficients of Kapton foils strength design value, and meanwhile provide basic material data for the extreme temperature field test in orbit for the inflatable antenna structure in the future.

Originality/value

Based on the curve itself and strain energy theory, for the first time the equivalent yielding point was determined and the mechanism of constitutive curve changing with temperature was explained. Based on curves above, tensile strength, elongation at break, equivalent yielding stress, yielding strain and elastic modulus were analyzed and calculated. By analyzing the mechanical parameters above, the fitting formulas with temperature as the variable were given.

Details

Aircraft Engineering and Aerospace Technology, vol. 93 no. 6
Type: Research Article
ISSN: 1748-8842

Keywords

Book part
Publication date: 30 May 2022

Sam Yuqing Li and Qingwen Xu

Building social capital between groups of people and developing social enterprises that integrate social goals into commercial business models are rapidly adopted as…

Abstract

Building social capital between groups of people and developing social enterprises that integrate social goals into commercial business models are rapidly adopted as innovative poverty relief mechanisms across countries. Together, the translation of social relationships into increased accessibility to resources, and the entrepreneurial dynamics resulting in additional services and goods, are thought to meet the survival and developmental needs of poor families and communities. However, the socio-economic contexts, in which new public policies and initiatives have been taken, vary from country to country. In China, its strong Confucian culture, state-led development strategy, weak civil society, and hierarchical social relationships have contributed to a value structure of social capital, but decreased the efficiency of business practice in social enterprise. This chapter presents a case study of Rural Cooperative Program, a poverty relief initiative in China’s southwest Guizhou Province. With the introduction of China’s new policies in welfare and rural development, this chapter presents evaluation results of whether social enterprises and entrepreneurship can improve poor villagers’ socio-economic wellbeing and promote sustainable development of poor rural villages in China, and to what extent social capital has been mobilized to facilitate the Rural Cooperative Program.

1 – 10 of 165