通过对两种不同的计量模型结果进行对比分析，找出影响粮食主产区粮食生产技术效率的主要因素。
Through comparing with two different measurement and analysis model, finally find out major factors of affecting technical efficiency in main grain producing districts.
通过成本的对比分析找出国内生产技术的差距，并提出了改进建议。
The gap in the domestic production technology is reviewed through cost comparative analysis and suggestions for improvement are also proposed.
通过对建设三聚氰胺工程项目条件的分析，选择引进高压无催化剂的三聚氰胺生产技术。
The melamine production technology without catalyst under high pressure was selected by analyzing the situation of melamine production project.
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