Ya'nan Lou, Pengkun Quan, Haoyu Lin, Zhuo Liang, Dongbo Wei and Shichun Di
This purpose of this paper is to design a peg-in-hole controller for a cable-driven serial robot with compliant wrist (CDSR-CW) using cable tensions and joint positions. The peg…
Abstract
Purpose
This purpose of this paper is to design a peg-in-hole controller for a cable-driven serial robot with compliant wrist (CDSR-CW) using cable tensions and joint positions. The peg is connected to the robot link through a CW. It is required that the controller does not rely on any external sensors such as 6-axis wrist force/torque (F/T) sensor, and only the compliance matrix’s estimated value of the CW is known.
Design/methodology/approach
First, the peg-in-hole assembly system based on a CDSR-CW is analyzed. Second, a characterization algorithm using micro cable tensions and joint positions to express the elastic F/T at the CW is established. Next, under the premise of only knowing the compliance matrix’s estimate, a peg-in-hole controller based on force/position hybrid control is proposed.
Findings
The experiment results show that the plug contact F/T can be tracked well. This verifies the validity and correctness of the characterization algorithm and peg-in-hole controller for CDSR-CWs in this paper.
Originality/value
First, to the authors’ knowledge, there is no relevant work about the peg-in-hole assembly task using a CDSR-CW. Besides, the proposed characterization algorithm for the elastic F/T makes the peg-in-hole controller get rid of the dependence on the F/T sensor, which expands the application scenarios of the peg-in-hole controller. Finally, the controller does not require an accurate compliance matrix, which also increases its applicability.
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Bin Xi and Pengyue Zhai
The purpose of this study is to explore the impact of environmental pollution and industrial structure upgrading on environmental pollution in different stages based on the…
Abstract
Purpose
The purpose of this study is to explore the impact of environmental pollution and industrial structure upgrading on environmental pollution in different stages based on the temporal and spatial heterogeneity of economic development level and industrial structure upgrading level in eastern, central and western regions of China and discuss whether there is adjustment effect and threshold effect in the process of economic growth affecting environmental pollution, and finally realizes sustainable economic development.
Design/methodology/approach
Based on panel data from 30 provincial-level administrative regions of China (excluding Tibet and Hong Kong, Macao and Taiwan) from 2000 to 2019, this paper uses the environmental Kuznets curve, regulating effect model and panel threshold model to analyze the impact of economic growth and industrial structure upgrading on environmental pollution.
Findings
The results present that the uneven distribution of natural resources leads to different levels of economic development and industrial structure upgrading in eastern and western regions, and its impact on environmental pollution is also different. Economic growth and industrial structure upgrading have a positive effect on environmental pollution, and the relationship between economic growth and environmental pollution is inverted U-shaped. At present, the eastern, central and western regions of China are at the right end of the inverted U-shaped relationship. In general, industrial structure upgrading in eastern, central and western regions has a significant inhibitory effect on environmental pollution. Industrial structure upgrading has a negative moderating effect on the relationship between economic growth and environmental pollution, and the regulating effect is most significant in the central region, followed by the eastern region, and not significant in the western region. The results of panel threshold model show that the industrial structure upgrading can slow down the positive impact of economic growth on environmental pollution and strengthen the negative moderating effect of industrial structure upgrading on economic growth and environmental pollution.
Originality/value
The innovation of this study is to bring economic growth, industrial structure upgrading and environmental pollution into a unified analytical framework, analyze the impact of economic development and industrial structure upgrading levels in different periods on environmental pollution, and select industrial structure upgrading as the moderating variable and threshold variable. It provides a thought for the influence mechanism of different levels of industrial structure upgrading on economic growth and environmental pollution. Based on the panel data in China, this study emphasizes the concept of sustainable development, adheres to green development and proposes relevant policies to improve environmental pollution. And this paper proposes relevant policies to improve environmental pollution from the perspective of transforming economic growth mode and optimizing industrial structure in China, which also has reference significance for developing countries to realize sustainable economic development.
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Low Sui Pheng and Ben Lee Siew Keong
A review of existing management literature reveals that most of the literature is written entirely from a Western perspective without any references to practices in the East. In…
Abstract
A review of existing management literature reveals that most of the literature is written entirely from a Western perspective without any references to practices in the East. In the fast‐growing construction market of China, managers from the West need to pay special attention to Eastern beliefs, cultures and management practices, including those passed down by prominent ancient Chinese sages. Zhuge Liang was an outstanding statesman and military scientist who lived around the period of the Three Kingdoms (ad 220‐289). He studied the Chinese classics and became talented and knowledgeable, rich in his thoughts and subtle in analysing critical political situations. The objectives of this paper are to explain Zhuge Liang′s Art of Management and by implications, provide some insights as to how effective construction project management can be developed through a better understanding of Zhuge Liang′s Art of Management.
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Low Sui Pheng and Ben S.K. Lee
States that much of the existing management literature was written entirely from a Western perspective without any reference to practices in the East. Explains that, in the…
Abstract
States that much of the existing management literature was written entirely from a Western perspective without any reference to practices in the East. Explains that, in the booming East Asian market, project managers from the West would need to pay special attention to Oriental beliefs, cultures and philosophies. Attempts, for the purpose of integration, to put together the managerial grid framework from the West with an ancient Chinese strategic treatise written by Zhuge Liang 1,600 years ago. Suggests that there are many similarities between the “Managerial grid” and Zhuge Liang’s “Art of management” when used to resolve problems related to project management.
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Qian Zhou, Shuxiang Wang, Liya Wang and Wei Xu
Open innovation platform has become an effective field through which enterprises can acquire valuable knowledge for incremental and breakthrough innovation. However, as more…
Abstract
Purpose
Open innovation platform has become an effective field through which enterprises can acquire valuable knowledge for incremental and breakthrough innovation. However, as more entities join the innovation platform, the knowledge activities in the platform ecosystem are now facing higher complexity and vulnerability due to the differences in the knowledge demands as well as conflicting interest claims of participants. The lack of mature governance mechanisms has caused opportunistic behaviors like knowledge infringement, leakage and hiding, which seriously hinder the in-depth knowledge sharing and effective utilization. What’s more, the enthusiasm for collaborative innovation also reduced among multi-subjects. Therefore, the purpose of this study is to improve platform participants’ innovation ambidexterity under the guidance of scientific design of platform knowledge governance mechanisms through improved knowledge transformation processes.
Design/methodology/approach
Therefore, based on knowledge governance theory and knowledge transformation model (SECI, socialization-externalization-combination-internalization), the study explored the influence of relationship and contractual knowledge governance on the innovation ambidexterity of platform participants through the mediation effect of knowledge transformation. To better analyze complex causal relationships among variables and the chain multiple mediation effect, structural equation modeling is used, coupled with bootstrap analysis verification.
Findings
Platform contractual governance and relationship governance can positively influence the innovation ambidexterity of participants through knowledge trading and reuse, as well as through knowledge sharing and creation. The findings not only contribute to optimizing the effectiveness of knowledge activities on digital platforms but also provide empirical evidence and practical insights to support enterprises’ incremental and breakthrough innovation according to their own knowledge bases.
Practical implications
The findings offer valuable insights for providing decision-making guidance not only for platform-leading enterprises but also for individual and enterprise users on effectively using open innovation platforms to conduct knowledge seeking, trading or sharing and knowledge reuse or creation to enlarge the incremental innovation value and to trigger breakthrough innovation value in their product and technology developments.
Social implications
Through diverse knowledge governance mechanisms, platform-leading enterprises do not only act as “economic agents” with private attributes to reduce knowledge asymmetry in the public trading market, diffuse knowledge broadly and mitigate cooperation costs to increase economic value; they also serve as “social actors” for multilateral participants to increase the cohesion of knowledge sharing and creation to provide sustainable knowledge fuel for the higher level of breakthrough innovation. Overall, knowledge arrangement efficiency can be optimized, and breakthrough innovation value can be activated in a well-governed platform, gradually escaping the diminishing marginal benefits of exploitative innovation.
Originality/value
This study has extended the views of the knowledge transformation model under the platform context and proposed dualistic knowledge transformation pathways, named “tacit knowledge socialization” and “explicit knowledge combination,” respectively. Besides, it discovered that under the contractual and relationship knowledge governance mechanisms’ guiding, participants in open innovation platforms may choose different knowledge searching and exchange ways according to their knowledge needs and thus trigger the different knowledge transform process. Then, “tacit knowledge socialization” transformation can show larger positive impact on breakthrough innovation, while “explicit knowledge combination” transformation makes larger impact on incremental innovation.
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Low Sui Pheng and Ben S.K. Lee
Much existing literature was written entirely from a Western perspective without any reference to practices in the East. In the booming east Asian market, project managers from…
Abstract
Much existing literature was written entirely from a Western perspective without any reference to practices in the East. In the booming east Asian market, project managers from the West would need to pay special attention to eastern beliefs, cultures and philosophies. Attempts to put together the managerial grid framework from the West with an ancient Chinese strategic treatise written by Zhuge Liang 1,600 years ago. Suggests that there are many similarities between the managerial grid and Zhuge Liang’s Art of Management when used for leadership development in construction project management.
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Chen Ji, Ni Zhuo and Songqing Jin
Farm income in the agricultural sector is susceptible to natural and market risks. A large body of literature has studied the effects of cooperative membership on household…
Abstract
Purpose
Farm income in the agricultural sector is susceptible to natural and market risks. A large body of literature has studied the effects of cooperative membership on household welfare, technical efficiency, productivity and production behavior, yet little has been known about the impact of cooperative membership on farm income volatility. This paper aims to fill this research gap by investigating the relationship between cooperative membership and farm income volatility of Chinese pig farmers and drawing policy implications.
Design/methodology/approach
This paper examines the effect of cooperative membership on farm income volatility, using data from a two-round survey of pig farmers in China. The authors employ an endogenous switching regression model to address the selection bias issues associated with unobserved factors simultaneously affecting farmers' participation in agricultural cooperatives and income earning activities.
Findings
Using household panel from a two-round survey of 193 pig farmers in China, this analysis highlights two key findings: (1) agricultural cooperative membership has significant and positive effect on farm income stability and (2) the impact of cooperative membership on farm income stability varies with production scale.
Originality/value
This research makes two contributions to the literature. First, this study contributes to the scant literature exploring the relationship between agricultural cooperatives and farm income stability. Second, to the best of the authors' knowledge, this is the first study that explores such relationship in a livestock sector. The pig sector in China and around the developing world has been increasingly challenged by multifaceted risks (e.g. price fluctuations, epidemic diseases, environmental regulations), and understanding the role of agricultural cooperatives in farm income stability of pig farmers is of great practical and policy significance.
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Guang Rui Zhou, Shi Qian Liu, Yuan Jun Sang, Xu Dong Wang, Xiao Peng Jia and Er Zhuo Niu
This paper aims to focus on the variable stick force-displacement (SFD) gradience in the active side stick (ASS) servo system for the civil aircraft.
Abstract
Purpose
This paper aims to focus on the variable stick force-displacement (SFD) gradience in the active side stick (ASS) servo system for the civil aircraft.
Design/methodology/approach
The problem of variable SFD gradience was introduced first, followed by the analysis of its impact on the ASS servo system. To solve this problem, a linear-parameter-varying (LPV) control approach was suggested to process the variable gradience of the SFD. A H∞ robust control method was proposed to deal with the external disturbance.
Findings
To validate the algorithm performance, a linear time-variant system was calculated to be used to worst cases and the SFD gradience was set to linear and non-linear variation to test the algorithm, and some typical examples of pitch angle and side-slip angle tracking control for a large civil aircraft were also used to verify the algorithm. The results showed that the LPV control method had less settling time and less steady tracking errors than H∞ control, even in the variable SFD case.
Practical implications
This paper presented an ASS servo system using the LPV control method to solve the problem caused by the variable SFD gradience. The motor torque command was calculated by pressure and position feedback without additional hardware support. It was more useful for the electronic hydraulic servo actuator.
Originality/value
This was the research paper that analyzed the impact of the variable SFD gradience in the ASS servo system and presented an LPV control method to solve it. It was applicable for the SFD gradience changing in the linear and non-linear cases.
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Yongliang Wang, Yang Ju, Zhuo Zhuang and Chenfeng Li
This study aims to develop an adaptive finite element method for structural eigenproblems of cracked Euler–Bernoulli beams via the superconvergent patch recovery displacement…
Abstract
Purpose
This study aims to develop an adaptive finite element method for structural eigenproblems of cracked Euler–Bernoulli beams via the superconvergent patch recovery displacement technique. This research comprises the numerical algorithm and experimental results for free vibration problems (forward eigenproblems) and damage detection problems (inverse eigenproblems).
Design/methodology/approach
The weakened properties analogy is used to describe cracks in this model. The adaptive strategy proposed in this paper provides accurate, efficient and reliable eigensolutions of frequency and mode (i.e. eigenpairs as eigenvalue and eigenfunction) for Euler–Bernoulli beams with multiple cracks. Based on the frequency measurement method for damage detection, using the difference between the actual and computed frequencies of cracked beams, the inverse eigenproblems are solved iteratively for identifying the residuals of locations and sizes of the cracks by the Newton–Raphson iteration technique. In the crack detection, the estimated residuals are added to obtain reliable results, which is an iteration process that will be expedited by more accurate frequency solutions based on the proposed method for free vibration problems.
Findings
Numerical results are presented for free vibration problems and damage detection problems of representative non-uniform and geometrically stepped Euler–Bernoulli beams with multiple cracks to demonstrate the effectiveness, efficiency, accuracy and reliability of the proposed method.
Originality/value
The proposed combination of methodologies described in the paper leads to a very powerful approach for free vibration and damage detection of beams with cracks, introducing the mesh refinement, that can be extended to deal with the damage detection of frame structures.
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Zhuo Sun, Hong Zhao and Zongshui Wang
The success of social commerce group-buying information system (IS) is not a simple accumulation of functions, but a complex process of system integration that makes it difficult…
Abstract
Purpose
The success of social commerce group-buying information system (IS) is not a simple accumulation of functions, but a complex process of system integration that makes it difficult to design a high-quality website to improve the conversion rate of users has become a top priority for online companies. The purpose of this study is to further improve the IS success model to adapt to the new research scenarios and explore the boundary conditions between different satisfaction and repurchase intention.
Design/methodology/approach
In this study, the users who have used the group-buying website quality for social commerce in the last 6 months are the objects of this study. Finally, 436 valid data were collected by questionnaire survey and analyzed by Smart PLS.
Findings
The results indicate that the four dimensions of website quality enhance consumers' economic satisfaction and social satisfaction, except that the path of system quality and social satisfaction is not significant. Economic satisfaction and social satisfaction also have a significant positive effect on repurchase intentions. Besides, the interactive effect of customer involvement and economic satisfaction has no significant impact on repurchase intention, but customer involvement plays a moderate role in the path of social satisfaction on repurchase intention.
Originality/value
n order to make the IS success model better evaluate the characteristics of social commerce sites comprehensively, this present research introduces the measurement construct of interaction quality. Moreover, this study examines the effect of mechanism of economic satisfaction and social satisfaction on repurchase intention from the perspective of practical benefit and psychology. Finally, the boundary conditions of the effect of satisfaction on repurchase intention are explored.