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Article
Publication date: 12 September 2023

Zhili Zhao, Mingqiang Zhang, Xi Meng, Zhenkun Li, Jiazhe Li, Luying Qiu and Zeyu Ren

The author proposed a friction plunge micro-welding (FPMW) method and applied it to column grid array packaging to realize the connection of copper columns without precision molds…

47

Abstract

Purpose

The author proposed a friction plunge micro-welding (FPMW) method and applied it to column grid array packaging to realize the connection of copper columns without precision molds assisted positioning. The purpose of this paper is to study the flow behavior of the solder undergoing frictional thermo-mechanical action during the FPMW and to determine the source of the solders in the micro-zones with different microstructure characteristics near the solder/Cu column friction interface.

Design/methodology/approach

Three kinds of Sn58Bi/SAC305 and SAC305/Pb90Sn composite solder samples were designed to study the flow behavior of the solder during FPMW using Bi and Pb as tracer elements.

Findings

The results show that most of the solders in the position occupied by the copper column was softened and plasticized during the welding process and was extruded to side of the copper column, flowing axially, circumferentially and radially along a trajectory similar to a conical spiral line. Under the drive of the tangential friction force and the radial hold-tight force, the extruded out visco-plastic solders fully mixed with the visco-plastic solders on the sides of the copper column, and bonded with the solders that deformed plastically on the periphery, so that a stir zone and a dynamic recrystallization zone finally evolved. The outside plastically deformed solders evolved into a thermo-mechanical affected zone.

Originality/value

The flow behavior of the solder during the FPMW was determined, as well as the source of the solders in micro-zones with different microstructure characteristics.

Details

Soldering & Surface Mount Technology, vol. 36 no. 1
Type: Research Article
ISSN: 0954-0911

Keywords

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Article
Publication date: 31 January 2024

Zhenkun Li, Zhili Zhao, Jinliang Liu and Xin Ding

To solve the problems caused by using precise molds for copper column positioning in the current column grid array package, this paper aims to optimize the proposed friction…

46

Abstract

Purpose

To solve the problems caused by using precise molds for copper column positioning in the current column grid array package, this paper aims to optimize the proposed friction plunge micro-welding (FPMW) technology without mold assistance, to overcome the problems of low interfacial bonding strength, shrinkage cavities and flash defects caused by the low hold-tight force of solder on the copper column.

Design/methodology/approach

A pressurizing device installed under the drill chuck of the friction welding machine is designed, which is used to apply a static constraint to the solder ball obliquely downward to increase the hold-tight force of the peripheral solder on the copper column during welding and promote the friction metallurgical connection between them.

Findings

The results show that the application of static constraint during welding can increase the compactness of the solder near the friction interface and effectively inhibit occurrences of flash, shrinkage cavities and crystal defects such as vacancies. Therefore, compared with the unconstrained (UC) FPMW, the average strength of the statically constrained (SC) FPMW joints and aged SC-FPMW joints can be increased by 51.1% and 122.6%, and the problem of the excessive growth of the interfacial connection layer in the UC-FPMW joints during aging can be effectively avoided.

Originality/value

The application of static constraint effectively inhibits the occurrence of defects such as shrinkage cavities, vacancies and flash in FPMW joints, and the welding quality is significantly improved.

Details

Soldering & Surface Mount Technology, vol. 36 no. 3
Type: Research Article
ISSN: 0954-0911

Keywords

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Book part
Publication date: 5 April 2012

Xueguang Zhou, Yun Ai and Hong Lian

Bureaucratic power – the power derived from the formal authority of the bureaucratic organization – has become a central organizing mechanism in modern societies. In this study…

Abstract

Bureaucratic power – the power derived from the formal authority of the bureaucratic organization – has become a central organizing mechanism in modern societies. In this study, we develop theoretical arguments to identify institutional sources as well as limitations of bureaucratic power. We argue that the very institutional sources of bureaucratic power also cultivate the countervailing forces that set limit to the exercise of bureaucratic power in formal organizations. These arguments and considerations are illustrated in two case studies of the “inspection and appraisal” processes in the Chinese bureaucracy. Our study raises issues about organizational isomorphism and calls for a closer look at the behavioral patterns in organizational processes.

Details

Rethinking Power in Organizations, Institutions, and Markets
Type: Book
ISBN: 978-1-78052-665-2

Keywords

Available. Open Access. Open Access
Book part
Publication date: 30 November 2023

Wen Wen and Simon Marginson

This paper focuses on governance in higher education in China. It sees that governance as distinctive on the world scale and the potential source of distinctiveness in other…

Abstract

This paper focuses on governance in higher education in China. It sees that governance as distinctive on the world scale and the potential source of distinctiveness in other domains of higher education. By taking an historical approach, reviewing relevant literature and drawing on empirical research on governance at one leading research university, the paper discusses system organisation, government–university relations and the role of the Communist Party (CCP), centralisation and devolution, institutional leadership, interior governance, academic freedom and responsibility, and the relevance of collegial norms. It concludes that the party-state and Chinese higher education will need to find a Way in governance that leads into a fuller space for plural knowledges, ideas and approaches. This would advance both indigenous and global knowledge, so helping global society to also find its Way.

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Article
Publication date: 2 May 2023

Yanping Zhao, Qizhen Liu and Yuanhe Yang

184

Abstract

Details

China Agricultural Economic Review, vol. 15 no. 2
Type: Research Article
ISSN: 1756-137X

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Article
Publication date: 17 February 2012

Xiangyang Li, Qinhe Gao, Zhili Zhang and Xianxiang Huang

The paper aims to provide an integrated system for collaborative maintenance training of complex equipment based on virtual maintenance and immersive virtual reality environment.

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Abstract

Purpose

The paper aims to provide an integrated system for collaborative maintenance training of complex equipment based on virtual maintenance and immersive virtual reality environment.

Design/methodology/approach

An integrated platform for collaborative virtual maintenance operation and training of complex equipment is developed. The simulation supporting platform for collaborative virtual maintenance is designed with the combined hierarchical structure and modularized members to support the interactive communication of heterogeneous data and information. By analyzing the collaboration mode of multi operators, the maintenance task allocation model, maintenance operation model and Extensible Markup Language‐based object information template are presented.

Findings

The research finds that the proposed system is an efficient platform for collaborative maintenance training of complex equipment.

Practical implications

Appropriate and efficient maintenance task allocation and collaborative maintenance operation of multi operators can significantly improve the maintenance efficiency of complex equipment.

Originality/value

A collaborative virtual maintenance training system of complex equipment based on immersive virtual reality environment is presented.

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Article
Publication date: 28 June 2013

Sheau‐yueh J. Chao

The purpose of this paper is to provide the historical background of genealogical records and analyze the value of Chinese genealogical research through the study of names and…

325

Abstract

Purpose

The purpose of this paper is to provide the historical background of genealogical records and analyze the value of Chinese genealogical research through the study of names and genealogical resources.

Design/methodology/approach

The paper examines the historical evolution and value of Chinese genealogical records, with the focus on researching the Islamic Chinese names used by the people living in Guilin. The highlight of this paper includes the analysis and evolution of the Islamic Chinese names commonly adopted by the local people in Guilin. It concludes with the recommendations on emphasizing and making the best use of genealogical records to enhance the research value of Chinese overseas studies.

Findings

The paper covers the history of Islam and describes how the religion was introduced into China, as well as Muslims' ethnicity and identity. It also places focus on the importance of building a research collection in Asian history and Chinese genealogy.

Research limitations/implications

This research study has a strong subject focus on Chinese genealogy, Asian history, and Islamic Chinese surnames. It is a narrow field that few researchers have delved into.

Practical implications

The results of this study will assist students, researchers, and the general public in tracing the origin of their surnames and developing their interest in the social and historical value of Chinese local history and genealogies.

Social implications

The study of Chinese surnames is, by itself, a particular field for researching the social and political implications of contemporary Chinese society during the time the family members lived.

Originality/value

Very little research has been done in the area of Chinese local history and genealogy. The paper would be of value to researchers such as historians, sociologists, ethnologists and archaeologists, as well as students and anyone interested in researching a surname origin, its history and evolution.

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Article
Publication date: 28 October 2022

Songsheng Chen, Michel Magnan, Zhili Tian and Li Yao

This paper aims to investigate the effect of prior years’ audit adjustments, a proxy for auditors’ private information regarding the persistence of their clients’ audit risk, on…

315

Abstract

Purpose

This paper aims to investigate the effect of prior years’ audit adjustments, a proxy for auditors’ private information regarding the persistence of their clients’ audit risk, on audit pricing in the current year.

Design/methodology/approach

The authors use unique data sets of audit adjustments and audit fieldwork days from China, and a regression approach, to test their hypothesis.

Findings

The authors find that larger previous audit adjustments are associated with higher current-year audit fees, which is partially attributed to increased audit effort. The authors further document that the results are more pronounced when audit adjustments are consistently made in the same direction or more recent; in these cases, a larger percentage of the total effect is also attributable to the risk premium, instead of audit effort. Finally, the authors find that the effect of previous audit adjustments on current-year audit fees is stronger for firms with younger chief executive officers and specialist auditors.

Originality/value

To the authors’ best knowledge, they are the first to test the implication of auditors’ private information in setting audit fees. In addition to demonstrating that audit fees consist of a risk premium and a component to cover related costs, the authors further show variations in the relative importance between costs and risk premium under various contexts.

Details

Managerial Auditing Journal, vol. 38 no. 3
Type: Research Article
ISSN: 0268-6902

Keywords

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Article
Publication date: 4 January 2013

Su‐Yan Pan

The purpose of this paper is to apply the theory of cultural diplomacy to explore and explain the role and function of the Confucius Institution project and its implications for…

6074

Abstract

Purpose

The purpose of this paper is to apply the theory of cultural diplomacy to explore and explain the role and function of the Confucius Institution project and its implications for understanding of China's soft power projection.

Design/methodology/approach

This paper first presents the theories of soft power and cultural diplomacy as an analytic framework. It then delineates an interpretative illustration of the CI project as a platform for China's cultural diplomacy. The paper concludes with a discussion of the CI project's implications for understanding of China's soft power projection.

Findings

The paper argues that the Confucius Institute project can be understood as a form of cultural diplomacy that is state‐sponsored and university‐piloted, a joint effort to gain China a more sympathetic global reception. As such, the Confucius Institution project involves a complex of soft power techniques. However, it is not entirely representative of soft power capability, because the problems embedded in the project and in the wider society run counter to the Chinese government's efforts to increase the Confucius Institutions’ attractiveness and popularity.

Originality/value

This article sheds light on Chinese universities in the role of “unofficial cultural diplomats.” On this topic, further research may need to explore more fundamental issues that bear far‐reaching significance and impact, i.e. the mechanics of Chinese university involvement in Confucius Institutes. Interesting questions arising from this study may help open up a wider spectrum of research topics for understanding the university‐state relationship, cross‐border higher education, as well as the possibilities and limits of educational globalization. At this stage, this article serves as a start to move scholarship in that direction.

Details

Asian Education and Development Studies, vol. 2 no. 1
Type: Research Article
ISSN: 2046-3162

Keywords

Available. Open Access. Open Access
Article
Publication date: 29 July 2020

Lin Gui, Zhendong Yin and Huihua Nie

The stability maintenance system has played an essential role in maintaining social stability although it also has brought about social problems worthy of attention. Admittedly…

4328

Abstract

Purpose

The stability maintenance system has played an essential role in maintaining social stability although it also has brought about social problems worthy of attention. Admittedly compensation-based stability maintenance policy can address the appeals of citizens whose rights are infringed and the dissolving effect in the provision of compensation can save the cost of stability maintenance but such stability maintenance system lacks equilibrium.

Design/methodology/approach

The establishment of a strict assessment system for stability maintenance performance can encourage the stability maintenance authorities to eliminate the “fuse effect” as much as possible and ensure the effective implementation of the stability maintenance system. However, the rigorous stability maintenance performance assessment also provides the possibility for profit-driven petitions.

Findings

Due to the continuous accumulation of social dissatisfaction and the lack of stability maintenance equilibrium in the implementation of the compensation-based stability maintenance policy, public governance will fall into a stability maintenance paradox of “greater instability resulting from stability maintenance”.

Originality/value

The provision of sufficient means for the people to protect their interest by implementing measures such as strengthening the rule of law mechanisms is the key to achieve long-term social stability.

Details

China Political Economy, vol. 3 no. 1
Type: Research Article
ISSN: 2516-1652

Keywords

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