Search results

1 – 10 of over 5000
Article
Publication date: 6 March 2017

Shuixian Hu, Ruomei Wang and Fan Zhou

The purpose of this paper is to present an efficient algorithm for multi-layer garment fitting simulation based on the geometric method to solve the low time cost problem during…

Abstract

Purpose

The purpose of this paper is to present an efficient algorithm for multi-layer garment fitting simulation based on the geometric method to solve the low time cost problem during penetration detection and processing. This is more practical to design a CAD system to preview the multi-layer garment fitting effect in daily life.

Design/methodology/approach

The construction of a multi-layer garment based on existing 3D garments is a suitable method because this method is similar to the daily method of multi-layer dressing. The major problem is the penetration phenomenon between different garments because these 3D garment’s geometric shapes are constructed in different situations. In this paper, an efficient algorithm of multi-layer garment simulation is reported. A face-face intersection detection algorithm is designed to detect the penetration region between multi-layer garments fast and a geometric penetration processing algorithm is presented to solve the penetration phenomenon during multi-layer garment simulation.

Findings

This method can quickly detect the penetration between faces, and then deal with the penetration for multi-layer garment construction. Experimental results show that this method can not only remove the penetration but basically maintain the trend of wrinkles efficiently. At the same time, the garments used in the experiment have almost more than 5,800 faces, but the resolving time is under five seconds.

Originality/value

The main originalities of the multi-layer garment virtual fitting algorithm based on the geometric method are highly efficient both in terms of time cost and fitting effect. Based on this method, the technology of multi-layer garment virtual fitting can be used to design a novel CAD system to preview the multi-layer garment fitting effect in real time. This is a pressing requirement of virtual garment applications.

Details

International Journal of Clothing Science and Technology, vol. 29 no. 1
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 13 October 2022

Yang Zhou, Wenying Qu, Fan Zhou, Xinggang Li, Lijun Song and Qiang Zhu

This paper aims to understand the magnetohydrodynamics (MHD) mechanism in the molten pool under different modes of magnetic field. The comparison focuses on the Lorenz force…

Abstract

Purpose

This paper aims to understand the magnetohydrodynamics (MHD) mechanism in the molten pool under different modes of magnetic field. The comparison focuses on the Lorenz force excitation and its effect on the melt flow and solidification parameters, intending to obtain practical references for the design of magnetic field-assisted laser directed energy deposition (L-DED) equipment.

Design/methodology/approach

A three-dimensional transient multi-physical model, coupled with MHD and thermodynamic, was established. The dimension and microstructure of the molten pool under a 0T magnetic field was used as a benchmark for accuracy verification. The interaction between the melt flow and the Lorenz force is compared under a static magnetic field in the X-, Y- and Z-directions, and also an oscillating and alternating magnetic field.

Findings

The numerical results indicate that the chaotic fluctuation of melt flow trends to stable under the magnetostatic field, while a periodically oscillating melt flow could be obtained by applying a nonstatic magnetic field. The Y and Z directional applied magnetostatic field shows the effective damping effect, while the two nonstatic magnetic fields discussed in this paper have almost the same effect on melt flow. Since the heat transfer inside the molten pool is dominated by convection, the application of a magnetic field has a limited effect on the temperature gradient and solidification rate at the solidification interface due to the convection mode of melt flow is still Marangoni convection.

Originality/value

This work provided a deeper understanding of the interaction mechanism between the magnetic field and melt flow inside the molten pool, and provided practical references for magnetic field-assisted L-DED equipment design.

Details

Rapid Prototyping Journal, vol. 29 no. 3
Type: Research Article
ISSN: 1355-2546

Keywords

Article
Publication date: 14 April 2020

Yu Yan, Wei Jiang, Dehua Zou, Wusheng Quan, Hong Jun Li, YunFei Lei and Zhan fan Zhou

In the long-term network operation, the power distribution network will be subjected to the effects of ultra-high voltage, strong electromagnetic interference and harsh natural…

Abstract

Purpose

In the long-term network operation, the power distribution network will be subjected to the effects of ultra-high voltage, strong electromagnetic interference and harsh natural environment on the power system, which will lead to the occurrence of different faults in the distribution network and directly affect the normal operation of the power grid.

Design/methodology/approach

The purpose of this study is to solve the problems of labor intensity, high risk and low efficiency of distribution network manual maintenance operation, this paper proposed a new configuration of the live working robot for distribution network maintenance, the robot is equipped with dual working arms through the mobile platform, which can realize the coordination movement, the autonomous reorganization and replacement of the end tools, respectively, so as the robot power distribution maintenance function such as stripping, trimming, wiring and the operation control problem of the distribution network-robot with small arms and in small operation space can be realized.

Findings

To effective elimination or reduce the adverse effects of the internal forces in the closed chain between the working object and manipulator under the typical task of the 10 kV distribution network, this paper has established the robot coordinated control dynamics model in the closed-chain between the dual-working object and proposed the dynamic distribution method of closed-chain internal force and the effectiveness has been proved by simulation experiments and 10 kV field operation.

Originality/value

The force-position hybrid control can realize the mutual compensation of force and position so as to effectively reduce the internal force in the closed chain. Finally, the engineering practicality of the method is verified by field operation experiment, the effective implementation of this control method greatly improves the robot working efficiency and the operation reliability, the promotion and application of the control method have great theoretical and practical value and maintenance management system, so as to achieve automation of electric.

Details

Industrial Robot: the international journal of robotics research and application, vol. 47 no. 3
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 19 February 2019

Lijun (Gillian) Lei, Yutao Li and Yan Luo

The emergence of social media as a corporate disclosure channel has caused significant changes in the production and dissemination of corporate information. This review identifies…

Abstract

The emergence of social media as a corporate disclosure channel has caused significant changes in the production and dissemination of corporate information. This review identifies important themes in recent research on the impact of social media on the corporate information environment and provides suggestions for further explorations of this new but fast-growing area of research. Specifically, we first review the evolution of Internet-based corporate disclosure and related regulations, and then focus on three recent streams of research: 1) companies’ use of social media; 2) information produced by non-corporate users and its impact on capital markets; and 3) the credibility of corporate information on social media platforms.

Details

Journal of Accounting Literature, vol. 42 no. 1
Type: Research Article
ISSN: 0737-4607

Keywords

Article
Publication date: 1 October 2018

Penggao Zhang, Boqin Gu, Jianfeng Zhou and Long Wei

The purpose of this study is to investigate the hydrodynamic lubrication characteristics of ferrofluid film for spiral groove mechanical seal in external electromagnetic field and…

Abstract

Purpose

The purpose of this study is to investigate the hydrodynamic lubrication characteristics of ferrofluid film for spiral groove mechanical seal in external electromagnetic field and to analyze the effects of the volume fraction of ferrofluid, parameters of the electromagnetic field, operating parameters and geometrical parameters of mechanical seal on the characteristics of ferrofluid film.

Design/methodology/approach

The relationship between the ferrofluid viscosity and the intensity of external electromagnetic field was established. Based on the Muijderman narrow groove theory, the pressure distribution was calculated with the trial method by trapezoid formula.

Findings

It was found that pressure, average viscosity, average density and opening force of ferrofluid between end faces increase with the increase in intensity of current, volume fraction of ferrofluid, rotating speed, pressure differential and spiral angle; decrease with the increase in temperature; and increase at first and then decrease with the increase in the ratio of groove width to weir and the groove length. All of them reach the maximum value when the ratio of width of groove to weir is 0.7 and the ratio of groove length is 0.6. Leakage of ferrofluid increases with an increase in intensity of current, volume fraction of ferrofluid, rotating speed, pressure differential, spiral angle and ratio of groove length; decreases with an increase in temperature; and increases at first and then decreases with the increase in the ratio of groove width to weir. The tendencies of characteristics of silicone oil are consistent with those of ferrofluid, and the characteristics of silicone oil are smaller than those of ferrofluid under the same condition.

Originality/value

The volume fraction of ferrofluid, rotating speed, spiral angle, ratio of groove width to weir, groove length and temperature have a significant influence on the characteristics of ferrofluid film; however, intensity of current and the pressure differential have slight influence on the characteristics of ferrofluid film. An analytical method for analyzing hydrodynamic lubrication characteristics of ferrofluid film in a spiral groove mechanical seal was proposed based on the Muijderman narrow groove theory.

Details

Industrial Lubrication and Tribology, vol. 70 no. 9
Type: Research Article
ISSN: 0036-8792

Keywords

Book part
Publication date: 17 August 2020

Joshua V. White and Vishal K. Gupta

Unlike other populations, entrepreneurs may be unable to fully escape from job-related stress due to their financial and/or psychological connection to their ventures. The authors…

Abstract

Unlike other populations, entrepreneurs may be unable to fully escape from job-related stress due to their financial and/or psychological connection to their ventures. The authors argue that stress is a universal, intangible variable that profoundly influences the entrepreneurial process. In the present review, the authors critically synthesize past literature to evaluate the substantive body of research on stress in entrepreneurship and assess the impact of stress on individuals’ well-being. The authors find that entrepreneurial stress stems from role conflict or overload, issues related to business operations, and concerns from life outside the venture. Further, stress may result in changes to personal satisfaction and psychological well-being, contingent upon an individual’s stress tolerance, coping strategies, or recovery practices. The entrepreneurial process, from creation to exit, is comprised of several transition periods, all of which are uniquely stressful. The authors explore the implications of our findings by discussing stressors that may manifest during each stage of the entrepreneurial process. Therefore, the authors respond to calls for more dynamic investigation of entrepreneurial stress while also highlighting the need for more research into stressors associated with specific entrepreneurial activities.

Details

Entrepreneurial and Small Business Stressors, Experienced Stress, and Well-Being
Type: Book
ISBN: 978-1-83982-397-8

Keywords

Article
Publication date: 31 December 2021

Yaoqi Li, Lixin Peng, Shuang Ma and Xiaoman Zhou

Limited research has paid attention to the physical attractiveness stereotype in peer-to-peer sharing accommodation settings. Since the high-risk situations in sharing…

Abstract

Purpose

Limited research has paid attention to the physical attractiveness stereotype in peer-to-peer sharing accommodation settings. Since the high-risk situations in sharing accommodations, this paper aims to exam whether beauty premium is still relevant in peer-to-peer (P2P) accommodation.

Design/methodology/approach

The mixed method, including 2,506 secondary data analysis and two scenario experiments, is carried out to test the research framework.

Findings

The results show that both beauty premium and beauty penalty exist in the e-commerce context. Excessively high attractiveness and plain looking of hosts are likely to decrease consumers’ booking decision while moderately attractive hosts will stimulate more booking behaviors. Moreover, perceived trustworthiness mediates the effect of physical attractiveness on booking decision. Additionally, similarity between hosts and consumers plays a moderating role in the relationship between physical attractiveness and perceived trustworthiness.

Research limitations/implications

This study reveals the physical attractiveness stereotype effects in P2P accommodation and carry implications to P2P platforms and hosts for providing moderately attractive profile photos, enhancing trustworthiness and similarity between hosts and consumers. Further studies can investigate the robustness of the findings as well as more possible reasons for its occurrence.

Originality/value

The research provides a clearer understanding of physical attractiveness stereotype effect in peer-to-peer sharing accommodation platforms. Besides, the linkage between physical attractiveness and perceived trustworthiness is dynamic; a high host – consumer similarity weakens the negative impact of both excessively high attractiveness and plain looking on consumers’ perceived trustworthiness.

Details

International Journal of Contemporary Hospitality Management, vol. 34 no. 3
Type: Research Article
ISSN: 0959-6119

Keywords

Article
Publication date: 1 February 2022

Thanh-Long Le, Tran Trung Nghia, Hong Duc Thong and Mai Hoang Kim Son

This paper aims to focus on the effect of the operating condition such as the impeller speed on the centrifugal fan performance and flow characteristics. The ability to predict…

Abstract

Purpose

This paper aims to focus on the effect of the operating condition such as the impeller speed on the centrifugal fan performance and flow characteristics. The ability to predict the behavior of the airflow motion in a centrifugal blower is essential for obtaining the topology optimization design.

Design/methodology/approach

A physical model of the air blower consisting of these main parts in a blower system: collector, impeller, outlet flange and volute casing, and the appropriate boundary conditions are set up by ANSYS software. Computation fluid dynamics are performed for the numerical analysis. The calculation of blower performance parameters such as total pressure, efficiency and flow rate is based on the Reynolds averaged Navier–Stokes equations and k-εturbulence flow model.

Findings

The numerical results show that the change in operating conditions has a significant effect on the blower performance, and the pressure maintained inside the blower is higher for a larger impeller rotational speed.

Originality/value

This work is original and has not yet been submitted to elsewhere or published previously.

Details

International Journal of Intelligent Unmanned Systems, vol. 11 no. 3
Type: Research Article
ISSN: 2049-6427

Keywords

Article
Publication date: 4 June 2019

Kyu-soo Chung, Christopher Brown and Jennifer Willett

The purpose of this paper is to examine the factors that motivate Korean baseball fans to support Korean Major League Baseball (MLB) players and to identify the effects of the…

Abstract

Purpose

The purpose of this paper is to examine the factors that motivate Korean baseball fans to support Korean Major League Baseball (MLB) players and to identify the effects of the motivations on identification and behavioral loyalty.

Design/methodology/approach

Data were collected using a self-administered questionnaire at three Korean universities. A model was designed to see which three motivations (commitment to Korean baseball, interests in MLB and ethnic identity) affect loyalty behaviors to support Korean MLB players. In the model, the mediating effect of player identification is set to the relation between the three motivations and behavioral loyalty. The moderating effect of team identification is also set to the relation between player identification and behavioral loyalty. Collected data (n=294) were first analyzed via confirmatory factor analysis to ascertain the factor structure of the study model. Then, the study performed a structural equation modeling which finds the magnitude and significance of each causal path among designed factors.

Findings

All the effects were found to be significantly positive except team identification whose moderating effect was not significant. Interests in MLB had the greatest impact on the fan’s player identification followed by commitment to the Korean baseball league and their ethnic identity. It was also found that the influence of player identification was positive on behavioral loyalty.

Originality/value

This work can help MLB expand their fan base internationally, especially in Asian countries.

Details

Sport, Business and Management: An International Journal, vol. 9 no. 3
Type: Research Article
ISSN: 2042-678X

Keywords

Article
Publication date: 12 September 2016

Zhimin Fan, Wanfeng Zhou, Ruixue Wang and Na Wang

The purpose of this paper is to derive a new lubrication model of double involute gears drive and study the effect of the tooth waist order parameters of double involute gears on…

Abstract

Purpose

The purpose of this paper is to derive a new lubrication model of double involute gears drive and study the effect of the tooth waist order parameters of double involute gears on lubrication performance.

Design/methodology/approach

The new lubrication model of double involute gears drive was established according to the meshing characteristics of double involute gears drive and the finite length line contact elastohydrodynamic lubrication theory. Numerical calculation of the lubrication model of gear drive was conducted using the multigrid method.

Findings

The results show that the oil film necking phenomenon and the oil film pressure peak emerged at the tooth waist order area and the tooth profile ends, and when compared with involute gear, the lubrication performance at the tooth waist order area is better than that at the tooth profile ends. The effect of tooth waist order parameters on lubrication performance at the tooth waist order area was greater than that at other areas.

Originality/value

This research will promote the application of the double involute gear as soon as possible, and it has the reference value for other types of gears.

Details

Industrial Lubrication and Tribology, vol. 68 no. 6
Type: Research Article
ISSN: 0036-8792

Keywords

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