Search results for "embeddings"

Hits ?▲	Authors	Title	Venue	Year	Link
8	Luis Villamil, Ryan Bausback, Shaeke Salman, Ting L. Liu, Conrad Horn, Xiuwen Liu	Improved Stock Price Movement Classification Using News Articles Based on Embeddings and Label Smoothing.	CoRR	2023	DBLP DOI BibTeX RDF
8	Farnaz Khun Jush, Tuan Truong, Steffen Vogler, Matthias Lenga	Medical Image Retrieval Using Pretrained Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Ryan Wong 0003, Necati Cihan Camgöz, Richard Bowden	Learnt Contrastive Concept Embeddings for Sign Recognition.	CoRR	2023	DBLP DOI BibTeX RDF
8	Viktor Hangya, Silvia Severini, Radoslav Ralev, Alexander Fraser 0001, Hinrich Schütze	Multilingual Word Embeddings for Low-Resource Languages using Anchors and a Chain of Related Languages.	CoRR	2023	DBLP DOI BibTeX RDF
8	Shashidhar Reddy Javaji, Krutika Sarode	Hybrid Recommendation System using Graph Neural Network and BERT Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Mariella Kast, Jan S. Hesthaven	Positional Embeddings for Solving PDEs with Evolutional Deep Neural Networks.	CoRR	2023	DBLP DOI BibTeX RDF
8	Kamil Tagowski, Piotr Bielak, Jakub Binkowski, Tomasz Kajdanowicz	RAFEN - Regularized Alignment Framework for Embeddings of Nodes.	CoRR	2023	DBLP DOI BibTeX RDF
8	Patric Bonnier, Harald Oberhauser, Zoltán Szabó	Kernelized Cumulants: Beyond Kernel Mean Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Bowen Jin, Wentao Zhang, Yu Zhang 0044, Yu Meng 0001, Han Zhao 0002, Jiawei Han 0001	Learning Multiplex Embeddings on Text-rich Networks with One Text Encoder.	CoRR	2023	DBLP DOI BibTeX RDF
8	Haonan Hu, Dazhong Rong, Jianhai Chen, Qinming He, Zhenguang Liu	CoMeta: Enhancing Meta Embeddings with Collaborative Information in Cold-start Problem of Recommendation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Daniel Campos, Alessandro Magnani, ChengXiang Zhai	Quick Dense Retrievers Consume KALE: Post Training Kullback Leibler Alignment of Embeddings for Asymmetrical dual encoders.	CoRR	2023	DBLP DOI BibTeX RDF
8	Aryo Pradipta Gema, Dominik Grabarczyk, Wolf De Wulf, Piyush Borole, Javier Antonio Alfaro, Pasquale Minervini, Antonio Vergari, Ajitha Rajan	Knowledge Graph Embeddings in the Biomedical Domain: Are They Useful? A Look at Link Prediction, Rule Learning, and Downstream Polypharmacy Tasks.	CoRR	2023	DBLP DOI BibTeX RDF
8	Huiyuan Chen, Kaixiong Zhou, Kwei-Herng Lai, Chin-Chia Michael Yeh, Yan Zheng 0001, Xia Hu 0001, Hao Yang 0007	Hessian-aware Quantized Node Embeddings for Recommendation.	CoRR	2023	DBLP DOI BibTeX RDF
8	AprilPyone MaungMaung, Isao Echizen, Hitoshi Kiya	Hindering Adversarial Attacks with Multiple Encrypted Patch Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Anas Belfathi, Nicolas Hernandez, Laura Monceaux	Enhancing Pre-Trained Language Models with Sentence Position Embeddings for Rhetorical Roles Recognition in Legal Opinions.	CoRR	2023	DBLP DOI BibTeX RDF
8	M. Manzour, Augusto Luis Ballardini, Rubén Izquierdo, Miguel Ángel Sotelo	Vehicle Lane Change Prediction based on Knowledge Graph Embeddings and Bayesian Inference.	CoRR	2023	DBLP DOI BibTeX RDF
8	Minghan Li 0001, Shuai Li 0014, Wangmeng Xiang, Lei Zhang 0006	MDQE: Mining Discriminative Query Embeddings to Segment Occluded Instances on Challenging Videos.	CoRR	2023	DBLP DOI BibTeX RDF
8	Hendra I. Nurdin	Markovian Embeddings of Non-Markovian Quantum Systems: Coupled Stochastic and Quantum Master Equations for Non-Markovian Quantum Systems.	CoRR	2023	DBLP DOI BibTeX RDF
8	Pranavi Pathakota, Hardik Meisheri, Harshad Khadilkar	DCT: Dual Channel Training of Action Embeddings for Reinforcement Learning with Large Discrete Action Spaces.	CoRR	2023	DBLP DOI BibTeX RDF
8	Kai Liu, Xucheng Wan, Ziqing Du, Huan Zhou 0008	Improving Target Speaker Extraction with Sparse LDA-transformed Speaker Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Hyunjae Lee	D2CSE: Difference-aware Deep continuous prompts for Contrastive Sentence Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Adrien Nivaggioli, Nicolas Pozin, Rémy Peyret, Stéphane Sockeel, Marie Sockeel, Nicolas Nerrienet, Marceau Clavel, Clara Simmat, Catherine Miquel	Classification in Histopathology: A unique deep embeddings extractor for multiple classification tasks.	CoRR	2023	DBLP DOI BibTeX RDF
8	Ryan Kortvelesy, Steven D. Morad, Amanda Prorok	Permutation-Invariant Set Autoencoders with Fixed-Size Embeddings for Multi-Agent Learning.	CoRR	2023	DBLP DOI BibTeX RDF
8	Burooj Ghani, Tom Denton, Stefan Kahl, Holger Klinck	Feature Embeddings from Large-Scale Acoustic Bird Classifiers Enable Few-Shot Transfer Learning.	CoRR	2023	DBLP DOI BibTeX RDF
8	Walid Bendada, Guillaume Salha-Galvan, Romain Hennequin, Thomas Bouabça, Tristan Cazenave	On the Consistency of Average Embeddings for Item Recommendation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Soumyabrata Chaudhuri, Saumik Bhattacharya	ViLP: Knowledge Exploration using Vision, Language, and Pose Embeddings for Video Action Recognition.	CoRR	2023	DBLP DOI BibTeX RDF
8	Vasileios Baltatzis, Luca Costabello	KGEx: Explaining Knowledge Graph Embeddings via Subgraph Sampling and Knowledge Distillation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Rita Torres Sousa, Sara Silva, Heiko Paulheim, Catia Pesquita	Biomedical Knowledge Graph Embeddings with Negative Statements.	CoRR	2023	DBLP DOI BibTeX RDF
8	Wei Zhang, Xu Chen	CMLM-CSE: Based on Conditional MLM Contrastive Learning for Sentence Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Jaya Chaturvedi, Tao Wang, Sumithra Velupillai, Robert Stewart 0002, Angus Roberts	Development of a Knowledge Graph Embeddings Model for Pain.	CoRR	2023	DBLP DOI BibTeX RDF
8	Sébastien Montella, Alexis Nasr, Johannes Heinecke, Frédéric Béchet, Lina Maria Rojas-Barahona	Investigating the Effect of Relative Positional Embeddings on AMR-to-Text Generation with Structural Adapters.	CoRR	2023	DBLP DOI BibTeX RDF
8	Fanny Jourdan, Louis Béthune, Agustin Picard, Laurent Risser, Nicholas Asher	TaCo: Targeted Concept Removal in Output Embeddings for NLP via Information Theory and Explainability.	CoRR	2023	DBLP DOI BibTeX RDF
8	Dhruv Nandakumar, Devin Quinn, Elijah Soba, Eunyoung Kim, Christopher Redino, Chris Chan, Kevin Choi, Abdul Rahman, Edward Bowen	Foundational Models for Malware Embeddings Using Spatio-Temporal Parallel Convolutional Networks.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zhe Jun Tang, Tat-Jen Cham, Haiyu Zhao	ABLE-NeRF: Attention-Based Rendering with Learnable Embeddings for Neural Radiance Field.	CoRR	2023	DBLP DOI BibTeX RDF
8	Khalid Alnajjar, Mika Hämäläinen, Jack Rueter	Sentiment Analysis Using Aligned Word Embeddings for Uralic Languages.	CoRR	2023	DBLP DOI BibTeX RDF
8	Oleg V. Vasilyev 0001, Fumika Isono, John Bohannon	Linear Cross-Lingual Mapping of Sentence Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Francesco Ceccarelli, Lorenzo Giusti, Sean B. Holden, Pietro Liò	Neural Embeddings for Protein Graphs.	CoRR	2023	DBLP DOI BibTeX RDF
8	Pawan Goyal 0003, Süleyman Yildiz, Peter Benner	Deep Learning for Structure-Preserving Universal Stable Koopman-Inspired Embeddings for Nonlinear Canonical Hamiltonian Dynamics.	CoRR	2023	DBLP DOI BibTeX RDF
8	Alessandro Ragano, Jan Skoglund, Andrew Hines	NOMAD: Unsupervised Learning of Perceptual Embeddings for Speech Enhancement and Non-matching Reference Audio Quality Assessment.	CoRR	2023	DBLP DOI BibTeX RDF
8	Filip Klubicka, John D. Kelleher	Probing Taxonomic and Thematic Embeddings for Taxonomic Information.	CoRR	2023	DBLP DOI BibTeX RDF
8	Guanghui Qin, Benjamin Van Durme	Nugget: Neural Agglomerative Embeddings of Text.	CoRR	2023	DBLP DOI BibTeX RDF
8	Chih-Yao Chen, Tun-Min Hung, Yi-Li Hsu, Lun-Wei Ku	Label-Aware Hyperbolic Embeddings for Fine-grained Emotion Classification.	CoRR	2023	DBLP DOI BibTeX RDF
8	Vaggos Chatziafratis, Piotr Indyk	Dimension-Accuracy Tradeoffs in Contrastive Embeddings for Triplets, Terminals & Top-k Nearest Neighbors.	CoRR	2023	DBLP DOI BibTeX RDF
8	Nikolaos-Antonios Ypsilantis, Kaifeng Chen, Bingyi Cao, Mário Lipovský, Pelin Dogan-Schönberger, Grzegorz Makosa, Boris Bluntschli, Mojtaba Seyedhosseini, Ondrej Chum, André Araújo 0001	Towards Universal Image Embeddings: A Large-Scale Dataset and Challenge for Generic Image Representations.	CoRR	2023	DBLP DOI BibTeX RDF
8	Sergi Blanco-Cuaresma, Ioana Ciuca, Alberto Accomazzi, Michael J. Kurtz, Edwin A. Henneken, Kelly E. Lockhart, Félix Grèzes, Thomas Allen, Golnaz Shapurian, Carolyn S. Grant, Donna M. Thompson, Timothy W. Hostetler, Matthew R. Templeton, Shinyi Chen, Jennifer Koch, Taylor Jacovich, Daniel Chivvis, Fernanda de Macedo Alves, Jean-Claude Paquin, Jennifer Bartlett, Mugdha Polimera, Stephanie Jarmak	Experimenting with Large Language Models and vector embeddings in NASA SciX.	CoRR	2023	DBLP DOI BibTeX RDF
8	Shokirbek Shermukhamedov, Dilorom Mamurjonova, Michael Probst	Structure to Property: Chemical Element Embeddings and a Deep Learning Approach for Accurate Prediction of Chemical Properties.	CoRR	2023	DBLP DOI BibTeX RDF
8	Marcelo Fiori, Bernardo Marenco, Federico Larroca, Paola Bermolen, Gonzalo Mateos	Gradient-Based Spectral Embeddings of Random Dot Product Graphs.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zhijin Guo, Zhaozhen Xu, Martha Lewis, Nello Cristianini	EXTRACT: Explainable Transparent Control of Bias in Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Sujoy Bhore, Arnold Filtser, Csaba D. Tóth	Online Duet between Metric Embeddings and Minimum-Weight Perfect Matchings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yuankun Xie, Haonan Cheng, Yutian Wang, Long Ye	An Efficient Temporary Deepfake Location Approach Based Embeddings for Partially Spoofed Audio Detection.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zexiang Liu, Necmiye Ozay, Eduardo D. Sontag	Properties of Immersions for Systems with Multiple Limit Sets with Implications to Learning Koopman Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Xingfang Wu, Heng Li 0007, Nobukazu Yoshioka, Hironori Washizaki, Foutse Khomh	Refining GPT-3 Embeddings with a Siamese Structure for Technical Post Duplicate Detection.	CoRR	2023	DBLP DOI BibTeX RDF
8	Johnathan Chiu, Andi Gu, Matt Zhou	Variable Length Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Alexia Toumpa, Anthony G. Cohn 0001	Object-agnostic Affordance Categorization via Unsupervised Learning of Graph Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Tim Schwabe, Maribel Acosta	Cardinality Estimation over Knowledge Graphs with Embeddings and Graph Neural Networks.	CoRR	2023	DBLP DOI BibTeX RDF
8	Fahime Shahrokh, Nasser Ghadiri, Rasoul Samani, Milad Moradi	Multi-level biomedical NER through multi-granularity embeddings and enhanced labeling.	CoRR	2023	DBLP DOI BibTeX RDF
8	Taichi Aida, Danushka Bollegala	Unsupervised Semantic Variation Prediction using the Distribution of Sibling Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Pascal Passigan, Kidus Yohannes, Joshua Pereira	Continuous Prompt Generation from Linear Combination of Discrete Prompt Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zahra Fatemi, Elena Zheleva	Contagion Effect Estimation Using Proximal Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Fulton Wang, Julius Adebayo, Sarah Tan, Diego García-Olano, Narine Kokhlikyan	Error Discovery by Clustering Influence Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Bo Xiong, Mojtaba Nayyeri, Ming Jin 0005, Yunjie He, Michael Cochez, Shirui Pan, Steffen Staab	Geometric Relational Embeddings: A Survey.	CoRR	2023	DBLP DOI BibTeX RDF
8	Marco Valentino, Danilo S. Carvalho, André Freitas	Multi-Relational Hyperbolic Word Embeddings from Natural Language Definitions.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yufei Cai, Yuxiang Wei 0001, Zhilong Ji, Jinfeng Bai, Hu Han 0001, Wangmeng Zuo	Decoupled Textual Embeddings for Customized Image Generation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Tianqi Li, Guansong Pang, Xiao Bai 0001, Jin Zheng, Lei Zhou 0008, Xin Ning	Learning Adversarial Semantic Embeddings for Zero-Shot Recognition in Open Worlds.	CoRR	2023	DBLP DOI BibTeX RDF
8	Mingxue Xia, Hao Zhu	Interpretable Neural Embeddings with Sparse Self-Representation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Parker Seegmiller, Sarah Masud Preum	Statistical Depth for Ranking and Characterizing Transformer-Based Text Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Ramon Sanabria, Ondrej Klejch, Hao Tang, Sharon Goldwater	Acoustic Word Embeddings for Untranscribed Target Languages with Continued Pretraining and Learned Pooling.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yuan Zhang, Jian Cao 0002, Ling Zhang, Jue Chen, Wenyu Sun, Yuan Wang 0001	Razor SNN: Efficient Spiking Neural Network with Temporal Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yejia Zhang, Pengfei Gu, Nishchal Sapkota, Danny Z. Chen	SwIPE: Efficient and Robust Medical Image Segmentation with Implicit Patch Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Gyandev Gupta, Bashir Rastegarpanah, Amalendu Iyer, Joshua Rubin, Krishnaram Kenthapadi	Measuring Distributional Shifts in Text: The Advantage of Language Model-Based Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Pranjal Srivastava, Pranav Bhatnagar, Anurag Goel	Argument Mining using BERT and Self-Attention based Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Dailé Osorio Roig, Paul A. Gerlitz, Christian Rathgeb, Christoph Busch 0001	Reversing Deep Face Embeddings with Probable Privacy Protection.	CoRR	2023	DBLP DOI BibTeX RDF
8	Ninad Aithal, Chakka Sai Pradeep, Neelam Sinha	MCI Detection using fMRI time series embeddings of Recurrence plots.	CoRR	2023	DBLP DOI BibTeX RDF
8	Xianming Li, Jing Li	AnglE-optimized Text Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Norman P. Jouppi, George Kurian, Sheng Li 0007, Peter C. Ma, Rahul Nagarajan, Lifeng Nai, Nishant Patil, Suvinay Subramanian, Andy Swing, Brian Towles, Cliff Young, Xiang Zhou, Zongwei Zhou, David A. Patterson 0001	TPU v4: An Optically Reconfigurable Supercomputer for Machine Learning with Hardware Support for Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Klim Kireev, Maksym Andriushchenko, Carmela Troncoso, Nicolas Flammarion	Transferable Adversarial Robustness for Categorical Data via Universal Robust Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Seunghwan Lee, Tae Hyun Kim 0006	NoiseTransfer: Image Noise Generation with Contrastive Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Ahmed Adel Attia, Yashish M. Siriwardena, Carol Y. Espy-Wilson	Improving Speech Inversion Through Self-Supervised Embeddings and Enhanced Tract Variables.	CoRR	2023	DBLP DOI BibTeX RDF
8	Lin Tian, Zi Li, Fengze Liu, Xiaoyu Bai, Jia Ge, Le Lu 0001, Marc Niethammer, Xianghua Ye, Ke Yan 0006, Dakai Jin	SAME++: A Self-supervised Anatomical eMbeddings Enhanced medical image registration framework using stable sampling and regularized transformation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zijie J. Wang, Fred Hohman, Duen Horng Chau	WizMap: Scalable Interactive Visualization for Exploring Large Machine Learning Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Jiaxu Liu, Xinping Yi, Tianle Zhang, Xiaowei Huang 0001	Symplectic Structure-Aware Hamiltonian (Graph) Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Qian Chen 0003, Wen Wang, Qinglin Zhang, Siqi Zheng, Chong Deng, Hai Yu, Jiaqing Liu, Yukun Ma, Chong Zhang	Ditto: A Simple and Efficient Approach to Improve Sentence Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Hogun Park, Jennifer Neville	Generating Post-hoc Explanations for Skip-gram-based Node Embeddings by Identifying Important Nodes with Bridgeness.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yongxin Huang, Kexin Wang, Sourav Dutta 0001, Raj Nath Patel, Goran Glavas, Iryna Gurevych	AdaSent: Efficient Domain-Adapted Sentence Embeddings for Few-Shot Classification.	CoRR	2023	DBLP DOI BibTeX RDF
8	Avnish Patel	Word Embeddings for Banking Industry.	CoRR	2023	DBLP DOI BibTeX RDF
8	Amirhossein Kazerouni, Reza Azad, Alireza Hosseini, Dorit Merhof, Ulas Bagci	INCODE: Implicit Neural Conditioning with Prior Knowledge Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Sven Buechel, Udo Hahn	Emotion Embeddings - Learning Stable and Homogeneous Abstractions from Heterogeneous Affective Datasets.	CoRR	2023	DBLP DOI BibTeX RDF
8	Eyal Liron Dolev	Does mBERT understand Romansh? Evaluating word embeddings using word alignment.	CoRR	2023	DBLP DOI BibTeX RDF
8	Christian John Hurry, Emma Slade	Self-supervised learning of multi-omics embeddings in the low-label, high-data regime.	CoRR	2023	DBLP DOI BibTeX RDF
8	Maciej Skorski, Alessandro Temperoni	Exact Non-Oblivious Performance of Rademacher Random Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Shib Sankar Dasgupta, Andrew McCallum, Steffen Rendle, Li Zhang	Answering Compositional Queries with Set-Theoretic Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Roman Kessler, Kiran B. Raja, Juan E. Tapia, Christoph Busch 0001	Towards minimizing efforts for Morphing Attacks - Deep embeddings for morphing pair selection and improved Morphing Attack Detection.	CoRR	2023	DBLP DOI BibTeX RDF
8	Sascha Rechenberger, Thom W. Frühwirth	FreeCHR: An Algebraic Framework for CHR-Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Yeti Ziya Gurbuz, A. Aydin Alatan	Generalizable Embeddings with Cross-batch Metric Learning.	CoRR	2023	DBLP DOI BibTeX RDF
8	Rohit Raj Rai, Amit Awekar	Effect of dimensionality change on the bias of word embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Shabarish Chenakkod, Michal Derezinski, Xiaoyu Dong, Mark Rudelson	Optimal Embedding Dimension for Sparse Subspace Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Jaiveer Gill, Ratul Chakraborty, Reetham Gubba, Amy Liu, Shrey Jain, Chirag Iyer, Obaid Khwaja, Saurav Kumar	Unsupervised Learning of Molecular Embeddings for Enhanced Clustering and Emergent Properties for Chemical Compounds.	CoRR	2023	DBLP DOI BibTeX RDF
8	Anwar Said, Mudassir Shabbir, Tyler Derr, Waseem Abbas, Xenofon D. Koutsoukos	Enhanced Graph Neural Networks with Ego-Centric Spectral Subgraph Embeddings Augmentation.	CoRR	2023	DBLP DOI BibTeX RDF
8	Roberto Martínez-Cruz, Debanjan Mahata, Alvaro J. López-López, José Portela	Enhancing Keyphrase Extraction from Long Scientific Documents using Graph Embeddings.	CoRR	2023	DBLP DOI BibTeX RDF
8	Zehan Li, Xin Zhang 0097, Yanzhao Zhang, Dingkun Long, Pengjun Xie, Meishan Zhang	Towards General Text Embeddings with Multi-stage Contrastive Learning.	CoRR	2023	DBLP DOI BibTeX RDF