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Two hybrid methods, rank integration and hierarchical methods, are proposed for 3D model retrieval by using features based on geometric ratios and statistical information. Both methods are capable of taking advantage of each single retrieval method very well. A contrast experiment for the hybrid methods, single retrieval methods, and weighted method is conducted. Experimental results show that, the...
Through a thorough collation and analysis of the historical data about exploration and development of Daqing oilfield, a system dynamics model of oil production in the field is established in this paper. Parameters in the model are analyzed and determined, and simulations are made to forecast the oil production, degree of reserve recovery, remaining recoverable reserves, the direct exploration investment...
Case based design is an effective method to reuse existing resources in an enterprise. The similarity between 3D models of parts is measured by shape distribution method. Fuzzy c-means clustering algorithm is applied to classify products 3D models. The classes of 3D model form high dimension Euler space and the vector space model is used to represent the product case. The process to construct product...
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