校园道路多层级空间特征对恢复性的非线性影响研究

——以中国35所大学为例

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Research on the Nonlinear Impact of Multi-level Spatial Characteristics of the Restorativeness of Campus Roads：A Case Study of 35 Universities in China

LIU Chang，LI Zixi， ZHENG Yongrong，XU Nuo， ZHAO Jiayi

基金项目：福建省中青年教师教育科研项目（社科类）一般项目“大学校园道路景观恢复性品质关联物质空间特征研究”（编号：JAS21067）；国家自然科学基金项目“心理危机预警大学生园艺疗法方案制定关键问题研究”（编号：32301661）

Abstract

Keywords

Campus roads serve as vital spaces for college students to connect with nature and gainrestorative benefits.To explore the nonlinear influence of campus road space characteristics on restorativeness from both perceptualand material levels.A totalof105 road imagesfrom35universitiesin Chinaweresampled.Aquestionnaire （n=525） wasused toevaluate their restorativenessand perceptual features，and semantic segmentation was employed to calculate their material features.An XGBoost model was fitted and the SHAP tool was used to interpret the results.Compared with physical features，perceptual features contribute more to restorativeness一the changes in SHAP values of each spatial feature present different linear patterns.The SHAP values of naturalness，beauty，and harmony increaseapproximately monotonically.The SHAP values of colorfulness，layering，and riseinenvironmental brightness are approximately inan inverted U-shaped pattern，with anoptimal feature value range.The SHAP values of novelty，landscape complexity，and building presence increase approximatelyinan inverted L-shaped pattern，withasaturation pointof contribution.The SHAP value ofquietness increasesapproximately ina U-shaped pattern，withanunsuitable feature value range.The SHAPvaluesof the green view ratio and enclosure increase approximatelyinan S-shaped pattern，with both suitableand unsuitable feature value ranges.The influence of spatial features on restorativeness is nonlinear，and features should be regulated within the most effective range.

Campus roadway;Perceived restorativeness; Physical characteristics;Perceptual characteristics; Nonlinear impact

文章亮点

1）在同一模型中比较感知和物质特征对恢复性的相对贡献，明确了感知特征的重要性。（剩余15176字）