《Table 1 Maximum density value of archaeological sites of each culture》

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《9.5–2.3 ka BP燕辽地区考古文化演变及其遗址的时空分布（英文）》

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The density analysis results reveal that the Lower Xiajiadian culture has the largest maximum density value，followed by the Hongshan culture（Table 1）.The Xiaohexi，Xinglongwa，Zhaobaogou and Fuhe cultures have similar maximum density values（approximately 0.037site/km2）.Additionally，spatial density maps（Figure 4）were drawn for each culture.The spatial density values were classified into five classes under a unified standard with geometric intervals，which ensures that each class range has approximately the same number of sites and that the change between intervals is relatively consistent.In Figure 4，three types of spatial distribution pattern can be observed.The first type consists of the Xiaohexi，Xinglongwa，Zhaobaogou，Fuhe and Xiaoheyan cultures.The Hongshan and Lower Xiajiadian cultures represent the second type while the Upper Xiajiadian culture represents the third type.The characteristics and dynamic mechanisms of the revealed spatial distribution patterns are further investigated in the following.