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Article
Publication date: 6 August 2020

Niu-Jing Ma, Li-Xiong Gu, Long Piao and Xing-Zhi Zhang

Stiffened plates have been widely used in civil, marine, aerospace engineering. As a kind of thin-walled structure operating in complex environment, stiffened plates…

Abstract

Purpose

Stiffened plates have been widely used in civil, marine, aerospace engineering. As a kind of thin-walled structure operating in complex environment, stiffened plates mostly undergo a variety of dynamic loads, which may sometimes result in large-amplitude vibration. Additionally, initial stresses and geometric imperfections are widespread in this type of structure. Furthermore, it is universally known that initial stresses and geometric imperfections may affect mechanical behavior of structures severely, particularly in dynamic analysis. Thus, the purpose of this paper is to study the stress variation rule of a stiffened plate during large-amplitude vibration considering initial stresses and geometric imperfections.

Design/methodology/approach

The initial stresses are represented in the form of initial bending moments applying to the stiffened plate, while the initial geometric imperfections are considered by means of trigonometric series, and they are assumed existing in the plate along the z-direction exclusively. Then, the dynamic equilibrium equations of the stiffened plate are established using Lagrange’s equation as well as aforementioned conditions. The nonlinear differential equations of motion are simplified as a two-degree-of-freedom system by considering 1:2 and 1:3 internal resonances, respectively, and the multiscale method is applied to solve the equations.

Findings

The influence of initial stresses on the plate, stresses during internal resonance is remarkable, while that is moderate for initial geometric imperfections. (Upon considering the existence of initial stresses or geometric imperfections, the stresses of motivated modes are less than the primary mode for both and internal resonances). The influence of bidirectional initial stresses on the plate’s stresses during internal resonance is more remarkable than that of unidirectional initial stresses. The coupled vibration in 1%3A2 internal resonance is fiercer than that in internal resonance.

Originality/value

Stiffened plates are widely used in engineering structures. However, as a type of thin-walled structure, stiffened plates vibrate with large amplitude in most cases owning to their complicated operation circumstance. In addition, stiffened plates usually contain initial stresses and geometric imperfections, which may result in the variation of their mechanical behavior, especially dynamical behavior. Based on the above consideration, this paper studies the nonlinear dynamical behavior of stiffened plates with initial stresses and geometrical imperfections under different internal resonances, which is the originality of this work. Furthermore, the research findings can provide references for engineering design and application.

Details

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

Keywords

Article
Publication date: 6 November 2017

Muhammad Ansar Majeed, Xian-zhi Zhang and Zhaonan Wang

This study aims to examine the impact of various dimensions of product market competition on accounting conservatism particularly in the wake of regulatory changes and…

Abstract

Purpose

This study aims to examine the impact of various dimensions of product market competition on accounting conservatism particularly in the wake of regulatory changes and varying ownership structures in China.

Design/methodology/approach

This study examines impact of product market competition on accounting conservatism by using conservatism measure of Khan and Watts (2009) and measures for important dimensions of competition such as competition intensity, non-price competition and competition from existing rivals and potential entrants.

Findings

The findings suggest that competition intensity and non-price competition result in higher conservatism. This study also advocates that industry leaders exhibit lower conservatism as compared to industry followers. Moreover, the authors document positive association between competition from existing/potential rivals and accounting conservative. These findings reveal that regulatory changes (International Financial Reporting Standards adoption) influence the effect of various dimensions of competition on conservatism. The authors also propose that financial reporting practices of state-owned enterprises are not influenced by competition. However, competition affects financial reporting (conservatism) when institutional or managerial ownership is higher.

Originality/value

The authors document that strategic considerations shape conservative financial reporting decisions of the managers. This study also advocates that when regulatory changes affect the influence of competitive pressure on the conservative reporting decisions of the mangers. Findings also suggest that unlike state ownership, institutional as well as managerial ownership affects the influence of competition on managerial decisions like conservative financial reporting. These results are robust to various alternative measures of conservatism.

Details

Chinese Management Studies, vol. 11 no. 4
Type: Research Article
ISSN: 1750-614X

Keywords

Article
Publication date: 20 October 2020

Leigh Anne Liu, Chi-Yue Chiu and Zhi-Xue Zhang

The purpose of this paper is to conceptually distinguish between communal and exchange relationship schemata and analyze their dynamic interactions and transformations in…

Abstract

Purpose

The purpose of this paper is to conceptually distinguish between communal and exchange relationship schemata and analyze their dynamic interactions and transformations in multicultural contexts.

Design/methodology/approach

Drawing on theories of social capital, social exchange, networks and relational models, the authors propose a framework to conceptualize how the communal and exchange relationship schemata can be transformed, integrated and multiplied under contextual influences, especially in culturally complex settings faced by multinational organizations.

Findings

The authors elucidate the dynamic processes of schemata interactions and transformations in relationship management at interpersonal, interorganizational and national levels in a variety of intercultural contexts, including interactions between monoculturals from different cultures and interplay of cultures within biculturals and among multiculturals. The authors explain how schemata integration and fusion can provide competitive advantages in navigating multicultural relationships.

Research limitations/implications

Systematic qualitative and quantitative studies are recommended to further test and refine the proposed ideas regarding the dynamic interactions and transformations of relationship schemata.

Practical implications

This paper presents implications for individuals, country managers and leaders who need to initiate and maintain relationships with culturally different others. The authors highlight the desirability of being aware of one's own relational schema, understanding others' schema, bridging the two schemata as well as fostering integration and fusion of the schemata.

Social implications

The 2020 global pandemic and various social upheavals around the world highlight the urgency of finding effective mental models to manage relationships. The inclusive and adaptive ways of thinking about relationships can potentially facilitate harmonious connections and conflict resolution.

Originality/value

The authors conceptually disentangle two established relationship schemata and offer a model of their dynamic synergetic transformations.

Details

Cross Cultural & Strategic Management, vol. 28 no. 2
Type: Research Article
ISSN: 2059-5794

Keywords

Article
Publication date: 16 October 2018

Wenxiong Lin, Huagang Liu, Haizhou Huang, Jianhong Huang, Kaiming Ruan, Zixiong Lin, Hongchun Wu, Zhi Zhang, Jinming Chen, Jinhui Li, Yan Ge, Jie Zhong, Lixin Wu and Jie Liu

The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the…

Abstract

Purpose

The purpose of this paper is to explore the possibility of an enhanced continuous liquid interface production (CLIP) with a porous track-etched membrane as the oxygen-permeable window, which is prepared by irradiating polyethylene terephthalate membranes with accelerated heavy ions.

Design/methodology/approach

Experimental approaches are carried out to characterize printing parameters of resins with different photo-initiator concentrations by a photo-polymerization matrix, to experimentally observe and theoretically fit the oxygen inhibition layer thickness during printing under conditions of pure oxygen and air, respectively, and to demonstrate the enhanced CLIP processes by using pure oxygen and air, respectively.

Findings

Owing to the high permeability of track-etched membrane, CLIP process is demonstrated with printing speed up to 800 mm/h in the condition of pure oxygen, which matches well with the theoretically predicted maximum printing speed at difference light expose. Making a trade-off between printing speed and surface quality, maximum printing speed of 470 mm/h is also obtained even using air. As the oxygen inhibition layer created by air is thinner than that by pure oxygen, maximum speed cannot be simply increased by intensifying the light exposure as the case with pure oxygen.

Originality/value

CLIP process is capable of building objects continuously instead of the traditional layer-by-layer manner, which enables tens of times improvement in printing speed. This work presents an enhanced CLIP process by first using a porous track-etched membrane to serve as the oxygen permeable window, in which a record printing speed up to 800 mm/h using pure oxygen is demonstrated. Owing to the high permeability of track-etched membrane, continuous process at a speed of 470 mm/h is also achieved even using air instead of pure oxygen, which is of significance for a compact robust high-speed 3D printer.

Details

Rapid Prototyping Journal, vol. 25 no. 1
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 27 April 2020

Lipeng Wang, Zhi Zhang, Qidan Zhu and Xingwei Jiang

This paper aims to propose a novel model predictive control (MPC) with time varying weights to develop a lateral control law in an automatic carrier landing system (ACLS)…

Abstract

Purpose

This paper aims to propose a novel model predictive control (MPC) with time varying weights to develop a lateral control law in an automatic carrier landing system (ACLS), which minimizes landing risk and improves flight quality.

Design/methodology/approach

First, a nonlinear mathematic model of an F/A-18 aircraft during lateral landing is established. Then the landing model is linearized in the form of state deviations on the equilibrium points. Second, landing risk windows are proposed and a high-dimensional landing risk model is addressed through a back propagation (BP) neural network. The trained samples are acquired based on a pilot behavior model. Third, time varying weights created from the lateral landing risk are introduced into the performance function of MPC. Optimal solution is solved quicker and some state deviations are focused on and eliminated. Fourth, the algebraic inequalities are substituted by the linear matrix inequalities (LMIs), which are easily calculated by the computers.

Findings

On a semi-physical platform, the proposed method compares with a traditional MPC algorithm and a modified MPC with an additional term. The test results indicate that the proposed algorithm brings about an excellent landing performance as well as an ability of eliminating landing risk.

Practical implications

The landing phase of a carrier-based aircraft is one of the most dangerous and complicated stages, and the algorithm proposed by this paper plays a vital role in the lateral landing.

Originality/value

This paper establishes a lateral landing risk model, which considers not only the current landing state but also the future touchdown point. This lateral landing risk is integrated into the time varying weights of the MPC algorithm so that the state deviations and landing risk can be both reduced in the rolling optimization.

Details

Aircraft Engineering and Aerospace Technology, vol. 92 no. 6
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 1 August 2016

Muhammad Ansar Majeed and Xian-zhi Zhang

This study aims to examine the impact of product market competition (PMC) from existing rivals and potential market entrants on earnings quality (EQ) in China.

Abstract

Purpose

This study aims to examine the impact of product market competition (PMC) from existing rivals and potential market entrants on earnings quality (EQ) in China.

Design/methodology/approach

This study examines the impact of PMC on EQ by using the EQ measure of Kothari et al. (2005), and it uses measures for competition from existing and potential rivals. This study analyzed Chinese firms for the period of 2000-2014 and also examined the impact of International Financial Reporting Standards (IFRS) adoption and state ownership on the relationship between PMC and EQ.

Findings

This study found a positive relationship between PMC and EQ. It also documents that competition from existing rivals does not improve EQ by reducing real activity manipulation, but competition from potential entrants does. The findings propose that market competition from existing rivals is a relevant factor for determining EQ before and after IFRS adoption, but competition from potential entrants improves EQ only after IFRS adoption. Moreover, the results suggest that market competition plays no role in improving the EQ of state-owned enterprises (SOEs).

Originality/value

The results support the argument that PMC acts as a governance mechanism and influences managerial decisions regarding financial reporting. Our study also helps to understand the impact of change in the regulatory regime, i.e. IFRS adoption, on the relationship between PMC and EQ. This study also helps demonstrate the impact of competition on management decisions with respect to the EQ of SOEs.

Details

Chinese Management Studies, vol. 10 no. 3
Type: Research Article
ISSN: 1750-614X

Keywords

Article
Publication date: 1 December 2001

George Stylios

Discusses the 6th ITCRR, its breadth of textile and clothing research activity, plus the encouragement given to workers in this field and its related areas. States that…

1045

Abstract

Discusses the 6th ITCRR, its breadth of textile and clothing research activity, plus the encouragement given to workers in this field and its related areas. States that, within the newer research areas under the microscope of the community involved, technical textiles focuses on new, ‘smart’ garments and the initiatives in this field in both the UK and the international community at large. Covers this subject at length.

Details

International Journal of Clothing Science and Technology, vol. 13 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Abstract

The COVID-19 pandemic and its related economic meltdown and social unrest severely challenged most countries, their societies, economies, organizations, and individual citizens. Focusing on both more and less successful country-specific initiatives to fight the pandemic and its multitude of related consequences, this chapter explores implications for leadership and effective action at the individual, organizational, and societal levels. As international management scholars and consultants, the authors document actions taken and their wide-ranging consequences in a diverse set of countries, including countries that have been more or less successful in fighting the pandemic, are geographically larger and smaller, are located in each region of the world, are economically advanced and economically developing, and that chose unique strategies versus strategies more similar to those of their neighbors. Cultural influences on leadership, strategy, and outcomes are described for 19 countries. Informed by a cross-cultural lens, the authors explore such urgent questions as: What is most important for leaders, scholars, and organizations to learn from critical, life-threatening, society-encompassing crises and grand challenges? How do leaders build and maintain trust? What types of communication are most effective at various stages of a crisis? How can we accelerate learning processes globally? How does cultural resilience emerge within rapidly changing environments of fear, shifting cultural norms, and profound challenges to core identity and meaning? This chapter invites readers and authors alike to learn from each other and to begin to discover novel and more successful approaches to tackling grand challenges. It is not definitive; we are all still learning.

Details

Advances in Global Leadership
Type: Book
ISBN: 978-1-80071-838-8

Keywords

Article
Publication date: 1 May 2014

Winnie W.Y. Chan, Chester K.M. To, Alice W.C. Chu and Zhiming Zhang

Chinese tourists have become the greatest driving force behind global tourism. An increasing number of luxury fashion brands regard these tourists as a potentially…

Abstract

Chinese tourists have become the greatest driving force behind global tourism. An increasing number of luxury fashion brands regard these tourists as a potentially significant segment of status-conscious consumers. Yet a limited number of marketing studies have addressed the significance of the intrinsic motivation that drives these tourist consumers to consume luxury goods. This study investigates the significant intrinsic factors that affect the luxury goods buying behavior of tourist consumers. Data are collected from 284 tourist consumers and analyzed by using the exploratory factor analysis (EFA) and cluster analysis. The EFA purified the measurement instruments to four factor attributes, namely, self-satisfaction, possession obsessiveness, status consciousness and personal differentness. The cluster analysis identified three groups of tourist consumers with distinctive behavioral segmentation criteria: ‘shopping hedonists’, ‘ego-defended achievers’ and ‘conspicuous fashionistas’. These findings provide managerial implications for building sustainable luxury businesses and competitive strategies tailored for tourist consumers.

Details

Research Journal of Textile and Apparel, vol. 18 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Abstract

Details

Anti-Corrosion Methods and Materials, vol. 55 no. 5
Type: Research Article
ISSN: 0003-5599

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