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Article
Publication date: 29 November 2023

Mengxia Du, Qiao Wang, Yan Zhang, Yu Bai, Chunqiu Wei and Chunyan Liu

As to different angles of attack and nonlinear problems caused by high temperatures in coexisting hypersonic aircraft, people mainly rely on fluid software for research but lack…

Abstract

Purpose

As to different angles of attack and nonlinear problems caused by high temperatures in coexisting hypersonic aircraft, people mainly rely on fluid software for research but lack analysis of flow mechanisms. Owing to computational difficulties, few people use numerical algorithms to combine them for discussion. Hence, this study aims to make a deep inquiry into the laminar flow and heat transfer of compressible Newtonian fluid in hypersonic aircraft with small attack angles.

Design/methodology/approach

In this paper, on the basis of mass, momentum and energy conservation laws, the governing equations of the hypersonic boundary layer are established. Viscosity, specific heat capacity and thermal conductivity are considered nonlinear functions concerning temperature. In virtue of the MacCormack finite difference method, the stationary numerical solutions are solved directly, and the validity of the algorithm is verified.

Findings

The results demonstrate that at Mach number 5, compared to the 0° attack angle, the maximum temperature near-wall at the 3° attack angle increases by about 25%. An enjoyable phenomenon is discovered, where the position corresponding to the maximum wall shear force shifts back as the attack angle and Mach number increase. The relationship between the near-wall maximum temperature versus attack angle and Mach number is fitted through numerical calculation results.

Originality/value

Empirical formulas can be used to estimate heat transfer characteristics at small attack angles, which will guide the design of aircraft thermal protection systems.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 34 no. 3
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 27 May 2020

Yingwei Liu, Tao Wang, Ling Zhou and Chunyan Nie

The essence of “Chinese element” has been pinpointed as the representation of national cultural archetype resource of China, which reflects to the overall power enhancement of…

Abstract

Purpose

The essence of “Chinese element” has been pinpointed as the representation of national cultural archetype resource of China, which reflects to the overall power enhancement of China. Applying the Chinese national cultural archetype resource, which will be used for promoting the Chinese Brand internationalization, aims for the consumers' approval with the hope of integrating and spreading the unique cultural advantage of Chinese brand. The recognizing of Chinese brand's cultural archetype in this paper has constituted the basis of Chinese brand's cultural archetype strategy.

Design/methodology/approach

Based on the Grounded Theory, this paper has collected and analyzed the value symbols, character images and theme stories of Chinese narrative advertisements and constructed the cultural archetype framework of Chinese brands. This paper makes a comprehensive application of Charmaz's constructivist analysis and the main axis analysis and inspection method advocated by Strauss, with the aim of building a more objective and systematic theoretical framework for the Chinese brand cultural archetype.

Findings

In this framework, it revealed: (1) Chinese brand's cultural archetype can be divided into 12 concrete archetypes according to individual's relationship with self, the other, community and nature; (2) Consumers' different ways of self-categorization are attributed as the essential difference among various archetypes. This paper also compared and analyzed the differences between Chinese and Western cultural archetypes from three perspectives, formation of social structure, pedigree of myth and character's feature.

Originality/value

This paper has certain innovative significance to the theoretical construction of the archetype of Chinese brand culture. First, based on the cultural perspective, this paper applied the cultural psychological connotation of archetype to the brand research across culture, which is more conducive to the researchers' investigation of the cultural psychology of consumers in the cross-cultural context? Second, based on the identification and comparative study of Chinese brand culture archetype, it provides a new expansion and supplement for the research on brand internationalization and globalization in emerging countries.

Details

Journal of Contemporary Marketing Science, vol. 3 no. 1
Type: Research Article
ISSN: 2516-7480

Keywords

Article
Publication date: 8 May 2018

Zhiling Ma, Yajing Wen, Chunyan Zhang and Jing Wang

The purpose of this study is to evaluate the role of encapsulation pH and iron source on the anchorage mode and performance of iron oxide-encapsulated aluminium pigments.

Abstract

Purpose

The purpose of this study is to evaluate the role of encapsulation pH and iron source on the anchorage mode and performance of iron oxide-encapsulated aluminium pigments.

Design/methodology/approach

The coloured waterborne aluminium pigments were prepared at pH 5-7.5 by using FeSO4 and FeCl3 as iron source. The anchorage mode of iron oxides on aluminium was characterized using optical microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. Furthermore, the pigmentary performance was characterized through anticorrosion test and multi-angle spectroscopy.

Findings

Diaspore and boehmite could form from H2O2 oxidizing aluminium. Both low pH and FeSO4 systems are beneficial for diaspore, inducing green rust anchor on the aluminium to form goethite. Either in FeSO4 or FeCl3 system, slightly high pH is beneficial for the formation of boehmite, which occurred together with ferrihydrite to form denser coating with yellowness and excellent anticorrosion property. At pH above 7, the formation of dendritic iron oxide is detrimental to the anticorrosion property and the glossiness.

Research limitations/implications

Only FeSO4·7H2O and FeCl3·6H2O as iron sources were explored.

Practical implications

The investigation results provide theoretical basis to obtain excellent chromatic waterborne aluminium pigments.

Originality/value

The method for investigation of encapsulation mechanism by surveying the structure of iron oxides on aluminium, which varies with the pH of the system and iron sources, is novel.

Details

Pigment & Resin Technology, vol. 47 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 6 August 2020

Chunyan Zeng, Dongliang Zhu, Zhifeng Wang, Zhenghui Wang, Nan Zhao and Lu He

Most source recording device identification models for Web media forensics are based on a single feature to complete the identification task and often have the disadvantages of…

Abstract

Purpose

Most source recording device identification models for Web media forensics are based on a single feature to complete the identification task and often have the disadvantages of long time and poor accuracy. The purpose of this paper is to propose a new method for end-to-end network source identification of multi-feature fusion devices.

Design/methodology/approach

This paper proposes an efficient multi-feature fusion source recording device identification method based on end-to-end and attention mechanism, so as to achieve efficient and convenient identification of recording devices of Web media forensics.

Findings

The authors conducted sufficient experiments to prove the effectiveness of the models that they have proposed. The experiments show that the end-to-end system is improved by 7.1% compared to the baseline i-vector system, compared to the authors’ previous system, the accuracy is improved by 0.4%, and the training time is reduced by 50%.

Research limitations/implications

With the development of Web media forensics and internet technology, the use of Web media as evidence is increasing. Among them, it is particularly important to study the authenticity and accuracy of Web media audio.

Originality/value

This paper aims to promote the development of source recording device identification and provide effective technology for Web media forensics and judicial record evidence that need to apply device source identification technology.

Details

International Journal of Web Information Systems, vol. 16 no. 4
Type: Research Article
ISSN: 1744-0084

Keywords

Article
Publication date: 8 February 2021

Zhifeng Wang, Chi Zuo and Chunyan Zeng

Recently, the double joint photographic experts group (JPEG) compression detection tasks have been paid much more attention in the field of Web image forensics. Although there are…

Abstract

Purpose

Recently, the double joint photographic experts group (JPEG) compression detection tasks have been paid much more attention in the field of Web image forensics. Although there are several useful methods proposed for double JPEG compression detection when the quantization matrices are different in the primary and secondary compression processes, it is still a difficult problem when the quantization matrices are the same. Moreover, those methods for the different or the same quantization matrices are implemented in independent ways. The paper aims to build a new unified framework for detecting the doubly JPEG compression.

Design/methodology/approach

First, the Y channel of JPEG images is cut into 8 × 8 nonoverlapping blocks, and two groups of features that characterize the artifacts caused by doubly JPEG compression with the same and the different quantization matrices are extracted on those blocks. Then, the Riemannian manifold learning is applied for dimensionality reduction while preserving the local intrinsic structure of the features. Finally, a deep stack autoencoder network with seven layers is designed to detect the doubly JPEG compression.

Findings

Experimental results with different quality factors have shown that the proposed approach performs much better than the state-of-the-art approaches.

Practical implications

To verify the integrity and authenticity of Web images, the research of double JPEG compression detection is increasingly paid more attentions.

Originality/value

This paper aims to propose a unified framework to detect the double JPEG compression in the scenario whether the quantization matrix is different or not, which means this approach can be applied in more practical Web forensics tasks.

Details

International Journal of Web Information Systems, vol. 17 no. 2
Type: Research Article
ISSN: 1744-0084

Keywords

Article
Publication date: 20 February 2017

Xunan Feng, Jin Xu, Ying Wang and Chunyan Tang

Using the sample between 2005 and 2011, the purpose of this paper is to investigate the effect of a new fund entry on incumbents using the overlap measure in portfolio holdings.

Abstract

Purpose

Using the sample between 2005 and 2011, the purpose of this paper is to investigate the effect of a new fund entry on incumbents using the overlap measure in portfolio holdings.

Design/methodology/approach

Empirical methodology is used in this study.

Findings

The authors find that incumbents that have a higher overlap with the entrants underperform subsequently. Based on the characteristic-based approach of Daniel et al. (1997), the authors find that the characteristic selectivity component is negatively correlated with the overlap measure, and thereby the decline in performance is driven by the stock-picking ability. The authors also discuss the unobserved actions of incumbents using the approach proposed by Kacperczyk et al. (2008) and find that incumbent unobserved actions do not benefit mutual fund investors in China. Finally the authors find that investors respond to the supply-side competition between entrants and incumbents quickly. These findings help us understand the mutual fund completion in China.

Originality/value

The findings in this study can help scholars, industry experts and regulatory authorities to understand the effect of competition in Chinese mutual fund industry.

Details

China Finance Review International, vol. 7 no. 1
Type: Research Article
ISSN: 2044-1398

Keywords

Article
Publication date: 27 July 2011

Katarzyna Kosmala and Chunyan Xian

This study aims to examine aspects of the construction of professional identity, based on an interpretative inquiry in two Chinese professional service firms in Beijing.

1209

Abstract

Purpose

This study aims to examine aspects of the construction of professional identity, based on an interpretative inquiry in two Chinese professional service firms in Beijing.

Design/methodology/approach

Data were gathered through participant observation, archival material and interviews. The interpretive nature of the research experience facilitated openness to the local field and avoidance of a heavy reliance on assumptions that derive from privileging the Western constructions of professional identity, where “I” (the researcher) am situated epistemologically.

Findings

Professionalism discourse, a powerful resource of ambiguity, becomes an arena where identity is “asserted” through organisational performance, incorporated in normative Western‐driven laws. Enacted professionalism appears consistent with the pursuit of an elevated Western image. The relationships with the clients, however, are embedded in guanxi dynamics and related accountabilities, reflecting the local ways of doing things.

Originality/value

Empirical material offers insights into professionalisation processes in Chinese firms, with a focus on the construction of professional identity, located within organisational micro‐dynamics.

Details

Critical perspectives on international business, vol. 7 no. 3
Type: Research Article
ISSN: 1742-2043

Keywords

Article
Publication date: 18 February 2020

Thomas Burnham

Customer suggestions offer valuable insights to companies, and suggestion sharing is a form of engagement that strengthens customers’ relationships with firms. Yet research to…

Abstract

Purpose

Customer suggestions offer valuable insights to companies, and suggestion sharing is a form of engagement that strengthens customers’ relationships with firms. Yet research to date has neglected to explicitly study the antecedents of direct-to-firm consumer suggestion sharing or to adequately characterize the behavior. This paper aims to address this deficiency.

Design/methodology/approach

The research draws on two surveys using three different elicitation techniques – critical incident, direct reporting and scenario response. Inductive content analysis of consumer responses is used to derive exploratory insights regarding the range of factors that motivate and inhibit consumer suggestion sharing, with an emphasis on consumer service-related contexts.

Findings

Potential self, other and firm benefits motivate suggestion sharing, whereas a host of factors, including the effort involved, a lack of perceived firm efficacy and unpleasant sharing contexts inhibit it. The findings reveal a rich portrait of antecedents that illustrates how direct-to-firm suggestion-sharing behavior combines elements of customer citizenship behavior, customer complaint behavior and online community idea sharing.

Research limitations/implications

The research relies upon reporting by US students and consumers.

Practical implications

Service firms hoping to avail themselves of customers’ desire to contribute to their and their customers’ betterment must understand and manage the tripartite nature of consumer suggestion sharing evinced by the antecedents revealed.

Originality/value

To the best of the author’s knowledge, this research offers the first description of the range of factors that motivate and inhibit direct-to-firm consumer suggestion sharing. As such, it provides a theoretical foundation upon which future consumer suggestion-sharing research can build.

Article
Publication date: 8 February 2018

Ziying Cao, Verl Anderson, Feng Xu and Cam Caldwell

The purpose of this paper is to examine the values of Chinese university students as future leaders and employees in a global economy. Despite the fact that China’s role in the…

Abstract

Purpose

The purpose of this paper is to examine the values of Chinese university students as future leaders and employees in a global economy. Despite the fact that China’s role in the world economy has become increasingly important, little has been done to examine the nature of tomorrow’s Chinese business leaders.

Design/methodology/approach

A values survey was administered to business major students at a Tier 1 Chinese university and data were collected from 984 respondents to test five hypotheses relevant to values for Chinese youths.

Findings

This study suggests that today’s Chinese business students view traditional Chinese values through a lens influenced by western cultural and economic thinking as well as positive and negative impacts from rapid economic development.

Research limitations/implications

This paper is an empirical study based on a survey being administered to Chinese university students in two major cities in China. A limitation would be that all Chinese youth of the same age may not have the same values as this set of university students, or even those of Chinese students from a different region of China.

Originality/value

This paper is among the first to identify the current cultural values of the younger Chinese of university age population.

Details

International Journal of Public Leadership, vol. 14 no. 2
Type: Research Article
ISSN: 2056-4929

Keywords

Article
Publication date: 11 July 2016

Wenbin Sun and Joseph M. Price

This paper aims to examine the relationship between corporate social responsibility and customer satisfaction and evaluate the impact of this relationship on firm performance…

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Abstract

Purpose

This paper aims to examine the relationship between corporate social responsibility and customer satisfaction and evaluate the impact of this relationship on firm performance, specifically the moderating impact of environmental uncertainty on the corporate social responsibility to customer satisfaction relationship.

Design/methodology/approach

The authors constructed a panel data set by collecting data from Fortune Magazine’s World’s Most Admired Companies and Compustat. The authors used two methods, Newey–West and White–Cluster robust regressions, to estimate the empirical models.

Findings

The results from this moderating analysis of environmental uncertainty are largely consistent with this study's hypotheses. In particular, the authors find that corporate social responsibility contributes to increased customer satisfaction for large firms, in highly competitive environments and in highly dynamic industries. This paper also finds that in high growth environments, corporate social responsibility can result in decreased customer satisfaction.

Research limitations/implications

The study is limited to environmental factors in the examination boundary conditions. Researchers should broaden the moderators to include criteria such as market orientation, marketing and/or operations capability.

Practical implications

The empirical results provide practitioners with insight to better translate corporate social responsibility into higher levels of customer satisfaction.

Social implications

The empirical results support corporate social responsibility as a viable and productive means of increasing customer satisfaction.

Originality/value

This study is the first that builds upon the work of Luo and Bhattacharya (2006) and Saeidi et al. (2015) by examining environmental factors that influence the relationship between corporate social responsibility and customer satisfaction. This research provides useful implications for marketing theories as well as business practice.

Details

European Journal of Marketing, vol. 50 no. 7/8
Type: Research Article
ISSN: 0309-0566

Keywords

11 – 20 of 23