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Article
Publication date: 9 August 2023

Yi Sui, Yi Wang and Xiang Yu

The dynamic response of the nuclear power plants (NPPs) with pile foundation reinforcement have not yet been systemically investigated in detail. Thus, there is an urgent need to…

Abstract

Purpose

The dynamic response of the nuclear power plants (NPPs) with pile foundation reinforcement have not yet been systemically investigated in detail. Thus, there is an urgent need to improve evaluation methods for nonlithological foundation reinforcements, as this issue is bound to become an unavoidable task.

Design/methodology/approach

A nonlinear seismic wave input method is adopted to consider both a nonlinear viscoelastic artificial boundary and the nonlinear properties of the overburden layer soil. Subsequently, the effects of certain vital parameters on the structural response are analyzed.

Findings

A suitable range for the size of the overburden foundation is suggested. Then, when piles are used to reinforce the overburden foundation, the peak frequencies in the floor response spectra (FRS) in the horizontal direction becomes higher (38%). Finally, the Poisson ratio of the foundation soil has a significant influence on the FRS peak frequency in the vertical direction (reduce 35%–48%).

Originality/value

The quantifiable results are performed to demonstrate the seismic responses with respect to key design parameters, including foundational dimensions, the Poisson Ratio of the soil and the depth of the foundation. The results can help guide the development of seismic safety requirements for NPPs.

Details

Engineering Computations, vol. 40 no. 6
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 7 March 2016

Yi Sui, Ping Zheng, Peilun Tang, Fan Wu and Pengfei Wang

The purpose of this paper is to investigate a five-phase permanent-magnet synchronous machine (PMSM) that features high-power density and high-fault-tolerant capability for…

Abstract

Purpose

The purpose of this paper is to investigate a five-phase permanent-magnet synchronous machine (PMSM) that features high-power density and high-fault-tolerant capability for electric vehicles (EVs).

Design/methodology/approach

The five-phase 20-slot/18-pole PMSM is designed by finite-element method. Two typical rotor structures which include Halbach array and rotor eccentricity are compared to achieve sinusoidal back electromotive force (EMF). The influence of slot dimensions on leakage inductance and short-circuit current is analyzed. The method to reduce eddy current loss of permanent magnets (PMs) is investigated. The machine performances under both healthy and fault conditions are evaluated. Finally, thermal behavior of the machine is studied by Ansys.

Findings

With both no-load and load performances considered, rotor eccentricity is proposed to reduce the harmonic contents of EMF. Increasing slot leakage inductance is an effective way to limit the short-circuit current. By segmenting PMs in circumferential direction, the PM eddy current loss is reduced and the machine efficiency is improved. With proper fault-tolerant control strategy, acceptable torque performance can be achieved under fault conditions. The proposed machine can safely operate under Class F insulation.

Originality/value

So far, many researches focus on multiphase PMSMs used in aviation fields, such as fuel pump and electric actuator. Differing from PMSMs used in aviation applications, machines for EVs require characteristics like wide speed ranges and variable operating conditions. Hence, this paper proposes a five-phase 20-slot/18-pole PMSM for EVs. The proposed design methodology is applicable to multiphase PMSMs with different slot/pole combinations.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 35 no. 2
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 14 May 2024

Damla Yalçıner Çal and Erdal Aydemir

The purpose of this paper is to propose a scenario-based grey methodology using clustering and optimizing with imprecise and uncertain body size data in an emergency assembly…

Abstract

Purpose

The purpose of this paper is to propose a scenario-based grey methodology using clustering and optimizing with imprecise and uncertain body size data in an emergency assembly point area to assign the people on a campus to reach the emergency assembly points under uncertain disaster times.

Design/methodology/approach

Grey clustering and a new grey p-median linear programming model are developed to determine which units to assign to the pre-determined assembly points for a main campus in case of a disaster. The models have two scenarios: 70 and 100% occurrence capacities of administrative and academic personnel and students.

Findings

In this study, the academic and administrative units have been assigned to determine five different emergency assembly points on the main campus by using the numbers of the academic and administrative personnel and student and distances of the units to the assembly point areas of each other. The alternative solutions are obtained effectively by evaluating capacity utilization rates in the scenarios.

Practical implications

It is often unclear when disasters can occur and therefore, a preliminary preparation time must be required to minimize the risk. In the case of natural, man-made (unnatural) or technological disasters, the people are required to defend themselves and move away from the disaster area as soon as possible in a proper direction. The proposed assignment model yields a final solution that effectively eliminates uncertainty regarding the selection of emergency assembly points for administrative and academic staff as well as students, in the event of disasters.

Originality/value

Grey clustering suggests an assignment plan and concurrently, an investigation is underway utilizing the grey p-median linear programming model. This investigation aims to optimize various scenarios and body sizes concerning emergency assembly areas. All campus users who are present at the disaster in units of the campus are getting uncertainty about which emergency assembly point to use, and with this study, the vital risks aim to be ultimately reduced with reasonable plans.

Details

Grey Systems: Theory and Application, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2043-9377

Keywords

Article
Publication date: 20 January 2023

Jing Zhan and Yue Zhao

The purpose of this study is to explore a balanced understanding of the relationship between perceived occupational stigma and social workers’ proactive behaviors in China…

Abstract

Purpose

The purpose of this study is to explore a balanced understanding of the relationship between perceived occupational stigma and social workers’ proactive behaviors in China. Drawing on cognitive appraisal theory, this study explored the mediating role of threat and challenge appraisals, as well as the moderating role of trait resilience.

Design/methodology/approach

Data were collected using a time-lagged research design. The hypotheses were examined using a sample of 338 social workers in China.

Findings

Perceived occupational stigma is appraised as both a challenge and a threat simultaneously. Challenge appraisal positively mediated perceived occupational stigma and proactive behavior, whereas threat appraisal negatively mediated this relationship. Trait resilience moderated the effect of threat appraisal, suggesting that perceived occupational stigma was appraised as a threat when trait resilience was lower (rather than higher), which then reduced social workers’ proactive behaviors.

Originality/value

This study enriches the literature on perceived occupational stigma by identifying the relationship and mechanism of perceived occupational stigma-proactive behaviors and a boundary condition from the theoretical perspective of cognitive appraisals. It demonstrates both the positive and negative aspects of perceived occupational stigma as appraised by social workers in relation to an important workplace outcome of proactive behaviors. In addition, it offers a fresh approach by exploring perceived occupational stigma from the perspective of social workers.

Details

Cross Cultural & Strategic Management, vol. 30 no. 2
Type: Research Article
ISSN: 2059-5794

Keywords

Article
Publication date: 17 July 2019

Yanyu Chen, Yi-Chieh Lin, Miao-Sui Hsu and Yi-Hsin Lin

The purpose of this paper is to build a new transformational leadership typology by demonstrating high/low degrees of group- and individual-focused transformational leader…

Abstract

Purpose

The purpose of this paper is to build a new transformational leadership typology by demonstrating high/low degrees of group- and individual-focused transformational leader behaviors – authentic type (high-high), group-oriented type (high-low) and individual-oriented type (low-high) – and to predict that the three types relate differently to follower responses (intention to sacrifice, cognitive trust of supervisor and affective liking).

Design/methodology/approach

This study uses an experimental scenario to generate the maximum levels of between-group variance among the three types. A total of 182 mainland Chinese full-time employees participated in the experiment.

Findings

Followers’ intention to sacrifice is equally high under the authentic, group-oriented and individual-oriented types of leadership. In addition, followers’ cognitive trust of supervisor is equally high under the authentic and group-oriented types and the lowest under the individual-oriented type. Finally, followers’ affective liking is equally high under the authentic and individual-oriented types and the lowest for the group-oriented type.

Originality/value

A new transformational leadership typology that combines high and low degrees of group- and individual-focused behaviors is established. Based on this typology, this study shows how the three types distinctively affect followers’ reactions, including intention to sacrifice, cognitive trust of supervisor and affective liking.

Details

Chinese Management Studies, vol. 14 no. 1
Type: Research Article
ISSN: 1750-614X

Keywords

Article
Publication date: 30 November 2023

Wenbo Li, Bin Dan, Xumei Zhang, Yi Liu and Ronghua Sui

With the rapid development of the sharing economy in manufacturing industries, manufacturers and the equipment suppliers frequently share capacity through the third-party…

Abstract

Purpose

With the rapid development of the sharing economy in manufacturing industries, manufacturers and the equipment suppliers frequently share capacity through the third-party platform. This paper aims to study influences of manufacturers sharing capacity on the supplier and to analyze whether the supplier shares capacity as well as its influences.

Design/methodology/approach

This paper deals with conditions that the supplier and manufacturers share capacity through the third-party platform, and the third-party platform competes with the supplier in equipment sales. Considering the heterogeneity of the manufacturer's earning of unit capacity usage and the production efficiency of manufacturer's usage strategies, this paper constructs capacity sharing game models. Then, model equilibrium results under different sharing scenarios are compared.

Findings

The results show that when the production or maintenance cost is high, manufacturers sharing capacity simultaneously benefits the supplier, the third-party platform and manufacturers with high earnings of unit capacity usage. When both the rental efficiency and the production cost are low, or both the rental efficiency and the production cost are high, the supplier simultaneously sells equipment and shares capacity. The supplier only sells equipment in other cases. When both the rental efficiency and the production cost are low, the supplier’s sharing capacity realizes the win-win-win situation for the supplier, the third-party platform and manufacturers with moderate earnings of unit capacity usage.

Originality/value

This paper innovatively examines supplier's selling and sharing decisions considering manufacturers sharing capacity. It extends the research on capacity sharing and is important to supplier's operational decisions.

Details

Industrial Management & Data Systems, vol. 124 no. 2
Type: Research Article
ISSN: 0263-5577

Keywords

Article
Publication date: 17 April 2007

Low Sui Pheng

The Chinese civilization is an important part of the history of mankind. The purpose of this paper is to show that there are project management lessons to be learned from Chinese…

3330

Abstract

Purpose

The Chinese civilization is an important part of the history of mankind. The purpose of this paper is to show that there are project management lessons to be learned from Chinese history, including that relating to the management of the building process in ancient China.

Design/methodology/approach

Through a review of the literature, this paper discusses the key management and economic practices in the building process of ancient China and highlights these practices from an important document, the Yingzao Fashi or (“Treatise on Architectural Methods”), that was compared with the modern‐day project management framework.

Findings

This paper explains the official systems instituted for public projects; the management of labour, design and planning of construction works; quantity surveying practices; the use, control and recycling of building materials; and inspection of building elements in ancient China.

Practical implications

The study suggests that lessons in the principles of construction project management in ancient China bear many similarities with the nine areas of modern‐day project management body of knowledge relating to integration, scope, time, cost, quality, human resource, communications, risk, and procurement management. An area for future research would be to compare the Yingzao Fashi with modern‐day codes of practice for building works to determine which of its “ancient” provisions relating to quality management are still relevant today.

Originality/value

It was found that much emphasis was placed by the ancient Chinese on the quality aspects of prominent building projects. This is one facet from which modern‐day project managers and clients can draw lessons.

Details

Journal of Management History, vol. 13 no. 2
Type: Research Article
ISSN: 1751-1348

Keywords

Article
Publication date: 28 June 2021

Meimei Zhao, Dalong Li, Yaqin Xu, Xueying Bu, Chen Shen, Libo Wang, Yu Yang and Jingwen Bai

This paper aims to explore the adsorption kinetics of syringin from Syringa oblata Lindl. leaves on macroporous resin and develop an efficient, simple and recyclable technology…

Abstract

Purpose

This paper aims to explore the adsorption kinetics of syringin from Syringa oblata Lindl. leaves on macroporous resin and develop an efficient, simple and recyclable technology for the separation and purification of syringin.

Design/methodology/approach

Static adsorption and desorption properties of six resins were tested to select a suitable resin for the purification of syringin. Langmuir and Freundlich isotherm models were used to estimate the adsorption behavior of syringin on AB-8 resin. Breakthrough point and eluent volume were determined by dynamic adsorption and desorption tests. High-performance liquid chromatography-electrospray ionization-mass spectrometry was applied to identify the syringin in the purified product [syringin product (SP)]. Antioxidant and antibacterial activities of SP in vitro were evaluated by free radical scavenging ability and biofilm formation inhibitory tests.

Findings

AB-8 exhibited the most suitable adsorption and desorption capacity. Adsorption isotherm parameters indicated favorable adsorption between AB-8 and syringin. The optimal results were as follows: for adsorption, the sample concentration was 1.85 mg/mL, the sample volume was 3.5 bed volume (BV), the flow rate was 0.5 mL/min; for desorption, the ethanol concentration was 70%, the elution volume was 2.5 BV, the elution velocity was 1.0 mL/min. SP with 80.28% syringin displayed the potent antioxidant activities and inhibitory effects on biofilm formation of Streptococcus suis.

Originality/value

To the best of authors’ knowledge, there are no reports on purifying syringin from Syringa oblata Lindl. leaves using macroporous resins. This paper may also provide a theoretical reference for the purification of other phenylpropanoid glucosides.

Details

Pigment & Resin Technology, vol. 51 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 13 July 2020

Navaneethakrishnan Kengatharan

Drawing on the role theory and work–family border theory, this study aims to examine the relationship between work/family demands and sui generis forms of work–family conflict and…

Abstract

Purpose

Drawing on the role theory and work–family border theory, this study aims to examine the relationship between work/family demands and sui generis forms of work–family conflict and further investigates the gender role ideology as a moderator of the relationship between work/family demands and work–family conflict.

Design/methodology/approach

The data were garnered with a self-reported questionnaire from randomly selected 569 employees working in the banking sector. As a caveat, nonresponse bias, common method variance and the reliability and validity of the measure were examined.

Findings

The results revealed that work demand and family demand were strongly related to both time- and strain-based work–family conflict; however, the relationship was not established with behavioural-based conflict. Notably, the findings affirmed the existence of a neglected form of psychological-based work–family conflict as the pièce de résistance and established a strong connection with its precursor. The dogma of gender role ideology, as a moderator, was indubitably confirmed and strengthened the positive relationship between family demand and family-to-work conflict.

Practical implications

The present study emphasises the importance of work/family demands and gender role ideology on work–family conflict. Consequently, it behoves human resource managers, strategists and practitioners to frame the organisational arrangements to alleviate the work–family conflict.

Originality/value

The present study fills a hiatus by establishing the relationship between work/family demand and work–family conflict with its cultural beliefs in the context of a collectivist culture.

Details

Journal of Advances in Management Research, vol. 17 no. 5
Type: Research Article
ISSN: 0972-7981

Keywords

Book part
Publication date: 24 May 2007

Frederic Carluer

“It should also be noted that the objective of convergence and equal distribution, including across under-performing areas, can hinder efforts to generate growth. Contrariwise

Abstract

“It should also be noted that the objective of convergence and equal distribution, including across under-performing areas, can hinder efforts to generate growth. Contrariwise, the objective of competitiveness can exacerbate regional and social inequalities, by targeting efforts on zones of excellence where projects achieve greater returns (dynamic major cities, higher levels of general education, the most advanced projects, infrastructures with the heaviest traffic, and so on). If cohesion policy and the Lisbon Strategy come into conflict, it must be borne in mind that the former, for the moment, is founded on a rather more solid legal foundation than the latter” European Commission (2005, p. 9)Adaptation of Cohesion Policy to the Enlarged Europe and the Lisbon and Gothenburg Objectives.

Details

Managing Conflict in Economic Convergence of Regions in Greater Europe
Type: Book
ISBN: 978-1-84950-451-5

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