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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.

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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

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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 compaction…

329

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

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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 experimental basis…

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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

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Article
Publication date: 25 May 2022

Yee Sye Lee, Ali Rashidi, Amin Talei, Mehrdad Arashpour and Farzad Pour Rahimian

In recent years, deep learning and extended reality (XR) technologies have gained popularity in the built environment, especially in construction engineering and management. A…

814

Abstract

Purpose

In recent years, deep learning and extended reality (XR) technologies have gained popularity in the built environment, especially in construction engineering and management. A significant amount of research efforts has been thus dedicated to the automation of construction-related activities and visualization of the construction process. The purpose of this study is to investigate potential research opportunities in the integration of deep learning and XR technologies in construction engineering and management.

Design/methodology/approach

This study presents a literature review of 164 research articles published in Scopus from 2006 to 2021, based on strict data acquisition criteria. A mixed review method, consisting of a scientometric analysis and systematic review, is conducted in this study to identify research gaps and propose future research directions.

Findings

The proposed research directions can be categorized into four areas, including realism of training simulations; integration of visual and audio-based classification; automated hazard detection in head-mounted displays (HMDs); and context awareness in HMDs.

Originality/value

This study contributes to the body of knowledge by identifying the necessity of integrating deep learning and XR technologies in facilitating the construction engineering and management process.

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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, thereby…

205

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

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Article
Publication date: 28 June 2011

Bengi Aygün and Vehbi Cagri Gungor

The purpose of this paper is to provide a contemporary look at the current state‐of‐the‐art in wireless sensor networks (WSNs) for structure health monitoring (SHM) applications…

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Abstract

Purpose

The purpose of this paper is to provide a contemporary look at the current state‐of‐the‐art in wireless sensor networks (WSNs) for structure health monitoring (SHM) applications and discuss the still‐open research issues in this field and, hence, to make the decision‐making process more effective and direct.

Design/methodology/approach

This paper presents a comprehensive review of WSNs for SHM. It also introduces research challenges, opportunities, existing and potential applications. Network architecture and the state‐of‐the‐art wireless sensor communication technologies and standards are explained. Hardware and software of the existing systems are also clarified.

Findings

Existing applications and systems are presented along with their advantages and disadvantages. A comparison landscape and open research issues are also presented.

Originality/value

The paper presents a comprehensive and recent review of WSN systems for SHM applications along with open research issues.

Details

Sensor Review, vol. 31 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

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Article
Publication date: 23 January 2025

Lakshmi Devaraj, Thaarini S., Athish R.R. and Vallimanalan Ashokan

This study aims to provide a comprehensive overview of thin-film temperature sensors (TTS), focusing on the interplay between material properties and fabrication techniques. It…

14

Abstract

Purpose

This study aims to provide a comprehensive overview of thin-film temperature sensors (TTS), focusing on the interplay between material properties and fabrication techniques. It evaluates the current state of the art, addressing both low- and high-temperature sensors, and explores the potential applications across various fields. The study also identifies challenges and highlights emerging trends that may shape the future of this technology.

Design/methodology/approach

This study systematically examines existing literature on TTS, categorizing the materials and fabrication methods used. The study compares the performance metrics of different materials, addresses the challenges encountered in thin-film sensors and reviews the case studies to identify successful applications. Emerging trends and future directions are also analyzed.

Findings

This study finds that TTS are integral to various advanced technologies, particularly in high-performance and specialized applications. However, their development is constrained by challenges such as limited operational range, material degradation, fabrication complexities and long-term stability. The integration of nanostructured materials and the advancement of wireless, self-powered and multifunctional sensors are poised to drive significant advancements in this field.

Originality/value

This study offers a unique perspective by bridging the gap between material science and application engineering in TTS. By critically analyzing both established and emerging technologies, the study provides valuable insights into the current state of the field and proposes pathways for future innovation in terms of interdisciplinary approaches. The focus on emerging trends and multifunctional applications sets this review apart from existing literature.

Details

Sensor Review, vol. 45 no. 2
Type: Research Article
ISSN: 0260-2288

Keywords

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Article
Publication date: 25 October 2024

Xinxin Xu

Village-level archives are the most basic construction unit of rural archives in China, yet the village-level archival work is the most poorly delivered. However, the evolution of…

23

Abstract

Purpose

Village-level archives are the most basic construction unit of rural archives in China, yet the village-level archival work is the most poorly delivered. However, the evolution of the laws and rules on village-level archival work in recent years signal that Chinese village-level archival work has stepped into a new era. In this context, this article aims to review the detailed history of village-level archival legislation, examine the legislation’ implementation effect and discuss the existing problems with a view to providing improvement measures.

Design/methodology/approach

A historical research method is used to review the legislation’ history, and the analysis involving the implementation effect is mainly based on literature of two kinds, which are investigation reports on sample villages’ archival work carried out by scholars, and summary reports and work schemes on national or local village-level archival work given by the archival management or administrative management departments at various level.

Findings

At first, China only issued non-legal administrative orders toward village-level archival work. Later, some regions issued local rules, and finally the national rules and even Archives Law with relevant provisions were promulgated. However, their implementation faced two fundamental problems; firstly the insufficient endogenous demand for archival work in some villages, and secondly the mechanism problem involving village level archives management. The countermeasures are also discussed building on these two points.

Originality/value

This is the first article to systematically combine a review of the history of Chinese village-level archival legislation and in addition to examine their implementation effect including analyzing the existing problems from the macro level.

Details

Records Management Journal, vol. 34 no. 2/3
Type: Research Article
ISSN: 0956-5698

Keywords

Available. Open Access. Open Access

Abstract

Details

Journal of Intelligent Manufacturing and Special Equipment, vol. 4 no. 1
Type: Research Article
ISSN: 2633-6596

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