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Particle swarm optimizer: Economic dispatch wit...
34,99 € *
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Four modified versions of particle swarm optimizer (PSO) have been applied to the economic power dispatch with valve-point effects. In order to obtain the optimal solution, traditional PSO search a new position around the current position. The proposed strategies which explore the vicinity of particle s best position found so as far leads to a better result. In addition, to deal with the equality constraint of the economic dispatch problems, a simple mechanism is also devised that the difference of the demanded load and total generating power is evenly shared among units except the one reaching its generating limit. To show their capability, the proposed algorithms are applied to thirteen.Comparision among particle swarm optimization is given. The results show that the proposed algorithms indeed produce more optimal solutions in both cases.The different PSO techniques are New PSO, Self-Adaptive PSO and Chaotic PSO Among the different PSO techniques, it is found that Self-Adaptive PSO is better than other PSO techniques in terms of better solutions, speed of convergence, time of execution and robustness but it has more premature convergence.

Anbieter: Dodax
Stand: 23.01.2020
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Genetic Query Optimization for Large Databases
79,00 € *
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As the amount of stored data grows, the relational schemas needed to organize all these data get more complex, increasing the number of relations in the database. As a consequence, it becomes necessary to write SQL queries that involve a large number of relations. Once a SQL query is introduced into the DBMS, the query optimizer must find the most efficient query execution plan to solve it. State-of-the-art query optimizers, which typically employ dynamic programming techniques, are limited in the number of joins they can handle. In these situations, optimizers either resort to heuristics or fall back to greedy algorithms. However, greedy algorithms do not consider the entire search space and thus may overlook the optimal plan, resulting in bad query performance. In this book, we present a query optimizer based on genetic programming algorithms. We compare the results yielded by our optimizer with those yielded by the UDB DB2 optimizer, as well as some of the most efficient randomized algorithms proposed in the literature. Our studies show that the larger the number of relations involved in the query, the larger the benefit obtained by this type of optimizers.

Anbieter: Dodax
Stand: 23.01.2020
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Genetic Query Optimization for Large Databases
81,30 € *
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As the amount of stored data grows, the relational schemas needed to organize all these data get more complex, increasing the number of relations in the database. As a consequence, it becomes necessary to write SQL queries that involve a large number of relations. Once a SQL query is introduced into the DBMS, the query optimizer must find the most efficient query execution plan to solve it. State-of-the-art query optimizers, which typically employ dynamic programming techniques, are limited in the number of joins they can handle. In these situations, optimizers either resort to heuristics or fall back to greedy algorithms. However, greedy algorithms do not consider the entire search space and thus may overlook the optimal plan, resulting in bad query performance. In this book, we present a query optimizer based on genetic programming algorithms. We compare the results yielded by our optimizer with those yielded by the UDB DB2 optimizer, as well as some of the most efficient randomized algorithms proposed in the literature. Our studies show that the larger the number of relations involved in the query, the larger the benefit obtained by this type of optimizers.

Anbieter: Dodax AT
Stand: 23.01.2020
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Optimize Structural Topology and Computer Exper...
79,00 € *
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Two new topology optimization methods are presented and many sampling design methodologies for computer experiments are compared. HIMO combines a sizing optimizer with a metamodeling technique. A sizing optimizer finds feasible and optimal solutions in size (e.g. plate thickness). All performance constraints are handled. Then a metamodel is to fit all optimal solutions and is then used to find the optimal topology design. Only the objective (e.g. weight) is approximated, thus large-scale structural systems can be optimized. HIMO resulted in 18% and 36% weight savings for two real projects. SOTO directly uses a sizing optimizer to optimize topology as well as thickness. The thinner elements are gradually deleted to achieve improved topology. The design problem is then reformulated with much fewer design variables for final sizing optimization. To improve metamodeling in HIMO, 18 experimental design methods are compared. Sample sizes affect accuracy more than design types. Enough samples are needed to achieve low error with one-stage sampling. More uniform sampling does not generally lead to more accurate prediction unless involving extremely non-uniformity.

Anbieter: Dodax
Stand: 23.01.2020
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Optimize Structural Topology and Computer Exper...
81,30 € *
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Two new topology optimization methods are presented and many sampling design methodologies for computer experiments are compared. HIMO combines a sizing optimizer with a metamodeling technique. A sizing optimizer finds feasible and optimal solutions in size (e.g. plate thickness). All performance constraints are handled. Then a metamodel is to fit all optimal solutions and is then used to find the optimal topology design. Only the objective (e.g. weight) is approximated, thus large-scale structural systems can be optimized. HIMO resulted in 18% and 36% weight savings for two real projects. SOTO directly uses a sizing optimizer to optimize topology as well as thickness. The thinner elements are gradually deleted to achieve improved topology. The design problem is then reformulated with much fewer design variables for final sizing optimization. To improve metamodeling in HIMO, 18 experimental design methods are compared. Sample sizes affect accuracy more than design types. Enough samples are needed to achieve low error with one-stage sampling. More uniform sampling does not generally lead to more accurate prediction unless involving extremely non-uniformity.

Anbieter: Dodax AT
Stand: 23.01.2020
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Nova EUPHORIA 600 Plus System
6.146,00 € *
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EX600 - Eigenschaften:   System Type: 6 x 5", two-way, compact line array   HF Horn: Waveguide horn with HDO Highrange Device Optimizer   Crossover Modes: Passive   Crossover Frequency: 1.5 kHz   Power Rating (Continuous** / Program): Passive: 800 W / 1.600 W   Maximum SPL***: 133 dB SPL peak   System Sensitivity (1w/1m): 100 dB SPL   Finish: NOVA PolyCoat©   Grille: Powder coated, black, perforated steel with acoustic, transparent charcoal foam backing, NOVA logo   Input Connectors: 2 x Neutrik© Speakon© NL4, 1+/1- (2+/2- linked from input to output)   Dimensions (W x H x D): 150 mm x 1.000 mm x 183 mm   Net Weight: 17 kg

Anbieter: Locamo
Stand: 23.01.2020
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Apress The Definitive Guide to Google AdWords S...
37,19 € *
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There is one simple way to exponentially increase the amount of traffic coming to your website and the number of people aware of your product or service: through the use of Google AdWords and related marketing technologies. The Definitive Guide to Google AdWords will walk you through every step needed to maximize your marketing and advertising power.   Everything related to the platforms are covered in detail—account setup, campaign creation, reporting, optimization, analytics, ad creation, mobile advertising, and much more. Learn to take full advantage of all of the marketing options available through AdWords, including: Geo-targeting, distribution, and placement of ads Advanced account management and budget strategies Keywords, metrics, and ROI management Tools such as Keywords Editor, Website Optimizer, and Conversion Optimizer Mobile marketing implementations and strategies Working with the various APIs available for developers With The Definitive Guide to Google AdWords, you will learn how AdWords works and how you can harness its power to increase your visibility and dramatically impact your potential for increased revenue.

Anbieter: Dodax AT
Stand: 23.01.2020
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Apress The Definitive Guide to Google AdWords S...
35,70 € *
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There is one simple way to exponentially increase the amount of traffic coming to your website and the number of people aware of your product or service: through the use of Google AdWords and related marketing technologies. The Definitive Guide to Google AdWords will walk you through every step needed to maximize your marketing and advertising power.   Everything related to the platforms are covered in detail—account setup, campaign creation, reporting, optimization, analytics, ad creation, mobile advertising, and much more. Learn to take full advantage of all of the marketing options available through AdWords, including: Geo-targeting, distribution, and placement of ads Advanced account management and budget strategies Keywords, metrics, and ROI management Tools such as Keywords Editor, Website Optimizer, and Conversion Optimizer Mobile marketing implementations and strategies Working with the various APIs available for developers With The Definitive Guide to Google AdWords, you will learn how AdWords works and how you can harness its power to increase your visibility and dramatically impact your potential for increased revenue.

Anbieter: Dodax
Stand: 23.01.2020
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Group Search Optimizer for Economic Load Dispatch
54,90 € *
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The economic load dispatch (ELD) is the process of allocating the forecasted load demand among the committed generating units in electric power system and its primary objective is to minimize the total cost of generation while honoring the operational constraints of the available generation's resource. This thesis concerns with the implementation of group search optimizer (GSO) to find the global solution for nonlinear optimization problems while satisfying equality and inequality constraints in the context of time expansive evaluation of functions. GSO technique implements the animal scanning mechanism metamorphically to design optimum searching strategies for solving optimization problems. Group search algorithm employed in this work is population based algorithm, and resource searching process of animals in nature is analogous to the process of seeking optima in a search space. The promising results on the benchmark function show the applicability of the group search optimizer for solving economic load dispatch problem. The validity of the proposed method has been demonstrated for three, four and six generator electrical power system.

Anbieter: Dodax
Stand: 23.01.2020
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