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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 ...
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Article
Open AccessGlobal 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...
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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...