Guolei Wang, Qiankun Yu, Tianyu Ren, Xiaotong Hua and Ken Chen
To paint large workpieces automatically, painting manipulators with hollow wrists must be transported by mobile platforms to different positions because of their limited…
Abstract
Purpose
To paint large workpieces automatically, painting manipulators with hollow wrists must be transported by mobile platforms to different positions because of their limited workspaces. This paper aims to provide a visualization method for finding appropriate base positions (BPs) and maximum painting areas for manipulators.
Design/methodology/approach
This paper begins by analyzing the motion characteristics of manipulators possessing a spherical wrist and summarizing them into three constraints – positioning, orientation and singularity avoidance. The hollow wrist is simplified and considered as spherical by introducing the concepts of an inner wrist center and an outer wrist center. Taking the three constraints into consideration, the boundaries of the manipulating space are formulated analytically. Finally, to verify the method, the space obtained is applied to determine the maximum painting areas for flat, cylindrical and conical surfaces. Experiments of robotic painting were used to confirm the results.
Findings
Compared with previous studies, the maximum areas obtained using the proposed method increased by 17-131 per cent with an algorithm of lower complexity, and the process remained visually intuitive, thereby demonstrating that the method of manipulating space is more effective.
Originality/value
Such a method allows individuals to visualize the entire painting area at the current BP, thereby maximizing painting areas or optimizing BPs. It opens a black box that is the relationship between BPs and blocks. The method can also be used to choose the best configuration for painting manipulators, select the end-effector structure parameters, split surfaces into blocks, etc.
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Guolei Wang, Xiaotong Hua, Jing Xu, Libin Song and Ken Chen
This paper aims to achieve automatically surface segmentation for painting different kinds of aircraft efficiently considering the demands of painting robot.
Abstract
Purpose
This paper aims to achieve automatically surface segmentation for painting different kinds of aircraft efficiently considering the demands of painting robot.
Design/methodology/approach
This project creatively proposed one method that accepts point cloud, outputs several blocks, each of which can be handled by ABB IRB 5500 in one station. Parallel PointNet (PPN) is proposed in this paper for better handling six dimensional aircraft data including every point normal. Through semantic segmentation of PPN, each surface has its own identity information indicating which part this surface belongs to. Then clustering considering constraints is applied to complete surface segmentation with identity information. To guarantee segmentation paintable and improve painting efficiency, different dexterous workspaces of IRB 5500 corresponding to different postures have been analyzed carefully.
Findings
The experiments confirm the effectiveness of the proposed surface segmentation method for painting different types of aircraft by IRB 5500. For semantic segmentation on aircraft data with point normal, PPN has higher precision than PointNet. In addition, the whole algorithm can efficiently segment one complex aircraft into qualified blocks, each of which has its own identity information, can be painted by IRB 5500 in one station and has fewer edges with other blocks.
Research limitations/implications
As the provided experiments indicate, the proposed method can segment one aircraft into qualified blocks automatically, which highly improves the efficiency in aircraft painting compared with traditional approaches. Moreover, the proposed method is able to provide identity information of each block, which is necessary for application of different paint parameters and different paint materials. In addition, final segmentation results by the proposed method behaves better than k-means cluster on variance of normal vector distance.
Originality/value
Inspired by semantic segmentation of 3 D point cloud, some improvements based on PointNet have been proposed for better handling segmentation of 6 D point cloud. By introducing normal vectors, semantic segmentation could be accomplished precisely for close points with opposite normal, such as wing upper and lower surfaces. Combining deep learning skills with traditional methods, the proposed method is proved to behave much better for surface segmentation task in aircraft painting.
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Xiaotong Li and Wei Su
The study aims to measure the contribution rate of scientific and technological progress of Shaanxi province and find out the main driving force of its economic development, which…
Abstract
Purpose
The study aims to measure the contribution rate of scientific and technological progress of Shaanxi province and find out the main driving force of its economic development, which has important reference significance for formulating and implementing the economic and social development strategy of Shaanxi Province and other regions.
Design/methodology/approach
By comparing and referring to the advantages and disadvantages of existing research methods, this paper combined C-D production function and Solow residual method to calculate the elastic coefficient through neural network algorithm, and then calculated the contribution rate of technological innovation to economic growth in Shaanxi province as a whole and in various regions, analyzed and put forward reasonable suggestions.
Findings
The results show that the economic growth is mainly depends on capital investment, and the contribution rate of technological innovation to economic growth is low and fluctuates greatly. In the future, each region of Shaanxi should improve the ability of technological innovation to speed up the economic transformation to the intensive type.
Originality/value
To make the technological innovation in Shaanxi province and other regions play a more significant role in promoting economic growth and accelerate the productivity and economic transformation of Shaanxi Province, the following suggestions are put forward, strengthen the coordinated development of innovation and economy in all regions of Shaanxi. Second, this paper need to give full play to the role of policy support and incentives. Third, this paper need to improve the market system and vigorously support enterprise innovation. Fourth, use new and high technology to transform and upgrade industrial technology. Fifth, this paper need to speed up the development of high-quality personnel.
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Zhaobin Fan, Ruohan Zhang, Xiaotong Liu and Lin Pan
The purpose of this paper is to estimate the China’s outward FDI efficiency and it determinants in 69 countries along the Belt and Road over the period of 2003-2013.
Abstract
Purpose
The purpose of this paper is to estimate the China’s outward FDI efficiency and it determinants in 69 countries along the Belt and Road over the period of 2003-2013.
Design/methodology/approach
This paper defines the extent of the Belt and Road in terms of geographical boundaries, justifying the application of the stochastic frontier gravity model to the FDI analysis, and then constructing a frontier regression model to assess the China’s outward FDI efficiency and it determinants in countries along the Belt and Road.
Findings
Regarding the core gravity parameter estimates, China’s outward FDI was highly consistent with the gravity model. As far as policy parameters are concerned, China’s outward FDI was significantly restricted by some man-made barriers in host countries. According to the estimated FDI efficiency scores, China has huge outward FDI potential in countries along the Belt and Road. In general, China’s outward FDI efficiency demonstrated a consistent uptrend from the perspectives of both FDI flows and stocks over the period of 2003-2013. Although China’s outward FDI performance indicated a very uneven pattern across different countries and periods, there were no significant performance differences between the Road and Belt.
Practical implications
The Belt and Road initiative can be largely beneficial to China’s outward FDI, but the specific framework of cooperation should be designed on the basis of determinants of China’s outward FDI. The regional cooperation with the Road countries should mainly focus on the removal of business barriers and financial barriers. The regional cooperation with the Belt countries should mainly concern the improvement of local intellectual property protection, the reduction of local tax burden, and removal of business barriers and financial barriers.
Originality/value
To the authors’ best knowledge, no existing literature has specifically examined the efficiency of China’s outward FDI in the countries along the Belt and Road and its determinants.
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Jian Ding, Xiaotong Jiang, Yuchun Zou, Zhen Tang and Ziyang Zhen
A multivariable model reference adaptive control method is proposed to solve a distributed leader–follower formation control problem of unmanned aerial vehicles (UAVs) with…
Abstract
Purpose
A multivariable model reference adaptive control method is proposed to solve a distributed leader–follower formation control problem of unmanned aerial vehicles (UAVs) with uncertain parameters and unknown external disturbances for both leader and followers.
Design/methodology/approach
A case of uncertain stochastic external disturbances for UAVs is considered, and based on the distributed communication network of UAVs, a state-feedback adaptive controller is proposed to maintain the formation of UAVs consistently. Then, the stability and asymptotic tracking performance of the UAV formation control system are analyzed by the Lyapunov function.
Findings
The simulation results demonstrate that this formation control scheme can effectively solve the stochastic external disturbance problem of UAVs and ensure the stability of their formation.
Originality/value
The proposed multivariable model reference adaptive control method reduces the error of formation control system and improves the stability and control performance of UAV compared with fixed control.
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Aiqi Wu, Xiaotong Zhong and Di Song
This paper aims to explore the influence of entrepreneur’s political involvement on private-own enterprises’ (POEs’) selection of two inter-organizational conflict resolutions…
Abstract
Purpose
This paper aims to explore the influence of entrepreneur’s political involvement on private-own enterprises’ (POEs’) selection of two inter-organizational conflict resolutions approaches (private approach and public approach), in the context of China’s transition economy.
Design/methodology/approach
Drawing on a sample of POEs operating in China’s transition economy in the year 2000, this study investigates the possible association between the entrepreneur’s political involvement and the approach chosen to resolve inter-organizational conflicts. A further step is taken to look into the implications of such a choice.
Findings
The empirical study reveals that those POEs with greater entrepreneurial political involvement have the propensity to rely on public approach. In general, POEs are more satisfied with the private approach than the public approach when managing conflicts. Besides, the study shows that the positive effects derived from the entrepreneur’s satisfaction on private approach will be weakened in more established institutions.
Originality/value
This paper has its unique contribution in highlighting the significance of how entrepreneurs’ political involvement interferes with inter-organizational conflict resolution.
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The purpose of this paper is to report the results of a qualitative study exploring the conditions associated with the creation, preservation and transmission of Shuishu archives…
Abstract
Purpose
The purpose of this paper is to report the results of a qualitative study exploring the conditions associated with the creation, preservation and transmission of Shuishu archives in China, and the crises today in their preservation and transmission and the reasons behind them. It also proposes activation mechanisms to shift Shuishu archives from jeopardized collective memory to preservable cultural memory.
Design/methodology/approach
Semi-structured interviews and ethnographic fieldwork were conducted over the course of a month in 2015.
Findings
The creation, preservation and transmission of Shuishu archives in the community of the Shui rely upon the community’s closed system. But this system has been broken as a result of modernization and wide use of new media in China. To preserve and transmit Shuishu archives to future generations, there needs to be mutual trust and equitable cooperation between government archives and the Shuishushi. The “cultural consciousness” of the Shui needs to be stimulated, and more members of the Shui and the whole of society need to participate in the preservation and transmission of this distinctive memory.
Practical implications
The study can provide a provocative example for education in preservation and LIS about community culture and archiving, and the preservation of social memory, identity and culture. The activation mechanisms seek to aid in the preservation and transmission of Shuishu archives and other similar community memory.
Originality/value
The study uses semi-structured interviews and ethnographic methodology to develop a rich understanding of the history and the status quo of the preservation and transmission of Shuishu archives. It redefines Shuishu archives and sheds light on the roles government archives should play in the preservation and transmission of Shuishu archives.
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The purpose of this paper is to analyze the reliability and validity of doctoral candidates’ innovative personality model.
Abstract
Purpose
The purpose of this paper is to analyze the reliability and validity of doctoral candidates’ innovative personality model.
Design/methodology/approach
Based on doctoral candidates’ innovative personality model, this study took the best correlation and the worst correlation into account to predict and demonstrate their innovative ability tendencies. Matlab R2016a, a program of software programming, was used to calculate the contribution degree of each personality factor of doctoral candidates to their innovative ability tendencies.
Findings
The reliability and validity of doctoral candidates’ innovative personality model based on grey target theory have been verified, and the prediction for doctoral candidates’ innovative ability tendencies can be realized on the basis of this model.
Practical implications
Scientific and reasonable doctoral candidates’ innovative personality model can play a good guiding role, and its research results have certain practical significance for selecting innovative doctoral candidates, ensuring the training quality of doctoral candidates and cultivating the innovative ability of doctoral candidates. It can be promoted and applied on the basis of its trial operation in Jiangsu.
Originality/value
With regard to the relative degree of the influence of doctoral candidates’ individual personality factors, previous researchers seldom carried out the quantitative research. In this paper, the author sought a quantitative method to describe the degree of such influence and constructed the doctoral candidates’ innovative personality model based on grey target decision making. This study took the positive and negative off-target distance into account and demonstrated the rationality and validity of doctoral candidates’ innovative personality model.