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Article
Publication date: 18 March 2022

Zihao Chen, Weiping Zhang, Jiawang Mou and Kexin Zheng

Vertical take-off is commonly adopted in most insect-mimicking flapping-wing micro air vehicles (FMAV) while insects also adopt horizontal take-off from the ground. The purpose of…

Abstract

Purpose

Vertical take-off is commonly adopted in most insect-mimicking flapping-wing micro air vehicles (FMAV) while insects also adopt horizontal take-off from the ground. The purpose of this paper is to study how insects adjust their attitude in such a short time during horizontal take-off by means of designing and testing an FMAV based on stroke plane modulation.

Design/methodology/approach

An FMAV prototype based on stroke plane rotating modulation is built to test the flight performance during horizontal take-off. Dynamic gain and decoupling mixer is added to compensate for the nonlinearity during the rotation angle of the stroke plane getting too large at the beginning of take-off. Force/torque test based on a six-axis sensor validates the change of aerodynamic force and torque at different rotation angles. High-speed camera and motion capture system test the flight performance of horizontal take-off.

Findings

Stroke plane modulation can provide a great initial pitch toque for FMAV to realize horizontal take-off. But the large range of rotation angles causes nonlinearity and coupling of roll and yaw. A dynamic gain and a mixer are added in the controller, and the FMAV successfully achieves horizontally taking off in less than 1 s.

Originality/value

The research in this paper shows stroke plane modulation is suitable for insect’s horizontal take-off

Details

Aircraft Engineering and Aerospace Technology, vol. 94 no. 7
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 2 April 2015

R.K. Srivastava

The purpose of this paper is to study differing demographic factors affecting fast-food customers loyalty towards national or international fast food chains. It also compares the…

6521

Abstract

Purpose

The purpose of this paper is to study differing demographic factors affecting fast-food customers loyalty towards national or international fast food chains. It also compares the variation between global and local fast food chains as the products offered are culturally different.

Design/methodology/approach

A variety of variables used to gain a holistic view, which includes factors such as quality, price, food and demographic profile of consumers affecting loyalty of fast food chains. The study adopts the theory and method of the trust-commitment-loyalty explanation chain and examines the consumer survey adapted from Fast food by Sahagun et al. (2014). The present analyses 542 filled questionnaires in which systematic sampling is used. Systematic sampling procedure is adopted.

Findings

Indians prefer global fast food chains compared to Indian fast food chains. Loyalty towards global brands is higher than that for Indian brands because they are found to be of better quality which leads to higher frequency of visit and recommendation of the brands to their friends and colleagues. There are ethnic variations towards global and Indian fast food chains. Global brand of food chains generated more good word of mouth publicity compared to Indian food chains. Demographic factors play a role in the patronage of fast food chains.

Research limitations/implications

One of the limitations of this research is the study adapts the theory and method of the trust-commitment-loyalty explanation chain and examines the consumer survey adapted from a study of Sahagun et al. (2014) on fast food for emerging markets. Only India is studied, but the addition of other countries like Brazil, China, Russia and South Africa can add value.

Practical implications

Fast food managers had to illustrate the satisfaction on affective response, such as quality of food, convenient location, variety, service and value for money. Demographic variables like gender, age, education, income and ethnicity, global and local Brand will affect the perceptions.

Originality/value

This is the first attempt to study the loyalty of consumers in emerging markets, which is witnessing the entry of many fast food global chains. It studies the demographic variables effect on the loyalty and the behaviour of consumers and compares to local and global brand fast food chains. The research will be use to global managers who are planning to expand in emerging markets like India.

Details

British Food Journal, vol. 117 no. 4
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 27 November 2019

Lulu Zhou, Jin Li, Yan Liu, Feng Tian, Xufan Zhang and Weiping Qin

The purpose of this paper is to investigate the mediating effect of information search effort on the relationship between leader narcissism and team creativity in China based on…

1186

Abstract

Purpose

The purpose of this paper is to investigate the mediating effect of information search effort on the relationship between leader narcissism and team creativity in China based on attention theory. The paper also explores participative decision making as a moderator in the relationship between team leader narcissism and information search effort.

Design/methodology/approach

Through a survey of 667 team members and their team leaders from 96 research and development teams at 23 high-tech enterprises in China with paired samples, cross-time data were collected. Confirmatory factor analysis, hierarchical regression and path analysis were adopted to analyze the data.

Findings

This paper found that leader narcissism had a positive impact on team information search effort, thereby promoting team creativity, and the effect of leader narcissism on team information search effort is more positive in the context of high participation in decision making.

Practical implications

Narcissism should be a noteworthy trait in manager selection and promotion especially for the departments and teams which focus on innovation and creation. And companies should pay attention to the team work processes to ensure that team members have the opportunity to participate in decision making for promoting the team leader’s narcissistic “bright” side in the institutional environment and avoiding the “dark” side.

Originality/value

This paper discusses how and when leader narcissism influences team creativity in Chinese high-technology enterprises based on attention theory. This research expands the application of attention theory at the team level.

Details

Leadership & Organization Development Journal, vol. 40 no. 8
Type: Research Article
ISSN: 0143-7739

Keywords

Article
Publication date: 12 January 2018

Yue Wang, Shusheng Zhang, Sen Yang, Weiping He and Xiaoliang Bai

This paper aims to propose a real-time augmented reality (AR)-based assembly assistance system using a coarse-to-fine marker-less tracking strategy. The system automatically…

1018

Abstract

Purpose

This paper aims to propose a real-time augmented reality (AR)-based assembly assistance system using a coarse-to-fine marker-less tracking strategy. The system automatically adapts to tracking requirement when the topological structure of the assembly changes after each assembly step.

Design/methodology/approach

The prototype system’s process can be divided into two stages: the offline preparation stage and online execution stage. In the offline preparation stage, planning results (assembly sequence, parts position, rotation, etc.) and image features [gradient and oriented FAST and rotated BRIEF (ORB)features] are extracted automatically from the assembly planning process. In the online execution stage, too, image features are extracted and matched with those generated offline to compute the camera pose, and planning results stored in XML files are parsed to generate the assembly instructions for manipulators. In the prototype system, the working range of template matching algorithm, LINE-MOD, is first extended by using depth information; then, a fast and robust marker-less tracker that combines the modified LINE-MOD algorithm and ORB tracker is designed to update the camera pose continuously. Furthermore, to track the camera pose stably, a tracking strategy according to the characteristic of assembly is presented herein.

Findings

The tracking accuracy and time of the proposed marker-less tracking approach were evaluated, and the results showed that the tracking method could run at 30 fps and the position and pose tracking accuracy was slightly superior to ARToolKit.

Originality/value

The main contributions of this work are as follows: First, the authors present a coarse-to-fine marker-less tracking method that uses modified state-of-the-art template matching algorithm, LINE-MOD, to find the coarse camera pose. Then, a feature point tracker ORB is activated to calculate the accurate camera pose. The whole tracking pipeline needs, on average, 24.35 ms for each frame, which can satisfy the real-time requirement for AR assembly. On basis of this algorithm, the authors present a generic tracking strategy according to the characteristics of the assembly and develop a generic AR-based assembly assistance platform. Second, the authors present a feature point mismatch-eliminating rule based on the orientation vector. By obtaining stable matching feature points, the proposed system can achieve accurate tracking results. The evaluation of the camera position and pose tracking accuracy result show that the study’s method is slightly superior to ARToolKit markers.

Details

Assembly Automation, vol. 38 no. 1
Type: Research Article
ISSN: 0144-5154

Keywords

Article
Publication date: 8 August 2022

Weiping Yu, Fasheng Cui, Xiaoyun Han and Mengjiao Lv

Food recalls are more potentially harmful than other product recalls. This research aimed to investigate the effect of the recall strategies of food corporations on their brand…

Abstract

Purpose

Food recalls are more potentially harmful than other product recalls. This research aimed to investigate the effect of the recall strategies of food corporations on their brand image and consumers’ purchase intention.

Design/methodology/approach

This study adopts a between-subjects experiment of 2 (corporate recall strategy: voluntary recall, mandatory recall) *3 (food recall level (severity): high, medium, low), and recruits 224 consumers involved in cereal product recall in China. The authors inductively examine the effects of voluntary and mandatory recall on consumer perception and behavior intentions in the recall process.

Findings

Voluntary recall (vs. mandatory recall) will improve corporate brand responsibility image (vs. brand ability image) and consumers’ purchase intention to focal brand (vs. competitive brand and organic brand). Perceived corporate legitimacy and food safety play a mediating role. The former has a greater positive impact on brand image, and the latter has a more significant favorable influence on purchase intention. Furthermore, recall level has a moderating effect on the association between corporate recall strategy and perceived food safety, but is not significant in the effect of corporate recall strategy on perceived corporate legitimacy.

Originality/value

Previous inconsistent conclusions cannot effectively guide food corporations to manage recall strategies. This paper demonstrates the response mechanism of the recall strategy from the perspective of corporate social responsibility, which is beneficial to food safety crisis management and research.

Details

British Food Journal, vol. 125 no. 4
Type: Research Article
ISSN: 0007-070X

Keywords

Article
Publication date: 30 July 2018

Manxiu Ning, Weiping Liu, Jinquan Gong and Xudong Liu

The purpose of this paper is to examine the effect of New Rural Pension Scheme (NRPS) on the private transfer behavior of the non-co-resident adult children to their elderly…

Abstract

Purpose

The purpose of this paper is to examine the effect of New Rural Pension Scheme (NRPS) on the private transfer behavior of the non-co-resident adult children to their elderly parents in rural China, and hence address the income redistribution effectiveness of public program for the elderly in rural China.

Design/methodology/approach

Pooled data from two waves of the China Health and Retirement Longitudinal Study and the combination of regression discontinuity design and difference in difference method are used to perform the analysis.

Findings

No evidence is found that pension payment from NRPS program does significantly crowd out the economic support from the adult children to their elder parents. The heterogeneous effects at different income percentile indicate that pension payment significantly increases the probability of receiving gross transfers and likelihood of the net transfer being positive for those elderly individuals with low income; in particular, the distinctive “family binding” arrangement may dramatically contribute to increasing the probability of receiving private transfers for the pension recipients.

Originality/value

The empirical findings would have far-reaching implications for the efficacy of public transfer or re-distributive programs such as NRPS; for the rural elderly, in particular, the unique “family binding” mechanism under the NRPS program may have positive welfare effects on the intended beneficiaries. Furthermore, an understanding of the inter-linkage between informal arrangements of elderly support and social re-distributive program provides further insight into the design of social security systems targeted to the vulnerable group in developing countries.

Details

China Agricultural Economic Review, vol. 11 no. 2
Type: Research Article
ISSN: 1756-137X

Keywords

Article
Publication date: 30 September 2013

Sheng Xu, Hao Wei Wang, Xing Zhang and Weiping He

The purpose of this paper is to investigate the corrosion behaviors of 2A12 aluminum alloy in NaCl and EXCO solution, and establish the relationship between the corrosion depth…

Abstract

Purpose

The purpose of this paper is to investigate the corrosion behaviors of 2A12 aluminum alloy in NaCl and EXCO solution, and establish the relationship between the corrosion depth and the time.

Design/methodology/approach

Alternate immersion corrosion test chamber was used to perform the corrosion test. The corrosion mediums were 3.5 percent NaCl solution and EXCO solution (NaCl 234 g/L, KNO3 50 g/L, 68 percent HNO3 6.8 mL/L). The surface morphology was studied using the digital microscope.

Findings

The average corrosion rate of aluminum alloy in NaCl solution decreased gradually at the initial stage and then went to a plateau value. The average corrosion rate of aluminum alloy in EXCO solution increased first, then showed a downward trend. The empirical function D=At B was verified.

Originality/value

The results could provide a reference for the establishment of accelerated environmental spectrum in the laboratory and give instructions on the application of aluminum alloy in alternated dry and wet environment.

Details

Multidiscipline Modeling in Materials and Structures, vol. 9 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 6 July 2015

R C Mittal and Amit Tripathi

The purpose of this paper is to develop an efficient numerical scheme for non-linear two-dimensional (2D) parabolic partial differential equations using modified bi-cubic B-spline…

Abstract

Purpose

The purpose of this paper is to develop an efficient numerical scheme for non-linear two-dimensional (2D) parabolic partial differential equations using modified bi-cubic B-spline functions. As a test case, method has been applied successfully to 2D Burgers equations.

Design/methodology/approach

The scheme is based on collocation of modified bi-cubic B-Spline functions. The authors used these functions for space variable and for its derivatives. Collocation form of the partial differential equation results into system of first-order ordinary differential equations (ODEs). The obtained system of ODEs has been solved by strong stability preserving Runge-Kutta method. The computational complexity of the method is O(p log(p)), where p denotes total number of mesh points.

Findings

Obtained numerical solutions are better than those available in literature. Ease of implementation and very small size of computational work are two major advantages of the present method. Moreover, this method provides approximate solutions not only at the grid points but also at any point in the solution domain.

Originality/value

First time, modified bi-cubic B-spline functions have been applied to non-linear 2D parabolic partial differential equations. Efficiency of the proposed method has been confirmed with numerical experiments. The authors conclude that the method provides convergent approximations and handles the equations very well in different cases.

Article
Publication date: 18 December 2019

Weiping Jiang and Xianbo Zhao

The purpose of this paper is to explore the key factors in generating trust, and the effects of trust on the intention to cooperate in energy performance contracting (EPC), from…

Abstract

Purpose

The purpose of this paper is to explore the key factors in generating trust, and the effects of trust on the intention to cooperate in energy performance contracting (EPC), from the perspective of energy saving companies (ESCOs).

Design/methodology/approach

A questionnaire survey was undertaken to collect the data from the experienced project managers in ESCOs. Structural equation modeling was used to test the hypotheses.

Findings

The results revealed that competence, integrity, communication, reciprocity and contract had positive effects on calculative trust and relational trust. Both calculative trust and relational trust, in turn, were found to have positive effects on the intention to cooperate.

Research limitations/implications

The conclusions are derived from the Chinese cultural background and may apply to a certain geographical scope. In addition, this study focused on the perspective of ESCOs but did not consider that of facility owners.

Practical implications

This research would supply guidance for facility owners or users to cultivate trust from ESCOs and achieve cooperation in EPC.

Originality/value

Most of the existing studies have focused on the perspective of facility owners while few have attempted to investigate the perspective of ESCOs. This study contributes to the knowledge body relating to EPC by investigating the relationship between trust and the intention to cooperate from the perspective of ESCOs. In addition, most EPC studies recognized trust as a condition for the successful execution of EPC projects but failed to consider the role of trust in setting up the cooperation relationship prior to project execution.

Details

Engineering, Construction and Architectural Management, vol. 28 no. 1
Type: Research Article
ISSN: 0969-9988

Keywords

Article
Publication date: 2 May 2017

Carlton Clark and Lei Zhang

This paper aims to elucidate the systemic processes underlying the enhanced information-control measures taken by the Chinese Communist Party (CCP) under the leadership of…

Abstract

Purpose

This paper aims to elucidate the systemic processes underlying the enhanced information-control measures taken by the Chinese Communist Party (CCP) under the leadership of President Xi Jinping. The tightening of state information control has stimulated increasingly sophisticated methods of disseminating information on the part of professional and citizen journalists. Drawing on social systems theory as articulated by Niklas Luhmann and others, the authors frame the CCP’s enhanced information-control efforts as a response to the increasing systemic complexity of Chinese journalism, which is part of a self-reproducing, self-regulating (autopoietic) global journalism system. The authors use both subtle and overt protests over Chinese censorship as evidence for the journalism system’s increasing complexity and autonomy. The authors observe that levels of complexity ratchet up as the CCP and Chinese journalism counter each other’s moves. Finally, the authors suggest that the increasing complexity of the CCP’s information-control apparatus may be unsustainable.

Design/methodology/approach

The authors ground their argument in Luhmannian social systems theory.

Findings

The CCP's effort to control journalism leads to increased internal complexity in the form of huge bureaucracies that themselves must be overseen in an almost endless proliferation of surveillance.

Research limitations/implications

This paper contributes to theoretical work in post-humanism.

Originality/value

To the authors’ knowledge, no studies have examined the tension between CCP censors and Chinese journalism from a Luhmannian systems theory perspective.

Details

Kybernetes, vol. 46 no. 5
Type: Research Article
ISSN: 0368-492X

Keywords

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