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With the increasing demands on e-commerce platforms, numerous user action history is emerging. Those enriched action records are vital to understand users' interests and intents. Recently, prior works for user behavior prediction mainly…

Information Retrieval · Computer Science 2022-02-15 Ruijie Wang , Zheng Li , Danqing Zhang , Qingyu Yin , Tong Zhao , Bing Yin , Tarek Abdelzaher

The watch time is a significant indicator of user satisfaction in video recommender systems. However, the prediction of watch time as a target variable is often hindered by its highly imbalanced distribution with a scarcity of observations…

Information Retrieval · Computer Science 2024-01-17 Jie Sun , Zhaoying Ding , Xiaoshuang Chen , Qi Chen , Yincheng Wang , Kaiqiao Zhan , Ben Wang

The fundamental conflict between the enormous space of adaptive streaming videos and the limited capacity for subjective experiment casts significant challenges to objective Quality-of-Experience (QoE) prediction. Existing objective QoE…

Multimedia · Computer Science 2019-11-20 Zhengfang Duanmu , Wentao Liu , Diqi Chen , Zhuoran Li , Zhou Wang , Yizhou Wang , Wen Gao

Newly developed HTTP-based video streaming technologies enable flexible rate-adaptation under varying channel conditions. Accurately predicting the users' Quality of Experience (QoE) for rate-adaptive HTTP video streams is thus critical to…

We propose a new embedding method, named Quantile-Quantile Embedding (QQE), for distribution transformation and manifold embedding with the ability to choose the embedding distribution. QQE, which uses the concept of quantile-quantile plot…

Machine Learning · Statistics 2021-07-12 Benyamin Ghojogh , Fakhri Karray , Mark Crowley

The Exponentially Weighted Average (EWA) of observations is known to be state-of-art estimator for tracking expectations of dynamically varying data stream distributions. However, how to devise an EWA estimator to rather track quantiles of…

Methodology · Statistics 2019-01-16 Hugo Lewi Hammer , Anis Yazidi , Håvard Rue

A rapid increase in the video traffic together with an increasing demand for higher quality videos has put a significant load on content delivery networks in the recent years. Due to the relatively limited delivery infrastructure, the video…

Estimating causal quantities (CQs) typically requires large datasets, which can be expensive to obtain, especially when measuring individual outcomes is costly. This challenge highlights the importance of sample-efficient active learning…

Machine Learning · Statistics 2025-09-30 Erdun Gao , Dino Sejdinovic

Uncertainty quantification (UQ) provides a resource-efficient solution for on-device monitoring of tinyML models deployed without access to true labels. However, existing UQ methods impose significant memory and compute demands, making them…

Machine Learning · Computer Science 2024-11-19 Nikhil P Ghanathe , Steven J E Wilton

Deep learning has enabled algorithms to generate realistic images. However, accurately predicting long video sequences requires understanding long-term dependencies and remains an open challenge. While existing video prediction models…

Computer Vision and Pattern Recognition · Computer Science 2021-02-23 Vaibhav Saxena , Jimmy Ba , Danijar Hafner

Questions in Community Question Answering (CQA) sites are recommended to users, mainly based on users' interest extracted from questions that users have answered or have asked. However, there is a general phenomenon that users answer fewer…

Information Retrieval · Computer Science 2021-10-12 Nuo Li , Bin Guo , Yan Liu , Lina Yao , Jiaqi Liu , Zhiwen Yu

This paper presents a novel probabilistic forecasting method called ensemble conformalized quantile regression (EnCQR). EnCQR constructs distribution-free and approximately marginally valid prediction intervals (PIs), which are suitable for…

Machine Learning · Computer Science 2022-11-08 Vilde Jensen , Filippo Maria Bianchi , Stian Norman Anfinsen

This paper proposes a new framework to evaluate unconditional quantile effects (UQE) in a data combination model. The UQE measures the effect of a marginal counterfactual change in the unconditional distribution of a covariate on quantiles…

Econometrics · Economics 2021-05-21 Atsushi Inoue , Tong Li , Qi Xu

Unraveling quality of experience (QoE) of video streaming is very challenging in bandwidth shared wireless networks. It is unclear how QoE metrics such as starvation probability and buffering time interact with dynamics of streaming traffic…

Networking and Internet Architecture · Computer Science 2016-04-07 Yuedong Xu , Zhujun Xiao , Hui Feng , Tao Yang , Bo Hu , Yipeng Zhou

Predicting query execution time is a fundamental issue underlying many database management tasks. Existing predictors rely on information such as cardinality estimates and system performance constants that are difficult to know exactly. As…

Databases · Computer Science 2014-08-29 Wentao Wu , Xi Wu , Hakan Hacıgümüş , Jeffrey F. Naughton

Many recommendation systems rely on point-wise models, which score items individually. However, point-wise models generating scores for a video are unable to account for other videos being recommended in a query. Due to this, diversity has…

Information Retrieval · Computer Science 2023-04-18 Khushhall Chandra Mahajan , Aditya Palnitkar , Ameya Raul , Brad Schumitsch

Thanks to the abundance of Web platforms and broadband connections, HTTP Adaptive Streaming has become the de facto choice for multimedia delivery nowadays. However, the visual quality of adaptive video streaming may fluctuate strongly…

Multimedia · Computer Science 2020-02-26 Huyen T. T. Tran , Nam Pham Ngoc , Tobias Hoßfeld , Michael Seufert , Truong Cong Thang

Many recommender systems in long-form video streaming reply on batch-trained models and batch-updated features, where user features are updated daily and served statically throughout the day. While efficient, this approach fails to…

Machine Learning · Computer Science 2025-12-25 Qiang Chen , Venkatesh Ganapati Hegde , Hongfei Li

Power systems operate under uncertainty originating from multiple factors that are impossible to account for deterministically. Distributional forecasting is used to control and mitigate risks associated with this uncertainty. Recent…

Machine Learning · Computer Science 2024-10-07 Slawek Smyl , Boris N. Oreshkin , Paweł Pełka , Grzegorz Dudek

Predicting the future frames of a video is a challenging task, in part due to the underlying stochastic real-world phenomena. Prior approaches to solve this task typically estimate a latent prior characterizing this stochasticity, however…

Computer Vision and Pattern Recognition · Computer Science 2021-10-08 Moitreya Chatterjee , Narendra Ahuja , Anoop Cherian