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Article
Publication date: 20 September 2019

Mei Yang, Tingyu Huang, Ning Tang, Ben Ou and Wenhao Zhang

This paper aims to investigate the photocatalytic activity of zinc doped MAO-TiO2 films under the optimum MAO treatment condition.

Abstract

Purpose

This paper aims to investigate the photocatalytic activity of zinc doped MAO-TiO2 films under the optimum MAO treatment condition.

Design/methodology/approach

The coating was prepared by micro arc oxidation, and the influence of doping on the properties of the coating was also investigated.

Findings

The results show that the BET surface area is 78.25±0.03m2/g, total pore area is 76.32 ± 0.04m2/g, and the total pore volume is 0.2135 ± 0.0004cm3/g. The degradation ratio of the film electrode with Zn-doped in methyl orange solution is up to 94%. When the react circles is 10 times, the degradation ratio is up to more than 85% and remains steady. With the different reaction conditions, these kinetics of the reactions show some different formulas.

Originality/value

A kinetic equation for photocatalytic activity is established.

Details

Pigment & Resin Technology, vol. 48 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 7 October 2014

Baiyin Yang and Zhequn Mei

The purpose of this paper is to examine a Chinese indigenous concept of organizational ownership behavior (OOB) as an aspect of employee suzhi in relation to…

Abstract

Purpose

The purpose of this paper is to examine a Chinese indigenous concept of organizational ownership behavior (OOB) as an aspect of employee suzhi in relation to organizational citizenship behavior (OCB) in the Western context.

Design/methodology/approach

A content analysis based on a review of related research in Western mainstream and Chinese domestic literature is conducted.

Findings

Suzhi at the organizational level can be linked to the construct of OCB. In Chinese organizations, a relevant concept to OCB can be better understood as OOB to capture the sociopolitical and cultural context unique to Chinese organizations. The dimensional structure of OOB is presented to differentiate it from OCB which is popular in the Western context.

Research limitations/implications

The identified construct of OOB offers important implications for indigenous Chinese management research and human resources management (HRM) practice. OOB, based on Chinese management practice, can better conform to China’s unique historical and cultural context and management practices. This concept varies distinctively from Western OCB in terms of its connotation and dimensions.

Originality/value

The concept of OOB as an indigenous employee organizational behavior in the Chinese context is conceptualized. The paper differentiates the OOB construct from OCB and presents an initial set of six dimensions of OOB for future research.

Details

Journal of Chinese Human Resource Management, vol. 5 no. 2
Type: Research Article
ISSN: 2040-8005

Keywords

Article
Publication date: 2 August 2019

Mengna Cai, Hongyan Tian, Haitao Liu and Yanhui Qie

With the development of the modern technology and aerospace industry, the noise pollution is remarkably affecting people’s daily life and has been become a serious issue…

Abstract

Purpose

With the development of the modern technology and aerospace industry, the noise pollution is remarkably affecting people’s daily life and has been become a serious issue. Therefore, it is the most important task to develop efficient sound attenuation barriers, especially for the low-frequency audible range. However, low-frequency sound attenuation is usually difficult to achieve for the constraints of the conventional mass-density law of sound transmission. The traditional acoustic materials are reasonably effective at high frequency range. This paper aims to discuss this issue.

Design/methodology/approach

Membrane-type local resonant acoustic metamaterial is an ideal low-frequency sound insulation material for its structure is simple and lightweight. In this paper, the finite element method is used to study the low-frequency sound insulation performances of the coupled-membrane type acoustic metamaterial (CMAM). It consists of two identical tensioned circular membranes with fixed boundary. The upper membrane is decorated by a rigid platelet attached to the center. The sublayer membrane is attached with two weights, a central rigid platelet and a concentric ring with inner radius e. The influences of the distribution and number of the attached mass, also asymmetric structure on the acoustic attenuation characteristics of the CMAM, are discussed.

Findings

In this paper, the acoustic performance of asymmetric coupled-membrane metamaterial structure is discussed. The influences of mass number, the symmetric and asymmetry structure on the sound insulation performance are analyzed. It is shown that increasing the number of mass attached on membrane, structure exhibits low-frequency and multi-frequency acoustic insulation phenomenon. Compared with the symmetrical structure, asymmetric structure shows the characteristics of lightweight and multi-frequency sound insulation, and the sound insulation performance can be tuned by adjusting the distribution mode and location of mass blocks.

Originality/value

Membrane-type local resonant acoustic metamaterial is an ideal low-frequency sound insulation material for its structure is simple and lightweight. How to effectively broaden the acoustic attenuation band at low frequency is still a problem. But most of researchers focus on symmetric structures. In this study, the asymmetric coupled-membrane acoustic metamaterial structure is examined. It is demonstrated that the asymmetric structure has better sound insulation performances than symmetric structure.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 20 September 2018

Hongyan Tian, Ding Tong and Yourui Tao

Membrane-type acoustic metamaterials (MAMs) recently have been emerged to display useful sound attenuation properties in a low-frequency regime. The purpose of this paper…

Abstract

Purpose

Membrane-type acoustic metamaterials (MAMs) recently have been emerged to display useful sound attenuation properties in a low-frequency regime. The purpose of this paper is to present an analytical approach to investigate the transmission loss (TL) of a square membrane-ring structure of MAM. The geometrical effects of ring mass on the TL peak and dip frequencies of the MAM are obtained and discussed.

Design/methodology/approach

In this paper, based on the wave propagation and vibration theory, considering the effects of ring mass and acoustic pressure on the membrane, an analytical model is presented to analyze acoustic response of MAM.

Findings

Multiple peak frequencies and wide bandwidth appear in the membrane-ring structure, and they can be tuned by changing the location or numbers of the ring mass on the membrane. It is a useful method for designing such type of metamaterial.

Originality/value

In this paper, an analytical method is presented to evaluate the effects of ring geometric on the TL performance of square membrane-type locally resonant metamaterial. It is proved that achieving broadband and multi-peak TL profile in a single cell can indeed happen by increasing additional ring mass. The TL and frequency bandwidth can be tuned by changing the location, adding numbers and varying mass distribution of the ring masses on the membrane.

Details

Multidiscipline Modeling in Materials and Structures, vol. 14 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 1 May 2010

Jing Xie, Mei Yang, Kelu Yan and Ping Yao

Nomex fabric is irradiated by an Xe2 * excimer UV lamp (172 nm). The influence of differentirradiating times and atmospheres (nitrogen and air) on the…

Abstract

Nomex fabric is irradiated by an Xe2 * excimer UV lamp (172 nm). The influence of different irradiating times and atmospheres (nitrogen and air) on the properties of Nomex fabric has been studied. The results show that the wettability of Nomex fabrics greatly improves when irradiated for 2 minutes. The scanning electron microscope (SEM) photos denote that the surface of the irradiated Nomex fiber is etched and the degree of etching in nitrogen is more severe than that in air. The XPS measurement proves that the surface of the Nomex fibers, which is irradiated in nitrogen and in air, generates carboxyl and hydroxyl groups. The results also show that the adhesive strength of the Nomex/polyethylene composite is reinforced by the irradiation.

Details

Research Journal of Textile and Apparel, vol. 14 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Article
Publication date: 2 November 2015

Xiao-Hua Yang, Chong-Li Di, Jun He, Jian Zhang and Yu-Qi Li

– The purpose of this paper is to assess the water resources vulnerability (WRV) rationally in Haihe River Basin (HRB) using set pair analysis (SPA) theory.

Abstract

Purpose

The purpose of this paper is to assess the water resources vulnerability (WRV) rationally in Haihe River Basin (HRB) using set pair analysis (SPA) theory.

Design/methodology/approach

An improved intelligent set pair analysis (IISPA) model is established, in which intelligent SPA theory is introduced and the weights are determined by use of the maximum entropy principle and the improved analytic hierarchy process method. The index systems and criteria of WRV assessment in terms of water cycle, socio-economy, and ecological environment are established based on the analysis of sensibility and adaptability.

Findings

The authors apply IISPA to the WRV assessment of seven administrative divisions in HRB. Results show IISPA can fully take advantage of certain and uncertain information compared with fuzzy assessment and topsis assessment models. For present situation, Shanxi, Shandong, Tianjing, Inner Mongolia, Hebei are higher, Henan and Beijing are the middle vulnerability. But Henan will become worse under climate change scenario II and IV.

Research limitations/implications

The analysis results may be affected by the limited climate change data.

Practical implications

It is helpful for further research to the complexity analysis of water resources system.

Social implications

This paper will have an important impact on water resources sustainable utilization.

Originality/value

This is the first time to utilize IISPA method to analyze the WRV of seven administrative divisions in HRB. This paper provides an important theoretical support for water resources management.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 25 no. 8
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 24 August 2010

Yi‐nan Guo, Mei Yang and Da‐wei Xiao

The purpose of this paper is to find a novel optimization selection method for hyper‐parameter of support vector classification (SVC), responsible for the classification…

Abstract

Purpose

The purpose of this paper is to find a novel optimization selection method for hyper‐parameter of support vector classification (SVC), responsible for the classification of datasets from the UCI machine learning database repository.

Design/methodology/approach

A novel two‐stage optimization selection method for hyper‐parameters is proposed. It makes use of explicit information derived from issues and implicit knowledge extracted from the evolution process so as to improve the performance of classifier. In the first stage, the search extent of each hyper‐parameter is determined according to the requirements of issues. In the second stage, optimal hyper‐parameters are obtained by adaptive chaotic culture algorithm in the above search extent. Adaptive chaotic cultural algorithm uses implicit knowledge extracted from the evolution process to control mutation scale of chaotic mutation operator. This algorithm can ensure the diversity of population and exploitation in the latter evolution.

Findings

The rationality of the above optimization selection method is proved by the binary classification problem. Final confirmation of this approach is the classification results compared with other methods.

Originality/value

This optimization selection method can effectively avoid premature convergence and lead to better computation stability and precision. It is not related on the structure of functions. SVC model corresponding to optimal hyper‐parameters by this method has better generalization.

Details

International Journal of Intelligent Computing and Cybernetics, vol. 3 no. 3
Type: Research Article
ISSN: 1756-378X

Keywords

Article
Publication date: 2 November 2015

Peiwu Dong, Kai Qiao and Mei Yang

The purpose of this paper is to study the operational efficiency of aerospace industry in China and compare the difference in efficiency between the private aerospace…

Abstract

Purpose

The purpose of this paper is to study the operational efficiency of aerospace industry in China and compare the difference in efficiency between the private aerospace enterprises and the state-owned aerospace enterprises. This paper enriches the study on evaluating the operational efficiency of aerospace industry and develops the theory on aerospace industry management.

Design/methodology/approach

The sample comprises all the aerospace enterprises listed in the A share market for which financial data are collected from the RESSET for subsequent analysis. Data envelopment analysis (DEA) and Malmquist productivity index (MPI) are used to derive findings.

Findings

The paper finds both the scale and the technical level of the industry increased during the period, and this was mainly due to the growth of the state-owned enterprises. However, with the increase of scale, the total factor productivity of the sample decreased. This was mainly because the performance of the leading enterprises regressed. Overall, the operational efficiency of the industry was still relatively low. By comparing the private enterprises and the state-owned enterprises, this paper finds, in terms of scale, the private enterprises were far lower than the state-owned enterprises. However, as for operational efficiency, the private was more efficient, which indicates an imbalance in the development of the industry.

Originality/value

This paper explores the operational efficiency across the Chinese aerospace industry, a focus currently lacking in research, presenting an overview of the industry and examining the difference in efficiency between the private aerospace enterprises and the state-owned aerospace enterprises to provide policymakers and managers with some practical suggestions to promote the development of the industry.

Details

Chinese Management Studies, vol. 9 no. 4
Type: Research Article
ISSN: 1750-614X

Keywords

Article
Publication date: 1 May 2006

Lucía Melián‐Alzola and Víctor Padrón‐Robaina

The purpose of this paper is to analyze the role and importance of the tangible elements of purchase processes in business to customer (b2c) electronic commerce, as well…

2546

Abstract

Purpose

The purpose of this paper is to analyze the role and importance of the tangible elements of purchase processes in business to customer (b2c) electronic commerce, as well as the impact on overall perceived quality and the customers' attitudes.

Design/methodology/approach

The database for this study was obtained from a sample of 191 individuals who had purchased on the internet. The techniques used in the statistical analysis of the data were the following: principal component, analysis structural equations and regression analyses.

Findings

The paper finds that four attributes – navigation, signposting, tools and explanation – explain the tangible dimension in electronic commerce. In the data resulting from the analyses, design is seen as an important factor of overall perceived quality and the willingness to recommend the purchase experience to others.

Research limitations/implications

If the company acts positively in the design, this will favorably affect overall perceived quality, but this is not enough to make a customer repeat. In future research, other dimensions which could retain the customers must be investigated.

Practical implications

The proposed scale to measure the dimension design could help firms to set an optimum design of their web sites, because a muddled and complex design represents a significant obstacle and may constitute a valid reason for a potential customer to decide not to return to the site.

Originality/value

Companies operating on the internet will find some suggestions in this paper on how to achieve competitive advantage through the optimum design of their web sites.

Details

Managing Service Quality: An International Journal, vol. 16 no. 3
Type: Research Article
ISSN: 0960-4529

Keywords

Article
Publication date: 7 October 2014

Greg G. Wang, David Lamond, Verner Worm, Wenshu Gao and Shengbin Yang

The purpose of this paper is to examine the indigenous Chinese concept of suzhi (素质) with the aim of furthering the development of Chinese human resource management (HRM…

Abstract

Purpose

The purpose of this paper is to examine the indigenous Chinese concept of suzhi (素质) with the aim of furthering the development of Chinese human resource management (HRM) research and practice.

Design/methodology/approach

An extensive review of the literature on suzhi, published in the West, as well as in China, is the basis for proffering an organizational-level conceptualization of suzhi in the Chinese context.

Findings

Instead of understanding it as a free-floating signifier, we argue that suzhi can be considered as a criterion-based framework for HRM research and practice. Suzhi research is classified into two major sources – indigenous Chinese and indigenized Western constructs. We further make a distinction between intrinsic and extrinsic suzhi, and analyze a popular set of suzhi criteria, considering de (morality) and cai (talent), while focusing on de in HRM selection (德才兼备, 以德为先). As multilevel and multidimensional framework, suzhi criteria may form different gestalts in different organizations and industries.

Research limitations/implications

From a social cultural and historical perspective, HRM research that incorporates a combination of indigenous and indigenized suzhi characteristics may receive better acceptance by individuals, organizations and the society in the Chinese context. Accordingly, the reconstruction of suzhi into manageable and measurable dimensions can be undertaken for more effective HRM practice in the Chinese context.

Originality/value

The HRM literature is advanced by linking the indigenous suzhi discourse to Chinese indigenous HRM research and practice.

Details

Journal of Chinese Human Resource Management, vol. 5 no. 2
Type: Research Article
ISSN: 2040-8005

Keywords

1 – 10 of 908