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Article
Publication date: 1 November 2005

Qinglan Li, Jonathan Beaver, Ahmed Amer, Panos K. Chrysanthis, Alexandros Labrinidis and Ganesh Santhanakrishnan

Wireless sensor networks are expected to be an integral part of any pervasive computing environment. This implies an ever‐increasing need for efficient energy and resource…

150

Abstract

Wireless sensor networks are expected to be an integral part of any pervasive computing environment. This implies an ever‐increasing need for efficient energy and resource management of both the sensor nodes, as well as the overall sensor network, in order to meet the expected quality of data and service requirements. There have been numerous studies that have looked at the routing of data in sensor networks with the sole intention of reducing communication power consumption. However, there has been comparatively little prior art in the area of multi‐criteria based routing that exploit both the semantics of queries and the state of sensor nodes to improve network service longevity. In this paper, we look at routing in sensor networks from this perspective and propose an adaptive multi‐criteria routing protocol. Our algorithm offers automated reconfiguration of the routing tree as demanded by variations in the network state to meet application service requirements. Our experimental results show that our approach consistently outperforms, in terms of Network Lifetime and Coverage, the leading semantic‐based routing algorithm which reconfigures the routing tree at fixed periods.

Details

International Journal of Pervasive Computing and Communications, vol. 1 no. 4
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 20 March 2017

Qinglan Chen, Tor Eriksson and Luca Giustiniano

The purpose of this paper is to reveal the mediating role of leadership style on the relationship between strategy and company performance.

1198

Abstract

Purpose

The purpose of this paper is to reveal the mediating role of leadership style on the relationship between strategy and company performance.

Design/methodology/approach

The study uses empirical data gathered from top managers in a stratified sample of 476 Danish private businesses.

Findings

The results show the mediating effects of leadership styles on strategic performance. In particular, both supportive and directive leadership styles partially mediate the effect of the differentiation strategy, while the supportive leadership style displays a stronger mediating effect than the directive one. The multi-group analysis shows the moderating impact of the manager’s tenure, managerial level, strategy clarity, industry and business environment risk.

Research limitations/implications

The study is limited by its nature and the specificity of the national context in which it was conducted. In this vein, the evidence collected here can be enlarged and complemented by having access to panel data or the generalization of some results to neighboring or other developed countries.

Practical implications

Several implications of the findings for managerial practices are discussed.

Originality/value

There are very few discussions of the mediating effect of leadership style between strategy and performance. The paper fills the gap by examining the role of leadership style planning on the relationship between those two variables in Denmark.

Details

Management Decision, vol. 55 no. 2
Type: Research Article
ISSN: 0025-1747

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Article
Publication date: 1 November 2022

Qian Tang, Yuzhuo Qiu and Lan Xu

The demand for the cold chain logistics of agricultural products was investigated through demand forecasting; targeted suggestions and countermeasures are provided. This paper…

433

Abstract

Purpose

The demand for the cold chain logistics of agricultural products was investigated through demand forecasting; targeted suggestions and countermeasures are provided. This paper aims to discuss the aforementioned statement.

Design/methodology/approach

A Markov-optimised mean GM (1, 1) model is proposed to forecast the demand for the cold chain logistics of agricultural products. The mean GM (1, 1) model was used to forecast the demand trend, and the Markov chain model was used for optimisation. Considering Guangxi province as an example, the feasibility and effectiveness of the proposed method were verified, and relevant suggestions are made.

Findings

Compared with other models, the Markov-optimised mean GM (1, 1) model can more effectively forecast the demand for the cold chain logistics of agricultural products, is closer to the actual value and has better accuracy and minor error. It shows that the demand forecast can provide specific suggestions and theoretical support for the development of cold chain logistics.

Originality/value

This study evaluated the development trend of the cold chain logistics of agricultural products based on the research horizon of demand forecasting for cold chain logistics. A Markov-optimised mean GM (1, 1) model is proposed to overcome the problem of poor prediction for series with considerable fluctuation in the modelling process, and improve the prediction accuracy. It finds a breakthrough to promote the development of cold chain logistics through empirical analysis, and give relevant suggestions based on the obtained results.

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Article
Publication date: 10 April 2017

Haiyan Qian, Allan Walker and Xiaojun Li

The purpose of this paper is to develop a preliminary model of instructional leadership in the Chinese educational context and explore the ways in which Chinese school principals…

3126

Abstract

Purpose

The purpose of this paper is to develop a preliminary model of instructional leadership in the Chinese educational context and explore the ways in which Chinese school principals locate their instructional-leadership practices in response to traditional expectations and the requirements of recent reforms.

Design/methodology/approach

In-depth interviews were conducted with 22 selected primary school principals in Shenzhen and Guangzhou. A qualitative analysis was conducted to categorize the major leadership practices enacted by these principals.

Findings

An initial model of instructional leadership in China with six major dimensions is constructed. The paper also illustrates and elaborates on three dimensions with the greatest context-specific meanings for Chinese principals.

Originality/value

The paper explores the ways in which Chinese principals enact their instructional leadership in a context in which “the west wind meets the east wind”; that is, when they are required to accommodate both imported reform initiatives and traditional expectations. The paper contributes to the sparse existing research on principals’ instructional leadership in non-western cultural and social contexts.

Details

Journal of Educational Administration, vol. 55 no. 2
Type: Research Article
ISSN: 0957-8234

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Article
Publication date: 7 December 2021

Sriram K.V. and Sumukh Hungund

This study aims to analyze the influence of inbound and outbound open innovation practices on firm performance among Indian product small and medium-sized enterprises.

557

Abstract

Purpose

This study aims to analyze the influence of inbound and outbound open innovation practices on firm performance among Indian product small and medium-sized enterprises.

Design/methodology/approach

A cross-sectional design with a quantitative approach is adopted. The data is collected from 213 decision-makers of software product firms through an online survey using the criteria-based snowball sampling method. The data is processed in IBM SPSS 23.0 and analyzed using multiple regression.

Findings

Collaboration with customers and purchasing intellectual property rights (IPR) are the key inbound practices that positively influence firm performance. Outbound innovation practices such as selling out IPR and spin-off influence firm performance negatively and positively, respectively. Inbound open innovation practice such as trade show participation helps in product development and outbound open innovation practice such as spin-off helps in product development.

Originality/value

The study analyses the influences of inbound and outbound open innovation practices on firm performance among software product firms in emerging economies. The research outcomes have vast implications for theory and practitioners.

Details

International Journal of Innovation Science, vol. 14 no. 5
Type: Research Article
ISSN: 1757-2223

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Article
Publication date: 13 September 2021

Ruoshi Geng, Ruijie Sun, Jie Li, Fan Guo, Wangshuai Wang and Gong Sun

This paper examined the relationship between firm innovativeness and consumer trust in the sharing economy. In addition, the authors examine the mediating effect of organizational…

1271

Abstract

Purpose

This paper examined the relationship between firm innovativeness and consumer trust in the sharing economy. In addition, the authors examine the mediating effect of organizational legitimacy and the moderating effect of social worth.

Design/methodology/approach

To examine the hypotheses, the authors collected data from 276 users of a sharing platform (Didi) in China to conduct empirical research. The “lavaan” packages in R and SPSS were used to analyze the data and test the proposed hypotheses.

Findings

The results reveal that sharing platforms' innovativeness is positively related to consumer trust, and this relationship is mediated by organizational legitimacy. Furthermore, sharing platforms' social worth moderates the relationship between firm innovativeness and organizational legitimacy as well as the indirect effect of firm innovativeness on consumer trust via organizational legitimacy.

Practical implications

This article proposes strategies that enable sharing platforms to increase consumer trust, which can also better promote the development of the sharing economy.

Originality/value

This paper contributes to the literature by focusing on the social attributes of the sharing economy. By building a more detailed model of consumer trust, this paper adds to the knowledge on the influencing mechanism of consumer trust in the sharing economy.

Details

Asia Pacific Journal of Marketing and Logistics, vol. 34 no. 5
Type: Research Article
ISSN: 1355-5855

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Article
Publication date: 27 August 2021

Jianzhong Cui, Hu Li, Dong Zhang, Yawen Xu and Fangwei Xie

The purpose of this study is to investigate the flexible dynamic characteristics about hydro-viscous drive providing meaningful insights into the credible speed-regulating…

101

Abstract

Purpose

The purpose of this study is to investigate the flexible dynamic characteristics about hydro-viscous drive providing meaningful insights into the credible speed-regulating behavior during the soft-start.

Design/methodology/approach

A comprehensive dynamic transmission model is proposed to investigate the effects of key parameters on the dynamic characteristics. To achieve a trade-off between the transmission efficiency and time proportion of hydrodynamic and mixed lubrication, a multi-objective optimization of friction pair system by genetic algorithm is presented to obtain the optimal combination of design parameters.

Findings

Decreasing the engagement pressure or the ratio of inner and outer radius, increasing the lubricating oil viscosity or the outer radius will result in the increase of time proportion of hydrodynamic and mixed lubrication, as well as the transmission efficiency and its maximum value. After optimization, main dynamic parameters including the oil film thickness, angular velocity of the driven disk, viscous torque and total torque show remarkable flexible transmission characteristics.

Originality/value

Both the dynamic transmission model and multi-objective optimization model are established to analyze the effects of main design parameters on the dynamic characteristics of hydro-viscous flexible drive.

Details

Industrial Lubrication and Tribology, vol. 73 no. 7
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 17 May 2021

Xiaozhong Tang, Naiming Xie and Aqin Hu

Accurate foreign tourist arrivals forecasting can help public and private sectors to formulate scientific tourism planning and improve the allocation efficiency of tourism…

198

Abstract

Purpose

Accurate foreign tourist arrivals forecasting can help public and private sectors to formulate scientific tourism planning and improve the allocation efficiency of tourism resources. This paper aims to address the problem of low prediction accuracy of Chinese inbound tourism demand caused by the lack of valid historical data.

Design/methodology/approach

A novel hybrid Chinese inbound tourism demand forecasting model combining fractional non-homogenous discrete grey model and firefly algorithm is constructed. In the proposed model, all adjustable parameters of the fractional non-homogenous discrete grey model are optimized simultaneously by the firefly algorithm.

Findings

The data sets of annual foreign tourist arrivals to China are used to verify the validity of the proposed model. Experimental results show that the proposed method is effective and can be used as a useful predictor for the prediction of Chinese inbound tourism demand.

Originality/value

The method proposed in this paper is effective and can be used as a feasible approach for forecasting the development trend of Chinese inbound tourism.

Details

Kybernetes, vol. 51 no. 2
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 15 December 2022

Xiuying Wang, Yu Chen, Kai Ding and Chengtao Yu

This study aims to obtain a design scheme of the surface texture on mechanical seal with lower friction and leakage by comparing two common texture types: dimples and grooves.

150

Abstract

Purpose

This study aims to obtain a design scheme of the surface texture on mechanical seal with lower friction and leakage by comparing two common texture types: dimples and grooves.

Design/methodology/approach

An optimal free-form shape and an optimal circular shape were chosen by multi-objective optimization, and two types of grooves with different directions were chosen by a series of experiments. Then, the optimal free-form dimple, the optimal circular dimple, the groove perpendicular to the direction of movement (hereafter called groove-1) and the groove angled at 60° to the direction of movement (hereafter called groove-2) were compared by experiments under different loads.

Findings

The optimal free-form dimple shows a better performance in terms of a lower coefficient of friction (COF) and a lower leakage than the other shapes, especially for the high speed and low load conditions. The reduction rate of COF is up to 37.5%, and the leakage rate is reduced by about 12.5%. The dimples have a lower leakage than the grooves. The groove angled at 60° to the direction of movement is easier to pump the oil into the interface of the sealing face, leading to a lower friction but a higher leakage.

Originality/value

This study provides a feasible surface texture design scheme for improving the combination performance of mechanical seals.

Details

Industrial Lubrication and Tribology, vol. 75 no. 2
Type: Research Article
ISSN: 0036-8792

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Article
Publication date: 4 December 2020

Yuquan Wang and Naiming Xie

purpose of this paper is providing a solution for flexible flow shop scheduling problem with uncertain processing time in aeronautical composite lay-up workshop.

384

Abstract

Purpose

purpose of this paper is providing a solution for flexible flow shop scheduling problem with uncertain processing time in aeronautical composite lay-up workshop.

Design/methodology/approach

A flexible flow scheduling model and algorithm with interval grey processing time is established. First, according to actual needs of composite laminate shop scheduling process, interval grey number is used to represent uncertain processing time, and interval grey processing time measurement method, grey number calculation and comparison rules, grey Gantt chart, and other methods are further applied. Then a flexible flow shop scheduling model with interval grey processing time (G-FFSP) is established, and an artificial bee colony algorithm based on an adaptive neighbourhood search strategy is designed to solve the model. Finally, six examples are generated for simulation scheduling, and the efficiency and performance of the model and algorithm are evaluated by comparing the results.

Findings

Results show that flexible flow shop scheduling model and algorithm with interval grey processing time can provide an optimal solution for composite lay-up shop scheduling problems and other similar flow shop scheduling problems.

Social implications

Uncertain processing time is common in flexible workshop manufacturing, and manual scheduling greatly restricts the production efficiency of workshop. In this paper, combined with grey system theory, an intelligent algorithm is used to solve flexible flow shop scheduling problem to promote intelligent and efficient production of enterprises.

Originality/value

This paper applies and perfects interval grey processing time measurement method, grey number calculation and comparison rules, grey Gantt chart and other methods. A flexible flow shop scheduling model with interval grey processing time is established, and an artificial bee colony algorithm with an adaptive domain search strategy is designed. It provides a comprehensive solution for flexible flow shop scheduling with uncertain processing time.

Details

Grey Systems: Theory and Application, vol. 11 no. 4
Type: Research Article
ISSN: 2043-9377

Keywords

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