Ping Ma, Hongli Zhang, Wenhui Fan and Cong Wang
Early fault detection of bearing plays an increasingly important role in the operation of rotating machinery. Based on the properties of early fault signal of bearing, this paper…
Abstract
Purpose
Early fault detection of bearing plays an increasingly important role in the operation of rotating machinery. Based on the properties of early fault signal of bearing, this paper aims to describe a novel hybrid early fault detection method of bearings.
Design/methodology/approach
In adaptive variational mode decomposition (AVMD), an adaptive strategy is proposed to select the optimal decomposition level K of variational mode decomposition. Then, a criterion based on envelope entropy is applied to select the optimal intrinsic mode functions (OIMF), which contains most useful fault information. Afterwards, local tangent space alignment (LTSA) is used to denoising of OIMF. The envelope spectrum of the OIMF is used to analyze the fault frequency, thereby detecting the fault. Experiments are conducted in a simulated signal and two experimental vibration signals of bearings to verify the effect of the new method.
Findings
The results show that the proposed method yields a good capability of detecting bearing fault at an early stage. The new method can extract more useful information and can reduce noise, which can provide better detection accuracy compared with the other two methods.
Originality/value
An adaptive strategy based on center frequency is proposed to select the optimal decomposition level of variational mode decomposition. Envelope entropy is used to fault feature selection. Combining the advantage of the AVMD-envelope entropy and LTSA, which suits the nature of the early fault signal. So, the proposed method has better detection accuracy, which provides a good alternative for early fault detection of bearings.
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Wenhui Fan, Huayu Xu and Xin Xu
The purpose of this paper is to formulate and simulate the model for vehicle routing problem (VRP) on a practical application in logistics distribution.
Abstract
Purpose
The purpose of this paper is to formulate and simulate the model for vehicle routing problem (VRP) on a practical application in logistics distribution.
Design/methodology/approach
Based on the real data of a distribution center in Utica, Michigan, USA, the design of VRP is modeled as a multi‐objective optimization problem which considers three objectives. The non‐dominated sorting genetic algorithm II (NSGA‐II) is adopted to solve this multi‐objective problem. On the other hand, the VRP model is simulated and an object‐oriented idea is employed to analyze the classes, functions, and attributes of all involved objects on VRP. A modularized objectification model is established on AnyLogic software, which can simulate the practical distribution process by changing parameters dynamically and randomly. The simulation model automatically controls vehicles motion by programs, and has strong expansibility. Meanwhile, the model credibility is strengthened by introducing random traffic flow to simulate practical traffic conditions.
Findings
The computational results show that the NSGA‐II algorithm is effective in solving this practical problem. Moreover, the simulation results suggest that by analyzing and controlling specific key factors of VRP, the distribution center can get useful information for vehicle scheduling and routing.
Originality/value
Multi‐objective problems are seldom considered on VRPs, yet they are of great practical value in logistics distribution. This paper is mainly focused on multi‐objective VRP which is derived from a practical distribution center. The NSGA‐II algorithm is applied in this problem and the AnyLogic software is employed as the simulation tool. In addition, this paper deals with several key factors of VRP in order to control and simulate the distribution process. The computational and simulation results regarding VRPs constitute the main contribution of our paper.
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Using Shanghai F1 as an example, this research seeks to examine the impact of mega-events on host city image from the perspective of international students. Leisure facilities and…
Abstract
Using Shanghai F1 as an example, this research seeks to examine the impact of mega-events on host city image from the perspective of international students. Leisure facilities and service were the most positive image impact perceived by the respondents, followed by affective city images as well as opportunities and convenience. International students tended to disagree that F1 would result in any crime and security problems and were unsure about any negative impact on environment and daily life. Some of the image factors were significantly related to intention to work in the city or the willingness to recommend the city.
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Wenhui Wang, Yin Zhang, Jing Han and Ping Liang
As one of the nearest and most important groups of resource guardians, local teenagers are an important force for current and especially future world heritage protection…
Abstract
Purpose
As one of the nearest and most important groups of resource guardians, local teenagers are an important force for current and especially future world heritage protection. Nurturing their awareness of world heritage protection is an important way to achieve the sustainable development of world heritage sites (WHS). The purpose of this paper is to present a case study of local teenagers of Tai’an city in China with the aim of examining how they have developed consciousness of their role as “world heritage guardians.”
Design/methodology/approach
Semi-structured interviews are used to examine the awareness of 15 local teenagers on world heritage protection. The interview results are then qualitatively analyzed by using a systematic coding process.
Findings
The analysis shows that the formation of the guardianship role is realized through three dimensions: recognition, emotion, and action, which are subjected to role awakening, role identifying, and role strengthening stage by stage. The personal experiences of the interviewees, as well as the impact from surrounding groups both serve to influence the formation of their role as “world heritage guardians.”
Research limitations/implications
The framework constructed in this study on the development of teenagers’ role consciousness cannot only apply to world heritage and environmental contexts in terms of awareness of the need for conservation, but be used toward behavioral studies of other age groups.
Practical implications
The findings can be used as a practical guide for school teachers, government officials, and heritage managers to better carry out educational programs in terms of heritage tourism and sustainable development of WHS for teenagers.
Originality/value
The teenagers’ population is underrepresented in the literature in terms of community involvement with world heritage. This study is meaningful because the focus is on improving local teenagers’ awareness of the value and importance of world heritage and their preservation.
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Yanhong Gan, Xingyu Gao, Wenhui Zhou, Siyuan Ke, Yangguang Lu and Song Zhang
The advanced technology enables retailers to develop customer profile analysis (CPA) to implement personalized pricing. However, considering the efficiency of developing CPA, the…
Abstract
Purpose
The advanced technology enables retailers to develop customer profile analysis (CPA) to implement personalized pricing. However, considering the efficiency of developing CPA, the benefit to different retailers of implementing more precise personalized pricing remains unclear. Thus, this essay aimed to investigate the impact of efficiency on participants’ strategies and profits in the supply chain.
Design/methodology/approach
A two-stage game model was introduced in the presence of a manufacturer who sets his wholesale price and a retailer that decides her CPA strategy. The equilibrium results were generated by backward induction.
Findings
Most retailers are willing to develop the highest CPA to implement perfect personalized pricing, but those inefficient retailers with high production costs would like to determine a middle CPA to implement bounded personalized pricing. The retailers’ profits may decrease with the efficiency of developing CPA when the efficiency is middle. In this case, as the efficiency improves, the manufacturer increases the wholesale price, resulting in lower demand and thus lower profits. Moreover, define a Pareto Improvement (PI) strategy as one that benefits both manufacturers and retailers. Therefore, uniform pricing is a PI when the unit cost is high and the efficiency is low; personalized pricing is a PI when the unit cost is low and the efficiency is low or high; otherwise, there is no PI.
Originality/value
This study is the first that investigates how the retailer develops CPA to implement personalized pricing on a comprehensive spectrum, which can provide practical insights for retailers with different efficiencies.
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Longzhen Ni, Liang Fang and Wenhui Chen
The aim of this study is to depict the spatial pattern of the development level of China's state-owned forest farms, thereby providing theoretical reference and empirical evidence…
Abstract
Purpose
The aim of this study is to depict the spatial pattern of the development level of China's state-owned forest farms, thereby providing theoretical reference and empirical evidence for the improvement of the corresponding development policies.
Design/methodology/approach
A development evaluation index system was established in this paper to comprehensively measure the development level of China's state-owned forest farms based on the Pressure-State-Response (PSR) model analysis framework and the actual situation of state-owned forest farms by using the entropy weight - technique for order preference by similarity to an ideal solution (entropy weight TOPSIS) evaluation method and exploratory spatial analysis method.
Findings
Studies show that the state-owned forest farms in China are generally not well developed. The pressure system that represents the input level displays an apparent restrictive effect on provinces whose comprehensive score <0.15. The response system, which represents development dynamism, has an apparent restrictive function on the provinces whose comprehensive score is 0.35. In terms of the specific spatial characteristics, the V-shape displayed by southwest–northwest and southeast–northwest has an inward trend of gradual reduction, with high-low agglomeration and low-low agglomeration correlation effects as well as apparent basin characteristics.
Originality/value
In this paper, the development level and spatial pattern of state-owned forest farms in China were accurately depicted, and the development path support and decision-making basis were provided for improving the overall development level of state-owned forest farms in China.
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Huaxiang Song, Hanjun Xia, Wenhui Wang, Yang Zhou, Wanbo Liu, Qun Liu and Jinling Liu
Vision transformers (ViT) detectors excel in processing natural images. However, when processing remote sensing images (RSIs), ViT methods generally exhibit inferior accuracy…
Abstract
Purpose
Vision transformers (ViT) detectors excel in processing natural images. However, when processing remote sensing images (RSIs), ViT methods generally exhibit inferior accuracy compared to approaches based on convolutional neural networks (CNNs). Recently, researchers have proposed various structural optimization strategies to enhance the performance of ViT detectors, but the progress has been insignificant. We contend that the frequent scarcity of RSI samples is the primary cause of this problem, and model modifications alone cannot solve it.
Design/methodology/approach
To address this, we introduce a faster RCNN-based approach, termed QAGA-Net, which significantly enhances the performance of ViT detectors in RSI recognition. Initially, we propose a novel quantitative augmentation learning (QAL) strategy to address the sparse data distribution in RSIs. This strategy is integrated as the QAL module, a plug-and-play component active exclusively during the model’s training phase. Subsequently, we enhanced the feature pyramid network (FPN) by introducing two efficient modules: a global attention (GA) module to model long-range feature dependencies and enhance multi-scale information fusion, and an efficient pooling (EP) module to optimize the model’s capability to understand both high and low frequency information. Importantly, QAGA-Net has a compact model size and achieves a balance between computational efficiency and accuracy.
Findings
We verified the performance of QAGA-Net by using two different efficient ViT models as the detector’s backbone. Extensive experiments on the NWPU-10 and DIOR20 datasets demonstrate that QAGA-Net achieves superior accuracy compared to 23 other ViT or CNN methods in the literature. Specifically, QAGA-Net shows an increase in mAP by 2.1% or 2.6% on the challenging DIOR20 dataset when compared to the top-ranked CNN or ViT detectors, respectively.
Originality/value
This paper highlights the impact of sparse data distribution on ViT detection performance. To address this, we introduce a fundamentally data-driven approach: the QAL module. Additionally, we introduced two efficient modules to enhance the performance of FPN. More importantly, our strategy has the potential to collaborate with other ViT detectors, as the proposed method does not require any structural modifications to the ViT backbone.
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Wenhui Fu, Qiang Wang and Xiande Zhao
The purpose of this paper is to systematically review the platform literature and synthesize the various topics of research into a common framework to reveal the relations between…
Abstract
Purpose
The purpose of this paper is to systematically review the platform literature and synthesize the various topics of research into a common framework to reveal the relations between platform-based service innovation, system design and other platform-related factors.
Design/methodology/approach
A quantitative descriptive analysis led to an overview of the distribution of research focuses of the 187 sample articles identified by a well-established search strategy. A qualitative in-depth review was then used to clarify the detailed research topics and generate an overall conceptual model to link them, with a focus on platform-based service innovation and system design.
Findings
In total, 11 research topics of three research perspectives were identified and linked by a framework that accounts for the relationships between platform-based service innovation and system design and their influences on platform evolution. A small panel of industry experts validated the accuracy and utility of the proposed framework.
Originality/value
This paper provides an integrated framework for separately developed research perspectives and the topics investigated in the platform literature. Through the proposed framework, this paper helps to improve the knowledge on platform study and management, and lays a foundation for exploring the research opportunities in platform-based service innovation and system design.
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Xi Chen and Mingda Zhao
With the rise of new generations of audiences, the marketing environment of theaters has undergone significant changes. The study investigates how transmedia storytelling, fan…
Abstract
Purpose
With the rise of new generations of audiences, the marketing environment of theaters has undergone significant changes. The study investigates how transmedia storytelling, fan economy and social media marketing influence new audiences’ curiosity and drive their attendance intention at theater performances.
Design/methodology/approach
This study utilized an online questionnaire, collecting 1,032 valid responses from participants predominantly aged 18–30 (62.02%). Respondents from mainland China completed measures on five main variables.
Findings
The study reveals that curiosity played a mediating role in the influence of transmedia adaptation and social media marketing on attendance. Specifically, transmedia adaptation and social media marketing both positively impact attendance through curiosity. However, idol starring does not significantly affect either curiosity or attendance.
Research limitations/implications
Limitations include potential recall bias due to a high proportion of respondents with prior theater experience and preliminary measurement scales for idol starring. Future research could explore the interactions between transmedia adaptation and social media marketing and consider cross-cultural studies.
Practical implications
The study suggests that transmedia adaptation and social media marketing can effectively attract and engage new theatergoers.
Social implications
By targeting new audiences, this research highlights how modern marketing strategies can enhance audience engagement and accessibility of performing arts in China.
Originality/value
This research provides novel insights into new audiences’ decision-making process of their first visit to the theater. It offers a unique perspective on attendance behavior, addressing gaps in understanding audience engagement in performing arts.
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The purpose of this paper is to examine the push and pull factors associated with the consumption of Chinese Table Tennis Super League (CTTSL) game events by online audiences and…
Abstract
Purpose
The purpose of this paper is to examine the push and pull factors associated with the consumption of Chinese Table Tennis Super League (CTTSL) game events by online audiences and on-site attendants.
Design/methodology/approach
Conducting a comprehensive review of literature and a test of content validity, a questionnaire was formulated to assess push and pull motives, event consumption, and sociodemographic variables. A total of 433 CTTSL event consumers, including 225 respondents who primarily followed CTTSL game events via television and webcasting and 208 respondents who primarily consumed the events by attending live game events.
Findings
Structural equation modeling analyses revealed that for online consumers, two push factors, self-esteem and drama excitement, were found to be positively related to the event consumption factors; whereas, social interaction and sport performance factors were found to be negatively predictive of event consumption factors. For on-site consumers, none of the push and pull factors were found to be related to the consumption factors.
Research limitations/implications
These results indicate that unlike research findings derived in other research settings mainly conducted in Western countries, push and pull factors are more functional for online CTTSL consumers who are of comparatively stronger fandom level, which are likely affected by CTTSL’s contemporary operations.
Originality/value
Enriching the dual process theory through examining its applicability in studying sport consumer behavior, from both perspectives of internal and external motivations; applying theories and research findings of internal and external motivations that have primarily been derived in Western countries into a professional sport setting in China; identifying unique and diverse perspectives of professional table tennis consumers in China between online and on-site consumers; contrary to the findings derived in Western countries, the motivational factors are more functional for online CTTSL consumers who are of comparatively stronger fandom level, which are likely affected by CTTSL’s contemporary operations; and conducting micro-perspective analyses to study Chinese sport consumer behaviors, which has rarely been done in contemporary scholarly inquiries in China.