scholarly journals SYNTHESIS OF FUNCTIONAL MODELS FROM USE CASES USING THE SYSTEM STATE FLOW DIAGRAM: A NESTED SYSTEMS APPROACH

2018 ◽  
Author(s):  
Felician Campean ◽  
Unal Yildirim ◽  
Ed Henshall
Keyword(s):  
Systems Approach ◽  
Use Cases ◽  
Flow Diagram ◽  
System State ◽  
State Flow ◽  
Functional Models

scholarly journals Function modeling using the system state flow diagram

2017 ◽  
Vol 31 (4) ◽  
pp. 413-435 ◽  
Author(s):  
Unal Yildirim ◽  
Felician Campean ◽  
Huw Williams
Keyword(s):  
Case Studies ◽  
Critical Evaluation ◽  
Decomposition Analysis ◽  
Flow Diagram ◽  
System State ◽  
Modeling Framework ◽  
Industrial Case Study ◽  
Modeling And Analysis ◽  
State Flow ◽  
Function Decomposition

AbstractThis paper introduces a rigorous framework for function modeling of complex multidisciplinary systems based on the system state flow diagram (SSFD). The work addresses the need for a consistent methodology to support solution-neutral function-based system decomposition analysis, facilitating the design, modeling, and analysis of complex systems architectures. A rigorous basis for the SSFD is established by defining conventions for states and function definitions and a representation scheme, underpinned by a critical review of existing literature. A set of heuristics are introduced to support the function decomposition analysis and to facilitate the deployment of the methodology with strong practitioner guidelines. The SSFD heuristics extend the existing framework of Otto and Wood (2001) by introducing a conditional fork node heuristic, to facilitate analysis and aggregation of function models across multiple modes of operation of the system. The empirical validation of the SSFD function modeling framework is discussed in relation to its application to two case studies: a benchmark problem (glue gun) set for the engineering design community; and an industrial case study of an electric vehicle powertrain. Based on the evidence from the two case studies presented in the paper, a critical evaluation of the SSFD function modeling methodology is discussed based on the function benchmarking framework established by Summers et al. (2013), considering the representation, modeling, cognitive, and reasoning characteristics. The significance of this paper is that it establishes a rigorous reference framework for the SSFD function representation and a consistent methodology to guide the practitioner with its deployment, facilitating its impact to industrial practice.

Using system dynamics to evaluate renewable electricity development in Malaysia

Kybernetes ◽  
2014 ◽  
Vol 43 (1) ◽  
pp. 24-39 ◽  
Author(s):  
Salman Ahmad ◽  
Razman bin Mat Tahar
Keyword(s):  
System Dynamics ◽  
Fossil Fuels ◽  
Systems Approach ◽  
Capacity Expansion ◽  
Assessment Model ◽  
Flow Diagram ◽  
Content Type ◽  
The Government ◽  
Policy Targets

Purpose – The purpose of this paper is to provide an assessment of Malaysia's renewable capacity target. Malaysia relies heavily on fossil fuels for electricity generation. To diversify the fuel-mix, a technology-specific target has been set by the government in 2010. Considering the complexity in generation expansion, there is a dire need for an assessment model that can evaluate policy in a feedback fashion. The study also aims to expand policy evaluation literature in electricity domain by taking a dynamic systems approach. Design/methodology/approach – System dynamics modelling and simulation approach is used in this study. The model variables, selected from literature, are constituted into casual loop diagram. Later, a stock and flow diagram is developed by integrating planning, construction, operation, and decision making sub-models. The dynamic interactions between the sub-sectors are analysed based on the short-, medium- and long-term policy targets. Findings – Annual capacity constructions fail to achieve short-, medium- and long-term targets. However, the difference in operational capacity and medium- and long-term target are small. In terms of technology, solar photovoltaic (PV) attains the highest level of capacity followed by biomass. Research limitations/implications – While financial calculations are crucial for capacity expansion decisions, currently they are not being modelled; this study primarily focuses on system delays and exogenous components only. Practical implications – A useful model that offers regulators and investors insights on system characteristics and policy targets simultaneously. Originality/value – This paper provides a model for evaluating policy for renewable capacity expansion development in a dynamic context, for Malaysia.

How close I.R. Prigogine, н. наken and S.P. Kurdumov approached to understanding of inevitability of TCS

10.12737/6722 ◽  
2014 ◽  
Vol 3 (3) ◽  
pp. 39-46
Author(s):  
Еськов ◽  
V. Eskov
Keyword(s):  
Systems Approach ◽  
Cellular Level ◽  
Living Systems ◽  
Self Organization ◽  
System State ◽  
The Third ◽  
Physical Chemical ◽  
Novel Approach ◽  
Life Phenomena ◽  
Living Objects

Advances in molecular biology and biophysics (at molecular-cellular level) do not contribute to understanding of life phenomena. Achievements of synergetics (H. Haken) and complexity theory (I. Prigogine) have intensified differences between physical-chemical understandings of life and systemic understandings. In addition to that, the systems approach provides the understanding of effects of living objects and especially its more organized and evolving part – human and humanity. Human-scaled systems possess the unique property – continuous and chaotic movement of many components of a system state vector x= x(t). Taking this property into consideration causes the denial of any known types of stationary nodes (for example, dx/dt=0) and requires reconsideration of concept of chaos. A novel approach for understanding of living systems (as the third paradigm of natural science) and novel methods of studying of living systems (as theory of chaos and self-organization) are proposed by the third paradigm and theory of chaos and self-organization.

Mode Switchover Strategy for Multi-port Energy Router Based on State Flow Diagram

2021 ◽  
Author(s):  
Jingwen Zheng ◽  
Zhiguo Wei ◽  
Zaixun Ling ◽  
Yu Guo ◽  
Ping Xiong ◽  
...  
Keyword(s):  
Flow Diagram ◽  
State Flow

Guidelines for Textile Industry Noise Control

1974 ◽  
Vol 96 (1) ◽  
pp. 241-246
Author(s):  
J. R. Bailey ◽  
C. M. Brown
Keyword(s):  
Textile Industry ◽  
Occupational Safety ◽  
Noise Exposure ◽  
Noise Control ◽  
Systems Approach ◽  
Economic Feasibility ◽  
Flow Diagram ◽  
Road Map ◽  
Safety And Health ◽  
Final Consideration

A systems approach is developed for defining compliance with the noise criteria of the Occupational Safety and Health Act of 1970. The result is a flow diagram which can be used as a “road map” for determining progress toward compliance. A flow diagram is also developed as a guideline for evaluating the feasibility of engineering noise control. General suggestions are made for controlling the noise produced by air sources, oscillating bodies, frictional sources, impact, and gears. Absorption, enclosures, and barriers have also been considered as means of interrupting the path between the source and the receiver. Noise exposure has been included as an important factor with economic feasibility as a final consideration in the flow diagram.

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

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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