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Article
Publication date: 7 April 2022

Linhai Zhu, Liu Jinfu, Yujia Ma, Mingliang Bai, Weixing Zhou and Daren Yu

This paper aims to establish a multi-input equilibrium manifold expansion (EME) model for gas turbine (GT). It proposes that the extension of model input dimension is realized…

Abstract

Purpose

This paper aims to establish a multi-input equilibrium manifold expansion (EME) model for gas turbine (GT). It proposes that the extension of model input dimension is realized based on similarity theory and affine structure in the framework of single-input EME model. The study aims to expand the scope of application of the EME model so that it can be used for the control or fault diagnosis of GTs.

Design/methodology/approach

In this paper, the concepts of corrected equilibrium manifold expansion (CEME) model and multi-cell equilibrium manifold expansion (MEME) model are first proposed. This paper uses theoretical analysis and simulation experiments to demonstrate the effectiveness of the bilayer equilibrium manifold expansion (BEME) model, which is a combination of the CEME and the MEME models. Simulation experiments include confirmatory experiments and comparative experiments.

Findings

The paper provides a new sight into building a multiple-input EME (MI-EME) model for GTs. The proposed method can build an accurate and robust MI-EME model that has superior performance compared with widely used nonlinear models including Wiener model (WM), Hammerstein model (HM), Hammerstein–Wiener model (HWM) and nonlinear autoregressive with exogenous inputs (NARX) network model. In terms of accuracy, the maximum error percentage of the proposed model is just 1.309%, far less than WM, HM and HWM. In terms of the stability of model calculation, the range of the mean error percentage of the proposed model is just a quarter of that of NARX network model.

Originality/value

The paper fulfills the construction of a novel multi-input nonlinear model, which has laid a foundation for the follow-up research of model-based GT fault detection and isolation or GT control.

Details

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

Keywords

Article
Publication date: 13 November 2020

Fang Chen, Weixing Yao and Wen Jiang

The purpose of this paper is to synthetically investigate the impact damage responses of carbon fiber reinforced polymer (CFRP) and its influence on the compression mechanical…

Abstract

Purpose

The purpose of this paper is to synthetically investigate the impact damage responses of carbon fiber reinforced polymer (CFRP) and its influence on the compression mechanical responses of CFRP laminates, including damage distribution, residual compressive strength and fracture morphology.

Design/methodology/approach

A progressive damage simulation model is developed to analyze the complicated damage responses of CFRP laminates that are manufactured by resin transfer method (RTM) technology. Based on the ABAQUS/explicit finite element analysis solver, a VUMAT code is proposed to descript the composite materials’ damage behaviors under both impact and compression load. Adopting this proposed model, the primary mechanical indicators of four groups’ 5284RTM/U3160 CFRP laminates with different stacking sequences are predicted. Moreover, impact and compression after impact tests are conducted to verify the accuracy of simulation results.

Findings

Both simulation and experimental results show that the impact damage with low visible detectability can significantly reduce composites’ compressive strength. For all four groups’ composite laminates, the residual strength ratio is around 35% or even lower. The kernel impact damage near the plates’ geometric center promotes the degradation process of local materials and finally leads to the early occurrence of mechanical fracture. In addition, the impact damage projection area is not sensitive to the parameters of stacking sequences, while the residual compression strength is proportional to the number of 0-degree layers within whole laminates.

Originality/value

This study helps to understand the effect of an impact event on CFRP laminates’ compressive bearing capacity and provides a numerical method in simulating the damage responses under both impact and compression load.

Details

Engineering Computations, vol. 38 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 14 July 2020

Xianmiao Li, William X. Wei, Weiwei Huo, Yi Huang, Manyi Zheng and Jinyi Yan

This study aims to build a research model from the perspectives of knowledge hiding and idea implementation to examine what factors influence idea implementation and the…

Abstract

Purpose

This study aims to build a research model from the perspectives of knowledge hiding and idea implementation to examine what factors influence idea implementation and the cross-level moderating role of team territory climate.

Design/methodology/approach

Data were collected from universities, 52 (R&D) teams in China via a two-wave survey. The final sample contained 209 team members and their immediate supervisors. Hierarchical linear modeling was used to test hypotheses.

Findings

The results indicated that individuals’ knowledge-hiding behavior had a significantly negative impact on idea implementation and creative process engagement, which played a mediating role. Team territorial climate played a cross-level moderating role between knowledge hiding and idea implementation. If team territorial climate was at a high level, then the negative connection between knowledge hiding and idea implementation would be weaker.

Research limitations/implications

Under the perspective of territorial behavior in Chinese cultural, it can help to distinguish territorial behavior and be preventive at individual and team levels. This study not only enables managers to clearly understand the precipitating factors of idea implementation but also provides constructive strategies for alleviating the negative effects of knowledge territoriality on creative process engagement and idea implementation.

Originality/value

This study constructs a cross-level model to explore the relationship among knowledge hiding, creative process engagement and idea implementation at individual and team levels in the context of Chinese R&D enterprises. Additionally, the study analyzes the influence of territoriality on idea implementation under boundary conditions.

Details

International Journal of Emerging Markets, vol. 16 no. 8
Type: Research Article
ISSN: 1746-8809

Keywords

Article
Publication date: 18 January 2016

Jun Ni, Jifei Dong, Jingchao Zhang, Fangrong Pang, Weixing Cao and Yan Zhu

– The purpose of this paper is to improve the accuracy and signal-to-noise ratio (SN) of a crop nitrogen sensor.

Abstract

Purpose

The purpose of this paper is to improve the accuracy and signal-to-noise ratio (SN) of a crop nitrogen sensor.

Design/methodology/approach

The accuracy and wide adaptability of two spectral calibration methods for a crop nitrogen sensor based on standard reflectivity gray plates and standard detector, respectively, were compared.

Findings

The calibration method based on standard detector could significantly improve the measurement accuracy and the SN of this crop nitrogen sensor. When compared with the method based on standard gray plates, the measurement accuracy and the SN of the crop nitrogen sensor calibrated based on the standard detector method improved by 50 and 10 per cent, respectively.

Originality/value

This research analysed the calibration problems faced by the crop nitrogen sensor (type CGMD302) based on standard gray plates, and proposed a sensor calibration method based on a standard detector. Finally, the results of the two calibration methods were compared in terms of measurement accuracy and the SN of the crop nitrogen sensor.

Details

Sensor Review, vol. 36 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

Article
Publication date: 2 June 2021

Fernando Angulo-Ruiz, Albena Pergelova and William X. Wei

This research aims to assess variations of motivations when studying international location decisions. In particular, this study aims to assess the influence of diverse…

Abstract

Purpose

This research aims to assess variations of motivations when studying international location decisions. In particular, this study aims to assess the influence of diverse motivations – seeking technology, seeking brand assets, seeking markets, seeking resources and escaping institutional constraints – as determinants of the international location choice of emerging market multinational enterprises (EM MNEs) entering least developed, emerging, and developed countries.

Design/methodology/approach

The authors develop a set of hypotheses based on the ownership–location–internalization framework and complement it with an institutional perspective. The conceptual model posits that the different internationalization motivations (seeking technology, seeking brand assets, seeking markets, seeking resources and escaping institutional constraints) will impact the location choice of EM MNEs in developed economies, emerging markets or least developed countries. This study uses the 2013 survey data collected by the China Council for the Promotion of International Trade and the Asia Pacific Foundation of Canada. The final sample of analysis of this research includes 693 observations.

Findings

After controlling for several variables, two-stage Heckman regressions show there is a variation of motivations when EM MNEs enter least developed countries, emerging markets and developed economies. EM MNEs are motivated to enter least developed countries to seek markets and resources. Conversely, those firms enter developed countries in their search for technological assets and to escape institutional constraints at home. While the present study findings show a clear difference in the motivations that lead to location choice in least developed vs developed countries, the results are not as clear for location in other emerging countries.

Research limitations/implications

The paper offers empirical support for the importance of motivations as crucial determinants of location choice.

Originality/value

This paper provides a detailed quantitative study on the internationalization location choice of EM MNEs based on their motivations. Though theoretical models underscore the importance of motivations, we know very little about how, in practice, motivations drive location choice. This study contributes to the international location choice literature a deeper understanding of how diverse motivations drive choices of expansion into developed economies, emerging markets or least developed countries.

Article
Publication date: 7 December 2018

Fernando Angulo-Ruiz, Albena Pergelova and William X. Wei

The purpose of this paper is to focus on the differential impact of government promotional measures and government ownership on two internationalization variables: location and…

1334

Abstract

Purpose

The purpose of this paper is to focus on the differential impact of government promotional measures and government ownership on two internationalization variables: location and speed of internationalization of emerging market multinationals (EMNEs). Central to the authors’ study is the mediating role of strategic intents to internationalize. In particular, we study how government impacts the resource-seeking, market-seeking and technology-seeking motives to internationalize.

Design/methodology/approach

The empirical setting for the paper is Chinese companies that have internationalized via an equity based entry mode. The authors employ 672 firm responses collected by the Asia Pacific Foundation of Canada and the China Council for the Promotion of International Trade.

Findings

The empirical results demonstrate that different home government measures have differential impact on internationalization outcomes. Government promotional measures (such as direct incentives and bilateral agreements to support internationalization) have only an indirect effect on international location and speed through the effect they have on the strategic motives to internationalize; while government ownership in the company has a direct impact on international location.

Research limitations/implications

The study highlights that home governments are shaping EMNEs strategic intent. Home government can influence EMNEs internationalization choices by providing resource flows through financial resources and state ownership or through asset-accumulation mechanisms via promotional measures.

Practical implications

Policy makers in emerging markets need to develop policies focused on the specific motivations that firms have when internationalizing. EMNEs are suggested to take advantage of government policies more intentionally.

Originality/value

The theoretical contribution centers on identifying important mediating mechanisms pointing to the interplay between government policies and international location and speed of firms. The authors contribute to the growing stream of research on internationalization of emerging market firms by building a sound theoretical model and examining empirically the role of home government in the internationalization of EMNEs.

Details

International Journal of Emerging Markets, vol. 14 no. 1
Type: Research Article
ISSN: 1746-8809

Keywords

Article
Publication date: 1 April 2014

Xiao-Fu Pan, Qiwen Qin and Fei Gao

The purpose of this paper is to explore the effect of organizational psychological ownership (OPO) and organization-based self-esteem (OBSE) on positive organizational behaviors…

2295

Abstract

Purpose

The purpose of this paper is to explore the effect of organizational psychological ownership (OPO) and organization-based self-esteem (OBSE) on positive organizational behaviors (POBs).

Design/methodology/approach

Based on empirical survey, 2,566 employees from 45 production enterprises in China were surveyed by a self-designed questionnaire on OPO, OBSE and POB. Then, the methods of correlation analysis, multiple regressions, impact effect and path analysis were used to verify the research hypothesis.

Findings

The results showed that POB is positively related to OPO and OBSE, and that OPO and OBSE are positive predictors of POBs. The results also demonstrated that OBSE has partial mediating effects on OPO and POB. In particular, psychological ownership has a significant impact on each sub-factor of POB, while OBSE has a remarkable effect on the behavior of devotion and interpersonal harmony.

Research limitations/implications

This is a non-experimental field study and as such inferences about causality are limited, and there is a possibility that the results may be influenced by common method variance.

Practical implications

The findings of the present study reveal that to strengthen employees’ POBs, manager should enhance employees’ OPO and OBSE, and therefore the organizational performance and the individual efficacy will be improved.

Originality/value

This is the first research which studies the relationship among OPO, POB and OBSE under the background of China.

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