Dynamics in a two-species competitive model of plankton allelopathy with delays and feedback controls

2016 ◽  
Vol 89 (1-2) ◽  
pp. 1-22 ◽  
Author(s):  
CHANGJIN XU ◽  
QIMING ZHANG ◽  
PEILUAN LI
Keyword(s):  
Feedback Controls ◽  
Competitive Model ◽  
Plankton Allelopathy

scholarly journals Feedback Control in a General Almost Periodic Discrete System of Plankton Allelopathy

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Wenshuang Yin
Keyword(s):  
Feedback Control ◽  
Asymptotic Stability ◽  
Periodic Solutions ◽  
Discrete System ◽  
Almost Periodic Solutions ◽  
Almost Periodic ◽  
Feedback Controls ◽  
Uniformly Asymptotic Stability ◽  
Plankton Allelopathy

We study the properties of almost periodic solutions for a general discrete system of plankton allelopathy with feedback controls and establish a theorem on the uniformly asymptotic stability of almost periodic solutions.

Wage-setting Mechanisms in the Russian Industry

2004 ◽  
pp. 66-90 ◽  
Author(s):  
R. Kapelyushnikov
Keyword(s):  
Special Section ◽  
Close Correlation ◽  
Specific Model ◽  
Wage Determination ◽  
Collective Agreement ◽  
Wage Setting ◽  
Industrial Enterprises ◽  
Subsistence Minimum ◽  
Competitive Model ◽  
Very High

The paper examines a specific model of wage-setting evolved in Russia under transition. Using new survey data author reveals paradoxical characteristics of wage-setting mechanisms at Russian industrial enterprises: very high union and collective agreement coverage; nearly unilateral control of managers over wage determination; close correlation between earnings and enterprises' performance; voluntary utilization of wage standards established by the state. The special section explores effects of fulfilling a new provision stipulated for by the recently adopted Labor Code to raise minimum wage to the subsistence minimum level. The author concludes that wage-setting in the Russian labor market is at odds with a textbook competitive model and poorly fits into many other sophisticated theoretical schemes (such as labor-managed firms, bargaining models etc.).

A sustainable competitive model: the biodynamic farming in Italy

2017 ◽  
pp. 121-128
Author(s):  
Raffaella Pergamo ◽  
Lelio Morra ◽  
Carlo Triarico
Keyword(s):  
Competitive Model

scholarly journals Active control of liquid film flows: beyond reduced-order models

2021 ◽  
Vol 104 (1) ◽  
pp. 267-287
Author(s):  
Radu Cimpeanu ◽  
Susana N. Gomes ◽  
Demetrios T. Papageorgiou
Keyword(s):  
Liquid Film ◽  
Information Transfer ◽  
Analytical Models ◽  
Feedback Controls ◽  
Reduced Order ◽  
Modelling Framework ◽  
Theoretical Approaches ◽  
Active Feedback ◽  
Feedback Strategies ◽  
Set Up

AbstractThe ability to robustly and efficiently control the dynamics of nonlinear systems lies at the heart of many current technological challenges, ranging from drug delivery systems to ensuring flight safety. Most such scenarios are too complex to tackle directly, and reduced-order modelling is used in order to create viable representations of the target systems. The simplified setting allows for the development of rigorous control theoretical approaches, but the propagation of their effects back up the hierarchy and into real-world systems remains a significant challenge. Using the canonical set-up of a liquid film falling down an inclined plane under the action of active feedback controls in the form of blowing and suction, we develop a multi-level modelling framework containing both analytical models and direct numerical simulations acting as an in silico experimental platform. Constructing strategies at the inexpensive lower levels in the hierarchy, we find that offline control transfer is not viable; however, analytically informed feedback strategies show excellent potential, even far beyond the anticipated range of applicability of the models. The detailed effects of the controls in terms of stability and treatment of nonlinearity are examined in detail in order to gain understanding of the information transfer inside the flows, which can aid transition towards other control-rich frameworks and applications.

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