A file transfer algorithm based on ADP （autonomous decentrafized protocol） was proposed to solve the problem that the ADS （autonomous decentralized system） middleware （NeXUS/Drink） lacks of file transfer functio...A file transfer algorithm based on ADP （autonomous decentrafized protocol） was proposed to solve the problem that the ADS （autonomous decentralized system） middleware （NeXUS/Drink） lacks of file transfer functions for Windows. The algorithm realizes the peer-to-peer file transfer, one-to-N inquiry/multi-response file transfer and one-to-N file distribution in the same data field based on communication patterns provided by the ADP. The peer-to-peer file transfer is implemented through a peer-to-peer communication path, one-to-N inquiry/multi-response file transfer and one-to-N file distribution are implemented through multicast communication. In this algorithm, a file to be transferred is named with a GUID （global unique identification）, every data packet is marked with a sequence number, and file-receiving in parallel is implemented by caching DPOs（data processing objects） and multi-thread technologies. The algorithm is applied in a simulation system of the decentralized control platform, and the test results and long time stable tanning prove the feasibility of the algorithm.展开更多
Integrating heterogeneous data sources is a precondition to share data for enterprises. Highly-efficient data updating can both save system expenses, and offer real-time data. It is one of the hot issues to modify dat...Integrating heterogeneous data sources is a precondition to share data for enterprises. Highly-efficient data updating can both save system expenses, and offer real-time data. It is one of the hot issues to modify data rapidly in the pre-processing area of the data warehouse. An extract transform loading design is proposed based on a new data algorithm called Diff-Match,which is developed by utilizing mode matching and data-filtering technology. It can accelerate data renewal, filter the heterogeneous data, and seek out different sets of data. Its efficiency has been proved by its successful application in an enterprise of electric apparatus groups.展开更多
基金The National Innovation Fund(No.00C262251211336)the Project of State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University(No.SKL2007K001)
文摘A file transfer algorithm based on ADP （autonomous decentrafized protocol） was proposed to solve the problem that the ADS （autonomous decentralized system） middleware （NeXUS/Drink） lacks of file transfer functions for Windows. The algorithm realizes the peer-to-peer file transfer, one-to-N inquiry/multi-response file transfer and one-to-N file distribution in the same data field based on communication patterns provided by the ADP. The peer-to-peer file transfer is implemented through a peer-to-peer communication path, one-to-N inquiry/multi-response file transfer and one-to-N file distribution are implemented through multicast communication. In this algorithm, a file to be transferred is named with a GUID （global unique identification）, every data packet is marked with a sequence number, and file-receiving in parallel is implemented by caching DPOs（data processing objects） and multi-thread technologies. The algorithm is applied in a simulation system of the decentralized control platform, and the test results and long time stable tanning prove the feasibility of the algorithm.
基金Supported by National Natural Science Foundation of China (No. 50475117)Tianjin Natural Science Foundation (No.06YFJMJC03700).
文摘Integrating heterogeneous data sources is a precondition to share data for enterprises. Highly-efficient data updating can both save system expenses, and offer real-time data. It is one of the hot issues to modify data rapidly in the pre-processing area of the data warehouse. An extract transform loading design is proposed based on a new data algorithm called Diff-Match,which is developed by utilizing mode matching and data-filtering technology. It can accelerate data renewal, filter the heterogeneous data, and seek out different sets of data. Its efficiency has been proved by its successful application in an enterprise of electric apparatus groups.
