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Mudan Wang

Bio: Mudan Wang is an academic researcher from University of New South Wales. The author has contributed to research in topics: Prefabrication & Augmented reality. The author has an hindex of 4, co-authored 7 publications receiving 112 citations. Previous affiliations of Mudan Wang include Huazhong University of Science and Technology.

Papers
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Journal ArticleDOI
TL;DR: This review formulates a clear picture of the current practice of these digital technologies and summarizes the main area of application and limitations of each technology when utilized in OSC.
Abstract: Off-site construction (OSC) is known as an efficient construction method that could save time and cost, reduce waste of resources, and improve the overall productivity of projects. Coupled with digital technologies associated with the Industry 4.0 concept, OSC can offer a higher rate of productivity and safety. While there is a rich literature focusing on both OSC and Industry 4.0, the implementation of associated digital technologies in the OSC context has not been fully evaluated. This paper intends to evaluate the current literature of digital technology applications in OSC. Scientometric analyses and a systematic review were carried out evaluating fifteen typical digital technologies adopted by OSC projects, including building information modelling (BIM), radio frequency identification devices (RFID), global positioning systems (GPS), the Internet of Things (IoT), geographic information systems (GIS), sensors, augmented reality (AR), virtual reality (VR), photogrammetry, laser scanning, artificial intelligence (AI), 3D printing, robotics, big data, and blockchain. This review formulates a clear picture of the current practice of these digital technologies and summarizes the main area of application and limitations of each technology when utilized in OSC. The review also points out their potential and how they can be better adopted to improve OSC practice in the future.

118 citations

Journal ArticleDOI
TL;DR: In this article, the authors conducted an economic analysis on microalgae biodiesel so that useful inputs could be provided for policy making, and the analysis was based on a model with a 100-ha production facility, and a learning curve was employed to predict the production cost from 2019 to 2022.
Abstract: Despite strong governmental support, microalgae biodiesel has failed to report rapid growth in China. Thus, it is imperative to conduct an economic analysis on microalgae biodiesel so that useful inputs could be provided for policy making. The analysis is based on a model with a 100-ha production facility. In addition, a sensitivity analysis is performed in this study to determine critical factors contributing to the economic feasibility of microalgae biodiesel. Furthermore, a learning curve is employed to predict the production cost from 2019 to 2022. The production cost is estimated as USD 2.29/kg, which is significantly higher than that of commercial diesel. The findings highlight that biodiesel projects lack economic feasibility and the main barriers are microalgae productivity, annual operating days and product benefits. According to the learning curve prediction, these issues cannot be alleviated within a short period, particularly considering the limitations associated with the current policies. The study concludes with policy implications e.g. a policy system to facilitate the development of microalgae biodiesel.

91 citations

Journal ArticleDOI
TL;DR: Wang et al. as mentioned in this paper established a hierarchical linear model (HLM) of safety climate, individual safety awareness, and safety behavior to examine the multilevel relationships between them, and found that organizational safety climates affect individual safety behavior and safety awareness.
Abstract: The vast majority of accidents in construction are generated by unsafe behaviors. Some researches also find that the behaviors could be influenced by the awareness and safety climate. The safety behavior and awareness belong to individual levels, while the safety climate belongs to the organization level. Previous studies mainly focus on the relationships between safety climate, safety awareness, and safety behavior without considering their different respective levels and the interaction between levels. This study establishes a hierarchical linear model (HLM) of safety climate, individual safety awareness, and safety behavior to examine the multilevel relationships between them. Data were collected using questionnaire from workers in different teams on the construction site in China. The results indicate that organizational safety climates affect individual safety behavior and safety awareness. In addition, there is a positive correlation between individual safety awareness and safety behavior, and the safety climates have a positive moderating effect on the relationship between them. The final conclusion offers a path for the current practice of safety management in the construction industry.

38 citations

Journal ArticleDOI
05 Dec 2019-Energies
TL;DR: A green performance evaluation system that integrates both qualitative and quantitative attributes and provides an overall evaluation of the environmental effectiveness of a construction site layout is developed and will support construction project managers to create high-performance construction site layouts in more scientific and systematic ways.
Abstract: The location of temporary facilities in a construction project and the entire site layout plan directly affect project objectives such as time, labor cost, and material transportation and handling. The layout of construction sites also affects entrainment factors such as energy consumption, carbon footprints, and overall construction operation productivity. While site layout planning has been intensively investigated from a project objectives perspective, there have been very few studies of energy-efficiency-based planning, or of the sustainability performance of site layouts. This study developed a green performance evaluation system aimed at improving the sustainability of construction site layouts. The identified factors include six sustainable evaluation categories covering energy conservation and environmental protection, people-oriented principles, construction efficiency, intensity of economic growth, intensity of space use, and the overall control of process. An analytic hierarchy process (AHP) was adopted to determine the weight of each attribute and a fuzzy comprehensive evaluation method was established to carry out the evaluation. The 23 attributes adopted in this paper were identified in the literature; however, the major contribution of this paper is the development of a green performance evaluation system. This system integrates both qualitative and quantitative attributes and provides an overall evaluation of the environmental effectiveness of a construction site layout. The proposed evaluation system was validated with a commercial building project. The average utilization ratio of the case study site was calculated as 94%, and lessons learned are discussed in this paper. The case study analysis identified available site spaces around the building and examined how the arrangement of resources and facilities ensures effective connection between construction activities. The findings showed that the facility’s layout plays a crucial role in energy consumption and green performance. The proposed system will support construction project managers to create high-performance construction site layouts in more scientific and systematic ways.

31 citations

Journal ArticleDOI
TL;DR: In this paper, an approach for checking prefabricated wall panels using laser scanning is presented. And the results show that the panels which need rectification are correctly identified by the proposed approach.
Abstract: Prefabricated construction has gained increasing popularity to meet the needs of rapid city development in recent years. Installation quality check is a critical task in prefabricated construction, and currently mostly still carried out manually, which is slow and ineffective. To provide an efficient and practical quality check method to replace the current manual method, this paper elaborates on an approach for checking prefabricated wall panels using laser scanning. The approach is validated in an actual case study. A common laser scanner BLK 360 is adopted to collect onsite 3D scenes after panel installation. The point clouds collected are co-roistered, classified, and segmented. Geometric parameters such as angles and distances allow for determining whether the installation meets the quality requirement. The outcome is compared with the quality check results using the conventional manual method. The results show that the panels, which need rectification, are correctly identified by the proposed approach. The major contribution of this study is determining the set of segmentation parameters to be adopted in similar quality check-up procedures. A practical and efficient quality check process is also proposed and can be readily implemented for certain prefabricated elements in many construction cases.

11 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors focus on the recent finding in transesterification of non-edible sources for biodiesel production as well as its economic aspects, fuel properties, and by-products applications.

213 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the current regulatory frameworks for WCO collection and recycling practices imposed by major WCO producing countries, followed by the overview of the progress in biodiesel conversion techniques, along with novel methods to improve the feasibility for upscaling.

119 citations

Journal ArticleDOI
TL;DR: This review formulates a clear picture of the current practice of these digital technologies and summarizes the main area of application and limitations of each technology when utilized in OSC.
Abstract: Off-site construction (OSC) is known as an efficient construction method that could save time and cost, reduce waste of resources, and improve the overall productivity of projects. Coupled with digital technologies associated with the Industry 4.0 concept, OSC can offer a higher rate of productivity and safety. While there is a rich literature focusing on both OSC and Industry 4.0, the implementation of associated digital technologies in the OSC context has not been fully evaluated. This paper intends to evaluate the current literature of digital technology applications in OSC. Scientometric analyses and a systematic review were carried out evaluating fifteen typical digital technologies adopted by OSC projects, including building information modelling (BIM), radio frequency identification devices (RFID), global positioning systems (GPS), the Internet of Things (IoT), geographic information systems (GIS), sensors, augmented reality (AR), virtual reality (VR), photogrammetry, laser scanning, artificial intelligence (AI), 3D printing, robotics, big data, and blockchain. This review formulates a clear picture of the current practice of these digital technologies and summarizes the main area of application and limitations of each technology when utilized in OSC. The review also points out their potential and how they can be better adopted to improve OSC practice in the future.

118 citations

Journal ArticleDOI
TL;DR: The most critical aspects of PPB-based production and valorisation processes are addressed, including the identification of the main challenges and potentials of different growth strategies and a critical analysis of the production of value-added compounds.

93 citations

Journal ArticleDOI
TL;DR: In this article, a review focused on the study of scenario the of using different microalgae species, integrating their cultivation into biorefineries using wastewater and carbon dioxide combating water and air pollution, aiming lipid productivity and fatty acid profile with specific composition.
Abstract: Microalgae are potential sources of high-value lipids, with essential fatty acids that provide health benefits, as the omega-3 polyunsaturated fatty acids. However, its cultivation and downstream processing is still not commercially viable for some applications due to high-water consumption and high costs mainly regarding energy demands and nutrients as nitrogen. Therefore, using waste streams in existing industries as carbon and nutrient sources, as well as evaluating the best methodologies for growth and lipid extraction are essential to viabilize this process. This review focused on the study of scenario the of using different microalgae species, integrating their cultivation into biorefineries using their wastewater and carbon dioxide combating water and air pollution, aiming lipid productivity and fatty acid profile with specific composition. It was found that culture medium conditions and cultivation systems are key elements in understanding the lipid production and can decisively affect the process performance. For example, closed photobioreactors with CO2 supply and light can provide higher photosynthetic efficiency and lipid accumulation, coupled with polyunsaturated fatty acid production. Wastewater use can reduce productivity and affect lipid composition, but CO2 injection can promote both higher biomass and lipid productivities; being Chlorella a potential candidate for implementation in industrial facilities once it showed high PUFA (around 1/3) and lipid content, up to 27%, grown in wastewater. Moreover, it is crucial to seek biomass fractioning to obtain different high-value products that will compensate for high capital and operating costs. Further evaluation of possible effects in the final product quality is required.

91 citations