Zhirong Zhong, Heng Jiang, Jiachen Guo and Hongfu Zuo
The aero-engine array electrostatic monitoring technology (AEMT) can provide more and more accurate information about the direct product of the fault, and it is a novel condition…
Abstract
Purpose
The aero-engine array electrostatic monitoring technology (AEMT) can provide more and more accurate information about the direct product of the fault, and it is a novel condition monitoring technology that is expected to solve the problem of high false alarm rate of traditional electrostatic monitoring technology. However, aliasing of the array electrostatic signals often occurs, which will greatly affect the accuracy of the information identified by using the electrostatic sensor array. The purpose of this paper is to propose special solutions to the above problems.
Design/methodology/approach
In this paper, a method for de-aliasing of array electrostatic signals based on compressive sensing principle is proposed by taking advantage of the sparsity of the distribution of multiple pulse signals that originally constitute aliased signals in the time domain.
Findings
The proposed method is verified by finite element simulation experiments. The simulation experiments show that the proposed method can recover the original pulse signal with an accuracy of 96.0%; when the number of pulse signals does not exceed 5, the proposed method can recover the pulse peak with an average absolute error of less than 5.5%; and the recovered aliased signal time-domain waveform is very similar to the original aliased signal time-domain waveform, indicating that the proposed method is accurate.
Originality/value
The proposed method is one of the key technologies of AEMT.
Details
Keywords
Jiachen Guo, Heng Jiang, Zhirong Zhong, Hongfu Zuo and Huan Zhang
Electrostatic monitoring technology is a useful tool for monitoring and detecting component faults and degradation, which is necessary for engine health management. This paper…
Abstract
Purpose
Electrostatic monitoring technology is a useful tool for monitoring and detecting component faults and degradation, which is necessary for engine health management. This paper aims to carry out online monitoring experiments of turbo-shaft engine to contribute to the practical application of electrostatic sensor in aero-engine.
Design/methodology/approach
Combined with the time and frequency domain methods of signal processing, the authors analyze the electrostatic signal from the short timescale and the long timescale.
Findings
The short timescale analysis verifies that electrostatic sensor is sensitive to the additional increased charged particles caused by abnormal conditions, which makes this technology to monitor typical failures in aero-engine gas path. The long scale analysis verifies the electrostatic sensor has the ability to monitor the degradation of the engine gas path performance, and water washing has a great impact on the electrostatic signal. The spectrum of the electrostatic signal contains not only the motion information of the charged particles but also the rotating speed information of the free turbine.
Practical implications
The findings in this article prove the effectiveness of electrostatic monitoring and contribute to the application of this technology to aero-engine.
Originality/value
The research in this paper would be the foundation to achieve the application of the technology in aero-engine.
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Xhimi Hysa, Mario D’Arco and Joana Kostaqi
This chapter explores young individuals’ attitude toward protection of personal data. Specifically, the discussion focuses on the General Data Protection Regulation (GDPR) and the…
Abstract
This chapter explores young individuals’ attitude toward protection of personal data. Specifically, the discussion focuses on the General Data Protection Regulation (GDPR) and the introduction of a property right over personal data. To this end, a total of 10 in-depth interviews were conducted with both Albanian and Italian college students. Transcribed data from the interviews were analyzed through thematic analysis. Four main themes emerged from the interviews: (i) distrust toward the way personal data are used online, (ii) no change in behavior after the introduction of GDPR, (iii) limited knowledge regarding terms and conditions of websites, and (iv) individual desire for more control over his/her data. In light of the research findings, the present contribution highlights that, despite the GDPR enhances individuals’ data protection and rights, there is an intention–behavior gap that has been labeled in the literature as “privacy paradox.” Furthermore, findings reveal that treating personal data as a property right has pros and cons.
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Cheng-Yu Lin, En-Yi Chou and Heng-Chiang Huang
Social networking sites (SNSs) have significantly influenced people's lives and changed their behavior. Although previous research has explored self-disclosure in virtual…
Abstract
Purpose
Social networking sites (SNSs) have significantly influenced people's lives and changed their behavior. Although previous research has explored self-disclosure in virtual communities, little is known about the impact of other users, particularly their online social support, on self-disclosure. The aim of this study is to explore how online social support dimensions (i.e., emotional, informational, esteem, instrumental and network support) influence people's self-disclosure, which in turn affects their commitment to SNSs.
Design/methodology/approach
Based on social exchange theory, this study proposes a research model that explores the role of other users on self-disclosure. This study collects data from a sample of 558 respondents and applies the structural equation modeling technique to test the research model.
Findings
The findings show that users are motivated to disclose information and commit to a specific SNS because of the supportive climate. Results also show that self-disclosure mediates the effect of online social support on users' commitment to SNSs.
Originality/value
This study focuses on the influence of other users' roles on self-disclosure on SNSs, extending the application of social exchange theory.
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Keywords
Dennis B.K. Hwang and A. Blair Staley
Seeks to analyze the impact of recent accounting and auditing failures in the USA on US accounting and auditing in China, focusing on the practice of guanxi – the networks of…
Abstract
Purpose
Seeks to analyze the impact of recent accounting and auditing failures in the USA on US accounting and auditing in China, focusing on the practice of guanxi – the networks of informal relationships and exchanges of favors that dominate all business and social activities in Chinese societies.
Design/methodology/approach
Examines Chinese culture and uses historical precedents and parallels with Japanese culture to predict potential accounting and auditing problems.
Findings
Determines that guanxi has the potential to undermine the high standards of auditor independence, audit quality, and ethical behavior to which auditors must adhere.
Research limitations/implications
The review of Chinese culture and list of historical precedents is not exhaustive, and the standards are all US, which perhaps limits its usefulness elsewhere.
Practical implications
A very useful source of information on Chinese business behavior as it impacts accountants and auditors.
Originality/value
Enables policy makers and professional accountants to anticipate and predict how guanxi may threaten the progress made in improving financial management and reporting, and may undermine auditor independence, audit quality, and the quality of financial reporting.
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Keywords
Weiting Huang, Jia He and GuiJun Zhang
The purpose of this paper is to investigate the main determinants of consideration in China's non-tradable shares reform. The primary objective is to dig into the institutional…
Abstract
Purpose
The purpose of this paper is to investigate the main determinants of consideration in China's non-tradable shares reform. The primary objective is to dig into the institutional factors that affect consideration in China's non-tradable shares reform.
Design/methodology/approach
The authors examine a sample of 846 state-owned enterprises (SOEs) that have finished the non-tradable shares reform during 2005-2009. Using the multiple liner regression, the authors discuss the important factors which affect consideration.
Findings
The authors find that ownership reconstruction form and capital occupation are very important determinants of consideration. The main factor which affects controlling shareholders’ capital occupation is the form of ownership reconstruction. Capital occupation of incompletely ownership reconstructed companies is more serious than those of complete ownership reconstructed companies. Furthermore, companies of incomplete ownership reconstruction and higher capital occupation paid higher consideration as a compensation for the expropriation of tradable shareholders’ benefit during the shares split period.
Originality/value
This study provides not only a deeper understanding of the reform of non-tradable shares but also an important empirical reference for reform of SOEs in China.