In this paper, we analyze the limiting behavior of the weighted least squares problem minx∈<n Pp i=1 kDi(Aix − bi)k2, where each Di is a positive definite diagonal matrix. We consider the situation where the magnitude of the weights are drastically different block-wisely so that max(D1) ≥ min(D1) À max(D2) ≥ min(D2) À max(D3) ≥ . . . À max(Dp−1) ≥ min(Dp−1)À max(Dp). Here max(·) and min(·) repr...

Real-time modeling of a water distribution system (WDS) is critical step for the control and operation such systems. The nodal demand, as most important time-varying parameter, must be estimated in real time. computational burden demand estimation intensive, leading to inefficiency large-scale networks. Jacobian matrix computation Hessian inversion are main processes that dominate To address th...

This Special Issue is in an exceptional format. Starting with an invited Keynote by Rob Woodbury and Andrew Burrow, the rest of the issue is taken up by invited papers that are responses to Woodbury and Burrow’s paper, written by selected authorities on design. A final short section is devoted to Woodbury and Burrow’s reactions to the responses. Rob Woodbury and Andrew Burrow set the stage in t...