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  • Open Access

    ARTICLE

    Extracting Lotus Fields Using the Spectral Characteristics of GF-1 Satellite Data

    Dongping Zha1,2, Haisheng Cai1,*, Xueling Zhang1, Qinggang He1, Liting Chen1, Chunqing Qiu1, Shufang Xia2

    Phyton-International Journal of Experimental Botany, Vol.91, No.10, pp. 2297-2311, 2022, DOI:10.32604/phyton.2022.020117 - 30 May 2022

    Abstract The lotus (Nelumbo nucifera Gaertn.) is an aquatic plant that grows in shallow water and has long been cultivated in South China. It can improve the incomes of farmers and plays an important role in alleviating poverty in rural China. However, a modern method is required to accurately estimate the area of lotus fields. Lotus has spectral characteristics similar to those of rice, grassland, and shrubs. The features surrounding areas where it is grown are complex, small, and fragmented. Few studies have examined the remote sensing extraction of lotus fields, and automatic extraction and mapping are More >

  • Open Access

    ARTICLE

    Radiation Cross Calibration Based on GF-1 Side Swing Angle

    Yong Xie1, Zui Tao2,*, Wen Shao3, John J. Qu4, Hai Huan3, Chuanyang Tian3

    Journal on Internet of Things, Vol.1, No.1, pp. 9-16, 2019, DOI:10.32604/jiot.2019.05859

    Abstract Radiation cross-calibration is an effective method to check and verify the accuracy and stability of sensor measurements. Satellites with high radiation accuracy are used to calibrate satellites with low radiation accuracy. In order to ensure the reliability of the radiation cross-calibration method, we propose to obtain the gain and offset of the GaoFen-1 satellite by linear regression after the radiation cross-calibration of the satellite with low precision and compare with the official coefficient. Finally, we get the relationship between the error in radiation cross-calibration results and side swing angle. The linear correction coefficients of each More >

  • Open Access

    ARTICLE

    Mechanical Loading by Fluid Shear Stress Enhances IGF-1 Receptor Signaling in Osteoblasts in A PKC ζ -Dependent Manner

    Jason W. Triplett, Rita O’Riley, Kristyn Tekulve, Suzanne M. Norvell, Fredrick M. Pavalko

    Molecular & Cellular Biomechanics, Vol.4, No.1, pp. 13-26, 2007, DOI:10.3970/mcb.2007.004.013

    Abstract Maintenance of optimal bone physiology requires the coordinated activity of osteoclasts that resorb old bone and osteoblasts that deposit new bone. Mechanical loading of bone and the resulting movement of interstitial fluid within the spaces surrounding bone cells is thought to play a key role is maintaining optimal bone mass. One way in which fluid movement may promote bone formation is by enhancing osteoblast survival. We have shown previously that application of fluid flow to osteoblasts in vitro confers a protective effect by inhibiting osteoblast apoptosis (Pavalko et al., 2003, J. Cell Physiol., 194: 194-205).… More >

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