## 3 Results
### Analysis of the Global Scientific Collaboration Network: Formation of a Dual-Core Structure
#### 3.2.1 Global Distribution of National/Regional Research Capacities
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Rank**} & \
\begin{tabular}{c} **Countries/** \\ **Regions** \\ \end{tabular} &
\begin{tabular}{c} **Number of** \\ **Publications** \\ \end{tabular} & \multicolumn{1}{c}{**Typical Research Areas**} \\ \hline \multirow{4}{*}{1} & & & Agricultural applications [44; 45], Environmental Monitoring [46], Urban Management [47], Disaster Monitoring [48], Cultural Heritage Protection [58], Water management [59], Wildlife Monitoring [60], Forest monitoring [61], Land Management [62] \\ \hline \multirow{2}{*}{2} & & & Environmental Monitoring [49], Disaster Response [50], Crop Monitoring [51], Biodiversity monitoring [52], Cultural Heritage Protection [53], Urban Plan [54], Infrastructure Monitoring [55], Wildfire Damage Assessment [56], Forest monitoring [57] \\ \hline \multirow{2}{*}{3} & & & Agricultural applications [63], Land cover change [64], Coastline Change and Ocean Monitoring [65], Archaeological exploration [66], Urban management monitoring [67] \\ \hline \multirow{4}{*}{4} & & & Agricultural applications [68], Environmental Monitoring and Disaster Response [69], Heritage Conservation and Archaeology [70], Urban infrastructure monitoring [71], Forest monitoring [72], Volcano monitoring [73] \\ \hline \multirow{2}{*}{5} & & & Agricultural applications [74], Environmental Monitoring [75], Urban planning and infrastructure monitoring [76], Geological Exploration [77], Forest monitoring [78] \\ \hline \multirow{2}{*}{6} & & & Environmental Monitoring and Ecological Protection [79], Forestry Ecosystem Research [80], Water Resources and Coastline Research [81], Agricultural applications [82], Natural disaster monitoring [83], Land Management [84] \\ \hline \multirow{2}{*}{7} & & & Disaster Response [85], Agricultural applications [86], Urban infrastructure monitoring [87], Archaeological research [88], Wildlife Monitoring [89], Forest monitoring [90] \\ \hline \multirow{2}{*}{8} & & & \multicolumn{1}{c}{} \\ \cline{3-4}  & & & Land use and land cover change [91], Tropical forest monitoring and ecosystem research [92], Forest fire monitoring [93], Agricultural applications [94] \\ \hline \multirow{2}{*}{9} & & & Agricultural applications [95], Urban infrastructure monitoring [96], Archaeological research [97], Coastal monitoring [98] \\ \hline \multirow{2}{*}{10} & & & \multicolumn{1}{c}{} \\ \cline{3-4}  & & & Environmental Monitoring and Biodiversity Conservation [100], Urban Management [101] \\ \hline \multirow{2}{*}{11} & & & Agricultural applications [102], Disaster Monitoring [103], Beach and water quality monitoring [104], Forest monitoring [105] \\ \hline \multirow{2}{*}{12} & & & Agricultural applications [106], Environmental Monitoring [107], Urban Plan [108], Forest monitoring [109], Volcano monitoring [110] \\ \hline \multirow{2}{*}{13} & & & Agricultural applications [111], Forest monitoring [112], Urban Management [113], Land use monitoring [114], Glacier Survey [115], Coastline monitoring [116] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: The top 15 countries/regions in terms of publication volume and their main research fields.