Search results

The purpose of this paper is to investigate the superior relationship between blood lipid- and cardiovascular disease (CVD)-related hematological parameters using superior grey relational analysis (GRA).

A total of 294 individuals who underwent simultaneous routine blood examination and blood lipid examination in the Physical Examination Center of the First Affiliated Hospital of Shantou University Medical College were included in this study. Superior GRA was performed to find out the superior factor in CVD-related hematological parameters and blood lipids. CVD-related hematological parameters included red blood cell distribution width, white cell count, and platelet count, platelet distribution width, mean platelet volume, as well as platelet crit. The indicators of blood lipids analyzed here consist of low-density lipoprotein, high-density lipoprotein, triglyceride and total cholesterol.

The results showed that all the grey relational degree of hematological parameters and blood lipids were over 0.8; the superior factor in hematological parameters was PLT, whereas TC was the superior factor in blood lipids.

Findings of this study suggested that hematological parameters are closely related to blood lipids and a potential role for hematological parameters in the prediction of dyslipidemia, which need further study; TC has the greatest influence on hematological parameters, whereas TG displays a minimal impact.

To the authors’ best knowledge, it was the first study to analyze the relationship between various CVD-related hematological parameters and blood lipids via superior GRA.

This paper aims to clarify the relationship between the cone bit seal failure and the down-hole drilling fluid pressure and high temperature that occur during ultra-deep well drilling. It proposes that the contact pressure distribution under low pressure conditions is favourable for lubrication and the seal inner wear is serious under high pressure conditions. Furthermore, the more reliable cone bit seal can be obtained using the back propagation (BP) neural network and genetic algorithm (GA) to reduce the drilling cost.

The wear morphologies of the seal surface were analyzed using Contour GT-K to determine the seal contact pressure distribution. Then, the influences of the drilling fluid pressure and high temperature on the metal seal interface were analyzed using finite element method. The structural parameters of the seal under high pressure were optimized based on the BP neural network and GA.

This paper proposes that the inner seal contact pressure increases rapidly with an increase in the drilling fluid pressure. The design parameters of the seal components should be adjusted reasonably to ensure that the outer contact pressure is greater than the inner contact pressure, which is advantageous for forming a lubricant film on the inner side of the seal. The uneven temperature distribution of the seal surface will further aggravate seal failure.

Study on the bit seal with good property is significant in drilling application, and the optimized seal can prolong the cone bit life.

Ignition process is a critical issue in combustion systems. It is particularly important for reliability and safety prospects of aero-engine. This paper aims to numerically investigate the burner-to-burner propagation during ignition process in a full annular multiple-injector combustor and then validate it by comparing with experimental results.

The annular multiple-injector experimental setup features 16 swirling injectors and two quartz tubes providing optical accesses to high-speed imaging of flames. A Reynolds averaged Navier–Stokes model, adaptive mesh refinement (AMR) and complete San Diego chemistry are used to predict the ignition process.

The ignition process shows an overall agreement with experiment. The integrated heat release rate of simulation and the integrated light intensity of experiment is also within reasonable agreement. The flow structure and flame propagation dynamics are carefully analyzed. It is found that the flame fronts propagate symmetrically at an early stage and asymmetrically near merging stage. The flame speed slows down before flame merging. Overall, the numerical results show that the present numerical model can reliably predict the flame propagation during the ignition process.

The dedicated AMR method together with detailed chemistry is used for predicting the unsteady ignition procedure in a laboratory-scale annular combustor for the first time. The validation shows satisfying agreements with the experimental investigations. Some details of flow structures are revealed to explain the characteristics of unsteady flame propagations.

Viscous dampers are commonly used in large span cable-stayed bridges to mitigate seismic effects and have achieved great success.

However, the nonlinear analysis on damper parameters is usually computational intensive and nonobjective. To address these issues, this paper proposes a simplified method to determine the viscous damper parameters for double-tower cable-stayed bridges. An empirical formula of the equivalent damping ratio of viscous dampers is established through decoupling nonclassical damping structures and linearization of nonlinear viscous dampers. Shaking table tests are conducted to verify the feasibility of the proposed method. Moreover, this simplified method has been proved in long-span cable-stayed bridges.

The feasibility of this method is verified by the simplified model shaking table test. This simplified method for determining the parameters of viscous dampers is verified in cable-stayed bridges with different spans.

This simplified method has been validated in cable-stayed bridges with various spans.

Drawing on the knowledge-based view, the purpose of this paper is to investigate the interrelationship between Knowledge Management (KM) processes, Knowledge Worker Satisfaction (KWS) and Organizational Performance (OP). Additionally, the study further seeks to identify the combinations of KM processes and KWS dimensions that can lead to enhanced OP.

Data were collected from 248 academics and administration employees of Higher Education Institutions (HEIs). The relationships were tested using SmartPLS 3.2.7. The study also employed fuzzy set Qualitative Comparative Analysis (fsQCA) for examining configurational paths.

The results of the study revealed that KM processes significantly affect KWS and KWS enhances OP in HEIs. Based on fsQCA, the results revealed multiple configurational paths to improved OP.

There is significant lack of research that ascertains the inter-relationship between KM processes, KWS, and OP. This is one of the initial studies that examines the relationship of KM processes, KWS, and OP in HEI’s. From a methodological perspective, the study contributes by combining symmetric and asymmetric statistical tools in KM literature. fsQCA helps to understand the interactions that might not be immediately obvious through traditional symmetric methods.

The purpose of this paper is to accurately predict the cavitation performance of a cryogenic pump and reveal the influence of the inlet pressure, the surface roughness and the flow rate on the cavitation performance.

Firstly, the Zwart cavitation model was modified by considering the thermodynamic effect. Secondly, the feasibility of the modified model was validated by the cavitation test of a hydrofoil. Thirdly, the effects of the inlet pressure, the surface roughness and the flow rate on cavitation flow in the cryogenic pump were studied by using the modified cavitation model.

The modified cavitation model can predict the cavitation performance of the cryogenic pump more accurately than the Zwart cavitation model. The thermodynamic effect inhibits cavitation development to a certain extent. The higher the vapor volume fraction, the lower the pressure and the lower the temperature. At the initial stage of the cavitation, the head increases first and then decreases with the increase of the roughness. When the cavitation develops to a certain degree, the head decreases with the increase of the roughness. With the decrease of the flow rate, the hydraulic loss increases and the cavitation at the impeller intensifies.

A cavitation model considering the thermodynamic effect is proposed. The mechanism of the influence of the roughness on the performance of the cryogenic pump is revealed from two aspects. Taking the hydraulic loss as a bridge, the relationships among flow rates, vapor volume fractions, streamlines, temperatures and pressures are established.

Drawing from self-regulation theories, this study aims to present a model linking customer mistreatment to hotel employees’ displaced workplace deviance via self-regulatory depletion, with disposition-based mindfulness as a first‐stage moderator.

The authors conducted a multisource, multiwave investigation with 245 focal–coworker dyads at 14 full-service hotels in southern China. Descriptive statistics, confirmatory factor analysis and regression analysis were performed.

The results demonstrated the mediating role of self-regulatory depletion in provoking hotel employees’ displaced deviant reactions to customer mistreatment. Additionally, employees with high trait mindfulness are less vulnerable to self-regulatory depletion and, thus, less likely to exhibit displaced workplace deviance.

This study enables hospitality administrators to understand that organizations and their employees, whether directly mistreated by customers, are potential victims of such negative events. Hospitality organizations should enhance mindfulness-based interventions and provide more humane care for employees to maintain their self-regulatory abilities, thereby reducing displaced workplace deviance.

First, in contrast to studies focusing primarily on internal factors that trigger employees’ deviant responses, the research suggests that mistreatment by external customers is a potentially meaningful yet largely unexamined antecedent of workplace deviance. Second, this study moves beyond “self-gain” explanations, suggesting that employees display deviance not because of a malicious intent to harm the organization or its members but because they are incapable of controlling their undesirable behaviors. Third, the research highlights how mindfulness mitigates customer mistreatment and displaced workplace deviance relationships.

This study aims to explore the influencing factors on college students’ behaviours of spreading Internet public opinion on emergencies in colleges and universities. This study provides a reference for these institutions to cope with and reduce the influence of Internet public opinion on emergencies and maintain their normal teaching order.

In this study, a research model by using motivation theory and design a questionnaire on the basis of relevant literature are constructed. This paper surveys college students and collects a total of 317 valid questionnaires. On the basis of the reliability and validity of the questionnaire, this study verifies the proposed model by using Smart PLS.

The results show that social motivation and information source preference have significant positive influences on college students’ willingness to spread Internet public opinion on emergencies in colleges and universities. Moreover, information source preference has a significant moderating effect on the relationship between social motivation and dissemination willingness. If college students’ information source preference is high, then the moderating effect is significant. The extent of college students’ interaction and involvement has a significantly positive influence on their trust in the dissemination platform for Internet public opinion on emergencies in colleges and universities. Egoism has a significantly positive influence on the social motivation of college students to spread Internet public opinion on emergencies in colleges and universities. Involvement degree has a significant moderating effect on the relationship between social motivation and trust. If college students’ involvement degree is low, then the moderating effect is significant. Thus, when the involvement of college students in Internet public opinion on emergencies in colleges and universities is low, the influence of social motivation on trust is great.

This study increases the influencing factors in the literature on Internet public opinion, enriches the research theory of Internet public opinion on emergencies in colleges and universities and expands the application scope of the theory of social motivation. The conclusion provides guidance for colleges and students to govern Internet public opinion on emergencies and improve the ability of these institutions in dealing with Internet public opinion on emergencies.

Constructed upon knowledge-based view, the study examines the influence of internal marketing on knowledge management processes and the indirect association of knowledge management processes with organizational performance through mediating role of knowledge worker satisfaction.

This study used a sample frame of 536 academic and administrative employees from higher education institutions in China; structural equation modeling was performed using Smart PLS 3.2.8.

The outcome reveals that internal marketing has a significant impact on knowledge management processes. The results revealed a direct insignificant impact of knowledge management processes on organizational performance; the study found full mediation of knowledge worker satisfaction on the linkage between knowledge management processes and organizational performance.

Outcomes of this research strengthen the universities’ experience of knowledge management and recommend how academics and administrators of higher education institute can value knowledge worker satisfaction, which in turn improves organizational performance.

Although, there is an increased significance of knowledge management in higher education institutions, there is a lack of research that examines the enabling factors and outcomes of knowledge management practices. The present study is one of the first studies to ascertain the relationship of internal marketing, knowledge management processes, knowledge worker satisfaction and organizational performance. This is one of the initial research studies that not only empirically examines the interrelationships among these variables but also enlightens insights into the current literature by instantaneous investigation of the mediating role of knowledge worker satisfaction.

The purpose of this paper is to extend the existing literature on entrepreneurial intentions (EIs) by employing the integrated model of personality traits and the theory of planned behavior (TPB). It further examines the mediating role of TPB’s dimensions between personality traits and EIs of final-year university students in two diverse economies: China and Pakistan.

The paper uses a survey method for data collection, administered both in electronic and paper form. The authors use structural equation modeling and the partial least square (PLS) method on a sample of 1,016 students and present PLS path modeling, mediation analysis and multigroup analysis.

Results reveal several differences regarding personality traits and TPB on EIs across the two countries. The impact of TPB was positive and significant in both countries; however, TPB demonstrated more explaining power in China’s student sample. Using three personality traits (risk-taking propensity, proactive personality and internal locus of control) as antecedents to TPB, the results reveal a stronger influence of personality traits among Chinese students. The mediation of three dimensions of TPB also revealed differences between country samples.

This is the first study of its kind to compare and contrast the differences between EIs in terms of personality and the determinants of planned behavior among university students in two diverse economies. The integrated model is original, supports both TPB and personality factors and provides a valuable perspective through its findings on two culturally diverse Asian countries. By applying the model in two different cultures, this study distinguishes the results for the two economies from those conducted in other economies.