Coupling coordination and obstacle diagnosis of cultivated land ecological security in the middle and lower reaches of the Yellow River

Engineering notes

Key topics: autonomous driving. See the paper for implementation details and experimental results.

Chinese explanation / 中文解读

中文解读待补充：本站会优先为端到端自动驾驶、BEV感知、3D目标检测、轨迹预测、路径规划、LiDAR感知等高价值论文补充中文说明。

Original abstract

Introduction Cultivated land ecological security (CLES) is critical for food security and regional sustainability. Existing studies often assess CLES as a static composite index or focus mainly on external drivers, leaving its internal coupling relationships and obstacle mechanisms insufficiently explained. To address this gap, this study examines CLES in the middle and lower reaches of the Yellow River from 2005 to 2020 at the county scale. Methods A DPSIR-based evaluation system and improved TOPSIS method were used to measure overall and subsystem-level CLES. We further constructed a multidimensional coupling coordination–equilibrium entropy model to quantify coordination among CLES subsystems and determine whether CLES problems stem from an overall decline or structural imbalance. An obstacle degree model identified the dominant obstacle subsystems and limiting factors. Results High-value CLES areas shifted from the Huang-Huai-Hai Plain to the Northern Arid and Semi-arid Region and the southwestern Loess Plateau, while low-value areas shifted in the opposite direction. Subsystems remained mainly at the primary-to-intermediate coordination stage, indicating limited coupling coordination capacity. Equilibrium entropy showed marked spatial differentiation and staged fluctuations, revealing declining coordination stability and constrained ecological sustainability. Dominant obstacles evolved from agricultural non-point source pollution pressure to population–resource constraints and then to structural weaknesses in the agricultural economy. The Pressure subsystem remained the main obstacle, while the Driving Forces subsystem became increasingly restrictive. Discussion These findings support more targeted cultivated land governance in ecologically fragile grain-producing regions.

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