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    Article

    The employment of quasi-hexagonal grids in spherical harmonic analysis and synthesis for the earth's gravity field

    There exist several limitations in the calculation of the earth's gravity field based on the measurement data at the centroids of geographic grid cells. To address these issues, we propose using the hexagonal ...

    **nxing Li, Jiancheng Li, **aochong Tong, Shanshan Li, Haopeng Fan in Journal of Geodesy (2022)

  2. Article

    Open Access

    Global prediction model for COVID-19 pandemic with the characteristics of the multiple peaks and local fluctuations

    With the spread of COVID-19, the time-series prediction of COVID-19 has become a research hotspot. Unlike previous epidemics, COVID-19 has a new pattern of long-time series, large fluctuations, and multiple pe...

    Haoran Dai, Wen Cao, **aochong Tong, Yunxing Yao in BMC Medical Research Methodology (2022)

  3. No Access

    Chapter

    The Transform of the National Geographic Grids for China Based on the Axial Minimum Enclosing Rectangle

    Put forward a method of the transform between the different style of geographic grids, define the axial minimum enclosing rectangle, give the model for the code transform between the theodolite coordinate grid...

    Quanfu Bao, Zhengguo Li, **aochong Tong, Caijiao ** in Knowledge Discovery and Data Mining (2012)