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  • Open Access

    Improved GNSS Cooperation Positioning Algorithm for Indoor Localization

    Taoyun Zhou1, 2, Baowang Lian1, Siqing Yang2, *, Yi Zhang1, Yangyang Liu1, 3

    CMC-Computers, Materials & Continua, Vol., , DOI:10.3970/cmc.2018.02671

    Abstract For situations such as indoor and underground parking lots in which satellite signals are obstructed, GNSS cooperative positioning can be used to achieve high-precision positioning with the assistance of cooperative nodes. Here we study the cooperative positioning of two static nodes, node 1 is placed on the roof of the building and the satellite observation is ideal, node 2 is placed on the indoor windowsill where the occlusion situation is more serious, we mainly study how to locate node 2 with the assistance of node 1. Firstly, the two cooperative nodes are located with pseudo-range single point positioning, and the… More >

  • Open Access

    Coverless Information Hiding Based on the Molecular Structure Images of Material

    Yi Cao1, 2, Zhili Zhou1, 2, 3, Xingming Sun1, 2, Chongzhi Gao4, *

    CMC-Computers, Materials & Continua, Vol.,

    Abstract The traditional information hiding methods embed the secret information by modifying the carrier, which will inevitably leave traces of modification on the carrier. In this way, it is hard to resist the detection of steganalysis algorithm. To address this problem, the concept of coverless information hiding was proposed. Coverless information hiding can effectively resist steganalysis algorithm, since it uses unmodified natural stego-carriers to represent and convey confidential information. However, the state-of-the-arts method has a low hidden capacity, which makes it less appealing. Because the pixel values of different regions of the molecular structure images of material (MSIM) are usually different,… More >

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