In this paper we give a survey on balanced truncation model order reduction for linear time-invariant continuous-time systems in descriptor form. We first give a brief overview of the basic concepts from linear system theory and then present balanced truncation model reduction methods for descriptor systems and discuss their algorithmic aspects. The efficiency of these methods is demonstrated b...

in order to study the morphological, phenological and yield characteristics of 70 desi chickpea genotypes, a trial was conducted on 2007 in research farm of agriculture faculty of ferdowsi university of mashhad. in this study, 70 desi chickpea genotypes from ferdowsi university of mashhad seed bank, were planted in plots without replication including one to four planting rows at maximum length ...

The positive stabilization problem of discrete-time descriptor systems by means of state-feedback control is studied here. Thus, conditions are developed for a state-feedback controller to make the controlled descriptor system simultaneously stable and positive. An illustrative example is provided to illustrate the proposed approach.

In this paper, we give a numerically reliable algorithm to compute the zeros of a periodic descriptor system. The algorithm is a variant of the staircase algorithm applied to the system pencil of an equivalent lifted time-invariant state-space system and extracts a low-order pencil which contains the zeros (both 6nite and in6nite) as well as the Kronecker structure of the periodic descriptor sy...

In this paper, we describe the system including image preprocessing, feature descriptor extraction, classification method and fusion techniques that we applied for LifeCLEF 2015 multi-organ plant identification task. In the preprocessing step, we apply relevant preprocessing techniques for each type of plants’ organs based on the characteristic of the organs. For the feature descriptor, we prop...

In this paper, the problem of H∞ filtering for a class of discrete-time switched systems with unknown inputs is investigated. By using switched Lyapunov functionals, sufficient conditions for the solution of this problem are obtained in terms of linear matrix inequalities (LMIs). Filtering is envisaged both with proportional and proportional integral observers. In addition, the results obtained...

This paper considers the in"nite horizon nonlinear quadratic optimal control problem for a singularly perturbed system which is nonlinear in both, the slow and the fast variables. The relationship between this problem and the analogous one for a descriptor system is investigated. Parameter-independent controllers are constructed that solve the problem for the descriptor system and lead the full...

This paper develops a design of feedforward control for descriptor system with unmeasurable disturbance which are either nonregular or if it is regular, has impulsive mode. To solve this problem, we will transform descriptor system into regular state space system using the output feedback. First, fault detection and isolation(FDI) approach using sliding mode observer is applied for estimating u...

In this article, the non-descriptor output feedback controller for extended strictly positive real (ESPR) control problem of continuous-time descriptor systems is proposed. More precisely, the proposed controller will achieve the ESPR property for the closed-loop transfer matrices while the regularity, impulse immunity and stability of the closed-loop system can be guaranteed. Furthermore, the ...

This paper addresses the problem of constructing controlled invariant polyhedral sets for linear discrete-time descriptor systems subject to state and control constraints and persistent disturbances. Regardless the large number of contributions on set invariance for linear systems in the standard form, there are few works dealing with set invariance properties in the case of descriptor systems....