1) The document discusses machine learning algorithms that can be used to detect breast cancer tumors, including artificial neural networks, logistic regression, k-nearest neighbors, decision trees, naive Bayes, support vector machines, random forests, k-means clustering, and Gaussian mixture modeling.
2) It provides an overview of each algorithm and how they are applied to process data and make predictions about breast cancer.
3) The algorithms can be used individually or in ensemble techniques, which combine multiple algorithms to improve prediction accuracy. Ensemble techniques allow for both similar and different base algorithms to be combined.