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Article
Publication date: 13 June 2019

Rui Zhang, Lei Zhao, Dan Xie, Jinlong Song, Wendong Zhang, Lihu Pan and Yanhua Zhang

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of…

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Abstract

Purpose

This study aims to simulate and test the performance of a transmitting and receiving capacitive micro-machined ultrasonic transducer (CMUT). Aimed at detecting demand of the CMUT, a matched integrated adjustment circuit was designed through analyzing processing methods of transducer’s weak echo signal.

Design/methodology/approach

Based on the analysis of CMUT array structure and work principle, the CMUT units are designed and the dynamic performance analysis of SIMULINK is given according to the demand of underwater detecting. A transceiver isolation circuit is used to make transmission mode and receiving mode separate. A detection circuit is designed based on the transimpedance amplifier to achieve extraction of high-frequency and weak signal.

Findings

Through experimentation, the effectiveness of the CMUT performance simulation and the transceiver integrated adjustment circuit were verified. In addition, the test showed that CMUT with 400 kHz frequency has wider bandwidth and better dynamic characteristics than other similar transducers.

Originality/value

This paper provides a theoretical basis and design reference for the development and application of CMUT technology.

Article
Publication date: 9 May 2022

Lei Zhao, Yingyi Zhang and Chengzhi Zhang

To understand the meaning of a sentence, humans can focus on important words in the sentence, which reflects our eyes staying on each word in different gaze time or times…

Abstract

Purpose

To understand the meaning of a sentence, humans can focus on important words in the sentence, which reflects our eyes staying on each word in different gaze time or times. Thus, some studies utilize eye-tracking values to optimize the attention mechanism in deep learning models. But these studies lack to explain the rationality of this approach. Whether the attention mechanism possesses this feature of human reading needs to be explored.

Design/methodology/approach

The authors conducted experiments on a sentiment classification task. Firstly, they obtained eye-tracking values from two open-source eye-tracking corpora to describe the feature of human reading. Then, the machine attention values of each sentence were learned from a sentiment classification model. Finally, a comparison was conducted to analyze machine attention values and eye-tracking values.

Findings

Through experiments, the authors found the attention mechanism can focus on important words, such as adjectives, adverbs and sentiment words, which are valuable for judging the sentiment of sentences on the sentiment classification task. It possesses the feature of human reading, focusing on important words in sentences when reading. Due to the insufficient learning of the attention mechanism, some words are wrongly focused. The eye-tracking values can help the attention mechanism correct this error and improve the model performance.

Originality/value

Our research not only provides a reasonable explanation for the study of using eye-tracking values to optimize the attention mechanism but also provides new inspiration for the interpretability of attention mechanism.

Details

Aslib Journal of Information Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2050-3806

Keywords

Article
Publication date: 10 March 2022

Yingwei Ren, Biqian Zhang, Lei Zhao and Yinwei Bu

Performance pressure is unavoidable in the career of any frontline employee in the service industry, yet the authors have little understanding of the dualistic nature of…

Abstract

Purpose

Performance pressure is unavoidable in the career of any frontline employee in the service industry, yet the authors have little understanding of the dualistic nature of performance pressure. This study aims to distinguish between challenge performance pressures and hindrance performance pressure and to investigate the effect of challenge/hindrance performance pressure on in-role/extra-role service performance through distinct emotional-labor-strategy mechanisms.

Design/methodology/approach

Study 1 conducted exploratory and confirmatory factor analyses and developed a performance pressure scale. To test the predictive validity of this scale, Study 2 used data from 178 frontline employees based on diary and experience sampling spanning 18 consecutive calendar days.

Findings

Findings revealed that surface/deep acting mediated the relationship between hindrance/challenge performance pressure and in-role/extra-role service performance. Calling moderated the relationship between emotional labor and service performance. The relationship between surface acting and in-role service performance was weaker in the higher calling condition, whereas the relationship between deep acting and extra-role service performance was weaker in the higher calling condition.

Practical implications

Service organizations should motivate employees to preserve more challenge performance pressure rather than hindrance performance pressure through establishing a reasonable performance target system. Furthermore, organizations can encourage employees to provide more extra-role services for customers through establishing an emotional support system, so as to enhance customer satisfaction.

Originality/value

To the best of the authors’ knowledge, this study is a pioneering effort to develop a dualistic performance pressure scale and explore the impact mechanism and boundary conditions of performance pressure on service performance in the presence of emotional labor.

Details

Nankai Business Review International, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-8749

Keywords

Article
Publication date: 6 August 2021

Charanjit Singh, Lei Zhao, Wangwei Lin and Zhen Ye

Machine learning is having a major impact on banking, law and other organisations. The speed with which this technology is developing to undertake tasks that are not only…

Abstract

Purpose

Machine learning is having a major impact on banking, law and other organisations. The speed with which this technology is developing to undertake tasks that are not only complex and technical but also time-consuming and that are subject to constantly changing parameters is astounding. The purpose of this paper is to explore the extent to which machine learning can be used as a solution to lighten the compliance and regulatory burden on charitable organisations in the UK; so that they can comply with their regulatory duties and develop a coherent and streamlined action plan in relation to technological investment.

Design/methodology/approach

The subject is approached through the analysis of data, literature and domestic and international regulation. The first part of the study summarises the extent of current regulatory obligations faced by charities, these are then, in the second part, set against the potential technological solutions provided by machine learning as of July 2021.

Findings

It is suggested that charities can use machine learning as a smart technological solution to ease the regulatory burden they face in a growing and impactful sector.

Originality/value

The work is original because it is the first to specifically explore how machine learning as a technological advance can assist charities in meeting the regulatory compliance challenge.

Details

Journal of Financial Crime, vol. 29 no. 1
Type: Research Article
ISSN: 1359-0790

Keywords

Article
Publication date: 17 August 2021

Qiliang Liu, Lei Zhao, Li Tian and Jian Xie

This paper aims to investigate whether close auditor-client relationships affect audit quality over the tenure of the audit partner and the potential role of partner…

Abstract

Purpose

This paper aims to investigate whether close auditor-client relationships affect audit quality over the tenure of the audit partner and the potential role of partner rotation in mitigating this effect.

Design/methodology/approach

Using the Chinese mandatory audit partner rotation setting, the authors identify the existence of a close auditor-client relationship if the audit partner tenure with a client is larger than the audit firm tenure with that client. The sample period (1998–2009) is divided into voluntary and mandatory rotation periods when examining the effects of audit partner tenure on audit quality for the normal and close auditor-client relationship subsamples, respectively. The authors also conduct a propensity score matching analysis to address a selection issue.

Findings

The paper finds that under the voluntary partner rotation regime, audit quality decreases with audit partner tenure for the subsample with close auditor-client relationships, whereas this effect is not shown in the normal relationship subsample. However, audit quality no longer declines with audit partner tenure under the mandatory partner rotation regime.

Originality/value

This is the first study that directly examines the effect of audit partner tenure on audit quality associated with close auditor-client relationships under the voluntary and mandatory partner rotation regimes.

Details

Managerial Auditing Journal, vol. 36 no. 6
Type: Research Article
ISSN: 0268-6902

Keywords

Article
Publication date: 5 June 2017

Lei Zhao and Theodor Freiheit

This paper aims to examine the perceptions of good design attributes and propose a model to estimate their relative importance through fundamental drivers. Design…

Abstract

Purpose

This paper aims to examine the perceptions of good design attributes and propose a model to estimate their relative importance through fundamental drivers. Design activities must understand and meet customer and producer expectations and deliver products in a profitable manner. Requirements analysis is conducted to understand customer expectations, but in new product development, this information can be available too late in the development cycle. Moreover, customer needs are often unclear to designers at early stages of design, with customers often unable to articulate their requirements or unaware of how a new product may solve problems or create complications. Evaluating non-product-specific drivers to generalized good product design attributes can help designers estimate important factors in early requirements analysis.

Design/methodology/approach

Quantification of the weight designers place in their mental models of what makes up a good product is determined from linear regression modeling, providing a more concrete evaluation of inherently subjective perceptions. A survey is deployed using Mechanical TurkTM to collect perceptions of good product attributes and drivers through product case studies. Data are analyzed using a utility theory framework and importance of attributes is estimated from the importance of drivers.

Findings

A generalized model that estimates good design attributes from drivers is presented. This study also demonstrates that non-product-specific attribute importance can be extracted from specific product cases. An application example demonstrating the relative importance of good design attributes is given for different types of watches.

Research limitations/implications

The approach is intended to supplement ordinary product design and development processes, and is not intended to replace market research and concept testing activities. Model coefficient weights are dependent on the quality of the data that was collected, which has limitations. While the current study included confounding variables, introducing interactions into the model could make attribute importance prediction more accurate.

Practical implications

While design requirements analysis is now central to modern design practice, these estimates can be available too late in the development cycle, especially when customers have no experience with the product type. The developed model quantifies design attributes that consumers, manufacturers and society as a whole use to distinguish if a product will be considered well designed. Product designers can better focus their development resources toward good design attributes based on guidance generated from generalized drivers.

Originality/value

Historically, requirements analysis is undertaken specific to the product being designed. This paper provides a model to give designers early guidance in a non-product-specific framework. The framework also considers good design attributes as holistic, including societal and producer concerns. Although all of the proposed good design attributes can be associated with a well-engineered product, it is unnecessary to design a product that performs exceptionally on every attribute. This model provides identification of the handful of attributes that can make the most significant difference for design success.

Details

Journal of Engineering, Design and Technology, vol. 15 no. 03
Type: Research Article
ISSN: 1726-0531

Keywords

Article
Publication date: 21 September 2012

Yong Zhao and Wei Qiu

The purpose of this paper is to review the major systemic educational reforms that China has undertaken over the past three decades and analyze the reasons behind their

1974

Abstract

Purpose

The purpose of this paper is to review the major systemic educational reforms that China has undertaken over the past three decades and analyze the reasons behind their different degrees of success.

Design/methodology/approach

Two running themes are identified among various reforms on the Chinese educational system: decentralization and marketization. The authors explore the driving forces behind these reforms and discuss whether the reforms were successful or not.

Findings

In conclusion, the authors highlight four takeaway lessons of Chinese educational reforms.

Originality/value

This is an original discussion of educational reforms in China in the contexts of decentralization and marketization.

Details

On the Horizon, vol. 20 no. 4
Type: Research Article
ISSN: 1074-8121

Keywords

Book part
Publication date: 6 April 2021

Fatih Pinarbasi and Ibrahim Kircova

Today’s business environment has the nature that challenges the decision-making processes of businesses with its many different factors including technological…

Abstract

Today’s business environment has the nature that challenges the decision-making processes of businesses with its many different factors including technological developments and changing consumer structures. Previous research focused on specific contexts of the business environment regarding marketing and innovation issues, however, an integrative approach can be helpful for understanding and taking actions. This study aims to present a comprehensive framework which employs sensemaking from management literature as an approach to evaluate the market environment. Following a conceptual approach for the methodology, a framework consisting of three stages: discovery, sensemaking, and prediction is included in the study. Proposed framework identifies the stages for the sensemaking of consumers and can guide marketing decision-makers for competitiveness in the digital world.

Details

Strategic Outlook in Business and Finance Innovation: Multidimensional Policies for Emerging Economies
Type: Book
ISBN: 978-1-80043-445-5

Keywords

Article
Publication date: 21 September 2012

Gaoming Zhang, Yong Zhao and Jing Lei

Over the past few decades China's higher education has gone through dramatic growth and multiple rounds of reforms accompanied by a remarkable amount of financial

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Abstract

Purpose

Over the past few decades China's higher education has gone through dramatic growth and multiple rounds of reforms accompanied by a remarkable amount of financial investment, all aiming at developing world‐class universities to grow innovative talents. Yet the outcomes so far have been disappointing. This paper aims to investigate this issue.

Design/methodology/approach

By reviewing and analyzing selected educational reforms in higher education in China, this article discusses the reasons of the gap between the massive input for innovation in higher education in China and abysmal results. This paper also reports and analyzes a case that challenges central control and the gaokao system.

Findings

Central control and the gaokao, the infamous college entrance exam, are the bedrocks of China's higher education and also the culprit for China's failure to cultivate innovative talents. Unless they are fundamentally changed it is unlikely that China will have the higher education system it dreams of having.

Originality/value

This article provides an overview of China's efforts to cultivate innovative talents by strategically investing in building world‐class higher education institutions (HEIs) and analyzes the reasons behind the apparent gap between its massive input and the abysmal results achieved.

Details

On the Horizon, vol. 20 no. 4
Type: Research Article
ISSN: 1074-8121

Keywords

Book part
Publication date: 5 June 2013

Xiaoyan Lei, Chuanchuan Zhang and Yaohui Zhao

China’s new rural pension program (NRPP), a fully funded defined contribution plan among the rural residents with heavy government subsidy toward contributions, has…

Abstract

China’s new rural pension program (NRPP), a fully funded defined contribution plan among the rural residents with heavy government subsidy toward contributions, has expanded rapidly since its introduction in 2009, and is expected to achieve universal coverage by the end of 2012. Empirical evidence, however, shows that although those close to pension eligibility age are enthusiastic, take-up rate is low among younger people, and participants tend to choose plans with the least contribution requirements, threatening the long-term viability of the program. We calculate the net benefits of participation on behalf of rural residents and demonstrate that poor designs are responsible for these problems. A proper rate of return on individual investment is not only essential for encouraging participation and ensuring a higher replacement rate but will also require less government subsidy and relieve fiscal burdens on the government.

Details

Labor Market Issues in China
Type: Book
ISBN: 978-1-78190-756-6

Keywords

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