Building information modeling(BIM)has become prevalent in construction engineering management.However,the efficiency of traditional file-based BIM exchange between multidisciplinary teams remains low due to the transm...Building information modeling(BIM)has become prevalent in construction engineering management.However,the efficiency of traditional file-based BIM exchange between multidisciplinary teams remains low due to the transmission of redundant data from mostly unchanged BIM objects.Additionally,the traceability of changes between BIM files is limited.This paper proposes a traceable semantic differential transaction(tSDT)approach for open BIM exchange,which minimizes data redundancy and enables semantic-level traceability of BIM changes.Furthermore,openBIMdisk implements the tSDT and provides a Blockchain 3.0 virtual disk to support efficient,traceable,and secure BIM exchanges across multiple blockchain services.A pilot study of a modular construction project demonstrated the effectiveness of tSDT and openBIMdisk.Experimental results indicated that tSDT achieved minimal BIM redundancy for storing and restoring all BIM changes,using a sheer 0.007%of disk space on average.openBIMdisk facilitated BIM version management and object-level semantic traceability with a response time of 5.3 ms.The contributions of this paper are twofold.First,tSDT offers a novel and efficient approach for semantic BIM change traceability.Second,openBIMdisk provides BIM practitioners with a Blockchain 3.0 application featuring intuitive and user-friendly interfaces for BIM exchange.展开更多
With the rapid development of web3.0 applications,the volume of data sharing is increasing,the inefficiency of big data file sharing and the problem of data privacy leakage are becoming more and more prominent,and the...With the rapid development of web3.0 applications,the volume of data sharing is increasing,the inefficiency of big data file sharing and the problem of data privacy leakage are becoming more and more prominent,and the existing data sharing schemes have been difficult to meet the growing demand for data sharing,this paper aims at exploring a secure,efficient and privacy-protecting data sharing scheme under web3.0 applications.Specifically,this paper adopts interplanetary file system(IPFS)technology to realize the storage of large data files to solve the problem of blockchain storage capacity limitation,and utilizes ciphertext policy attribute-based encryption(CP-ABE)and proxy re-encryption(PRE)technology to realize secure multi-party sharing and finegrained access control of data.This paper provides the detailed algorithm design and implementation of data sharing phases and processes,and analyzes the algorithms from the perspectives of security,privacy protection,and performance.展开更多
基金supported by HongKong Research Grants Council(RGC)(Grant No.17200221)in part by Hong Kong Innovationand Technology Commission(ITC)(No.ITP/029/20LP).
文摘Building information modeling(BIM)has become prevalent in construction engineering management.However,the efficiency of traditional file-based BIM exchange between multidisciplinary teams remains low due to the transmission of redundant data from mostly unchanged BIM objects.Additionally,the traceability of changes between BIM files is limited.This paper proposes a traceable semantic differential transaction(tSDT)approach for open BIM exchange,which minimizes data redundancy and enables semantic-level traceability of BIM changes.Furthermore,openBIMdisk implements the tSDT and provides a Blockchain 3.0 virtual disk to support efficient,traceable,and secure BIM exchanges across multiple blockchain services.A pilot study of a modular construction project demonstrated the effectiveness of tSDT and openBIMdisk.Experimental results indicated that tSDT achieved minimal BIM redundancy for storing and restoring all BIM changes,using a sheer 0.007%of disk space on average.openBIMdisk facilitated BIM version management and object-level semantic traceability with a response time of 5.3 ms.The contributions of this paper are twofold.First,tSDT offers a novel and efficient approach for semantic BIM change traceability.Second,openBIMdisk provides BIM practitioners with a Blockchain 3.0 application featuring intuitive and user-friendly interfaces for BIM exchange.
基金supported by the National Natural Science Foundation of China(Grant No.U24B20146)the National Key Research and Development Plan in China(Grant No.2020YFB1005500)Beijing Natural Science Foundation Project(No.M21034).
文摘With the rapid development of web3.0 applications,the volume of data sharing is increasing,the inefficiency of big data file sharing and the problem of data privacy leakage are becoming more and more prominent,and the existing data sharing schemes have been difficult to meet the growing demand for data sharing,this paper aims at exploring a secure,efficient and privacy-protecting data sharing scheme under web3.0 applications.Specifically,this paper adopts interplanetary file system(IPFS)technology to realize the storage of large data files to solve the problem of blockchain storage capacity limitation,and utilizes ciphertext policy attribute-based encryption(CP-ABE)and proxy re-encryption(PRE)technology to realize secure multi-party sharing and finegrained access control of data.This paper provides the detailed algorithm design and implementation of data sharing phases and processes,and analyzes the algorithms from the perspectives of security,privacy protection,and performance.
