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新建铁路工程投资巨大，技术复杂，必须在建设前期进行充分的技术经济论证，近３０年来，由于计算机特别是人工智能专家系统的发展，给项目评估手段的现代化和科学化创造了前提条件．因而，有可能针对铁路工程建设项目前期工作的主要内容，根据其特点建立项目评估辅助决策系统，尤其是技术标准和技术方案的确定以及工程造价等评估辅助决策系统更应超前开发研究．这些研究不仅具有较高的理论价值，更具有重大的实用意义
In the past 30 years, due to the huge investment and complex technology in new railway construction, it is necessary to carry out sufficient technical and economic proofs in the early stage of construction. Due to the development of computers, especially artificial intelligence expert systems, the preconditions for the modernization and scientificization of project evaluation methods have been created. Therefore, it is possible to establish a project evaluation aid decision-making system based on its characteristics, especially for the determination of technical standards and technical solutions as well as the construction cost assessment aided decision-making system based on the main contents of the preliminary work of railway construction projects. These studies not only have high theoretical value, but also have great practical significance