Artificial intelligence and data

Multi-view learning

Multi-view learning is a machine learning approach that trains models on several distinct representations, or views, of the same instances, combining them for greater accuracy.

Multi-view reconstruction is a computer vision method that recovers 3D geometry from overlapping photographs: structure from motion estimates camera poses, and multi-view stereo computes dense point clouds.

Multi-view subspace clustering

Multi-view subspace clustering (MVSC) is an unsupervised machine learning method that groups data described by several views by learning a shared low-dimensional subspace and clustering samples jointly.

Multiclass classification

Multiclass classification is the machine learning task of assigning each input instance to exactly one of three or more classes, extending binary classification; common strategies include one-vs-rest and one-vs-one.

Multidimensional scaling

Multidimensional scaling (MDS), also called principal coordinates analysis, is a family of statistical techniques that represents objects as points in a low-dimensional space whose distances match pairwise dissimilarities.

Multilayer perceptron

A multilayer perceptron (MLP) is a feedforward neural network whose units compute weighted sums plus biases through nonlinear activations, trained by backpropagation; it is the quintessential deep learning model.

Multimodal contrastive learning

Multimodal contrastive learning is a machine learning approach that aligns embeddings of paired data, such as images and text, prominent through CLIP and ALIGN in 2021.

Multiobjective evolutionary algorithm

A multiobjective evolutionary algorithm (MOEA) is a population-based optimization method that uses evolutionary search to approximate the Pareto front of problems with several conflicting objectives.

Multiple kernel learning

Multiple kernel learning (MKL) is a machine learning method that learns a weighted combination of several kernel functions, letting each kernel represent a different data source.

Multiple signal classification

Multiple signal classification (MUSIC) is a subspace-based spectral estimation method invented by Ralph Schmidt in 1979 that estimates directions of arrival of wavefronts from sensor array data.

Multiple-criteria decision analysis

Multiple-criteria decision analysis (MCDA), also called multi-criteria decision-making (MCDM), is a subfield of operational research that helps decision-makers choose, rank, or sort alternatives against several conflicting criteria.

Multiple-instance learning

Multiple-instance learning (MIL) is a weakly supervised machine learning method in which labels apply to whole bags of instances, introduced in 1997 for drug-activity prediction.

Multiscale modeling and simulation

Multiscale modeling and simulation is a computational approach that couples models at different scales, such as QM/MM and the quasicontinuum method, balancing accuracy and efficiency.

Multitask learning

Multitask learning (MTL) is a machine learning method that trains one model on several related tasks simultaneously, sharing a common representation that improves generalization on each task.

Oct 22, 2026

Multitask neural networks for QSAR

Multitask neural networks for QSAR predict the biological activities of chemical compounds against several targets at once, using one shared model instead of a separate QSAR model per endpoint.

Multivariate pattern analysis

Multivariate pattern analysis (MVPA) is a machine learning method that classifies mental states and stimuli from patterns of brain activity across many voxels, introduced by James V. Haxby in 2001.

Multiversion concurrency control

Multiversion concurrency control (MVCC) is a database concurrency control method in which each write creates a new version, so readers see a consistent snapshot and never block writers.

Multiview clustering

Multiview clustering (MVC) is an unsupervised machine learning method that groups data objects by combining several views, or representations, of the same objects, seeking clusterings consistent across views.

MultiWOZ

MultiWOZ (Multi-Domain Wizard-of-Oz) is a fully labeled dataset of about 10,000 human-written task-oriented dialogues, released in 2018 and now a leading benchmark for dialogue state tracking.

MurmurHash

MurmurHash, also known as Murmur3, is a family of fast, non-cryptographic hash functions written by Austin Appleby and placed in the public domain, best known for its 32-bit and 128-bit variants.

Music source separation

Music source separation is a signal processing and machine learning method that splits a mixed music recording into stems such as vocals, drums, bass, and other instruments.

MusicBrainz

MusicBrainz is an open, community-maintained database of music metadata about artists, releases, and recordings, founded by Robert Kaye in 2000 as a non-profit response to the commercialized CDDB.

Mutation (genetic algorithm)

Mutation in a genetic algorithm is the operator that randomly alters individual genes of a candidate solution with a low per-gene probability, maintaining diversity and preventing premature convergence.

Mutation operator

A mutation operator is a variation operator in an evolutionary algorithm that randomly modifies one candidate solution to produce a new one, supplying the variation on which selection acts.

muTransfer

muTransfer (µTransfer) is a hyperparameter tuning technique that tunes a small proxy model and transfers the hyperparameters zero-shot to a large model, introduced by Microsoft Research and OpenAI in 2022.

Mutual exclusion

Mutual exclusion is the requirement that only one thread or process at a time may execute a given code region, enforced by locks, mutexes, and semaphores.

MVTec AD dataset

The MVTec AD dataset is a benchmark for unsupervised anomaly detection in industrial inspection, with 5354 high-resolution images of 15 object and texture categories, introduced at CVPR 2019.

Mycin

Mycin was a rule-based expert system developed at Stanford University in the early 1970s to help physicians diagnose bacterial infections and select antimicrobial therapy, never deployed clinically.

MySQL

MySQL, also known as MySQL server, is an open source SQL relational database management system started in 1995, dual licensed under the GPL, and now developed by Oracle Corporation.