Search Results for author: Ajitesh Srivastava

Found 20 papers, 12 papers with code

Global Prediction of COVID-19 Variant Emergence Using Dynamics-Informed Graph Neural Networks

1 code implementation7 Jan 2024 Majd Al Aawar, Srikar Mutnuri, Mansooreh Montazerin, Ajitesh Srivastava

The current methods for predicting the spread of new variants rely on statistical modeling, however, these methods work only when the new variant has already arrived in the region of interest and has a significant prevalence.

Benchmarking

DTW+S: Shape-based Comparison of Time-series with Ordered Local Trend

no code implementations7 Sep 2023 Ajitesh Srivastava

Measuring distance or similarity between time-series data is a fundamental aspect of many applications including classification, clustering, and ensembling/alignment.

Clustering Dynamic Time Warping +1

Spatio-Temporal Attention in Multi-Granular Brain Chronnectomes for Detection of Autism Spectrum Disorder

no code implementations30 Oct 2022 James Orme-Rogers, Ajitesh Srivastava

The traditional methods for detecting autism spectrum disorder (ASD) are expensive, subjective, and time-consuming, often taking years for a diagnosis, with many children growing well into adolescence and even adulthood before finally confirming the disorder.

The Variations of SIkJalpha Model for COVID-19 Forecasting and Scenario Projections

no code implementations6 Jul 2022 Ajitesh Srivastava

This paper presents the evolution of the SIkJalpha model and its many versions that have been used to submit to these collaborative efforts since the beginning of the pandemic.

Random Forest of Epidemiological Models for Influenza Forecasting

1 code implementation17 Jun 2022 Majd Al Aawar, Ajitesh Srivastava

We demonstrate that our Random Forest-based approach is able to improve upon the forecasts of the individual predictors in terms of mean absolute error, coverage, and weighted interval score.

TransforMAP: Transformer for Memory Access Prediction

no code implementations29 May 2022 Pengmiao Zhang, Ajitesh Srivastava, Anant V. Nori, Rajgopal Kannan, Viktor K. Prasanna

Data Prefetching is a technique that can hide memory latency by fetching data before it is needed by a program.

Decoupling the Depth and Scope of Graph Neural Networks

1 code implementation NeurIPS 2021 Hanqing Zeng, Muhan Zhang, Yinglong Xia, Ajitesh Srivastava, Andrey Malevich, Rajgopal Kannan, Viktor Prasanna, Long Jin, Ren Chen

We propose a design principle to decouple the depth and scope of GNNs -- to generate representation of a target entity (i. e., a node or an edge), we first extract a localized subgraph as the bounded-size scope, and then apply a GNN of arbitrary depth on top of the subgraph.

Link Prediction Node Classification +1

Accelerating Large Scale Real-Time GNN Inference using Channel Pruning

1 code implementation10 May 2021 Hongkuan Zhou, Ajitesh Srivastava, Hanqing Zeng, Rajgopal Kannan, Viktor Prasanna

In this paper, we propose to accelerate GNN inference by pruning the dimensions in each layer with negligible accuracy loss.

Node Classification Spam detection

The EpiBench Platform to Propel AI/ML-based Epidemic Forecasting: A Prototype Demonstration Reaching Human Expert-level Performance

no code implementations4 Feb 2021 Ajitesh Srivastava, Tianjian Xu, Viktor K. Prasanna

In this paper, we introduce a prototype of EpiBench which is currently running and accepting submissions for the task of forecasting COVID-19 cases and deaths in the US states and We demonstrate that we can utilize the prototype to develop an ensemble relying on fully automated epidemic forecasts (no human intervention) that reaches human-expert level ensemble currently being used by the CDC.

Epidemiology

Deep Graph Neural Networks with Shallow Subgraph Samplers

2 code implementations2 Dec 2020 Hanqing Zeng, Muhan Zhang, Yinglong Xia, Ajitesh Srivastava, Andrey Malevich, Rajgopal Kannan, Viktor Prasanna, Long Jin, Ren Chen

We propose a simple "deep GNN, shallow sampler" design principle to improve both the GNN accuracy and efficiency -- to generate representation of a target node, we use a deep GNN to pass messages only within a shallow, localized subgraph.

Accurate, Efficient and Scalable Training of Graph Neural Networks

2 code implementations5 Oct 2020 Hanqing Zeng, Hongkuan Zhou, Ajitesh Srivastava, Rajgopal Kannan, Viktor Prasanna

For feature propagation within subgraphs, we improve cache utilization and reduce DRAM traffic by data partitioning.

Graph Sampling

Fast and Accurate Forecasting of COVID-19 Deaths Using the SIkJ$α$ Model

4 code implementations10 Jul 2020 Ajitesh Srivastava, Tianjian Xu, Viktor K. Prasanna

Many of these methods are based on traditional epidemiological model which rely on simulations or Bayesian inference to simultaneously learn many parameters at a time.

Bayesian Inference

Data-driven Identification of Number of Unreported Cases for COVID-19: Bounds and Limitations

1 code implementation3 Jun 2020 Ajitesh Srivastava, Viktor K. Prasanna

A critical factor that can hinder accurate long-term forecasts, is the number of unreported/asymptomatic cases.

Epidemiology Management

Learning to Forecast and Forecasting to Learn from the COVID-19 Pandemic

1 code implementation23 Apr 2020 Ajitesh Srivastava, Viktor K. Prasanna

In particular, we show that changes in model parameters over time can help us quantify how well a state or a country has responded to the epidemic.

Management

Towards High Performance, Portability, and Productivity: Lightweight Augmented Neural Networks for Performance Prediction

no code implementations17 Mar 2020 Ajitesh Srivastava, Naifeng Zhang, Rajgopal Kannan, Viktor K. Prasanna

More desirable is a high-level language where the domain-specialist simply specifies the workload in terms of high-level operations (e. g., matrix-multiply(A, B)), and the compiler identifies the best implementation fully utilizing the heterogeneous platform.

SPEC2: SPECtral SParsE CNN Accelerator on FPGAs

no code implementations16 Oct 2019 Yue Niu, Hanqing Zeng, Ajitesh Srivastava, Kartik Lakhotia, Rajgopal Kannan, Yanzhi Wang, Viktor Prasanna

On the other hand, weight pruning techniques address the redundancy in model parameters by converting dense convolutional kernels into sparse ones.

Accurate, Efficient and Scalable Graph Embedding

2 code implementations28 Oct 2018 Hanqing Zeng, Hongkuan Zhou, Ajitesh Srivastava, Rajgopal Kannan, Viktor Prasanna

However, a major challenge is to reduce the complexity of layered GCNs and make them parallelizable and scalable on very large graphs -- state-of the art techniques are unable to achieve scalability without losing accuracy and efficiency.

Clustering Graph Embedding +2

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