The network planning technique is widely used in engineering construction fields with the advantages of cost reduction and project quality improvement .At present ,there are various kinds of project management softwares with pow -erful functions at home and abroad ,but most of them are designed for the assisted generation of high-rise buildings and bridges with relatively simple structures and not suitable for water conservancy and hydropower projects with larger scales and more influences of natural conditions ,and most of them can provide only part of the functions for the assisted genera -tion of network planning .For this reason ,the assistant generating system suitable for the major hydraulic and hydropower projects based on CBR is established .This system is able to assist the user in generating network plan quickly and is of great significance .A case of water conservancy and hydropower project is used to verify the feasibility and validity of the system .%网络计划技术以其降低成本、提高工程质量等优势被广泛应用于工程建设领域，目前国内外的项目管理软件种类繁多且功能强大，但大多是针对结构相对简单的高层建筑、桥梁等网络进度计划的生成，对于受自然条件影响较大且规模庞大的水利水电工程适用性较差，并且这些软件大多仅能提供部分网络计划辅助生成功能。因此针对网络进度计划辅助生成理论进行研究，构建了基于案例推理技术（CBR）的大型水利水电工程网络进度计划辅助生成系统，该系统能够辅助进度编制人员快速生成网络进度计划，具有极大的现实意义，并将其应用于某水利工程中，验证了该系统的可行性与有效性。
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