基于多模型融合的交通流量预测

针对现代交通中的一个重要问题:交通拥堵,现提出概念对交通状况进行实时准确的预测,即能有效的缓解交通拥堵。本文提出采用多模型融合的方式,对由官方提供的数据进行了仿真实验,首先通过数据预处理去除噪声数据,随后进行四个方向的特征构造,分别为:道路基本信息、短时间内道路上下游数据、几天前此时刻的交通数值、基本时间特征,再通过xgboost模型与lightbm两种算法进行训练加权融合进行交通预测,通过实验仿真验证该方法能够准确的进行道路交通流量的实时预测。     

一种基于XGboost的异常检测算法

为了提高异常检测的准确性和高效性,提出了基于xgboost的异常检测算法。首先对异常检测当前遇到的挑战进行分析,指出缺少样本和模型泛化是异常检测中的难点。在此基础上设计了异常注入算法,利用3sigma原则对数据集进行扩充;然后设计特征提取器,针对正常数据和异常数据的特点设计相关特征;最后选择xgboost模型对时序数据进行异常检测。此异常检测流程提高了异常检测的准确性和泛化能力。通过在KPI公共数据集上进行实验,验证了该设计的准确性和有效性。     

基于机器学习的自动负载均衡方法研究及应用

负载均衡是提升LTE网络容量能力的重要优化手段,由于LTE小区用户在时间上的波动性,常规的人工优化手段很难满足网络优化的需求。本文提出了一种基于机器学习XGBoost用户数预测的自动均衡方法和系统,通过XGBoost对LTE小区未来15 min的用户数量进行精准预测,并根据预测结果进行转移用户数计算,从而实现均衡门限的实时动态调整。该方法在网络应用中取得了良好的效果。     

Machine Learning and Artificial Neural Network for Predicting Heart Failure Risk

Heart failure is now widely spread throughout the world. Heart disease affects approximately 48% of the population. It is too expensive and also difficult to cure the disease. This research paper represents machine learning models to predict heart failure. The fundamental concept is to compare the correctness of various Machine Learning (ML) algorithms and boost algorithms to improve models’ accuracy for prediction. Some supervised algorithms like K-Nearest Neighbor (KNN), Support Vector Machine (SVM), Decision Trees (DT), Random Forest (RF), Logistic Regression (LR) are considered to achieve the best results. Some boosting algorithms like Extreme Gradient Boosting (XGBoost) and CatBoost are also used to improve the prediction using Artificial Neural Networks (ANN). This research also focuses on data visualization to identify patterns, trends, and outliers in a massive data set. Python and Scikit-learns are used for ML. Tensor Flow and Keras, along with Python, are used for ANN model training. The DT and RF algorithms achieved the highest accuracy of 95% among the classifiers. Meanwhile, KNN obtained a second height accuracy of 93.33%. XGBoost had a gratified accuracy of 91.67%, SVM, CATBoost, and ANN had an accuracy of 90%, and LR had 88.33% accuracy.