This paper aims to propose a spoke-type fractional-slot concentrated windings (FSCW) PM machine for EVs driving system to improve torque density. To further improve…
Abstract
Purpose
This paper aims to propose a spoke-type fractional-slot concentrated windings (FSCW) PM machine for EVs driving system to improve torque density. To further improve electromagnetic performance, the multi-objective optimization design is processed based on response surface (RS) model and simulated annealing cuckoo search (SA-CS) algorithm.
Design/methodology/approach
The spoke-type FSCW PM machine is designed and optimized to meet the requirement of EVs driving system. First, a spoke-type FSCW PM machine is designed and some of key parameters are obtained based on equivalent magnetic circuit (EMC) method. Then, the RS model and modified SA-CS algorithm are proposed to obtain higher torque, lower torque ripple and higher efficiency.
Findings
After verification by finite element method for no-load and load performance, the optimal machine has higher torque density, lower torque ripple and higher efficiency compared with initial machine. Finally, a 20 kW prototype is manufactured and tested to verify the validity of the proposed optimization design method.
Originality/value
This paper designs a high torque density spoke-type FSCW PM machine, which is superior for EVs driving system. Meanwhile, a novel modified SA-CS algorithm is applied to the field of electrical machine multi-objective optimal design.
Details
Keywords
Jinlin Huang, Zhangming Li and Guihe Tang
Catastrophe theory can directly deal with discontinuity without any connection with the special inner mechanism, which makes it suitable for system research, whose inner action is…
Abstract
Purpose
Catastrophe theory can directly deal with discontinuity without any connection with the special inner mechanism, which makes it suitable for system research, whose inner action is unknown but outer one can be observed. There are many inner factors, which affect the bearing capacity of pile, it is different to ascertain bearing capacity of pile. The purpose of this paper is to present a new calculation method of bearing capacity of pile by the catastrophe theory.
Design/methodology/approach
The cusp model of catastrophe theory and its expression are discussed in this paper. By means of mechanical model analysis, bearing capacity of pile is systematically studied coupling catastrophe steady mechanism with equilibrium conditions of single pile. The settlement of top pile is transformed into the normal form of cusp catastrophe. The relationship between the settlement of top pile and vertical bearing capability of pile is built.
Findings
Vertical bearing capacity of single pile was deduced by means of energy principle and catastrophe theory based on settlement of critical instability of pile.
Research limitations/implications
Accessibility and availability of the constitutive equation of concrete of pile and parameter are the main limitations which model will be applied.
Practical implications
A very useful reference for design processes engineers.
Originality/value
The estimated results of the example correspond to one of practical experience, which provides a basis for design of vertical bearing capacity of single pile.
Details
Keywords
Aihui Chen, Jinlin Wan and Yaobin Lu
A rash of security incidents in ride-sharing have made discovering the mechanisms to repair consumers' trust essential for the information technology (IT)-enabled ride-sharing…
Abstract
Purpose
A rash of security incidents in ride-sharing have made discovering the mechanisms to repair consumers' trust essential for the information technology (IT)-enabled ride-sharing platforms. The purpose of this paper is to explore how the two response strategies (i.e. security policies [SPs] and apologies) of platforms repair passengers' trust and whether the two implementation approaches of SPs (i.e. pull and push) lead to different results in repairing passengers' trust in the platforms.
Design/methodology/approach
A field survey based on a real scenario (n = 238) and an experiment (n = 245) were conducted to test the hypotheses empirically. Structural equation modeling and one-way analysis of variance (ANOVA) are employed in the data analyses.
Findings
This study finds that (1) both SPs and apologies aid in repairing trust; (2) repaired trust fully mediates the influence of SPs on continuance usage and partially mediates the influence of apologies on continuance usage; (3) security polices and the three dimensions of apologies play different roles in repairing trust and retaining passengers and (4) both pull-based and push-based SPs can repair the violated trust; however, the effect of the pull approach is greater than that of the push approach.
Practical implications
The findings provide guidelines for ride-sharing platforms in taking appropriate actions to repair users' trust after security incidents.
Originality/value
The findings reveal the mechanism of trust repairing in the fields of ride-sharing and extend the contents of the trust theory and pull–push theory.
Details
Keywords
Since our reform and open policy has been adopted, our exhibition industry has increased rapidly. Exhibitions are unique amongst new and established media in enabling customers…
Abstract
Since our reform and open policy has been adopted, our exhibition industry has increased rapidly. Exhibitions are unique amongst new and established media in enabling customers, prospects and industry colleagues to meet face to face. With the development of network economy, e‐commerce plays a major role on new economy stage. Undoubtedly, it will work on exhibition industry. This paper probes into how to combine e‐commerce with the exhibition industry effectively with particular reference to PR China.
Details
Keywords
Currently, there is a conflict in developing countries between the requirements for the self-development of forestry and the insufficient investment in the forestry sector, and…
Abstract
Purpose
Currently, there is a conflict in developing countries between the requirements for the self-development of forestry and the insufficient investment in the forestry sector, and the forest ticket system is an innovative forestry management method to solve this contradiction. In the research on the forest ticket system, the study of its price formation mechanism is relatively important. The key issues of the forest ticket system are how to form the forest ticket price and whether the forest ticket pricing methods are reasonable. Solving these problems is the purpose of this study.
Design/methodology/approach
This study will use three methods, namely the forest ecosystem service value evaluation index method, the ecosystem service value based on per unit area evaluation method and the contingent valuation method, to study the forest ticket price formation mechanism, filling the gap in the current research on forest ticket pricing methods. It will analyze how these three pricing methods specifically price the forest ticket and evaluate whether these pricing methods are reasonable. This study will then summarize and comprehensively study the forest ticket price formation mechanism and provide policy recommendations for decision-making departments.
Findings
The contingent valuation method and the forest ecosystem service value evaluation index method should be mainly used and given priority in the forest ticket pricing process. When the forest ticket is mainly issued for local residents' willingness to compensate for the forestry ecological value, the contingent valuation method should be mainly considered; when the forest ticket is mainly issued for compensating for the ecological value of local used forest land, the forest ecosystem service value evaluation index method should be mainly considered. The ecosystem service value based on per unit area evaluation method does not need to be the focus.
Originality/value
Compared with existing research studies, which focus more on the forest ticket system itself and the definition of forest ticket, this study mainly focuses on the forest ticket price formation mechanism, emphasizing how to form the forest ticket price and whether the forest ticket pricing methods are reasonable, which has a certain degree of innovation and research value and can partially fill the gap in related fields. At the same time, this study has certain help for the enrichment of the forest ticket system and the extension of related research studies.
Details
Keywords
Woojin Lee, HeeKyung Sung, Eunju Suh and Jinlin Zhao
The purpose of this study was first to examine how goal-oriented attendees and experiential-oriented attendees were related with their overall satisfaction and loyalty of the…
Abstract
Purpose
The purpose of this study was first to examine how goal-oriented attendees and experiential-oriented attendees were related with their overall satisfaction and loyalty of the destination with respect to international food and wine festival. It also investigated how these relations are mediated by different dimension of experiential consumption values such as consumer return on investment (CROI, active value), escapism (active value) and service excellence (reactive value) and aesthetics (reactive value).
Design/methodology/approach
Self-administered questionnaires were distributed to and collected from attendees at the 2011 Food Network South Beach Wine and Food Festival in Miami, Florida. A total of 450 subjects were collected from attendees indicating a response rate of about 88 per cent. Total 13 hypotheses were tested using structural equation model (SEM) with AMOS, and the results were interpreted adapting Mathwick’s (2001) typology of experiential value.
Findings
The findings indicate that goal-oriented attendees had stronger relationship with reactive experiential values such as service excellence and aesthetics than active values, whereas experiential-oriented attendees had more significant relations with active experiential values such as CROI and escapism than reactive values. In addition, CROI, escapism and service excellence were found to have a positive influence on the overall satisfaction with the festival; in turn, the attendees’ satisfaction had a positive effect on their intention to revisit the destination. Further, the results demonstrated that all experiential values, including CROI and escapism (active values), and service excellence and aesthetics (reactive values), played a mediating role between goal-oriented/experientially oriented attendee and satisfaction with the festival.
Practical implications
The festival organizers and managers should understand what drives the attendees’ participation in the festival. Implementing experiential marketing through various dimensions of experiential value can attract more potential attendees, provide unique experiences and create favorable perception toward the destination.
Originality/value
The research is original in terms of conceptualizing and empirically testing the relation between experiential consumption values and behavior loyalty within the special events and festivals with a specific focus on international food and wine festival. A finding of particular importance here is verifying the unique characteristics of goal-/experiential-oriented attendees in festival settings and determining the linkages between these different attendees and active/reactive experiential values, not to mention the relation with the overall satisfaction and loyalty to the festival destination.
Details
Keywords
Lan Lu and Jinlin Zhao
This paper aims to contribute to the literature investigating hotel customers’ preventive behavior during the COVID-19. Because there is no timely research discussing cleaning and…
Abstract
Purpose
This paper aims to contribute to the literature investigating hotel customers’ preventive behavior during the COVID-19. Because there is no timely research discussing cleaning and disinfection services as a premium service in China, the authors conducted research to examine customers’ perceptions based on the information–motivation–behavioral skills (IMB) model and to explore potential marketing exits. Moreover, based on the price-sensitive measurement, this study reveals the price range and optimal price of the service, which could assess the feasibility of the service and balance the operation cost.
Design/methodology/approach
An internet-based, self-reported survey was designed to collect the data during the outbreak of COVID-19 in April 2020. The yield was 874 usable and valid responses, which were purposefully analyzed using confirmatory factor analysis and structural equation modeling.
Findings
The results indicate a significant influence of dimensions (information, motivation, health behavior skills) on hotel customers’ preventive behavior regarding purchase intention of cleaning and disinfection service. The optimal price of this service is 20% of the average room rate, and the range of acceptable prices is 15% of the average room rate.
Originality/value
The present study represents academic attempts to contribute to the literature by applying the IMB model to consumer behavior in a hotel industry context, emphasizing the importance of each dimension in behavioral intention during the current ongoing global issue. Additionally, the results indicate that the hotel industry could consider satisfying the needs of this market based on the suggested price.
Details
Keywords
Jinlin Gong, Bassel Aslan, Frédéric Gillon and Eric Semail
The purpose of this paper is to apply some surrogate-assisted optimization techniques in order to improve the performances of a five-phase permanent magnet machine in the context…
Abstract
Purpose
The purpose of this paper is to apply some surrogate-assisted optimization techniques in order to improve the performances of a five-phase permanent magnet machine in the context of a complex model requiring computation time.
Design/methodology/approach
An optimal control of four independent currents is proposed in order to minimize the total losses with the respect of functioning constraints. Moreover, some geometrical parameters are added to the optimization process allowing a co-design between control and dimensioning.
Findings
The optimization results prove the remarkable effect of using the freedom degree offered by a five-phase structure on iron and magnets losses. The performances of the five-phase machine with concentrated windings are notably improved at high speed (16,000 rpm).
Originality/value
The effectiveness of the method allows solving the challenge which consists in taking into account inside the control strategy the eddy-current losses in magnets and iron. In fact, magnet losses are a critical point to protect the machine from demagnetization in flux-weakening region.
Details
Keywords
Jinlin Wan, Yaobin Lu and Sumeet Gupta
Dashang refers to a reward given voluntarily to street performers in return for their performance. Some social media platforms have created a way to integrate this as a function…
Abstract
Purpose
Dashang refers to a reward given voluntarily to street performers in return for their performance. Some social media platforms have created a way to integrate this as a function, referred to as the dashang feature, to allow users to reward live performers online as well. Over the last few years, this function has become extremely popular among social media users, as it recreates the nostalgic experience of watching street performances. Platforms now consider it indispensable, as it has become a source of substantial revenue (commission on rewards earned by performers). However, not all users reward performers. For each user who pays, there are many more who lurk on the platform. This study examines the reasons for these differences using the Big Five personality perspective and justice theory.
Design/methodology/approach
We develop an empirical model using the Big Five theory and justice theory and test it using empirical data collected through a survey of WeChat users.
Findings
The results indicate that distributive justice, interpersonal justice and informational justice are essential factors in relation to social media users' use of the dashang feature. It is also found that personality type affects these three factors.
Originality/value
This study makes three key contributions. First, it examines the factors that influence users' voluntary use of the dashang feature using the lenses of the Big Five theory and justice theory. Second, this study extends previous results on perceived justice to examine use of the dashang feature in social media. Third, this study applies these theories to the study of consumer behavior by exploring the role of user characteristics in social media use.