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In [[computer science]], '''Imperialist Competitive Algorithm (ICA)'''<ref name=ica_en_2007_cnf_atashpaz_ica_ica/> is a computational method that is used to solve [[optimization problem]]s of different types. Like most of the methods in the area of [[evolutionary computation]], ICA does not need the gradient of the function in its optimization process.
Here are some important things that you need to remember to get a nice looking bathroom after remodeling. <br><br>


From a specific point of view, ICA can be thought of as the social counterpart of [[genetic algorithms]] (GAs). ICA is the mathematical model and the computer simulation of human [[social evolution]], while GAs are based on the [[biological evolution]] of species.
First is color theme<br><br>The first thing that should be the part of your bathroom remodeling is the color theme. Everything else will then go according to the color theme you have chosen. Planning the color theme means knowing exactly what color you want for each item. You will need to know very clearly what color you want for the walls. You will need to have the clear idea of the color of the bathroom accessories including faucets, showerheads, toilet seat, bathtubs, worktop, floor, mats, sink and everything else that you want there. Only when you have decided the color theme you will be able to make the right purchases. The best idea is to spend some time visualizing about the colors. Once you have some idea, you can write it down on a notepad. If you are not sure, you can always contact Aqua Bathrooms for consultation.<br><br><br>Second is your budget<br><br>It is very difficult to say whether budget comes first or color. Probably you can say either can come first. They may go hand in hand. Regardless your budget, you can choose any color theme. Regardless the color theme, your budget remains fixed. Planning the budget out is very important. There are many luxury bathroom accessories that you may get attracted towards. If you do not have a budget in mind, you will buy the items randomly. Later you will realize that you have overspent. To avoid any such situation, get the budget in place and then plan things accordingly. Aqua Bathrooms can suggest you the best bathroom remodeling ideas based on your budget.<br><br>Make a list of all the things you want<br><br>Check your bathroom thoroughly and figure out what are the things that you need. If you want a complete makeover  [http://tinyurl.com/kecvhhb discount ugg boots] of the bathroom then you will need to buy  [http://tinyurl.com/kecvhhb http://tinyurl.com/kecvhhb] everything brand new. If you just want to give it a touch up then some of the things will just require refinishing and only few will need replacement. Again this depends upon your budget. A complete makeover of the bathroom with new accessories will cost you a lot. [http://tinyurl.com/kecvhhb cheap ugg boots] However, refinishing certain items will save you money and time both. If you have the luxury of time and money, makeover will be a good choice. You can indeed ask a consultant from Aqua Bathrooms to [http://www.google.com/search?q=examine&btnI=lucky examine] your bathroom and determine whether it requires a [http://tinyurl.com/kecvhhb discount ugg boots] major makeover or just a touch up. <br><br><br>Start the shopping<br><br>Once you know what you want, [http://tinyurl.com/kecvhhb discount ugg boots] you can start the shopping for your bathroom. If you have been given good consultation from someone like Aqua Bathrooms, you will have no problem with the shopping. You will know what to buy and where to buy it from. A good idea will be to look for discounts on the bathroom accessories. There are many online vendors that offer good discounts. You don�t always need to buy branded products. There are many unbranded products which are equally good. You just need to find  [http://tinyurl.com/kecvhhb ugg boots sale] them.<br><br>For more information about 1200 shower door 900mm shower door, visit our website.
 
== Algorithm ==
[[File:Imperialist-competitive-algorithm-flowchart.jpg|thumb|420px|Figure 1: Flowchart of Imperialist Competitive Algorithm (ICA)]]
Figure 1 shows the flowchart of the Imperialist Competitive Algorithm. This algorithm starts by generating a set of candidate random solutions in the search space of the optimization problem. The generated random points are called the initial ''Countries''. Countries in this algorithm are the counterpart of ''Chromosome''s in GAs and ''Particle''s in [[Particle Swarm Optimization]] (PSO) and it is an array of values of a candidate solution of optimization problem. The [[Loss function|cost function]] of the optimization problem determines the power of each country. Based on their power, some of the best initial countries (the countries with the least cost function value), become ''Imperialists'' and start taking control of other countries (called ''colonies'') and form the initial ''Empires''.<ref name=ica_en_2007_cnf_atashpaz_ica_ica/>
 
Two main operators of this algorithm are ''Assimilation'' and ''Revolution''. Assimilation makes the colonies of each empire get closer to the imperialist state in the space of socio-political characteristics (optimization search space). Revolution brings about sudden random changes in the position of some of the countries in the search space. During assimilation and revolution a colony might reach a better position and has the chance to take the control of the entire empire and replace the current imperialist state of the empire.<ref name=ica_en_2010_jnl_nazari_integrated_product_mix_outsourcing/>
 
''Imperialistic Competition'' is another part of this algorithm. All the empires try to win this game and take possession of colonies of other empires. In each step of the algorithm, based on their power, all the empires have a chance to take control of one or more of the colonies of the weakest empire.<ref name=ica_en_2007_cnf_atashpaz_ica_ica/>
 
Algorithm continues with the mentioned steps (Assimilation, Revolution, Competition) until a stop condition is satisfied.
 
== Pseudocode ==
The above steps can be summarized as the below [[pseudocode]].<ref name=ica_en_2010_jnl_nazari_integrated_product_mix_outsourcing/>
0) Define objective function: <math>f(\mathbf{x}), \quad \mathbf{x}=(x_1,x_2,\dots,x_d); \, </math>
1) Initialization of the algorithm. Generate some random solution in the search space and create initial empires.
    2) Assimilation: Colonies move towards imperialist states in different in directions.
    3) Revolution: Random changes occur in the characteristics of some countries.  
    4) Position exchange between a colony and Imperialist. A colony with a better position than the imperialist,  
        has the chance to take the control of empire by replacing the existing imperialist.
    5) Imperialistic competition: All imperialists compete to take possession of colonies of each other.
    6) Eliminate the powerless empires. Weak empires lose their power gradually and they will finally be eliminated.
    7) If the stop condition is satisfied, stop, if not go to 2.
8) End
 
== Variants ==
Like for [[Particle Swarm Optimization|PSO]], the first version of ICA was proposed for solving continuous optimization problems. Then in other works different variants of ICA were proposed for solving both discrete and continuous problems. For example Chaotic ICA is proposed by Duan, etal.<ref name=ica_en_2009_jnl_duan_template_matching_chaotic_ica/> and also a version of this algorithm for handling constrained optimization problems is proposed by Zhang, etal.<ref name=ica_en_2009_cnf_zhang_improved_ica_constrained_optimization/>
 
== Applications ==
ICA is used to solve different optimization problems in various areas of engineering and science. The following are some of the applications of this algorithm.
 
* Designing controller for industrial systems<ref name=ica_en_2008_en_conf_rajabioun_decentralized_pid_controller_design_mimo_evaporator/><ref name=ica_en_2008_jnl_atashpaz_ijicc_pid_mimo_distillation_column_process/><ref name=ica_en_2008_jnl_atashpaz_ijicc_pid_mimo_distillation_column_process/><ref name=ica_en_2007_cnf_atashpaz_optimal_pid_controller_isfs2007/><ref name=ica_en_2008_en_bchtr_rajabioun_nash_equilibrium_point_achievement/><ref name=ica_en_2009_jnl_atashpaz_decentralized_pid_controller_optimal_shrinkage_gershgorin_bands/>
* Designing Intelligent Recommender Systems<ref name=ica_en_2008_cnf_sepehrirad_recommender_systems/>
* Solving optimization problems in communication systems.<ref name=ica_en_2009_jnl_khabbazi_minimum_bit_error_rate_beamforming/><ref name=ica_2010_en_jnl_Alikhani_Evaluation_of_Image_Segmentation_Methods/><ref name=ica_2010_en_cnf_Sayadnavard_Wireless_sensor_network_localization/>
* Solving scheduling and production management problems<ref name=ica_en_2010_jnl_nazari_integrated_product_mix_outsourcing/><ref name=ica_en_2009_jnl_jolai_pareto_simulated_annealing_offline_scheduling_problem_with_rejection/><ref name=ica_en_2010_jnl_shokrollahpour_bi_criteria_flowshop/><ref name=ica_2010_en_jnl_Forouharfard_schedule_cross_docking_systems/><ref name=ica_2010_en_jnl_Karimi_scheduling_flexible_flow_shops_ica_electromagnetic/><ref name=ica_2010_en_jnl_Bagher_Balancing_of_stochastic_U_Type_assembly_lines/><ref name=ica_2010_en_jnl_Sarayloo_ica_Dynamic_Cell_Formation/>
* Training and analysis of Artificial Neural Networks<ref name=ica_en_2008_jnl_oskouyi_material_properties_characterization_sharp_indentation_test/><ref name=ica_en_2009_cnf_mahmoudi_ann_weights_optimization/>
* Nash Equilibrium Point Achievement<ref name=ica_en_2008_en_bchtr_rajabioun_nash_equilibrium_point_achievement/>
* Design and thermodynamic optimization of plate-fin heat exchangers<ref name=ica_moslem_2011/>
* and so on<ref name=ica_en_2010_jnl_lucas_linear_induction_motor/><ref name=ica_2010_en_jnl_omid_phev/><ref name=ica_2010_en_jnl_niknam_k_means_clustering/><ref name=ica_2010_en_jnl_mozafari_thin_interphase/>
 
== References ==
{{Reflist|refs=
 
<ref name=ica_moslem_2011>
{{cite conference
|last1= Yousefi
|first1= Moslem
|last2= Mohammadi
|first2= Hossein
|title= Second law based optimization of a plate fin heat exchanger using Imperialist Competitive Algorithm
|booktitle= International Journal of the Physical Sciences
|year= 2011
|volume= 6
|pages= 4749–4759
}}
</ref>
 
<ref name=ica_en_2007_cnf_atashpaz_ica_ica>
{{cite conference
|last1= Atashpaz-Gargari
|first1= E.
|last2= Lucas
|first2= C
|title= Imperialist Competitive Algorithm: An algorithm for optimization inspired by imperialistic competition
|booktitle= IEEE Congress on Evolutionary Computation
|year= 2007
|volume= 7
|pages= 4661–4666
}}
</ref>
 
<ref name= ica_en_2009_jnl_duan_template_matching_chaotic_ica>
{{cite journal
|last1= Duan
|first1=H.
|last2=Xu
|first2=C.
|last3=Liu
|first3=S.
|last4=Shao
|first4=S.
|title=Template matching using chaotic imperialist competitive algorithm
|journal=Pattern Recognition Letters
|year=2009
|volume=39
|issue=6
|pages=1362–1381
}}
</ref>
 
<ref name=ica_en_2009_cnf_zhang_improved_ica_constrained_optimization>
{{cite conference
|last1=Zhang
|first1=Yang
|last2=Wang
|first2=Yong
|last3=Peng
|first3=Cheng
|title=Improved Imperialist Competitive Algorithm for Constrained Optimization
|booktitle=Computer Science-Technology and Applications, IFCSTA
|year=2009
}}
</ref>
 
<ref name=ica_en_2008_en_conf_rajabioun_decentralized_pid_controller_design_mimo_evaporator>
{{cite conference
|last1=Rajabioun
|first1=R.
|last2=Hashemzadeh
|first2=F.
|last3=Atashpaz-Gargari
|first3=E.
|last4=Mesgari
|first4=B.
|last5=Rajaei Salmasi
|first5=F.
|title=Identification of a MIMO evaporator and its decentralized PID controller tuning using Colonial Competitive Algorithm
|booktitle=In the proceeding of IFAC World Congress, Seoul, Korea
|year=2008
|pages=9952–9957
}}
</ref>
 
<ref name=ica_en_2008_jnl_atashpaz_ijicc_pid_mimo_distillation_column_process>
{{cite journal
|last1= Atashpaz-Gargari
|first1= E.
|last2= Hashemzadeh
|first2= F.
|last3= Rajabioun
|first3= R.
|last4= Lucas
|first4= C.
|title= Colonial competitive algorithm: A novel approach for PID controller design in MIMO distillation column process
|journal= International Journal of Intelligent Computing and Cybernetics
|year= 2008
|volume= 1
|issue= 3
|pages= 337–355
}}
</ref>
 
<ref name=ica_en_2008_jnl_atashpaz_ijicc_pid_mimo_distillation_column_process>
{{cite journal
|last1= Gargari
|first1= E.
|last2= Hashemzadeh
|first2= F.
|last3= Rajabioun
|first3= R.
|last4= Lucas
|first4= C.
|title= Colonial competitive algorithm: A novel approach for PID controller design in MIMO distillation column process
|journal= International Journal of Intelligent Computing and Cybernetics
|year= 2008
|volume=  1
|pages= 337–355
}}
</ref>
 
<ref name=ica_en_2007_cnf_atashpaz_optimal_pid_controller_isfs2007>
{{cite conference
|last1= Atashpaz-Gargari
|first1= E.
|last2= Lucas
|first2= C.
|title= Designing an optimal PID controller using Colonial Competitive Algorithm
|booktitle= Proceeding of First Iranian Joint Congress on Intelligent and Fuzzy Systems
|year= 2007
}}
</ref>
 
<ref name=ica_en_2008_en_bchtr_rajabioun_nash_equilibrium_point_achievement>
{{cite conference
|last1= Rajabioun
|first1= R.
|last2= Atashpaz-Gargari
|first2= E.
|last3= Lucas
|first3= C.
|title= Colonial competitive algorithm as a tool for Nash equilibrium point achievement
|booktitle= Computational Science and Its Applications–ICCSA
|year= 2008
|pages= 680–695
}}
</ref>
 
<ref name=ica_en_2009_jnl_atashpaz_decentralized_pid_controller_optimal_shrinkage_gershgorin_bands>
{{cite journal
|last1= Atashpaz-Gargari
|first1= E.
|last2= Rajabioun
|first2= R.
|last3= Hashemzadeh
|first3= F.
|last4= R. Salmasi
|first4= F.
|title= A Decentralized PID controller based on Optimal Shrinkage of Gershgorin Bands and PID tuning Using Colonial Competitive Algorithm
|journal= International Journal of Innovative Computing, Information and Control
|year= 2009
|volume= 5
|issue=  10(A)
}}
</ref>
 
<ref name=ica_en_2008_cnf_sepehrirad_recommender_systems>
{{cite conference
|last1= Sepehri Rad
|first1= H.
|last2= Lucas
|first2= C.
|title= Application of Imperialistic Competition Algorithm in recommender systems
|booktitle= In 13th Int'l CSI Computer Conference (CSICC'08)
|year= 2008
}}
</ref>
 
<ref name=ica_en_2009_jnl_khabbazi_minimum_bit_error_rate_beamforming>
{{cite journal
|last1= Khabbazi
|first1= Arash
|last2= Atashpaz-Gargari
|first2= Esmaeil
|last3= Lucas
|first3= Caro
|title= Imperialist competitive algorithm for minimum bit error rate beamforming
|journal= International Journal of Bio-Inspired Computation
|year= 2009
|volume= 1
|issue= 1-2
|pages= 125–133
}}
</ref>
 
<ref name=ica_2010_en_jnl_Alikhani_Evaluation_of_Image_Segmentation_Methods>
{{cite journal
|last1= Alikhani koupaei
|first1= Javad
|last2= Abdechiri
|first2= Marjan
|title= An Optimization Problem for Evaluation of Image Segmentation Methods
|journal= International Journal of Computer and Network Security
|year= 2010
|volume= 2
|issue= 6
}}
</ref>
 
<ref name=ica_2010_en_cnf_Sayadnavard_Wireless_sensor_network_localization>
{{cite conference
|last1= H. Sayadnavard
|first1= Monireh
|last2= T. Haghighat
|first2= Abolfazl
|last3= Abdechiri
|first3= Marjan
|title= Wireless sensor network localization using Imperialist Competitive Algorithm
|booktitle= 3rd IEEE International Conference on Computer Science and Information Technology
|year= 2010
}}
</ref>
 
<ref name=ica_en_2009_jnl_jolai_pareto_simulated_annealing_offline_scheduling_problem_with_rejection >
{{cite journal
|last1= Jolai
|first1= F.
|last2= Sangari
|first2= M.
|last3= Babaie
|first3= M.
|title= Pareto simulated annealing and colonial competitive algorithm to solve an offline scheduling problem with rejection
|journal= Journal of Engineering Manufacture
|year= 2010
|volume= 224
|issue= 7
|pages= 1119–1131
}}
</ref>
 
<ref name=ica_en_2010_jnl_shokrollahpour_bi_criteria_flowshop>
{{cite journal
|last1= Shokrollahpour
|first1= E.
|last2= Zandieh
|first2= M.
|last3= Dorri
|first3= Behrouz
|title= A novel imperialist competitive algorithm for bi-criteria scheduling of the assembly flowshop problem
|journal= International Journal of Production Research
|year= 2010
}}
</ref>
 
<ref name=ica_en_2010_jnl_nazari_integrated_product_mix_outsourcing>
{{cite journal
|last1= Nazari-Shirkouhi
|first1= S.
|last2= Eivazy
|first2= H.
|last3= Ghodsi
|first3= R.
|last4= Rezaie
|first4= K.
|last5= Atashpaz-Gargari
|first5= E.
|title= Solving the Integrated Product Mix-Outsourcing Problem by a Novel Meta-Heuristic Algorithm: Imperialist Competitive Algorithm
|journal= Expert Systems with Applications
|year= 2010
|volume= 37
|issue= 12
|pages= 7615–7626
}}
</ref>
 
<ref name=ica_2010_en_jnl_Forouharfard_schedule_cross_docking_systems>
{{cite journal
|last1= Forouharfard
|first1= S.
|last2= Zandieh
|first2= M.
|title= An imperialist competitive algorithm to schedule of receiving and shipping trucks in cross-docking systems
|journal= International Journal of Advanced Manufacturing Technology
|year= 2010
}}
</ref>
 
<ref name=ica_2010_en_jnl_Karimi_scheduling_flexible_flow_shops_ica_electromagnetic>
{{cite journal
|last1= Karimi
|first1= N.
|last2= Zandieh
|first2= M.
|title= Group scheduling in flexible flow shops: A hybridised approach of imperialist competitive algorithm and electromagnetic-like mechanism
|journal= International Journal of Production Research
|year= 2010
|volume=
|issue=
|pages=
}}
</ref>
 
<ref name=ica_2010_en_jnl_Bagher_Balancing_of_stochastic_U_Type_assembly_lines>
{{cite journal
|last1= Bagher
|first1= M.
|last2= Zandieh
|first2= M.
|last3= Farsijani
|first3= H.
|title= Balancing of stochastic U-type assembly lines: an imperialist competitive algorithm
|journal= International Journal of Advanced Manufacturing Technology
|year= 2010
|volume=
|issue=
|pages=
}}
</ref>
 
<ref name=ica_2010_en_jnl_Sarayloo_ica_Dynamic_Cell_Formation>
{{cite journal
|last1= Sarayloo
|first1= Fatemeh
|last2= Tavakkoli-Moghaddam
|first2= Reza
|title= Imperialistic Competitive Algorithm for Solving a Dynamic Cell Formation Problem with Production Planning
|journal= Advanced Intelligent Computing Theories and Applications, Lecture Notes in Computer Science
|year= 2010
|volume= 6215
|issue=
|pages= 266–276
}}
</ref>
 
<ref name=ica_en_2008_jnl_oskouyi_material_properties_characterization_sharp_indentation_test>
{{cite journal
|last1= Biabangard-Oskouyi
|first1= A.
|last2= Atashpaz-Gargari
|first2= E.
|last3= Soltani
|first3= N.
|last4= Lucas
|first4= C.
|title= Application of Imperialist Competitive Algorithm for Material Properties Characterization from Sharp Indentation Test
|journal= Int J Eng Simul
|year= 2009
|volume= 10
|issue= 1
|pages=
}}
</ref>
 
<ref name=ica_en_2009_cnf_mahmoudi_ann_weights_optimization>
{{cite conference
|last1= T.
|first1= Maryam
|last2= F.
|first2= Nafiseh
|last3= L.
|first3= Caro
|last4= T.
|first4= Fattaneh
|title= Artificial Neural Network Weights Optimization based on Imperialist Competitive Algorithm
|booktitle= Seventh International Conference on Computer Science and Information Technologies
|year= 2009
}}
</ref>
 
<ref name=ica_en_2008_en_bchtr_rajabioun_nash_equilibrium_point_achievement>
{{cite journal
|last1= Rajabioun
|first1= R.
|last2= Atashpaz-Gargari
|first2= E.
|last3= Lucas
|first3= C.
|title= Colonial Competitive Algorithm as a Tool for Nash Equilibrium Point Achievement
|journal= Lecture Notes in Computer Science (LNCS)
|year= 2008
|pages= 680–695
}}
</ref>
 
<ref name=ica_en_2010_jnl_lucas_linear_induction_motor>
{{cite journal
|last1= Lucas
|first1= C.
|last2= Nasiri-Gheidari
|first2= Z.
|last3= Tootoonchian
|first3= F.
|title= Application of an imperialist competitive algorithm to the design of a linear induction motor
|journal= Energy Conversion and Management
|year= 2010
|volume= 51
|issue= 7
|pages= 1407–1411
}}
</ref>
 
<ref name=ica_2010_en_jnl_omid_phev>
{{cite journal
|last1= Movahhedi
|first1= Omid
|last2= R. Salmasi
|first2= Farzad
|title= Optimal Design of Propulsion System with Adaptive Fuzzy Controller for a PHEV Based on Non-dominated Sorting Genetic and Colonial Competitive Algorithms
|journal= International Review of Automatic Control
|year= 2009
}}
</ref>
 
<ref name=ica_2010_en_jnl_niknam_k_means_clustering>
{{cite journal
|last1= Niknam
|first1= Taher
|last2= Taherian Fard
|first2= Elahe
|last3= Pourjafarian
|first3= Narges
|last4= Rousta
|first4= Alireza
|title= An efficient hybrid algorithm based on modified imperialist competitive algorithm and K-means for data clustering
|journal= Engineering Applications of Artificial Intelligence
|year= 2010
}}
</ref>
 
<ref name=ica_2010_en_jnl_mozafari_thin_interphase>
{{cite journal
|last1= Mozafari
|first1= Hamid
|last2= Abdi
|first2= Behzad
|last3= Ayob
|first3= Amran
|title= Optimization of Transmission Conditions for Thin Interphase Layer Based on Imperialist Competitive Algorithm
|journal= International Journal on Computer Science and Engineering
|year= 2010
|volume= 2
|issue= 7
|pages= 2486–2490
}}
</ref>
}}
 
[[Category:Optimization algorithms and methods]]

Revision as of 21:53, 17 February 2014

Here are some important things that you need to remember to get a nice looking bathroom after remodeling.

First is color theme

The first thing that should be the part of your bathroom remodeling is the color theme. Everything else will then go according to the color theme you have chosen. Planning the color theme means knowing exactly what color you want for each item. You will need to know very clearly what color you want for the walls. You will need to have the clear idea of the color of the bathroom accessories including faucets, showerheads, toilet seat, bathtubs, worktop, floor, mats, sink and everything else that you want there. Only when you have decided the color theme you will be able to make the right purchases. The best idea is to spend some time visualizing about the colors. Once you have some idea, you can write it down on a notepad. If you are not sure, you can always contact Aqua Bathrooms for consultation.


Second is your budget

It is very difficult to say whether budget comes first or color. Probably you can say either can come first. They may go hand in hand. Regardless your budget, you can choose any color theme. Regardless the color theme, your budget remains fixed. Planning the budget out is very important. There are many luxury bathroom accessories that you may get attracted towards. If you do not have a budget in mind, you will buy the items randomly. Later you will realize that you have overspent. To avoid any such situation, get the budget in place and then plan things accordingly. Aqua Bathrooms can suggest you the best bathroom remodeling ideas based on your budget.

Make a list of all the things you want

Check your bathroom thoroughly and figure out what are the things that you need. If you want a complete makeover discount ugg boots of the bathroom then you will need to buy http://tinyurl.com/kecvhhb everything brand new. If you just want to give it a touch up then some of the things will just require refinishing and only few will need replacement. Again this depends upon your budget. A complete makeover of the bathroom with new accessories will cost you a lot. cheap ugg boots However, refinishing certain items will save you money and time both. If you have the luxury of time and money, makeover will be a good choice. You can indeed ask a consultant from Aqua Bathrooms to examine your bathroom and determine whether it requires a discount ugg boots major makeover or just a touch up.


Start the shopping

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For more information about 1200 shower door 900mm shower door, visit our website.