Optimization Algorithms (GA-PSO-GSA-ACO...)

Top PDF Optimization Algorithms (GA-PSO-GSA-ACO...):

Different Aspects of Evolutionary Algorithms, Multi-Objective Optimization Algorithms and Application Domain

Different Aspects of Evolutionary Algorithms, Multi-Objective Optimization Algorithms and Application Domain

This paper explores the information from various resources like scholarly works, conference presentation and personal conversation. Finally, the area of Multi-Objective Optimization Problems is extremely complex and mathematically difficult, with many under-researched areas and outstanding problems. The application of Multi- Objective Optimization is challenging and increasing day by day so finally, with regard to future perspective, it requires more research, design and development on Multi-Objective Optimization Algorithms.

6 Read more

SGDLibrary: A MATLAB library for stochastic optimization algorithms

SGDLibrary: A MATLAB library for stochastic optimization algorithms

in the field of machine learning (ML). One promising approach for large-scale data is to use a stochastic optimization algorithm to solve the problem. SGDLibrary is a readable, flexible and extensible pure-MATLAB library of a collection of stochastic optimization algorithms. The purpose of the library is to provide researchers and implementers a comprehensive evaluation environment for the use of these algorithms on various ML problems.

5 Read more

Some recent developments in nonlinear optimization algorithms

Some recent developments in nonlinear optimization algorithms

In order to compute or approach a local solution of problem (1), nonlinear optimization algorithms produce a sequence of iterates, { x k } say, that (hopefully) converges to such a solution, x ∗ say. As far as unconstrained optimization is concerned (i.e., when the feasible set is IR n ), important progress has been made since a while now in the solution of these problems, especially in the way to guarantee (both in theory and in practice) global convergence of the iterative process to a solution, i.e., convergence of the iterative process from any starting point. We will present in this paper the main ideas of the two major globalization techniques, called line-search method and trust-region method.
Show more

24 Read more

A Survey on Optimization Algorithms for Optimizing the Numerical Functions

A Survey on Optimization Algorithms for Optimizing the Numerical Functions

During their return trip, it releases the pheromone hormone to guide their search. ABC is introduced by Dervis Karaboga in the year 2005, which is mainly motivated by the searching behavior of bees. ABC is also known as population-based search procedure. Also, the original ABC algorithm combines both local search methods and global search methods that are being performed by the employed and onlooker bees for balancing the exploration and exploitation capacity. GA constitutes the natural selection and genetic recombination. GA chooses the solutions randomly from the population and then applies the genetic operators such as mutation and crossover for creating the new offspring. GA uses the historical information for investigating on new search areas in order to improve the performance. The main advantage of GA is that it performs global search. BA is an optimization technique which is inspired by the searching behaviour of bees to find the best nearly optimal solution. SA is mainly used with the GA where mutation operator is used. SA starts with the high rate of mutation operator and probably decreases the rate. TS performs same as SA where SA produces only a single mutated solution but TS produces many mutated solutions and selects the one which is having the lowest energy. Hill Climbing is a mathematical technique which is mainly for local search. The whole optimization algorithms perform until the termination criterion satisfies.
Show more

6 Read more

Comparative Analysis of Clustering by using
          Optimization Algorithms

Comparative Analysis of Clustering by using Optimization Algorithms

Abstract — Data-Mining (DM) has become one of the most valuable tools for extracting and manipulating data and for establishing patterns in order to produce useful information for decision-making. Clustering is a data mining technique for finding important patterns in unorganized and huge data collections. This likelihood approach of clustering technique is quite often used by many researchers for classifications due to its’ being simple and easy to implement. In this work, we first use the Expectation-Maximization (EM) algorithm for sampling on the medical data obtained from Pima Indian Diabetes (PID) data set. This work is also based on comparative study of GA, ACO & PSO based Data Clustering methods. To Compare the results we use different metrics such as weighted arithmetic mean, standard deviation, Normalized absolute error & Precision value that measured the performance to compare and analyze the results. The results prove that the accuracy generated by using particle swarm optimization is more as compare to other optimization algorithms named as genetic algorithm and ant colony optimization algorithm in classification process. So, this work shows that the particle swarm optimization techniques results as the best optimization technique to handle the process.
Show more

6 Read more

Survey : Cryptography Optimization Algorithms

Survey : Cryptography Optimization Algorithms

The survey has been investigated over many research papers based on optimization algorithm applied in the cryptographic algorithms. Each authors proposed some of the optimization algorithm is used to optimize the key values in particular cryptographic algorithm. Each method is unique in its own way, which have their own advantages and disadvantages. Based on existing research works the optimization algorithms are used to optimize the key values in complex cryptographic methods like ECC, RSA.etc still remain significantly challenging tasks for the research community.
Show more

9 Read more

Convergence Rates of Efficient Global Optimization Algorithms

Convergence Rates of Efficient Global Optimization Algorithms

Finally, we should also ask how to choose the smoothness parameter ν (or the equivalent pa- rameter in similar algorithms). Van der Vaart and van Zanten (2009) show that Bayesian Gaussian- process models can, in some contexts, automatically adapt to the smoothness of an unknown func- tion f . Their technique requires, however, that the estimated length-scales ˆ θ n to tend to 0, posing

26 Read more

Optimization: Algorithms and Applications

Optimization: Algorithms and Applications

SPIDAL has or will have support for model fitting at several levels of abstractions: – Low-level: grid search, Viterbi, Forward-Backward, Markov Chain Monte Carlo MCMC algorithms, determ[r]

31 Read more

Benchmarking evolutionary multiobjective optimization algorithms

Benchmarking evolutionary multiobjective optimization algorithms

We have developed a framework to systematically compare evolutionary multiobjective opti- mization algorithms under different settings. We then introduced methods to combine these rankings from different benchmark scenarios into a consensus ranking to choose the ‘best’ al- gorithm. Here, we saw that there is no such thing as a universally best consensus and therefore there can be no best algorithm for everyone. To illustrate this we analyzed a competition dataset from the CEC 2007 EMOA competition.

26 Read more

Optimization Algorithms for the Minimum-Cost Satisability Problem.

Optimization Algorithms for the Minimum-Cost Satisability Problem.

lem or not: reductions can reduce the size of the formula significantly but are usually useless for non-covering problems. When no more reductions can be applied, a branching variable is chosen and set to either 1 or 0 to generate the two sub search-trees of the current node. The search backtracks when either the upper-bound meets the lower-bound or a clause becomes unsatisfied. In both situations, some MinCostSat solvers [41, 42] utilize the conflict diagnosis and non-chronological backtracking techniques introduced in SAT solvers [15, 54, 16]. The lower-bounding techniques used in these algorithms are mostly based on maximum independent set of rows [28, 30, 40, 41] or linear-programming relax- ation [29]. For upper bounding, some algorithms use local-search methods to find a good upper-bound before doing branch-and-bound. We survey branch- and-bound MinCostSat algorithms in Chapter 3.
Show more

162 Read more

Applying Quantum Optimization Algorithms for Linear Programming

Applying Quantum Optimization Algorithms for Linear Programming

If non-zero element count d in rows and κ are small, this is an exponential improvement on standard classical algorithms. Indeed, one can even show that achieving a similar runtime classically would imply that classical computers could efficiently simulate any polynomial-time quantum computation [1].

6 Read more

Distributed nonconvex optimization: Algorithms and convergence analysis

Distributed nonconvex optimization: Algorithms and convergence analysis

We consider two popular network topologies, namely, the mesh network (MNet) (cf. Fig. 1.1 Left) and the star network (SNet) (cf. Fig. 1.1 Right). In the MNet, each node is connected via undirected links to a subset of nodes. Such a network is very popular in a number of applications. For example, in distributed signal processing [47, 117], each node can represent a sensor which has limited communication capability hence can only talk to its neighbors. On the other hand, SNet contains a central controller (i.e., the parent) which is connected to all other nodes (i.e., the children), and there is no connection between the children. Such a network can be used to model parallel computing architecture in which each child represents a computing node, and the parent coordinates the computation of the children [145, 80, 55]. In our work, we consider these different network topologies not only because they are capable of modeling a wide range of applications, but more importantly, their unique characteristics lead to a number of open challenges in designing distributed algorithms.
Show more

208 Read more

Coverage prediction and optimization algorithms for indoor environments

Coverage prediction and optimization algorithms for indoor environments

In this article, an algorithm for indoor path loss pre- diction at 2.4 GHz is proposed, avoiding the problems of both methods mentioned above. It is based on the calculation of the dominant path between transmitter and receiver [10]. Measurements have been performed in four buildings in Belgium for constructing and vali- dating the model. A comparison with ray-tracing simu- lations is executed. The applicability to an actual wireless testbed network is investigated. Furthermore, an algorithm for the reduction of the number of access points of a network is presented. Since networks are often overdimensioned, especially in office environ- ments, this algorithm could aid in reducing operating costs. Then, a network optimization algorithm is dis- cussed. This algorithm can be of great interest to any- one who wants to set up a new WiFi or sensor network in either home or professional environments. It allows meeting a certain throughput requirement with a mini- mum number of transmit nodes.
Show more

23 Read more

Energy Optimization Algorithms For Data Centers

Energy Optimization Algorithms For Data Centers

gorithms, gossip-based protocol and the Hungarian method of assignment. Description of these techniques along with a background in cloud computing will be provided in Section 2. Section 3 discusses a macro-based algorithm. Section 4 pro- vides details on micro-based algorithms. The results of these algorithms are presented in Section 5. Next, ramifications of these algorithms are presented in Section 6. Comparisons between these algorithms will not be discussed due to the fact that the algorithms were optimizing different parame- ters and there was not a standard representation of result data.
Show more

6 Read more

A comprehensive review of swarm optimization algorithms

A comprehensive review of swarm optimization algorithms

m is the number of ants in the system and p is the pheromone evaporation rate or decay factor. ACO has several advantages over other evolutionary approaches including offering positive feedback resulting in rapid solution fi nding, and having distributed computation which avoids premature convergence. These are in addition to taking advantage of the existing collective in- teraction of a population of agents [26, 27]. However, ACO has drawbacks such as slower con- vergence compared with other heuristic-based methods and lack a centralized processor to guide it towards good solutions. Although the convergence is guaranteed, the time for conver- gence is uncertain. Another important demerit of ACO is its poor performance within prob- lems with large search spaces [26, 27]. ACO has been applied in various optimization problems such as traveling salesman problem (TSP) [28], quadratic assignment problem [29], vehicle routing [30], network model problem [31, 32], image processing [33], path planning for mobile robot [34], path optimization for UAV System [35], project management [36] and so on.
Show more

37 Read more

Optimization algorithms for shortest path analysis

Optimization algorithms for shortest path analysis

The following FLOYD-WARSHALL be output the shortest Enter the weight seen when listing SHORTEST Finds running the Floyd-Warshall Algorithm path matrix the algfw.c program is on a network[r]

140 Read more

Optimization Algorithms in Wireless and Quantum Communications

Optimization Algorithms in Wireless and Quantum Communications

Effectively all algorithms developed in this chapter can be divided in two groups de- pending on the type of the problem that they were designed for. The first group (SDsdp, GSPHSD, SPHSD, PLTSD) is specifically designed for binary problems, while the second group (EIGSD) is specifically designed for higher-order constellation problems. From the results that we presented, the SDsdp, GSPHSD, and EIGSD algorithms seem to outper- form the standard SD in the simulated regimes in terms of flop-count. Furthermore the distributions of their flop counts have a significantly shorter tail than the distribution of the SD. However, SPHSD and PLTSD don’t perform as well as the standard SD in terms of the flop count and flop count histogram. These results suggest that using a lower-bounding technique is useful, but only if the lower bound can be computed in a fast manner.
Show more

190 Read more

Algorithms for Hyper-Parameter Optimization

Algorithms for Hyper-Parameter Optimization

We hope that our work may spur researchers in the machine learning community to treat the hyper- parameter optimization strategy as an interesting and important component of all learning algo- rithms. The question of “How well does a DBN do on the convex task?” is not a fully specified, empirically answerable question – different approaches to hyper-parameter optimization will give different answers. Algorithmic approaches to hyper-parameter optimization make machine learning results easier to disseminate, reproduce, and transfer to other domains. The specific algorithms we have presented here are also capable, at least in some cases, of finding better results than were pre- viously known. Finally, powerful hyper-parameter optimization algorithms broaden the horizon of models that can realistically be studied; researchers need not restrict themselves to systems of a few variables that can readily be tuned by hand.
Show more

10 Read more

Algorithms for the Optimization of Well Placements—A Comparative Study

Algorithms for the Optimization of Well Placements—A Comparative Study

Numerous optimization algorithms have been developed to solve Well place- ment problems. Amongst them are: Particle Swarm Optimization (PSO), Genet- ic Algorithm (GA), and Simulated Annealing (SA). These algorithms are either used in their pure form or modified/hybridized in a way to improve its accuracy and/or speed. Minton [8] gave a comprehensive review of the most common op- timization tools used to optimize Well placement in the Petroleum industry.

11 Read more

Dynamic Optimization Infrastructure and Algorithms for IA-64

Dynamic Optimization Infrastructure and Algorithms for IA-64

chosen to build online dynamic optimizers, few have built offline optimizers and none have built a combination online/offline dynamic optimizer. Online/offline optimization may be very effective if the offline optimizer uses data gathered from the online optimizer. The DO proposal presented in 0 is quite feasible for implementation as part of a Ph.D. thesis. While undertaking such a large project is challenging, having the infrastructure available to study the synergy between online and offline optimizations could pay off in the long run. In addition, releasing this tool to the research domain could then propagate the interest in studying dynamic optimization algorithms, as the methodology for testing would be greatly simplified.
Show more

106 Read more

Show all 10000 documents...