Skocz do pozycji: 1.

Tytuł:

Self-Adaptive Differential Evolution with Hybrid Rules of Perturbation for Dynamic Optimization

Autorzy:

Trojanowski, K.
Raciborski, M.
Kaczyński, P.

Powiązania:

https://bibliotekanauki.pl/articles/308439.pdf

Data publikacji:

2011

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

adaptive differential evolution
dynamic optimization
symmetric a-stable distribution

Opis:

In this paper an adaptive differential evolution approach for dynamic optimization problems is studied. A new benchmark suite Syringa is also presented. The suite allows to generate test-cases from a multiple number of dynamic optimization classes. Two dynamic benchmarks: Generalized Dynamic Benchmark Generator (GDBG) and Moving Peaks Benchmark (MPB) have been simulated in Syringa and in the presented research they were subject of the experimental research. Two versions of adaptive differential evolution approach, namely the jDE algorithm have been heavily tested: the pure version of jDE and jDE equipped with solutions mutated with a new operator. The operator uses a symmetric ?-stable distribution variate for modification of the solution coordinates.

Źródło:

Journal of Telecommunications and Information Technology; 2011, 4; 20-30
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Evolutionary multi-agent systems in non-stationary environments

Autorzy:

Kisiel-Dorohinicki, M.

Powiązania:

https://bibliotekanauki.pl/articles/305810.pdf

Data publikacji:

2013

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

multi-agent systems
evolutionary computation
dynamic optimization
non-stationary environment

Opis:

In this article, the performance of an evolutionary multi-agent system in dynamic optimization is evaluated in comparison to classical evolutionary algorithms. The starting point is a general introduction describing the background, structure and behavior of EMAS against classical evolutionary techniques. Then, the properties of energy-based selection are investigated to show how they may influence the diversity of the population in EMAS. The considerations are illustrated by experimental results based on the dynamic version of the well-known, high-dimensional Rastrigin function benchmark.

Źródło:

Computer Science; 2013, 14 (4); 563-575
1508-2806
2300-7036

Pojawia się w:

Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Multi-swarm that learns

Autorzy:

Trojanowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/969816.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

particle swarm optimization (PSO)
multi-swarm
dynamic optimization
memory
clusters
clustering evolving data streams
quantum particles

Opis:

This paper studies particle swarm optimization approach enriched by two versions of an extension aimed at gathering information during the optimization process. Application of these extensions, called memory mechanisms, increases computational cost, but it is spent to a benefit by incorporating the knowledge about the problem into the algorithm and this way improving its search abilities. The first mechanism is based on the idea of storing explicit solutions while the second one applies one-pass clustering algorithm to build clusters containing search experiences. The main disadvantage of the former mechanism is lack of good rules for identification of outdated solutions among the remembered ones and as a consequence unlimited growth of the memory structures as the optimization process goes. The latter mechanism uses other form of knowledge representation and thus allows us to control the amount of allocated resources more efficiently than the former one. Both mechanisms have been experimentally verified and their advantages and disadvantages in application for different types of optimized environments are discussed.

Źródło:

Control and Cybernetics; 2010, 39, 2; 359-375
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Optimisation of operating conditions in fed-batch baker’s yeast fermentation

Autorzy:

Atasoy, I.
Yuceer, M.
Berber, R.

Powiązania:

https://bibliotekanauki.pl/articles/185738.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fed-batch fermenter
baker's yeast
dynamic optimization
SQP
Nonlinear
fermentator półciągły
drożdże piekarskie
optymalizacja dynamiczna
nieliniowość

Opis:

Saccharamyces cerevisia known as baker’s yeast is a product used in various food industries. Worldwide economic competition makes it a necessity that industrial processes be operated in optimum conditions, thus maximisation of biomass in production of saccharamyces cerevisia in fedbatch reactors has gained importance. The facts that the dynamic fermentation model must be considered as a constraint in the optimisation problem, and dynamics involved are complicated, make optimisation of fed-batch processes more difficult. In this work, the amount of biomass in the production of baker’s yeast in fed-batch fermenters was intended to be maximised while minimising unwanted alcohol formation, by regulating substrate and air feed rates. This multiobjective problem has been tackled earlier only from the point of view of finding optimum substrate rate, but no account of air feed rate profiles has been provided. Control vector parameterisation approach was applied the original dynamic optimisation problem which was converted into a NLP problem. Then SQP was used for solving the dynamic optimisation problem. The results demonstrate that optimum substrate and air feeding profiles can be obtained by the proposed optimisation algorithm to achieve the two conflicting goals of maximising biomass and minimising alcohol formation.

Źródło:

Chemical and Process Engineering; 2013, 34, 1; 175-186
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

A Performance Study on Synchronous and Asynchronous Update Rules for A Plug-In Direct Particle Swarm Repetitive Controller

Autorzy:

Ufnalski, B.
Grzesiak, L. M.

Powiązania:

https://bibliotekanauki.pl/articles/141272.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

repetitive process control
particle swarm optimization (PSO)
synchronous and asynchronous update rules
dynamic optimization problem
repetitive disturbance rejection
optimal control

Opis:

In this paper two different update schemes for the recently developed plug-in direct particle swarm repetitive controller (PDPSRC) are investigated and compared. The proposed approach employs the particle swarm optimizer (PSO) to solve in on-line mode a dynamic optimization problem (DOP) related to the control task in the constant-amplitude constant-frequency voltage-source inverter (CACF VSI) with an LC output filter. The effectiveness of synchronous and asynchronous update rules, both commonly used in static optimization problems (SOPs), is assessed and compared in the case of PDPSRC. The performance of the controller, when synthesized using each of the update schemes, is studied numerically.

Źródło:

Archives of Electrical Engineering; 2014, 63, 4; 635-646
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Travel management optimization based on air pollution condition using Markov decision process and genetic algorithm (case study: Shiraz city)

Autorzy:

Bagheri, Mohammad
Ghafourian, Hossein
Kashefiolasl, Morteza
Pour, Mohammad Taghi Sadati
Rabbani, Mohammad

Powiązania:

https://bibliotekanauki.pl/articles/223520.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

air pollution
dynamic optimization
genetic algorithm
Markov decision-making process
zarządzanie transportem
optymalizacja
zanieczyszczenie powietrza
algorytm genetyczny
proces decyzyjny Markowa

Opis:

Currently, air pollution and energy consumption are the main issues in the transportation area in large urban cities. In these cities, most people choose their transportation mode according to corresponding utility including traveller's and trip’s characteristics. Also, there is no effective solution in terms of population growth, urban space, and transportation demands, so it is essential to optimize systematically travel demands in the real network of roads in urban areas, especially in congested areas. Travel Demand Management (TDM) is one of the well-known ways to solve these problems. TDM defined as a strategy that aims to maximize the efficiency of the urban transport system by granting certain privileges for public transportation modes, Enforcement on the private car traffic prohibition in specific places or times, increase in the cost of using certain facilities like parking in congested areas. Network pricing is one of the most effective methods of managing transportation demands for reducing traffic and controlling air pollution especially in the crowded parts of downtown. A little paper may exist that optimize urban transportations in busy parts of cities with combined Markov decision making processes with reward and evolutionary-based algorithms and simultaneously considering customers’ and trip’s characteristics. Therefore, we present a new network traffic management for urban cities that optimizes a multi-objective function that related to the expected value of the Markov decision system’s reward using the Genetic Algorithm. The planned Shiraz city is taken as a benchmark for evaluating the performance of the proposed approach. At first, an analysis is also performed on the impact of the toll levels on the variation of the user and operator cost components, respectively. After choosing suitable values for the network parameters, simulation of the Markov decision process and GA is dynamically performed, then the optimal decision for the Markov decision process in terms of total reward is obtained. The results illustrate that the proposed cordon pricing has significant improvement in performance for all seasons including spring, autumn, and winter.

Źródło:

Archives of Transport; 2020, 53, 1; 89-102
0866-9546
2300-8830

Pojawia się w:

Archives of Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Dynamic asset allocation under uncertainty for pension fund management

Autorzy:

Pflug, G.
Świętanowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/205561.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

model finansowy
optymalizacja stochastyczna
podejmowanie decyzji
procesy Markowa
asset liability management
financial modeling
investment
pension fund management
portfolio
risk management
stochastic dynamic optimization

Opis:

Decision making in managing the asset and liability structure of a pension fund can be supported by stochastic dynamic optimization. We discuss our model, which is based on data analysis and forecast for the asset-side as well as a simulation model for the liability side. The core of our decision support system consists of the following building blocks : a set of securities, a pricing module based on a multifactor Markov model to derive expected returns of securities, a simulation-based model for liabilities, a carefully chosen objective function suitable for the pension fund and a stochastic optimization problem solver. We consider the use of different objectives in the model and decomposition techniques to solve the stochastic portfolio optimization problem. Our final goal is to design an efficient parallel implementation.

Źródło:

Control and Cybernetics; 1999, 28, 4; 755-777
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Object library of algorithms for dynamic optimization problems; Benchmarking SQP and nonlinear interior point methods

Autorzy:

Błaszczyk, J.
Karbowski, A.
Malinowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/929795.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

optymalizacja dynamiczna
programowanie kwadratowe sekwencyjne
różniczkowanie automatyczne
obliczenia numeryczne
analiza danych
dynamic optimization
large-scale optimization
sequential quadratic programming
nonlinear interior-point methods
object-oriented numerical computations
automatic differentiation
performance data analysis

Opis:

The main purpose of this paper is to describe the design, implementation and possibilities of our object-oriented library of algorithms for dynamic optimization problems. We briefly present library classes for the formulation and manipulation of dynamic optimization problems, and give a general survey of solver classes for unconstrained and constrained optimization. We also demonstrate methods of derivative evaluation that we used, in particular automatic differentiation. Further, we briefly formulate and characterize the class of problems solved by our optimization classes. The solution of dynamic optimization problems with general constraints is performed by transformation into structured large-scale nonlinear programming problems and applying methods for nonlinear optimization. Two main algorithms of solvers for constrained dynamic optimization are presented in detail: the sequential quadratic programming (SQP) exploring the multistage structure of the dynamic optimization problem during the solution of a sequence of quadratic subproblems, and the nonlinear interior-point method implemented in a general-purpose large-scale optimizer IPOPT. At the end, we include a typical numerical example of the application of the constrained solvers to a large-scale discrete-time optimal control problem and we use the performance profiles methodology to compare the efficiency and robustness of different solvers or different options of the same solver. In conclusions, we summarize our experience gathered during the library development.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2007, 17, 4; 515-537
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Repetitive neurocontroller with disturbance feedforward path active in the pass-to-pass direction for a VSI inverter with an output LC filter

Autorzy:

Ufnalski, B.
Grzesiak, L. M.

Powiązania:

https://bibliotekanauki.pl/articles/200017.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

repetitive control
feedforward neural network
dynamic optimization problem
repetitive disturbance rejection
voltage source inverter
disturbance dual feedforward path
sterowanie powtarzalne
sieci neuronowe
problem optymalizacji dynamicznej
przetwornica napięcia
odrzucanie zakłóceń

Opis:

An enhancement to the previously developed repetitive neurocontroller (RNC) is discussed and investigated in the paper. Originally, the time-base generator (TBG) has been used to produce the only input signal for the neural approximator. The resulting search space makes the dynamic optimization problem (DOP) of shaping the control signal solvable with the help of a function approximator such as the feed-forward neural network (FFNN). The plant under consideration, i.e. a constant-amplitude constant-frequency voltage-source inverter (CACF VSI) with an output LC filter, is assumed to be equipped with the disturbance load current sensor to enable implementation of the disturbance feed-forward (pDFF) path as a part of the non-repetitive subsystem acting in the along the pass p-direction. An investigation has been undertaken to explore potential benefits of using this signal also as an additional input for the RNC to augment the approximation space and potentially enhance the convergence rate of the real-time search process. It is numerically demonstrated in the paper that the disturbance feed-forward path active in the pass-to-pass k-direction (kDFF) improves the dynamics of the repetitive part as well indeed.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 1; 115-125
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Plug-in direct particle swarm repetitive controller with a reduced dimensionality of a fitness landscape – a multi-swarm approach

Autorzy:

Ufnalski, B.
Grzesiak, L. M.

Powiązania:

https://bibliotekanauki.pl/articles/202046.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

repetitive process control
dynamic optimization problem
particle swarm optimizer
repetitive disturbance rejection
noninteracting subswarms
dimension-reduced fitness functional
powtarzalne sterowanie procesem
problem optymalizacji dynamicznej
optymalizator rojem cząstek
odrzucanie zakłóceń
sprawność funkcjonalna

Opis:

The paper describes a modification to the recently developed plug-in direct particle swarm repetitive controller (PDPSRC) for the sine-wave constant-amplitude constant-frequency (CACF) voltage-source inverter (VSI). The original PDPSRC algorithm assumes that the particle swarm optimizer (PSO) takes into account a performance index defined over the whole reference signal period. Each particle stores all the samples of the control signal, e.g. α = 200 samples for a controller working at 10 kHz and the reference frequency equal to 50 Hz. Therefore, the fitness landscape (i.e. the performance index) is -dimensional ( D), which makes optimization challenging. That solution can be categorized as the single-swarm one. It has been previously shown that the swarm controller does not suffer from long-term stability issues encountered in the classic iterative learning controllers (ILC). However, the convergence of the swarm has to be kept at a relatively low rate to enable successful exploitation in the D search space, which in turn results in slow responsiveness of the PDPSRC. Here a multi-swarm approach is proposed in which we divide a dynamic optimization problem (DOP) among less dimensional swarms. The reference signal period is segmented into shorter intervals and the control signal is optimized in each interval independently by separate swarms. The effectiveness of the proposed approach is illustrated with the help of numerical experiments on the CACF VSI with an output LC filter operating under nonlinear loads.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 857-866
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Dynamic programming approach to shape optimization

Autorzy:

Fulmański, P.
Nowakowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/206302.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

dynamic programming
shape optimization

Opis:

We provide a dynamic programming approach through the level set setting to structural optimization problems. By constructing a dual dynamic programming method we provide the verification theorem for optimal and "−optimal solutions of shape optimization problem.

Źródło:

Control and Cybernetics; 2014, 43, 3; 379-401
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Polioptymalizacja procesów nieliniowych
Polyoptimization of non-linear processes

Autorzy:

Tarnowski, W.

Powiązania:

https://bibliotekanauki.pl/articles/156779.pdf

Data publikacji:

2007

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

polioptymalizacja procesu
dyskretyzacja
zamiana zadania optymalizacji dynamicznej na zadanie optymalizacji statycznej
polyoptimization
discretization
conversion of dynamic to static optimization problem

Opis:

Sformułowano zadanie jednoczesnego poszukiwania polioptymalnej funkcji sterowania procesu oraz parametrów konstrukcyjnych obiektu, w którym ten proces przebiega. Zaproponowano dyskretyzację zmiennych niezależnych jako sposób zamiany na zadanie polioptymalizacji statycznej, znacznie łatwiejsze do rozwiązania. Podkreślono rolę sposobu dyskretyzacji. Przedstawiono przykład sterowania samochodem, i rozwiązano go za pomocą algorytmu genetycznego. Innym przykładem jest układ sterowania procesem sterowania nieliniowego. Przedstawiono oprogramowanie zadania. Omówiono otrzymane wyniki. Przedyskutowano metodykę postępowania.
An optimization problem of control functions and object parameters simultaneously, is formulated. Discretization of independent variables is to convert an original problem into a static optimization problem, much easier to be solved. A way of discretization is important on the adequacy and accuracy of a solution. Two examples are included: a control of a car, and an automatic control by the bi-stable regulator. Computer codes are given. A general methodology is proposed.

Źródło:

Pomiary Automatyka Kontrola; 2007, R. 53, nr 8, 8; 73-78
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Simulation and optimization of a new energy vehicle power battery pack structure

Autorzy:

Ruan, Guanqiang
Yu, Changqing
Hu, Xing
Hua, Jing

Powiązania:

https://bibliotekanauki.pl/articles/2055057.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

static
dynamic
modal
lightweight
optimization

Opis:

With the rapid growth in new energy vehicle industry, more and more new energy vehicle battery packs catch fire or even explode due to the internal short circuit. Comparing with traditional vehicles, the new energy vehicles industry should pay more attention to safety of power battery pack structures. The battery pack is an important barrier to protect the internal batteries. A battery pack structure model is imported into ANSYS for structural optimization under sharp acceleration, sharp turn and sharp deceleration turn conditions on the bumpy road. Based on the simulation, the battery pack structure is improved, and suitable materials are determined. Then the collision resistance of the optimized battery pack is verified, and the safety level is greatly improved. While ensuring the safety and reliability of the battery pack structure, it also reduces the weight to satisfy the lightweight design and complies with relevant technical standards.

Źródło:

Journal of Theoretical and Applied Mechanics; 2021, 59, 4; 565--578
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

A concept of using a dynamic programming method to optimize an investment portfolio allowing for asymmetric rates of return and a minimum risk portfol

Autorzy:

Tymiński, Jerzy

Powiązania:

https://bibliotekanauki.pl/articles/950699.pdf

Data publikacji:

2014

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

optimization
dynamic programming
asymmetry
risk

Opis:

Investment management on the capital market is a complex and multifarious process and the accuracy of decisions is an indispensable condition that an investor needs to fulfill if the expected economic results are to be achieved. The paper presents the concept of the optimization of investment portfolio on the capital market of shares. The maximum value of portfolio quality measure was used as an optimization criterion. It is expressed by the index of variability R/σ of the rate of return for each share in the portfolio. The cumulation of values of R/σ index in the successive years of the investigated period allowed for an econometric estimation of the continuous functions and their maximum. The indexes of asymmetry of rate of return for particular shares in the portfolio were introduced into the functions, which enabled to increase the efficiency of the selection of shares for the portfolio. This, in turn, allowed to achieve the optimum structure of shares in the portfolio.

Źródło:

Financial Sciences. Nauki o Finansach; 2014, 4(21); 52-61
2080-5993
2449-9811

Pojawia się w:

Financial Sciences. Nauki o Finansach

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Modelling of optimum cascade of ideal mixing reactors

Autorzy:

Efremov, G.
Geller, J.

Powiązania:

https://bibliotekanauki.pl/articles/298243.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

optimization
cascade reactors
dynamic programming
polymerization

Opis:

It is discussed the using of dynamic programming method to optimize the parameters of the cascade of ideal mixing reactors, which is held isothermal first order reaction. It is found, that the minimum volume of the cascade of reactors corresponds to the minimum residence time of substance in this cascade. The optimum value of residence time for all reactors are equal and all ratio of input and output concentrations are equal, hence, and all volumes of reactors are also equal. A total volume of the cascade of reactors is less than the amount single. Application of the method of dynamic programming is illustrated with an example of the calculation of the polymerization in a cascade of four reactors according to the literature experimental data.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2017, 20(2); 149-160
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Methods of thrust allocation in a DP simulation system of Maritime University of Szczecin

Autorzy:

Zalewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/320729.pdf

Data publikacji:

2016

Wydawca:

Polskie Forum Nawigacyjne

Tematy:

dynamic positioning thrust allocation
convex optimization

Opis:

Vessels conducting dynamic positioning (DP) operations are usually equipped with thruster configurations that enable generation of resultant force and moment in any direction. These configurations are deliberately redundant in order to reduce the consequences of thruster failures and increase the safety. On such vessels a thrust allocation system must be used to distribute the control actions determined by the DP controller among the thrusters. The optimal allocation of thrusters’ settings in DP systems is a problem that can be solved by several convex optimization methods depending on criteria and constraints used. The paper presents linear programming (LP) and quadratic programming (QP) methods adopted in DP control model which is being developed in Maritime University of Szczecin for ship simulation purposes.
Statki pozycjonowane dynamicznie (DP) mają konfiguracje pędników umożliwiające wytwarzanie wypadkowej siły i momentu w dowolnym kierunku. Konfiguracje te są zazwyczaj nadmiarowe w celu zmniejszenia skutków awarii pojedynczych pędników, a tym samym zwiększenia poziomu bezpieczeństwa wykonywanej pracy. Na takich jednostkach musi być stosowany system alokacji wyliczający i przydzielający nastawy do poszczególnych pędników. Optymalna alokacja nastaw pędników w systemach DP jest problemem, który można rozwiązać, w zależności od zadanych kryteriów i ograniczeń, kilkoma metodami optymalizacji wypukłej. W artykule przedstawiono metody programowania liniowego (LP) i kwadratowego (QP) zastosowane w modelu sterowania DP w symulatorach nawigacyjno-manewrowych Akademii Morskiej w Szczecinie.

Źródło:

Annual of Navigation; 2016, 23; 209-218
1640-8632

Pojawia się w:

Annual of Navigation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Practical Approach to Determining Dynamic Recrystallization Parameters Using Finite Element Optimization of Backward Extrusion Process

Autorzy:

Irani, Missam
Joun, Mansoo

Powiązania:

https://bibliotekanauki.pl/articles/352583.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

dynamic recrystallization
grain size
optimization
simulation

Opis:

In this study, we present a new method for obtaining the parameters of the Johnson-Mehl-Avrami-Kolmogorov equation for dynamic recrystallization grain size. The method consists of finite-element analysis and optimization techniques. An optimization tool iteratively minimizes the error between experimental values and corresponding finite-element solutions. Isothermal backward extrusion of the AA6060 aluminum alloy was used to acquire the main parameters of the equation for predicting DRX grain size. We compared grain sizes predicted using optimized and reference parameters with experimental values from the literature and found better agreement when the optimized parameters were applied.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 3; 1175-1182
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Constraints in allocation of thrusters in a DP simulator

Autorzy:

Zalewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/135012.pdf

Data publikacji:

2017

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

dynamic positioning
thrust allocation
convex optimization
constrained optimization
DP simulator
thrusters

Opis:

Vessels conducting dynamic positioning (DP) operations are usually equipped with thruster configurations that enable the generation of force and torque. Some thrusters in these configurations are deliberately redundant to minimize consequences of thruster failures, enable overactuated control and increase the safety in operation. On such vessels, a thrust allocation system must be used to distribute the control actions determined by the DP controller among the thrusters. The optimal allocation of the thrusters’ settings in DP systems is a problem that can be solved by convex optimization methods depending on the criteria and constraints used. This paper presents a quadratic programming (QP) method, adopted in a DP control model, which is being developed in Maritime University of Szczecin for ship simulation purposes.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 45-50
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Simulation-based sailboat trajectory optimization using on-board heterogeneous computers

Autorzy:

Dębski, R.

Powiązania:

https://bibliotekanauki.pl/articles/305745.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

black-box optimization
trajectory optimization
dynamic programming
heterogeneous computing
micro HPC platform

Opis:

A dynamic programming-based algorithm adapted to on-board heterogeneous computers for simulation-based trajectory optimization was studied in the context of high-performance sailing. The algorithm can efficiently utilize all OpenCL-capable devices, starting the computation (if necessary, in single precision) on a GPU and finalizing it (if necessary, in double-precision) with the use of a CPU. The serial and parallel versions of the algorithm are presented in detail. Possible extensions of the basic algorithm are also described. The experimental results show that contemporary heterogeneous on-board/mobile computers can be treated as micro HPC platforms. They offer high performance (the OpenCL-capable GPU was found to accelerate the optimization routine 41 fold) while remaining energy and cost efficient. The simulation-based approach has the potential to give very accurate results, as the mathematical model upon which the simulator is based may be as complex as required. The black-box represented performance measure and the use of OpenCL make the presented approach applicable to many trajectory optimization problems.

Źródło:

Computer Science; 2016, 17 (4); 461-481
1508-2806
2300-7036

Pojawia się w:

Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Optimization of space-time material layout for ID wave propagation with varying mass and stiffness parameters

Autorzy:

Jensen, J. S.

Powiązania:

https://bibliotekanauki.pl/articles/969896.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

dynamic structures
topology optimization
wave propagation
transient analysis

Opis:

Results are presented for optimal layout of materials in the spatial and temporal domains for a ID structure subjected to transient wave propagation. A general optimization procedure is outlined including derivation of design sensitivities for the case when the mass density and stiffness vary in time. The outlined optimization procedure is exemplified on a ID wave propagation problem in which a single gaussian pulse is compressed when propagating through the optimized structure. Special emphasis is put on the use of a time-discontinuous Galerkin integration scheme that facilitates analysis of a system with a time-varying mass matrix.

Źródło:

Control and Cybernetics; 2010, 39, 3; 599-614
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

A new nondeterministic method for optimal selection of master degrees of freedom for dynamic condensation based on evolutionary optimization

Autorzy:

Mucha, Waldemar

Powiązania:

https://bibliotekanauki.pl/articles/1839637.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dynamic condensation
optimization
evolutionary algorithm
model order reduction

Opis:

The following paper presents a new method for choosing a set of master degrees of freedom for the process of dynamic condensation in order to reduce a finite element model. The general rule is that the more degrees of freedom are eliminated, the more accurate the reduced model is. However, eliminating different subsets (of equal sizes) of degrees of freedom may influence the accuracy differently. Therefore, choosing an optimal subset is crucial. The presented method is based on multicriterial evolutionary optimization which makes it the first nondeterministic approach based on computational optimization technique for this application.

Źródło:

Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 445-458
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Dynamic analysis of a mechatronic drive system with an induction motor

Autorzy:

Cao, Yongdi
Liu, Xiaohong

Powiązania:

https://bibliotekanauki.pl/articles/2200885.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dynamic model
electromechanical system
vector control
optimization
rotor

Opis:

The paper presents research findings in the modelling and optimization of dynamic parameters of mechatronic systems with an induction motor. A mathematical model was developed to analyze currents in dynamic states of squirrel-cage rotors in the case of a line-to-line fault. The findings were verified experimentally using calculations for a 1.5 kW three-phase induction motor. The equations for a stationary 0x, 0y coordinate system relating to the stator were derived. The set of design variables selected in the optimization process contained parameters describing design features of the gear shafts and control units settings.

Źródło:

Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 245--258
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Convex optimization of thrust allocation in a dynamic positioning simulation system

Autorzy:

Zalewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/135112.pdf

Data publikacji:

2016

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

dynamic positioning
thrust allocation
convex optimization
configurations
programming
simulator

Opis:

Vessels conducting dynamic positioning (DP) operations are usually equipped with thruster configurations that enable the generation of resultant force and moment in any direction. These configurations are deliberately redundant in order to reduce the consequences of thruster failures and increase the safety. On such vessels a thrust allocation system must be used to distribute the control actions determined by the DP controller among the thrusters. The optimal allocation of thrusters’ settings in DP systems is a problem that can be solved by several convex optimization methods depending on criteria and constraints used. The paper presents linear programming (LP) and quadratic programming (QP) methods adopted in the DP control model which is being developed at the Maritime University of Szczecin for ship simulation purposes.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 48 (120); 58-62
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

DEA-Based Dynamic Assessment of Regional Environmental Efficiency

Autorzy:

Ratner, S.
Ratner, P.

Powiązania:

https://bibliotekanauki.pl/articles/1395584.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

data envelopment analysis
nonparametric optimization
dynamic problem
window analysis

Opis:

We apply window Data Envelopment Analysis (DEA) to the solution of the problem of assessment of the efficiency of regional production systems in Southern Russia. The proposed method allows to monitor the changes in efficiency of regional economic systems throughout time and has a high discrimination power. The simplicity of the technical implementation of the proposed method and the availability of the necessary software for its use allow one to hope for its wide implementation in the modern practice of regional environmental management.

Źródło:

Applied Computer Science; 2017, 13, 2; 48-60
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Using of dynamic vibration absorbers for regulation of vibrating compactor vibration properties
Wykorzystanie dynamicznych amortyzatorów wibracyjnych w celu regulowania charakterystyk wibracyjnych walców wibracyjnych

Autorzy:

Kernytskyy, I.
Diveyev, B.
Vybranets, J.
Kernytskyy, N.

Powiązania:

https://bibliotekanauki.pl/articles/40205.pdf

Data publikacji:

2008

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

dynamic property
dynamic vibration absorber
machine construction
mathematical model
optimization
parameter model
regulation
vibration property

Źródło:

Acta Scientiarum Polonorum. Architectura; 2008, 07, 3
1644-0633

Pojawia się w:

Acta Scientiarum Polonorum. Architectura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Optimization of the impact multi-mass vibration absorbers

Autorzy:

Kernytskyy, I.
Diveyev, B.
Horbaj, O.
Hlobchak, M.
Kopytko, M.
Zachek, O.

Powiązania:

https://bibliotekanauki.pl/articles/886928.pdf

Data publikacji:

2017

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

impact damping system
multi-mass
dynamic vibration absorber
optimization
simultaneous optimization
genetic algorithm
Boltzmann approximation

Opis:

Optimization of the impact multi-mass vibration absorbers. The problem of attaching dynamic vibration absorber (DVA) to a discrete multi-degree-of-freedom or continuous structure has been outlined in many papers and monographs. An impact damping system can overcome some limitations by impact as the damping medium and impact mass interaction as the damping mechanism. The paper contemplates the provision of DVA with the several of the impact masses. Such originally designed absorbers reduce vibration selectively in maximum vibration mode without introducing vibration in other modes. An impact damper is a passive control device which takes the form of a freely moving mass, constrained by stops attached to the structure under control, i.e. the primary structure. The damping results from the exchange of momentum during impacts between the mass and the stops as the structure vibrates. The paper contemplates the provision of the impact multi-mass DVA’s with masses collisions for additional damping. For some cases of DVA optimization such a design seems more effective than conventional multi-mass DVA with independent mass moving. A technique is developed to give the optimal DVA’s for the elimination of excessive vibration in harmonic stochastic and impact loaded systems.

Źródło:

Scientific Review Engineering and Environmental Sciences; 2017, 26, 3[77]
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Maintenance Evaluation and Optimization of a Multi-State System Based on a Dynamic Bayesian Network

Autorzy:

Dahia, Zakaria
Bellaouar, Ahmed
Dron, Jean-Paul

Powiązania:

https://bibliotekanauki.pl/articles/2023959.pdf

Data publikacji:

2021-09

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

multi-state system
dynamic Bayesian network
reliability
availability
maintenance optimization

Opis:

Nowadays, the main challenge in maintenance is to establish a dynamic maintenance strategy to significantly track and improve the performance measures of multi-state systems in terms of production, quality, security and even the environment. This paper presents a quantitative approach based on Dynamic Bayesian Network (DBN) to model and evaluate the maintenance of multi-state system and their functional dependencies. According to transition relationships between the system states modeled by the Markov process, a DBN model is established. The objective is to evaluate the reliability and the availability of the system with taking into account the impact of maintenance strategies (perfect repair and imperfect repair). Using the proposed approach, the dynamic probabilities of system states can be determined and the subsystems contributing to system failure can also be identified. A practical application is demonstrated by a case study of a blower system. Through the result of the diagnostic inference, to improve the performances of the blower, the critical components C, F, W, and P should be given more attention. The results indicate also that the perfect repair strategy can improve significantly the performances of the blower, while the imperfect repair strategy cannot degrade the performances in comparison to the perfect repair strategy. These results show the effectiveness of this approach in the context of a predictive evaluation process and in providing the opportunity to evaluate the impact of the choices made on the future measurement of systems performances. Finally, through diagnostic analysis, intervention management and maintenance planning are managed efficiently and optimally.

Źródło:

Management and Production Engineering Review; 2021, 13, 3; 3-14
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Shape optimization for dynamic contact problems

Autorzy:

Myśliński, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/729249.pdf

Data publikacji:

2000

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

dynamic unilateral problem
shape optimization
sensitivity analysis
necessary optimality condition

Opis:

The paper deals with shape optimization of dynamic contact problem with Coulomb friction for viscoelastic bodies. The mass nonpenetrability condition is formulated in velocities. The friction coefficient is assumed to be bounded. Using material derivative method as well as the results concerning the regularity of solution to dynamic variational inequality the directional derivative of the cost functional is calculated and the necessary optimality condition is formulated.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2000, 20, 1; 79-91
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Optimization of the semi-active vibration absorbers

Autorzy:

Snitynskyy, Volodymyr
Kernytskyy, Ivan
Diveyev, Bohdan
Horbay, Orest
Fornalchyk, Yevhen
Humenuyk, Ruslan
Sholudko, Yaroslav

Powiązania:

https://bibliotekanauki.pl/articles/35536985.pdf

Data publikacji:

2021

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

dynamic vibration absorber
semi-active
adaptive scheme
optimization
robustness
design

Opis:

In this paper, an efficient numerical approach is proposed to maximize the minimal damping of modes in a prescribed frequency range for general viscous tuned-mass systems. Methods of decomposition and numerical synthesis are considered on the basis of the adaptive schemes. The influence of dynamic vibration absorbers and basic design elastic and damping properties is under discussion. A technique is developed to give the optimal DVA’s for the elimination of excessive vibration in sinusoidal and impact forced system. One task of this work is to analyze parameters identification of the dynamic vibration absorber and the basic structure. The questions of robustness at optimization of DVA are considered. Different types of control management for semi-active DVA’s are applied. Examples of DVA’s practical implementation are presented.

Źródło:

Scientific Review Engineering and Environmental Sciences; 2021, 30, 2; 327-336
1732-9353

Pojawia się w:

Scientific Review Engineering and Environmental Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Solving Markov decision processes by d-graph algorithms

Autorzy:

Kátai, Z.

Powiązania:

https://bibliotekanauki.pl/articles/205688.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

Markov decision processes
dynamic programming
graph representation
graph algorithms
optimization problems

Opis:

Markov decision processes (MDPs) provide a mathematical model for sequential decisionmaking (sMDP/dMDP: stochastic/ deterministic MDP). We introduce the concept of generalized dMDP (g-dMDP) where each action may result in more than one next (parallel or clone) state. The common tools to represent dMDPs are digraphs, but these are inadequate for sMDPs and g-dMDPs. We introduce d-graphs as general tools to represent all the above mentioned processes (stationary versions). We also present a combined d-graph algorithm that implements dynamic programming strategies to find optimal policies for the finite/infinite horizon versions of these Markov processes. (The preliminary version of this paper was presented at the Conference MACRo 2011.)

Źródło:

Control and Cybernetics; 2012, 41, 3; 577-593
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

On the optimum absorber parameters: revising the classical results

Autorzy:

Puzyrov, V.
Awrejcewicz, J.

Powiązania:

https://bibliotekanauki.pl/articles/281548.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

dynamic vibration absorber
Den Hartog’s model
frequency-amplitude curve
optimization

Opis:

The dynamic vibration absorber is a kind of mechanical device with inertia, stiffness, and damping. Once connected to a given structure or machine, it is capable of absorbing vibratory energy. As a result, the primary system can be protected from excessively high vibration levels. In this paper, we deal with classical Den Hartog’s model to clarify the known results and improve the mathematical component of this approach. We suggest the optimal choice of absorber parameters, which is slightly different and more general analytical approach. The comparison of two methods of optimization is carried out, and the corresponding error of calculus is estimated.

Źródło:

Journal of Theoretical and Applied Mechanics; 2017, 55, 3; 1081-1089
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Parallel Dynamic Programming Algorithms : Multitransputer Systems

Autorzy:

Sadecki, J.

Powiązania:

https://bibliotekanauki.pl/articles/907983.pdf

Data publikacji:

2002

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

automatyka
dynamic programming
parallel computations
transputers
multitransputer systems
parallel optimization algorithms

Opis:

The present paper discusses real parallel computations. On the basis of a selected group of dynamic programming algorithms, a number of factors affecting the efficiency of parallel computations such as, e.g., the way of distributing tasks, the interconnection structure between particular elements of the parallel system or the way of organizing of interprocessor communication are analyzed. Computations were implemented in the parallel multitransputer SUPER NODE 1000 system using from 5 to 50 transputers.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2002, 12, 2; 241-255
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Energy-Efficient Routing Based on Dynamic Programming for Wireless Multimedia Sensor Networks (WMSNs)

Autorzy:

Putra, E. H.
Hidayat, R.
Widyawan, -
Mustika, I. W.

Powiązania:

https://bibliotekanauki.pl/articles/963818.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wireless multimedia sensor networks (WMSNs)
energy efficient routing
optimization
dynamic programming

Opis:

Wireless Multimedia Sensor Networks (WMSNs) advances can route multimedia applications from source nodes to a sink. However, they require energy efficiency and network lifetime due to limited power resources in the sensor nodes. This paper proposes an energy-efficient routing optimization for multimedia transmission in WMSNs. The optimization utilizes a routing algorithm based on the dynamic programming. The routing optimization algorithm selects intermediary nodes which have minimum energy above 60%. Then, the priority selection of paths immediately finds neighboring nodes which have the greatest energy minimum. If there is the same minimum energy between the neighboring nodes, then the second priority selection is based on smaller link cost.

Źródło:

International Journal of Electronics and Telecommunications; 2017, 63, 3; 279-283
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Impact and particle vibration absorbers optimal design
Działanie oraz optymalna konstrukcja dynamicznego absorbera drgań

Autorzy:

Snitynskyy, V.
Kernytskyy, I.
Diveyev, B.
Horbay, O.
Koruniak, P.
Humenyuk, R.
Kokhana, T.

Powiązania:

https://bibliotekanauki.pl/articles/2083884.pdf

Data publikacji:

2020

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

dynamic vibration absorber
particle-based damping system
buffered absorber
optimization
design

Opis:

The paper contemplates the provision of impact or particle dynamic vibration absorber (DVA). An efficient numerical approach based on the theoretical-experimental method is proposed to maximize the minimal damping of modes in a prescribed frequency range for general viscous tuned-mass systems. Methods of decomposition and numerical synthesis on the basis of adaptive schemes are considered. The influence of dynamic vibration absorbers and basic design elastic and damping properties is under discussion. Compact buffered impact absorbers are analysed. One task of this work is to analyse parameters identification of the dynamic vibration absorber and the basic structure. The work focused on a single degree of order (SDOF) system which is equivalent to particle DVA. The simulation provides a close agreement with the measurements over various entire frequency ranges, which means the SDOF is simple yet easy to calculate the damped motion, compared with the experimental results of particle DVA. Examples of the attachment of particle DVA’s and elongated element with multi-mass impact DVA’s are offered. The paper contemplates the provision of the impact multi-mass DVA’s with masses collisions and traction for additional damping. A technique is developed to give the optimal DVA’s for the elimination of excessive vibration in harmonic and impact loaded systems.

Źródło:

Acta Scientiarum Polonorum. Architectura; 2020, 19, 1; 93-102
1644-0633

Pojawia się w:

Acta Scientiarum Polonorum. Architectura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Performance Analysis of Dynamic PUCCH Allocation Algorithm in LTE Network

Autorzy:

Czerniecki, Maciej
Wszołek, Jacek
Sikora, Marek
Ludwin, Wiesław

Powiązania:

https://bibliotekanauki.pl/articles/226869.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

optimization
planning
PUCCH dimensioning
network planning
network optimization
self-organizing networks
SON
dynamic PUCCH allocation
static PUCCH allocation

Opis:

The aim of the presented paper was to verify the impact of Dynamic PUCCH Resource Allocation Algorithm of the LTE cellular system on the maximum uplink cell throughput and call setup success rate - CSSR. Paper includes the laboratory testbed description and presents the results of an experiment confirming the improvement of both key performance indicators KPIs. Apart from the presentation of the Dynamic PUCCH Resource allocation algorithm, the paper also includes a description of legacy LTE uplink (PUCCH and PUSCH) channels dimensioning process thus filling the gap of such a tutorial in the available literature.

Źródło:

International Journal of Electronics and Telecommunications; 2020, 66, 1; 211-216
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Methods for improving the dynamic properties of the air braking systems of low-speed agricultural trailers

Autorzy:

Kulikowski, Krzysztof
Kamiński, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/263407.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

air braking systems dynamic
agricultural trailer
braking system optimization
air brake valve

Opis:

Too low an operating speed of trailer air braking systems may lead to an inhibition of the braking asynchrony of agricultural tractor trailer units. Improved braking dynamics advanced braking systems with an electronic control unit (e.g. Trailer EBS) provide a more rational solution for high speed agricultural vehicles. In this paper, an overview of other methods for developing the dynamic properties of air braking systems for agricultural trailers is described. This paper provides an examples of braking system design parameters optimization, using a variety of accelerating valves and dynamic properties correcting devises, also as well, by using simple systems with an electronic controllers. The described methods of dynamic properties improvements can be used to improve the speed and operation synchrony of the air braking systems of low-speed agricultural trailers. The paper presents the influence of some of the described methods, with different levels of complexity, on the properties of typical air braking systems.

Źródło:

Archiwum Motoryzacji; 2019, 84, 2; 5-22
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Nonlinear method of determining the vehicle pre-crash speed based on B-spline with propabilistic weights - subcompact car class

Autorzy:

Kubiak, Przemyslaw
Sys, Ewa
Goslawski, Lukasz
Manko, Maria
Gralewski, Jacek
Krukowski, Mateusz
De Sousa, Ricardo Alves
Mrowicki, Adam
Soghabatyan, Tigran
Zou, Tiefang

Powiązania:

https://bibliotekanauki.pl/articles/263553.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

air braking systems dynamic
agricultural trailer
braking system optimization
air brake valve

Opis:

A new non-linear method utilizing the work W of car deformation is considered in this study. The car deformation is defined as an algebraic function of deformation ratio Cs. The method of variable correlation is exploited in order to develop experimental data. To determinate mathematical model parameters, data from the NHTSA database including frontal crash tests are used. Such database is comprised of substantial number of crash cases and main focus was put on frontal impacts. In the non-linear method used so far, the so-called energetic approach, collisions are considered non-elastic. The speed threshold defining the elastic collision was set to be 11 km/h. This simplistic approach is used to determine the linear relation of energy loss during deformation on deformation coefficient Cs. Deformation points C1-C6 are taken into account while calculating a mean value that defines this coefficient. A more accurate non-linear method as well as more complex form of deformation coefficient is suggested to determine the work of deformation in this paper. The focus of those methods is to establish the value of nonlinear coefficient b_k which is the slope factor of precrash velocity Vt and deformation ratio Cs function.

Źródło:

Archiwum Motoryzacji; 2019, 85, 3; 5-18
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Shape optimization of control problems described by wave equations

Autorzy:

Nowakowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/970316.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sufficient optimality conditions
control with wave equation
shape optimization
dual dynamic programming

Opis:

The control problem with multidimensional integral functional under wave type constraints for control is considered. Next a type of deformation with control of the domain is described and then we define suitable shape functional. Having denned trajectory and control of deformation dual dynamic programming tools are applied to derive optimality condition for the shape functional with respect to that deformation.

Źródło:

Control and Cybernetics; 2008, 37, 4; 1045-1055
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Research on preventive maintenance strategy of Coating Machine based on dynamic failure rate

Autorzy:

Gu, Dongwei
Nie, Ruihua
Han, Wenbo
Chen, Guang
Jia, Ligang

Powiązania:

https://bibliotekanauki.pl/articles/24200819.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

dynamic preventive maintenance model
DM
BP-LSTM
dynamic failure rate threshold
preventive maintenance strategy
Genetic-Particle Swarm Optimization
GPSO

Opis:

In this paper, a dynamic preventive maintenance strategy is proposed for the problem of high maintenance cost rate due to excessive maintenance caused by unreasonable maintenance threshold setting when complex electromechanical equipment maintenance strategy is formulated. Increasing failure rate factor and decreasing service age factor are introduced to describe the evolution rules of failure rate during the maintenance of the coating machine, and the BP-LSTM (BP-Long Short Term Memory Network, BP-LSTM) model is combined to predict the failure rate of the coating machine. A Dynamic preventive maintenance Model (DM) that relies on dynamic failure rate thresholds to classify the three preventive maintenance modes of minor, medium and major repairs is constructed. A dynamic preventive maintenance strategy optimization process based on Genetic-Particle Swarm Optimization (GPSO) algorithm with the lowest cost rate per unit time in service phase is built to solve the difficult problem of dynamic failure rate threshold finding. Based on the historical operating data of the coating machine, a case study of the dynamic preventive maintenance strategy of the coating machine was conducted to verify the effectiveness of the model and the developed maintenance strategy proposed in this paper. The results show that the maintenance strategy developed in this paper can ensure better economy and applicability.

Źródło:

Eksploatacja i Niezawodność; 2023, 25, 1; atr. no. 20
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Computational Fluid Dynamic study on the wind characteristics of a multifunctional building system model in developed coastal cities

Autorzy:

Gerigk, Mateusz
Jachowski, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/135259.pdf

Data publikacji:

2019

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

architectural design
Computational Fluid Dynamic (CFD)
multifunctional building
system model
optimization
sustainable environment

Opis:

This paper presents an approach for providing innovative technology by applying fluid mechanics to the field of architectural design. The aim is to make a building’s shape profitable and strengthen environmental protection by using the wind force to create an integrated wind absorption definition for a multifunctional building system model. Furthermore, taking control of the wind flow over an object can have an impact on not only the designed object itself but also on its surroundings. In modern coastal cities there are issues associated with the wind and ventilation that need to be solved. The presented system model and the calculations conducted are part of the new definition of a multifunctional object and the wind force as a significant subsystem. Systematizing this scope can be useful in design practice.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 27-33
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Parametric study on the spring-back effect in aa5052 alloy in the course of three-point roll bending process

Autorzy:

Shrinaath, Viswanathan
Vairavignesh, Ramalingam
Padmanaban, Ramasamy

Powiązania:

https://bibliotekanauki.pl/articles/1837930.pdf

Data publikacji:

2020

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

three-point roll bending
multi-pass forming process
springback
dynamic explicit analysis
optimization

Opis:

Three-point roll bending is one of the most common forming processes employed to obtain the desired radius of curvature in the sheet metal operations. Upon the removal of the forming load, the sheet metal deforms to a lesser extent than that of the required dimension. This phenomenon is termed as spring-back and is considered the most challenging areas of research in three-point roll bending of sheet metals. This study aims to develop a numerical model using HyperWorks and Radioss solver to understand the influence of load, the distance between the forming rollers, and its thickness on the spring-back effect in the course of three-point roll bending of sheet metal (AA5052). The results of the numerical model are validated with the results of the experimental trials. Besides, a statistical model is developed to relate the amount of spring-back with the three-point roll bending process parameters.

Źródło:

Acta Mechanica et Automatica; 2020, 14, 3; 128-134
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Reliability optimization design method based on multi-level surrogate model

Autorzy:

Li, Yong-Hua
Liang, Xiao-Jia
Dong, Si-Hui

Powiązania:

https://bibliotekanauki.pl/articles/1841935.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

Kriging model
reliability-based optimization
multi-level surrogate model
adaptive dynamic penalty function

Opis:

In this work, a genetic-algorithm-based Kriging model with multi-point addition sequence optimization strategy is addressed to make up for the shortcomings of Kriging model with single point criterion. This approach combines the multi-point addition strategy with genetic algorithm to enable the Kriging model to efficiently capture the globally optimal solution. Based on this, a multi-level surrogate method is presented by employing a local surrogate model to modify the Kriging global surrogate model, and then applied to design optimization to improve the accuracy and efficiency of global optimization. Meanwhile, a reliability design optimization method based on multi-level surrogate model is studied by dealing with the reliability constraints with an adaptive reliability penalty function. Numerical examples show that the proposed method can find the optimal solution of the object problem with the least calculation cost under the condition of satisfying the reliability constraint.

Źródło:

Eksploatacja i Niezawodność; 2020, 22, 4; 638-650
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

A reference point approach to bi-objective dynamic portfolio optimization

Autorzy:

Sawik, B.

Powiązania:

https://bibliotekanauki.pl/articles/375931.pdf

Data publikacji:

2009

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

dynamic portfolio
mixed-integer programming
reference point method
bi-objective optimization
value-at-risk

Opis:

The portfolio selection problem presented in this paper is formulated as a bi-objective mixed integer program. The portfolio selection problem considered is based on a dynamic model of investment, in which the investor buys and sells securities in successive investment periods. The problem objective is to dynamically allocate the wealth on different securities to optimize by reference point method the portfolio expected return and the probability that the return is not less than a required level. In computational experiments the dataset of daily quotations from the Warsaw Stock Exchange were used.

Źródło:

Decision Making in Manufacturing and Services; 2009, 3, 1-2; 73-85
1896-8325
2300-7087

Pojawia się w:

Decision Making in Manufacturing and Services

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Optimizations in Dynamic Origin Technique for Efficient Lane Detection for Autonomous Vehicles

Autorzy:

Maya, P.
Tharini, C.

Powiązania:

https://bibliotekanauki.pl/articles/27311931.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

lane detection
dynamic origin technique
partial hough transform
performance analysis
accuracy analysis
optimization
autonomous vehicles

Opis:

Driver assistance systems have started becoming a key differentiator in automotive space and all major automotive manufacturers have such systems with various capabilities and stages of implementation. The main building blocks of such systems are similar in nature and one of the major building blocks is road lane detection. Even though lane detection technology has been around for decades, it is still an ongoing area of research and there are still several improvements and optimizations that are possible. This paper offers an Optimized Dynamic Origin Technique (Optimized DOT) for lane detection. The proposed optimization algorithm of optimized DOT gives better results in performance and accuracy compared to other methods of lane detection. Analysis of proposed optimized DOT with various edge detection techniques, various threshold levels, various sample dataset and various lane detection methods were done and the results are discussed in this paper. The proposed optimized DOT lane detection average processing time increases by 9.21 % when compared to previous Dynamic Origin Technique (DOT) and 59.09 % compared to traditional hough transform.

Źródło:

International Journal of Electronics and Telecommunications; 2023, 69, 2; 407--413
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Mathematical model parameter estimation of a generating unit operating in the Polish National Power System

Autorzy:

Majka, Ł.
Paszek, S.

Powiązania:

https://bibliotekanauki.pl/articles/199982.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

power system
generating unit
optimization
study of dynamic models
system zasilania
optymalizacja
badanie modeli dynamicznych

Opis:

In the paper, a method and results of parameter estimation of the mathematical model of a generating unit operating in the Polish National Power System are presented. Computations of the parameters were carried out based on measurement and simulation of dynamic waveforms of selected quantities of the generating unit. The problem of parameter identification was brought to minimization of the objective function determined by the vector of deviations between the approximated and approximating waveforms computed on the basis of the models expressed by the searched parameters. A hybrid optimization algorithm, being a serial combination of genetic and gradient algorithms, was used for minimization of the objective function. A methodology for filtering the recorded measurement signals is proposed in the paper. Method and results calculation of the sensitivity to changes of the model parameters of selected dynamic waveforms are also presented.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 2; 409-416
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Construction of a dynamic model for a transverse flux motor
Modelowanie i symulacja stanów dynamicznych silnika TFM

Autorzy:

Kowol, M.
Kołodziej, J.

Powiązania:

https://bibliotekanauki.pl/articles/159333.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki

Tematy:

modelowanie dynamiczne
silnik TFM
silnik elektryczny
optymalizacja matematyczna
dynamic modelling
transverse flux motor
mathematical optimization

Opis:

The paper presents the simulation results of the modular reluctance motor (Transverse Flux Motor) with an outer rotor in different transient states. The main goal of the analysis was the developing process of a mathematical TFM model with a high level of accordance with real object. The mathematical model was implemented in Matlab/Simulink environment and compared with the filed-circuit model (FLUX3D). Several computer simulations were carried out for different TFM motor operating conditions.
Praca zawiera wyniki badań symulacyjnych stanów dynamicznych silnika reluktancyjnego o budowie modułowej z wirnikiem zewnętrznym ze strumieniem poprzecznym (TFM). Silnik zbudowany jest z trzech modułów oddzielonych od siebie przekładkami dystansowymi, każdy z modułów zawiera 12 zębów oraz jedno uzwojenie (rys. 1). Poszczególne moduły wirnika przesunięte są względem siebie o dziesięć stopni mechanicznych, natomiast moduły stojana są ułożone symetrycznie względem siebie. Do zasilania w/w silnika zastosowano układ półmostkowy typu "H", składający się z sześciu tranzystorów i diod zwrotnych. Zasadniczym celem badań było opracowanie modelu matematycznego silnika TFM zapewniającego dobre odzwierciedlenie zjawisk występujących w tego rodzaju napędach elektrycznych. Model matematyczny zaimplementowano w środowisku Matlab/Simulink, oraz Tolboox PLECS do zamodelowania układu zasilania. Nieliniowość strumienia magnetycznego zależnego od prądu i położenia kątowego uwzględniono stosując w modelu matematycznym funkcję ψ= f ( i,Θ ) (rys. 4a). Podobne podejście zastosowano w przypadku momentu elektromagnetycznego wyznaczając funkcję T = f ( i,Θ ). Funkcje te wyznaczono w na drodze obliczeń polowych zweryfikowanych pomiarowo. Struktura modelu symulacyjnego ma charakter hierarchiczny. Składa się z podsystemów każdego z pasm (rys. 5), układu zasilania i sterowania (rys. 6) oraz z bloku implementacji wielkości mechanicznych (rys. 7). W punkcie 4 zamieszczono wykresy będące porównaniem badań symulacyjnych przy użyciu modelu matematycznego (Matlab/Simulink) oraz obarczonego dużymi nakładami obliczeniowymi modelu polowoobwodowego (FLUX3D). Na rysunku 8 (a-e) przedstawiono jałowy rozruch silnika TFM przy obniżonym napięciu zasilania. Rysunek 9 (a-c) obrazuje rozruch pod obciążeniem dla znamionowej wartości napięcia zasilania. Porównanie modelu matematycznego z modelem polowo-obwodowym pozwala na wyciągnięcie wniosku o zadowalającej dokładności modelu matematycznego. Otrzymano szereg charakterystyk dla różnych warunków pracy silnika TFM w znacznie krótszym czasie niż dla obliczeń polowo-obwodowych. Opracowane narzędzie umożliwi dalsze, bardziej zaawansowane badania optymalizacyjne z wykorzystaniem metod stochastycznych poszukiwania rozwiązań danego problemu.

Źródło:

Prace Instytutu Elektrotechniki; 2009, 240; 129-139
0032-6216

Pojawia się w:

Prace Instytutu Elektrotechniki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Optimal state estimation and on-line optimisation of a biochemical reactor

Autorzy:

Satya, E.J.
Anand, P.
Venkateswarlu, C.

Powiązania:

https://bibliotekanauki.pl/articles/185784.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

bioprocess monitoring
dynamic simulation
model identification
optimization
control
monitorowanie bioprocesu
symulacja dynamiczna
identyfikacyjny modelu
optymalizacja
kontrola

Opis:

An on-line optimising control strategy involving a two level extended Kalman filter (EKF) for dynamic model identification and a functional conjugate gradient method for determining optimal operating condition is proposed and applied to a biochemical reactor. The optimiser incorporates the identified model and determines the optimal operating condition while maximising the process performance. This strategy is computationally advantageous as it involves separate estimation of states and process parameters in reduced dimensions. In addition to assisting on-line dynamic optimisation, the estimated time varying uncertain process parameter information can also be useful for continuous monitoring of the process. This strategy ensures that the biochemical reactor is operated at the optimal operation while taking care of the disturbances that are encountered during operation. The simulation results demonstrate the usefulness of the two level EKF assisted dynamic optimizer for on-line optimising control of uncertain nonlinear biochemical systems.

Źródło:

Chemical and Process Engineering; 2013, 34, 4; 449-462
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Multi-objective dynamic economic dispatch using Fruit Fly Optimization method

Autorzy:

Arsyad, Haripuddin
Suyuti, Ansar
Said, Sri Mawar
Akil, Yusri Syam

Powiązania:

https://bibliotekanauki.pl/articles/1841297.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

dynamic economic dispatch
Fruit Fly Optimization method
multi-objective
dynamiczna wysyłka ekonomiczna
Metoda optymalizacji muszki owocowej
wielocelowy

Opis:

An essential task of the interconnected power system is about how to optimize power plants during operation time which is known as economic dispatch. In this study, the Fruit Fly Optimization method is proposed to solve problems of dynamic economic dispatch in an electrical power system. To measure the performance of the method, a simulation was conducted for two different electric systems of the existing Sulselbar 150 kV thermal power plant system in Indonesia with two objective functions, namely fuel costs and active power transmission losses, aswell as the 30-bus IEEE standard system with five objective functions namely fuel costs, transmission losses (active and reactive power), a reactive power reserve margin, and an emission index by considering a power generation limit and ramp rates as the constraints. Under tested cases, the simulation results have shown that the Fruit Fly Optimization method can solve the problems of dynamic economic dispatch better than other existing optimization methods. It is indicated by all values of the objective functions that are lowest for the Fruit Fly Optimization method. Moreover, the obtained computational time is sufficiently fast to get the best solution.

Źródło:

Archives of Electrical Engineering; 2021, 70, 2; 351-366
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Shape optimization of thermoviscoelastic contact problems

Autorzy:

Myśliński, A.

Powiązania:

https://bibliotekanauki.pl/articles/970530.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

optymalizacja kształtu
analiza czułości
warunek konieczny optymalności
dynamic thermoviscoelastic contact problem
shape optimization
sensitivity analysis
necessary optimality condition

Opis:

This paper is concerned with a shape optimization problem of a viscoelastic body in unilateral dynamic contact with a rigid foundation. The contact with Coulomb friction is assumed to occur at a portion of the boundary of the body. The nonpenetration condition is described in terms of velocities. The thermal deformation is taken into account. Using the material derivative method as well as the results concerning the regularity of solutions to dynamic variational thermoviscoelastic problem the directional derivative of the cost functional is calculated. A necessary optimality condition is formulated.

Źródło:

Control and Cybernetics; 2003, 32, 3; 611-627
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Metody określania parametrów oświetlenia uzupełniającego dla potrzeb optymalizacji wielokryterialnej budynków mieszkalnych - energochłonność oświetlenia
Determination of PSALI performance for building optimisation - energy efficiency

Autorzy:

Heim, D
Jędrzejuk, H
Szczepańska, E

Powiązania:

https://bibliotekanauki.pl/articles/362589.pdf

Data publikacji:

2010

Wydawca:

Instytut Fizyki Budowli Katarzyna i Piotr Klemm

Tematy:

optymalizacja
oświetlenie uzupełniające
energochłonność
symulacje
wskaźnik TDI
optimization
supplementary lighting
energy intensity
simulations
Trader Dynamic Index
TDI
PSALI

Opis:

W referacie przedstawiono metody symulacyjne służące do określania zapotrzebowania na energię do sztucznego oświetlenia uzupełniającego. Opisano procedurę wyznaczania wskaźnika TDI oraz jego przykładowe wartości. Wyznaczane parametry służą do oceny energochłonności obiektów, a zatem niezbędne jest ich uwzględnienie w wielokryterialnej optymalizacji budynków mieszkalnych, jako jedne z wielu kryteriów decydujących o oddziaływaniu budynków na środowisko. Praca naukowa została częściowo sfinansowana z środków na naukę w latach 2008-11 w ramach Projektu Badawczego Nr 3989/B/T02/2008/35.
The energy performance of supplementary lighting is discussed in a paper. For the purpose of multicriterion optimisation refined TDI index was proposed as an indicator of illuminance level and energy requirements. Additionally, different luminous efficacy of artificial lighting source was presented and discussed. Finally, some criteria of supplementary lighting efficiency was formulated.

Źródło:

Fizyka Budowli w Teorii i Praktyce; 2010, T. 5, nr 4, 4; 5-8
1734-4891

Pojawia się w:

Fizyka Budowli w Teorii i Praktyce

Dostawca treści:

Biblioteka Nauki

/5

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