no code implementations • 23 May 2023 • Tianhong Li, Vibhaalakshmi Sivaraman, Lijie Fan, Mohammad Alizadeh, Dina Katabi
Our experiments on publicly available video conferencing datasets show that Reparo outperforms state-of-the-art FEC-based video conferencing in terms of both video quality (measured by PSNR) and video freezes.
1 code implementation • 4 Feb 2023 • Arash Nasr-Esfahany, Mohammad Alizadeh, Devavrat Shah
We study counterfactual identifiability in causal models with bijective generation mechanisms (BGM), a class that generalizes several widely-used causal models in the literature.
no code implementations • 4 Feb 2023 • Pouya Hamadanian, Arash Nasr-Esfahany, Siddartha Sen, Malte Schwarzkopf, Mohammad Alizadeh
We study online Reinforcement Learning (RL) in non-stationary input-driven environments, where a time-varying exogenous input process affects the environment dynamics.
no code implementations • 11 Dec 2022 • Ziniu Wu, Parimarjan Negi, Mohammad Alizadeh, Tim Kraska, Samuel Madden
Neither classical nor learning-based methods yield satisfactory performance when estimating the cardinality of the join queries.
no code implementations • 21 Sep 2022 • Vibhaalakshmi Sivaraman, Pantea Karimi, Vedantha Venkatapathy, Mehrdad Khani, Sadjad Fouladi, Mohammad Alizadeh, Frédo Durand, Vivienne Sze
We design Gemino, a new neural compression system for video conferencing based on a novel high-frequency-conditional super-resolution pipeline.
no code implementations • 14 Jan 2022 • Pouya Hamadanian, Malte Schwarzkopf, Siddartha Sen, Mohammad Alizadeh
Such agents must explore and learn new environments, without hurting the system's performance, and remember them over time.
1 code implementation • 5 Jan 2022 • Abdullah Alomar, Pouya Hamadanian, Arash Nasr-Esfahany, Anish Agarwal, Mohammad Alizadeh, Devavrat Shah
Key to CausalSim is mapping unbiased trace-driven simulation to a tensor completion problem with extremely sparse observations.
no code implementations • 19 Dec 2021 • Seo Jin Park, Joshua Fried, Sunghyun Kim, Mohammad Alizadeh, Adam Belay
As emerging deep neural network (DNN) models continue to grow in size, using large GPU clusters to train DNNs is becoming an essential requirement to achieving acceptable training times.
no code implementations • 13 Oct 2021 • Favyen Bastani, Songtao He, Satvat Jagwani, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Sam Madden, Mohammad Amin Sadeghi
To address this challenge, much work has studied automatically processing geospatial data sources such as GPS trajectories and satellite images to reduce the cost of maintaining digital maps.
1 code implementation • ICCV 2021 • Mehrdad Khani, Vibhaalakshmi Sivaraman, Mohammad Alizadeh
SRVC decodes the video by passing the decompressed low-resolution video frames through the (time-varying) super-resolution model to reconstruct high-resolution video frames.
no code implementations • 24 Mar 2021 • Songtao He, Favyen Bastani, Mohammad Alizadeh, Hari Balakrishnan, Michael Cafarella, Tim Kraska, Sam Madden
We show TagMe can produce high-quality object annotations in a fully-automatic and low-cost way.
no code implementations • ICCV 2021 • Songtao He, Mohammad Amin Sadeghi, Sanjay Chawla, Mohammad Alizadeh, Hari Balakrishnan, Samuel Madden
Traffic accidents cost about 3% of the world's GDP and are the leading cause of death in children and young adults.
no code implementations • 12 Dec 2020 • Vikram Nathan, Jialin Ding, Tim Kraska, Mohammad Alizadeh
Unlike prior work, Cortex can adapt itself to any existing primary index, whether single or multi-dimensional, to harness a broad variety of correlations, such as those that exist between more than two attributes or have a large number of outliers.
no code implementations • NeurIPS Workshop LMCA 2020 • Ravichandra Addanki, Vinod Nair, Mohammad Alizadeh
Results on several datasets show that it is possible to learn a neighbor selection policy that allows LNS to efficiently find good solutions.
no code implementations • 28 Aug 2020 • Hongzi Mao, Shannon Chen, Drew Dimmery, Shaun Singh, Drew Blaisdell, Yuandong Tian, Mohammad Alizadeh, Eytan Bakshy
Client-side video players employ adaptive bitrate (ABR) algorithms to optimize user quality of experience (QoE).
1 code implementation • ECCV 2020 • Songtao He, Favyen Bastani, Satvat Jagwani, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Mohamed M. Elshrif, Samuel Madden, Amin Sadeghi
Inferring road graphs from satellite imagery is a challenging computer vision task.
no code implementations • 23 Jun 2020 • Jialin Ding, Vikram Nathan, Mohammad Alizadeh, Tim Kraska
Filtering data based on predicates is one of the most fundamental operations for any modern data warehouse.
1 code implementation • ICCV 2021 • Mehrdad Khani, Pouya Hamadanian, Arash Nasr-Esfahany, Mohammad Alizadeh
Real-time video inference on edge devices like mobile phones and drones is challenging due to the high computation cost of Deep Neural Networks.
1 code implementation • 28 Dec 2019 • Songtao He, Favyen Bastani, Satvat Jagwani, Edward Park, Sofiane Abbar, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Samuel Madden, Mohammad Amin Sadeghi
The usage of graph neural networks allows information propagation on the road network graph and eliminates the receptive field limitation of image classifiers.
no code implementations • 3 Dec 2019 • Vikram Nathan, Jialin Ding, Mohammad Alizadeh, Tim Kraska
Scanning and filtering over multi-dimensional tables are key operations in modern analytical database engines.
1 code implementation • NeurIPS 2019 • Ravichandra Addanki, Shaileshh Bojja Venkatakrishnan, Shreyan Gupta, Hongzi Mao, Mohammad Alizadeh
We present Placeto, a reinforcement learning (RL) approach to efficiently find device placements for distributed neural network training.
no code implementations • 2 Oct 2019 • Favyen Bastani, Songtao He, Satvat Jagwani, Edward Park, Sofiane Abbar, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Sam Madden, Mohammad Amin Sadeghi
Through an evaluation on a large-scale dataset including satellite imagery, GPS trajectories, and ground-truth map data in forty cities, we show that Mapster makes automation practical for map editing, and enables the curation of map datasets that are more complete and up-to-date at less cost.
2 code implementations • 25 Sep 2019 • Lei Yang, Vivek Bagaria, Gerui Wang, Mohammad Alizadeh, David Tse, Giulia Fanti, Pramod Viswanath
Bitcoin is the first fully-decentralized permissionless blockchain protocol to achieve a high level of security, but at the expense of poor throughput and latency.
Distributed, Parallel, and Cluster Computing Cryptography and Security Networking and Internet Architecture
3 code implementations • 20 Jun 2019 • Ravichandra Addanki, Shaileshh Bojja Venkatakrishnan, Shreyan Gupta, Hongzi Mao, Mohammad Alizadeh
Unlike prior approaches that only find a device placement for a specific computation graph, Placeto can learn generalizable device placement policies that can be applied to any graph.
no code implementations • 17 Jun 2019 • Favyen Bastani, Songtao He, Sofiane Abbar, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Sam Madden
Systems to automatically infer road network graphs from aerial imagery and GPS trajectories have been proposed to improve coverage of road maps.
1 code implementation • 11 Jun 2019 • Mehrdad Khani, Mohammad Alizadeh, Jakob Hoydis, Phil Fleming
We propose MMNet, a deep learning MIMO detection scheme that significantly outperforms existing approaches on realistic channels with the same or lower computational complexity.
no code implementations • ICLR 2019 • Ravichandra Addanki, Mohammad Alizadeh, Shaileshh Bojja Venkatakrishnan, Devavrat Shah, Qiaomin Xie, Zhi Xu
AlphaGo Zero (AGZ) introduced a new {\em tabula rasa} reinforcement learning algorithm that has achieved superhuman performance in the games of Go, Chess, and Shogi with no prior knowledge other than the rules of the game.
no code implementations • 3 Oct 2018 • Hongzi Mao, Malte Schwarzkopf, Shaileshh Bojja Venkatakrishnan, Zili Meng, Mohammad Alizadeh
Efficiently scheduling data processing jobs on distributed compute clusters requires complex algorithms.
1 code implementation • SIGCOMM '18 2018 • Akshay Narayan, Frank Cangialosi, Deepti Raghavan, Prateesh Goyal Srinivas Narayana, Radhika Mittal, Mohammad Alizadeh, Hari Balakrishnan
Each datapath—such as the Linux kernel TCP, UDP-based QUIC, or kernel-bypass transports like mTCP-on-DPDK—summarizes information about packet round-trip times, receptions, losses, and ECN via a well-defined interface to algorithms running in the off-datapath Congestion Control Plane (CCP).
no code implementations • ICLR 2019 • Hongzi Mao, Shaileshh Bojja Venkatakrishnan, Malte Schwarzkopf, Mohammad Alizadeh
We consider reinforcement learning in input-driven environments, where an exogenous, stochastic input process affects the dynamics of the system.
no code implementations • ICLR 2018 • Shaileshh Bojja Venkatakrishnan, Mohammad Alizadeh, Pramod Viswanath
By not limiting the representation to a fixed dimension, Graph2Seq scales naturally to graphs of arbitrary sizes and shapes.
1 code implementation • CVPR 2018 • Favyen Bastani, Songtao He, Sofiane Abbar, Mohammad Alizadeh, Hari Balakrishnan, Sanjay Chawla, Sam Madden, David DeWitt
Mapping road networks is currently both expensive and labor-intensive.