no code implementations • 8 Oct 2024 • Reyhaneh Abdolazimi, Shengmin Jin, Pramod K. Varshney, Reza Zafarani
Noise, traditionally considered a nuisance in computational systems, is reconsidered for its unexpected and counter-intuitive benefits across a wide spectrum of domains, including nonlinear information processing, signal processing, image processing, machine learning, network science, and natural language processing.
no code implementations • 6 May 2024 • Mengchen Fan, Baocheng Geng, Keren Li, Xueqian Wang, Pramod K. Varshney
This paper introduces a representative-based approach for distributed learning that transforms multiple raw data points into a virtual representation.
no code implementations • 30 Nov 2023 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
Our objective is to design a sequential selection policy that dynamically determines which processes to observe at each time with the goal to minimize the delay in making the decision and the total sensing cost.
no code implementations • 14 Sep 2023 • Nandan Sriranga, Saikiran Bulusu, Baocheng Geng, Pramod K. Varshney
The distributed system is such that the sensors and the FC sample observations periodically, where the sampling times are not necessarily synchronous, i. e., the sampling times at different sensors and the FC may be different from each other.
no code implementations • 27 Jun 2023 • Anthony Trezza, Donald J. Bucci Jr., Pramod K. Varshney
However, only a limited discussion has been provided regarding key Gibbs sampler architecture details including the Markov chain Monte Carlo sample generation technique and early termination criteria.
no code implementations • 27 Apr 2023 • Chen Quan, Yunghsiang S. Han, Baocheng Geng, Pramod K. Varshney
The proposed detectors can achieve the detection performance close to the benchmark likelihood ratio test (LRT) detector, which has perfect knowledge of the attack parameters and sparsity degree.
no code implementations • 3 Apr 2023 • Chengxi Li, Gang Li, Zhuoyue Wang, Xueqian Wang, Pramod K. Varshney
For this problem, an unsupervised change detection method has been proposed recently based on the image translation technique of Cycle-Consistent Adversarial Networks (CycleGANs), where one image is translated from its original modality to the modality of the other image so that the difference map can be obtained by performing arithmetical subtraction.
no code implementations • 30 Mar 2023 • Weiming Li, Xueqian Wang, Gang Li, Baocheng Geng, Pramod K. Varshney
To enhance the interpretability of existing neural networks for CD, we propose a knowledge-data-driven heterogeneous CD method based on a copula-guided neural network, named NN-Copula-CD.
no code implementations • 25 Jan 2023 • Chen Quan, Baocheng Geng, Yunghsiang S. Han, Pramod K. Varshney
Consequently, the proposed scheme can effectively defend against Byzantine attacks and improve the quality of human sensors' decisions so that the performance of the human-machine collaborative system is enhanced.
no code implementations • 18 Jan 2023 • Baocheng Geng, Chen Quan, Tianyun Zhang, Makan Fardad, Pramod K. Varshney
The amount of resource consumption that maximizes the humans' subjective utility is derived to characterize the actual behavior of humans.
no code implementations • 18 Jan 2023 • Baocheng Geng, Pramod K. Varshney
Recently, modeling of decision making and control systems that include heterogeneous smart sensing devices (machines) as well as human agents as participants is becoming an important research area due to the wide variety of applications including autonomous driving, smart manufacturing, internet of things, national security, and healthcare.
no code implementations • 18 Jan 2023 • Nandan Sriranga, Baocheng Geng, Pramod K. Varshney
In this work, we consider a binary hypothesis testing problem involving a group of human decision-makers.
no code implementations • 8 Nov 2022 • Ayush Kumar Dwivedi, Sachin Chaudhari, Neeraj Varshney, Pramod K. Varshney
The paper also presents simplified expressions for the OP under a high signal-to-noise ratio (SNR) assumption, which are utilized to optimize the system parameters for achieving a target OP.
no code implementations • 18 Jul 2022 • Chen Quan, Nandan Sriranga, Haodong Yang, Yunghsiang S. Han, Baocheng Geng, Pramod K. Varshney
In distributed detection systems, energy-efficient ordered transmission (EEOT) schemes are able to reduce the number of transmissions required to make a final decision.
no code implementations • 17 Mar 2022 • Shan Zhang, Pranay Sharma, Baocheng Geng, Pramod K. Varshney
To achieve greater sensor transmission and estimation efficiency, we propose a two step group-based collaborative distributed estimation scheme, where in the first step, sensors form dependence driven groups such that sensors in the same group are highly dependent, while sensors from different groups are independent, and perform a copula-based maximum a posteriori probability (MAP) estimation via intragroup collaboration.
no code implementations • 9 Mar 2022 • Pranay Sharma, Rohan Panda, Gauri Joshi, Pramod K. Varshney
In this paper, we consider nonconvex minimax optimization, which is gaining prominence in many modern machine learning applications such as GANs.
no code implementations • 21 Jan 2022 • Chen Quan, Saikiran Bulusu, Baocheng Geng, Pramod K. Varshney
The ordered transmission (OT) scheme reduces the number of transmissions needed in the network to make the final decision, while it maintains the same probability of error as the system without using OT scheme.
no code implementations • 3 Jan 2022 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
Based on the received observations, the decisionmaker first determines whether to declare that the number of anomalies has exceeded the threshold or to continue taking observations.
no code implementations • 8 Dec 2021 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
In this setting, we develop an anomaly detection algorithm that chooses the processes to be observed at a given time instant, decides when to stop taking observations, and declares the decision on anomalous processes.
no code implementations • 11 Aug 2021 • Anthony Trezza, Donald J. Bucci Jr., Pramod K. Varshney
A naive construction of the multi-sensor measurement adaptive birth set distribution leads to an exponential number of newborn components in the number of sensors.
no code implementations • NeurIPS 2021 • Prashant Khanduri, Pranay Sharma, Haibo Yang, Mingyi Hong, Jia Liu, Ketan Rajawat, Pramod K. Varshney
Despite extensive research, for a generic non-convex FL problem, it is not clear, how to choose the WNs' and the server's update directions, the minibatch sizes, and the local update frequency, so that the WNs use the minimum number of samples and communication rounds to achieve the desired solution.
no code implementations • 12 May 2021 • Geethu Joseph, Chen Zhong, M. Cenk Gursoy, Senem Velipasalar, Pramod K. Varshney
In this paper, we address the anomaly detection problem where the objective is to find the anomalous processes among a given set of processes.
no code implementations • 12 May 2021 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
In this setting, we develop an anomaly detection algorithm that chooses the process to be observed at a given time instant, decides when to stop taking observations, and makes a decision regarding the anomalous processes.
no code implementations • 24 Dec 2020 • Chengxi Li, Gang Li, Pramod K. Varshney
In this paper, we investigate the problem of decentralized federated learning (DFL) in Internet of things (IoT) systems, where a number of IoT clients train models collectively for a common task without sharing their private training data in the absence of a central server.
no code implementations • 21 Dec 2020 • Pranay Sharma, Kaidi Xu, Sijia Liu, Pin-Yu Chen, Xue Lin, Pramod K. Varshney
In this work, we focus on the study of stochastic zeroth-order (ZO) optimization which does not require first-order gradient information and uses only function evaluations.
no code implementations • 6 Oct 2020 • Xiancheng Cheng, Prashant Khanduri, Boxiao Chen, Pramod K. Varshney
We propose two versions of compression design, one centralized where the compression strategies are derived at the FC and the other decentralized, where the local sensors compute their individual compression matrices independently.
no code implementations • 17 Jul 2020 • Chen Quan, Animesh Yadav, Baocheng Geng, Pramod K. Varshney, H. Vincent Poor
This paper proposes a novel hybrid-domain (HD) non-orthogonal multiple access (NOMA) approach to support a larger number of uplink users than the recently proposed code-domain NOMA approach, i. e., sparse code multiple access (SCMA).
no code implementations • 11 Jun 2020 • Sijia Liu, Pin-Yu Chen, Bhavya Kailkhura, Gaoyuan Zhang, Alfred Hero, Pramod K. Varshney
Zeroth-order (ZO) optimization is a subset of gradient-free optimization that emerges in many signal processing and machine learning applications.
no code implementations • 26 May 2020 • Geethu Joseph, M. Cenk Gursoy, Pramod K. Varshney
Our objective is to design a sequential sensor selection policy that dynamically determines which processes to observe at each time and when to terminate the detection algorithm.
no code implementations • 1 May 2020 • Prashant Khanduri, Pranay Sharma, Swatantra Kafle, Saikiran Bulusu, Ketan Rajawat, Pramod K. Varshney
In this work, we propose a distributed algorithm for stochastic non-convex optimization.
Optimization and Control Distributed, Parallel, and Cluster Computing
no code implementations • 16 Mar 2020 • Saikiran Bulusu, Bhavya Kailkhura, Bo Li, Pramod K. Varshney, Dawn Song
This survey tries to provide a structured and comprehensive overview of the research on anomaly detection for DL based applications.
no code implementations • 12 Dec 2019 • Pranay Sharma, Swatantra Kafle, Prashant Khanduri, Saikiran Bulusu, Ketan Rajawat, Pramod K. Varshney
For online problems ($n$ unknown or infinite), we achieve the optimal IFO complexity $O(\epsilon^{-3/2})$.
no code implementations • 3 Sep 2019 • Baocheng Geng, Qunwei Li, Pramod K. Varshney
We consider the $M$-ary classification problem via crowdsourcing, where crowd workers respond to simple binary questions and the answers are aggregated via decision fusion.
no code implementations • 31 Jul 2018 • Tiexing Wang, Qunwei Li, Donald J. Bucci, Yingbin Liang, Biao Chen, Pramod K. Varshney
In particular, the error exponent is characterized when either the Kolmogrov-Smirnov distance or the maximum mean discrepancy are used as the distance metric.
no code implementations • 25 Jun 2018 • Kush R. Varshney, Prashant Khanduri, Pranay Sharma, Shan Zhang, Pramod K. Varshney
Such arguments, however, fail to acknowledge that the overall decision-making system is composed of two entities: the learned model and a human who fuses together model outputs with his or her own information.
no code implementations • 1 May 2018 • Baocheng Geng, Qunwei Li, Pramod K. Varshney
In this paper, we present a novel sequential paradigm for classification in crowdsourcing systems.
no code implementations • 29 Jan 2018 • Aditya Vempaty, Bhavya Kailkhura, Pramod K. Varshney
The emerging paradigm of Human-Machine Inference Networks (HuMaINs) combines complementary cognitive strengths of humans and machines in an intelligent manner to tackle various inference tasks and achieves higher performance than either humans or machines by themselves.
no code implementations • 16 Dec 2017 • Bhavya Kailkhura, Jayaraman J. Thiagarajan, Charvi Rastogi, Pramod K. Varshney, Peer-Timo Bremer
Third, we propose an efficient estimator to evaluate the space-filling properties of sample designs in arbitrary dimensions and use it to develop an optimization framework to generate high quality space-filling designs.
no code implementations • 18 Oct 2017 • Sijia Liu, Yanzhi Wang, Makan Fardad, Pramod K. Varshney
In addition to ADMM, implementation of a customized power iteration (PI) method for eigenvalue/eigenvector computation using memristor crossbars is discussed.
no code implementations • 14 Oct 2017 • Qunwei Li, Bhavya Kailkhura, Ryan Goldhahn, Priyadip Ray, Pramod K. Varshney
We also provide conditions on the erroneous updates for exact convergence to the optimal solution.
no code implementations • ICML 2017 • Qunwei Li, Yi Zhou, Yingbin Liang, Pramod K. Varshney
Then, by exploiting the Kurdyka-{\L}ojasiewicz (\KL) property for a broad class of functions, we establish the linear and sub-linear convergence rates of the function value sequence generated by APGnc.
no code implementations • 30 Nov 2016 • Qunwei Li, Bhavya Kailkhura, Jayaraman J. Thiagarajan, Zhenliang Zhang, Pramod K. Varshney
Influential node detection is a central research topic in social network analysis.
no code implementations • 4 Oct 2016 • V. Sriram Siddhardh Nadendla, Swastik Brahma, Pramod K. Varshney
Detection rules have traditionally been designed for rational agents that minimize the Bayes risk (average decision cost).
no code implementations • 1 Feb 2016 • Qunwei Li, Aditya Vempaty, Lav R. Varshney, Pramod K. Varshney
We present an aggregation approach using a weighted majority voting rule, where each worker's response is assigned an optimized weight to maximize the crowd's classification performance.
no code implementations • 22 Jan 2016 • Prashant Khanduri, Bhavya Kailkhura, Jayaraman J. Thiagarajan, Pramod K. Varshney
This paper considers the problem of high dimensional signal detection in a large distributed network whose nodes can collaborate with their one-hop neighboring nodes (spatial collaboration).
no code implementations • 14 Apr 2015 • Bhavya Kailkhura, Swastik Brahma, Pramod K. Varshney
This paper considers the problem of detection in distributed networks in the presence of data falsification (Byzantine) attacks.
no code implementations • 4 Mar 2013 • Onur Ozdemir, Ruoyu Li, Pramod K. Varshney
The performance of a modulation classifier is highly sensitive to channel signal-to-noise ratio (SNR).