基于混合信息的复杂系统隐藏行为预测新模型

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本文主要探讨了复杂工程系统中隐藏行为的预测,特别关注基于混合信息(包括定性知识和定量数据)的方法。标题《复杂系统基于混合信息的隐藏行为预测》强调了在实际工程系统中,预测可见行为与隐藏行为的重要性,因为后者往往更为复杂且难以准确建模。现有的预测技术往往不能有效地整合不确定性信息,并同时处理定性和定量数据,特别是对于隐性行为的预测。 传统上,Belief Rule Base (BRB) 方法被用于利用混合信息预测可见行为,但直接应用到隐藏行为预测上存在局限性。为此,作者提出了一个全新的BRB为基础的模型,试图解决这一问题。然而,该模型的一个挑战是初始参数通常由专家提供,可能存在不准确性,这可能导致预测结果的偏差。 为了解决参数初始值不精确导致的预测不准确问题,文中提出了一种改进的方法,可能是通过引入更为鲁棒的参数估计技术,或者是通过结合专家知识和数据驱动的优化策略来提高参数的精度。这个改进可能会涉及到数据融合、不确定性量化、机器学习算法或者模糊逻辑等技术,以更好地适应混合信息的特性。 论文的核心内容可能涵盖了以下几点: 1. **混合信息理论**:讨论如何有效地整合定性知识(如专家经验)与定量数据(如历史测量)以提高预测的可靠性。 2. **BRB模型的扩展**:介绍新提出的BRB模型架构,可能包括规则的构建、推理机制以及如何处理不确定性。 3. **参数估计与优化**:提出的方法或算法,以减少初始参数对预测结果的影响,确保模型性能的稳定性和准确性。 4. **验证与实验**:可能展示了通过新模型进行实际复杂系统隐藏行为预测的实验结果,以及与现有方法的对比分析。 5. **应用场景**:论文可能列举了一些具体的应用场景,如工业生产、交通系统或网络安全,来展示混合信息在隐藏行为预测中的实用价值。 6. **未来研究方向**:可能讨论了该方法的局限性和未来改进的潜力,比如考虑实时数据更新、适应动态环境变化的能力等。 这篇研究论文在复杂系统隐藏行为预测领域具有创新意义,它不仅提供了新的预测模型,还解决了混合信息处理中的关键问题,有助于提升工程系统中的决策支持和风险管理能力。

精简下面表达:Existing protein function prediction methods integrate PPI networks and multivariate bioinformatics data to improve the performance of function prediction. By combining multivariate information, the interactions between proteins become diverse. Different interactions’ functions in functional prediction are various. Combining multiple interactions simply between two proteins can effectively reduce the effect of false negatives and increase the number of predicted functions, but it can also increase the number of false positive functions, which contribute to nonobvious enhancement for the overall functional prediction performance. In this article, we have presented a framework for protein function prediction algorithms based on PPI network and semantic similarity with the addition of protein hierarchical functions to them. The framework relies on diverse clustering algorithms and the calculation of protein semantic similarity for protein function prediction. Classification and similarity calculations for protein pairs clustered by the functional feature are more accurate and reliable, allowing for the prediction of protein function at different functional levels from different proteomes, and giving biological applications greater flexibility.The method proposed in this paper performs well on protein data from wine yeast cells, but how well it matches other data remains to be verified. Yet until now, most unknown proteins have only been able to predict protein function by calculating similarities to their homologues. The predictions result of those unknown proteins without homologues are unstable because they are relatively isolated in the protein interaction network. It is difficult to find one protein with high similarity. In the framework proposed in this article, the number of features selected after clustering and the number of protein features selected for each functional layer has a significant impact on the accuracy of subsequent functional predictions. Therefore, when making feature selection, it is necessary to select as many functional features as possible that are important for the whole interaction network. When an incorrect feature was selected, the prediction results will be somewhat different from the actual function. Thus as a whole, the method proposed in this article has improved the accuracy of protein function prediction based on the PPI network method to a certain extent and reduces the probability of false positive prediction results.

2023-02-27 上传

Compared with homogeneous network-based methods, het- erogeneous network-based treatment is closer to reality, due to the different kinds of entities with various kinds of relations [22– 24]. In recent years, knowledge graph (KG) has been utilized for data integration and federation [11, 17]. It allows the knowledge graph embedding (KGE) model to excel in the link prediction tasks [18, 19]. For example, Dai et al. provided a method using Wasser- stein adversarial autoencoder-based KGE, which can solve the problem of vanishing gradient on the discrete representation and exploit autoencoder to generate high-quality negative samples [20]. The SumGNN model proposed by Yu et al. succeeds in inte- grating external information of KG by combining high-quality fea- tures and multi-channel knowledge of the sub-graph [21]. Lin et al. proposed KGNN to predict DDI only based on triple facts of KG [66]. Although these methods have used KG information, only focusing on the triple facts or simple data fusion can limit performance and inductive capability [69]. Su et al. successively proposed two DDIs prediction methods [55, 56]. The first one is an end-to-end model called KG2ECapsule based on the biomedical knowledge graph (BKG), which can generate high-quality negative samples and make predictions through feature recursively propagating. Another one learns both drug attributes and triple facts based on attention to extract global representation and obtains good performance. However, these methods also have limited ability or ignore the merging of information from multiple perspectives. Apart from the above, the single perspective has many limitations, such as the need to ensure the integrity of related descriptions, just as network-based methods cannot process new nodes [65]. So, the methods only based on network are not inductive, causing limited generalization [69]. However, it can be alleviated by fully using the intrinsic property of the drug seen as local information, such as chemical structure (CS) [40]. And a handful of existing frameworks can effectively integrate multi-information without losing induction [69]. Thus, there is a necessity for us to propose an effective model to fully learn and fuse the local and global infor- mation for improving performance of DDI identification through multiple information complementing.是什么意思

2023-06-11 上传

Traditional network security situation prediction methods depend on the accuracy of historical situation value. Moreover, there are differences in correlation and importance among various network security factors. In order to solve these problems, a combined prediction model based on the temporal convolution attention network (TCAN) and bi-directional gate recurrent unit (BiGRU) network optimized by singular spectrum analysis (SSA) and improved quantum particle swarm optimization algorithm (IQPSO) was proposed. This model was first decomposed and reconstructed into a series of subsequences through the SSA of network security situation data. Next, a prediction model of TCAN-BiGRU was established for each subsequence, respectively. The TCN with relatively simple structure was used in the TCAN to extract features from the data. Besides, the improved channel attention mechanism (CAM) was used to extract important feature information from TCN. Afterwards, the before-after status of the learning situation value of the BiGRU neural network was used to extract more feature information from sequences for prediction. Meanwhile, an improved IQPSO was proposed to optimize the hyper-parameter of the BiGRU neural network. Finally, the prediction results of subsequence were superimposed to obtain the final predicted value. In the experiment, on the one hand, the IQPSO was compared with other optimization algorithms; and the results showed that the IQPSO has better optimization performance; on the other hand, the comparison with traditional prediction methods was performed through the simulation experiment and the established prediction model; and the results showed that the combined prediction model established has higher prediction accuracy.

2023-02-19 上传