Xuepeng Zhan, Jianjun Wu, Mingzhi Wang, Yu Hui, Hongfei Wu, Qi Shang and Ruichao Guo
This paper aims to first apply more advanced anisotropic yield criterions as Yld91 and Yld2004 to spherical indentation simulations, and investigate plastic anisotropy identified…
Abstract
Purpose
This paper aims to first apply more advanced anisotropic yield criterions as Yld91 and Yld2004 to spherical indentation simulations, and investigate plastic anisotropy identified from indentation simulations following different yield criterions (Hill48, Yld91, Yld2004) to discover laws. It also aims to compare the difference in plastic anisotropy identified from indentation on three yield criterions and evaluate the applicability of plastic anisotropy.
Design/methodology/approach
This paper uses indentation simulations on different yield criterions to identify plastic anisotropy. First, the trust-region techniques based on the nonlinear least-squares method are used to determine anisotropy coefficients of Yld91 and Yld2004. Then, Yld91 and Yld2004 are implemented into ABAQUS software using user-defined material (UMAT) subroutines with the proposed universal structure. Finally, through considering comprehensively the key factors, the locations of the optimal data acquisition points in indentation simulations on different yield criterions are determined. And, the identified stress–strain curves are compared with experimental data.
Findings
This paper discovers that indentation on Yld2004 is able to fully identify difference in equivalent plastic strain between 0° and 90° directions when indentation depth ht is relatively smaller. And, this research demonstrates conclusively that plastic anisotropy identified from indentation on Yld2004 and Yld91 is more applicable at larger strains than that on Hill48, and that on Yld2004 is more applicable than that on Yld91, overall. In addition, the method on the determination of the locations of the optimal data acquisition points is demonstrated to be also valid for anisotropic material.
Originality/value
This paper first investigates plastic anisotropic properties and laws identified from indentation simulations following more advanced anisotropic yield criterions and provides reference for later research.
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Jialiang Xie, Shanli Zhang, Honghui Wang and Mingzhi Chen
With the rapid development of Internet technology, cybersecurity threats such as security loopholes, data leaks, network fraud, and ransomware have become increasingly prominent…
Abstract
Purpose
With the rapid development of Internet technology, cybersecurity threats such as security loopholes, data leaks, network fraud, and ransomware have become increasingly prominent, and organized and purposeful cyberattacks have increased, posing more challenges to cybersecurity protection. Therefore, reliable network risk assessment methods and effective network security protection schemes are urgently needed.
Design/methodology/approach
Based on the dynamic behavior patterns of attackers and defenders, a Bayesian network attack graph is constructed, and a multitarget risk dynamic assessment model is proposed based on network availability, network utilization impact and vulnerability attack possibility. Then, the self-organizing multiobjective evolutionary algorithm based on grey wolf optimization is proposed. And the authors use this algorithm to solve the multiobjective risk assessment model, and a variety of different attack strategies are obtained.
Findings
The experimental results demonstrate that the method yields 29 distinct attack strategies, and then attacker's preferences can be obtained according to these attack strategies. Furthermore, the method efficiently addresses the security assessment problem involving multiple decision variables, thereby providing constructive guidance for the construction of security network, security reinforcement and active defense.
Originality/value
A method for network risk assessment methods is given. And this study proposed a multiobjective risk dynamic assessment model based on network availability, network utilization impact and the possibility of vulnerability attacks. The example demonstrates the effectiveness of the method in addressing network security risks.
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Mingzhi Hu, Lina Wu, Guocheng Xiang and Shihu Zhong
Using data from the China Health and Nutrition Survey, this work examines the relationship between housing price and the probability of marriage among the young.
Abstract
Purpose
Using data from the China Health and Nutrition Survey, this work examines the relationship between housing price and the probability of marriage among the young.
Design/methodology/approach
By exploiting land reform as an exogenous change in housing price and employing a differences-in-differences framework, this study investigates the effects of housing price on the marriage probability of young people.
Findings
This work confirms that land reform decreased young people's likelihood of marriage. This finding is robust to a series of model specifications. The effects of land reform increased over time because of rising housing unaffordability from progressively inflating housing prices. Moreover, land reform had larger effects on renters and young adults aged below 30 than homeowners and young adults aged above 30.
Social implications
Overall, this study highlights the negative consequences of an overheated housing market on marriage in developing countries.
Originality/value
Housing prices have increased dramatically in urban China after 2002 upon the implementation of the assignment system of the use right of all kinds of profit-oriented lands by means of public bidding, auction and quotation. High housing prices indicate serious housing unaffordability, especially for young people who typically have low income and wealth. Homeownership that comes with various benefits can theoretically increase the likelihood of marriage, particularly in China where a house is often regarded as a prerequisite for marriage.
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Mingzhi Hu, Yinxin Su and Xiaofen Yu
This study investigates the potential association between corporate digitization and disclosure quality, and how this relationship is moderated by non-state ownership and…
Abstract
Purpose
This study investigates the potential association between corporate digitization and disclosure quality, and how this relationship is moderated by non-state ownership and institutional environment.
Design/methodology/approach
Drawing on signaling theory and factors that affect disclosure quality, the authors developed a framework to study how corporate digitization is associated with disclosure quality. The proposed framework was empirically tested using a comprehensive analysis that integrated corporate-level data on digitalization, disclosure quality, and ownership structure, with regional-level data on the institutional environment. The authors employed linear panel regression models with fixed effects.
Findings
The authors found that corporate digitization is significantly and positively associated with higher disclosure quality. This positive association is particularly pronounced for non-state-owned enterprises compared to state-owned enterprises. Additionally, an improvement in the institutional environment strengthens the positive relationship between digitization and disclosure quality.
Originality/value
This work contributes to the literature on corporate digitization by empirically investigating its impact on disclosure quality. The study also extends previous research by considering the moderating roles of ownership structure and institutional environment on the digitization-disclosure quality relationship.
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Mingzhi Huang, Christopher Richardson and Noor Fareen Abdul Rahim
China is playing an increasingly prominent role in global business. However, there has been relatively little research on Chinese inpatriates working in Western countries…
Abstract
Purpose
China is playing an increasingly prominent role in global business. However, there has been relatively little research on Chinese inpatriates working in Western countries, particularly in non-Anglo cultural contexts. This study attempts to explore the process of cross-cultural adjustment (CCA) and integration into corporate headquarters of Chinese inpatriates working in France, including the favorable factors that accelerate this process.
Design/methodology/approach
Based on a qualitative, single-case study of Group X, a pseudonym for a French multinational enterprise, the authors drew on semi-structured interviews with 18 Chinese inpatriates and investigated their CCA and integration process at the French headquarters of their employer.
Findings
The CCA and integration process of Chinese inpatriates at the French headquarters includes three stages: honeymoon and/or crisis period, adjustment and/or integration period and mutual growth period. Chinese inpatriates mainly face language barriers and Sino-French cross-cultural challenges. They overcome these challenges by learning the language and culture of the host country and using co-cultural and cross-cultural Guanxi. Experiences vary, with some Chinese inpatriates bypassing the honeymoon and/or crisis stage and entering directly into the adjustment and/or integration stage and some even leapfrogging both initial phases to attain a stage of mutual growth. Favorable factors for this CCA and integration acceleration include experience of living abroad, the host country language proficiency, organizational service support and the English working environment.
Originality/value
The study enhances the theoretical framework of Chinese expatriates’ psychological adjustment process through two key contributions. First, it enriches the three stages by incorporating new aspects, namely the honeymoon facet at the crisis stage, the integration into the headquarters facet at the self-adjust stage and the promoting organizational growth facet at self-growth stage. Second, it adds precision to the horizontal timeline by incorporating two additional initial points for the adjustment and integration process. Until now, Chinese inpatriates and the French context have received little attention, and this research takes a step forward by illuminating the CCA and integration process of Chinese inpatriates in this non-Anglophone country.
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This study aims to apply deep convolutional neural network Mask-R-CNN algorithm based on transfer learning to realize the segmentation of online wear fragments.
Abstract
Purpose
This study aims to apply deep convolutional neural network Mask-R-CNN algorithm based on transfer learning to realize the segmentation of online wear fragments.
Design/methodology/approach
Wear debris analysis is considered to be one of the most effective methods to maintain the condition of mechanical equipment. In this paper, the friction and wear testing machine was used to design pin-disk rotation, pin-disk reciprocation and four-ball test to produce cutting, sliding, laminar and fatigue debris. A semi-online sampling system was designed to collect ferrographic images containing various fragments. The images were rotated and flipped to augment the data and enhance the generalization ability of the model. The data set required for data analysis is established. Using COCO pre-trained Mask R-CNN data set as a benchmark, the region proposal network (RPN) is trained with labeled wear debris images to enhance the ability of RPN to recognize background and wear debris. Two transfer learning scenarios are tested in the network head of the Mask R-CNN.
Findings
The results show that the deep convolutional neural network is suitable for the automatic classification and detection of wear fragments. Through transfer learning and proper training configuration, the ferrographic image recognition based on Mask R-CNN achieves high accuracy.
Originality/value
The results show that the deep convolutional neural network is suitable for the automatic classification and detection of wear fragments. Through transfer learning and proper training configuration, the ferrographic image recognition based on Mask R-CNN achieves high accuracy.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2024-0182/
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Li Huang, Qingyan Zheng, Xin Yin, Mingzhi Luo and Yang Yang
Some researchers have found that disasters may have a “blessing in disguise effect” that some disaster sites transformed into more popular tourism destinations; however, no…
Abstract
Purpose
Some researchers have found that disasters may have a “blessing in disguise effect” that some disaster sites transformed into more popular tourism destinations; however, no studies have analyzed the heterogeneity of the “blessing in disguise effect”. This paper aims to explore and determine the effect of cultural distance on international inbound tourist arrivals to a post-disaster tourist destination that could explain this heterogeneous phenomenon.
Design/methodology/approach
This study used a threshold regression model and a differences-in-differences (DID) approach to analyze 2000–2016 international tourist arrival data from 13 main origin countries to Sichuan Province before and after the 2008 Wenchuan Earthquake in China.
Findings
The effect of cultural distance on post-disaster inbound arrivals from the various origin countries followed a non-linear U-shaped “double-edged sword” pattern rather than displaying a simple linear relationship. Most notably, the disaster appeared to have a more positive effect on arrivals from countries with larger cultural distances, while the effect on arrivals from countries with shorter cultural distances was negative.
Originality/value
This study found that cultural distance could explain the heterogeneous “blessing in disguise” phenomenon, and it had both positive and negative impacts on tourism destination recovery; that is, a definite “double-edged sword effect” of cultural distance was found, which could help destination marketing organizations and management departments to design appropriately targeted marketing for post-disaster tourism destination recovery.
研究目的
些研究人员发现, 灾难可能会产生“因祸得福效应”, 即一些灾难现场变成了更受欢迎的旅游目的地。然而, 目前还没有研究分析这种“因祸得福效应”的异质性。本研究旨在探讨文化距离对灾后旅游目的地的国际入境旅游流的影响, 从而解释这种异质性现象。
研究设计/方法
本文采用门槛回归模型和双重差分法(DID)分析了2008年汶川地震发生前后(2000–2016年)来自13个主要来源国到中国四川省旅游的国际入境旅游流数据。
结果
文化距离对灾后客源国的入境旅游人数的影响呈现非线性的U型“双刃剑”模式, 而不是简单的线性关系。最值得注意的是, 灾难似乎对来自文化距离较大的客源国的游客人数产生了更积极的影响, 而对来自文化距离较短的客源国的游客人数产生了消极的影响。
原创性/价值
本研究发现, 文化距离可以解释异质性的“因祸得福”现象, 文化距离对旅游目的地恢复既有积极影响, 也有消极影响, 即文化距离具有明确的“双刃剑效应”。这可以帮助旅游目的地的灾后恢复设计合理的、有针对性的营销策略和恢复政策。
Propósito
Algunos investigadores han encontrado que los desastres pueden tener la “bendición del efecto disfraz” de que algunos sitios de desastre se transformen en destinos turísticos más populares;Sin embargo, ningún estudio ha analizado la heterogeneidel “efecto de bendición disfrazado”.El objetivo de este estudio es explorar y determinar el efecto de la distancia cultural en los flujos turísticos internacionales hacia un destino turístico después del desastre, lo que podría explicar este fenómeno heterogéneo.
Diseño/metodología/enfoque
se empleun modelo de regresión de umbral y un enfoque de diferencias en diferencias (DID) para analizar los datos de llegada de turistas internacionales de 2000–2016 de trece países de origen principal A la provincia de Sichuan antes y después del terremoto de Wenchuan de 2008 en China.
Conclusiones
el efecto de la distancia cultural en las llegde los diversos países de origen después del desastre siguió un patrón de “espada de doble filo” no lineal en forma de u, en lugar de mostrar una relación lineal simple.Más notablemente, el desastre pareció tener un efecto más positivo en las llegde países con distancias culturales más grandes, mientras que el efecto en las llegde países con distancias culturales más cortas fue negativo.
Originalidad/valor
este estudio encontró que la distancia cultural podría explicar el heterogéneo fenómeno de la “bendición disfrazada” y que tenía impactos tanto positivos como negativos en la recuperación de un destino turístico;Es decir, se encontró un “efecto de doble filo” de la distancia cultural, que podría ayudar a las organizaciones de comercialización de destinos turísticos y a los departamentos de administración a diseñar estrategias de comercialización dirigidas adecuadamente para la recuperación de destinos turísticos después del desastre.
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Mingzhi Hu, Jiaqi Liu and Xue Wang
Individuals who spend a large percentage of their incomes on consumption are perceived to prefer risks. Since entrepreneurs are well recognized as risk-takers, this chapter…
Abstract
Individuals who spend a large percentage of their incomes on consumption are perceived to prefer risks. Since entrepreneurs are well recognized as risk-takers, this chapter investigates whether consumption propensity is associated with entrepreneurship. Using micro-level data from Chinese Household Income Project, we find that households with a higher income–consumption ratio on average have a higher preference for risk-seeking, while they have a lower probability to be entrepreneurs. However, households who have higher consumption–income ratio and are in the top 10% of the wealth distribution are more likely to embark on entrepreneurship. In addition, we find that in-system connection (relationship with government-related units) decreases the likelihood of starting new business, while out-system connection (relationship with market units) increases it. These findings suggest that in an imperfect financial market, start-up finance and connections play important roles for entrepreneurship.
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Sha Zhong, Mingzhi Yang, Bosen Qian, Lei Zhang, Dongqing He, Tongtong Lin and Fue-Sang Lien
This study aims to provide new insights into aerodynamic drag reduction for increasingly faster blunt-nosed trains, such as urban and freight trains. Specifically, this work…
Abstract
Purpose
This study aims to provide new insights into aerodynamic drag reduction for increasingly faster blunt-nosed trains, such as urban and freight trains. Specifically, this work investigates two distinctly different wake structures and associated aerodynamic drag of blunt-nosed trains.
Design/methodology/approach
Three typical cases of blunt-nosed trains with 1-, 2- and 3-m nose lengths are selected. The time-averaged and unsteady flow structures around the trains are analyzed using the improved delayed detached eddy simulation model and proper orthogonal decomposition method.
Findings
The simulation results indicate that for 2- and 3-m nose lengths, the flow separates at first and then reattaches to the slanted surface of the tail, with a pair of longitudinal vortices dominating the wake. In contrast, for the 1-m nose length case, the wake structure is characterized by complete separation, attributed to the larger curvature of the slanted tail surface. Consequently, the total time-averaged drag coefficient is reduced by 27.2% and 19.2% for the 1-m nose length case compared to the 2- and 3-m cases, respectively. Moreover, the predominant unsteady structures with Strouhal numbers St = 0.30 and St = 0.28 are detected in the near-wake of the 2- and 3-m nose length cases, respectively. These structures result from periodic vortex shedding at the lower slanted tail surface. In contrast, for the 1-m nose length case, the predominant unsteady structure with St = 0.19 is induced by the nearly periodic expansion and contraction of the upper bubbles.
Originality/value
Two distinctly different wake structures in blunt-nosed trains are identified. Unlike high-speed trains with longer, streamlined noses, for blunt-nosed trains, shorter nose lengths result in lower aerodynamic drag. Insights for reducing energy consumption in blunt-nosed trains are provided.
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This paper aims to identify the sources of innovation in the current business environment of China. With the set target of transforming China into an innovative society by 2020…
Abstract
Purpose
This paper aims to identify the sources of innovation in the current business environment of China. With the set target of transforming China into an innovative society by 2020, the Chinese government has taken dramatic measures to foster the nation’s innovation capability. Whether this Chinese model of promoting innovation has been successful and can be sustainable are controversial issues which need to be analyzed from an academic perspective. In recent years, there have been successful cases of innovation driven by grassroots entrepreneurs, especially in the information and communications technology (ICT) industry. Therefore, it is time to analyze their success factors from the perspectives of both corporate strategy and government policy.
Design/methodology/approach
The methodology used in this research is a comparative case analysis, and several high-profile cases in China’s ICT industry have been selected for this comparative study. Information used in the analysis comes from publicly available sources such as business school case studies and industry and news media reports. The authors have been following the evolution of China’s ICT industry for more than a decade; insights from their prior research and knowledge gained through industry contacts are also used in the analysis.
Findings
Generally speaking, the types of innovation in China’s ICT industry can be categorized into a top-down or a bottom-up approach. For the top-down approach of innovation driven by the government, the authors analyzed the case of the Chinese government’s effort to build an industry value chain through fostering the Chinese indigenous third-generation mobile communications standard time division–synchronous code division multiple access. In comparison, the authors use several success cases, including the ecosystem built around the highly successful XiaoMi mobile phone and Tencent’s mobile portal WeChat, as it showcases of the bottom-up approach of innovation driven by grassroots entrepreneurship. The comparison of these two approaches suggests that massive government-sponsored projects are unlikely to generate genuine innovation in the highly competitive and dynamic ICT sector. The government’s role should be to foster entrepreneurship and to create a fair business environment.
Originality/value
This research uses the method of comparative case studies to identify the source of innovation in a highly dynamic and uncertain business environment. Findings of this study shed light on the government policy toward innovation in the ICT industry and on the business firms’ strategy on innovation.