系统采用决策树方法作为数据挖掘方法的基本算法，采用训练与学习相结合实现土地定级估价。
For land grading and evaluating, training and learning method is adopted and the integration of them implemented.
原国家土地管理局分别于1989年和1993年颁布了《城镇土地定级规程》和《城镇土地估价规程》，时至今日，基准地价的评估技术与方法已经日臻完善。
The ministry of land and resources issued regulations for gradation and classification on urban land in 1989, and regulations for valuation on urban land in 1993.
原国家土地管理局分别于1989年和1993年颁布了《城镇土地定级规程》和《城镇土地估价规程》，时至今日，基准地价的评估技术与方法已经日臻完善。
The ministry of land and resources issued regulations for gradation and classification on urban land in 1989, and regulations for valuation on urban land in 1993.
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