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A questionnaire text mining model is built based on latent semantic analysis (LSA). Take open questionnaire as the research object and improve Latent Dirichlet Allocation (LDA) model according to the text characteristics, a BM25-LDA model is built. By comparing the LDA model and BM25-LDA model on the open questionnaire text, we can verify that the performance of BM25-LDA mode is better than that of...
Accurate land cover mapping by using coarse resolution imageries has been an attractive research topic. Sub-pixel mapping has been proven efficient for allocating sub-pixels within a mixed pixel. The most likely distribution can be determined on the condition of maximized spatial dependence. However, linear land cover like roads and rivers cannot be predicted efficiently because of weaker spatial...
As a renewable energy, wind power generation has become an important development direction for power industries due to its non-pollutant and inexhaustible resource. Reliability improvement, operational cost reduction and power loss decreasing are some of the main benefits of distribution generator (DG) allocation in distribution systems. In this paper, an optimal planning model is presented for the...
This paper proposed an approach to describe and manage the e-learning resources. The learning resources is firstly described in XML format using the share content object reference model standard, then the binding XML file and learning resource content is produced. Secondly, the described learning resources are put into the database and management according to the content package specification and...
Resource management in distributed and heterogeneous databases is an urgent problem nowadays. In this paper, a framework is proposed to give an efficient method to solve this problem. This framework has two main parts. First, the Web service architecture is given by analyzing many metadata standards and databases. By using Web service technology, the ontology-based framework of is proposed to address...
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