Yue Qiao, Wang Wei, Yunxiang Li, Shengzui Xu, Lang Wei, Xu Hao and Re Xia
The purpose of this paper is to introduce a motion control method for WFF-AmphiRobot, which can effectively realize the flexible motion of the robot on land, underwater and in the…
Abstract
Purpose
The purpose of this paper is to introduce a motion control method for WFF-AmphiRobot, which can effectively realize the flexible motion of the robot on land, underwater and in the transition zone between land and water.
Design/methodology/approach
Based on the dynamics model, the authors selected the appropriate state variables to construct the state space model of the robot and estimated the feedback state of the robot through the maximum a posteriori probability estimation. The nonlinear predictive model controller of the robot is constructed by local linearization of the model to perform closed-loop control on the overall motion of the robot. For the control problem of the terminal trajectory, using the neural rhythmic movement theory in bionics to construct a robot central pattern generator (CPG) for real-time generation of terminal trajectory.
Findings
In this paper, the motion state of WFF-AmphiRobot is estimated, and a model-based overall motion controller for the robot and an end-effector controller based on neural rhythm control are constructed. The effectiveness of the controller and motion control algorithm is verified by simulation and physical prototype motion experiments on land and underwater, and the robot can ideally complete the desired behavior.
Originality/value
The paper designed a controller for WFF-AmphiRobot. First, when constructing the robot state estimator in this paper, the robot dynamics model is introduced as the a priori estimation model, and the error compensation of the a priori model is performed by the method of maximum a posteriori probability estimation, which improves the accuracy of the state estimator. Second, for the underwater oscillation motion characteristics of the flipper, the Hopf oscillator is used as the basis, and the flipper fluctuation equation is modified and improved by the CPG signal is adapted to the flipper oscillation demand. The controller effectively controls the position error and heading angle error within the desired range during the movement of the WFF-AmphiRobot.
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To study the construction and planning of the library service facility system based on public digital culture teaching in international cultural metropolises, the main body of…
Abstract
To study the construction and planning of the library service facility system based on public digital culture teaching in international cultural metropolises, the main body of resources construction, channels, selection criteria, construction standards, user service policies, service methods and service objects of the National Digital Library of Russia were analyzed. The construction foundation, policy support and digital resource construction of the Chinese and Russian national digital libraries were compared. The results showed that the problem of digital copyright was solved while the library community was constructing digital resources according to the existing rules. Therefore, this method has certain implications for the construction of digital libraries in metropolitan areas in China.
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The purpose of this study is to examine the psychological factors that motivate travelers to consider reusing Airbnb.
Abstract
Purpose
The purpose of this study is to examine the psychological factors that motivate travelers to consider reusing Airbnb.
Design/methodology/approach
This study proposes and tests an integrative model that synthesizes the Theory of Planned Behavior (TPB), Prospect Theory (PT) and other Airbnb-relevant constructs (unique experience expectation, familiarity and electronic word of mouth) as the primary determinants of the Airbnb repurchase intention using an structural equation model (SEM) approach.
Findings
Both attitude and subject norms are significant determinants of repurchase intention, whereas perceived behavioral control is not. In addition, perceived value and risk have only direct significant impacts on attitude and, in turn, indirectly affect repurchase intention. Unique experience expectation, familiarity and electronic word of mouth exert direct and indirect influences on repurchase intention.
Research limitations/implications
This study extends the body of knowledge by integrating TPB and PT to investigate consumer repurchase intention in Airbnb, which provides a theoretical baseline and serves as a starting point for exploring the structural relationships of Airbnb and the sharing economy.
Practical implications
Airbnb should place more emphasis on value packages and authentic/unique travel experience to retain and attract more travelers. More safety/security programs should be put in place and clearly communicated to reduce the perceived risks. In addition, Airbnb may publicize positive word of mouth and introduce and expand familiarity programs to incentivize Airbnb travelers.
Originality/value
This study explores the psychological reasons why travelers will re-patronize Airbnb, providing insights into the motives of Airbnb travelers. A clear understanding of Airbnb travelers’ repurchase intention will facilitate to develop effective strategies for Airbnb to induce positive repurchase behaviors.
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Senmao Xia, Yu Xiong, Min Zhang, James Cornford, Yipeng Liu, Ming K. Lim, Dongmei Cao and Fengwen Chen
The purpose of this paper is to empirically explore the mechanisms through which Chinese National Science Parks' (NSPs) services facilitate returnee entrepreneurs' (REs…
Abstract
Purpose
The purpose of this paper is to empirically explore the mechanisms through which Chinese National Science Parks' (NSPs) services facilitate returnee entrepreneurs' (REs) acquisition of resources for their new ventures. Resource acquisition is crucial for new ventures, but it inevitably leads to significant costs increase. Although the NSPs offer various services to REs to reduce these costs, they still struggle to find the right mix of services.
Design/methodology/approach
From the transaction cost's perspective, an exploratory multiple-case study was conducted with data collected from six NSPs in China.
Findings
The results reveal that four types of NSP services (mentoring and training, social event, promotion of REs and accreditation of resource holders (RHs)) have both individual and joint effects on reducing REs' resource acquisition costs. Specifically, the “accreditation of RHs” service directly helps REs reduce search costs. The combination of “accreditation of RHs”, “promotion of REs” and “social event” services help REs and RHs to establish guanxi. Further, guanxi, working along with the “mentoring and training” service, helps REs to reduce contracting, monitoring and enforcement costs.
Originality/value
This study is among the first to explore the matching mechanisms between science parks’ services and entrepreneurs' cost reduction. This helps reconcile the inconsistent findings on science parks' effect by explaining why some NSPs are able to provide strong support to REs while others are less successful. In addition, the findings are useful for NSPs to develop the right mix of tailored services for REs. Finally, REs will find this study useful to evaluate which NSP is a more suitable location for their new ventures.
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Jiaping Xie, Yu Xia, Ling Liang, Weisi Zhang and Minghong Shi
To promote the development of renewable energy, the Chinese Government adopts the policy of Feed-in Tariff and subsidy. However, the high purchase price and the intermittence…
Abstract
Purpose
To promote the development of renewable energy, the Chinese Government adopts the policy of Feed-in Tariff and subsidy. However, the high purchase price and the intermittence limit the development of renewable energy source electricity (RES-E). The purpose of this paper is to discuss the pricing strategy for system operators to stimulate the development of the RES-E industry under the scenario of uncertain supply and demand.
Design/methodology/approach
The authors establish a two-echelon supply chain investment model led by a power grid operator considering the uncertainties in both demand and supply, and study the impact of the power purchase price designed by a system operator using Stackelberg’s model.
Findings
There is an optimal capacity for RES-E generators, that is, independent of the market demand. Besides, the optimal order of grid operators is independent of the uncertain RES-E supply and the purchase price of fossil fuel. By properly setting the purchase prices, the system operator can stimulate the capacity investment in renewable energy. Finally, increasing the punishment in power shortage can stimulate the capacity investment in RES-E under certain conditions.
Practical implications
The result of this paper can mitigate the phenomenon of power abandonment in the RES-E industry and promote the grid integration of RES-E.
Originality/value
Both uncertain demand and supply are considered in this paper. A heuristic algorithm is provided to compute the optimal purchase price combination.
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Qinghua Xia, Yi Xie, Shuchuan Hu and Jianmin Song
Under extensive pressure from normal market competition, frequent technological change and extreme exogenous shock, firms are facing severe challenge nowadays. How to withstand…
Abstract
Purpose
Under extensive pressure from normal market competition, frequent technological change and extreme exogenous shock, firms are facing severe challenge nowadays. How to withstand discontinuous crises and respond to normal risks through improving resilience (RE) is an important question worth researching. Thus, drawing on the strategic entrepreneurship theory, the purpose of this study is exploring the relationship between entrepreneurial orientation (EO) and RE, and combining digitization to discuss the role of digital business capability (DBC), digital business model innovation (DBMI) and environmental hostility (EH).
Design/methodology/approach
Based on survey data from 203 Chinese firms, using the methods of linear regression and bootstrap to test our hypothesis. Furthermore, fuzzy-set qualitative comparative analysis (FsQCA) is used to identify previously unknown combinations which lead to strong/weak RE in digital context.
Findings
First, EO positively influenced DBC and RE. Second, DBMI promoted RE, DBC and DBMI served as sequential mediators that linked EO and RE. Third, EH positively moderated the effects of EO on RE. Further the study revealed that different configuration of DBMI and dimensions of EO and DBC can explain RE.
Originality/value
The study explains mechanism of RE from perspective of digitization. The conclusion is good for further consolidating strategic entrepreneurship theory, and providing a new frame for firms to build the ability of antifragile.
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The purpose of this study is to investigate how organizations use social media such as blogs to share and re-used knowledge during contingencies, disasters, and emergencies. The…
Abstract
Purpose
The purpose of this study is to investigate how organizations use social media such as blogs to share and re-used knowledge during contingencies, disasters, and emergencies. The factors related to the knowledge itself – rather than the media – which lead to more and less re-use (particularly in the fast-paced and uncertain context of emergencies) are not well known.
Design/methodology/approach
Integrating theories of social media, knowledge management and mass communication, the author develops a model of the characteristics of knowledge (focus, function and features), characteristics of knowledge sharers and the user’s needs, which influence the extent to which knowledge is re-used.
Findings
A study of 645 blog posts revealed why some knowledge is re-used in emergencies more than other types of knowledge. Surprisingly, non-event-related knowledge is re-used more often than event-related knowledge, perhaps because users are less certain about how they would re-use non-event knowledge and, thus, are paradoxically more interested in what it might offer. Results also indicate several other factors which impact re-use.
Practical implications
Traditional mechanisms used to evaluate knowledge for reuse such as rank and organizational status are less important than the focus and function of the knowledge itself; they offer practitioners strategies for more efficient knowledge sharing during emergencies and identify opportunities for more effective employment of emergency management social media.
Originality/value
One of the first studies to dig deeper into factors of knowledge shared and re-used during emergencies, this research integrates several theoretical streams to explain why some knowledge is more valuable for re-use. It increases the understanding of knowledge sharing during disasters and offers strategies for development of knowledge systems for future emergencies.
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Yu Han, Yanqiu Xia, Xin Chen, Liang Sun, Dongyu Liu and Xiangyu Ge
The purpose of this study is to improve the corrosion resistance of the transmission towers by Zinc-aluminum-magnesium (Zn-Al-Mg) coatings doped with rare earths lanthanum (La…
Abstract
Purpose
The purpose of this study is to improve the corrosion resistance of the transmission towers by Zinc-aluminum-magnesium (Zn-Al-Mg) coatings doped with rare earths lanthanum (La) and cerium (Ce) (denoted as Zn-Al-Mg-Re) in Q345 steel.
Design/methodology/approach
The phase structure of Zn-Al-Mg-Re composite coatings has been determined by X-ray diffraction, whereas their surface morphology and cross-sectional microstructure as well as cross-sectional elemental composition have been analyzed by scanning electron microscopy and energy-dispersive spectrometry. Moreover, the corrosion resistance of Zn-Al-Mg-Re composite coatings has been evaluated by acetic acid accelerated salt spray test of copper strip.
Findings
Experimental results show that doping with La and Ce favors to tune the composition (along with the generation of new phase, such as LaAl3 or Al11Ce3) and refine the microstructure of Zn-Al-Mg galvanizing coatings, thereby significantly improving the corrosion resistance of the coatings. Particularly, Zn-Al-Mg-Re with 0.15% (mass fraction) La exhibits the best corrosion resistance among the tested galvanizing coatings.
Originality/Value
Zinc-aluminum-magnesium (Zn-Al-Mg) coatings doped with rare earths lanthanum (La) and cerium (Ce) (denoted as Zn-Al-Mg-Re) have been prepared on Q345 steel substrate by hot-dip galvanizing so as to improve the corrosion resistance of the transmission towers, and to understand the corrosion inhibition of the Zn-Al-Mg-Re coating.
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Song Zhu and Donglin Xia
China's securities market is growing gradually as well as the investors, analysts, intermediates and regulation authorities. Accounting earnings is a key determinant among the…
Abstract
Purpose
China's securities market is growing gradually as well as the investors, analysts, intermediates and regulation authorities. Accounting earnings is a key determinant among the factors influencing stock prices, which even overreacts to earnings. Split‐stock reform (all‐circulation reform) in China provides a chance for investors to revaluate the stock prices. The purpose of this paper is to investigate the market reaction during the reform from the perspective of accounting conservatism.
Design/methodology/approach
Using the data of companies completing the split‐stock reform, this paper empirically investigates how the accounting conservatism influences the market reaction around re‐open day after the reform.
Findings
Accounting information plays its role on stock pricing through the reform of split‐stock reform in the China securities market, evident in the significantly positive relation between the proxies of accounting conservatism and cumulative abnormal returns for one day, three days, ten days and 30 days around re‐open day after the reform. Also, the profitability of listed firms in the past will further improve the positive relation between conservatism and market reaction.
Originality/value
There is ample theoretical work on stock pricing of accounting conservatism but empirical work is scarce, so this paper provides more evidence for the role of stock pricing of accounting conservatism, especially in emerging markets. Second, current research on accounting conservatism in China is focusing on whether conservatism exists and how the conservatism varies; this paper further extends the research field of conservatism from the pricing perspective. Third, researches based on the determinants of stock compensation and market reaction on stock reform lack theoretical analysis, while this paper provides a theory basis for the market reaction during the stock reform.