Search results

The purpose of this paper is to investigate the monitoring of the friction condition of mechanical seals.

Acoustic emission signals from the friction of the seal end face were obtained, and their bispectral characteristics were extracted. The variation of non-Gaussian information with the degree of friction was investigated, and by combining bispectral characteristics with information entropy, a bispectral entropy index was established to represent the friction level of the seal end face.

In the start-up stage, the characteristic frequency amplitude of the micro-convex body contact is obvious, the friction of the end face is abnormal, the complexity of the system increases in a short time and the bispectral entropy rises continuously in a short time. In the stable operation stage, the characteristic frequency amplitude of the micro-convex body contact varies with the intensity of the seal face friction, the seal face friction is stable and the bispectral entropy fluctuates up and down for a period of time.

The bispectral analysis method is applied to the seal friction monitoring, the seal frequency domain characteristics are extracted, the micro-convex body contact characteristic frequency is defined and the bispectral entropy characteristic index is proposed, which provides a certain theoretical basis for the mechanical seal friction monitoring.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2023-0242/

Given the regional diversity in China, this study aims to provide an empirical evaluation of how organizational stakeholders (i.e. customers, employees, suppliers and shareholders) affect corporate environmental sustainability investment (ESI).

To empirically investigate the influence of organizational stakeholders on ESI, this study used regional-level data consists of Chinese A-share stocks for the years 2009–2019.

This study’s findings show that pressure from customers, employees and suppliers has a significant effect on corporate ESI, with customers being the most important stakeholder group. Shareholders, by contrast, have no significant influence on ESI. The influence of these pressures is more pronounced in developed regions (the east) than in less developed (the west) localities of China.

This study complements the stakeholder–institutional perspective by implying to consider the differentiated logics of the contesting stakeholders in the nonmarket operations.

Practically, this study poses that managers must realize the heterogeneity of pressures from stakeholders and the differentiated impact of these pressures keeping in view the institutional differences in different regions.

Our study reports initial empirical evidence that shows how regional differences influence the role of stakeholders in determining corporate environmental strategy.

The purpose of this paper is to investigate the dynamic characteristics of spiral groove liquid film seal under the effect of thermal–fluid–solid coupling.

The dynamic analysis model of spiral groove liquid film seal under the effect of thermal–fluid–solid coupling was established by perturbation method. The steady-state and perturbation Reynolds equations were solved, and the steady-state sealing performance and dynamic characteristic coefficients of the liquid film were obtained.

Compared with the liquid film without coupling method, a divergent seal gap is formed between the seal rings under the effect of thermal–fluid–solid coupling, the minimum liquid film thickness decreases, the dynamic stiffness and damping coefficients of the liquid film are increased and the thermoelastic deformation of the end-face improves the dynamic performance of the liquid film seal.

The dynamic characteristics of the spiral groove liquid film seal under the effect of thermal–fluid–solid coupling are studied, which provides a theoretical reference for optimizing the dynamic performance of the non-contacting liquid film seal.

When a manipulator captures an unknown space object, inertia parameters of endpoint payload should be timely obtained to handle possible unexpected parameter variations and monitor the system’s operating conditions. Therefore, this study aims to present an identification method for estimating the inertia parameter of the payload carried by a flexible two-link space manipulator.

The original nonlinear dynamics model of the manipulator is linearized at a selected working point. Subsequently, the system modal frequencies with and without payload are determined using the subspace identification algorithm, and the difference of these frequencies is computed. Furthermore, by adjusting the structural configuration of the manipulator, multiple sets of frequency differences are obtained. Therefore, the inertia parameters of the payload, i.e. the mass and the moment of inertia, can be derived from the frequency differences by solving a least-squares problem.

The proposed method can effectively estimate the payload parameters and has satisfactory identification accuracy.

The approach’s implementation provides a practical reference for determining inertia parameters of an unknown space target in the capture process.

The study proposes a novel method for identifying the inertia parameters of the payload of a flexible two-link space manipulator using the estimated system frequencies.

With the development of data mining technology, diverse and broader domain knowledge can be extracted automatically. However, the research on applying knowledge mapping and data visualization techniques to genealogical data is limited. This paper aims to fill this research gap by providing a systematic framework and process guidance for practitioners seeking to uncover hidden knowledge from genealogy.

Based on a literature review of genealogy's current knowledge reasoning research, the authors constructed an integrated framework for knowledge inference and visualization application using a knowledge graph. Additionally, the authors applied this framework in a case study using “Manchu Clan Genealogy” as the data source.

The case study shows that the proposed framework can effectively decompose and reconstruct genealogy. It demonstrates the reasoning, discovery, and web visualization application process of implicit information in genealogy. It enhances the effective utilization of Manchu genealogy resources by highlighting the intricate relationships among people, places, and time entities.

This study proposed a framework for genealogy knowledge reasoning and visual analysis utilizing a knowledge graph, including five dimensions: the target layer, the resource layer, the data layer, the inference layer, and the application layer. It helps to gather the scattered genealogy information and establish a data network with semantic correlations while establishing reasoning rules to enable inference discovery and visualization of hidden relationships.

The authors point out that the existing research confuses the operational liabilities formed based on the “transaction” relationship with the financial liabilities formed based on the “investment” relationship, which not only exaggerates the value of leverage but also underestimates the level of protection that companies provide for creditors alone. That is, the confusion of concepts not only triggers the problem of leverage misestimate but also triggers the short-term financial risk misestimate. The performance of “nominal leverage” and “nominal short-term solvency” based on total assets calculation cannot reflect the real leverage level and the real short-term financial risk of enterprises.

To distinguish the concepts of “assets” and “capital” and rationalize the relationship between “transactions” and “investments”, authors systematically design the “real leverage” indicators and “real short-term solvency” indicators, and measure the degree of misestimate of leverage and short-term financial risk indicators by traditional research. On this basis, this paper describes and analyses the trends of leveraged misestimate and short-term financial risk misestimate of listed companies in China and analyses which companies have more serious leverage misestimate. And it helps readers to form an objective understanding of the leveraged misestimate and short-term financial risk misestimate of listed companies in China.

Firstly, the overall high level of leverage of listed companies in China in the traditional sense is largely because of the misestimate of indicators. And this kind of misestimate is more serious among firms that have advantages in trading, such as state-owned enterprises and firms with higher market shares. Secondly, for most firms with normal solvency, traditional research systematically overestimated the negative impact of “nominal leverage” on financial risk indicators (represented by short-term solvency). The overestimation is significant in firms with serious leverage misestimate. Thirdly, indicators’ misestimate of the traditional research makes the banks cannot make effective credit decisions according to the firm's “real leverage” and “real short-term solvency”.

Firstly, clarify the differences between the concepts of “assets” and “capital”, and clarify the level of “real leverage” of listed companies in China, which is conducive to the process of “de-leveraging”. Secondly, revise the problem of misestimate of related indicators, so that financial institutions can clearly identify the true profitability and real risk level of the entity domain, and thus improve the effectiveness of credit decisions.

With the development of information technology, there is a growing trend for internet enterprises in China to launch internet-only banks. This paper aims to explore how the brand trust in an internet enterprise is transferred to the initial trust in its affiliated internet-only bank and how such transfer affects adoption behavior of potential internet-only banking users.

Data were obtained from online questionnaires via a well-known Chinese survey website and a popular Chinese social platform, which yielded 486 usable responses for the analysis. Partial least squares was used for testing hypotheses.

The results show that brand trust in the internet enterprise increases initial trust in its affiliated internet-only bank. This, in turn, enhances the adoption of internet-only banking. More importantly, these results show that brand trust in the internet enterprise transfers to initial trust in internet-only banking through performance expectancy and perceived risk. Further, the need for interaction moderates the relationship between brand trust and performance expectancy as well as the relationship between brand trust and perceived risk.

This study provides new insights into the mechanism by which trust is transferred between two affiliated business entities. The results of the study suggest several useful managerial implications for managing the internet-only banks.

Humility as an important factor for leaders was identified by Collins (2001) and his colleagues in an extensive research project about the leadership qualities of the leaders of companies that transitioned from “good” to “great.” This paper is an empirical study of six factors closely associated with humility and leadership and the purpose of this paper is to identify how Chinese business students and Chinese employees perceive the importance of six factors associated with humility as enlightened leadership.

This paper summarizes recent research about humility and leadership and suggests seven hypotheses about the importance of six factors associated with humility as enlightened leadership.

This study confirms that Chinese respondents affirmed the value of all six factors and identified the statistical significance of three of the factors studied.

A limitation of this study is that it is exploratory in nature and contained many factors that made conducting factor analysis indeterminable. The practical implications of this study are that it provides confirming information about understanding the value system and priorities of Chinese employees and future workers when multi-national companies interact with Chinese partners.

This study provides valuable information about the six factors associated with humility as enlightened leadership. This study is the first of its kind that empirically tests Chinese attitudes associated with humility and leadership.

The purpose of this study is to empirically examine the cause–effect relationships between workplace friendship and knowledge-sharing behavior, from a static perspective. Furthermore, it investigates the bi-directional relationship between the increase in both workplace friendship and knowledge-sharing behavior over same time periods, and also endeavors to identify whether there is a significant negative lagged effect of the increase in both workplace friendship on knowledge-sharing behavior, and vice versa, across time from a dynamic perspective.

The study conducts a three-wave questionnaire survey to test the research model. A latent change score approach was used to test the direct relationship between changes in workplace friendship and changes in knowledge-sharing behavior.

The findings reveal that knowledge-sharing behavior fosters workplace friendship and workplace friendship promotes the emergence of knowledge-sharing behavior. An increase in workplace friendship promotes an increase in knowledge-sharing behavior over same time periods. However, an increase in workplace friendship will lead to a lagged decrease of knowledge-sharing behavior across time, and vice versa.

The time interval in this study is a little short to capture the full changes in workplace friendship. Some important control factors and mediating mechanisms are not included in the research model.

This study guides managers to focus on various motivators to better strengthen workplace friendship and knowledge-sharing behavior and to consider and effectively respond to the negative side of workplace friendship and knowledge-sharing behavior across time.

This study emphasizes the predictivity of one important interaction patterns, namely, knowledge-sharing behavior on friendship at the workplace, from a static perspective. This study also shows the benefits of an increase in workplace friendship for the development of knowledge-sharing behavior in the same time period. Furthermore, the study presents a counterintuitive finding when taking the lag effect into consideration in exploring the relationship between changes both in workplace friendship and knowledge-sharing behavior, and identifies a negative side of both when viewed over longer periods.

This study aims to identify the perceived image of the Greater Bay Area (GBA) cities by university students in Hong Kong through both quantitative and qualitative analysis of the levels of familiarity and favourability, the characteristics of the GBA cities and the personal factors that affect the locational decisions (tourism, education, employment and migration) of the sampled students. This study also classifies both the students and the cities according to their perceived image.

This study, on a sample of university students in Hong Kong, investigated the linkage between their perceived familiarity and favourability of the 11 GBA cities using a questionnaire-based survey (n1 = 617). A follow-up, semi-structured interview (n2 = 32) was then conducted to qualitatively understand the underlying factors that determine the perceived city image and inform the students’ locational decisions.

Geographically, the familiarity-favourability (F-F) analysis indicates that Hong Kong university students are overwhelmingly familiar with and favourable to Hong Kong, Macau and Shenzhen. The 11 cities are classified into development-oriented, have specialized local economy, are personality-based and have a rich history and bring back nostalgic memories. From the F-F scores, Hong Kong students are classified into two main clusters of non-interested students and positive but unfamiliar students. The locational decisions of local students show a relatively stronger magnitude of favourability affecting all four purposes of relocation, an overriding preference for Hong Kong and the high determination of psychological characteristics.

As this study focuses on Hong Kong students as a sample, a further comparative study between mainland Chinese students in the GBA region and Hong Kong could be conducted to extend the main findings of this research.

The idea of “People-to-People Bond”, under the framework of the Belt-and-Road Initiative, and its socio-cultural aspect are emphasized as the key to transnational and regional policy success, which is relevant to the GBA region. The regional policies determine the movement of human capital and the interconnection of places for regional planning and development. The research outcomes correspond with the dearth of knowledge about the relationship between the characteristics of upcoming university graduates, their perceptions of GBA cities as destinations for varied purposes and their ultimate decision for relocation. Their interests and intended movements will exert short-to-long-term social and cultural influences to the region.

The promulgation and implementation of the GBA development plan for providing opportunities for tourism, education, employment and migration for mainland and Hong Kong university students. This research enriches the knowledge about the bottom-up and citizen-oriented approach in regional planning and policy formulation by advancing Govers and Go’s (2009) three-gap branding model and relying on an empirical foundation for these policy initiatives.