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1 – 9 of 9Weijian Huang, Pei Niu and Wei Du
Parallel processing technology was applied to accelerate the calculation speed of the water quality forecasting model. The parallel algorithm proposed was based on the…
Abstract
Parallel processing technology was applied to accelerate the calculation speed of the water quality forecasting model. The parallel algorithm proposed was based on the message-passing interface (MPI). It mainly aims at enhancing the computation speed of the water quality forecasting model of Jiaozhou Bay, and decomposes the material transport issue into many sub-duties. The model was run in a MPI message cluster system. The result indicates that, by using this method, the computation efficiency for solving material transportation module is increased by approximately more than 60%.
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Hongyu Zhao, Zhelong Wang, Hong Shang, Weijian Hu and Gao Qin
The purpose of this paper is to reduce the calculation burden and speed up the estimation process of Allan variance method while ensuring the exactness of the analysis results.
Abstract
Purpose
The purpose of this paper is to reduce the calculation burden and speed up the estimation process of Allan variance method while ensuring the exactness of the analysis results.
Design/methodology/approach
A series of six‐hour static tests have been implemented at room temperature, and the static measurements have been collected from MEMS IMU. In order to characterize the various types of random noise terms for the IMU, the basic definition and main procedure of the Allan variance method are investigated. Unlike the normal Allan variance method, which has the shortcomings of processing large data sets and requiring long computation time, a modified Allan variance method is proposed based on the features of data distribution in the log‐log plot of the Allan standard deviation versus the averaging time.
Findings
Experiment results demonstrate that the modified Allan variance method can effectively estimate the noise coefficients for MEMS IMU, with controllable computation time and acceptable estimation accuracy.
Originality/value
This paper proposes a time‐controllable Allan variance method which can quickly and accurately identify different noise terms imposed by the stochastic fluctuations.
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This paper seeks to historically examine social development outcomes in the Tibet Autonomous Region (TAR) in respect to poverty eradication, education and employment, health care…
Abstract
Purpose
This paper seeks to historically examine social development outcomes in the Tibet Autonomous Region (TAR) in respect to poverty eradication, education and employment, health care and social integration. Moreover, it will aims to offer tangible advice for improving future social development work in TAR.
Design/methodology/approach
The main theoretical approach is a literature and policy review of social development in TAR from 1951 to present.
Findings
Seemingly, Tibet's social development strategy has been achieved through a strong top‐down approach. However, the road ahead for TAR once basic needs are satisfactorily met, is a move towards a participatory approach, whereby Tibetans can directly contribute and have a stake in their own futures.
Originality/value
This paper will be of interest to those who want a definitive account of recent historical social development strategies and outcomes in TAR; and subsequently, the future possibilities and challenges for development in the region.
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Weijian Mi, Wei Yan, Junliang He and Daofang Chang
The purpose of this paper is to propose a yard allocation model via objective programming. This is initially postulated based on a rolling‐horizon strategy, which aims at…
Abstract
Purpose
The purpose of this paper is to propose a yard allocation model via objective programming. This is initially postulated based on a rolling‐horizon strategy, which aims at allotting outbound containers into yard.
Design/methodology/approach
To resolve the NP‐hard problem regarding the yard allocation model, a hybrid algorithm, which applies heuristic rules and distributed genetic algorithm (DGA), is then employed.
Findings
It could be observed from the case study that this proposed approach is proven effective for resolving the container yard allocation problem. The total loading time onto vessels, the total horizontal transportation distance and the imbalance among blocks are improved.
Research limitations/implications
This paper does not deal with equipment scheduling.
Practical implications
This approach helps to minimize turnaround time; handling cost of vessels; the workloads among blocks are balanced for each vessel; and the total distance of container transportation.
Originality/value
This paper designs a hybrid algorithm, which integrates heuristic rules and DGA. In details, the heuristic rules are developed for generating feasible solutions, while the DGA was applied for optimizing these solutions.
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Asli Özdemir and Güzin Özdagoglu
Prediction problems raised in uncertain environments require different solution approaches such as grey prediction models, which consider uncertainty in information and also…
Abstract
Purpose
Prediction problems raised in uncertain environments require different solution approaches such as grey prediction models, which consider uncertainty in information and also enable the use of small data sets. The purpose of this paper is to investigate the comparative performances of grey prediction models (GM) and Markov chain integrated grey models in a demand prediction problem.
Design/methodology/approach
The modeling process of grey models is initially described, and then an integrated model called the Grey-Markov model is presented for the convenience of applications. The analyses are conducted on a monthly demand prediction problem to demonstrate the modeling accuracies of the GM (1,1), GM (2,1), GM (1,1)-Markov, and GM (2,1)-Markov models.
Findings
Numerical results reveal that the Grey-Markov model based on GM (2,1) achieves better prediction performance than the other models.
Practical implications
It is thought that the methodology and the findings of the study will be a significant reference for both academics and executives who struggle with similar demand prediction problems in their fields of interest.
Originality/value
The novelty of this study comes from the fact that the GM (2,1)-Markov model has been first used for demand prediction. Furthermore, the GM (2,1)-Markov model represents a relatively new approach, and this is the second paper that addresses the GM (2,1)-Markov model in any area.
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Ann Veeck, Hongyan Yu, Hongli Zhang, Hong Zhu and Fang (Grace) Yu
The purpose of this study is to explore the association between eating patterns, social identity and the well-being of adolescents via a mixed methods study of Chinese teenagers…
Abstract
Purpose
The purpose of this study is to explore the association between eating patterns, social identity and the well-being of adolescents via a mixed methods study of Chinese teenagers. The specific research questions presented in this study are as follows: What is the relationship between social eating and well-being? How is the relationship between social eating and well-being mediated by social identity?
Design/methodology/approach
This study is based on a sequential mixed methods study, including interviews with 16 teenage–parent dyads, and a large-scale survey of over 1,000 teenagers on their eating patterns, conducted with the support of public schools. A model that tests relationships among social eating, social identity and subjective well-being is developed and tested.
Findings
The results show that dining with family members leads to improved subjective well-being for teenagers, through a partial mediator of stronger family identity. However, dining with peers is not found to influence subjective well-being.
Research limitations/implications
The privileged position of family meals demonstrated through this study may be an artifact of the location of this study in one Chinese city. Further research is needed related to the connections among social identity, objective well-being and the social patterns of teenagers’ food consumption behavior.
Practical implications
To improve the subjective well-being of teenagers, families, public policy-makers and food marketers should support food consumption patterns that promote family meals.
Originality/value
While many food-related consumer studies focus on the individual, social and environmental influences of food choices of adolescents, few studies address how eating patterns affect overall well-being. These results reinforce the importance of understanding the effect of the social context of teenagers’ eating patterns on health and well-being.
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W.K. Kon, Noorul Shaiful Fitri Abdul Rahman, Rudiah Md Hanafiah and Saharuddin Abdul Hamid
Since the first automated container terminal (ACT) was introduced at Europe Container Terminals Delta Terminal in Port Rotterdam back in the year 1992, a lot of research had been…
Abstract
Purpose
Since the first automated container terminal (ACT) was introduced at Europe Container Terminals Delta Terminal in Port Rotterdam back in the year 1992, a lot of research had been done to improve the management of ACT. However, up until recently, the number of literature available still appeared scarce. Hence, this paper aims to review the collection of literature about ACT to generate an exhaustive summary to answer the formulated review question in this study.
Design/methodology/approach
Preferred reporting items for systematic reviews and meta-analyses to narrow down the search parameters of literature retrieved so that only relevant articles were only selected. The systematic literature reviews were applied to analyse the content of the articles retrieved to determine its journal ranking, research findings and timeline of publications.
Findings
The adoption of ACT technology by container terminal operators could increase the terminal efficiency in productivity, cost reduction and environmental sustainability. Owing to global environmental awareness, the research trend of container terminal field and container terminal operator in the terminal design is much more environmentally friendly oriented.
Research limitations/implications
The limited numbers of experts in the management of ACT are causing challenges in data collections.
Practical implications
The analysis of the global ACT trend could help academicians and industrial investors to review the revolution timeline of maritime technology in port and shipping that is happening rapidly.
Originality/value
The analysis of timeline and collective literature leads to the propose of the conceptual framework to determine the relationship between increased productivity, cost reduction and environmentally sustainable.
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Chen Wang, Fengqiu Zou, Jeffrey Boon Hui Yap, Lincoln C. Wood, Heng Li and Linghua Ding
The production of sleeve grouting in prefabricated construction is routinely plagued by a variety of factors, and lack of mass data and complex environmental conditions over time…
Abstract
Purpose
The production of sleeve grouting in prefabricated construction is routinely plagued by a variety of factors, and lack of mass data and complex environmental conditions over time make problems inevitable. Thus, a dynamic risk control system is a valuable support for the successful completion of the sleeve grouting process. This study aims to develop an entropy-based sleeve grouting risk dynamic control system.
Design/methodology/approach
First, static risk assessment was conducted through the structured interview survey using the entropy weight method, followed by a dynamic risk control technique, where indicators were simulated through system dynamics containing causal loop diagrams and stock-and-flow diagrams.
Findings
Finally, three types of risk control models, namely, “tortuous type”, “stable type” and “peak loop type”, were developed in the entropy-based sleeve grouting risk dynamic control system and simulated using system dynamics in a real case.
Originality/value
Compared to traditional sleeve grouting risk management, the developed system enabled dynamic control over time.
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The present study aimed to present a structural model of the relationships between personality traits, metacognitive awareness, creativity and academic achievement in virtual…
Abstract
Purpose
The present study aimed to present a structural model of the relationships between personality traits, metacognitive awareness, creativity and academic achievement in virtual students.
Design/methodology/approach
The statistical population of the study consisted of all students of the electronic Islamic Azad University in Tehran, where 240 of them were selected as sample group by random sampling method. Research instruments included the short form of the Creative Behavior Inventory (Linger), the Metacognitive Awareness Questionnaire (Schraw and Dennison) and NEO Personality Inventory (McCrae and Costa). Data were analyzed using LISERL software and the path analysis method.
Findings
The findings indicated a mediating role of metacognitive awareness and creativity in the relationship between extraversion, openness to experience and conscientiousness personality traits with academic performance. It was also found that metacognitive awareness has a direct, significant positive effect on creativity.
Originality/value
According to the results of the present study, the level of creativity in virtual students can be developed through training and strengthening meta-cognitive skills. The findings also suggest that meta-cognition and creativity are traits that can have intrinsic and personality roots.
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