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Article
Publication date: 19 July 2021

Song Quan, Yong Guo, Xuedong Liu, Zhewu Chen and Yudi Liu

This paper aims to study the lubrication and sealing performance on the textured piston pair under the cross action of the shape and structure parameters. This paper…

Abstract

Purpose

This paper aims to study the lubrication and sealing performance on the textured piston pair under the cross action of the shape and structure parameters. This paper further carries out the optimization design of low energy consumption hydraulic impact piston pair.

Design/methodology/approach

Based on the characteristics of the ring gap seal piston pair, the flow field analysis model of the whole film gap is established for its periodic treatment. The friction power loss of the piston pair is defined as the evaluation index of the lubrication performance and the leakage power loss as the evaluation index of the sealing performance. The orthogonal test design and CFD software were used to analyze the lubrication and sealing performance of the textured piston pair.

Findings

The cross action of shape and structure factors has a great influence of the lubrication and sealing performance on the textured piston pair. Clearance and shape parameters have great influence on it, while seal length and depth diameter ratio have little influence. The sealing performance of conical textured piston pair is good, while the lubrication performance of square textured piston pair is good. The primary and secondary order of influence of shape and structure on energy consumption on piston pair is B (seal clearance) > C (texture shape) > D (area ratio) > A (seal length) > E (depth diameter ratio).

Originality/value

Breaking the defect of local optimization design on traditional piston pair structure, then find the matching relationship of structural parameters on textured piston pair. Further improve the lubrication and sealing performance of the piston pair, and provide reference for the global optimization design of the low energy consumption hydraulic impact piston pair.

Details

Industrial Lubrication and Tribology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 2 January 2018

Yong Guo, Shen-Min Song and Xue-Hui Li

This paper aims to investigate the problem of finite-time consensus tracking control without unwinding for formation flying spacecraft in the presence of external disturbances.

Abstract

Purpose

This paper aims to investigate the problem of finite-time consensus tracking control without unwinding for formation flying spacecraft in the presence of external disturbances.

Design/methodology/approach

Two distributed finite-time controllers are developed using the backstepping sliding mode. The first robust controller can compensate for external disturbances with known bounds, and the second one can compensate for external disturbances with unknown bounds.

Findings

Because the controllers are designed on the basis of rotation matrix, which represents the set of attitudes both globally and uniquely, the system can overcome the drawback of unwinding, which results in extra fuel consumption. Through introducing a novel virtual angular velocity, exchange of control signals between neighboring spacecraft becomes unnecessary, and it is able to reduce the communication burden.

Practical implications

The two robust controllers can deal with unwinding that may result in fuel consumption by traveling a long distance before returning to a desired attitude when the closed-loop system is close to the desired attitude equilibrium.

Originality/value

Two finite-time controllers without unwinding are proposed for formation flying spacecraft by using backstepping sliding mode. Furthermore, exchange of control signals between neighboring spacecraft is unnecessary.

Details

Aircraft Engineering and Aerospace Technology, vol. 90 no. 1
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 25 November 2019

Song Quan, Guo Yong, Gong Jun, Xuedong Liu, Jin Yongping and Yang Shuyi

This paper aims to study the frictional performance of reciprocating pair with high velocity by using hydrodynamic lubrication principle and fish scale textured piston model.

Abstract

Purpose

This paper aims to study the frictional performance of reciprocating pair with high velocity by using hydrodynamic lubrication principle and fish scale textured piston model.

Design/methodology/approach

Based on the idea of function characteristic approximation and coordinate change, a mathematical representation model of imitating fish scale texture pit section is established. According to the principle of dynamic pressure lubrication of the textured fluid, a three-dimensional numerical model of flow field for fish scale texture is established without considering cavitation. Numerical analysis of the model carp scale texture unit by orthogonal experimental design and FLUENT software is carried out.

Findings

Effects of fish scale pit texture on friction properties for a reciprocating pair piston surface with high velocity (impact piston) are acquired. Effects of texture characterization parameters and flow rate on the surface friction performance for impact piston are found. Effects of different characteristic parameters combination of imitating fish scale texture on friction performance for impact piston surface are obtained.

Originality/value

The model is an effective tool to study the friction and wear of reciprocating pair with high velocity. The effects of fish scale textured piston pair supply a theory lead to design the reciprocating pair with better friction performance.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-09-2019-0398

Details

Industrial Lubrication and Tribology, vol. 72 no. 4
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 5 January 2015

Yong Guo and Songfeng Li

The purpose of this paper is to analyze several measures which the government of the People’s Republic of China (PRC) has adopted to curb corruption and to make…

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Abstract

Purpose

The purpose of this paper is to analyze several measures which the government of the People’s Republic of China (PRC) has adopted to curb corruption and to make recommendations to curb the spread of corruption.

Design/methodology/approach

The study is based on the analysis of government policy documents and reports, and statistical data on anti-corruption measures in China.

Findings

During the past ten years, the government of the PRC has adopted these anti-corruption measures: first, increasing the ability to handle cases for deterring corrupt officials; second, improving the work style of officials and prohibiting them from enjoying special privileges, and promoting moral behavior among them; third, reforming the economic and political system to reduce corruption opportunities; and fourth, reforming the Central Commission for Discipline Inspection (CCDI) to more effectively handle corruption cases. Nevertheless, in despite of these anti-corruption measures, there remain serious challenges for reducing corruption stemming from an irrational system of administrative reform and balancing the relationship between the CCDI and the judiciary departments to enhance the professionalism and efficiency of the anti-corruption agencies, which continue to constrain China’s current anti-corruption efforts. Therefore, the Chinese government should take a top-down approach, analyze the characteristics and trends of corruption in the new era, strengthen the institutional structures, and strive to suppress the spread of corruption.

Originality/value

This paper will be useful for those scholars, policy-makers and anti-corruption practitioners who are interested in China’s anti-corruption measures.

Details

Asian Education and Development Studies, vol. 4 no. 1
Type: Research Article
ISSN: 2046-3162

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Book part
Publication date: 7 January 2015

This chapter examines the development of accounting thought and practices in China with the purpose of illustrating its relevance to current accounting policies and…

Abstract

This chapter examines the development of accounting thought and practices in China with the purpose of illustrating its relevance to current accounting policies and practices. The review indicates that changes in accounting in China did not usually occur completely and easily. Over the past three decades, while Chinese accounting has gradually moved toward the Anglo-American model, convergence has presented unique features in China. For example, the review suggests that the accounting reforms in China have been heavily government-driven and that uniform accounting systems still remain. Chinese regulators maintain a cautious attitude toward the application of fair value and professional judgment, which are essentially the center of the Anglo-American accounting system. Furthermore, Chinese accounting regulators have a different view of business combinations from the IASB and have developed alternative accounting methods for those transactions. China’s departure from IFRS reflects its politico-economic context and essentially challenges the IASB’s goal of achieving international accounting convergence. China’s approach to internationally acceptable practices is likely to have implications for the effectiveness of the imported ideas.

Details

Adoption of Anglo-American Models of Corporate Governance and Financial Reporting in China
Type: Book
ISBN: 978-1-78350-898-3

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Article
Publication date: 5 March 2013

Du Yong and Li Guo-qiang

Calculation methods have been developed for application to advanced fire-resistance design. The loading-bearing capacity method involves the performance of a structural…

Abstract

Calculation methods have been developed for application to advanced fire-resistance design. The loading-bearing capacity method involves the performance of a structural analysis for a fire situation using the computer-based finite element method, and checks the loading-bearing capacity of the structure in a fire ultimate limit state. There is a case of a steel roof grid structure fire-resistant assessment to illustrate the basic steps in the loading-bearing capacity method for structural fire safety design. A detailed finite element analysis of a space truss with a credible design fire was carried out to determine the deflections and forces in the space truss, and checked by the fire ultimate limit state. The present data and analysis demonstrate that the loading-bearing capacity method is sufficient for fire safety design.

Details

Journal of Structural Fire Engineering, vol. 4 no. 1
Type: Research Article
ISSN: 2040-2317

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Article
Publication date: 5 January 2015

Jon S. T. Quah and Chilik Yu

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195

Abstract

Details

Asian Education and Development Studies, vol. 4 no. 1
Type: Research Article
ISSN: 2046-3162

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Article
Publication date: 1 April 2014

Yan-Hong Yao, Ying-Ying Fan, Yong-Xing Guo and Yuan Li

This paper aims to explore the influences of leadership and work stress on employee behavior, and the moderating effects of transactional and transformational leadership…

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9553

Abstract

Purpose

This paper aims to explore the influences of leadership and work stress on employee behavior, and the moderating effects of transactional and transformational leadership on the relationship between work stress and employee negative behavior.

Design/methodology/approach

Using convenience sampling method, the authors investigated employees from 20 firms in different places and industries, and 347 valid questionnaires were collected. SPSS18.0 statistical analysis software was used for reliability and validity analysis, descriptive statistics, correlation analysis and hierarchical regression analysis to test the hypothesis.

Findings

The empirical results show that there is a positive correlation between work stress and employee negative behavior. Transformational leadership has negative impacts on work stress and employee negative behavior, whereas transactional leadership has positive influences. Moreover, transactional leadership strengthens the influence of work stress on employee negative behavior, whereas transformational leadership has no moderating effect.

Practical implications

First, enterprises should take employees’ stress tolerance into account in selection and recruitment, and enhance stress management. Second, by demonstrating inspirational vision and personal charisma, open leadership style, rather than short-term transactional behavior, will motivate subordinates more effectively. Finally, distribution system should be improved to achieve principle and procedural justice.

Originality/value

The paper extends the research on employee behavior by investigating the impacts of leadership and work stress. According to Chinese social, economic and cultural characteristics, this research examines the influence of contemporary Chinese mindset and pluralistic values on employee behavior. Open leadership is proposed as a new leadership style, which contributes to improving leadership behavior and preventing negative behavior in workplace.

Details

Chinese Management Studies, vol. 8 no. 1
Type: Research Article
ISSN: 1750-614X

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Article
Publication date: 5 January 2015

Jon S. T. Quah

The purpose of this paper is threefold: first, to ascertain the levels of effectiveness of the anti-corruption agencies (ACAs) in China, Japan, Philippines, Singapore and…

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1243

Abstract

Purpose

The purpose of this paper is threefold: first, to ascertain the levels of effectiveness of the anti-corruption agencies (ACAs) in China, Japan, Philippines, Singapore and Taiwan; second, to explain why some of these ACAs are more effective than others; and third, to suggest some policy recommendations for addressing their limitations.

Design/methodology/approach

This paper relies on three well-known international indicators to assess the perceived extent of corruption in the five countries. Similarly, their quality of governance is assessed by their total percentile rank on the World Bank’s six governance indicators in 2013.

Findings

Singapore’s Corrupt Practices Investigation Bureau is effective because of its government’s political will and favorable policy context. The Philippines and Taiwan rely on ineffective multiple ACAs, which are inadequately staffed and funded, and compete with each other for limited resources. China’s Central Commission for Discipline Inspection is ineffective because corrupt party members are disciplined and not prosecuted, and the political leaders use corruption as a weapon against their opponents. Japan’s weak political will is reflected in its reluctance to address its structural corruption. This paper concludes with policy recommendations for enhancing the effectiveness of the ACAs in the five countries.

Originality/value

The comparative analysis of the effectiveness of the ACAs in the five Asian countries and the policy recommendations for addressing their limitations will be of interest to policy makers, scholars and anti-corruption practitioners.

Details

Asian Education and Development Studies, vol. 4 no. 1
Type: Research Article
ISSN: 2046-3162

Keywords

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Book part
Publication date: 15 September 2017

Jingjing Yang and Hao-Chang Sung

We analyze the economic consequence of government intervention on the incidence of accounting fraud and audit fees of both Big 4 and local big auditors on Chinese audit…

Abstract

We analyze the economic consequence of government intervention on the incidence of accounting fraud and audit fees of both Big 4 and local big auditors on Chinese audit market in the period 2006–2013. In 2009, Chinese government issued favorable polices to local big auditors and required certain Chinese companies to give priority to these auditors. We find that market share of Big 4 auditors is quite stable before and after government intervention, but market share of local big auditors increases at the cost of local small auditors after intervention. Although audit fee premiums of both local big and Big 4 auditors have increased after intervention, the positive effect of local big auditors on audit fee premiums has significantly decreased. Further, both Big 4 and local big auditors are not likely to reduce the incidence of accounting fraud in pre- and post-intervention period. Our results suggest that Chinese government support to local auditors does not significantly enhance these auditors’ competitiveness in terms of audit fee and audit quality.

Details

Advances in Pacific Basin Business Economics and Finance
Type: Book
ISBN: 978-1-78743-409-7

Keywords

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