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# Large Scale Systems - Science topic

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Let us discuss about the advantages, disadvantages, and use of powerful decomposition techniques like Bender's decomposition for large-scale optimization. I invite my esteemed colleagues and researchers to share important literature, ways of implementation, and potential application areas of decomposition algorithms, in this forum.
Dear R.K
You are right, we can't say no, because we don't know about new developments.
Probably, one of the reasons by which Bender's decomposition technique has not been applied to MCDM - and I share your opinion about its application - is because problems in MCDM are systems, and like that, they can't be partitioned, other than for study.
Your last paragraph resumes the same point, better than my sketchy explanation, so, we agree
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When we are dealing with Large-Scale Global Optimization (LSGO), what is the best-based approach: algorithms-based decomposition or algorithms-based Non decomposition?
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Mathematical programming is the best optimization tool with many years of strong theoretical background. Also, it is demonstrated that it can solve complex optimization problems on the scale of one million design variables, efficiently. Also, the methods are so reliable! Besides, there is mathematical proof for the existence of the solution and the globality of the optimum.
However, in some cases in which there are discontinuities in the objective function, there would be some problems due to non-differentiable problem. Some methods such as sub-gradients are proposed to solve such problems. However, I cannot find many papers in the state-of-the-art of engineering optimization of discontinuous optimization using mathematical programming. Engineers mostly use metaheuristics for such cases.
Can all problems with discontinuities be solved with mathematical programming? Is it easy to implement sub-gradients for large scale industrial problems? Do they work in non-convex problems?
A simple simple example of such a function is attached here.
Your ideas for dividing the region and using local optimizer are so nice!
Thanks a lot!
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Hello, I am interested in tracking the decrease in initiation events of different wildland fuel combustion.
Apart from the experimental procedures, is there any simulation software that can help me model the suppression of a burning object through water or water mixed with chemical additives?
I have mostly worked on accessing the combustion of coal and its causes through various sensors. However, CFD (computational fluid dynamics) have sufficient space for tracking the status of the fire.
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Can anyone please suggest appropriate scales for measuring university graduates' voluntary and involuntary unemployment, subjective and objective employability and visible and invisible underemployment?
Very helpful..thanks a lot, you both!
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Hello everyone,
Recent studies show that 70-90% of construction Megaprojects suffer cost and time overrun due to poor risk management, this underlines that the existing risk management and uncertainty management fail to manage these projects effectively. In your point of view, what is the main limitations and weaknesses associated with existing standard uncertainty management approaches in Megaprojects context?
Mustafa
Dear Dharmesh K. Oza.
Could you please clarify further how the weaknesses that you have mentioned above are related to the poor performance of uncertainty management? As I see some of them are just a normal risk by itself such as "Fluctuation in labour, supervisor , project manager and construction manager"
Regards,
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Scheduling Real Time tasks HPC for energy efficiency and data locality awareness
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I am searching for FSM algorithms (with exact or approximate search) that perform for General Graphs Input . Thank you
You can check out two below papers. Hope it helps.
1. G-Tries: a data structure for storing and finding subgraphs
2. LC-mine: a framework for frequent subgraph mining with local consistency techniques
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I would like to screen any approaches in which researchers modelled energy efficiency in energy system models (ESM) since I am interested to integrated the feature of energy efficiency into an equilibrium model with multiple fuels. Energy efficiency measures may take place on the demand side as well as on the supply side.
Thanks a lot for any hints concerning this issue!