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In the whole life cycle of equipment, multi-source testability demonstration test data (TDTD) which may be acquired at different stages, in different environment and at different levels (system, subsystem or replaceable unit), can be used for testability integrated evaluation. However, the above multi-source data cannot be used for testability integrated evaluation directly for they share many distinctions...
Role-based access control strategy has been widely applied to a variety of access control system. Permission checks are employed in this strategy to improve flexibility and easier management, using dynamic proxy to optimize the process. Facilitating an authority through permission checks helps provide grained transaction management safely. In this study we proposed an authority control method based...
Engine testing technology has made great development and gathering the engine data of failure becomes more and more easily. The engine fault recognition method based on data driving has made rapid development. The support vector machine (SVM) is currently a well-known machine learning technique. It has been applied to deal with range of fault recognition problems due to its unique advantages. There...
Building a refined 3D geological model of coal mines and major hazard pre-warning based on the geological models are new challenges and new topics of the coal mine safety. This paper established a 3D geological model of the Wangjialing coal mine. This paper introduced the work flow of 3D Geological Modeling in the Wangjialing Coal Mine. 175 drill holes, 22 faults, 11 stratigraphic layers, 11 subsidence...
A novel approach of 3D coalmine roadway dynamic modeling and interactive query taking roadway geological feature into account was discussed in this paper. Adding the geological layers, coal seams and coal quality data into the roadway model, the traditional 3D roadway geometric model turns to be a 3D model displaying the inner geological structure and the rich attribute information. The paper presented...
This paper puts forward a model of path fault recovery of MPLS VPN, which is DR-PFR (Double Recovery-Path Fault Recovery), for the failure on the path of MPLS VPN. DR-PFR can solve the failures in both the working path and the backup path. Experiments show that under the condition of using the resources effectively, when the network fails, DR-PFR can enable the network recover timely and effectively...
3D modeling of unstratified orebody is important and difficult in the computer application in mining projects. To vividly analyze and observe spatial characters of orebody three dimensionally, establishing practical 3D visualization system of unstratified orebody is significant. The thesis introduces general design philosophy of “Geodetic Space Management Information System of Unstratified Orebody”,...
This paper taking Mudanjiang in Heilongjiang Province as the study region, the remote sensing data and topographic map data in forth years as a basis for data, the vulnerability model was evaluated based on the sensitivity, exposure and adaption ability, relevant parameters of model was acquired by GIS and RS technology and mathematic model, and the vulnerability of ecological environment was in a...
Accurate detection of suspended-matter concentrations in water columns is an important task in remotely sensing water color. This letter aims to identify an optimal model for estimating suspended-matter concentration in the optically complex Lake Taihu of China. Remote sensing reflectance Rrs(λ), inherent optical properties, and constituent concentrations of the Lake water were synchronously measured...
Credit Risk Identification in small and medium enterprises(SMEs) is a real problem which is necessary to be solved in financial sector. Focusing on 32 small and medium enterprises which had bank loan, dimension of six indicators used to judge whether enterprises had credit risk was reduced to simplify model by adopting the factor analysis method. Then small sample data was trained and simulated in...
Requirement analysis is a critical but difficult part of software development. With the combination of various requirement analysis methods and practice, a method which carries out requirement analysis through nine steps is proposed. The establishment of three models, business model, preliminary data model and functional model, is the focus of the establishment of a target system. Such method has...
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