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Wyświetlanie 1-15 z 17
Tytuł:
Knowledge base development for assembly planning using evidence theory
Autorzy:
Kutschenreiter-Praszkiewicz, Izabela
Matuszny, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2086279.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
assembly
evidence theory
tools selection
Opis:
This paper presents an approach to assembly planning in the early phase of product development. The product specification, workstation, environment, equipment and tools are not fully known in the early stage of product development. When comparing product variants at this stage there is a lack of data that affects the efficiency of the manufacturing process. It is therefore necessary to apply methods useful in processing incomplete and uncertain data. The main indicator which helps in comparing different product variants is manufacturing time standard. This papier is focused on assembly tool selection which is one of important data influenced assembly time. Based on the proposed algorithm and case study, a tool selection method using a decision tree induced from a training set with reduced uncertainty is presented.
Źródło:
Journal of Machine Engineering; 2022, 22, 2; 125--137
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rough membership functions: a tool for reasoning with uncertainty
Autorzy:
Pawlak, Z.
Skowron, A.
Powiązania:
https://bibliotekanauki.pl/articles/1361085.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
evidence theory
rough sets
reasoning with incomplete information
fuzzy sets
Opis:
A variety of numerical approaches for reasoning with uncertainty have been investigated in the literature. We propose rough membership functions, rm-functions for short, as a basis for such reasoning. These functions have values in the interval [0,1] and are computable on the basis of the observable information about the objects rather than on the objects themselves. We investigate properties of the rm-functions. In particular, we show that our approach is intensional with respect to the class of all information systems [P91]. As a consequence we point out some differences between the rm-functions and the fuzzy membership functions [Z65], e.g. the rm-function values for X ∪ Y (X ∩ Y) cannot be computed in general by applying the operation max(min) to the rm-function values for X and Y.
Źródło:
Banach Center Publications; 1993, 28, 1; 135-150
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problem wykrycia i problem pokrycia
Problem of detecting objects and of covering an area
Autorzy:
Filipowicz, W.
Neumann, T.
Powiązania:
https://bibliotekanauki.pl/articles/360375.pdf
Data publikacji:
2008
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
matematyczna teoria ewidencji
fuzja danych nawigacyjnych
mathematical evidence theory
navigational data fusion
Opis:
Radar jest przykładem urządzenia nawigacyjnego, za pomocą którego możliwe jest monitorowanie obszarów wodnych. Charakteryzuje się on, jak każde urządzenie techniczne, pewnym ograniczonym poziomem funkcjonalności oraz niezawodności. Rozmieszczenie stacji obserwacyjnych w taki sposób, aby prawdopodobieństwo wykrycia dowolnego obiektu w dowolnym miejscu było większe od zadanej wartości progowej, jest zadaniem optymalizacyjnym. Sformułowanie oraz metoda rozwiązania powyższego zadania zostały przedstawione w prezentowanym artykule.
The radar is an example of a navigational device which enables monitoring of the sea areas. As every technical device, it is characterized by a certain limited level of functionality and reliability. Arranging observation stations so that plausibility of detecting any object at any place is greater than the threshold value is an operational research task. Formulation of the problem and the methods for solving it are presented in the paper.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2008, 13 (85); 10-14
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grid Fault Diagnosis Based on Information Entropy and Multi-source Information Fusion
Autorzy:
Zeng, Xin
Xiong, Xingzhong
Luo, Zhongqiang
Powiązania:
https://bibliotekanauki.pl/articles/1844639.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
information entropy
Bayesian network
multi-source information fusion
D-S evidence theory
fault diagnosis
Opis:
In order to solve the problem of misjudgment caused by the traditional power grid fault diagnosis methods, a new fusion diagnosis method is proposed based on the theory of multi-source information fusion. In this method, the fault degree of the power element is deduced by using the Bayesian network. Then, the time-domain singular spectrum entropy, frequency-domain power spectrum entropy and wavelet packet energy spectrum entropy of the electrical signals of each circuit after the failure are extracted, and these three characteristic quantities are taken as the fault support degree of the power components. Finally, the four fault degrees are normalized and classified as four evidence bodies in the D-S evidence theory for multi-feature fusion, which reduces the uncertainty brought by a single feature body. Simulation results show that the proposed method can obtain more reliable diagnosis results compared with the traditional methods.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 143-148
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating Models of Relational Competence Theory
Autorzy:
L‛Abate, Luciano
Powiązania:
https://bibliotekanauki.pl/articles/637095.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
evidence, method, models, validation, theory, writing
Opis:
The purpose of this article is to summarize methods used to evaluate the 16 Models of Relational Competence Theory (RCT). Methods to verify the validity and usefulness of these Models must take into account how these models are interrelated. This interrelatedness allows to evaluate participants with single and multi-function statically objective self-report, paper-and--pencil tests. Psychological interventions occur dynamically and systematically through workbooks, written, interactive practice exercises, administered to participants at a distance. Workbooks were developed from theory-derived, theory-related, or theory-independent sources and objective tests and measures, thus combining and matching evaluation with intervention in ways that would be diffi cult if not impossible to accomplish verbally in face-to-face psychotherapy.
Źródło:
Psychologia Rozwojowa; 2010, 15, 2
1895-6297
2084-3879
Pojawia się w:
Psychologia Rozwojowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Rapid Monitoring Method for Natural Gas Safety Monitoring
Autorzy:
Li, Rongli
Fan, Yuexin
Powiązania:
https://bibliotekanauki.pl/articles/1844534.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
trend judgment
CUSUM
Dempster-Shafer evidence theory
Gauss-Newton nonlinear fitting
fast alarm monitoring
concentration prediction
Opis:
The quick leakage alarm and the accurate concentration prediction are two important aspects of natural gas safety monitoring. In this paper, a rapid monitoring method of sensor data sharing, rapid leakage alarm and simultaneous output of concentrations prediction is proposed to accelerate the alarm speed and predict the possible impact of leakage. In this method, the Dempster-Shafer evidence theory is used to fuse the trend judgment and the CUSUM (cumulative sum) and the Gauss-Newton iteration is used to predict the concentration. The experiment system based on the TGS2611 natural gas sensor was built. The results show that the fusion method is significantly better than the single monitoring method. The alarm time of fusion method was more advanced than that of the CUSUM method and the trend method (being averagely, 10.4% and 7.6% in advance in the CUSUM method and the trend method respectively). The relative deviations of the predicted concentration were the maximum (13.3%) at 2000 ppm (parts per million) and the minimum (0.8%) at 6000 ppm, respectively.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 3; 325-330
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Approach Towards Position Fixing
Autorzy:
Filipowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/320811.pdf
Data publikacji:
2010
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
position fixing
mathematical theory of evidence
fuzzy reasoning
Opis:
Navigation aids indications, measured distances and bearings are random values governed by various distributions, normal characteristic is widely assumed. Navigation handbooks read that mean error of bearing taken with radar is within a given range, distance error is within certain percentage of an obtained value. It is also known that measurements taken to different landmarks can be subjectively evaluated therefore diversified. All the mentioned factors are to be taken into account once vessel position is being fixed. In order to include them into a calculation scheme one has to engage new ideas and use different approaches. Mathematical Theory of Evidence extended for fuzzy environment proved to be universal platform for wide variety of new solutions in navigation.
Źródło:
Annual of Navigation; 2010, 16; 41-53
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Nautical Observation Errors Evaluation
Autorzy:
Filipowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/117354.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Nautical Observation
Navigational Method
mathematical theory of evidence (MTE)
Errors Evaluation
Observation Errors Evaluation
Plausibility
Systematic Errors Identificatio
Navigational Evidence
Opis:
Mathematical Theory of Evidence (MTE) enables upgrading models and solving crucial problems in many disciplines. MTE delivers new unique opportunity once one engages possibilistic concept. Since fuzziness is widely perceived as something that enables encoding knowledge thus models build upon fuzzy platforms accepts ones skill within given field. At the same time evidence combining scheme is a mechanism enabling enrichment initial data informative context. Therefore it can be exploited in many cases where uncertainty and lack of precision prevail. In nautical applications, for example, it can be used in order to handle data feature systematic and random deflections. Theoretical background was discussed and computer application was successfully implemented in order to cope with erroneous and uncertain data. Output of the application resulted in making a fix and a posteriori evaluating its quality. It was also proven that it can be useful for calibrating measurement appliances. Unique feature of the combination scheme proven by the author in his previous paper, enables identifying measurement systematic deflection. Based on the theorem the paper aims at further exploration of practical aspects of the problem. It concentrates on reduction of hypothesis frame reduction and random along with systematic errors identifications.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 4; 545-550
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Application of Mathematical Theory of Evidence in Navigation
Autorzy:
Filipowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/116718.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
mathematical theory of evidence (MTE)
MTE in Navigation
marine navigation
Dempster-Shafer theory
Probability Assignment
Fuzzy Values
Uncertainty
Belief Structures
Opis:
Plenty of various quality data are available to the officer of watch. The data of various qualities comes from different navigational aids. This kind of data creates new challenge regarding information association. The challenge is met by Mathematical Theory of Evidence. The theory delivers methods enabling combination of various sources of data. Results of association have informative context increased. Associated data enable the navigator to refine his position and his status regarding dangerous places. The procedure involves uncertainty, ambiguity and vague evidence. Imprecise and incomplete evidence can be combined using extended Dempster-Shafer reasoning scheme.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 423-430
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jednoczesna ocena informacji ilościowej i jakościowej podczas wspomagania diagnostyki medycznej
Simultaneous estimation of quantity and quality information in medical diagnosis support
Autorzy:
Straszecka, E.
Powiązania:
https://bibliotekanauki.pl/articles/154309.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wspomaganie diagnozy medycznej
zbiory rozmyte
teoria Dempstera-Shafera
medical diagnosis support
fuzzy sets
Dempster-Schafer theory of evidence
Opis:
Diagnoza medyczna bazuje na niepełnej i nieprecyzyjnej informacji, dlatego algorytmy wspomagania wnioskowania medycznego muszą spełniać specyficzne wymagania. Praca koncentruje się na jednoczesnej i równoważnej ocenie parametrów medycznych rozmaitej natury: mierzalnych (np. testy laboratoryjne), formułowanych ściśle (ciąża), określanych nieprecyzyjnie (przyrost wagi), a czasem definiowanych w umownej skali (ból). Proponuje się modelowanie wnioskowania medycznego z zastosowaniem teorii Dempstera-Shafera rozszerzonej poprzez zdefiniowanie rozmytych elementów ogniskowych. Pozwala to na reprezentację wiedzy w postaci reguł. W przesłankach tych reguł mogą występować zarówno zmienne ilościowe, jak i jakościowe. Każdej regule jest przypisana wartość bazowego prawdopodobiestwa zdefiniowanego zgodnie z teorią Dempstera-Shafera. Funkcje przynależności charakteryzujące zmienne w przesłankach reguł oraz rozkładu bazowego prawdopodobieństwa można wyznaczyć na podstawie danych uczących. Wniosek diagnostyczny jest wynikiem porównania wartości miar przekonania (Bel) dla kilku hipotez. Przedstawiony model wnioskowania został zweryfikowany się dla 3 niezależnych baz danych dotyczących chorób tarczycy.
Medical diagnosis is based on uncertain and imprecise information. Therefore, algorithms that support medical inference comply with specific requirements. This paper is focused on simultaneous and equal estimation of medical parameters of different nature: measurable (like laboratory tests), precisely formulated (pregnancy), described in an imprecise way (putting on weight), or defined on an assumed scale (pain). It is suggested to model a medical inference in the framework of the Dempster-Shafer theory extended for fuzzy focal elements. By means of the proposed algorithm, diagnostic rules can be formulated. Premises of the rules may include both quantity and quality variables. Each rule is assigned with a value of the basic probability assignment that is defined according to the Dempster-Shafer theory. Membership functions of rule predicates as well as the basic probability assignment are found from training data. The diagnostic conclusion is formulated after a comparison of belief values for several hypotheses. The model of inference is verified for 3 independent data bases of thyroid gland diseases.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 372-375
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vessels Route Planning Problem with Uncertain Data
Autorzy:
Neumann, T.
Powiązania:
https://bibliotekanauki.pl/articles/115957.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
maritime-related data
route planning
dempster-shafer theory (DST)
vessels route planning
Dijkstra's algorithm
decision rules
mathematical theory of evidence
uncertain data
Opis:
The purpose of this paper is to find a solution for route planning in a transport networks, where the costs of tracks, factor of safety and travel time are ambiguous. This approach is based on the Dempster-Shafer theory and well known Dijkstra's algorithm. In this approach important are the influencing factors of the mentioned coefficients using uncertain possibilities presented by probability intervals. Based on these intervals the quality intervals of each route can be determined. Applied decision rules can be described by the end user.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 459-464
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychologist at university, in practice and among people – methodological, cultural and ethical determinants
Autorzy:
Brzeziński, Jerzy Marian
Powiązania:
https://bibliotekanauki.pl/articles/703729.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
psychology
university
laboratory experiment
field experiment
psychological theory
evidence-based assessment
evidence-based practice in psychology
methodology
ethics
Opis:
In the article the author discusses peculiarities of three areas of psychologists’ professional activity: conducting scientific research, educating new generations of psychologists, and having a private practice. He particularly stresses the significance of empirical testability of theories for correct and ethical assessment practice (according to Evidence-Based Assessment standard) and therapeutic practice (according to Evidence-Based Practice in Psychology standard). The author also explores the cultural immersion of psychological activity.
Źródło:
Nauka; 2018, 1
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jerzy Topolski’s Theory of Historical Narrative. On the Trail of Professor’s Last Lost Boo
Autorzy:
Pomorski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/20312032.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Jerzy Topolski
theory of historical narrative
hermeneutic analysis of the historiographic evidence
Opis:
The paper examines the special historiographic evidence: the lost last book of the well‑known Polish historian and methodologist Professor Jerzy Topolski entitled “New Methodology of History”. Only its working outline in the form of an extensive table of contents has survived, but this does not prevent the author from making interesting hypotheses as to its meaning.
Źródło:
Historyka studia metodologiczne; 2021, 51, Spec. iss.; 167-193
0073-277X
Pojawia się w:
Historyka studia metodologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fundamentals of the Dempster-Shafer theory and its applications to system safety and reliability modelling
Autorzy:
Rakowsky, U. K.
Powiązania:
https://bibliotekanauki.pl/articles/2069603.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
Dempster-Shafer theory
evidence
uncertainty
expert assessment
event tree analysis
fault tree analysis
Opis:
The Dempster-Shafter Theory is well-known for its usefulness to express uncertain judgments of experts. This contribution shows how to apply the calculus to safety and reliability modelling, especially to expert judgement; Failure Modes, Effects, and Criticality Analysis; Event Tree Analysis, Fault Tree Analysis, and Reliability Centred Maintenance. Including a tutorial introduction to the Dempster-Shafer Theory, the differences between the Probability and the Dempster-Shafer Theory are discussed widely.
Źródło:
Journal of Polish Safety and Reliability Association; 2007, 2; 283--295
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prawda i pewność jako węzłowe kategorie epistemologii Jamie L. Balmesa
The Truth and Certainty as Nodal Categories in Jaime L. Balmes’ Epistemology
Autorzy:
Tupikowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2012916.pdf
Data publikacji:
2010
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
prawda
pewność
teoria poznania
oczywistość
Bóg
truth
certainty
theory of knowledge
self-evidence
God
Opis:
In Balmes’ philosophical thought a significant – it seems – co-dependence is revealed, a peculiar logic of consequence that is sketched already in the starting point of his eclectic philosophy. First it is being given in purely common-sense, popular cognition (it is not quite the realism that is presented by St Thomas Aquinas, although Balmes clearly sympathizes with him). From this common-sense background (which is the influence of Reid’s thought) Balmes’ epistemology stems (here, in turn, Cartesian and Leibnitzian origins of his thought are revealed), whose foundation is not consistently realistic, either, and it rather tends towards philosophy of consciousness (philosophy of the subject). And finally, a significant role is played here by Balmes’ concept of the truth – ontic (the concept of being) and logical (epistemology). His discourse is unified by the concept of God as the first Cause of beings, the ultimate source of clarity and certainty of cognition, the ultimate justification (objective and subjective) of the obviousness of the truth, and in the end – the aim, to which the world of things and persons is heading. So, the basic categories of Balmes’ whole neo-scholastic epistemology are “the existence of God” as, in fact, the only guarantee of the truth and certainty, and “human consciousness” as a necessary condition of the possibility to recognize various types of obviousness. 
Źródło:
Roczniki Filozoficzne; 2010, 58, 1; 263-279
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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