Search results

This paper aims to investigate the effects of air inlet flow rate on the bearing cavity and operating conditions during the oil-air lubrication.

A model of oil-air lubrication of rolling bearings is established using computational fluid dynamics numerical simulation. Moreover, temperature and vibration experiments are carried out for comparisons and validation.

Results suggest that the velocity and pressure distributions of the oil-air flow inside the chamber are not uniform. Moreover, the uniform decreases with increasing air inlet flow rate. The non-uniform oil distribution inside the bearing significantly influences the bearing temperature rise and lubrication effect. Furthermore, the decrease in pressure uniformity enhances the vibration intensity and increases the amplitude of the vibration acceleration by more than 40 per cent. Increasing the air inlet flow rate improves lubrication and cooling efficiency but produces intense vibrations.

A method of establishing rolling bearings model under oil-air lubrication is presented in the paper. The effect of air inlet flow rate on flow uniform under oil-air lubrication has been researched insightfully. The results provide a useful reference to improve the oil-air lubrication system and enhance the operational stability of the motorized spindle.

This paper aims to relate Taoist Yin‐Yang thinking to Western nomology in terms of trust and trust building, seeking to explore the question of how trust impacts on conflict management.

A moderating model of trust in conflict management is proposed. Investigations and observations using primary and secondary data are described. Three cases are presented to explain the moderating effects of adjusting activities and trust on conflict and negotiation.

The proposed model was supported. The following findings have been obtained: keeping a balance between adjusting others and adjusting self is a key to resolving conflict; creating and retaining harmony is a bridge that leads both sides in conflict and negotiation to adjust themselves; taking indirect actions through relationships instead of by direct actions through power is a good way to trigger a state of harmony; and trust is shown to be the original driver and source that contribute to adapting actions, harmony and eventually to a win‐win negotiation outcome.

The investigations were limited in time and scope and consequently not conclusive.

This research may provide practical implictions for people and organizations interested in conflict resolution who wish to: take a position that values trust; take indirect actions through relationship instead of direct actions through power; create and retain harmony between both sides in conflict and negotiation; and keep a balance between adjusting others and adjusting self, so to achieve win‐win negotiation outcomes.

This research may enhance the understanding of Taoist Yin‐Yang thinking by linking it with the Western nomology.

Digitalization encourages the manufacturer to engage in inter-organizational technological activities (i.e. supplier IT integration and supply visibility) with its major supplier, which influences supply chain (SC) governance. This study tests a moderated mediation model that considers supplier IT integration and supply visibility as mediators between supply-side digitalization and supplier opportunism, and relational ties as a moderator in the relationship between inter-organizational technological activities and supplier opportunism.

Ordinary least square (OLS) regression is used to examine data from 200 firms in China describing their supply chain management (SCM) practices and perceived relationships with their major suppliers.

Supply-side digitalization is positively related to supplier IT integration and supply visibility. Supply-side digitalization has a positive indirect effect on supplier opportunism through supplier IT integration but a negative indirect effect through supply visibility. Relational ties weaken the positive effect of supplier IT integration and the positive indirect effect of supply-side digitalization on supplier opportunism. Relational ties also weaken the negative effect of supply visibility and the negative indirect effect of supply-side digitalization on supplier opportunism.

This study enriches understanding of SC governance in the digital age by empirically confirming that digital transformation brings both challenges and opportunities to SC governance and by clarifying the interplay of relational governance and technological activities. In addition, this study contributes to the SC digitalization literature by empirically validating the role of digitalization in promoting inter-organizational technological activities, as well as by revealing its potential dark side.

The purpose of this paper is to explore the impact of green supply chain integration (GSCI) on sustainable performance which includes environmental, social and economic performance.

Based on data collected from 206 Chinese manufacturers, this study uses structural equation modeling with the maximum-likelihood estimation method to test the theoretical model.

The results show that different dimensions of GSCI have different outcomes. Green internal integration lays the foundation for green supplier integration (GSI) and green customer integration (GCI), and is related to both environmental and social performance. GSI is positively related to economic performance, whereas GCI is positively related to social performance.

Believing that “how to be green” matters, this study focuses on an integrative approach to green supply chain management (GSCM), shedding new light on how GSCI influences performance and providing practical guidelines for different stakeholders.

This paper aims to demonstrate the principle and practical applications of hyperspectral object detection, carry out the problem we now face and the possible solution. Also some challenges in this field are discussed.

First, the paper summarized the current research status of the hyperspectral techniques. Then, the paper demonstrated the development of underwater hyperspectral techniques from three major aspects, which are UHI preprocess, unmixing and applications. Finally, the paper presents a conclusion of applications of hyperspectral imaging and future research directions.

Various methods and scenarios for underwater object detection with hyperspectral imaging are compared, which include preprocessing, unmixing and classification. A summary is made to demonstrate the application scope and results of different methods, which may play an important role in the application of underwater hyperspectral object detection in the future.

This paper introduced several methods of hyperspectral image process, give out the conclusion of the advantages and disadvantages of each method, then demonstrated the challenges we face and the possible way to deal with them.

This paper aims to study the encounter issues of the Tethered-Space Net Robot System (TSNRS) with non-target objects on orbit during the maneuver, including the collision issues with small space debris and the obstacle avoidance from large obstacles.

For the collision of TSNRS with small debris, the available collision model of the tethered net and its limitation is discussed, and the collision detection method is improved. Then the dynamic response of TSNRS is studied and a closed-loop controller is designed. For the obstacle avoidance, the variable enveloping circle of the TSNRS has coupled with the artificial potential field (APF) method. In addition, the APF is improved with a local trajectory correction method to avoid the overbending segment of the trajectory.

The collision model coupled with the improved collision detection method solves the detection failure and speeds up calculation efficiency by 12 times. Collisions of TSNRS with small debris make the local thread stretch and deforms finally making the net a mess. The boundary of the disturbance is obtained by a series of collision tests, and the designed controller not only achieved the tracking control of the TSNRS but also suppressed the disturbance of the net.

This paper fills the gap in the research on the collision of the tethered net with small debris and makes the collision model more general and efficient by improving the collision detection method. And the coupled obstacle avoidance method makes the process of obstacle avoidance safer and smoother.

The work in this paper provides a reference for the on-orbit application of TSNRS in the active space debris removal mission.

This study addresses an important research question regarding how supplier-base concentration affects buyer efficiency. Drawing on the contradicting views of transaction cost theory (TCT) and resource dependence theory (RDT), the authors explore the main effect of supplier-base concentration on buyer efficiency and how this effect is contingent on buyers' characteristics (i.e. research and development (R&D) expenditure and market share).

Based on data collected from the Chinese manufacturing firms listed on National Equities Exchange and Quotations (NEEQ) between 2015 and 2019, the authors use a fixed-effect model as well as a two-stage least squares model to test the predictions.

The authors find that supplier-base concentration has a positive effect on buyer efficiency. In addition, when a buyer has higher levels of R&D expenditure and market share, the positive relationship between supplier-base concentration and buyer efficiency is strengthened.

This study contributes to a better understanding of the effect of supplier-base concentration. First, the authors provide theoretical and empirical evidence of the positive effect of supplier-base concentration on buyer efficiency. Second, the authors reveal the underlying mechanism of how to counter the potential drawbacks and benefit more from supply base reduction by introducing R&D expenditure and market share as contingencies.

Facilitating supply chain visibility and traceability through effective information sharing is vital to improve the quality and safety of food products. However, we know little about the enablers of information sharing in food supply chains. Drawing upon resource dependence theory and social exchange theory, the purpose of this paper is to explore how farmers’ dependence on companies influences their trust in and relationship commitment to those companies, and in turn facilitates effective information sharing with them.

Data collected from 462 farmers in China were used to test the conceptual model and related hypotheses.

The results show that dependence has a significant positive effect on trust and relationship commitment, but it has no direct significant effect on information sharing. In addition, trust has a significantly positive influence on relationship commitment, and both trust and relationship commitment have significantly positive effects on information sharing. These findings show that strengthening farmers’ dependence on companies can cultivate farmers’ trust and relationship commitment, thereby encouraging them to share information with the companies.

Theoretically, this study contributes to the supply chain information sharing and relationship management literature. Practically, it shows how companies can effectively monitor production processes and improve food quality and safety through information sharing and relationship management.

This paper aims to investigate the antecedents of supply chain information integration (SCII) and their consequences on company performance from the perspective of resource-based view (RBV).

Based on empirical survey data collected from 202 Australian manufacturers, this study examines the effects of strategic supply chain relationship (SCR) and supply chain technology (SCT) internalization on external and internal information integration (II) and the effects of external and internal II on operational (operational efficiency and service quality) and financial performance. Structural equation modeling and the maximum-likelihood estimation methods are used to test the proposed relationships.

The results indicate that both strategic SCR and SCT internalization are positively related to external and internal II. Moreover, strategic SCR has a stronger positive relationship with external II than with internal II, and SCT internalization has a stronger positive relationship with internal II than with external II. Internal II is positively related only to service quality, and external II is positively related only to operational efficiency. Both operational efficiency and service quality are positively related to financial performance.

This study contributes to the SCII literature and provides significant managerial implications for manufacturers to leverage their supply chain resources and capabilities by establishing a resources-capabilities-performance framework for the antecedents and consequences of SCII.

Three-parameter interval grey numbers (TPIGNs) have been extensively studied as an extended form of interval numbers. However, most existing TPIGN multi-attribute decision-making methods only consider the similarity of positions, ignore the similarity of developmental directions and focus primarily on static evaluation. To address these limitations, in this study, the authors propose a dynamic technique for order preference by similarity to an ideal solution (TOPSIS) based on modified Jaccard similarity and angle similarity for TPIGNs.

First, the authors extend Jaccard similarity to a TPIGN environment to represent positional similarity. A simple example is provided to illustrate the limitations of the traditional Jaccard similarity. Then, the authors introduce an angle similarity measure to represent developmental directional similarity. Finally, a dynamic TOPSIS model is constructed by incorporating time-series data into conventional two-dimensional static data. Stage weights are obtained by an objective function designed to maximize the amount and minimize the fluctuation of decision information. A quadratic weighting method is adopted to derive the overall evaluation value of alternatives.

To evaluate the effectiveness of the proposed method, this study takes the pre-assessment of ice disaster and the selection of cooperative enterprises as examples. The authors then provide the results of comparative and sensitivity analyses, which demonstrate the effectiveness and flexibility of the proposed method.

The proposed TOPSIS method in a TPIGN environment can take a more holistic and dynamic perspective for decision-making, which helps mitigate the limitations of single-perspective or static evaluations.