Zhiqiang Zheng, Haibin Duan and Yimin Deng
The purpose of this paper is to propose a novel maximum power point track (MPPT) controller for a type of solar quad-copter to solve the problem of tracking the maximum power…
Abstract
Purpose
The purpose of this paper is to propose a novel maximum power point track (MPPT) controller for a type of solar quad-copter to solve the problem of tracking the maximum power point (MPP) when it works in nonuniform environment conditions.
Design/methodology/approach
The influence of uniform and nonuniform illumination and different temperatures results in the output characteristics of the solar array arising multiple local MPPs. To track the global MPP of the solar array on the designed solar quadcopter, a type of MPPT controller based on an improved pigeon-inspired optimization (PIO) algorithm is proposed.
Findings
A novel type of MPPT controller based on extended search PIO (ESPIO) algorithm, called ESPIO–MPPT controller, is introduced emphatically, which is used to extend the solar quadcopter’s flight time. The simulation experiments show that the ESPIO–MPPT controller can find the global MPP (GMPP) with smaller amplitudes of oscillation and less time cost.
Practical implications
The proposed solar quadcopter with ESPIO–MPPT controller has satisfactory flight performance which can greatly broaden its mission scope.
Originality/value
A type of efficient MPPT algorithm based on ESPIO is proposed for GMPP tracking of solar quadcopters in nonuniform environment conditions.
Details
Keywords
Dan Xiong, Junhao Xiao, Huimin Lu, Zhiwen Zeng, Qinghua Yu, Kaihong Huang, Xiaodong Yi and Zhiqiang Zheng
The purpose of this paper is to design intelligent robots operating in such dynamic environments like the RoboCup Middle-Size League (MSL). In the RoboCup MSL, two teams of five…
Abstract
Purpose
The purpose of this paper is to design intelligent robots operating in such dynamic environments like the RoboCup Middle-Size League (MSL). In the RoboCup MSL, two teams of five autonomous robots play on an 18- × 12-m field. Equipped with sensors and on-board computers, each robot should be able to perceive the environment, make decision and control itself to play the soccer game autonomously.
Design/methodology/approach
This paper presents the design of our soccer robots, participating in RoboCup MSL. The mechanical platform, electrical architecture and software framework are discussed separately. The mechanical platform is designed modularly, so easy maintainability is achieved; the electronic architecture is built on industrial standards using PC-based control technique, which results in high robustness and reliability during the intensive and fierce MSL games; the software is developed upon the open-source Robot Operating System (ROS); thus, the advantages of ROS such as modularity, portability and expansibility are inherited.
Findings
Based on this paper and the open-source hardware and software, the MSL robots can be re-developed easily to participate in the RoboCup MSL. The robots can also be used in other research and education fields, especially for multi-robot systems and distributed artificial intelligence. Furthermore, the main designing ideas proposed in the paper, i.e. using a modular mechanical structure, an industrial electronic system and ROS-based software, provide a common solution for designing general intelligent robots.
Originality/value
The methodology of the intelligent robot design for highly competitive and dynamic RoboCup MSL environments is proposed.
Details
Keywords
This paper aims to examine how firms respond to societal moral degradation in a transition economy from the corporate social responsibility (CSR) perspective.
Abstract
Purpose
This paper aims to examine how firms respond to societal moral degradation in a transition economy from the corporate social responsibility (CSR) perspective.
Design/methodology/approach
Based on a survey of 302 firms operating in China and using hierarchical regression, this study explores the effect of societal moral degradation on firm CSR implementation.
Findings
The study finds that the amount of CSR performed by firms in a transition market will reduce when they face increased moral degradation in the business field. The authors also find that CSR philanthropy is more significantly deterred by societal moral degradation than CSR sustainability.
Practical implications
These findings reveal that firms conducting CSR initiatives need to strategically consider the great influence of environment. Meanwhile, strategic CSR decisions should be fully aware of the different characters of different CSR forms.
Originality/value
This paper draws on the strategic choice theory and contributes to understanding of the influence of specific environmental factors in transition economies on CSR implementation. Based on two main categories of CSR, this study develops a framework that explores how firms choose different CSR forms when they encounter severe moral degradation in business sector.
Details
Keywords
Qinqin Zheng, Miao Wang and Zhiqiang Li
Practical wisdom from Chinese classical traditions is still an enlightening resource for contemporary management. Based in traditional Chinese perspectives, this paper aims to…
Abstract
Purpose
Practical wisdom from Chinese classical traditions is still an enlightening resource for contemporary management. Based in traditional Chinese perspectives, this paper aims to explore the influence of ethical leadership and social capital on customer relationship.
Design/methodology/approach
The authors conduct a survey of senior executives in 215 Chinese companies. Structural model testing and hierarchical regressions are used to analyze the data.
Findings
The empirical analysis affirms the authors' hypotheses that both ethical leadership and social capital have significant influence on customer relationship.
Research limitations/implications
The results imply that traditional Chinese perspectives on contemporary management research have a potentially important impact.
Practical implications
It may also be valuable for Chinese firms to incorporate classical traditions into their daily practice: to enhance ethical leadership and obtain more social capital.
Originality/value
This study is a modest step towards an integration of traditional perspectives into research on the role of ethical leadership, and social capital, in maintaining good customer relationship in China.
Details
Keywords
Runhui Lin, Lun Wang, Biting Li, Yanhong Lu, Zhiqiang Qi and Linyu Xie
Blockchain is a technical solution integrating multiple technologies, with the potential to overcome the drawbacks of organizational governance. Given the emergence and prevalence…
Abstract
Purpose
Blockchain is a technical solution integrating multiple technologies, with the potential to overcome the drawbacks of organizational governance. Given the emergence and prevalence of blockchain, its importance for organizational governance has progressively increased. Therefore, this study aims to analyze how blockchain restructure organizational governance.
Design/methodology/approach
This study presents a structured systematic literature review of blockchain-enabled applications across diverse organizational governance models and several case studies to illustrate them. Based on the above analysis, governance mechanisms, transaction upgrading and challenges are proposed.
Findings
Based on the literature review and typical applications, the authors summarize the advances in the research on the theoretical and practical applications of blockchain in organizational governance. We also identify the influence mechanisms of organizational governance and investigate transaction upgrading based on blockchain. Finally, the authors discuss three types of challenges (i.e. administrative, technical and environmental) to the relationship between blockchain and organizational governance. Along with the development of blockchain applications, the impact of blockchain on organizational governance has progressed in both theory and practice. Therefore, these findings will have significant implications for both academics and practitioners.
Originality/value
This paper makes three key theoretical contributions: we review the literature on the impact of blockchain on organizational governance and present typical cases to illustrate it; propose four governance mechanisms for the application of blockchain in organizational governance; and propose an innovating-and-matching-oriented model of transaction upgrading based on blockchain.
Details
Keywords
Xiaohu Zheng, Zhiqiang Liu, Qinglong An, Xibin Wang, Zongwei Xu and Ming Chen
The purpose of this paper is to investigate the cutting mechanism of drilling printed circuit board (PCB) and to optimize the drilling parameters for decreasing burr size and…
Abstract
Purpose
The purpose of this paper is to investigate the cutting mechanism of drilling printed circuit board (PCB) and to optimize the drilling parameters for decreasing burr size and thrust force.
Design/methodology/approach
An experimental study was carried out to investigate the effect of drilling parameters on thrust force and burr formation. The drilling process of PCB was divided by the variation of drilling force signals. Analysis of variance (ANVONA) was carried out for burr size and thrust force. Desirability function method was used in multiple response optimization, to find the best drilling parameters.
Findings
Enter burr and exit burr have different morphologies and types. The generation of enter burr is mainly caused by burr bending which can be observed in micrographs, whereas the generation of exit burr is more complicated than enter burr; both burr breakup and burr bending are observed in exit burrs. In the selected area, the optimized spindle speed and feed rate for drilling PCB is 12 krev/min and 6 mm/s, respectively.
Research limitations/implications
In this paper, hole wall roughness and tool wear were not considered in the optimization of drilling parameters. The future research work should consider them.
Originality/value
This paper investigates the mechanism of burr formation and thrust force in drilling PCB and then optimizes the drilling parameters to decrease the burr formation and thrust force.
Details
Keywords
Zhiqiang Jia, Weian Li and Jian Xu
The purpose of this study is to examine the impact of customers' environmental concern on corporate green innovation and its underlying mechanisms.
Abstract
Purpose
The purpose of this study is to examine the impact of customers' environmental concern on corporate green innovation and its underlying mechanisms.
Design/methodology/approach
This study empirically examines the impact of customer environmental concern on corporate green innovation using 967 company-customer-year observations of Chinese A-share listed companies over the period 2012–2022.
Findings
The empirical results show that customer environmental concern significantly enhances corporate green innovation. Furthermore, executive environmental awareness and research and development (R&D) investment play a partial mediating role in this relationship. The heterogeneity analysis reveals that state-owned customers, customers located in the same province with the corporate and the intellectual property model cities contribute to strengthening this relationship. Moreover, corporate performance analysis shows that customer environmental concern can significantly increase corporate financial performance and sustainable performance.
Originality/value
This study innovatively proposes a measure of customer environmental concern and examines its impact on corporate green innovation and its underlying mechanisms. In addition, this study also proposes some insights for policymakers.
Details
Keywords
Xinmin Tian, Zhiqiang Zhang, Cheng Zhang and Mingyu Gao
Considering the role of analysts in disseminating information, the paper explains the idiosyncratic volatility puzzle of China's stock market. As the largest developing country…
Abstract
Purpose
Considering the role of analysts in disseminating information, the paper explains the idiosyncratic volatility puzzle of China's stock market. As the largest developing country, China's research can provide meaningful reference for the research of financial markets in other new countries.
Design/methodology/approach
From the perspective of behavior, establishing a direct link between individual investor attention and stock price overvaluation.
Findings
The authors find that there is a significant idiosyncratic volatility puzzle in China's stock market. Due to the role of mispricing, individual investor attention significantly enhances the idiosyncratic volatility effect, that is, as individual investor attention increases, the greater the idiosyncratic volatility, the lower the expected return. Attention can explain the idiosyncratic volatility puzzle in China's stock market. In addition, due to the role of information production and dissemination, securities analysts can reduce the degree of market information asymmetry and enhance the transparency of market information.
Originality/value
China is the second largest economy in the world, and few scholars analyze it from the perspective of investors' attention. The authors believe this paper has the potential in contributing to the academia.
Details
Keywords
Qi Yang, ZhiQiang Feng, RuanBing Zhang, YunPu Wang, DengLe Duan, Qin Wang, XiaoYu Zou and YuHuan Liu
This study aims to develop a green, economical and efficient ultrasonic-/microwave assisted extraction (UMAE) process for the extraction of anthocyanins.
Abstract
Purpose
This study aims to develop a green, economical and efficient ultrasonic-/microwave assisted extraction (UMAE) process for the extraction of anthocyanins.
Design/methodology/approach
After optimizing the extraction conditions by response surface methodology, three assays including DPPH, ABTS·+, FRAP were applied to analyze the antioxidant activity of the extracted anthocyanins. The stability under different temperatures, reductant concentrations and pHs was also discussed. The components of anthocyanins in blueberry were analyzed by HPLC-QTOF-MS2.
Findings
The optimal extraction parameters were ultrasonic power of 300 W, microwave power of 365.28 W and solid–liquid ratio of 30 (g/mL). The possible structures can be speculated as Delphinidin-3-O-galactoside, Delphinidin, Petunidin, Delphinidin-3-O-glucoside, Petunidin-3-O-glucoside, Cyanidin-3-O-glucoside. The results demonstrated that the UMAE can improve the yield of anthocyanins in shorter extraction time with higher activity.
Originality/value
The present study may provide a promising and feasible route for extracting anthocyanins from blueberries and studying their physicochemical properties, ultimately promoting the utilization of blueberry anthocyanins.
Details
Keywords
Xi Ouyang, Zhiqiang Liu and Chenglin Gui
Underpinned by the ability–motivation–opportunity framework, this paper aims to establish a framework of employee creativity antecedents in the hospitality and tourism industries…
Abstract
Purpose
Underpinned by the ability–motivation–opportunity framework, this paper aims to establish a framework of employee creativity antecedents in the hospitality and tourism industries and meta-analytically examine the magnitude of effect sizes as well as the moderating effects of cultural factors.
Design/methodology/approach
A meta-analysis using data from 82 independent studies was conducted to explore the hypothesized relationships and verify how they were contingent on uncertainty avoidance and long-term orientation.
Findings
The results supported the majority of hypotheses about the relationships between antecedents and creativity. Furthermore, they showed that the effects of intrinsic motivation, positive affect and climate for innovation on creativity in the hospitality and tourism industries were significantly larger than those reported in previous meta-analyses. It also showed that uncertainty avoidance and long-term orientation could buffer or strengthen some associations.
Practical implications
This study generates some essential managerial suggestions for organizations in need of innovation. Managers can learn from the results so as to effectively promote the ability, motivation and opportunity for creativity and merge cultural elements with innovation strategy when they operate globally.
Originality/value
This study provides a theory-based explanation for how employee creativity can be activated. To the best of the authors’ knowledge, this study is a first attempt to meta-analytically test the underlying determinants of employee creativity in the hospitality and tourism industries. Additionally, the search for boundary conditions of the proposed relationships is likely to reconcile existing conflicts and inspire future studies.