23 citations · 67 across the 22 of their papers we have counts for
23 papers
Graph-Theoretic Analyses and Model Reduction for an Open Jackson Queueing Network
Chenyan Zhu, Sandip Roy
A graph-theoretic analysis of the steady-state behavior of an open Jackson queueing network is developed. In particular, a number of queueing-network performance metrics are shown…
Propagation Stability Concepts for Network Synchronization Processes
Sandip Roy, Subir Sarker, Mengran Xue
A notion of disturbance propagation stability is defined for dynamical network processes, in terms of decrescence of an input-output energy metric along cutsets away from the distu…
On the Spatial Pattern of Input-Output Metrics for a Network Synchronization Process
Subir Sarker, Sandip Roy
A graph-theoretic analysis is undertaken for a compendium of input-output (transfer) metrics of a standard discrete-time linear synchronization model, including lp gains, frequency…
Compressive Representations of Weather Scenes for Strategic Air Traffic Flow Management
Sandip Roy
Terse representation of high-dimensional weather scene data is explored, in support of strategic air traffic flow management objectives. Specifically, we consider whether aviation-…
Distinguishing Aerial Intruders from Trajectory Data: A Model-Based Hypothesis-Testing Approach
David Petrizze, Kasra Koorehdavoudi, Mengran Xue +1
Motivated by security needs in unmanned aerial system (UAS) operations, an algorithm for identifying airspace intruders (e.g., birds vs. drones) is developed. The algorithm is stru…
Compressibility of Network Opinion and Spread States in the Laplacian-Eigenvector Basis
Sandip Roy, Mengran Xue
Opinion-evolution and spread processes on networks (e.g., infectious disease spread, opinion formation in social networks) are not only high dimensional but also volatile and multi…
Observability-Blocking Control using Sparser and Regional Feedback for Network Synchronization Processes
Abdullah Al Maruf, Sandip Roy
The design of feedback control systems to block observability in a network synchronization model, i.e. to make the dynamics unobservable from measurements at a subset of the networ…
Cyber-Physical Queueing-Network Model for Risk Management in Next-Generation Emergency Response Systems
Mengran Xue, Sandip Roy
Queueing-network models are developed for enhanced and next-generation 911 (E911 and NG911) systems, which capture both their cyber-components (communications, data-processing) and…
A Note on Surgical Eigenstructure Assignment via State Feedback
Abdullah Al Maruf, Sandip Roy
Assignability of all eigenvalues and a subset of key eigenvectors/generalized eigenvectors of a linear time-invariant system via state feedback is considered. We clarify that, if t…
Resilient Sensor Placement for Kalman Filtering in Networked Systems: Complexity and Algorithms
Lintao Ye, Sandip Roy, Shreyas Sundaram
Given a linear dynamical system affected by noise, we study the problem of optimally placing sensors (at design-time) subject to a sensor placement budget constraint in order to mi…
On the Complexity and Approximability of Optimal Sensor Selection and Attack for Kalman Filtering
Lintao Ye, Nathaniel Woodford, Sandip Roy +1
Given a linear dynamical system affected by stochastic noise, we consider the problem of selecting an optimal set of sensors (at design-time) to minimize the trace of the steady st…
Network Theoretic Analysis of Maximum a Posteriori Detectors for Optimal Input Detection
Rajasekhar Anguluri, Vaibhav Katewa, Sandip Roy +1
This paper considers maximum-a-posteriori (MAP) and linear discriminant based MAP detectors to detect changes in the mean and covariance of a stochastic input, driving specific net…
Small-Signal Stability Analysis for Droop-Controlled Inverter-based Microgrids with Losses and Filtering
Abdullah Al Maruf, Mohammad Ostadijafari, Anamika Dubey +1
An islanded microgrid supplied by multiple distributed energy resources (DERs) often employs droop-control mechanisms for power sharing. Because microgrids do not include inertial…
Averager-copier-voter models for hybrid opinion dynamics in complex networks
Mengran Xue, Sandip Roy
A hybrid model for opinion dynamics in complex multi-agent networks is introduced, wherein some continuous-valued agents average neighbors' opinions to update their own, while othe…
Controllability-Gramian Submatrices for a Network Consensus Model
Sandip Roy, Mengran Xue
Principal submatrices of the controllability Gramian and their inverses are examined, for a network-consensus model with inputs at a subset of network nodes. Specifically, several…
Comments Regarding `On the Identifiability of the Influence Model for Stochastic Spatiotemporal Spread Processes'
Sandip Roy
The identifiability analysis of a networked Markov chain model known as the influence model, as described in a recent contribution to Arxiv, is examined. Two errors in the identifi…
Cyber Threat Impact Analysis to Air Traffic Flows Through Dynamic Queue Networks
Ali Tamimi, Adam Hahn, Sandip Roy
Air traffic control increasingly depends on information and communication technology (ICT) to manage traffic flow through highly congested and increasingly interdependent airspace…
Comment on `Detecting Topology Variations in Networks of Linear Dynamical Systems'
Sandip Roy, Mengran Xue
Conditions for the detectability of topology variations in dynamical networks are developed in a recent article in the IEEE Transactions on Control of Network Systems [1]. Here, an…
Modal Barriers to Controllability in Networks with Linearly-Coupled Homogeneous Subsystems
Mengran Xue, Sandip Roy
The controllability of networks comprising homogeneous multi-input multi-output linear subsystems with linear couplings among them is examined, from a modal perspective. The eigenv…
On the Complexity and Approximability of Optimal Sensor Selection for Kalman Filtering
Lintao Ye, Sandip Roy, Shreyas Sundaram
Given a linear dynamical system, we consider the problem of selecting (at design-time) an optimal set of sensors (subject to certain budget constraints) to minimize the trace of th…
Atypical Stable Multipath Routing Strategy in MANET
Tanaya Roy, Sandip Roy
MANET is a collection of mobile nodes operated by battery source with limited energy reservoir. The dynamic topology and absence of pre-existing infrastructure in MANET makes routi…
The Role of Cloud of Things in Smart Cities
Sandip Roy, Debabrata Sarddar
The recent demographic trends indicate towards a rapidly increasing population growth and a significant portion of this increased population now prefer to live mostly in cities. In…
Mobile-Based Video Caching Architecture Based on Billboard Manager
Rajesh Bose, Sandip Roy, Debabrata Sarddar
Video streaming services are very popular today. Increasingly, users can now access multimedia applications and video playback wirelessly on their mobile devices. However, a signif…