Chemists solve century-old mechanistic puzzle of copper catalyst

The Ullmann reaction is one of the oldest reactions in organometallic chemistry. It is one of the most widely used ...
Wall Street Journal

The ‘Smart’ Restrooms That Can Solve America’s Public Bathroom Crisis

When it comes to the prevalence of public toilets, one analysis suggests the U.S. ranks 30th in the world, tied with Botswana. The obvious solution—just build more of them—doesn’t work.
IEEE

Switched-Gain Observers for Linear Systems by Using Max/Min Lyapunov Functions

Abstract: A new switched-gain observer for linear systems subject to bounded disturbances is proposed. Specifically, we formulate the problem of constructing bimodal switched-gain observers within a ...
IEEE

Interval Estimation for Uncertain Discrete-Time Switched Linear Systems Using $H_{\infty}$ Observer and Zonotopic Techniques

Abstract: This work proposes an interval state estimation method for discrete-time switched linear systems (SLS) systems subject to bounded uncertainties. our task demands us to calculate a zonotopic ...
Frontiers

Improving the convergence of an iterative algorithm for solving arbitrary linear equation systems using classical or quantum binary optimization

1 Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, RJ, Brazil 2 Petróleo Brasileiro S.A., Centro de Pesquisas Leopoldo Miguez de Mello, Rio de Janeiro, Brazil Recent advancements in quantum ...
acm.org

Solving Sparse Linear Systems Faster than Matrix Multiplication

Presenting an algorithm that solves linear systems with sparse coefficient matrices asymptotically faster than matrix multiplication for any ω > 2. Our algorithm can be viewed as an efficient, ...