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We present the performance evaluation of different whole-image descriptors in visual loop closure detection. A whole-image descriptor here is defined as the one that does not require keypoint detection and is therefore fast to extract. In addition, it can be extremely compact to reduce storage requirement. This type of image descriptors are attracting an increasing amount of interest in appearance-based...
With the research results of ecological water requirements, ecological system composition and structure was invested in west of Liaoning Province. It was believed that ecological water requirement of the region should be considered at water resources balance analysis in land development and consolidation projects. The suitable calculation method of ecological water requirement was chosen in the paper,...
The eco-environmental influence of the agriculture is one of the research hotspots of environmental protection science. The agriculture of the protected area for water supply has obvious contradiction with water resource protection, and its negative influence of eco-environment should not be neglected. The article took Yunlong reservoir of Kunming city as a example, and studied the eco-environmental...
The population in the protected area for water supply has obvious influence to water resource protection, and environmental problems related to population factor should not be neglected. The article studied the environmental problems in the protected area for water supply of Yunlong Reservoir of Kunming City by means of field work, statistics analysis, forecast analysis, quantitative and qualitative...
This paper makes an assessment from environment, resources, social, economic, science and education of 31 provinces in China with set pair analysis. Through the assessment results, the provinces and cities of Bohai Sea, Yangtze River Delta and the Pearl River Delta showed a strong level of sustainable development on economy, science and education, comprehensive assessment; and the region which has...
Currently, urbanization has entered a stage of rapid growth in China, the environmental pollution and ecological destroy of cities are becoming more and more serious day by day. The work field of city planning and design is beginning to expand to undertake a task to improve living and ecological environment due to paying more attention to afforesting and ecological construction. Under the new background...
There are some shortages in usual methods for land evaluation that too many manual interferences into the calculating procession. A hypergraph clustering model is designed with the knowledge discovery method in this paper based on fuzzy frequent itemsets to conduct the evaluation for quality of farmland. It executes the mining association rules to the fuzzy itemsets given by the definition of evaluation...
With fast development of industrialization and urbanization, urban rail transit begins to play a more important role in public transportation, occupies a comparatively high proportion of urban transportation, lessens urban traffic congestion and promotes harmonious development of economy and society. The paper analyzes the basic development rules for urban rail transit, then summarizes the status...
The pollution discharge amount of 15 rivers flowing into Taihu Lake in Suzhou, Wuxi and Changzhou of Jiangsu Province, China are examined based on 2007 general survey of pollution sources, statistical yearbook and the data from some related departments. Pollutant emission is large, dominantly from domestic source and secondarily from industrial and agricultural pollution. Comparison of discharge amount...
The fast development of the city economy need requires the efficient and logistical supportive service provided by the modern logistic system for the entire course. The spiral propulsion relation between the modern logistics and the city economy represents the characteristics of the cooperating development. In this essay the inner coupling mechanism and stages of the city logistics and economic development...
Introducing the rank-weight method into the basic ant colony optimization (ACO), we use the modified ACO to optimize the weights and thresholds value of neural networks (NN). And when the BPNN is being trained, this method can solve the disadvantages of running into the minimum easily, and enhance the convergence speed. So we get a heuristic method, which is good at time efficiency and derivation...
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