On the basis of the description of the rare-earth countercurrent extraction process, the on-line detecting method and equipments of rare-earth elements and the application in the process of the rare-earth countercurre...On the basis of the description of the rare-earth countercurrent extraction process, the on-line detecting method and equipments of rare-earth elements and the application in the process of the rare-earth countercurrent extraction are summarized. The procedure simulation of the computer, the automation control method and its current application are also mentioned in the process of rare-earth countercurrent extraction. The method of soft sensor is proposed. Optimal control method based on object-oriented rare-earth countercurrent extraction process and integrated automation system composed of process management system and process control system are presented, which are the developing direction of the automation of rare-earth countercurrent extraction process.展开更多
During the last decade, China rare earth （RE） industry has made significant progress and become one of the most important producers in the world. In this paper, the recent developments in both fundamental research a...During the last decade, China rare earth （RE） industry has made significant progress and become one of the most important producers in the world. In this paper, the recent developments in both fundamental research and industrial application are briefly reviewed： （1） the development and application of Theory of Countercurrent Extraction, （2） the novel solvent extraction process and its application in industry for separating heavy rare earth elements （Tm, Yb, Lu）, yttrium （Y）, and scandium （Sc）, （3） the on-line analysis and automatic control of countercurrent extraction, （4） the eco-friendly process for RE/Th separation of bastnasite in Sichuan Province and electrochemical process for Eu/RE separation, and （5） the optimized flowcharts for typical rare earth minerals in China.展开更多
Large amounts of documents are exchanged during the construction phase of projects, which covers the important management information. To utilize the exchanged documents to support decisionmaking of the management sta...Large amounts of documents are exchanged during the construction phase of projects, which covers the important management information. To utilize the exchanged documents to support decisionmaking of the management staffs, the requirement analysis was carried out based on the interviews to the practitioners. A decision support system called Explyzer+ was developed based on the previous prototype system Explyzer. The latter was enhanced by adding the functions to automate the whole process and the techniques of data mining including decision tree analysis and clustering analysis. A case study for in-depth information analysis was conducted based on the data obtained from a large construction project to demonstrate its feasibility and effectiveness. The system could effectively assist the management staffs to carry out in-depth information analysis for decision-making in construction projects.展开更多
文摘On the basis of the description of the rare-earth countercurrent extraction process, the on-line detecting method and equipments of rare-earth elements and the application in the process of the rare-earth countercurrent extraction are summarized. The procedure simulation of the computer, the automation control method and its current application are also mentioned in the process of rare-earth countercurrent extraction. The method of soft sensor is proposed. Optimal control method based on object-oriented rare-earth countercurrent extraction process and integrated automation system composed of process management system and process control system are presented, which are the developing direction of the automation of rare-earth countercurrent extraction process.
基金Supported by the Ministry of Science and Technology of China (Nos.G1998061301 and 2006CB601100), the National Natural ScienceFoundation of China (Nos. 20371003 and 20221101), and FounderFoundation of Peking University
文摘During the last decade, China rare earth （RE） industry has made significant progress and become one of the most important producers in the world. In this paper, the recent developments in both fundamental research and industrial application are briefly reviewed： （1） the development and application of Theory of Countercurrent Extraction, （2） the novel solvent extraction process and its application in industry for separating heavy rare earth elements （Tm, Yb, Lu）, yttrium （Y）, and scandium （Sc）, （3） the on-line analysis and automatic control of countercurrent extraction, （4） the eco-friendly process for RE/Th separation of bastnasite in Sichuan Province and electrochemical process for Eu/RE separation, and （5） the optimized flowcharts for typical rare earth minerals in China.
基金the National Technological Promotion Program for the 10th-Five-Year Plan of China (No. 2004BA209B04)
文摘Large amounts of documents are exchanged during the construction phase of projects, which covers the important management information. To utilize the exchanged documents to support decisionmaking of the management staffs, the requirement analysis was carried out based on the interviews to the practitioners. A decision support system called Explyzer+ was developed based on the previous prototype system Explyzer. The latter was enhanced by adding the functions to automate the whole process and the techniques of data mining including decision tree analysis and clustering analysis. A case study for in-depth information analysis was conducted based on the data obtained from a large construction project to demonstrate its feasibility and effectiveness. The system could effectively assist the management staffs to carry out in-depth information analysis for decision-making in construction projects.
