This paper considers nonlinear time-varying (NLTV) compensation for linear time-invariant (LTI) plants subject to persistent bounded disturbances. It is shown using two different approaches that using NLTV compensation instead of LTI compensation does not improve the optimal rejection of persistent bounded disturbances. The first approach is to derive a bound on the achievable performance over ...

We consider the use of linear multivariable feedback control to achieve a nonovershooting step response. A method is given for designing an LTI state feedback controller to asymptotically track a constant step reference with no overshoot and arbitrarily small rise time. Results are given for both minimum phase and nonminimum phase multivariable LTI systems.

The preparation of heterodinuclear complexes, especially those comprising early-late transition metals coordinated by a simple or symmetrical ancillary ligand, represents a fundamental challenge and an opportunity to prepare catalysts benefitting from synergic properties. Here, two new mixed titanium(iv)-zinc(ii) complexes, [LTi(OiPr)2ZnEt] and [LTi(OiPr)2ZnPh], both coordinated by a diphenolat...

Background: Mortality in patients with stages 4 and 5 chronic kidney disease (CKD) is higher than in the general population. Body composition predicts mortality. Our objective was to evaluate the effect of body composition on mortality in patients with stages 4 and 5 non-dialysis CKD. Methods: We performed a prospective study of 356 patients with stages 4 and 5 non-dialysis CKD. At baseline, we...

We investigate the stability conditions for remote state estimation of multiple linear time-invariant (LTI) systems over wireless time-varying communication channels. answer following open problem: what is fundamental requirement on multi-sensor-multi-channel system to guarantee existence a sensor scheduling policy that can stabilize system? propose novel construction and analytical framework d...

For the formation of lymph nodes and Peyer’s patches, lymphoid tissue inducer cells are crucial in triggering stromal cells to recruit and retain hematopoietic cells. Although LTi cells have been observed in fetal spleen, not much is known about fetal spleen development and the role of LTi cells in this process. Here we show that LTi cells collect in a periarteriolar manner in fetal spleen at t...

In this paper, the Linear Time Invariant (LTI) and Periodic (LTP) models of two different implementations DDSRF-PLL in presence voltage imbalance are derived analytically. The accuracy is investigated with time domain simulations, frequency scans, stability analysis. On top this, a guideline for properly choosing between LTI LTP assessment according to degree grid proposed. Furthermore, it reve...

We address the global stabilization of linear time-invariant (LTI) systems when the magnitude of the control input and its successive time derivatives, up to an order p∈N, are bounded by prescribed values. We propose a static state feedback that solves this problem for any admissible LTI systems, namely for stabilizable systems whose internal dynamics has no eigenvalue with positive real part. ...

There are three basic concepts behind the standard feedback optimization setup: the notion of a multi-input, multi-output (MIMO) linear time-invariant (LTI) finite order system, the notion of an internally stable feedback interconnection of two MIMO LTI systems, and the notion of a system norm. In addition, there is a concept of well-posedness of the resulting optimization problem, which has to...