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Article
Publication date: 12 July 2021

Zhi Li, Song Cen and Chenfeng Li

The purpose of this paper is to extend a recent unsymmetric 8-node, 24-DOF hexahedral solid element US-ATFH8 with high distortion tolerance, which uses the analytical…

Abstract

Purpose

The purpose of this paper is to extend a recent unsymmetric 8-node, 24-DOF hexahedral solid element US-ATFH8 with high distortion tolerance, which uses the analytical solutions of linear elasticity governing equations as the trial functions (analytical trial function) to geometrically nonlinear analysis.

Design/methodology/approach

Based on the assumption that these analytical trial functions can still properly work in each increment step during the nonlinear analysis, the present work concentrates on the construction of incremental nonlinear formulations of the unsymmetric element US-ATFH8 through two different ways: the general updated Lagrangian (UL) approach and the incremental co-rotational (CR) approach. The key innovation is how to update the stresses containing the linear analytical trial functions.

Findings

Several numerical examples for 3D structures show that both resulting nonlinear elements, US-ATFH8-UL and US-ATFH8-CR, perform very well, no matter whether regular or distorted coarse mesh is used, and exhibit much better performances than those conventional symmetric nonlinear solid elements.

Originality/value

The success of the extension of element US-ATFH8 to geometrically nonlinear analysis again shows the merits of the unsymmetric finite element method with analytical trial functions, although these functions are the analytical solutions of linear elasticity governing equations.

Details

Engineering Computations, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0264-4401

Keywords

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Article
Publication date: 19 July 2019

Song Cen, Cheng Jin Wu, Zhi Li, Yan Shang and Chenfeng Li

The purpose of this paper is to give a review on the newest developments of high-performance finite element methods (FEMs), and exhibit the recent contributions achieved…

Abstract

Purpose

The purpose of this paper is to give a review on the newest developments of high-performance finite element methods (FEMs), and exhibit the recent contributions achieved by the authors’ group, especially showing some breakthroughs against inherent difficulties existing in the traditional FEM for a long time.

Design/methodology/approach

Three kinds of new FEMs are emphasized and introduced, including the hybrid stress-function element method, the hybrid displacement-function element method for Mindlin–Reissner plate and the improved unsymmetric FEM. The distinguished feature of these three methods is that they all apply the fundamental analytical solutions of elasticity expressed in different coordinates as their trial functions.

Findings

The new FEMs show advantages from both analytical and numerical approaches. All the models exhibit outstanding capacity for resisting various severe mesh distortions, and even perform well when other models cannot work. Some difficulties in the history of FEM are also broken through, such as the limitations defined by MacNeal’s theorem and the edge-effect problems of Mindlin–Reissner plate.

Originality/value

These contributions possess high value for solving the difficulties in engineering computations, and promote the progress of FEM.

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Article
Publication date: 29 November 2018

W.M. Wang, J.W. Wang, A.V. Barenji, Zhi Li and Eric Tsui

The purpose of this paper is to propose an automated machine learning (AutoML) and multi-agent system approach to improve overall product delivery satisfaction under…

Abstract

Purpose

The purpose of this paper is to propose an automated machine learning (AutoML) and multi-agent system approach to improve overall product delivery satisfaction under limited resources.

Design/methodology/approach

An AutoML method is purposed to model delivery satisfaction of individual customer, and a heuristic method and multi-agent system are proposed to improve overall satisfaction under limited processing capability. A series of simulation experiments have been conducted to illustrate the effectiveness of the proposed methodology.

Findings

The simulated results show that the proposed method can effectively improve overall delivery satisfaction, especially when the demand of customer orders is highly fluctuating and when the customer satisfaction models are highly diversified.

Practical implications

The proposed framework provides a more dynamic and continuously improving way to model delivery satisfaction of individual customer, thereby supports companies to provide personalized services and develop scalable and flexible business at a lower cost, and ultimately improves the overall quality, efficiency and effectiveness of delivery services.

Originality/value

The proposed methodology utilizes AutoML and multi-agent system to model individual customer delivery satisfaction and improve the overall satisfaction. It can cooperate with the existing delivery resource planning methods to further improve customer delivery satisfaction. The authors propose an AutoML approach to model individual customer delivery satisfaction, which enables continuous update and improvements. The authors propose multi-agent system and a heuristic method to improve overall delivery satisfaction. The numerical results show that the proposed method can improve overall delivery satisfaction with limited processing capability.

Details

Industrial Management & Data Systems, vol. 119 no. 4
Type: Research Article
ISSN: 0263-5577

Keywords

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Article
Publication date: 3 July 2017

Anan Zhang, Fan Zhang, Zhi Li, Qian Li, Xuliang Zhang and Jing Wang

With the growing scale of power grids, integrated power grids often contain multiple areas. When the control centre of each regional grid conducts an assessment of local…

Abstract

Purpose

With the growing scale of power grids, integrated power grids often contain multiple areas. When the control centre of each regional grid conducts an assessment of local voltage stability, the calculation is always based on the local regional power grid model. However, less consideration is given to a detailed model of the entire network, which may lead to a large calculation error. Under the premise of ensuring the data and information security of Supervisory Control and Data Acquisition between different regional power grid operation control centres, the purpose of this paper is to reduce calculation error simply by using the data of a local power network.

Design/methodology/approach

According to the calculation methodology of “decomposition and coordination” and the power balance equation of an interconnected power grid, an improved radial equivalent independent (REI) equivalent method, which can reflect the dynamic characteristics of interconnected power grids to a certain extent, is proposed in this paper. A mathematical model of multi-area-grid L indicator synergic computing is derived as well.

Findings

With the calculation of Institute of Electrical and Electronics Engineers (IEEE) standard grids and an actual grid model, it is proven that the method proposed in this paper can significantly improve the accuracy of the regional power grid L indicator calculation and achieve the synergic computing of a multi-area power system L indicator, without an increase in data interaction among the regional power grids.

Originality/value

The indicator of voltage stability among multi-area was obtained by using the improved REI equivalent method with the change of the load participation factor. Particularly, the coordinated calculation method can be implemented on a local power grid without knowledge of all the parameters of its interconnection, which can avoid possible leakage of confidential data and information of the system owners.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 36 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 12 August 2020

Zhi Li, Jiuchang Wei, Dora Vasileva Marinova and Jingjing Tian

This paper aims to explore the explanations of “information effect” and “agency effect” of corporate diversification with cross-industry knowledge under a crisis situation.

Abstract

Purpose

This paper aims to explore the explanations of “information effect” and “agency effect” of corporate diversification with cross-industry knowledge under a crisis situation.

Design/methodology/approach

Based on an event study of 203 public companies’ crises in China between 2008 and 2018, the authors verify the information and agency effects of corporate diversification under a crisis situation by, respectively, examining the effects of interactions of corporate unrelated diversification with corporate transparency and knowledge deficiency attribution on the stock market’s responses to the crises.

Findings

It is found that corporate unrelated diversification serves as a buffer in protecting firm value while attribution of knowledge deficiency can be a burden. The buffering effect is stronger when the corporate transparency is higher but weaker when the crisis is attributed to be caused by corporate tacit knowledge deficiency.

Practical implications

Unrelated diversified firms should strengthen information communication with stakeholders so as to break down the stakeholders’ cross-industry knowledge barriers, and thus protect their own value at the crisis’ onset. Also, they can further buffer the loss by reducing stakeholders’ perceptions of the corporate tacit knowledge deficiency revealed in the crisis.

Originality/value

This study is the first to illustrate that the information and agency effects of corporate diversification strategy can be partially explained under a crisis situation, which provides meaningful insights about how firms can conduct knowledge management in their daily operations to deal better with corporate crises.

Details

Journal of Knowledge Management, vol. 25 no. 1
Type: Research Article
ISSN: 1367-3270

Keywords

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Article
Publication date: 5 February 2018

Zhi Li, W.M. Wang, Guo Liu, Layne Liu, Jiadong He and G.Q. Huang

The purpose of this paper is to propose a cross-enterprises framework to achieve a higher level of sharing of knowledge and services in manufacturing ecosystems.

Abstract

Purpose

The purpose of this paper is to propose a cross-enterprises framework to achieve a higher level of sharing of knowledge and services in manufacturing ecosystems.

Design/methodology/approach

The authors describe the development of the emerging open manufacturing and discuss the model of knowledge creation processes of manufacturers. The authors present a decentralized framework based on blockchain and edge computing technologies, which consists of a customer layer, an enterprise layer, an application layer, an intelligence layer, a data layer, and an infrastructure layer. And a case study is provided to illustrate the effectiveness of the framework.

Findings

The authors discuss that the manufacturing ecosystem is changing from integrated and centralized systems to shared and distributed systems. The proposed framework incorporates the recent development in blockchain and edge computing that can meet the secure and distributed requirements for the sharing of knowledge and services in manufacturing ecosystems.

Practical implications

The proposed framework provides a more secure and controlled way to share knowledge and services, thereby supports the company to develop scalable and flexible business at a lower cost, and ultimately improves the overall quality, efficiency, and effectiveness of manufacturing services.

Originality/value

The proposed framework incorporates the recent development in edge computing technologies to achieve a flexible and distributed network. With the blockchain technology, it provides standards and protocols for implementing the framework and ensures the security issues. Not only information can be shared, but the framework also supports in the exchange of knowledge and services so that the parties can contribute their parts.

Details

Industrial Management & Data Systems, vol. 118 no. 1
Type: Research Article
ISSN: 0263-5577

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Article
Publication date: 4 February 2020

Gao Lin, Wen-Bin Ye, Zhi-Yuan Li and Jun Liu

The purpose of this paper is to present an accurate and efficient element for analysis of spherical shell structures.

Abstract

Purpose

The purpose of this paper is to present an accurate and efficient element for analysis of spherical shell structures.

Design/methodology/approach

A scaled boundary finite element method is proposed, which offers more advantages than the finite element method and boundary element method. Only the boundary of the computational domain needs to be discretized, but no fundamental solution is required.

Findings

The method applies to thin as well as thick spherical shells, irrespective of the shell geometry, boundary conditions and applied loading. The numerical solution converges to highly accurate result with raising the order of high-order elements.

Originality/value

The modeling strictly follows three-dimensional theory of elasticity. Formulation of the surface finite elements using three translational degree of freedoms per node is required, which results in considerably simplifying the computation. In the thickness directions, it is solved analytically, no problem of high aspect ratio arises and transverse shear locking can be successfully avoided.

Details

Engineering Computations, vol. 37 no. 6
Type: Research Article
ISSN: 0264-4401

Keywords

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Article
Publication date: 2 March 2020

Zhi Li, Yuemeng Ge, Zegang Su and Xiaohua Huang

This study aims to analyze the basic information of visitors of the Macau Science Center to assess their leisure involvement, satisfaction and behavioral intention, along…

Abstract

Purpose

This study aims to analyze the basic information of visitors of the Macau Science Center to assess their leisure involvement, satisfaction and behavioral intention, along with the interaction of these factors. Suggestions are made for museum policy modifications to improve visitor experience quality.

Design/methodology/approach

The analysis methods used in this study included reliability, descriptive statistics, independent-samples t test, ANOVA, correlation analysis and regression analysis.

Findings

The results showed that there was no significant relationship between gender and satisfaction, involvement of leisure or behavioral intention; age and educational level had significant impacts on satisfaction, leisure involvement and behavioral intention; significant differences were found in terms of visitors’ point of geographic origin, namely, local residents, mainland residents and Hong Kong residents; occupation was found to have no significant impact on satisfaction, leisure involvement or behavioral intention; monthly income was found to have no significant impact on leisure involvement and behavioral intention, but did have a significant impact on satisfaction; number of visits had no significant impact; there was no significant difference in leisure involvement and behavioral intention among different types of visitors, but there was a significant difference in terms of satisfaction; and significant correlations were found between leisure involvement and behavioral intentions.

Originality/value

The value of this study is to identify problems and offer potential solutions for the improvement of the Macau Science Center by studying the leisure involvement, satisfaction and behavioral intention of museum visitors. The proposed measures can improve the visibility and quality of the science museum, attract additional visitors and improve Macau’s branding through promoting science education and tourism.

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Article
Publication date: 23 January 2019

Huang Jianbin, Li Zhi, Huang Longfei, Meng Bo, Han Xu and Pang Yujia

According to the requirements of servicing and deorbiting the failure satellites, especially the tumbling ones on geosynchronous orbit, this paper aims to design a docking…

Abstract

Purpose

According to the requirements of servicing and deorbiting the failure satellites, especially the tumbling ones on geosynchronous orbit, this paper aims to design a docking mechanism to capture these tumbling satellites in orbit, to analyze the dynamics of the docking system and to develop a new collision force-limited control method in various docking speeds.

Design/methodology/approach

The mechanism includes a cone-rod mechanism which captures the apogee engine with a full consideration of despinning and damping characteristics and a locking and releasing mechanism which rigidly connects the international standard interface ring (Marman rings, such as 937B, 1194 and 1194A mechanical interface). The docking mechanism was designed under-actuated, aimed to greatly reduce the difficulty of control and ensure the continuity, synchronization and force uniformity under the process of repeatedly capturing, despinning, locking and releasing the tumbling satellite. The dynamic model of docking mechanism was established, and the impact force was analyzed in the docking process. Furthermore, a collision detection and compliance control method is proposed by using the active force-limited Cartesian impedance control and passive damping mechanism design.

Findings

A variety of conditions were set for the docking kinematics and dynamics simulation. The simulation and low-speed docking experiment results showed that the force translation in the docking phase was stable, the mechanism design scheme was reasonable and feasible and the proposed force-limited Cartesian impedance control could detect the collision and keep the external force within the desired value.

Originality/value

The paper presents a universal docking mechanism and force-limited Cartesian impedance control approach to capture the tumbling non-cooperative satellite. The docking mechanism was designed under-actuated to greatly reduce the difficulty of control and ensure the continuity, synchronization and force uniformity. The dynamic model of docking mechanism was established. The impact force was controlled within desired value by using a combination of active force-limited control approach and passive damping mechanism.

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Article
Publication date: 16 January 2017

Wenxue Lu, Zhi Li and Siqi Wang

Justice, although well developed in the organisational field, has not been given adequate attention in the area of construction project dispute negotiations. Based on…

Abstract

Purpose

Justice, although well developed in the organisational field, has not been given adequate attention in the area of construction project dispute negotiations. Based on previous studies, the purpose of this paper is to more elaborately discuss whether each dimension of justice (distributive, procedural and interactional) is important for negotiators to cooperate in construction project dispute negotiation and whether their impact was moderated by the completeness of construction contract.

Design/methodology/approach

A survey of 164 prime negotiators from different construction projects was conducted. A stepwise multiple regression was employed to test the impact of each dimension of justice, and then a moderated multiple regression model was used to test the moderating effect of contract completeness.

Findings

The results indicated that, while distributive justice is related to cooperative behaviours, the impact of procedural justice and interactional justice also have great impact, and even more significantly related to cooperative behaviours. Moreover, while contractual obligatoriness positively moderates the relationship between procedural justice and cooperative behaviours, the term specificity negatively moderates the relationship between procedural and interactional justice and cooperative behaviours.

Research limitations/implications

First, the authors aimed to test the effect of justice on cooperative behaviours in construction dispute negotiations originally, but did not determine whether their relationship is mediated by any other factors. Second, contractual governance was chosen as the moderator; other factors may also influence behaviours in project dispute negotiations.

Practical implications

First, project dispute negotiators should not focus their attention solely on the distribution of the negotiation issues. For a cooperative approach, negotiators should also give strong consideration to whether their offers reflect procedural justice and whether their opponents are being treated fairly. Second, while contractual design may affect the frame surrounding the negotiations to help negotiators achieve an integrated outcome, they should give more attention to certain forms of justice.

Originality/value

In contrast to previous studies, the authors defined all three forms of justice in project dispute negotiations, and by adding all three forms of justice into the model, the authors attempted to investigate whether distributive, procedural and interactional justice were all related to cooperative behaviours in project dispute negotiations and to ascertain the extent to which each form of justice is important. Furthermore, the authors explored variations in the importance of each form of justice in negotiations under different contractual conditions.

Details

Engineering, Construction and Architectural Management, vol. 24 no. 1
Type: Research Article
ISSN: 0969-9988

Keywords

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