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Open Access
Article
Publication date: 18 March 2021

Suyi Mao, Guiming Xiao, Jaeyoung Lee, Ling Wang, Zijin Wang and Helai Huang

This study aims to investigate the safety effects of work zone advisory systems. The traditional system includes a dynamic message sign (DMS), whereas the advanced system includes…

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Abstract

Purpose

This study aims to investigate the safety effects of work zone advisory systems. The traditional system includes a dynamic message sign (DMS), whereas the advanced system includes an in-vehicle work zone warning application under the connected vehicle (CV) environment.

Design/methodology/approach

A comparative analysis was conducted based on the microsimulation experiments.

Findings

The results indicate that the CV-based warning system outperforms the DMS. From this study, the optimal distances of placing a DMS varies according to different traffic conditions. Nevertheless, negative influence of excessive distance DMS placed from the work zone would be more obvious when there is heavier traffic volume. Thus, it is recommended that the optimal distance DMS placed from the work zone should be shortened if there is a traffic congestion. It was also revealed that higher market penetration rate of CVs will lead to safer network under good traffic conditions.

Research limitations/implications

Because this study used only microsimulation, the results do not reflect the real-world drivers’ reactions to DMS and CV warning messages. A series of driving simulator experiments need to be conducted to capture the real driving behaviors so as to investigate the unresolved-related issues. Human machine interface needs be used to simulate the process of in-vehicle warning information delivery. The validation of the simulation model was not conducted because of the data limitation.

Practical implications

It suggests for the optimal DMS placement for improving the overall efficiency and safety under the CV environment.

Originality/value

A traffic network evaluation method considering both efficiency and safety is proposed by applying traffic simulation.

Open Access
Article
Publication date: 24 December 2021

Lishengsa Yue, Mohamed Abdel-Aty and Zijin Wang

This study aims to evaluate the influence of connected and autonomous vehicle (CAV) merging algorithms on the driver behavior of human-driven vehicles on the mainline.

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Abstract

Purpose

This study aims to evaluate the influence of connected and autonomous vehicle (CAV) merging algorithms on the driver behavior of human-driven vehicles on the mainline.

Design/methodology/approach

Previous studies designed their merging algorithms mostly based on either the simulation or the restricted field testing, which lacks consideration of realistic driving behaviors in the merging scenario. This study developed a multi-driver simulator system to embed realistic driving behavior in the validation of merging algorithms.

Findings

Four types of CAV merging algorithms were evaluated regarding their influences on driving safety and driving comfort of the mainline vehicle platoon. The results revealed significant variation of the algorithm influences. Specifically, the results show that the reference-trajectory-based merging algorithm may outperform the social-psychology-based merging algorithm which only considers the ramp vehicles.

Originality/value

To the best of the authors’ knowledge, this is the first time to evaluate a CAV control algorithm considering realistic driver interactions rather than by the simulation. To achieve the research purpose, a novel multi-driver driving simulator was developed, which enables multi-drivers to simultaneously interact with each other during a virtual driving test. The results are expected to have practical implications for further improvement of the CAV merging algorithm.

Details

Journal of Intelligent and Connected Vehicles, vol. 5 no. 1
Type: Research Article
ISSN: 2399-9802

Keywords

Article
Publication date: 29 January 2024

He Lu, Yuhou Wu, Zijin Liu, He Wang, Guangyu Yan, Xu Bai, Jiancheng Guo and Tongxiang Zheng

Preparing CrAlN coatings on the surface of silicon nitride bearings can improve their service life in oil-free lubrication. This paper aims to match the optimal process parameters…

Abstract

Purpose

Preparing CrAlN coatings on the surface of silicon nitride bearings can improve their service life in oil-free lubrication. This paper aims to match the optimal process parameters for preparing CrAlN coatings on silicon nitride surfaces, and reveal the microscopic mechanism of process parameter influence on coating wear resistance.

Design/methodology/approach

This study used molecular dynamics to analyze how process parameters affected the nucleation density, micromorphology, densification and internal stress of CrAlN coatings. An orthogonal test method was used to examine how deposition time, substrate temperature, nitrogen-argon flow rate and sputtering power impacted the wear resistance of CrAlN coatings under dry friction conditions.

Findings

Nucleation density, micromorphology, densification and internal stress have a significant influence on the surface morphology and wear resistance of CrAlN coatings. The process parameters for better wear resistance of the CrAlN coatings were at a deposition time of 120 min, a substrate temperature of 573 K, a nitrogen-argon flow rate of 1:1 and a sputtering power of 160 W.

Originality/value

Simulation analysis and experimental results of this paper can provide data to assist in setting process parameters for applying CrAlN coatings to silicon nitride bearings.

Details

Industrial Lubrication and Tribology, vol. 76 no. 2
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 December 2015

Hao Xu

Conservation of green space is crucial to the sustainable urban development of China. Nanjing is a central city in the Yangtze River Delta cluster in eastern China. Owing to…

Abstract

Conservation of green space is crucial to the sustainable urban development of China. Nanjing is a central city in the Yangtze River Delta cluster in eastern China. Owing to urbanization, the green spaces in this city have been affected significantly in terms of their scale and structure. Assessing such changes can provide a basis for environmental protection measures and sustainable development. Using Landsat remote-sensing image data from 1998 and 2007, we constructed a distribution map of the patches of green spaces in Nanjing, and analyzed and assessed the changes in scale and spatial layout of the green spaces using various landscape metrics including CA, PLAND, PD, MPS, LPI, NP, PD, TE, ED, MPI, and LSI. Coinciding with a sharp increase in urban population, the area of green spaces in Nanjing decreased by 27.06% between 1998 and 2007. The patches of green space increased by 39%, and the average area per patch decreased by about 47.52%. Green space patches were found to be unevenly distributed among the districts of Nanjing. In urban areas, significant numbers of such patches were found primarily in various types of parks, while in suburban areas, they were concentrated mainly in the hilly forestlands. Green spaces exhibited tendencies towards fragmentation, miniaturization, and discretization.

Details

Open House International, vol. 40 no. 4
Type: Research Article
ISSN: 0168-2601

Keywords

Article
Publication date: 31 January 2024

Dangshu Wang, Menghu Chang, Licong Zhao, Yuxuan Yang and Zhimin Guan

This study aims to regarding the application of traditional pulse frequency modulation control full-bridge LLC resonant converters in wide output voltage fields such as on-board…

Abstract

Purpose

This study aims to regarding the application of traditional pulse frequency modulation control full-bridge LLC resonant converters in wide output voltage fields such as on-board chargers, there are issues with wide frequency adjustment ranges and low conversion efficiency.

Design/methodology/approach

To address these issues, this paper proposes a fixed-frequency pulse width modulation (PWM) control strategy for a full-bridge LLC resonant converter, which adjusts the gain by adjusting the duty cycle of the switches. In the full-bridge LLC converter, the two switches of the lower bridge arm are controlled by a fixed-frequency and fixed duty cycle, with their switching frequency equal to the resonant frequency, whereas the two switches of the upper bridge arm are controlled by a fixed-frequency PWM to adjust the output voltage. The operation modes of the converter are analyzed in detail, and a mathematical model of the converter is established. The gain characteristics of the converter under the fixed-frequency PWM control strategy are deeply analyzed, and the conditions for implementing zero-voltage switching (ZVS) soft switching in the converter are also analyzed in detail. The use of fixed-frequency PWM control simplifies the design of resonant parameters, and the fixed-frequency control is conducive to the design of magnetic components.

Findings

According to the fixed-frequency PWM control strategy proposed in this paper, the correctness of the control strategy is verified through simulation and the development and testing of a 500-W experimental prototype. Test results show that the primary side switches of the converter achieve ZVS and the secondary side rectifier diodes achieve zero-current switching, effectively reducing the switching losses of the converter. In addition, the control strategy reduces the reactive circulating current of the converter, and the peak efficiency of the experimental prototype can reach 95.2%.

Originality/value

The feasibility of the fixed-frequency PWM control strategy was verified through experiments, which has significant implications for improving the efficiency of the converter and simplifying the design of resonant parameters and magnetic components in wide output voltage fields such as on-board chargers.

Details

Circuit World, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 28 February 2019

Changwei Pang, Qiong Wang, Yuan Li and Guang Duan

The purpose of this paper is to examine how business model innovation (BMI) mediates the relationship between integrative capability, business strategy and firm performance.

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Abstract

Purpose

The purpose of this paper is to examine how business model innovation (BMI) mediates the relationship between integrative capability, business strategy and firm performance.

Design/methodology/approach

A literature review provides the model and hypotheses. Using a sample of 165 Chinese firms, the authors conduct the examination using a theoretical model and hypotheses following standard analysis methods.

Findings

The results show that BMI positively mediates the relationship between integrative capability and firm performance. Moreover, a differentiation strategy positively moderates the link between BMI and firm performance, while a cost leadership strategy presents a significantly negative moderating effect.

Research limitations/implications

First, the authors test the hypotheses using data from China; thus data from other emerging economies should be tested. Second, the authors use cross-sectional data in this study making it impossible to verify the dynamic developed in the process of BMI; a longitudinal study could provide a more comprehensive understanding. Third, the authors consider one intermediate mechanism to test the relationship of integrative capability and firm performance; additional factors may link integrative capability and firm performance.

Practical implications

The mediating effect of BMI suggests managers should pay more attention to BMI to improve firm performance, and they should understand that BMI’s role varies across different business strategies.

Originality/value

The paper is original in its investigation of the effect of integrative capability and BMI on firm performance using data from China and demonstrates the mediating effect of BMI on the relationship between integrative capability and firm performance.

Details

European Journal of Innovation Management, vol. 22 no. 3
Type: Research Article
ISSN: 1460-1060

Keywords

Article
Publication date: 28 March 2022

Changwei Pang, Qiong Wang and Songqiang Wu

The purpose of this paper is to examine the underlying mediating mechanism and contextual conditions in the relationship between dynamic capabilities and novelty-centered business…

Abstract

Purpose

The purpose of this paper is to examine the underlying mediating mechanism and contextual conditions in the relationship between dynamic capabilities and novelty-centered business model design (NCBMD).

Design/methodology/approach

Using data from 146 firms in China and the process conditional modeling, the authors acquire evidence supporting the hypothesized moderated mediation.

Findings

The authors find that interfunctional coordination plays a crucial mediator role in the relationship between dynamic capabilities and NCBMD. Environmental dynamism positively moderates the mediating effect of interfunctional coordination on the relationship of dynamic capabilities and NCBMD.

Research limitations/implications

First, the research setting focuses on a specific intermediary mechanism of dynamic capabilities on NCBMD. Second, dynamic capabilities are considered as an integrative construct in the study. Future research could further examine the effect mechanism of dynamic capabilities' sub-dimensions, which might provide more theoretical findings. Third, the impact of public policies, an important source of environmental dynamism, on NCBMD needs a fine-grained analysis. Fourth, the sample data restricts the popularity of the conclusion.

Practical implications

First, firms should be aware of the irreplaceable role of dynamic capabilities in the process of designing a novel business model. Second, firms promoting the design of business models should pay more attention to interfunctional coordination. Third, the significant moderating mediation effect reveals that the importance of interfunctional coordination for the relationship between dynamic capabilities and NCBMD under a highly dynamic environment.

Originality/value

First, the authors reveal how a firm's dynamic capabilities can promote NCBMD. By focusing on the influence of dynamic capabilities on NCBMD, the authors elucidate the source of value creation from the perspective of organizational capability. Second, the analysis of mediating effect delineates the bridging mechanism of dynamic capabilities and NCBMD. These findings emphasize the important role of interfunctional coordination in designing a novel business model. Third, given the context of this research, the results present implications for the role of a dynamic environment. For the methodology of theoretical research, the different findings indicate that scholars could further refine the manipulation of moderators, which contributes to elucidate new conclusions ignored in the past studies. Accordingly, this research extends both theoretical research and methodology.

Details

European Journal of Innovation Management, vol. 26 no. 5
Type: Research Article
ISSN: 1460-1060

Keywords

Book part
Publication date: 10 July 2019

Marilena Chrysanthakopoulou

The Belt and Road Initiative (BRI) is endeavor of paramount importance that is likely to redefine socio-economic relations in countries and regions concerned. The debate on BRI’s…

Abstract

The Belt and Road Initiative (BRI) is endeavor of paramount importance that is likely to redefine socio-economic relations in countries and regions concerned. The debate on BRI’s relevance, scope, and potential has only begun, and it remains uncertain how exactly it will unfold. In this context, questions pertinent to regulatory frameworks in the context of which BRI initiatives are implemented belong to the most complex and the most interesting ones. Due to BRI’s novelty and open-endedness, all matters pertaining to its implementation are of exploratory nature; especially the legal aspects of its implementation. This aim of this chapter is to provide insightful answers to legal questions regarding BRI and dispute resolution via the examination of the current legal status of BRI, as well as explore how trust and cultural awareness can contribute to the avoidance of business-related disputes.

Details

The New Silk Road Leads through the Arab Peninsula: Mastering Global Business and Innovation
Type: Book
ISBN: 978-1-78756-680-4

Book part
Publication date: 30 November 2020

Wang Hong and Ding Shuai

In recent years, especially after the 2008 global financial crisis, the global economic recovery has been struggling. The trend of anti-globalization with populism and…

Abstract

In recent years, especially after the 2008 global financial crisis, the global economic recovery has been struggling. The trend of anti-globalization with populism and protectionism around the world is on the rise. As the largest developing country, China will engage in promoting global economic integration for common development of the world to promote the sustainable development and globalization. This paper will focus on the global operations of Chinese MNCs and explore their social responsibility to go global under the B&R Initiative, study their performance of social responsibility, analyze the potential risks and put forward countermeasures. Based on the report of the Top 100 Chinese MNCs released by China Entrepreneurs Association in 2016, we select 35 corporations related to the B&R, use their comparatively complete data and conduct a statistical analysis of their CSR data. To study the economic, social and environmental performance of CSR and sustainable development, we focus on three major indicators, including employee, environment and the public. Data from 2012 to 2016 are considered, for a total of five years. Through the analysis of CSR data, this paper points the social responsibility development status of major Chinese MNCs under the B&R Initiative and reveals some problems and risks that still exist in the fulfillment of social responsibility. In response to these issues, we make analysis from the perspective of stakeholders, so as to provide ideas for the development of social responsibility of the related corporations. At the initial stage of China's initiative of the Belt and Road, it is a new attempt to launch a research on the social responsibility of Chinese MNCs. Traditionally, research on CSR tends to make horizontal comparison of corporations in different countries and focuses on a certain year. Based on the traditional research and differ from them, we extend the time interval of research beyond a certain year and adopt the trend analysis to CSR data. In addition, case introduction is also used. According to the stakeholder theory and the comprehensiveness of the data, the research is focused on three main aspects, namely, employee, environment and the public. And, we have made a relative conversion of these indicators. These thoughts can examine the social responsibility development of related corporations in a given period and help promote the B&R Initiative.

Details

CSR in an age of Isolationism
Type: Book
ISBN: 978-1-80043-268-0

Keywords

Article
Publication date: 27 September 2022

Longyue Ding and Yingbo Xu

The purpose of this paper is to analyze the mechanism of the role of government subsidies on corporate environmental investment and explore how specific characteristics of firms…

Abstract

Purpose

The purpose of this paper is to analyze the mechanism of the role of government subsidies on corporate environmental investment and explore how specific characteristics of firms affect corporate environmental responsibility.

Design/methodology/approach

This paper examines the relationship between government subsidies and corporate environmental investment and models with a sample of 78,854 industries. The authors measure the corporate environmental investment by the natural logarithm of the volume of waste gas treatment facilities.

Findings

The results show the positive effect of government subsidies on corporate environmental investment. In addition, state ownership positively regulates the relationship between government and corporations, but the relationship between them is negatively regulated by the slack resources.

Practical implications

When people are increasingly concerned about corporate social and environmental responsibility, clarifying the link between government subsidies and corporate environmental investments can help policymakers formulate policies and allocate limited resources.

Originality/value

This study uses the resource-based view as a theoretical framework to reveal the mechanism of action between government subsidies and corporate environmental responsibility, enriching the previous literature that explores the issue based on the legitimacy perspective.

Details

Kybernetes, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0368-492X

Keywords

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