Project management teams are critical in the implementation of megaprojects,but their evolution throughout the project lifecycle has not been clearly explained.This paper explores the organizational evolution of megap...Project management teams are critical in the implementation of megaprojects,but their evolution throughout the project lifecycle has not been clearly explained.This paper explores the organizational evolution of megaproject management teams through a longitudinal retrospective case study of the Hong Kong–Zhuhai–Macao Bridge(HZMB)project.The organizational evolution is examined in terms of management objectives,management content,and organizational structure.The organizational evolution of the HZMB project management team exhibits stage differentiation with the coexistence of turbulence and stability.Changes in the external environment are the driving force for organizational evolution,whereas a flexible organizational strategy is critical in promoting this evolution.Basing on the HZMB case study,this paper summarizes six critical measures that facilitate the organizational evolution of megaproject management teams.Our findings add value to megaproject management theory and provide a better understanding of the dynamics and complexity of megaproject organizational management.展开更多
Many researchers found high potential of adopting building photovoltaic(PV)systems in urban areas,especially on building rooftop,to improve the sustainability of urban environment.However,the optimal energy output per...Many researchers found high potential of adopting building photovoltaic(PV)systems in urban areas,especially on building rooftop,to improve the sustainability of urban environment.However,the optimal energy output performance and economic benefit of the PV system are affected by the usable roof area,PV array layout,and shading effect considering high city density.This study aims to understand the effects of these design parameters in the urban environment of rooftop PV's economic performance.This study carries out a case study in the urban area of Melbourne with 90 PV designs under three shading conditions to generate 270 scenarios.Through a lifecycle cost-benefit analysis,including net present value(NPV),NPV per kW,internal return rate(IRR),and payback year,the results can help in developing a comprehensive understanding of the economic performance of rooftop PV designs that cover most of the urban areas of Melbourne.The optimal PV design scenarios for the urban environment are identified,thereby providing investors and industry professionals with useful information on value-for-money PV design.Meanwhile,the maximum shading loss that makes the PV systems financially unfeasible is investigated,and design scenarios with greatest ability to sustain the shading effect are identified.This research can also support the policy makers'decision on the development and deployment of the roof PV systems in urban planning.展开更多
Since 2000, China’s urban land has expanded at a dramatic speed because of the country’s rapid urbanization. The country has been experiencing unbalanced development between rural and urban areas, causing serious ch...Since 2000, China’s urban land has expanded at a dramatic speed because of the country’s rapid urbanization. The country has been experiencing unbalanced development between rural and urban areas, causing serious challenges such as agricultural security and land resources waste. Effectively evaluating the driving factors of urban land growth is essential for improving efficient land use management and sustainable urban development. This study established a principal component regression model based on eight indicators to identify their influences on urban land growth in Guangzhou. The results provided a grouping analysis of the driving factors, and found that economic growth, urban population, and transportation development are the driving forces of urban land growth of Guangzhou, while the tertiary industry has an opposite effect. The findings led to further suggestions and recommendations for urban sustainable development. Hence, local governments should design relevant policies for achieving the rational development of urban land use and strategic planning on urban sustainable development.展开更多
Engineering management research objects have gradually been transformed from micro-scale projects to macro-scale built environment.Built environment has driven the advancement of civilization through human history.Fro...Engineering management research objects have gradually been transformed from micro-scale projects to macro-scale built environment.Built environment has driven the advancement of civilization through human history.From the Stone Age to the modem era,built environment,which refers to manmade surroundings,has provided the setting for human activities.Built environment has undergone developments and evolution processes as civilization grew.Today,technological advancements cause influences of built environment to encompass every aspect of life,as material,spatial and cultural products of the human labor force,which combines material factors and energy in a lively way of work and in forms.However,the concept of built environment remains unclear.Built environment faces a major challenge,such as the use of science and technology to solve key national and global issues.Thus,the definitions of built environment were systematically reviewed and summarized from different perspectives and levels to address these issues.The grand challenges of built environment,including climate change and energy consumption,urbanization and infrastructure construction,growth,and innovation,were summarized.Furthermore,the corresponding management issues and future development strategies were proposed to solve identified challenges of built environment.展开更多
Infrastructure mega-projects(IMP), which involve complex interactions and feedback, have more significant impact on economic, social, and other systems.This paper proposes a concept—the IMP complex ecosystem—to anal...Infrastructure mega-projects(IMP), which involve complex interactions and feedback, have more significant impact on economic, social, and other systems.This paper proposes a concept—the IMP complex ecosystem—to analyze IMP from a broad perspective of organic links across engineering, social, economic, and resource environments. Moreover, this paper proposes the theoretical concept, framework, and functions for the IMP complex ecosystem based on complex ecosystem theory.First, the coupling process between IMP complex ecosystem subsystems is analyzed through material flows, energy flows, information flows, and value streams.Second, a logistic model of the IMP complex ecosystem is proposed by analyzing the evolution conditions and motivations. Third, the evolution pattern of the IMP complex ecosystem is determined. Fourth, the positive evolution strategy of the IMP complex ecosystem based on dissipative structure theory and the influencing factors of the evolutionary process is introduced. Finally, the Hong Kong-Zhuhai-Macao Bridge and Sousa chinensis are used as the case study. This paper also analyzes the coupling structure on the complex ecosystem of the Hong KongZhuhai-Macao Bridge and investigates the coupling and evolution mechanism application of the IMP complex ecosystem on Sousa chinensis protection for the Hong Kong-Zhuhai-Macao Bridge project.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant No.72001051)Guangdong Philosophical and Social Science Program(Grant No.GD19YGL09)National Philosophical and Social Science Foundation of China(Grant No.18ZDA043).
文摘Project management teams are critical in the implementation of megaprojects,but their evolution throughout the project lifecycle has not been clearly explained.This paper explores the organizational evolution of megaproject management teams through a longitudinal retrospective case study of the Hong Kong–Zhuhai–Macao Bridge(HZMB)project.The organizational evolution is examined in terms of management objectives,management content,and organizational structure.The organizational evolution of the HZMB project management team exhibits stage differentiation with the coexistence of turbulence and stability.Changes in the external environment are the driving force for organizational evolution,whereas a flexible organizational strategy is critical in promoting this evolution.Basing on the HZMB case study,this paper summarizes six critical measures that facilitate the organizational evolution of megaproject management teams.Our findings add value to megaproject management theory and provide a better understanding of the dynamics and complexity of megaproject organizational management.
文摘Many researchers found high potential of adopting building photovoltaic(PV)systems in urban areas,especially on building rooftop,to improve the sustainability of urban environment.However,the optimal energy output performance and economic benefit of the PV system are affected by the usable roof area,PV array layout,and shading effect considering high city density.This study aims to understand the effects of these design parameters in the urban environment of rooftop PV's economic performance.This study carries out a case study in the urban area of Melbourne with 90 PV designs under three shading conditions to generate 270 scenarios.Through a lifecycle cost-benefit analysis,including net present value(NPV),NPV per kW,internal return rate(IRR),and payback year,the results can help in developing a comprehensive understanding of the economic performance of rooftop PV designs that cover most of the urban areas of Melbourne.The optimal PV design scenarios for the urban environment are identified,thereby providing investors and industry professionals with useful information on value-for-money PV design.Meanwhile,the maximum shading loss that makes the PV systems financially unfeasible is investigated,and design scenarios with greatest ability to sustain the shading effect are identified.This research can also support the policy makers'decision on the development and deployment of the roof PV systems in urban planning.
基金the National Natural Science Foundation of China (Grant Nos. 71603062 and 41401432)the Project of Philosophy and Social Sciences in Guangdong Province (GD14CGL02)+1 种基金the Project of Science and Technology for local universities in Guangzhou City (1201420951)Guangzhou University’s 2017 training program for young top-notch personnel (BJ201723).
文摘Since 2000, China’s urban land has expanded at a dramatic speed because of the country’s rapid urbanization. The country has been experiencing unbalanced development between rural and urban areas, causing serious challenges such as agricultural security and land resources waste. Effectively evaluating the driving factors of urban land growth is essential for improving efficient land use management and sustainable urban development. This study established a principal component regression model based on eight indicators to identify their influences on urban land growth in Guangzhou. The results provided a grouping analysis of the driving factors, and found that economic growth, urban population, and transportation development are the driving forces of urban land growth of Guangzhou, while the tertiary industry has an opposite effect. The findings led to further suggestions and recommendations for urban sustainable development. Hence, local governments should design relevant policies for achieving the rational development of urban land use and strategic planning on urban sustainable development.
基金the National Social Science Fund of China(Grant No.18ZDA043)The work described in this paper was also funded by the National Natural Science Foundation of China(Grant Nos.71841024,71671053,71771067,and 71390522)the National Key R&D Program of China(Grant Nos.2016YFC0701800 and 2016YFC0701808).
文摘Engineering management research objects have gradually been transformed from micro-scale projects to macro-scale built environment.Built environment has driven the advancement of civilization through human history.From the Stone Age to the modem era,built environment,which refers to manmade surroundings,has provided the setting for human activities.Built environment has undergone developments and evolution processes as civilization grew.Today,technological advancements cause influences of built environment to encompass every aspect of life,as material,spatial and cultural products of the human labor force,which combines material factors and energy in a lively way of work and in forms.However,the concept of built environment remains unclear.Built environment faces a major challenge,such as the use of science and technology to solve key national and global issues.Thus,the definitions of built environment were systematically reviewed and summarized from different perspectives and levels to address these issues.The grand challenges of built environment,including climate change and energy consumption,urbanization and infrastructure construction,growth,and innovation,were summarized.Furthermore,the corresponding management issues and future development strategies were proposed to solve identified challenges of built environment.
基金funded by the National Natural Science Foundation of China(Grant Nos.71771067 and 71390522)
文摘Infrastructure mega-projects(IMP), which involve complex interactions and feedback, have more significant impact on economic, social, and other systems.This paper proposes a concept—the IMP complex ecosystem—to analyze IMP from a broad perspective of organic links across engineering, social, economic, and resource environments. Moreover, this paper proposes the theoretical concept, framework, and functions for the IMP complex ecosystem based on complex ecosystem theory.First, the coupling process between IMP complex ecosystem subsystems is analyzed through material flows, energy flows, information flows, and value streams.Second, a logistic model of the IMP complex ecosystem is proposed by analyzing the evolution conditions and motivations. Third, the evolution pattern of the IMP complex ecosystem is determined. Fourth, the positive evolution strategy of the IMP complex ecosystem based on dissipative structure theory and the influencing factors of the evolutionary process is introduced. Finally, the Hong Kong-Zhuhai-Macao Bridge and Sousa chinensis are used as the case study. This paper also analyzes the coupling structure on the complex ecosystem of the Hong KongZhuhai-Macao Bridge and investigates the coupling and evolution mechanism application of the IMP complex ecosystem on Sousa chinensis protection for the Hong Kong-Zhuhai-Macao Bridge project.