Technical stability conditions for some dynamic systems with distributed and concentrated parameters

1994 ◽  
Vol 69 (5) ◽  
pp. 1346-1353
Author(s):  
K. S. Matviichuk
Keyword(s):  
Dynamic Systems ◽  
Stability Conditions ◽  
Technical Stability

Investigation and robust synthesis of polynomials under perturbations based on the root locus parameter distribution diagram

2019 ◽  
Vol 24 (1-2) ◽  
pp. 25-33
Author(s):  
Nesenchuk A.A. ◽  
Keyword(s):  
Dynamic Systems ◽  
Parameter Distribution ◽  
Stability Conditions ◽  
Characteristic Polynomials ◽  
Root Locus ◽  
Distribution Diagram ◽  
Stability Bound ◽  
The Stability ◽  
Polynomial Family ◽  
Interval Polynomials

Investigation of the 4 th order dynamic systems characteristic polynomials behavior in conditions of the interval parametric uncertainties is carried out on the basis of root locus portraits. The roots behavior regularities and corresponding diagrams for the root locus parameter distribution along the asymptotic stability bound are specified for the root locus portraits of the systems. On this basis the stability conditions are derived, graphic-analytical method is worked out for calculating intervals of variation for the polynomial family parameters ensuring its robust stability. The discovered regularities of the system root locus portrait behavior allow to extract hurwitz sub-families from the non-hurwitz families of interval polynomials and to determine whether there exists at least one stable polynomial in the unstable polynomial family.

scholarly journals -Exponential Stability of Nonlinear Impulsive Dynamic Equations on Time Scales

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Veysel Fuat Hatipoğlu ◽  
Deniz Uçar ◽  
Zeynep Fidan Koçak
Keyword(s):  
Exponential Stability ◽  
Time Scales ◽  
Dynamic Systems ◽  
Global Exponential Stability ◽  
Dynamic Equations ◽  
Stability Conditions

The purpose of this paper is to present the sufficient -exponential, uniform exponential, and global exponential stability conditions for nonlinear impulsive dynamic systems on time scales.

Some Stability Results for General Linear Lumped-Parameter Dynamic Systems

1986 ◽  
Vol 53 (1) ◽  
pp. 10-14 ◽  
Author(s):  
M. Ahmadian ◽  
D. J. Inman
Keyword(s):  
Dynamic Systems ◽  
Digital Computer ◽  
High Order ◽  
General Linear ◽  
Stability Conditions ◽  
Stiffness Matrices ◽  
Lumped Parameter ◽  
General Systems ◽  
Convenient Approach ◽  
Stability Results

A technique is presented for stability of equilibrium of general, linear, lumped-parameter dynamic systems. Liapunov functions are used to develop stability conditions that are direct in terms of the mass, damping, and stiffness matrices. The significance of what is presented here is twofold. First, this technique can be applied to general asymmetric systems. Second, it offers direct conditions that can easily be programmed on a digital computer to handle high-order systems. Many previously developed results, such as the KTC theorem and its extensions, are mentioned. Next, it is shown that the present study may provide broader applications because general systems are included and a more convenient approach is offered. Examples are used to illustrate the validity and applications of the presented results.

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Improving Feeding Outcomes in the NICU: Moving From Volume-Driven to Infant-Driven Feeding

2010 ◽  
Vol 19 (3) ◽  
pp. 68-74 ◽  
Author(s):  
Catherine S. Shaker
Keyword(s):  
Intensive Care Unit ◽  
Dynamic Systems ◽  
Neonatal Intensive Care ◽  
Well Being ◽  
Dynamic Systems Theory ◽  
Feeding Problems ◽  
Care Giving ◽  
Extremely Preterm ◽  
Extremely Preterm Infants

Current research on feeding outcomes after discharge from the neonatal intensive care unit (NICU) suggests a need to critically look at the early underpinnings of persistent feeding problems in extremely preterm infants. Concepts of dynamic systems theory and sensitive care-giving are used to describe the specialized needs of this fragile population related to the emergence of safe and successful feeding and swallowing. Focusing on the infant as a co-regulatory partner and embracing a framework of an infant-driven, versus volume-driven, feeding approach are highlighted as best supporting the preterm infant's developmental strivings and long-term well-being.

A Dynamic Systems Approach to Personality

2001 ◽  
Vol 6 (3) ◽  
pp. 172-176 ◽  
Author(s):  
Lawrence A. Pervin
Keyword(s):  
Dynamic Systems ◽  
Systems Approach ◽  
Biological Processes ◽  
Recent Advances ◽  
Dynamic View ◽  
The Future ◽  
History Of

David Magnusson has been the most articulate spokesperson for a holistic, systems approach to personality. This paper considers three concepts relevant to a dynamic systems approach to personality: dynamics, systems, and levels. Some of the history of a dynamic view is traced, leading to an emphasis on the need for stressing the interplay among goals. Concepts such as multidetermination, equipotentiality, and equifinality are shown to be important aspects of a systems approach. Finally, attention is drawn to the question of levels of description, analysis, and explanation in a theory of personality. The importance of the issue is emphasized in relation to recent advances in our understanding of biological processes. Integrating such advances into a theory of personality while avoiding the danger of reductionism is a challenge for the future.

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