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Article
Publication date: 27 November 2018

Cunfu Yan, Shujuan Li, Leipeng Yang and Longfei He

The purpose of this paper is to investigate the effects of parameters on the liquid phase migration (LPM) during the freeze-form extrusion fabrication (FEF) process.

Abstract

Purpose

The purpose of this paper is to investigate the effects of parameters on the liquid phase migration (LPM) during the freeze-form extrusion fabrication (FEF) process.

Design/methodology/approach

To carry out this study, three factors were systematically investigated using orthogonal design of experiments. These three parameters are the extrusion velocity, the extrusion interval time and the extrusion head length. An orthogonal array with nine test units was selected for the experiments. Range analysis and analysis of variance were used to analyze the data obtained by the orthogonal experiments to identify the order of significant factors on LPM.

Findings

It was found that the LPM decreased with the increase of extrusion velocity and increased with the lengthening of extrusion interval time and the length of the extrusion nozzle. The order of significant factors for the LPM were found to be extrusion velocity > extrusion nozzle length > extrusion interval time.

Practical implications

Using an orthogonal design of experiments and a statistical analysis method, the liquid content of extrudate can be predicted and appropriate process parameter values can be selected. This leads to the minimization of LPM during the FEF process. Also, this analysis method could be used to study the LPM in other paste extrusion processes.

Originality/value

This paper suggests that the factors have significant impact on LPM during FEF process. The following analysis in this paper is useful for FEF users when prediction of LPM is needed. This methodology could be easily applied to different materials and initial conditions for optimization of other FEF-type processes. The research can also help to get better understanding of LPM during the FEF process.

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Article
Publication date: 7 August 2017

Xin Liang, Lin Xiu, Sibin Wu and Shujuan Zhang

Private firms in China are like the third child in a family, constantly struggling to establish their position in an environment favoring their state-owned and collective…

Abstract

Purpose

Private firms in China are like the third child in a family, constantly struggling to establish their position in an environment favoring their state-owned and collective siblings. The purpose of this paper is to discover some long-term-oriented legitimacy building strategies for private firms in China.

Design/methodology/approach

This paper examines the effect of both internal and external institutional factors on long-term legitimacy for private enterprises. The authors integrate stakeholder perspective and institutional theory to provide a framework of building sustainable legitimacy.

Findings

The authors’ framework delineates that a private company can build sustainable legitimacy through catering long-term legitimacy conferring to constituents such as customers, social responsibility and patriotism in the external institutional environment.

Practical implications

The authors’ framework further indicates how private firms could leverage internal institutional environment through developing appropriate mission, culture, leadership and human resources practices in conformity to the demands of constituents for gaining long-term legitimacy.

Originality/value

This paper is the first to address the short-term nature of legitimacy building strategies proposed in the past literature. In addition, it is also the first attempt to explore the multiplicity in legitimacy in China in search of long-term legitimacy building approaches.

Details

Chinese Management Studies, vol. 11 no. 3
Type: Research Article
ISSN: 1750-614X

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Article
Publication date: 1 July 2014

Shujuan Hou, Zhidan Zhang, Xujing Yang, Hanfeng Yin and Qing Li

The purpose of this paper is to optimize a new thin-walled cellular configurations with crashworthiness criteria, so as to improve the crashworthiness of components of a…

Abstract

Purpose

The purpose of this paper is to optimize a new thin-walled cellular configurations with crashworthiness criteria, so as to improve the crashworthiness of components of a vehicle body.

Design/methodology/approach

ANSYS Parametric Design Language is used to create the parameterized models so that the design variables can be changed conveniently. Moreover, the surrogate technique, namely response surface method, is adopted for fitting objective and constraint functions. The factorial design and D-optimal criterion are employed to screen active parameters for constructing the response functions of the specific energy absorption and the peak crushing force. Finally, sequential quadratic programming-NLPQL is utilized to solve the design optimization problem of the new cellular configurations filled with multi-cell circular tubes under the axial crushing loading.

Findings

Two kinds of distribution modes of the cellular configurations are first investigated, which are in an orthogonal way and in a diamond fashion. After comparing the optimized configurations of the rectangular distribution with the annular distribution of the multi-cell fillers, it is found that the orthogonal way seems better in the aspects of crashworthiness than the diamond fashion.

Originality/value

The two new thin-walled cellular configuration are studied and optimized with the crashworthiness criteria. Study on the new cellular configurations is very valuable for improving the crashworthiness of components of a vehicle body. Meanwhile, the factorial design and the factor screening are adopted in the process of the crashworthiness optimization of the new thin-walled cellular configurations.

Details

Engineering Computations, vol. 31 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

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Article
Publication date: 19 March 2021

Rongxing Duan, Shujuan Huang and Jiejun He

This paper aims to deal with the problems such as epistemic uncertainty, common cause failure (CCF) and dynamic fault behaviours that arise in complex systems and develop…

Abstract

Purpose

This paper aims to deal with the problems such as epistemic uncertainty, common cause failure (CCF) and dynamic fault behaviours that arise in complex systems and develop an effective fault diagnosis method to rapidly locate the fault when these systems fail.

Design/methodology/approach

First, a dynamic fault tree model is established to capture the dynamic failure behaviours and linguistic term sets are used to obtain the failure rate of components in complex systems to deal with the epistemic uncertainty. Second, a β factor model is used to construct a dynamic evidence network model to handle CCF and some parameters obtained by reliability analysis are used to build the fault diagnosis decision table. Finally, an improved Vlsekriterijumska Optimizacija I Kompromisno Resenje algorithm is developed to obtain the optimal diagnosis sequence, which can locate the fault quickly, reduce the maintenance cost and improve the diagnosis efficiency.

Findings

In this paper, a new optimal fault diagnosis strategy of complex systems considering CCF under epistemic uncertainty is presented based on reliability analysis. Dynamic evidence network is easy to carry out the quantitative analysis of dynamic fault tree. The proposed diagnosis algorithm can determine the optimal fault diagnosis sequence of complex systems and prove that CCF should not be ignored in fault diagnosis.

Originality/value

The proposed method combines the reliability theory with multiple attribute decision-making methods to improve the diagnosis efficiency.

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: 4 February 2020

Bo Yang, Shujuan Ye and Mohammadreza Bandarchi

This paper tries to examine attitude toward knowledge sharing (KS) for improving the innovation in medical services. So, this paper aims to analyze the influence of…

Abstract

Purpose

This paper tries to examine attitude toward knowledge sharing (KS) for improving the innovation in medical services. So, this paper aims to analyze the influence of information technology (IT), staff, hospital cultures and patients and their families on the attitude toward KS and also examine the influence of attitude toward KS on innovation in medical services.

Design/methodology/approach

This paper presented a project plan that contains five research hypotheses, with attitude toward KS as a mediating construct. In this paper, Smart PLS 3.0 is implemented to study the calculation. The hypotheses are tested on data collected using structural equation modeling. Data was collected using questionnaires from a hospital in Iran. The statistical population of this research is unlimited. Through using the sample measurement method, the sample size for structural equations has come to be 384.

Findings

The results showed that all theories of the project are proved. Also, they indicated the importance of IT as an important factor in attitude toward KS and the latter's influence on the innovation in medical services. Furthermore, the attitude toward KS influences positively on innovation in medical services. As a general result, the managers of health organizations should empower employees to participate in decision-making and encourage them to resolve problems together and share medical information to promote innovation in medical services.

Research limitations/implications

This research must be carefully defined and accepted because the study information had special restrictions. At first, a prejudice was created, because the sample was self-selected. Second, the participants were living in Iran. There were different cultures and lifestyles among countries. Third, this research sample consisted only of hospital staff and managers. Moreover, little empirical research has been conducted on this topic in Iran. Iran’s culture is considerably different from Western culture, and it is unknown whether the same questionnaire that is used in the Iran context can be used in the Western context. In further studies, this research could be extended to contain other psychosocial elements that permit KS in institutions and increase innovation.

Practical implications

The medical industry is knowledge-intensive, remains a competitive advantage and accumulates knowledge, and the hospitals are the main subject. The role of this research according to providing a functional-theoretical plan enables authorities and practitioners to access thoughts about efficient stimulation attitude toward KS on innovation in medical services in the health sector. Also, the findings of this study at the same time are implemented to study relations between knowledge-sharing elements such as enablers, processes and firm innovation capability.

Originality/value

Modern study design enables the relations between IT and other influential elements on attitude toward KS and innovation in medical services to be analyzed. This design determines the coexistence of the participation and contest relations among participants, which is not studied in past researches. From a management point of view, this research determined various elements essential to a successful attitude toward KS and investigated the usage of these elements for improving innovation in medical services.

Details

VINE Journal of Information and Knowledge Management Systems, vol. 50 no. 4
Type: Research Article
ISSN: 2059-5891

Keywords

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Article
Publication date: 1 August 2016

Miao Cui, Crystal Dong, Yuekun Liu and Shujuan Wang

An increasing number of Chinese enterprises are involved in cross-border mergers and acquisitions (M&As). However, few Chinese enterprises have achieved successful…

Abstract

Purpose

An increasing number of Chinese enterprises are involved in cross-border mergers and acquisitions (M&As). However, few Chinese enterprises have achieved successful integration, which plays a critical role in enhancing performance. The important field of cultural integration is currently facing major challenges. To identify the reasons for these challenges, studies have analyzed why cultural integration succeeds or fails and have suggested that cultural differences between acquiring and acquired enterprises are the primary obstacles to cultural integration. However, it is unclear how success can be achieved. The paper aims to focus on cultural integration from the perspective of acculturation to describe the penetration of cultural elements in M&As.

Design/methodology/approach

In adopting acculturation as our theoretical lens, the authors use the case study method to answer the following research question: “how can the cultural integration of Chinese enterprises be successfully achieved?” Two typical cases are examined: Lenovo’s cultural integration with IBM’s personal computer (PC) division and Haier’s cultural integration with Sanyo home appliance. First, using the exploratory case study method, the Lenovo–IBM PC division case is analyzed. The characteristics and relationships between cultural environments, employee adoption methods and acculturation patterns are summarized to reveal a cultural integration path. Second, the Haier–Sanyo home appliance case is analyzed using the confirmative case study method to test the findings of the Lenovo–IBM PC division case.

Findings

The results indicate that it is critical to achieve a dynamic fit between cultural environments, employee adoption methods and acculturation patterns during each stage of cultural integration (exploration, experimentation, reinforcement and fixing). The three constructs of these stages reflect the following evolutionary paths: “isolate-introduce-learning-chance taking”, “detecting-icebreaking-interacting-remodeling” and “specialized sections-senior managers-managers-employees”.

Originality/value

These findings contribute to the development of cultural integration and acculturation theories and serve as a reference for Chinese enterprises wishing to implement cultural integration strategies.

Details

Nankai Business Review International, vol. 7 no. 3
Type: Research Article
ISSN: 2040-8749

Keywords

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Article
Publication date: 10 January 2020

Yining Zeng, Rongxing Duan, Shujuan Huang and Tao Feng

This paper aims to deal with the problems of failure dependence and common cause failure (CCF) that arise in reliability analysis of complex systems.

Abstract

Purpose

This paper aims to deal with the problems of failure dependence and common cause failure (CCF) that arise in reliability analysis of complex systems.

Design/methodology/approach

Firstly, a dynamic fault tree (DFT) is used to capture the dynamic failure behaviours and converted into an equivalent generalized stochastic petri net (GSPN) for quantitative analysis. Secondly, an efficient decomposition and aggregation (EDA) theory is combined with GSPN to deal with the CCF problem, which exists in redundant systems. Finally, Birnbaum importance measure (BIM) is calculated based on the EDA approach and GSPN model, and it is used to take decisions for system improvement and fault diagnosis.

Findings

In this paper, a new reliability evaluation method for dynamic systems subject to CCF is presented based on the DFT analysis and the GSPN model. The GSPN model is easy to capture dynamic failure behaviours of complex systems, and the movement of tokens in the GSPN model represent the changes in the state of the systems. The proposed method takes advantage of the GSPN model and incorporates the EDA method into the GSPN, which simplifies the reliability analysis process. Meanwhile, simulation results under different conditions show that CCF has made a considerable impact on reliability analysis for complex systems, which indicates that the CCF should not be ignored in reliability analysis.

Originality/value

The proposed method combines the EDA theory with the GSPN model to improve the efficiency of the reliability analysis.

Details

Engineering Computations, vol. 37 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

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Article
Publication date: 4 April 2016

Yang Lu, Shujuan Yi, Yurong Liu and Yuling Ji

This paper aims to design a multi-layer convolutional neural network (CNN) to solve biomimetic robot path planning problem.

Abstract

Purpose

This paper aims to design a multi-layer convolutional neural network (CNN) to solve biomimetic robot path planning problem.

Design/methodology/approach

At first, the convolution kernel with different scales can be obtained by using the sparse auto encoder training algorithm; the parameter of the hidden layer is a series of convolutional kernel, and the authors use these kernels to extract first-layer features. Then, the authors get the second-layer features through the max-pooling operators, which improve the invariance of the features. Finally, the authors use fully connected layers of neural networks to accomplish the path planning task.

Findings

The NAO biomimetic robot respond quickly and correctly to the dynamic environment. The simulation experiments show that the deep neural network outperforms in dynamic and static environment than the conventional method.

Originality/value

A new method of deep learning based biomimetic robot path planning is proposed. The authors designed a multi-layer CNN which includes max-pooling layer and convolutional kernel. Then, the first and second layers features can be extracted by these kernels. Finally, the authors use the sparse auto encoder training algorithm to train the CNN so as to accomplish the path planning task of NAO robot.

Details

Assembly Automation, vol. 36 no. 2
Type: Research Article
ISSN: 0144-5154

Keywords

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Article
Publication date: 5 December 2016

David O. Obada, Muhammad Dauda, Fatai O. Anafi, Abdulkarim S. Ahmed and Olusegun A. Ajayi

A structural and textural characterization study has been performed to investigate the adherence of zeolite-based catalyst washcoated onto honey-comb-type cordierite…

Abstract

Purpose

A structural and textural characterization study has been performed to investigate the adherence of zeolite-based catalyst washcoated onto honey-comb-type cordierite monoliths. The supports were characterized by the scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) techniques.

Design/methodology/approach

SEM/EDS provided quantitative estimate of the washcoated monolith as the elemental composition of catalyst coating. The XRD pattern deduced that the zeolite-based catalysts were successfully mounted on the cordierite support, showing the characteristic peaks of zeolites (Zeolite Socony Mobil–5; ZSM-5) at Braggs angles of 7.88°, 8.76°, 23.04°, 23.88° and 24.36°, whereas the characteristic peak of cordierite is seen at a Braggs angle of 10.44°.

Findings

The BET results proved that a monolayer of zeolite may serve the need for surface area and porosity. This was evident in the increase of surface area of washcoated support as against the bare support. The obtained isotherms were of Type IV, illustrating the presence of mesopores. The adsorption and desorption isotherm branches coincided over the interval 0 < P/P0 < 0.50 and 0 < P/P0 < 0.45, showing N2 reversible adsorption for the two samples, respectively.

Originality/value

It was concluded that the composite materials which are ZSM-5 (Si/Al = 25) and precursors of the transition salts of copper, zinc and ceria powders were deposited on the catalyst supports, establishing the success of the coating procedure relative to the adherence of the catalyst compositions on the ceramic support.

Details

World Journal of Engineering, vol. 13 no. 6
Type: Research Article
ISSN: 1708-5284

Keywords

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