1、英文原文Data Integration Research of Coal Mine Safety ProductionSystem for Emergency Decision-makingPan Qi-dong；Zhang Rui-xin；Duan Dong-sheng；School of Resources and Safety Engineering, China University of Mining and Technology(Beijing), Beijing 100083;School of Energy Science and Engineering, Henan Pol
2、ytechnic University, Henan, JiaoZuo, 454003.ABSTRACT: Today the serious casualties of Chinese coal mines happened frequently and caused great casualties and property losses. This situation is extremely associated with scarcity of advanced emergency management(EM) methods for emergences forecast&prec
3、aution and decision-making. Data integration of coal mine safety production (CMSP) system is the foundation of solving above problems. According to the multi-source and heterogeneous features of CMSP System, this paper analyzes several ways of data integrating, and concludes that the combination of
4、data warehouse and middleware (named data-center) can solve the problems effectively. On this basis, a meta-framework model for coal mine EM system is established, and the data integration system for coal mine emergency decision-making is designed. At last the conversion problem of heterogeneous-sou
5、rce data is analyzed.KEYWORDS: coal mine;emergency decision-making;data integration;multi-source heterogeneousI. INTRODUCTIONNowadays, the situation of CMSP is still very serious. The EM functions implement incompletely and lack of advanced EM methods are the significant causes. Relying on informati
6、on technology（IT） to solve CMSP problems, and establishing intelligent coal mine emergency decision support system, are extremely vital significance to CMSP. CMSP system is a huge system. It includes a series platforms of softwares and hardwares such as communication network system, ascension and ad
7、hesive tape transportation machine system, gas drainage system, drainage and pressing air system, power monitoring and controlling system, safety production monitoring system, and so on. It also includes command and organization system, legal rules and regulations, publicity, training, personnel and
8、 supporting materials, etc.Coal mine EM is an important segment to CMSP. It contains four processes, that is prevention and emergency preparedness, monitoring and early warning, emergency handling and rescue, restoration and reconstruction. It is a whole management process in coal mine operation. Da
9、ta integration of CMSP is a prerequisite to EM system for emergences forecast and precaution and decision-making. Due to different construction time, using dissimilar technical standard and different subordinate departments, the data of information systems in CMSP simultaneously have all characteris
10、tics of system heterogeneous, model heterogeneous and sources heterogeneous. Actually, data integration of CMSP is a typical multi-source heterogeneous data integration problem.II. MODE AND OPTION OF DATAINTEGRATIONA. Concept of Data IntegrationData integration is a process of organizing the fixed d
11、ata and heterogeneous data in different database systems, which aims to make different applications access to the shared data, and then establish more application functions. Data integration is a basic integration. It always is start of the application integration and information system integration.
12、 Fig.1 is the abstract model of data integration.Figure1. A abstract model of data integrationB. Comparison and Selection of the Ways of Data IntegrationUsually, multi-source heterogeneous data integration has two modes. One is to transplant the original data into the new database management system,
13、 which includes federated database and data warehouse regularly. Another is the middleware . And the modes of data warehouse and middleware are popular and get more applicationData warehouse utilizes metadata models to identify and catalogue these scattered and independent databases. The data source
14、s integrate into a global model after ETL (Data Extraction, Transformation and Loading) process, and then stored in the data warehouse. The data warehouse will wash those mass useless data during above process， and can be preferable used to carry on data mining and knowledge discovery through histor
15、ical data analysis. On contrast，Middleware mode use a unified data logical view, which provided by a software located between a heterogeneous database system (data layer) and the application procedures (application layer), to hide the details of bottom data. Through this way, users can regard the da
16、ta integration as a unified whole. It can provide general data interface upward to accessing the applications of integrated data. Through comparison，the later has advantage of the former on deal with the real-time data.Emergency decision data root in CMSP system, which need to know the real-time running state, while the historical mass data also should be made in-depth study and utilizing. In order to satisfy the need of EM, this paper builds a data center(d
