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1 – 10 of over 8000
Article
Publication date: 1 September 2015

WU Jinxiu, Zhang Meiying and Zhao Lin

High comfort and low energy consumption communities have become an important topic for community planning & design in China. Considering the special situation in China…

Abstract

High comfort and low energy consumption communities have become an important topic for community planning & design in China. Considering the special situation in China, the meaning of high comfort and low energy consumption communities lies in three aspects: making utmost use of natural climatic conditions, providing enjoyable indoor and outdoor living environments in circumstances of high-rise and high-density development, and holistic design of adjacent dwelling units to provide utmost flexibility. This paper uses design proposals for two real projects in two different cities in China - one in Yixing in South China and another one in Harbin in north China - as examples of how to design high comfort and low energy consumption communities by following local climatological factors and by respecting occupants’ needs in the long run. This paper shows that such communities can be planned in two steps, with special attention to the local climate. First, climatically responsive site planning determines building layout, height of each part, and also the design of open spaces. Second, detailed planning & design addresses the disadvantages of the site, improving space quality. Following local climatological conditions is also one of the key issues in housing design for high comfort & low energy consumption communities. In the housing design of the Harbin project, besides consideration to climate, special attention was also given to flexible/variable dwelling unit design according to occupants’ long-term needs. The “1+1 mode” is put forward to provide utmost flexibility for families with 3 generations for their current and future lives.

Details

Open House International, vol. 40 no. 3
Type: Research Article
ISSN: 0168-2601

Keywords

Book part
Publication date: 5 October 2018

Nasir Bedewi Siraj, Aminah Robinson Fayek and Mohamed M. G. Elbarkouky

Most decision-making problems in construction are complex and difficult to solve, as they involve multiple criteria and multiple decision makers in addition to subjective…

Abstract

Most decision-making problems in construction are complex and difficult to solve, as they involve multiple criteria and multiple decision makers in addition to subjective uncertainties, imprecisions and vagueness surrounding the decision-making process. In many instances, the decision-making process is based on linguistic terms rather than numerical values. Hence, structured fuzzy consensus-reaching processes and fuzzy aggregation methods are instrumental in multi-criteria group decision-making (MCGDM) problems for capturing the point of view of a group of experts. This chapter outlines different fuzzy consensus-reaching processes and fuzzy aggregation methods. It presents the background of the basic theory and formulation of these processes and methods, as well as numerical examples that illustrate their theory and formulation. Application areas of fuzzy consensus reaching and fuzzy aggregation in the construction domain are identified, and an overview of previously developed frameworks for fuzzy consensus reaching and fuzzy aggregation is provided. Finally, areas for future work are presented that highlight emerging trends and the imminent needs of fuzzy consensus reaching and fuzzy aggregation in the construction domain.

Details

Fuzzy Hybrid Computing in Construction Engineering and Management
Type: Book
ISBN: 978-1-78743-868-2

Keywords

Article
Publication date: 18 April 2017

Swee Leong Sing, Wai Yee Yeong, Florencia Edith Wiria, Bee Yen Tay, Ziqiang Zhao, Lin Zhao, Zhiling Tian and Shoufeng Yang

This paper aims to provide a review on the process of additive manufacturing of ceramic materials, focusing on partial and full melting of ceramic powder by a high-energy…

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Abstract

Purpose

This paper aims to provide a review on the process of additive manufacturing of ceramic materials, focusing on partial and full melting of ceramic powder by a high-energy laser beam without the use of binders.

Design/methodology/approach

Selective laser sintering or melting (SLS/SLM) techniques are first introduced, followed by analysis of results from silica (SiO2), zirconia (ZrO2) and ceramic-reinforced metal matrix composites processed by direct laser sintering and melting.

Findings

At the current state of technology, it is still a challenge to fabricate dense ceramic components directly using SLS/SLM. Critical challenges encountered during direct laser melting of ceramic will be discussed, including deposition of ceramic powder layer, interaction between laser and powder particles, dynamic melting and consolidation mechanism of the process and the presence of residual stresses in ceramics processed via SLS/SLM.

Originality/value

Despite the challenges, SLS/SLM still has the potential in fabrication of ceramics. Additional research is needed to understand and establish the optimal interaction between the laser beam and ceramic powder bed for full density part fabrication. Looking into the future, other melting-based techniques for ceramic and composites are presented, along with their potential applications.

Details

Rapid Prototyping Journal, vol. 23 no. 3
Type: Research Article
ISSN: 1355-2546

Keywords

Open Access
Article
Publication date: 16 October 2017

Yingfeng Zhang, Lin Zhao and Cheng Qian

The huge demand for fresh goods has stimulated lots of research on the perishable food supply chain. The characteristics of perishable food and the cross-regional…

10349

Abstract

Purpose

The huge demand for fresh goods has stimulated lots of research on the perishable food supply chain. The characteristics of perishable food and the cross-regional transportation have brought many challenges to the operation models of perishable food supply chain. The purpose of this paper is to address these challenges based on the real-time data acquired by the Internet of Things (IoT) devices.

Design/methodology/approach

IoT and the modeling of the Supply Hub in Industrial Parks were adopted in the perishable food supply chain.

Findings

A conceptual model was established for the IoT-enabled perishable food supply chain with two-echelon supply hubs. The performance of supply chain has improved when implementing the proposed model, as is demonstrated by a case study.

Originality/value

By our model, the supply hubs which act as the dominators of the supply chain can respond to the real-time information captured from the operation processes of an IoT-enabled supply chain, thus to provide public warehousing and logistic services.

Details

Industrial Management & Data Systems, vol. 117 no. 9
Type: Research Article
ISSN: 0263-5577

Keywords

Article
Publication date: 29 November 2017

Guiwu Wei

The purpose of this paper is to develop some picture uncertain linguistic aggregation operators based on Bonferroni mean operators, which is combined with multiple…

Abstract

Purpose

The purpose of this paper is to develop some picture uncertain linguistic aggregation operators based on Bonferroni mean operators, which is combined with multiple attribute decision-making (MADM) and has applied the proposed MADM model for selecting the service outsourcing provider of communications industry under picture uncertain linguistic environment.

Design/methodology/approach

The service outsourcing provider selection problem of communications industry can be regarded as a typical MADM problem, in which the decision information should be aggregated. In this paper, the authors investigate the MADM problems with picture uncertain linguistic information based on traditional Bonferroni mean operator.

Findings

The results show that the proposed model can solve the MADM problems within the context of picture uncertain linguistic information, in which the attributes are existing interaction phenomenon. Some picture uncertain aggregation operators based on Bonferroni mean have been developed. A case study of service outsourcing provider selection problem of communications industry is provided to illustrate the effectiveness and feasibility of the proposed methods. The results show that the proposed methods are useful to aggregate the picture uncertain linguistic decision information in which the attributes are not independent so as to select the most suitable supplier.

Research limitations/implications

The proposed methods can solve the picture uncertain linguistic MADM problem, in which the interactions exist among the attributes. Therefore, it can be used to solve service outsourcing provider selection problems and other similar management decision problems.

Practical implications

This paper develops some picture uncertain aggregation operators based on Bonferroni mean and further presents two methods based on the proposed operators for solving MADM problems. It is useful to deal with multiple attribute interaction decision-making problems and suitable to solve a variety of management decision-making applications.

Social implications

It is useful to deal with multiple attribute interaction decision-making problems and suitable to solve a variety of management decision-making applications.

Originality/value

The paper investigates the MADM problems with picture uncertain linguistic information based on traditional Bonferroni mean operator and develops the picture uncertain linguistic Bonferroni mean operator and picture uncertain linguistic geometric Bonferroni mean operator, picture uncertain linguistic weighted Bonferroni mean operator and picture uncertain linguistic weighted geometric Bonferroni mean operator for aggregating the picture uncertain linguistic information, respectively. Finally, a numerical example concerning the service outsourcing provider selection problem of communications industry is provided to illustrate the effectiveness and feasibility of the proposed methods.

Article
Publication date: 27 November 2019

Tuyet-Mai Nguyen

This study aims to examine the relationship between intrinsic motivation and online knowledge sharing intentions (KSIs) and the moderating effect of extrinsic motivation…

1280

Abstract

Purpose

This study aims to examine the relationship between intrinsic motivation and online knowledge sharing intentions (KSIs) and the moderating effect of extrinsic motivation and organisational culture on this relationship. The influence of online KSI on two dimensions of online knowledge sharing behaviour, knowledge donating and knowledge collecting, was also investigated.

Design/methodology/approach

Based on the extensive literature review, a questionnaire was designed. In total, 290 questionnaires from employees in Vietnamese companies in the banking and insurance industry were collected and tested using structural equation modelling. Statistical analysis was conducted using SPSS and PLS 3 software to examine the research hypotheses.

Findings

This study found that rewards and reciprocity undermined the influence of self-enjoyment on online KSI, while top management support and social interaction ties undermined the relationship between self-efficacy and online KSI. Top management support positively moderated the effect of self-enjoyment on online KSI. The results also suggested that online KSI was a good predictor of online knowledge donating and collecting.

Originality/value

Little is empirically known about the moderating effect of extrinsic motivation and organizational culture on intrinsic motivation. The study brings new insights to further understand about online knowledge sharing in an organisation.

Details

VINE Journal of Information and Knowledge Management Systems, vol. 50 no. 1
Type: Research Article
ISSN: 2059-5891

Keywords

Article
Publication date: 1 November 2009

Lin Lin, Yali Zhao, Masato Ogawa and John D. Hoge

Comparing international history textbooks creates a perfect opportunity for students to see the complexity and controversy of history interpretation of certain events…

Abstract

Comparing international history textbooks creates a perfect opportunity for students to see the complexity and controversy of history interpretation of certain events. Such a critical comparative approach helps students understand how people in different countries perceive and interpret the Korean War, its aftermath, and its effects on current international relation-ships. In this article, we suggest that teachers approach the Korean War and the Six-Party Talks in two ways: Six-Party Discussion Table motivation activities and analysis of middle school history textbook excerpts about the Korean War in the six countries. Detailed lesson plans and handouts are provided for teachers to facilitate these discussions. These include the directions and procedures for the activities, teachers' guide, suggested answers, textbook excerpts from the United States, and textbook excerpts translated into English China, Japan, Russia, North Korea, and South Korea.

Details

Social Studies Research and Practice, vol. 4 no. 3
Type: Research Article
ISSN: 1933-5415

Article
Publication date: 29 October 2019

Yanhong Chen, Yaobin Lu, Sumeet Gupta and Zhao Pan

Social shopping website (SSW) introduce the social side into the shopping process, thus making “window” shopping or browsing more interesting for customers. The purpose of…

1450

Abstract

Purpose

Social shopping website (SSW) introduce the social side into the shopping process, thus making “window” shopping or browsing more interesting for customers. The purpose of this paper is to investigate customer online browsing experience and its antecedents (i.e. information quality and social interaction) and consequences (i.e. urge to buy impulsively and continuous browsing intention) in the context of SSW.

Design/methodology/approach

A survey questionnaire was distributed to visitors of online SSW to collect data, and partial least squares technology was used to test the research model.

Findings

The results of this study reveal that three types of web browsing, namely, utilitarian browsing, hedonic browsing and social browsing, take place in a SSW. The unique factors of SSW, namely, the quality of user generated contents and social interaction are critical for facilitating customers’ browsing experiences. Furthermore, the findings reveal that hedonic browsing experience is found to be the most salient factor influencing customers’ urge to buy impulsively and continuance intention.

Practical implications

The findings suggest that practitioners, such as designers and managers of SSW should give special attention to the benefits of browsing activity to convert web browsers into impulse purchasers and increase customers’ loyalty. Moreover, they should focus on improving the quality of user generated content and pay more attention to support and encourage social interaction to enhance browsing experiences on a SSW.

Originality/value

Existing studies about browsing behavior mostly focus on traditional online e-commerce website. This study represents the first step toward understanding browsing activity on SSW. Moreover, prior studies mainly focused on utilitarian and hedonic browsing experience; however, there is a lack of research on social browsing experience. The current study attempts to fill this research gap.

Details

Information Technology & People, vol. 33 no. 4
Type: Research Article
ISSN: 0959-3845

Keywords

Article
Publication date: 2 July 2020

Jia-Jia Zhao, Ming-Xing Lin, Xian-Chun Song and Nan Wei

This paper aims to provide thermal elastohydrodynamic lubrication (TEHL) contact model to study all balls’ lubrication performance of the ball screw when the…

Abstract

Purpose

This paper aims to provide thermal elastohydrodynamic lubrication (TEHL) contact model to study all balls’ lubrication performance of the ball screw when the multidirectional load is applied.

Design/methodology/approach

A new TEHL contact model combining the multidirectional load and the roughness surface texture is established to describe fatigue life of the ball screw. Meanwhile, the authors use the Reynolds equation to study the lubrication performance of the ball screw.

Findings

When the multidirectional load is applied, contact load, slide-roll ratio and entrainment velocity of all balls have a periodic shape. The TEHL performance values at the ball-screw contact points including contact stress, shear stress, minimum film thickness and temperature rise are higher than that at the ball-nut contact points. The TEHL performance values increase with the increase of root mean square (RMS) except for the film thickness. In addition, the radial load of the ball screw has a significant effect on the fatigue life.

Originality/value

The results of the studies demonstrate the new TEHL contact model that provides the instructive significance to analyze the fatigue life of the ball screw under the multidirectional load.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2020-0097/

Details

Industrial Lubrication and Tribology, vol. 72 no. 10
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 4 January 2022

Yuyu Hao, Shugang Li and Tianjun Zhang

In this study, a physical similarity simulation plays a significant role in the study of crack evolution and the gas migration mechanism. A sensor is deployed inside a…

Abstract

Purpose

In this study, a physical similarity simulation plays a significant role in the study of crack evolution and the gas migration mechanism. A sensor is deployed inside a comparable artificial rock formation to assure the accuracy of the experiment results. During the building of the simulated rock formation, a huge volume of acidic gas is released, causing numerous sensor measurement mistakes. Additionally, the gas concentration estimation approach is subject to uncertainty because of the complex rock formation environment. As a result, the purpose of this study is to introduce an adaptive Kalman filter approach to reduce observation noise, increase the accuracy of the gas concentration estimation model and, finally, determine the gas migration law.

Design/methodology/approach

First, based on the process of gas floatation-diffusion and seepage, the gas migration model is established according to Fick’s second law, and a simplified modeling method using diffusion flux instead of gas concentration is presented. Second, an adaptive Kalman filter algorithm is introduced to establish a gas concentration estimation model, taking into account the model uncertainty and the unknown measurement noise. Finally, according to a large-scale physical similarity simulation platform, a thorough experiment about gas migration is carried out to extract gas concentration variation data with certain ventilation techniques and to create a gas chart of the time-changing trend.

Findings

This approach is used to determine the changing process of gas distribution for a certain ventilation mode. The results match the rock fissure distribution condition derived from the microseismic monitoring data, proving the effectiveness of the approach.

Originality/value

For the first time in large-scale three-dimensional physical similarity simulations, the adaptive Kalman filter data processing method based on the inverse Wishart probability density function is used to solve the problem of an inaccurate process and measurement noise, laying the groundwork for studying the gas migration law and determining the gas migration mechanism.

Details

Assembly Automation, vol. 42 no. 1
Type: Research Article
ISSN: 0144-5154

Keywords

1 – 10 of over 8000