According to the multi-project and program management theory, this paper analyzes the program generation principle and establishes a program based on progress goals. On the basis of the present situation of calculatio...According to the multi-project and program management theory, this paper analyzes the program generation principle and establishes a program based on progress goals. On the basis of the present situation of calculation of penalty for delay of the bidding section construction period with the critical path method, we studied the effects of contractor-induced delay of the bidding section construction period in detail, including the effects on the construction period of the bidding section itself, the earliest start times of the next bidding section and other subsequent bidding sections, and the construction period of the program, and then constructed a penalty model for delay of the bidding section construction period from the perspective of programs. Using the penalty model, we conducted a practical analysis of penalty for delay of the construction period of the Baoying station program in the South-to-North Water Diversion Project. The model can help determine the amount of penalty for delay of the construction period in bidding sections scientifically and reasonably,展开更多
Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when ...Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when data are incomplete.The existing grey relational models have some disadvantages in measuring the correlation between categorical data sequences.To this end,this paper introduces a new grey relational model to analyze heterogeneous data.In this study,a set of security risk factors for small reservoirs was first constructed based on theoretical analysis,and heterogeneous data of these factors were recorded as sequences.The sequences were regarded as random variables,and the information entropy and conditional entropy between sequences were measured to analyze the relational degree between risk factors.Then,a new grey relational analysis model for heterogeneous data was constructed,and a comprehensive security risk factor identification method was developed.A case study of small reservoirs in Guangxi Zhuang Autonomous Region in China shows that the model constructed in this study is applicable to security risk factor identification for small reservoirs with heterogeneous and sparse data.展开更多
Building information modeling(BIM),as a transformative technology,plays a crucial role in implementing lean construction within the architecture,construction,and engineering(AEC)industry.Despite extensive studies that...Building information modeling(BIM),as a transformative technology,plays a crucial role in implementing lean construction within the architecture,construction,and engineering(AEC)industry.Despite extensive studies that have focused on how to promote BIM adoption more effectively,the literature remains divided on the relationship between BIM adoption and its determinants.To clarify the controversy,this meta-analysis was conducted on 62 empirical studies published between 2012 and 2023,involving 11,228 study subjects across 13 countries,based on the technology-organization-environment(TOE)framework.The findings showed that,among the technical characteristics,compatibility proved to be the major driver.Additionally,in the organizational dimension,organizational culture was considered a very crucial factor,while among the external environment,mimetic pressure stood out as a primary driver in promoting BIM adoption.This research synthesizes previous theories to develop an integrated framework of BIM adoption,verifying that perceived usefulness and perceived ease of use mediated the influences of external factors on BIM adoption.It also showed that the national BIM maturity(eight complementary components),along with contextual factors(organization type,job level,and time span),moderates the effects of the particular pathways in the framework.The proposed integrated theoretical model measures the association of BIM adoption with its determinants,offering new insights into the mechanisms of BIM adoption.These findings help to resolve some lingering debates in the extant literature and promote wider adoption of BIM in the AEC industry.展开更多
The quality traceability of precast components has largely affected the widespread adoption of prefabricated buildings.Blockchain technology provides an effective solution to change the centralized storage mode of tra...The quality traceability of precast components has largely affected the widespread adoption of prefabricated buildings.Blockchain technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related disadvantages.In this paper,we propose a framework of quality traceability system for precast components based on blockchain technology.The system framework adopts a hybrid blockchain architecture and dual storage mode,defines three types of smart contracts,and creates an interactive and efficient source tracing query method,which could effectively achieve the goals of decentralization,openness,and non-tamperability,as well as efficient traceability.展开更多
基金supported by the National Science and Technology Plan of China (Major Project of the Eleventh Five-Year Plan, Grant No. 2006BAB04A13)the Philosophy and Social Science Fund of Education Department of Jiangsu Province (Grant No. 07SJD630006)+1 种基金the Third Key Discipline (Techno-Economics and Management) of the Project 211the Key Disciplines of Jiangsu Province (Engineering and Project Management)
文摘According to the multi-project and program management theory, this paper analyzes the program generation principle and establishes a program based on progress goals. On the basis of the present situation of calculation of penalty for delay of the bidding section construction period with the critical path method, we studied the effects of contractor-induced delay of the bidding section construction period in detail, including the effects on the construction period of the bidding section itself, the earliest start times of the next bidding section and other subsequent bidding sections, and the construction period of the program, and then constructed a penalty model for delay of the bidding section construction period from the perspective of programs. Using the penalty model, we conducted a practical analysis of penalty for delay of the construction period of the Baoying station program in the South-to-North Water Diversion Project. The model can help determine the amount of penalty for delay of the construction period in bidding sections scientifically and reasonably,
基金supported by the National Nature Science Foundation of China(Grant No.71401052)the National Social Science Foundation of China(Grant No.17BGL156)the Key Project of the National Social Science Foundation of China(Grant No.14AZD024)
文摘Identification of security risk factors for small reservoirs is the basis for implementation of early warning systems.The manner of identification of the factors for small reservoirs is of practical significance when data are incomplete.The existing grey relational models have some disadvantages in measuring the correlation between categorical data sequences.To this end,this paper introduces a new grey relational model to analyze heterogeneous data.In this study,a set of security risk factors for small reservoirs was first constructed based on theoretical analysis,and heterogeneous data of these factors were recorded as sequences.The sequences were regarded as random variables,and the information entropy and conditional entropy between sequences were measured to analyze the relational degree between risk factors.Then,a new grey relational analysis model for heterogeneous data was constructed,and a comprehensive security risk factor identification method was developed.A case study of small reservoirs in Guangxi Zhuang Autonomous Region in China shows that the model constructed in this study is applicable to security risk factor identification for small reservoirs with heterogeneous and sparse data.
基金supported by the National Social Science Fund Later Funding Project of China(Grant No.22FGLB107).
文摘Building information modeling(BIM),as a transformative technology,plays a crucial role in implementing lean construction within the architecture,construction,and engineering(AEC)industry.Despite extensive studies that have focused on how to promote BIM adoption more effectively,the literature remains divided on the relationship between BIM adoption and its determinants.To clarify the controversy,this meta-analysis was conducted on 62 empirical studies published between 2012 and 2023,involving 11,228 study subjects across 13 countries,based on the technology-organization-environment(TOE)framework.The findings showed that,among the technical characteristics,compatibility proved to be the major driver.Additionally,in the organizational dimension,organizational culture was considered a very crucial factor,while among the external environment,mimetic pressure stood out as a primary driver in promoting BIM adoption.This research synthesizes previous theories to develop an integrated framework of BIM adoption,verifying that perceived usefulness and perceived ease of use mediated the influences of external factors on BIM adoption.It also showed that the national BIM maturity(eight complementary components),along with contextual factors(organization type,job level,and time span),moderates the effects of the particular pathways in the framework.The proposed integrated theoretical model measures the association of BIM adoption with its determinants,offering new insights into the mechanisms of BIM adoption.These findings help to resolve some lingering debates in the extant literature and promote wider adoption of BIM in the AEC industry.
基金the National Natural Science Foundation of China(Grant No.71771125)Major Project of Natural Science Foundation of Jiangsu Education Department(Grant No.19KJA180002)+1 种基金National Key Research and Development Project(Grant No.2019YFB1404602)the Fundamental Research Funds for the Central Universities(Grant No.2020QN73).
文摘The quality traceability of precast components has largely affected the widespread adoption of prefabricated buildings.Blockchain technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related disadvantages.In this paper,we propose a framework of quality traceability system for precast components based on blockchain technology.The system framework adopts a hybrid blockchain architecture and dual storage mode,defines three types of smart contracts,and creates an interactive and efficient source tracing query method,which could effectively achieve the goals of decentralization,openness,and non-tamperability,as well as efficient traceability.
