State space grids: Analyzing dynamics across development

2007 ◽  
Vol 31 (4) ◽  
pp. 384-396 ◽  
Author(s):  
Tom Hollenstein
Keyword(s):  
State Space ◽  
Longitudinal Studies ◽  
Real Time ◽  
Dynamic Systems ◽  
Developmental Change ◽  
Theoretical Models ◽  
The State ◽  
Event Sequences ◽  
The Past ◽  
State Space Grids

Developmentalists are generally interested in systems perspectives and this is reflected in the theoretical models of the past decade. However, the methodological tools to test these models are either nonexistent or difficult for many researchers to use. This article reviews the state space grid (SSG) method for analyzing synchronized event sequences based on dynamic systems (DS) principles. Following a review of these DS concepts and the basics of the SSG method, several studies are reviewed. Greater emphasis and detail are provided for three longitudinal studies that relate real-time socioemotional dynamics to processes of developmental change and stability. The concluding sections provide guidelines for researchers interested in using the SSG method and some suggestions for future SSG studies.

INFORMATION AND TELECOMMUNICATION NETWORK SECURITY MANAGEMENT METHODOLOGY

2021 ◽  
Author(s):  
М.А. КАРПОВ ◽  
М.В. МИТРОФАНОВ ◽  
О.С. ЛАУТА ◽  
Д.А. ПАЛЬЦИН
Keyword(s):  
State Space ◽  
Dynamic Systems ◽  
Telecommunication Network ◽  
The State ◽  
Complex Dynamic ◽  
Computing Power ◽  
Complex Dynamic Systems ◽  
Situational Management ◽  
The Cost ◽  
Network Security Management

Исследуются вопросы ситуативного управления сложными динамическими системами. Анализируются релевантные работы в области ситуативного управления системами защиты. Приводятся результаты разработки алгоритма эффектив -ного управления, позволяющего уменьшать пространство состояний управляемого объекта. Показано, что представленная методика позволяет спрогнозировать количество итераций управления в зависимости от сегмента пространства состояний и выбранного количества переходов. Данный подход позволяет воздействовать на сложные динамические системы в реальном времени, причем затраты на вычислительные мощности системы управления и ее подсистем сокращаются. The issues of situational management of complex dynamic systems are investigated. Relevant works in the field of situational management of protection systems are analyzed. The article presents the results of the development of an efficient control algorithm that allows reducing the state space of the controlled object. The presented technique makes it possible to predict the number of control iterations depending on the segment of the state space and the selected number of transitions. This approach allows you to act on complex dynamic systems in real time, while the cost of the computing power of the control system and its subsystems is reduced. Keywords: INFORMATION AND TELECOMMUNICATION NETWORK, SCRIPT FORECAST, MANAGEMENT SYSTEM, SITUATIONAL MANAGEMENT, ITCN SECURITY SYSTEM

Strategy and dialectics: Rejuvenating a long-standing relationship

2018 ◽  
Vol 17 (1) ◽  
pp. 133-144 ◽  
Author(s):  
Moshe Farjoun
Keyword(s):  
Artificial Intelligence ◽  
Theoretical Models ◽  
Social Processes ◽  
The State ◽  
Strategy Research ◽  
The Past ◽  
New Directions ◽  
Core Questions ◽  
Relational Process

This essay broadens the conversation on the state of organizational contradictions and paradox research by turning to dialectics—a time-honored, living perspective on social processes and relations, which continues to influence our understanding of the past, present, and future. Dialectics distinctive relational process worldview sets it apart from approaches stressing equilibrium, linearity, and coherence, making it highly relevant to a world in flux. I propose that dialectics is already present in strategy research and in contemporary business, and can become even more central to strategy, addressing core questions in the field and propelling it in new directions. Strategy scholars can draw on dialectics principles as a generative tool kit to construct new theories and managerial tools. Dialectics can also be used as a theoretical lens to understand emerging empirical phenomena such as the rapid advent of artificial intelligence. Finally, dialectics critical stance and philosophical grounding makes it a particularly attractive perspective for challenging existing theoretical models and for considering alternatives.

scholarly journals Scrubbing During Learning In Real-time Heuristic Search

2016 ◽  
Vol 57 ◽  
pp. 307-343 ◽  
Author(s):  
Nathan R. Sturtevant ◽  
Vadim Bulitko
Keyword(s):  
State Space ◽  
Real Time ◽  
Lower Bounds ◽  
Heuristic Search ◽  
Search Algorithm ◽  
The State ◽  
Worst Case ◽  
Heuristic Search Algorithm ◽  
Practical Performance ◽  
Theoretical Results

Real-time agent-centered heuristic search is a well-studied problem where an agent that can only reason locally about the world must travel to a goal location using bounded computation and memory at each step. Many algorithms have been proposed for this problem and theoretical results have also been derived for the worst-case performance with simple examples demonstrating worst-case performance in practice. Lower bounds, however, have not been widely studied. In this paper we study best-case performance more generally and derive theoretical lower bounds for reaching the goal using LRTA*, a canonical example of a real-time agent-centered heuristic search algorithm. The results show that, given some reasonable restrictions on the state space and the heuristic function, the number of steps an LRTA*-like algorithm requires to reach the goal will grow asymptotically faster than the state space, resulting in ``scrubbing'' where the agent repeatedly visits the same state. We then show that while the asymptotic analysis does not hold for more complex real-time search algorithms, experimental results suggest that it is still descriptive of practical performance.

scholarly journals On weak lumpability in Markov chains

1989 ◽  
Vol 26 (03) ◽  
pp. 446-457 ◽  
Author(s):  
Gerardo Rubino
Keyword(s):  
Markov Chain ◽  
Markov Chains ◽  
State Space ◽  
The State ◽  
Homogeneous Markov Chain ◽  
Past Work ◽  
The Past ◽  
The Subject

We analyse the conditions under which the aggregated process constructed from an homogeneous Markov chain over a given partition of the state space is also Markov homogeneous. The past work on the subject is revised and new properties are obtained.

scholarly journals On the two-filter approximations of marginal smoothing distributions in general state-space models

2018 ◽  
Vol 50 (01) ◽  
pp. 154-177 ◽  
Author(s):  
Thi Ngoc Minh Nguyen ◽  
Sylvain Le Corff ◽  
Eric Moulines
Keyword(s):  
State Space ◽  
Posterior Distribution ◽  
The State ◽  
State Space Models ◽  
General State ◽  
Rigorous Analysis ◽  
The Past ◽  
Information Filter ◽  
General State Space ◽  
Filter Algorithms

AbstractA prevalent problem in general state-space models is the approximation of the smoothing distribution of a state conditional on the observations from the past, the present, and the future. The aim of this paper is to provide a rigorous analysis of such approximations of smoothed distributions provided by the two-filter algorithms. We extend the results available for the approximation of smoothing distributions to these two-filter approaches which combine a forward filter approximating the filtering distributions with a backward information filter approximating a quantity proportional to the posterior distribution of the state, given future observations.

scholarly journals MODAL CONTROL OF FEEDING PROCESSES IN THE MEDIUM OF STATE SPACE AND WAVELET TRANSFORMS

2019 ◽  
pp. 46-58
Author(s):  
Anna Alekseevna Simikova ◽  
Boris Andreevich Fedosenkov ◽  
Denis Borisovich Fedosenkov
Keyword(s):  
Control System ◽  
State Space ◽  
Real Time ◽  
Flow Rate ◽  
The State ◽  
Transient Processes ◽  
Modal Control ◽  
Frequency Distributions ◽  
Time Frequency ◽  
Computer Aided

The article presents the essential aspects of designing and operational functioning of computer-aided modal control systems, using the example of a control system for feeding processes in а mixture-producing set. The object of study is the structure of feeding devices unit and transient processes during feeding. The subjects of research are the issues of designing and creating a computer-aided modal control system ( CMCS ) which operates in the mode of tunable parametrically non-stationary in frequency transient processes ( TP ). In this case, the scalar signals of the feeding devices ( FD ) material flows are formed in terms of the state space method (in the format of the internal models “input-state-output”), and monitoring of such processes is carried out in the time-frequency wavelet medium. The latter makes it possible to analyze the processes occurring in the CMCS at a semantically transparent and information-saturated level. The parameters (pulse signal off-duty ratios) of the Fourier model for the signals of a discrete-type feeder are presented, on which the nature of the dosing process depends. A model of the feeders unit is formed in terms of the state space. The 1 D -flow rate signals and their representations in the form of time-frequency distributions ( W -maps) are considered. A new concept was developed for flow rate modal control of the feeding devices unit in the frame of the mixture-producing set by introducing the definition of parametric non-stationary state of the feeding devices internal environment that takes into account the real-time variation of the multidimensional state feedback coefficient during transients in the system and for the purpose of experimental estimation of transients parameters ( here: time constants), they are determined by flow signal distributions on W -maps. The wavelet medium used in the system deals with Cohen’s class time-frequency distributions (Wigner-Ville and Choi-Williams transformations). The combination of TP -models in terms of the state space and their representation in the Wigner distribution format allows one to evaluate, set and reassign the parameters of the internal structure of the object controlled (a separate feeder or feeding devices unit) in real time in order to achieve the effect of stabilizing the ingredients flow rate in a rated mode at pre-mixing stage. The transient modes are presented in the form of processes restoring the rated modes (the so-called reverse TP) . A procedure has been developed and described for the implementation of a modal control algorithm for the feeding process, including the technology of forced localization and relocalization of the object poles under non-stationary processes in the “Executive mechanism- FD ” system, using the example of a continuous-type feeder in a transient mode on load decrease (with a downward reverse transitional process). For this mode, the calculation of the non-stationary matrix of the modal controller is presented.

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