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1. Time-Varying Queues

   Whitt, Ward (January 2018, Queueing models and service management)

   Service systems abound with queues, but the most natural direct models are often time-varying queues, which may require nonstandard analysis methods beyond stochastic textbooks. This paper provides an overview of time-varying queues. Most of the recent literature concerns many-server queues, which arise in large-scale service systems, such as in customer contact centers and hospital emergency departments, but there also has been some new work on single-server queues with time-varying arrivals, which arise in some settings, such as airplanes coming to land at an airport, cars coming to a traffic intersection and medical staff waiting for the availability of special operating rooms in a hospital. The understanding of many-server queues and single-server queues is enhanced by heavy-traffic limits, which have been extended to time-varying models as well as stationary models. 

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2. Time-Varying Robust Queueing

   https://doi.org/10.1287/opre.2019.1846  

   Whitt, Ward; You, Wei (September 2019, Operations Research)
3. A Deep Learning Approach to Selecting Representative Time Steps for Time-Varying Multivariate Data

   https://doi.org/10.1109/VISUAL.2019.8933759  

   Porter, William P.; Xing, Yunhao; von Ohlen, Blaise R.; Han, Jun; Wang, Chaoli (October 2019, Proceedings of IEEE VIS Conference (Short Papers))
4. Robustness analysis of uncertain time‐varying systems using integral quadratic constraints with time‐varying multipliers

   https://doi.org/10.1002/rnc.5299  

   Fry, J. Micah; Abou Jaoude, Dany; Farhood, Mazen (December 2020, International Journal of Robust and Nonlinear Control)

   Summary This article presents a dissipativity approach for robustness analysis using the framework of integral quadratic constraints (IQCs). The derived results apply for linear time‐varying nominal systems with uncertain initial conditions. IQC multipliers are used to describe the sets of allowable uncertainty operators, and signal IQC multipliers are used to describe the sets of allowable disturbance signals. The novel concepts of dichotomic nodes and their corresponding factorizations are introduced, which allow for the aforementioned multipliers to be general time‐varying operators. The results are illustrated via the robustness analysis of a flight controller for an unmanned aircraft system tasked to perform a Split‐S maneuver. 

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5. Streaming Approach to In Situ Selection of Key Time Steps for Time-Varying Volume Data

   Wu, Mengxi; Chiang, Yi-Jen; Musco, Christopher (January 2022, Computer graphics forum)