A gentle section on the surface (itS gradient angle a≤ 15°) is Called Land price terrace.
本文通过对城市地价的空间分布变化规律的分析研究，利用地价平台、地价陡坡等新概念，探索其时间序列上的演化规律及其动因，力图构筑起城市地价四维空间理论的框架；进而探讨了该理论在实践中的一些应用方向和实用价值。
ased on the topology and morphology, soil analyses, soil dynamics and measured ocean hydrological data of the platform site at Lufeng 13-1, analyses and evaluations were made on seafloor sand wave formations and their stability by a comprehensive method of sedimentology-ocean fluid dynamics-soil dynamics.
根据陆丰１３－１平台场地地形地貌、土质和土力学分析及实测海洋水文资料，采用沉积学－海洋水动力学－土力学综合研究方法，对海底沙波的成因及其稳定性作出分析与评价。