Search in Publications

Found 6289 publications

Fuzzy signature based model for qualification and ranking of residential buildings

Ádám Bukovics L. T. Kóczy

Publication Name: International Journal for Housing Science and Its Applications

Publication Date: 2013-12-02

Volume: 37

Issue: 4

Page Range: 217-227

Description:

At the end of the 19th and at the beginning of the 20th centuries Budapest the capital of the Hungarian kingdom underwent a significant development. During this period the number of inhabitants of the city multiplied, as a consequence several new city districts were constructed. The functional and structural arrangement of these new residential buildings was very similar in respect of the materials used and the technologies applied. A considerable part of these buildings still constitutes the determining element of the townscape. It is one of the most burning issues of the present day Budapest that a part of these buildings are in very bad condition. Due to the limited financial resources it is an essential task to set up priority ranking of the renovation, upgrading and renewal of buildings with similar arrangement. In our case the traditional (two-valued) logic is unsuitable for modelling or handling the given phenomenon. When describing the status of a load-bearing building structure the terminology of "appropriate condition" cannot be handled by Boolean logic, since it cannot be strictly determined where the borderline is between appropriate or inappropriate condition. In the case of the majority of the linguistic characteristics of this type there is a well noticeable joint element, which expresses a kind of inaccuracy or uncertainty. For such tasks the application of fuzzy signatures is considered to be one of the possible solutions. The fuzzy type inaccuracy somehow links with human thinking. Fuzzy logic is an extension of the two-valued logic, which makes it possible to define transitions, too. By applying the fuzzy singleton signatures a status-determining and ranking model was created, which is suitable for the qualification and ranking of buildings of similar age and structural arrangement. This model was used for the first time on a database, which is based on expert opinions, relating to a given stock of residential building. The modelling of the load-bearing structural condition of the residential buildings is a complicated task, the components where of are well-structured and a hierarchical structure can be built therefrom. Based on the foregoing a tree-structure, necessary for the examination of the load-bearing structures of buildings, has been proposed. In this framework primary and secondary structures were distinguished during the examination, which would be linked with qualification values based on their arrangement, materials and conditions (in accordance with fuzzy logic). The significance of the load-bearing structure of various building elements was taken into account by using relevance weights. For the aggregation of the fuzzy singleton signature the Weighted Relevance Aggregation Operation (WRAO) was used. The aggregate status descriptors, characteristic of the status of a building, provided the basis for the ranking of buildings in case of a certain stock of buildings. Discrepancies of the results achieved by method using membership functions of approximate and fine set of values, conclusions were drawn as to when and which method should be used in practise. The results of this study may make it easier to realize rehabilitation ideas of similar residential areas, and also can be efficiently used during utilization and renewal of certain buildings in bad condition. Copyright © 2013 IAHS.

Open Access: Yes

DOI: DOI not available

Capacitive and hybrid energy storages for metro railcars

I. Szenasy

Publication Name: 2013 IEEE International Electric Vehicle Conference Ievc 2013

Publication Date: 2013-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

In this paper the simulation models by Matlab for an urban-metro railcar and some newer methods for reducing the need value of capacitance for energy storage are presented. The achievable decreasing ratio of the needed energy storage at SCAP is 25 to 40 % with this improved energy control method. It was been investigated the supercapacitor and the Li-ion battery as hybrid energy storage system and its effectiveness under operation of a suitable energy control system. Mass reduction of our hybrid storage system is significant. © 2013 IEEE.

Open Access: Yes

DOI: 10.1109/IEVC.2013.6681139

Az élet természeti alapjainak védelmi rendszerei

Gergely Horváth

Publication Name: Tarsadalomkutatas

Publication Date: 2013-12-01

Volume: 31

Issue: 4

Page Range: 386-402

Description:

Environmental protection, habitat protection, protection of the living world and nature conservation share the same foundations. All these four protective systems make an effort - with an aim of protecting the society - to protect "the natural bases of life", which are threatened by damaging and over-consuming by humankind. The aspect of organisations (subjective side), the special environmental organs make an essential part of the system of protection. Finally, the specific protective device of nature conservation and habitat protection, the zone system of protected areas gets into the focus of the examination, which also can be considered as a complex defensive system of the natural bases of life.

Open Access: Yes

DOI: 10.1556/Tarskut.31.2013.4.6

Performance study of domain decomposition methods for 2D parallel finite element analysis

Miklós Kuczmann Daniel Marcsa

Publication Name: Pollack Periodica

Publication Date: 2013-12-01

Volume: 8

Issue: 3

Page Range: 47-58

Description:

The aim of this paper is to give a unified comparison of non-overlapping domain decomposition methods for solving magnetic field problems. The methods under investigation are the Schur complement method and the Lagrange multiplier based finite element tearing and interconnecting method, and their solvers. The performance of these methods has been investigated in detail for two-dimensional magnetic field problems as case studies.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.3.5

Evaluation of travel behaviors in order to prepare travel plans for residential areas and schools of gyor

Petra Szakonyi Emese Mako

Publication Name: Pollack Periodica

Publication Date: 2013-12-01

Volume: 8

Issue: 3

Page Range: 69-78

Description:

The municipality of Gyor participated in the last five years in two Intelligent Energy Europe projects (Pro Motion project, Travel Plan plus project), which aim was to deliver transport-sector energy savings by creating a new approach to site-based mobility management across Europe. During the development of the two projects there has been worked out two Local Travel Plans, one for the residential area Menfocsanak, in the city, Gyor and one for the educational institutions of Gyor. The first one is a so called 'area travel plan' and the second one is a so-called 'work travel plan'. The aims of these studies were to reduce CO2 emission caused by private car users and to promote sustainable mobility choices for the residents of the area and for students. In order to solve the future mobility challenges in a sustainable way it is necessary to analyze the existing travel demand and modal-split caused by target groups (residents and students).It is important to develop Local Travel Plans for residential areas and schools, based on quantitative travel behavior data, which can be used for modeling of current and future transport to provide optimized solutions for daily mobility. It is very important to collect data from various sources according to the needed detail of a Travel Plan.

Open Access: Yes

DOI: 10.1556/Pollack.8.2013.3.7

New effective MILP models for PFSPs arising from real applications

Tamás Hajba Zoltán Horváth

Publication Name: Central European Journal of Operations Research

Publication Date: 2013-12-01

Volume: 21

Issue: 4

Page Range: 729-744

Description:

Permutation flow shop problems (PFSPs) with makespan minimization that model production lines working in industry often have some special features: they are typically large-scale and the jobs can be sorted into types so that jobs of the same type have equal processing time values at each machine. We define the related R-PFSP, the Permutation with Repetition Flow Shop Problem, which is of less complexity if the number of types is bounded. Moreover, a subproblem set of R-PFSPs, the RL-PFSP is considered too, where only those permutations are in the design space in which subsequent tuples of a certain size contain jobs of the same type. We construct adequate new MILP models for R-PFSPs and RL-PFSPs and investigate their effectiveness experimentally. We demonstrate that via our new MILP models significantly larger problems can be solved than via the classical MILP models. © 2012 Springer-Verlag.

Open Access: Yes

DOI: 10.1007/s10100-012-0263-6

A stochastic model for analyzing the interpretability-accuracy trade-off in interpretable fuzzy systems using nested Hyperball structures

Krisztián Balázs L. T. Kóczy

Publication Name: 8th Conference of the European Society for Fuzzy Logic and Technology Eusflat 2013 Advances in Intelligent Systems Research

Publication Date: 2013-12-01

Volume: 32

Issue: Unknown

Page Range: 72-79

Description:

Our recent work proposed a new meaning preservation approach together with a parameterizable nested hyperball structured search space for interpretable fuzzy systems in order to solve a problem of inconsistency observed in conventional interpretable fuzzy knowledge bases and simultaneously to address the adjustment of the trade-off between interpretability and accuracy. Based on intuitive reasonings and simulation results a conjecture was formulated about favorable trade-off adjustment properties of the proposed method. The aim of the present paper is to construct a mathematical model, in which the conjectured properties can be analyzed and formally verified. Some computational considerations about the interpretation of the resulting knowledge bases are also made. © 2013. The authors -Published by Atlantis Press.

Open Access: Yes

DOI: DOI not available

A stochastic model for analyzing the interpretability-accuracy trade-off in interpretable fuzzy systems using nested Hyperball structures

No authors available

Publication Name: 8th Conference of the European Society for Fuzzy Logic and Technology, EUSFLAT 2013 - Advances in Intelligent Systems Research

Publication Date: 2013-12-01

Volume: 32

Issue:

Page Range: 72-79

Description:

Our recent work proposed a new meaning preservation approach together with a parameterizable nested hyperball structured search space for interpretable fuzzy systems in order to solve a problem of inconsistency observed in conventional interpretable fuzzy knowledge bases and simultaneously to address the adjustment of the trade-off between interpretability and accuracy. Based on intuitive reasonings and simulation results a conjecture was formulated about favorable trade-off adjustment properties of the proposed method. The aim of the present paper is to construct a mathematical model, in which the conjectured properties can be analyzed and formally verified. Some computational considerations about the interpretation of the resulting knowledge bases are also made. © 2013. The authors -Published by Atlantis Press.

Open Access: No

DOI: DOI not available

Doctoral symposium on recent advances in information technology

No authors available

Publication Name: 2013 Federated Conference on Computer Science and Information Systems, FedCSIS 2013

Publication Date: 2013-12-01

Volume:

Issue:

Page Range: 637

Description:

Open Access: No

DOI: DOI not available