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Cu-Mn mixed oxide catalysts have been prepared by citric acid complex method and evaluated in the catalytic combustion of methyl acetate. The catalysts are characterized by X-ray diffraction (XRD) and Temperature¨Cprogrammedreduction (TPR). Doping an appropriate amount of Cu inMn3O4 is favorable for the formation of a stable solid solution. Thus, the(More)
Based on the actual needs of project, this paper introduces a solution of cluster centers and attached matrix into application of Fuzzy C-means clustering algorithm in macro-economic forecast. We present the specific implementation of this algorithm, as well as the major steps of data mining. And in the end, an example is given to prove the(More)
Many nature reserves are established to protect the habitat needs of particular endangered species of interest but their effectiveness for protecting other species is questionable. In this study, this effectiveness was evaluated in a nature reserve network located in the Qinling Mountains, Shaanxi Province, China. The network of reserves was established(More)
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