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1 – 10 of over 2000
Article
Publication date: 20 November 2023

Yingxiang Zhao, Junde Guo, Xiaoni Yan, Shan Du, Min Gong, Biao Sun, Junwen Shi and Wen Deng

The purpose of this paper is to investigate the friction and wear mechanisms in copper-based self-lubricating composites with MoS2 as the lubricating phase, which provides a…

Abstract

Purpose

The purpose of this paper is to investigate the friction and wear mechanisms in copper-based self-lubricating composites with MoS2 as the lubricating phase, which provides a theoretical basis for subsequent research on high-performance copper-based self-lubricating materials.

Design/methodology/approach

Friction tests were performed at a speed of 100 r/min, a load of 10 N, a friction radius of 5 mm and a sliding speed of 30 min. Friction experiments were carried out at RT-500°C. The phase composition of the samples was characterized by X-ray diffraction of Cu Ka radiation, and the microstructure, morphology and elemental distribution were characterized by scanning electron microscopy and energy dispersive spectroscopy. Reactants and valences formed during the wear process were analyzed by X-ray photoelectron spectroscopy.

Findings

The addition of MoS2 can effectively improve friction-reducing and anti-wear action of the matrix, which is beneficial to form a lubricating film on the sliding track. After analyzing different changing mechanism of the sliding tracks, the oxides and sulfides of MoS2, MoO2, Cu2O, CuO and Ni(OH)2 were detected to form a synergetic lubricating film on the sliding track, which is responsible for the excellent tribological properties from room to elevated temperature.

Research limitations/implications

For self-lubrication Cu–Sn–Ni–MoS2 material in engineering field, there are still few available references on high-temperature application.

Practical implications

This paper provides a theoretical basis for the following research on copper-based self-lubricating materials with high performance.

Originality/value

With this statement, the authors hereby certify that the manuscript is the results of their own effort and ability. They have indicated all quotes, citations and references. Furthermore, the authors have not submitted any essay, paper or thesis with similar content elsewhere. No conflict of interest exits in the submission of this manuscript.

Details

Industrial Lubrication and Tribology, vol. 76 no. 1
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 3 February 2020

Jin Guan, Min Gong and Bo Gao

A novel Ka-band compact parallel-coupled microstrip bandpass filter with harmonic suppression performance has been designed, implemented and tested on GaAs MMIC.

Abstract

Purpose

A novel Ka-band compact parallel-coupled microstrip bandpass filter with harmonic suppression performance has been designed, implemented and tested on GaAs MMIC.

Design/methodology/approach

This proposed filter consists of modified coupled-line units with T-shaped open-stubs.

Findings

The proposed filter with T-shaped open-stubs is valuable in performance with low loss at fundamental frequency, suppression at harmonic frequencies and small size. The simulation is based on full-wave electromagnetic analysis and the measurement is based on chip test. It shows an insertion loss below 1.2 dB, return loss better than 20 dB in the pass band and high than 28 dB suppression at harmonic frequencies.

Originality/value

This Ka-band MMIC filter with harmonic suppression is attractive for the millimeter-wave system.

Details

Circuit World, vol. 46 no. 3
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 20 September 2019

Jin Guan, Min Gong, Bo Gao, Yuxi Lu and Yu Lu

The purpose of this paper is to present a K-band modified hairpin bandpass filter on a planar circuit with harmonic suppression and compact size.

Abstract

Purpose

The purpose of this paper is to present a K-band modified hairpin bandpass filter on a planar circuit with harmonic suppression and compact size.

Design/methodology/approach

The inter-connect transmission lines of conventional hairpin filter are replayed by T-shaped open stub to achieve transmission zero for second harmonic. This filter is simulated and optimized by using electromagnetic simulation software and tested on-chip.

Findings

This proposed filter shows the return loss of better than −10dB, the insertion loss of better than 2 dB in pass-band and suppression of more than 40 dB at second harmonic.

Originality/value

The proposed filter can be designed on monolithic microwave integrated circuit, PCB or LTCC and it is useable for microwave and microwave and millimeter-wave systems.

Details

Circuit World, vol. 45 no. 4
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 1 August 2019

Min Li, Wenyuan Huang, Chunyang Zhang and Zhengxi Yang

The purpose of this paper is to draw on triadic reciprocal determinism and social exchange theory to examine how “induced-type” and “compulsory-type” union participation influence…

Abstract

Purpose

The purpose of this paper is to draw on triadic reciprocal determinism and social exchange theory to examine how “induced-type” and “compulsory-type” union participation influence union commitment and job involvement, and how union participation in the west differs from that in China. It also examines whether the role of both organizational justice and employee participation climate (EPC) functions in the Chinese context.

Design/methodology/approach

Cross-sectional data are collected from 694 employees in 46 non-publicly owned enterprises, both Chinese and foreign, in the Pearl River Delta region of China. A multi-level moderated mediation test is used to examine the model of this research.

Findings

Union participation is positively related to organizational justice, union commitment and job involvement. In addition, organizational justice acts as the mediator among union participation, union commitment and job involvement. Specifically, the mediating role of organizational justice between union participation and union commitment, and between union participation and job involvement, is stronger in high-EPC contexts than low-EPC contexts.

Originality/value

Instead of examining the impacts of attitudes on union participation, as per most studies in the western context, this research examines the impacts of union participation in the Chinese context on attitudes, including union commitment and job involvement. It also reveals the role of both organizational justice and EPC in the process through which union participation influences union commitment and job involvement.

Details

Employee Relations: The International Journal, vol. 41 no. 6
Type: Research Article
ISSN: 0142-5455

Keywords

Article
Publication date: 17 April 2009

Aihie Osarenkhoe

Is non‐sequential internationalization process solely technology enabled or a product of mutually interdependent forces? This paper aims to show that even though the sequential…

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Abstract

Purpose

Is non‐sequential internationalization process solely technology enabled or a product of mutually interdependent forces? This paper aims to show that even though the sequential approach in the process model is intuitively appealing, not all firms follow such a path. Hence, integrated framework to explain how the international market entry process has changed with respect to the sequential approach is presented.

Design/methodology/approach

The data banks of the Swedish Trade Council and the Chambers of Commerce are used to identify small and medium‐sized enterprises (SMEs) with between 50 and 250 employees (in compliance with European Union's definition of SMEs). Data are collected through the use of questionnaires and in‐depth interviews from 60 Swedish SMEs operating in other countries and foreign SMEs operating in Sweden that tends not to develop in incremental stages with respect to their international.

Findings

Some of the findings are: that the sequential model is by no means reflective of, or appropriate for all firms' approaches to international business; the usefulness gained by using an international network approach to study the international activity of a firm; and the interplay between the identified driving forces behind a non‐sequential internationalization process.

Research limitations/implications

Even though market entry patterns of firms investigated demonstrate a non‐sequential internationalization process, they are still within the general theoretical framework where the basic assumption of the sequential internationalization model can maintain its validity. Firms are indeed exposed to irrecoverable transaction costs that hamper their behaviours and complicate export supply responses in international markets. However, the magnitude of the costs and speed of internationalization is dependent on the ability of the firms to take advantage of the enablers of non‐sequential internationalization pattern. This is particularly important for firms to and from developing countries and emerging markets and their propensities to succeed in their internationalization endeavours.

Originality/value

Knowledge acquired from the empirical study of firms that tend not to develop in incremental stages with respect to their international activities, and therefore start international activities by entering very distant markets and multiple countries right from birth without prior experience, is used to develop an integrated framework which aptly depicts that non‐sequential internationalization process is not solely enabled by technology, as commonly envisaged in literature, but a product of mutually interdependent forces. Consequently, this study provides a holistic view on the driving forces behind the rapid internationalization process encountered by many SMEs today.

Details

Business Process Management Journal, vol. 15 no. 2
Type: Research Article
ISSN: 1463-7154

Keywords

Book part
Publication date: 16 September 2014

Mian Wang and Yajing Feng

Special education in China has lagged behind regular education for many years, however, the past few decades, the government has made considerable efforts to develop and improve…

Abstract

Special education in China has lagged behind regular education for many years, however, the past few decades, the government has made considerable efforts to develop and improve the special education system. While the citizens of China have had a generic moral interest in disability since ancient times, the development of special education schools did not occur until American and European missionaries started schools for the visually and hearing impaired in the 19th century. The next major influence in the development of the special education system occurred with China’s Cultural Revolution in 1978. Interestingly, there is not any exclusive legislation on special education but in the 1980s, the government started Learning in Regular Classrooms (LRC), which is China’s version of inclusion. LRC has progressed rapidly the past two decades; however, the quality of instruction is low due to a lack of specialists, a shortage of personnel, inadequate funding, and limited technology as well as other barriers that are delineated in the chapter. The chapter emphasizes the government’s recent efforts in in-service teacher training, the preparation of preservice teachers, working with families, developing community rehabilitation training programs, and implementing evidence-based practices. Special education in China today is at a good place but it has quite a way from the ideal situation.

Details

Special Education International Perspectives: Practices Across the Globe
Type: Book
ISBN: 978-1-78441-096-4

Article
Publication date: 1 January 2006

Xu Yan, Min Gong and James Y.L. Thong

The short message service (SMS) has been available in Hong Kong and China since the late 1990s. However, the user acceptance patterns for this service have been evidently

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Abstract

Purpose

The short message service (SMS) has been available in Hong Kong and China since the late 1990s. However, the user acceptance patterns for this service have been evidently different in these two regions. Based on fieldwork in Hong Kong and China, this study attempts to explain these differences.

Design/methodology/approach

The paper uses the information technology acceptance framework, which posits that various external factors impact on a person's perceived usefulness, perceived ease of use, and subjective norms, leading to user acceptance of the SMS.

Findings

This study contributes to telecommunications research by delineating the various stimuli to consider for successful technology acceptance in a global setting, which can account for differential impacts across regions. These stimuli include the economic development level, cultural differences, political censorship, business models, market competition, and input language.

Research limitations/implications

More rigorous statistical analysis will further enhance this paper.

Practical implications

The findings of this study can assist telecommunications operators in formulating an effective region‐specific strategy when launching a wireless data service in a particular environment.

Originality/value

This paper is of use in that it studies telecommunications issues with reference to the theories of information systems.

Details

info, vol. 8 no. 1
Type: Research Article
ISSN: 1463-6697

Keywords

Book part
Publication date: 18 July 2018

Mengwei Tu

Abstract

Details

Education, Migration and Family Relations between China and the UK: The Transnational One-Child Generation
Type: Book
ISBN: 978-1-78714-673-0

Book part
Publication date: 21 November 2022

Ssu-Han Yu and Miaoju Jian

The authors focus on a non-Western setting that has hardly featured in debates around political authenticity, Taiwan. The authors also adopt a novel inter-generational perspective…

Abstract

The authors focus on a non-Western setting that has hardly featured in debates around political authenticity, Taiwan. The authors also adopt a novel inter-generational perspective to look at varying attitudes towards two ‘unconventional’, high-profile politicians, Ko Wen-je and Han Kuo-yu. Drawing on focus group data, the authors note the similarities and differences in the way that the different generations engage with, and assess, the two politicians with a particular focus on the extent to which their personalities, appearance, and everyday activities are perceived as authentic.

Details

Cultures of Authenticity
Type: Book
ISBN: 978-1-80117-937-9

Keywords

Content available
Article
Publication date: 1 August 2000

226

Abstract

Details

Disaster Prevention and Management: An International Journal, vol. 9 no. 3
Type: Research Article
ISSN: 0965-3562

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