In this paper, the method based on uniform design and neural network is proposed to model the complex system. In order to express the system characteristics all round, uniform design method is used to choose the model...In this paper, the method based on uniform design and neural network is proposed to model the complex system. In order to express the system characteristics all round, uniform design method is used to choose the modeling samples and obtain the overall information of the system;for the purpose of modeling the system or its characteristics, the artificial neural network is used to construct the model. Experiment indicates that this method can model the complex system effectively.展开更多
A fuzzy modeling method for complex systems is studied. The notation of general stochastic neural network (GSNN) is presented and a new modeling method is given based on the combination of the modified Takagi and Suge...A fuzzy modeling method for complex systems is studied. The notation of general stochastic neural network (GSNN) is presented and a new modeling method is given based on the combination of the modified Takagi and Sugeno's (MTS) fuzzy model and one-order GSNN. Using expectation-maximization(EM) algorithm, parameter estimation and model selection procedures are given. It avoids the shortcomings brought by other methods such as BP algorithm, when the number of parameters is large, BP algorithm is still difficult to apply directly without fine tuning and subjective tinkering. Finally, the simulated example demonstrates the effectiveness.展开更多
为提升民航应急管理能力,研究基于《中国民用航空应急管理规定》问卷数据,运用轻量级双向编码器表征模型(A Lite Bidirectional Encoder Representations from Transformers,ALBERT)和潜在狄利克雷分配模型(Latent Dirichlet Allocation...为提升民航应急管理能力,研究基于《中国民用航空应急管理规定》问卷数据,运用轻量级双向编码器表征模型(A Lite Bidirectional Encoder Representations from Transformers,ALBERT)和潜在狄利克雷分配模型(Latent Dirichlet Allocation,LDA)进行文档类别划分,结合K-means和均匀流形逼近与投影方法(Uniform Manifold Approximation and Projection,UMAP)进行文档聚类及可视化,根据复杂网络理论构建关键词共现网络,分析网络特性和节点联系,应用逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)获得节点重要性排序。研究结果显示:网络的平均聚类系数为0.71~0.965,覆盖了不同部门、岗位和环境,代表了民航应急管理的普遍情况;在人员兼职、空管单位、支线机场等应急体系建设存在不足的情况下,建议民航系统通过增设专职应急管理机构、优化资源配置、加强培训支持等方式提升应急管理能力。研究结果可为民航应急体系建设提供数据支持。展开更多
文摘In this paper, the method based on uniform design and neural network is proposed to model the complex system. In order to express the system characteristics all round, uniform design method is used to choose the modeling samples and obtain the overall information of the system;for the purpose of modeling the system or its characteristics, the artificial neural network is used to construct the model. Experiment indicates that this method can model the complex system effectively.
文摘A fuzzy modeling method for complex systems is studied. The notation of general stochastic neural network (GSNN) is presented and a new modeling method is given based on the combination of the modified Takagi and Sugeno's (MTS) fuzzy model and one-order GSNN. Using expectation-maximization(EM) algorithm, parameter estimation and model selection procedures are given. It avoids the shortcomings brought by other methods such as BP algorithm, when the number of parameters is large, BP algorithm is still difficult to apply directly without fine tuning and subjective tinkering. Finally, the simulated example demonstrates the effectiveness.
文摘为提升民航应急管理能力,研究基于《中国民用航空应急管理规定》问卷数据,运用轻量级双向编码器表征模型(A Lite Bidirectional Encoder Representations from Transformers,ALBERT)和潜在狄利克雷分配模型(Latent Dirichlet Allocation,LDA)进行文档类别划分,结合K-means和均匀流形逼近与投影方法(Uniform Manifold Approximation and Projection,UMAP)进行文档聚类及可视化,根据复杂网络理论构建关键词共现网络,分析网络特性和节点联系,应用逼近理想解排序法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)获得节点重要性排序。研究结果显示:网络的平均聚类系数为0.71~0.965,覆盖了不同部门、岗位和环境,代表了民航应急管理的普遍情况;在人员兼职、空管单位、支线机场等应急体系建设存在不足的情况下,建议民航系统通过增设专职应急管理机构、优化资源配置、加强培训支持等方式提升应急管理能力。研究结果可为民航应急体系建设提供数据支持。