72 citations · 75 across the 9 of their papers we have counts for
12 papers
Decoupled Marginal Sharpening for Training-Free Inference-Time Scaling
Weixin Wang, Wei Deng, Anderson Schneider +3
We study how to improve LLM reasoning at inference time without updating model weights or using external reward models. Recent reward-free power-sampling methods define the sequenc…
A Bilevel Market Equilibrium Model for Natural Gas Pipeline Network Operations: Convex Relaxations and Single-level Reformulations
Novel Kumar Dey, Afrooz Jalilzadeh, Erfan Yazdandoost Hamedani +2
We propose an integrated market equilibrium model for determining the spot market prices and flow rates in a natural gas pipeline network. The traditional approach solves the marke…
Optimal Control of Dynamic Gas Networks Using Gaussian Processes with Chance-Constraint Reformulation
Taiwo A. Adebiyi, Robert Ferrando, Manuel Garcia +3
Natural gas networks must accommodate variable demand and supply while maintaining pressure across pipelines whose stored gas couples operating decisions through time. Probabilisti…
On Optimal Control of Hybrid Dynamical Systems using Complementarity Constraints
Saif R. Kazi, Kexin Wang, Lorenz T. Biegler
Optimal control for switch-based dynamical systems is a challenging problem in the process control literature. In this study, we model these systems as hybrid dynamical systems wit…
Stochastic Finite Volume Method for Uncertainty Management in Gas Pipeline Network Flows
Saif R. Kazi, Sidhant Misra, Svetlana Tokareva +2
Natural gas consumption by users of pipeline networks is subject to increasing uncertainty that originates from the intermittent nature of electric power loads serviced by gas-fire…
Locational Marginal Pricing of Energy in Pipeline Transport of Natural Gas and Hydrogen with Carbon Offset Incentives
Mo Sodwatana, Saif R. Kazi, Kaarthik Sundar +2
We propose an optimization formulation for locational pricing of energy transported through a pipeline network that carries mixtures of natural gas and hydrogen from distributed so…
Dynamic Optimization and Optimal Control of Hydrogen Blending Operations in Natural Gas Networks
Saif R. Kazi, Kaarthik Sundar, Anatoly Zlotnik
We present a dynamic model for the optimal control problem (OCP) of hydrogen blending into natural gas pipeline networks subject to inequality constraints. The dynamic model is der…
Transitions from Monotonicity to Chaos in Gas Mixture Dynamics in Pipeline Networks
Luke S. Baker, Saif R. Kazi, Anatoly Zlotnik
The blending of hydrogen generated using clean energy into natural gas pipeline networks is proposed in order to utilize existing energy systems for their planned lifetimes while r…
Modeling and Optimization of Steady Flow of Natural Gas and Hydrogen Mixtures in Pipeline Networks
Saif R. Kazi, Kaarthik Sundar, Shriram Srinivasan +1
We extend the canonical problems of simulation and optimization of steady-state gas flows in pipeline networks with compressors to the transport of mixtures of highly heterogeneous…
Optimization of Hydrogen Blending in Natural Gas Networks for Carbon Emissions Reduction
Mo Sodwatana, Saif R. Kazi, Kaarthik Sundar +1
We present an economic optimization problem for allocating the flow of natural gas and hydrogen blends through a large-scale transportation pipeline network. Physical flow of the g…
Optimal Control of Transient Flows in Pipeline Networks with Heterogeneous Mixtures of Hydrogen and Natural Gas
Luke Baker, Saif R. Kazi, Rodrigo B. Platte +1
We formulate a control system model for the distributed flow of mixtures of highly heterogeneous gases through large-scale pipeline networks with time-varying injections of constit…
Contact-Implicit Trajectory Optimization using Orthogonal Collocation
Amir Patel, Stacey Shield, Saif Kazi +2
In this paper we propose a method to improve the accuracy of trajectory optimization for dynamic robots with intermittent contact by using orthogonal collocation. Until recently, m…