基于V-结构&对数似然函数定向与禁忌爬山的贝叶斯网络结构算法

针对爬山算法搜索空间过大和易陷入局部最优的问题，该文提出基于V-结构&对数似然函数定向与禁忌爬山的贝叶斯网络结构算法(VTH)。该算法利用定向最大支撑树约束搜索空间，在最大支撑树定向过程中，提出V-结构与对数似然函数(VLL)结合的定向策略；在评分搜索过程中，提出禁忌爬山(VTH)评分搜索策略，该策略将禁忌表清空机制与爬山搜索的局部择优准则结合，在提高全局寻优能力的同时也能保证搜索效率。该算法与其他算法在Asia, Car, Child和Alarm 4种标准网络中进行仿真实验，对比汉明距离、F1值、平衡评分函数(BSF)值、运行时间4个指标，验证了该算法的有效性。

Bayesian Network Structure Algorithm Based on V-structure & Log-Likelihood Orientation and Tabu Hill Climbing

Hill climbing algorithm has too large search space and is easy to fall into local optimum. In this paper, a new Bayesian network structure algorithm based on V-structure & log-likelihood orientation and Tabu Hill (VTH) climbing is proposed. The algorithm limits the search space by using the oriented maximum weight spanning tree. In the process of maximum weight spanning tree orientation, the orientation strategy based on V-structure and Log-Likelihood (VLL) function is proposed. Tabu Hill Climbing (THC) scoring search strategy is established during the process of search, it combines the tabu list clearing mechanism with the local optimization criteria of hill climbing, the strategy not only ensures the search efficiency, but also improves the global optimization ability. By comparing Hamming distance, F1-value, Balanced Scoring Function(BSF) value and Time with other algorithms in Asia, Car, Child and Alarm standard networks, the effectiveness of the proposed algorithm is verified.