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Article
Publication date: 1 September 2017

Xuhui Wang, Kewei Liu, Kai Wang, Jian Gong, Yanjun Wang and Yajiang Fan

Urban parks play a key role in recreational activities, public health, and ecosystem services in urban areas. Using GIS and Fragstats, this study investigated the…

Abstract

Urban parks play a key role in recreational activities, public health, and ecosystem services in urban areas. Using GIS and Fragstats, this study investigated the spatiotemporal dynamics of urban parks in Xi'an, China from 1949 to 2015 and the corresponding driving forces. The results show that the number and area of parks in Xi'an increased constantly during this period, especially from 2000 to 2015. Up to 2015, small green spaces, usually adjacent to streets, occupied the largest proportion among all types of parks. Archaeological parks were the largest in total area, but wetland parks were leading in average size of a single park. The density of parks was negatively correlated with their distance to the Clock Tower at the center of Xi'an. The dynamics of urban parks in highly urbanized areas were significantly different from that of their counterparts in suburban areas. Driving forces such as urban planning, urbanization and green space policies, and milestone events in the city's development jointly had a great effect on the distribution of parks in Xi'an. The research outcomes will support the upcoming Green Space Planning of Xi'an and benefit the pursuit of sustainability and human wellbeing.

Details

Open House International, vol. 42 no. 3
Type: Research Article
ISSN: 0168-2601

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Article
Publication date: 9 July 2020

Cizhi Wang, Giulia Flamini, Kai Wang, Rong Pei and Chiyin Chen

The purpose of this paper is to adopt a collective perspective in the study of entrepreneurial decision-making processes and empirically analyse the ways in which social…

Abstract

Purpose

The purpose of this paper is to adopt a collective perspective in the study of entrepreneurial decision-making processes and empirically analyse the ways in which social relationships between family members can shape their collective entrepreneurial decision-making behaviour (ED).

Design/methodology/approach

This paper considers the family social capital (FSC) in inducing overall conformity to the focal family member's decision to exploit an opportunity. In terms of the seminal construct of social capital, the authors propose three FSC dimensions that can be used to induce conformity: structural, relational and cognitive dimensions. Then, the authors design questionnaires to collect data pertaining to the relationships between the family members' ED and the FSC. Finally, the authors collect 152 valid questionnaires from Chinese family firms.

Findings

The data analysis consists of two parts. The first section of this paper analyses conformity by testing the discriminant validity of models. Regression analysis is then used to test the relationship between family members' ED and the FSC. Significant relationships between the cognitive dimension of FSC and the entrepreneur's decision-making are found.

Originality/value

The research contributes towards academic literature concerning both entrepreneurship and social capital. On the one hand, this paper is one of the rare pieces of entrepreneurial research that responds to the call for the study of entrepreneurship from a collective perspective. On the other hand, our study quantitatively tests the impact of FSC at a multidimensional level. It provides conclusions regarding the social influence of other family members and provides insights into social capital by studying entrepreneurship from a social/community perspective.

Details

Management Decision, vol. 59 no. 5
Type: Research Article
ISSN: 0025-1747

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Article
Publication date: 29 October 2019

Kai Wang, Massimiliano Matteo Pellegrini, Jiaan Xue and Cizhi Wang

Strategic change is integral to the survival and development of firms. The purpose of this paper is to analyze the impact of environmental uncertainty on a firm’s…

Abstract

Purpose

Strategic change is integral to the survival and development of firms. The purpose of this paper is to analyze the impact of environmental uncertainty on a firm’s strategic change and further demonstrates the moderating role of political connection and family ownership on the relationship between environmental uncertainty and a firm’s strategic change.

Design/methodology/approach

This paper uses the population sample of Chinese firms listed on the Shenzhen Stock Exchange and the Shanghai Stock Exchange from 2008 to 2014 and quantitatively tests hypotheses through correlation analysis, regression analysis and other methods.

Findings

Environmental uncertainty has a positive effect on the degree of strategic changes made. Political connection and family ownership negatively moderate the impact of the two dimensions of environmental uncertainty (environmental dynamism and environmental munificence) on strategic changes.

Originality/value

Conclusions enrich the research of other studies on firms’ strategic changes. From an open systems perspective, this paper reveals the influences of external environmental factors on firms’ strategic changes. In addition to this, in analyzing the ways in which environmental uncertainty affects a firm’s strategic change, the research expands the application scope of information processing theory and resource-based view. This paper also provides significant practical observations on firms’ strategic decision making in this area.

Details

Journal of Family Business Management, vol. 10 no. 4
Type: Research Article
ISSN: 2043-6238

Keywords

Content available
Article
Publication date: 30 June 2016

Kai Wang, Shuaian Wang, Lu Zhen and Xiaobo Qu

This paper aims to conduct a review on cruise shipping and the cruise shipping industry. The current trends are analyzed for the industry, showing that this industry is…

Abstract

Purpose

This paper aims to conduct a review on cruise shipping and the cruise shipping industry. The current trends are analyzed for the industry, showing that this industry is still young and has great potential to boom. Meanwhile, the Asia market is the fastest growth region among the global, to which increasing cruise ships are repositioned by major cruise lines. However, for such a promising industry, the literature review on some state-of-the-art research works suggests that the research works that have been conducted for the cruise shipping are quite limited, and the majority of the works belongs to empirical and descriptive studies, which does not provide optimization-based quantitative analysis on some operation planning problems.

Design/methodology/approach

This paper conducts a review on cruise shipping and the cruise shipping industry.

Findings

In reality, there are some important operation planning problems faced by cruise lines or cruise ships, and four of them are addressed in this paper in response to the fast growing trend. The addressed operation planning problems are cruise fleet management, cruise ship deployment, cruise itinerary design and cruise service planning.

Originality/value

The importance and the attention for the research on the problems are also elaborated in the paper.

Details

Maritime Business Review, vol. 1 no. 2
Type: Research Article
ISSN: 2397-3757

Keywords

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Article
Publication date: 10 August 2020

Yongzhen Ke, Wenjie Zhao, Shuai Yang, Kai Wang and Jiaying Liu

This paper aims to obtain a texture dental model with real images and improve the rendering effect of the dental model.

Abstract

Purpose

This paper aims to obtain a texture dental model with real images and improve the rendering effect of the dental model.

Design/methodology/approach

The paper proposes a semiautomatic method to construct a realistic dental model with real images based on two-dimensional/three-dimensional (2D/3D) registration. First, a 3D digital dental model and three intraoral images are obtained by a 3D scanner and digital single-lens reflex camera. Second, the camera projection poses for every intraoral images are calculated by using the single-objective optimization algorithm. Third, with camera poses, the preliminary projection texture mapping is performed; besides, the seam between two textures is marked. Finally, the marked regions are fused based on the image pyramid to eliminate obvious seams.

Findings

The paper provides a method to construct a realistic dental model. The method can map three intraoral images to the dental model. The experimental results show that the textured dental model without obvious distortion, dislocation and seams is constructed with simple interactions.

Originality/value

The proposed method can be applied to the digital smile design system to improve the communication efficiency between doctors, patients and technicians.

Details

Engineering Computations, vol. 38 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 2 January 2018

Wenju Yan, Hao Chen, Lei Chen and Kai Wang

This paper aims to establish a modified variable coefficient calculation model to analyse the control parameter effect on the iron loss of switched reluctance motor under…

Abstract

Purpose

This paper aims to establish a modified variable coefficient calculation model to analyse the control parameter effect on the iron loss of switched reluctance motor under pulse width modulation (PWM) mode.

Design/methodology/approach

The finite element model is solved to get the flux density by python language. Due to non-sinusoidal flux density feature and the effect of PWM excitation, the Fourier transform is applied in consideration of harmonic components. To improve the accuracy of iron loss computation, the effect of minor loops is considered by using the rain-flow counting method.

Findings

When the speed fluctuates around the set speed and the fluctuations are relatively small, it is useful to reduce the iron loss with smaller duty ratio and turn-on angle or greater duty ratio and smaller turn-off angle. The iron loss is less affected by chopping frequency, while the iron loss increases obviously with higher conduction angles. The iron loss under non-energy-returnable-voltage-chop mode is greater than energy-returnable-voltage-chop mode.

Originality/value

The modified variable coefficient MIEM5 iron loss model is proposed to improve the accuracy of iron loss calculation. Then the control parameters such as duty ratio, chopping frequency, turn on angle and turn off angle are analysed under PWM mode.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 1
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 4 December 2018

Wenju Yan, Hao Chen, Tong Xu and Kai Wang

An improved simulation model of switched reluctance motor (SRM) for steady-state operation that considers the core losses in the stator and rotor is established to obtain…

Abstract

Purpose

An improved simulation model of switched reluctance motor (SRM) for steady-state operation that considers the core losses in the stator and rotor is established to obtain the steady performance of the high-speed SRM during the design, analysis and control of SRM driving system more accurately.

Design/methodology/approach

The transient core loss model for the material and SRM is presented. Then a new method for calculating the flux density of the motor in real time is introduced, and a steady-state simulation model of the SRM including real-time transient core losses calculation model is established according to the transient flux density. Because the transient core losses calculated by above method are the total core losses of the motor, a core losses distribution method is proposed and the steady-state simulation model of the SRM including the distributed core losses’ effect on the phase winding is established.

Findings

The comparison results show that the proposed model has higher accuracy than the traditional model, excluding core losses, especially at the moments when phase voltage is turn-on and turn-off. The proportion of the core losses to the motor losses increases with the increase in speed. So, the core losses’ effect on the steady-state performance of the high-speed SRM cannot be ignored.

Originality/value

The method to obtain flux density in the real time is presented and the improved steady-state simulation model of SRM that considering transient core losses is proposed.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 38 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 1 December 2020

Kai Wang, Ying Wang, Yun Ma and Sutian Xu

Big science has become a new normative standard in transforming science policy with the interdisciplinary research (IDR) pattern serving as an organizational strategy in…

Abstract

Purpose

Big science has become a new normative standard in transforming science policy with the interdisciplinary research (IDR) pattern serving as an organizational strategy in scientific inquiries. This paper aims to show how policy-making is organized in the real situation of the R&D sectors for this trend.

Design/methodology/approach

Cultural theory and new institutionalism are tinkered for a close examination of the ways in which IDR has been enacted and implemented in BGI Group, an exemplar of big science and leading biotechnology research facility in China, by interrogating institutional cultures in the context of big science projects, whilst investigating how IDR is evolved against the specific social process of interaction.

Findings

The findings include that the IDR has profoundly influenced how scientific knowledge is produced, the social interactions between stakeholders and the innovation of research policy within the network of China’s biotechnology industry.

Originality/value

Advances in biotechnology and related fields are redrafting China’s hi-tech industry development and governance landscape. This is the first empirical study of innovation in R&D management for big science project as presented by the IDR pattern in the BGI. It makes an important contribution to the understanding of both the nature of China’s biotechnology industry governance practices and the culture of scientific innovation within which the IDR mediates social interactions and thereby the policy-making process.

Details

International Journal of Innovation Science, vol. 12 no. 5
Type: Research Article
ISSN: 1757-2223

Keywords

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Article
Publication date: 17 August 2020

Ying An, Xiaomin Sun, Kai Wang, Huijie Shi, Zhenzhen Liu, Yiming Zhu and Fang Luo

Why do some employees choose to prolong their working hours excessively? The current study tested how core self-evaluations (CSEs) might lead to workaholism and how…

Abstract

Purpose

Why do some employees choose to prolong their working hours excessively? The current study tested how core self-evaluations (CSEs) might lead to workaholism and how perceived job demands might mediate this relationship.

Design/methodology/approach

Insights from the extant literature underpin the hypotheses on how CSEs would affect the development of workaholism through perceived job demands. A sample of 421 working people in China completed the online surveys, and the mediation model was tested using Mplus 7.0 (Muthén and Muthén, 1998–2012).

Findings

This study found that different components of CSEs influence workaholism in different ways. Specifically, generalized self-efficacy positively predicts workaholism, whereas emotional stability negatively predicts workaholism. Moreover, most aspects of CSEs (generalized self-efficacy, emotional stability and locus of control) influence workaholism via perceived job demands, specifically via perceived workload but not via perceived job insecurity.

Originality/value

The current study is the first to explore how individuals' fundamental evaluations of themselves (i.e. CSEs) relate to workaholism. The results are helpful for the prevention and intervention of workaholism in organizations.

Details

Personnel Review, vol. 50 no. 1
Type: Research Article
ISSN: 0048-3486

Keywords

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Article
Publication date: 4 September 2018

Lufeng Zhang and Kai Wang

The purpose of this paper is to investigate the electromagnetic performances of the permanent magnet linear synchronous machines (PMLSM) with sine and third harmonic (SIN…

Abstract

Purpose

The purpose of this paper is to investigate the electromagnetic performances of the permanent magnet linear synchronous machines (PMLSM) with sine and third harmonic (SIN + 3rd) shaping mover in comparison with the PMLSM with sine (SIN) shaping mover and conventional shaping mover.

Design/methodology/approach

The optimal amplitude of the injected third harmonic to re-shape the SIN + 3rd shaping permanent magnet (PM) for maximizing the thrust force is analytically derived and confirmed by finite element method (FEM). Furthermore, the PM edge thickness, the pole arc to pole pitch ratio and the tooth to slot ratio are optimized. It is found that the optimal amplitude of the injected third harmonic is one-sixth of the fundamental one, the optimal PM edge thickness, the pole arc to pole pitch ratio and the tooth to slot ratio are 0, 0.85 and 0.5 mm, respectively. In addition, the electromagnetic performances are analyzed and quantitatively compared for the PMLSM with SIN + 3rd shaping mover, SIN shaping mover and conventional shaping mover.

Findings

The average thrust force and efficiency of the PMLSM with SIN + 3rd shaping mover are improved significantly, while the thrust ripple is not increased, comparing to those of the PMLSM with SIN shaping mover. Meanwhile, the thrust ripple is lower than that of the conventional shaping mover.

Research limitations/implications

The purely sinusoidal currents are applied in this analysis and the influences of harmonics in the current on electromagnetic performances are not considered.

Originality/value

This paper presents a PMLSM with SIN + 3rd shaping mover to improve the thrust force and efficiency without increasing the thrust ripple, considering the effects of the amplitude of the injected third harmonic to re-shape the SIN + 3rd shaping PM, the PM edge thickness, the pole arc to pole pitch ratio and the tooth to slot ratio.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 6
Type: Research Article
ISSN: 0332-1649

Keywords

1 – 10 of 691