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Article
Publication date: 20 October 2011

Renkuan Guo, Danni Guo and YanHong Cui

The purpose of this paper is to propose an uncertain regression model with an intrinsic error structure facilitated by an uncertain canonical process.

Abstract

Purpose

The purpose of this paper is to propose an uncertain regression model with an intrinsic error structure facilitated by an uncertain canonical process.

Design/methodology/approach

This model is suitable for dealing with expert's knowledge ranging from small to medium size data of impreciseness. In order to have a rigorous mathematical treatment on the new regression model, this paper establishes a series of new uncertainty concepts sequentially, such as uncertainty joint multivariate distribution, the uncertainty distribution of uncertainty product variables and uncertain covariance and correlation based on the axiomatic uncertainty theoretical foundation. Two examples are given for illustrating a small data regression analysis.

Findings

The uncertain regression model is formulated and the estimation of the model coefficients is developed.

Practical implications

The paper is devoted to a regression model to handle a small amount of data with mathematical rigor.

Originality/value

The theory and the methodology of the uncertain canonical process regression is proposed for the first time. It addresses the practical challenges of small data size modelling.

Article
Publication date: 17 August 2021

Yuanhang Yang, Gang Feng, Yanhong Gu, Jie Zhao and Jian Liang

Aluminum alloy is susceptible to chloride ion attack in sea water, resulting in pitting damage and hence serious security risks for the related applications. To improve…

Abstract

Purpose

Aluminum alloy is susceptible to chloride ion attack in sea water, resulting in pitting damage and hence serious security risks for the related applications. To improve the corrosion resistance of Al alloy, micro-arc oxidation (MAO) technology has been developed to produce a protective dense oxide layer on top of Al alloy. However, the mechanism of MAO-induced corrosion resistance is still not fully understood, particularly on local corrosion issue. This paper aims to focus on comprehensively studying the corrosion-resistance mechanism by a series of technologies.

Design/methodology/approach

The corrosion behavior of samples was studied by open circuit potential (OCP), potentiodynamic polarization (PDP), electrode impedance spectroscopy (EIS) and localized electrode impedance spectroscopy (LEIS) tests in NaCl solution.

Findings

The MAO-coated Al alloy shows a more positive corrosion potential and a higher corrosion current density compared to the untreated counterpart, indicating a significantly enhanced corrosion-resistance. The study of surface morphology and structure also suggest significantly enhanced corrosion-resistance due to the MAO treatment.

Originality/value

Based on the results, a new corrosion model was proposed to describe the influence of MAO treatment on the corrosion process and corrosion mechanism of Al alloy, providing insights on the design of the corrosion-resistance coating for metallic alloys in marine applications.

Details

Anti-Corrosion Methods and Materials, vol. 68 no. 5
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 28 July 2022

Yida Liu, Jie Zhao, Xiaoyu Yang, Yanhong Gu and Zihao Yang

The purpose of this paper is to improve the corrosion resistance of the 6061-Al alloy as the battery pack material for electric vehicles, and the nano-SiC/MAO composite…

Abstract

Purpose

The purpose of this paper is to improve the corrosion resistance of the 6061-Al alloy as the battery pack material for electric vehicles, and the nano-SiC/MAO composite coating was prepared.

Design/methodology/approach

The corrosion resistance of coatings was evaluated by the global electrochemical test, and the local electrochemical impedance spectroscopy (LEIS) was used to study the local corrosion mechanism. The laser confocal microscope, scanning electron microscope and X-ray diffractometer (XRD) were used to characterise coatings.

Findings

Results showed that the impedance of nano-SiC/MAO coating was 1–2 times higher than MAO coating, and the main corrosion product was Al(OH)3. LEIS results showed that the impedance of the nano-SiC/MAO coating was two times higher than the MAO coating. The defective SiC/Micro-arc oxidation coating still had high corrosion resistance compared to the MAO coating.

Originality/value

The physical model of the local corrosion mechanism for SiC/MAO composite coating in “cavity-fracture collapse” mode was proposed.

Details

Anti-Corrosion Methods and Materials, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 1 March 2022

Jiawei Xu, Yubing Yu, Ye Wu, Justin Zuopeng Zhang, Yulong Liu, Yanhong Cao and Prajwal Eachempati

The paper aims to study the relationship between corporate social responsibility, green supply chain management, and operational performance and the moderating effects of…

Abstract

Purpose

The paper aims to study the relationship between corporate social responsibility, green supply chain management, and operational performance and the moderating effects of relational capital on these relationships.

Design/methodology/approach

The authors conduct an empirical study with a structural equation modeling approach to investigate the relationship between corporate social responsibility—constructed by the quality and environmental responsibility, green supply chain management—including green supplier and customer management and operational performance—manifested by quality, cost, flexibility, and delivery performance using data from 308 manufacturers in China. Besides, the authors explore the moderating effect of supplier and customer relational capital on these relationships.

Findings

The findings indicate that a company's quality and environmental responsibility significantly impacts its green supply chain management practices, which further improve its operational performance in quality, cost, flexibility, and delivery. In addition, supplier and customer relational capital strengthens the influence of environmental responsibility on green supply chain management. While supplier relational capital reinforces the impact of green supplier management on flexibility and delivery performance, customer relational capital only strengthens the influence of green customer management on flexibility performance.

Originality/value

The study enriches the extant literature by developing a holistic framework integrating corporate social responsibility, green supply chain management, relational capital, and operational performance and unraveling their intricate relationships. The authors’ findings help practitioners prioritize proactive steps in environmental conservation more than achieving operational performance.

Details

Journal of Enterprise Information Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1741-0398

Keywords

Article
Publication date: 6 May 2014

Hui Fu, Yaoqi Li and Yanhong Duan

The purpose of this study is to propose and verify a research model that investigates the mediating role of organizational commitment on the relationship between hotel…

2358

Abstract

Purpose

The purpose of this study is to propose and verify a research model that investigates the mediating role of organizational commitment on the relationship between hotel employee-perceived reputation and organizational citizenship behaviors (OCBs).

Design/methodology/approach

Based on the data obtained from a sample of 323 hotel employees in China, the reliability, validity and hypothesized relationships in the model were tested through structural equation modeling using LISREL 8.70.

Findings

Empirical results show that different dimensions of corporate reputation affect OCBs differently. Social responsibility reputation has both direct and indirect effects on OCBs, while there is no direct link between employee-treatment reputation and OCBs. The relationship between corporate reputation and OCBs is mediated by organizational commitment.

Practical implications

Hotel managers should pay more attention to employee perception of the hotel’s reputation. Reputation management is as important as reputation building. Favorable perception of hotel’s reputation contributes to positive behavioral intentions.

Originality/value

Most recent research has explored the relationship between corporate reputation and customer behaviors. However, few studies take employee perception of reputation into consideration. This study tried to fill this void. Also, this study contributes to the current knowledge of both the reputation literature and citizenship literature by exploring the mediation of organizational commitment on the relationship between employee-perceived reputation and citizenship behaviors through data obtained from Chinese hotels.

Details

International Journal of Contemporary Hospitality Management, vol. 26 no. 4
Type: Research Article
ISSN: 0959-6119

Keywords

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