fuzzy applicationsmerrick cloete | sahithi jadav

this presentation

fuzzy applications

adaptive pricing

EDM

plug flow reactor

summary

adaptive pricing aims to dynamically change the price of a productit aims to adapt to market trends:

demand fluctuationsProduct variability

adaptive pricingneed to ensure products are adequately priced, not too expensive or cheap

adaptations need to avoid exploitation vulnerabilities, undesired product drops below profitable value at which point it is bought in bulk

avoid price hike loops whereby certain products reach unreasonably high prices

benefits

works well with slow to purchase products – things that don’t have a constant stream

of purchase order or don’t suit a bid system

handles large numbers of factors well without overly complex rules

Minimal data require compared to machine learning, defined by

developer – understand consumer base better

implementationProduct

Popularity

Shop Performance

User Recency

Market Penetration

Category Popularity

Time of week Performance

User Purchase Pate

Fuzzy Rule Set

discount

fuzzy inputsexplanation of inputs:

Product Popularity

Category Popularity

Shop Performance

fuzzy inputs cont.explanation of inputs:

Time of Week Performance

User Recency

User Purchase Rate

fuzzy inputs and outputexplanation of inputs and output:

Market Penetration

Discount

rule set

Fuzzy control system

-Fuzzy logic controllers in proportional integral and deferential forms

-Fuzzy logic control closed system

-Illustration

Control closed loop:- Handling imprecision and nonlinearity in complex

systems- Input & output variables are normalized

Logic Controllers in PI’s

-Two input variables, the error and the change of error

-Two input output FLC is derived from input variables and output variables.

PD like Fuzzy controller

-PD controller can be derived from Max-product inference technique

-Change in control variable according to the time plays a vital role

Plug flow tubular reactor:

-A simple exothermic kinetics takes place from A->B

-Seven fuzzy sets are derived for each variable e(t),ce(t),cu(t)

-Reduction in the coolant temperature decreases the output concentration, and inversely, the reasoning for

the construction of the fuzzy control rules.

PERFORMANCE ANALYSIS

Fuzzy reasoning in EDM

• EDM (electrical discharge machining) is a very complicated and stochastic process.

• Fuzzy reasoning system is used as classifier, sparks and arcs

• Electrical impedance is calculated using fuzzy sets.

EDM

summaryAdaptive Pricing

Plug Flow Reactor

EDM

referencesAdaptive Pricing with Fuzzy Logic http://blog.fuzzy.io/2015/03/25/adaptive-pricing-with-fuzzy-logic/

A CASE STUDY: A FUZZY CONTROL SYSTEM Chapter 15.4http://www.inf.ufpr.br/aurora/disciplinas/topicosia2/livros/search/FR.pdf

A Fuzzy Neural Control Systemhttp://onlinepresent.org/proceedings/vol31_2013/20.pdf

fuzzy applicationsmerrick cloete |sahithi jadav