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Kaifeng, China

Li X.,Kaifeng University
RISTI - Revista Iberica de Sistemas e Tecnologias de Informacao | Year: 2016

With socio-economic development, tourism and leisure and other tertiary industries are developing rapidly and there is exponential growth in travelers in recent years bringing great difficulties to tourism management. In addition, in the travel process, the acquisition of travel information is lagging behind. The travel information service system based on GIS technologies is open to travel information, especially the public map service, which plays a significant role in obtaining electronic network maps. In this paper, a detailed analysis of GIS systems is made, and some development ways are presented. A structural design of GIS travel information system is put forward for the shortest travel path through the establishment of a geographic information. mathematical model. Finally, Dijkstra's algorithm is employed to choose the best path in GIS applications. In addition, the road traffic is seen as a vector diagram and the scans of urban road traffic go through vectorization treatment in MapInfo, a geographic information system software product. Afterwards nodes and border attributes are analyzed and the best travel path is eventually detected in the urban transport electronic map. Source

Beginning with the increasingly serious situation facing human society, it describes the origin and meaning of ecological circular economy; after that, it focuses on the three main principles of the eco-circular economy, they are reduction, reuse and recycle principles. Then, it analyzes the eco-circular economy further from the angle of industrial technology and economic dimensions, summarizes the barriers to the development of eco-circular economy. Finally, the paper elaborates a number of measures in the establishment of eco-circular economy. © (2012) Trans Tech Publications. Source

He T.,Sun Yat Sen University | Hu Z.S.,Kaifeng University | Li J.L.,Sun Yat Sen University | Yang G.W.,Sun Yat Sen University
Journal of Physical Chemistry C | Year: 2011

We have presented a comprehensive investigation for the geometric, energetic, and electronic structures of the rutile TiO2 nanowire (NW) and nanotube (NT) by the first-principles calculations accompanied with the crystal orbital overlap population and the wave function analysis. Taking into account the surface interactions, we found that the geometry and stability of TiO2 NWs and NTs greatly depend on the surface structure with the size decreasing, which demonstrates the forming shape and structure. The competition between the surface-bonding effect and the quantum-confinement effect induces the oscillation behavior and the direct-indirect transition of the band gap of TiO2 NWs and NTs. These findings not only provide a new insight into the fundamental understanding of TiO2 nanostructures but also provide useful information to design TiO2 nanostructures for different applications. © 2011 American Chemical Society. Source

Li J.L.,Sun Yat Sen University | Hu Z.S.,Kaifeng University | Yang G.W.,Sun Yat Sen University
Chemical Physics | Year: 2012

By theoretical analysis, we have explored the feasibility of functionalizing boron fullerene (B 80) by adsorbing Mg atoms for the application as hydrogen storage nanomaterials. Our results show that due to the charge transfer from Mg to B atoms Mg atoms reside above the pentagonal faces of the B 80 cage. The electric field induced around the positive charged Mg atoms polarizes H 2 molecules, and the resulting binding is strong enough to adsorb H 2 without dissociation. Further calculations indicated that the 12Mg-decorated-B 80 has a high hydrogen storage capacity storing up to 96 H 2 molecules with an ideal binding energy of 0.20 eV/H 2 according to the approximation of GGA and 0.5 eV/H 2 according to LDA, corresponding to a hydrogen uptake of 14.2%. This suggested a possible method of engineering new structure for high-capacity hydrogen storage materials with the reversible adsorption and desorption of hydrogen molecules. © 2011 Elsevier B.V. All rights reserved. Source

Wang Q.,Jilin University | Liu Y.,Kaifeng University
Metallurgical and Mining Industry | Year: 2015

In light of low accuracy of standard PCA algorithm in seismic prospecting signal identification, this paper proposed an improved model that optimizes the PCA algorithm by weighted iteration of kernel function. Firstly, it takes radial basis function as the kernel function to build the test model, realizes the transformation from input space to characteristic space through non-linear mapping, conducts the linear PCA weighted iteration on the mapping data so as to improve the non-linear processing ability of PCA algorithm, and finally constructs the model based on the optimized PCA algorithm by kernel function. Simulation experiments show that the improved PCA algorithm has better performance than standard PCA algorithm and wavelet transform algorithm in seismic prospecting signal identification. © Metallurgical and Mining Industry, 2015. Source

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