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Glossary

207 technical terms and definitions

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Unidirectional Attention

Unidirectional attention restricts each token to attending only to previous tokens, enabling autoregressive generation. Mechanism: Causal mask applied, position i attends…

Unified Memory

infrastructure

Unified memory is the shared virtual memory model that allows CPU and GPU to access a single logical address space - it simplifies programming by automating page migration, but…

Unified Memory CUDA

managed memory allocation, page migration gpu, prefetching unified memory, memory oversubscription

Unified Memory is the CUDA programming model that provides a single memory address space accessible from both CPU and GPU — automatically migrating data between host and device…

Unified-Virtual-Address-Space Machine Learning

unified virtual address space and translation overhead, unified virtual address, virtual address space, address space translation, space translation overhead, unified virtual

Unified Virtual Address Space and Translation Overhead Introduction & Motivation Unified Virtual Address Space and Translation Overhead addresses a central problem…

Unified Vision-Language Models

multimodal ai

Unified Vision-Language Models are architectures designed to process and generate both visual and textual data — tackling multiple tasks (VQA, captioning, retrieval, generation)…

Uniformity (CVD)

uniformity, film thickness uniformity, deposition uniformity, cvd thickness uniformity, thickness non-uniformity, within wafer uniformity, wafer uniformity map, cvd uniformity calculation, cvd

Uniformity is a statistic, and the statistic that gets quoted decides which problems the fab is able to see. The number almost everyone reports is a half-range: the difference…

Unigram Tokenization

nlp

Unigram tokenization is the subword modeling approach that selects token segmentations by maximizing probability under a unigram language model over candidate pieces - it uses…

Unilm - Unified Language Model

unilm unified language model, unilm unified, unified language, cnn glue mask mt nlg nlp, unilm unified language, unified language model, language model

UniLM - Unified Language Model Introduction & Motivation UniLM: unified pre-training for diverse NLP tasks via shared architecture. Supports understanding, generation, machine…

Union-Find-Disjoint-Sets Machine Learning

union-find disjoint sets, union-find disjoint, disjoint sets

Union-Find Disjoint Sets Introduction & Motivation Union-Find Disjoint Sets addresses a central problem in data-structures process control and operation-amortized-nearly-constant…

Unipc Sampling

generative models

UniPC sampling is the unified predictor-corrector sampling framework that achieves high-order diffusion integration with broad model compatibility - it is designed to deliver…

Universal Adversarial

interpretability

Universal Adversarial is input-agnostic perturbations that cause misclassification across many different samples - It demonstrates shared vulnerabilities in learned…

Universal Adversarial Triggers

ai safety

Universal adversarial triggers are short sequences of tokens that, when prepended or appended to any input, reliably cause a language model to produce specific unwanted behaviors…

Universal Chiplet Interconnect Express

standards

UCIe (Universal Chiplet Interconnect Express) is an open industry standard for connecting chiplets — separate silicon dies — together inside a single package. As monolithic chips…

Universal Chiplet Interconnect Protocol Link Training Prediction Machine Learning

universal chiplet interconnect protocol link training prediction, universal chiplet interconnect, chiplet interconnect protocol, universal chiplet

Universal Chiplet Interconnect Protocol Link Training Prediction with Machine Learning Introduction & Motivation Universal Chiplet Interconnect Protocol Link Training Prediction…

Universal Chiplet Interconnect Test Yield Prediction Machine Learning

universal chiplet interconnect test yield prediction, universal chiplet interconnect, chiplet interconnect test, interconnect test yield, test yield prediction

Universal Chiplet Interconnect Test Yield Prediction with Machine Learning Introduction & Motivation Universal Chiplet Interconnect Test Yield Prediction with Machine Learning…

Universal Domain Adaptation

domain adaptation

Universal Domain Adaptation (UniDA) is a domain adaptation setting where the source and target domains may have different label sets—with categories that are private to…

Universal-Transfer Machine Learning

Universal Domain Adaptation Introduction & Motivation Universal Domain Adaptation addresses a central problem in transfer learning and {target} adaptation: how to Apply {subject}…

Universal Transformers

llm architecture

Universal Transformers are a generalization of the standard transformer architecture that applies the same transformer layer (with shared weights) repeatedly to the input sequence…

Universal Value Function

reinforcement learning advanced

Universal Value Function is value-function approximation that generalizes across states and goals in one model. - It predicts expected return for arbitrary goal conditions instead…

Universal Value Function Approximators

uvfa, reinforcement learning

UVFA (Universal Value Function Approximators) is a framework for generalizing value functions across goals — extending standard value functions to that estimate the expected…

Universally Slimmable Networks

neural architecture

Universally Slimmable Networks (US-Nets) are an extension of slimmable networks that support any arbitrary width multiplier, not just preset values — enabling continuous…

University

universities, academic, research, student, professor, education

Yes, we actively support universities and research institutions through our Academic Program offering 50% discounts on MPW services, free design tool training, and technical…

Univnet

audio & speech

UnivNet is a universal GAN-based neural vocoder designed for multi-speaker and multi-domain audio synthesis. - It targets strong waveform quality without per-speaker fine-tuning…

Unk Token

unk, nlp

UNK token is the special placeholder token used when input text contains symbols or words not represented by the tokenizer vocabulary - it provides fallback handling…

Unlearning

forget, remove

Machine Unlearning What is Machine Unlearning? Removing specific knowledge, behaviors, or data influence from a trained model without full retraining. Why Unlearning? Reason…

Unlearning

ai safety

Unlearning removes specific knowledge or capabilities from trained models for safety, privacy, or compliance. Motivations: Remove copyrighted content, forget personal data (GDPR…

Unobserved Components

time series models

Unobserved components is latent time-series components such as trend and cycle that are inferred from observed signals - State-space estimation recovers hidden components…

Unpatterned Wafer Inspection

bare wafer, substrate inspection, particle detection, surface defect, metrology, substrate

Unpatterned wafer inspection is the metrology process of examining bare silicon wafers before any patterning — using optical, laser scattering, or surface scanning techniques…

Unpatterned Wafer Particle Count Drift Prediction with Machine Learning

unpatterned wafer particle count drift prediction machine learning, unpatterned wafer, particle count drift, unpatterned wafer particle count drift prediction

Unpatterned Wafer Particle Count Drift Prediction with Machine Learning Introduction & Motivation Unpatterned Wafer Particle Count Drift Prediction with Machine Learning addresses…

Unplanned Downtime

manufacturing operations

Unplanned Downtime is unexpected equipment stoppage that interrupts production outside scheduled events - It is a major source of availability loss and schedule instability. What…

Unplanned Maintenance

emergency repair, equipment breakdown

Unplanned Maintenance refers to emergency equipment repairs triggered by unexpected failures, as opposed to scheduled preventive maintenance. What Is Unplanned Maintenance?…

Unrolled-GAN-Training Machine Learning

Unrolled GAN Training Introduction & Motivation Unrolled GAN Training addresses a central problem in generative generation and mode-collapse-prevention synthesis: how to Design…

Unscented Kalman

time series models

Unscented Kalman is nonlinear Kalman filtering using deterministic sigma-point transforms instead of Jacobians. - It better captures nonlinear moment propagation with minimal…

Unscheduled Downtime

production

Unscheduled downtime is unexpected equipment failure or malfunction that halts semiconductor manufacturing without advance planning — the most disruptive and costly type of tool…

Unscheduled Downtime Risk Prediction Machine Learning

unscheduled downtime risk prediction, unscheduled downtime risk, downtime risk prediction, unscheduled downtime, downtime risk, risk prediction

Unscheduled Downtime Risk Prediction with Machine Learning Introduction & Motivation Unscheduled Downtime Risk Prediction with Machine Learning addresses a central problem…

Unscheduled Maintenance

manufacturing operations

Unscheduled Maintenance is reactive maintenance triggered by unexpected equipment faults or alarms - It is a core method in modern semiconductor operations execution workflows.…

Unstructured Pruning

model optimization

Neural network pruning removes weights, channels, or entire structural units from a trained model to reduce its size and computational cost while preserving as much of its…

Unstructured Pruning

model optimization

Neural network pruning removes weights, channels, or entire structural units from a trained model to reduce its size and computational cost while preserving as much of its…

Unsupervised-Audio-Apc Machine Learning

Autoregressive Predictive Coding APC for Acoustic Feature Extraction Introduction & Motivation Autoregressive Predictive Coding APC for Acoustic Feature Extraction addresses…

Unsupervised Domain Adaptation

transfer learning

Unsupervised domain adaptation (UDA) transfers knowledge from a labeled source domain to an unlabeled target domain, addressing distribution shift without requiring any annotated…

Unsupervised Domain Adaptation Alignment Prediction Machine Learning

unsupervised domain adaptation alignment prediction, unsupervised domain adaptation, domain adaptation alignment, adaptation alignment prediction, unsupervised domain

Unsupervised Domain Adaptation Alignment Prediction with Machine Learning Introduction & Motivation Unsupervised Domain Adaptation Alignment Prediction with Machine Learning…

Unsupervised Learning Clustering Dimensionality

pca tsne umap feature manifold, anomaly detection isolation forest autoencoder, vae gan diffusion generative modeling, silhouette elbow cluster validation

Unsupervised Learning Clustering Dimensionality focuses on extracting structure from unlabeled data, enabling teams to discover segments, latent patterns, and outliers when…