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Article
Publication date: 9 October 2019

Hui Chen and Donghai Liu

The purpose of this study is to develop a stochastic finite element method (FEM) to solve the calculation precision deficiency caused by spatial variability of dam…

Abstract

Purpose

The purpose of this study is to develop a stochastic finite element method (FEM) to solve the calculation precision deficiency caused by spatial variability of dam compaction quality.

Design/methodology/approach

The Choleski decomposition method was applied to generate constraint random field of porosity. Large-scale laboratory triaxial tests were conducted to determine the quantitative relationship between the dam compaction quality and Duncan–Chang constitutive model parameters. Based on this developed relationship, the constraint random fields of the mechanical parameters were generated. The stochastic FEM could be conducted.

Findings

When the fully random field was simulated without the restriction effect of experimental data on test pits, the spatial variabilities of both displacement and stress results were all overestimated; however, when the stochastic FEM was performed disregarding the correlation between mechanical parameters, the variabilities of vertical displacement and stress results were underestimated and variation pattern for horizontal displacement also changed. In addition, the method could produce results that are closer to the actual situation.

Practical implications

Although only concrete-faced rockfill dam was tested in the numerical examples, the proposed method is applicable for arbitrary types of rockfill dams.

Originality/value

The value of this study is that the proposed method allowed for the spatial variability of constitutive model parameters and that the applicability was confirmed by the actual project.

Details

Engineering Computations, vol. 36 no. 9
Type: Research Article
ISSN: 0264-4401

Keywords

Open Access
Article
Publication date: 2 January 2020

Donghai Liu, Youle Wang, Junjie Chen and Yalin Zhang

The purpose of this paper is to provide insights into the current practice, challenges and future development trends of intelligent compaction (IC) technology from a…

2256

Abstract

Purpose

The purpose of this paper is to provide insights into the current practice, challenges and future development trends of intelligent compaction (IC) technology from a bibliometric perspective.

Design/methodology/approach

A bibliometric analysis on IC-relevant studies is presented. Through this quantitative manner, insights into the current IC research practice and development trends have been derived from the perspectives of publications and citations, spatial distribution, knowledge construction, structural variations, existing problems, and conclusions and recommendations.

Findings

Currently, IC applications are confronted with the issues of intelligent compaction measurement values (ICMVs) applicability, autonomous control, specifications and applications. To address the issues, three potential research directions are identified: a comprehensive ICMV measurement system that is designated for single layer analysis; autonomous control mechanisms with integrated management capabilities that can efficiently collaborate all stakeholders; and a standardized application workflow and the cost-benefit evaluation of IC in the context of the full life cycle.

Research limitations/implications

The literature used in this paper is collected from the Web of Science. Although the database covers almost all the important publications in IC field, studies not indexed by the database are not considered.

Originality/value

This research quantitatively analyzes the current IC practice and development trends from the perspectives of bibliometric analysis. It provides an overview of the knowledge construction and development of IC technology. The discussions about the problems and the suggested solutions can be useful for those interested in this field.

Details

Engineering, Construction and Architectural Management, vol. 27 no. 5
Type: Research Article
ISSN: 0969-9988

Keywords

Article
Publication date: 18 March 2022

Donghai Wang, Wei Sun, Zhihui Gao and Hui Li

In many cases, the external pipelines of aero-engine are subjected to random excitation. The purpose of this paper is to reduce the vibration response of the pipeline…

Abstract

Purpose

In many cases, the external pipelines of aero-engine are subjected to random excitation. The purpose of this paper is to reduce the vibration response of the pipeline system effectively by adjusting the hoop layout.

Design/methodology/approach

In this paper, a spatial pipeline supported by multi-hoops is taken as the object, the methods of solution of the vibration response of the pipeline system by using pseudo excitation and hoop layouts optimization with amplitude reduction of vibration response as the goal are presented. First, the finite element model of the spatial pipeline system is presented. Then, an optimization model spatial pipeline is established. Finally, a case study is carried out to prove the rationality of the random vibration response analysis of the pipeline system. Furthermore, the proposed optimization model and genetic algorithm are applied to optimize the hoop layout.

Findings

The results show that the maximum response variance after optimization is reduced by 32.8%, which proves the rationality of the developed hoop layout optimization method.

Originality/value

The pseudo excitation method is used to solve the vibration response of aero-engine pipeline system, and the optimization of the hoop layout for aero-engine spatial pipelines under random excitation to reduce random vibration response is studied systematically.

Details

Aircraft Engineering and Aerospace Technology, vol. 94 no. 8
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 7 August 2020

Zheng Xin and Donghai Su

In order to certify the testing of vehicle Cd on the real road can be replaced by the much simplified steady-state simulation process inside wind tunnel.

Abstract

Purpose

In order to certify the testing of vehicle Cd on the real road can be replaced by the much simplified steady-state simulation process inside wind tunnel.

Design/methodology/approach

The paper opted innovative methods to verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose, including establishing the typical sinusoidal mapping function for road shapes during vehicle driving process to simplify the complexity of the road and choosing three different kinds of road spectrum amplitudes to establish the vehicle motion model, which can accurately predict the vehicle motion characteristics in the road driving process. The new approach simulates the vehicle aerodynamics on the road by taking into account the pitch angle changes during vehicle motion.

Findings

By comparing the transient drag coefficient on road with the steady-state simulated value in the conventional aerodynamic wind tunnel. This paper provides empirical insights about the flow field analysis around the vehicle on road that can verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose.

Research limitations/implications

Because of establishing the typical sinusoidal mapping function for road shapes, the study results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further.

Practical implications

This paper includes implications for the flow field analysis around the vehicle on road that can verify the feasibility of using aerodynamic wind tunnel test for vehicle development purpose.

Originality/value

This paper fulfills an identified need to use aerodynamic wind tunnel test for vehicle development purpose.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Open Access
Article
Publication date: 29 August 2022

Ninghua Sun and Lei Zeng

China's economic transition is essentially the process of China's institutional changes. During the changes, the appearance of institutional innovation is not regular;…

Abstract

Purpose

China's economic transition is essentially the process of China's institutional changes. During the changes, the appearance of institutional innovation is not regular; instead, it is intermittent and random. The purpose of this paper is to show that the fitful appearance of institutional innovation is the root of China's economic growth and fluctuations.

Design/methodology/approach

This paper constructs a real business cycle (RBC) model introducing the institutional factor expressed in the quantitative form under the dynamic stochastic general equilibrium (DSGE) framework by measuring China's institutional changes quantitatively.

Findings

By comparing the characteristics of the actual economic data with those of the simulated economic data, we find that this RBC model can explain 94.44%, 66.07%, 23.46%, 21.03% and 15.45% of the cyclical fluctuations in output, investment, labor, consumption and capital, respectively.

Originality/value

The impulse response analysis finds that the institutional shocks have a relatively long duration, lasting about 30 years, and decline slowly over time, while technological shocks decline relatively fast, lasting approximately ten years.

Details

China Political Economy, vol. 5 no. 2
Type: Research Article
ISSN: 2516-1652

Keywords

Article
Publication date: 9 June 2020

Zihao Shen, Yang Li, Kuizhou Liu, Jin Zhang and Yu Su

The coefficient of thermal expansion (CTE) and modulus of elasticity (ME) values of mortar and stone from room temperature to cryogenic temperatures provide an…

Abstract

Purpose

The coefficient of thermal expansion (CTE) and modulus of elasticity (ME) values of mortar and stone from room temperature to cryogenic temperatures provide an experimental basis for the design of liquefied natural gas (LNG) storage tanks.

Design/methodology/approach

The CTE and ME of mortar and limestone were measured by resistance strain gauge testing technology at cryogenic temperatures.

Findings

The test results showed that CTE values of mortar and stone decreased with the decrease of temperature and CTE values of mortar was greater than that of stone from 0 °C to −165 °C. The ME values of mortar increased significantly at cryogenic temperatures, and less change in stone.

Originality/value

The material at cryogenic temperatures may continue to work in the elastic phase due to the continuous increase of elastic modulus. Therefore, the study of material in the elastic stage may be more important than in the ultimate bearing capacity stage, and it is necessary to carry out further study surrounding the deformation properties of materials at cryogenic temperatures. The CTE and ME values of mortar and stone from room temperature to cryogenic temperatures provide an experimental basis for the design of LNG storage tanks.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 18 December 2019

Peng Peng and Li Zhou

From the perspective of land mortgages, the purpose of this paper is to understand how farmers can be motivated to utilize environment-friendly formula fertilizers…

Abstract

Purpose

From the perspective of land mortgages, the purpose of this paper is to understand how farmers can be motivated to utilize environment-friendly formula fertilizers, thereby reducing the use of chemical fertilizers.

Design/methodology/approach

Two hypotheses are empirically tested using questionnaire responses from 714 farmers across three provinces in China to establish the relationship and to determine the role land rent plays.

Findings

This study finds that farmers who obtain land mortgages will be more willing to apply formula fertilizers in order to obtain higher value of their “own” land. This is because obtaining land mortgages can be considered as the process of titling land management rights. Farmers who have been transferred the land by verbal agreement no longer need to worry about losing it at any time. Hence, they are willing to apply formula fertilizers on their transferred land. Similarly, farmers who have been transferred the land by written contract to obtain more land mortgages will also be willing because the formula fertilizers can not only improve the quality of their transferred land, but also increase its value as collateral. This mechanism is clearer in the area where the average land rent is relatively lower.

Originality/value

No study has yet linked the reform of land mortgages to environmentally friendly behavior. While other studies have focused on the way access to credit changes farmer investments and spending, this particular relationship has not yet been formalized, giving this study theoretical and empirical significance.

Details

Agricultural Finance Review, vol. 81 no. 5
Type: Research Article
ISSN: 0002-1466

Keywords

Article
Publication date: 8 June 2021

Rocco Palumbo, Maria Vincenza Ciasullo, Massimiliano Matteo Pellegrini, Andrea Caputo and Mario Turco

Eco-museums safeguard the cultural authenticity and the historical identity of the place in which they operate. Conventional organizational models and management practices…

Abstract

Purpose

Eco-museums safeguard the cultural authenticity and the historical identity of the place in which they operate. Conventional organizational models and management practices are generally employed to achieve this institutional aim. Conversely, innovative solutions – such as digitization – are overlooked. Adopting a service quality management perspective, the article intends to examine the role of managerialization and professionalization in triggering eco-museums' digitization.

Design/methodology/approach

An empirical analysis involving 126 eco-museums operating in Italy as of 2018 was designed to investigate the implications of managerialization and professionalization on the eco-museums' propensity to embark on a digitization process. Two different forms of digitization were examined: (1) the presence of eco-museums in the digital environment; and (2) the exploitation of digital tools for service delivery. The mediating role of two “soft” total quality management (TQM) practices, i.e. people centredness and strategic focus on visitors' experience, was contemplated in the empirical analysis.

Findings

The research findings suggest that managerialization and professionalization have ambiguous effects on eco-museums' digitization. Nevertheless, they indirectly contribute to a greater digital presence of eco-museums and to a larger use of digital tools for service delivery through an increased use of soft TQM practices.

Research limitations/implications

Managerialization and professionalization are likely to foster the digital transition of eco-museums, which advances their ability to protect and promote the local cultural heritage. Soft TQM practices intended to achieve people-centredness and to enhance the visitors' experience should be exploited to stimulate the eco-museums' digitization.

Originality/value

The article examines the triggers of eco-museums' digitization, providing some food for thought to scholars and practitioners.

Details

The TQM Journal, vol. 34 no. 3
Type: Research Article
ISSN: 1754-2731

Keywords

Article
Publication date: 31 March 2021

Mei Sha, Theo Notteboom, Tao Zhang, Xin Zhou and Tianbao Qin

This paper presents a generic simulation model to determine the equipment mix (quay, yard and intra-terminal transfer) for a Container Terminal Logistics Operations System…

Abstract

This paper presents a generic simulation model to determine the equipment mix (quay, yard and intra-terminal transfer) for a Container Terminal Logistics Operations System (CTLOS). The simulation model for the CTLOS, a typical type of discrete event dynamic system (DEDS), consists of three sub-models: ship queue, loading-unloading operations and yard-gate operations. The simulation model is empirically applied to phase 1 of the Yangshan Deep Water Port in Shanghai. This study considers different scenarios in terms of container throughput levels, equipment utilization rates, and operational bottlenecks, and presents a sensitivity analysis to evaluate and choose reasonable equipment ratio ranges under different operational conditions.

Details

Journal of International Logistics and Trade, vol. 19 no. 1
Type: Research Article
ISSN: 1738-2122

Keywords

Article
Publication date: 31 December 2015

Rene Dentiste Mueller, George Xun Wang, Guoli Liu and Charles Chi Cui

Marketing research has focussed more on in-group favoritism and out-group derogation (i.e. ethnocentrism) than out-group favoritism and in-group derogation (i.e…

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Abstract

Purpose

Marketing research has focussed more on in-group favoritism and out-group derogation (i.e. ethnocentrism) than out-group favoritism and in-group derogation (i.e. xenocentrism). The purpose of this paper is to explore the xenocentric behavior in the consumer sphere to explain why some consumers have a bias for foreign products even when domestic ones are qualitatively similar or better. As the Chinese economy has experienced more than three decades of near double-digit growth and increased openness to foreign products, it is important to examine phenomena related to the formation of Chinese attitudes toward foreign products with the rising tensions between the seemingly irreversible globalization and Chinese re-awakening nationalism.

Design/methodology/approach

This study is based on a review of the extant literature and focus groups in three cities in China.

Findings

This study has found that consumer xenocentrism (CX) is prevalent in China, especially among the new emerging wealthy classes, younger consumers, and the local elite. It appears that Chinese consumers are psychologically or sociologically orientated or predisposed toward foreign (Western) goods. The findings from this study suggest that both consumer ethnocentrism and CX are possible or even expected. The short review of Chinese history presented here has shown that these phenomena can be explained by traditional in-group/out-group theories. Specifically, when there are too many xenocentrics, national esteem is threatened and this prompts many individuals to become more ethnocentric.

Research limitations/implications

This study is based on the literature and focus groups data, hence, the findings are not intended to be generalizable.

Practical implications

The findings from this study should be of interest to business practitioners and policy makers.

Social implications

The historical and cultural perspectives taken in this study indicate that understanding consumers’ xenocentric behavior entails knowledge and deep understanding of how cultural values and contemporary social-political forces interplay within consumers’ formation and change of attitudes toward the choice of domestic and foreign products.

Originality/value

This study shows that the ability of foreign products to meet the individual’s need or enhance his/her self-esteem more so than domestic products is indicative of something more than simply an international, cosmopolitan, or modern orientation. The fact that consumer foreign bias is found with both mundane and widely available products, expensive and inexpensive products, and conspicuous and non-conspicuous goods challenges the assumption that this phenomenon is simply traditional prestige-consumption behavior. Future research needs to be directed at measuring the CX construct and examine potential antecedents of such a behavior.

Details

Asia Pacific Journal of Marketing and Logistics, vol. 28 no. 1
Type: Research Article
ISSN: 1355-5855

Keywords

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