基于股指成分股基本面和技术面数据构建了时序股票关联网络,然后利用深度图神经网络学习股票关联网络层次化表征,以端到端的方式获得候选预测信号.在此基础上,提出了一种考虑动作评估反馈的深度强化学习方法(Action Evaluation Feedback based Deep Q-Learn-ing,AEF-DQN),旨在将不同的候选预测信号融入智能体的动作空间,并基于股票关联网络层次化表征、股票市场整体运行状态和历史动作评估反馈学习环境状态;借鉴前景理论中的参照依赖特性估计奖励值函数,从而建立状态、动作与奖励值之间的映射关系.最后,采用沪深300指数、标普500指数、英国富时100指数和日经225指数的成分股历史数据,构造了股指期货交易模拟器,在投资胜率、最大回撤率、阿尔法比率和夏普比率4个回测指标上对股指预测模型展开实证分析.研究结果表明:1)通过层次化聚合股票关联网络的节点属性信息可以动态捕捉不同行业对股指价格波动的影响,进而可提升预测方法的准确率;2)考虑动作评估反馈的深度强化学习结构可智能化选择适用于当前股票市场环境的最优模型结构,进而可提升预测方法的鲁棒性.
本文旨在探讨BIM (建筑信息模型)技术在公共体育场馆工程审计中的应用,特别是以某公共体育场馆项目为例,分析BIM技术在设计、招投标、施工、竣工结算和运维等各阶段的具体应用效果。研究发现,BIM技术通过三维建模、数据集成和信息共享,显著提高了项目管理和工程审计的效率与透明度。在设计阶段,BIM有助于碰撞检查和设计优化;在招投标阶段,BIM支持详细的工程量清单编制;在施工阶段,BIM实时记录和监控施工进度和质量;在竣工结算阶段,BIM自动生成和对比工程量清单;在运维阶段,BIM提供完整的工程数据。然而,BIM技术在实际应用中仍面临技术标准不统一、人员培训不足、市场接受度低等挑战。本文通过文献综述和案例分析,提出了相应的改进措施和未来发展方向,旨在为公共体育场馆工程审计中的BIM技术应用提供理论支持和实践指导。This paper aims to explore the application of Building Information Modeling (BIM) technology in the auditing of public sports facilities projects. Specifically, it uses a public sports facility project as a case study to analyze the specific application effects of BIM technology in various stages, including design, bidding, construction, completion settlement, and operation and maintenance. The study finds that BIM technology, through 3D modeling, data integration, and information sharing, signi- ficantly improves the efficiency and transparency of project management and engineering audits. In the design stage, BIM facilitates clash detection and design optimization;in the bidding stage, BIM supports the detailed preparation of bill of quantities;in the construction stage, BIM records and monitors construction progress and quality in real-time;in the completion settlement stage, BIM automatically generates and compares bills of quantities;and in the operation and maintenance stage, BIM provides comprehensive engineering data. However, the practical application of BIM technology still faces challenges such as non-uniform technical standards, insufficient personnel training, and low market acceptance. Through literature review and case analysis, this paper proposes corresponding improvement measures and future development directions, aiming to provide theoretical support and practical guidance for the application of BIM technology in the auditing of public sports facilities projects.
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