Wyniki wyszukiwania - BazTech

1

A neural network for monitoring and characterization of buildings

Romańska-Zapała Anna, Dudzik Marek, Kuc Sabina

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

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2023

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Nr 4

134--143

EN

This paper continues work from part 1 where a high precision estimator for energy efficiency and indoor environment based on artificial neural networks (ANN) was examined. Part 1 demonstrated that creating a precise representation of a mathematical relationship one must evaluate the stability and fitness under randomly changing initial conditions. Now, we extend our requirements for the model to be rapid and precise. At the end of this work we obtain a road map for the design and evaluation of ANN-based estimators of the given performance aspect in a complex interacting environment. This paper also shows that ANN system designed may have a high precision in characterizing the response of the building exposed to variable outdoor climatic conditions. The absolute value of the relative errors, MaxAR, is less than 2%. It proves that monitoring and ANN-based characterization approach can be used for different buildings, including those with the best environmental performance.

2

Estimation of the angular position of a two–wheeled balancing robot using a real IMU with selected filters

Laddach Krzysztof, Łangowski Rafał, Zubowicz Tomasz

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2022

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Vol. 70, nr 2

art. no. e140518

EN

A low–cost measurement system using filtering of measurements for two–wheeled balancing robot stabilisation purposes has been addressed in this paper. In particular, a measurement system based on gyroscope, accelerometer, and encoder has been considered. The measurements have been corrected for deterministic disturbances and then filtered with Kalman, a–b type, and complementary filters. A quantitative assessment of selected filters has been given. As a result, the complete structure of a measurement system has been obtained. The performance of the proposed measurement system has been validated experimentally by using a dedicated research rig.

3

Problemy z oszacowaniem nośności drewnianych stropów w starych budynkach

Hebda Lesław

Materiały Budowlane

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2020

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nr 11

25--27

4

Prediction of suspended sediment loading by means of hybrid artificial intelligence approaches

Yilmaz Banu, Aras Egemen, Kankal Murat, Nacar Sinan

Acta Geophysica

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2019

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Vol. 67, no. 6

1693--1705

EN

The main aim of the research is to use the artificial neural network (ANN) model with the artificial bee colony (ABC) and teaching–learning-based optimization (TLBO) algorithms for estimating suspended sediment loading. The stream flow per month and SSL data obtained from two stations, İnanlı and Altınsu, in Çoruh River Basin of Turkey were taken as precedent. While stream flow and previous SSL were used as input parameters, only SSL data were used as output parameters for all models. The successes of the ANN-ABC and ANN-TLBO models that were developed in the research were contrasted with performance of conventional ANN model trained by BP (back-propagation). In addition to these algorithms, linear regression method was applied and compared with others. Root-mean-square and mean absolute error were used as success assessing criteria for model accuracy. When the overall situation is evaluated according to errors of the testing datasets, it was found that ANN-ABC and ANN-TLBO algorithms are more outstanding than conventional ANN model trained by BP.

5

E-Assessment Tools for Programming Languages: A Review

Gupta S., Gupta A.

Annals of Computer Science and Information Systems

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2018

|

Vol. 14

65--70

EN

Continuous Evaluation and feedback not only helps in improving learning of a student, but also acts as a constant motivator to put in more efforts. But then, feedback and assessment are very difficult and time consuming in practice. Thus, automating the entire system of assessment, evaluation and feedback will be highly beneficial. But, building such tools for all courses is yet not feasible. However, e-assessment tools for programming courses in Computer Science discipline can be developed. In this paper, we review various grading techniques used by these tools to assess a student's programming assignment. Further, this paper discusses various types and features of tools according to which an appropriate tool should be selected. And, in the end, we will be highlighting the extent to which students and instructors are actually benefited by these tools.

6

Methods of position estimation in parametric navigation

Banachowicz A., Wolski A.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2017

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z. 95

19--25

EN

The estimation of position coordinates of a navigating ship is one of the navigational subprocesses. The methods used in this process are either deterministic (the case of a minimum number of navigational parameters measurements) or probabilistic (in cases where we have access to information redundancy). Naturally, due to the accuracy and reliability of the calculated coordinates, probabilistic methods should be primarily used. The article presents the use of the method of least squares and Kalman filtering in algorithms in integrated navigation for the estimation of position coordinates, taking into account ship movement parameters.

7

Determining an estimate of an equivalence relation for moderate and large sized sets

Klukowski L.

Operations Research and Decisions

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2017

|

Vol. 27, No. 2

45--58

EN

This paper presents two approaches to determining estimates of an equivalence relation on the basis of pairwise comparisons with random errors. Obtaining such an estimate requires the solution of a discrete programming problem which minimizes the sum of the differences between the form of the relation and the comparisons. The problem is NP hard and can be solved with the use of exact algorithms for sets of moderate size, i.e. about 50 elements. In the case of larger sets, i.e. at least 200 comparisons for each element, it is necessary to apply heuristic algorithms. The paper presents results (a statistical preprocessing), which enable us to determine the optimal or a near-optimal solution with acceptable computational cost. They include: the development of a statistical procedure producing comparisons with low probabilities of errors and a heuristic algorithm based on such comparisons. The proposed approach guarantees the applicability of such estimators for any size of set.

8

Services of surface water ecosystems in relations to water usage for irrigation of agricultural land

Rauba E.

Ekonomia i Środowisko

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2017

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nr 4

143--155

EN

One of the areas using the supply function of surface water ecosystems is agriculture. In the case of a lack of a sufficient amount of water for plants, it is necessary to supplement this amount through irrigation of agricultural land i.e. using the ecosystem service – water collection. The aim of this article is to determine the surface water ecosystem services connected to water collection for irrigation of agricultural land in the area of Podlaskie voivodship and to present a method for estimating the requirements for such services as a tool for water management within municipalities.

9

Global tungsten demand and supply forecast

Dvoracek J., Sousedikova R., Vratny T., Jurekova Z.

Archives of Mining Sciences

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2017

|

Vol. 62, no. 1

3--12

EN

An estimate of the world tungsten demand and supply until 2018 has been made. The figures were obtained by extrapolating from past trends of tungsten production from1905, and its demand from 1964. In addition, estimate suggestions of major production and investment companies were taken into account with regard to implementations of new projects for mining of tungsten or possible termination of its standing extraction. It can be assumed that tungsten supply will match demand by 2018. This suggestion is conditioned by successful implementation of new tungsten extraction projects, and full application of tungsten recycling methods.

PL

Zaprezentowano szacunkową prognozę światowego popytu i podaży wolframu w roku 2018. Wartości liczbowe otrzymano poprzez ekstrapolację wielkości charakteryzujących trendy w produkcji wolframu od roku 1905 oraz trendy w zakresie popytu licząc od roku 1964. Ponadto, podano szacunkowe dane o wielkości produkcji, wzięto także pod uwagę firmy inwestujące w tym obszarze, uwzględniając realizacje nowych inwestycji w dziedzinie produkcji wolframu oraz możliwe zakończenie wydobycia. Przyjmuje się, że podaż wolframu roku 2018 zrównoważy popyt. Założenie to uwarunkowane jest zakończeniem realizacji nowych inwestycji w dziedzinie wydobycia oraz zastosowaniem na pełną skalę działań mających na celu recykling i odzysk wolframu.

10

More statistical tools for maximum possible earthquake magnitude estimation

Vermeulen P., Kijko A.

Acta Geophysica

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2017

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Vol. 65, no. 4

579--587

EN

In this paper, we introduce additional statistical tools for estimating the maximum regional earthquake magnitude, mmax, as complement to those already introduced by Kijko and Singh (Acta Geophys. 59(4):674– 700, 2011). Four new methods are introduced and investigated, with regard to their applicability and performance. We present an example of application and a comparison that includes the methods introduced earlier by the previous authors. A condition for the existence of the Tate– Pisarenko estimate and a proof of the asymptotic equivalence of the Tate–Pisarenko and Kijko–Sellevoll estimates are presented in the two appendices

11

Oszacowanie osiadań ław i stóp fundamentowych przy pełnym wykorzystaniu nośności obliczeniowej podłoża według PN-EN 1997-1

Garwacka-Piórkowska S.

Inżynieria i Budownictwo

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2016

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R. 72, nr 7

372--374

PL

Podano wyniki obliczeń osiadania stóp i ław fundamentowych posadowionych bezpośrednio na najczęściej spotykanych w praktyce budowlanej gruntach, przy obciążeniu odpowiadającym nośności obliczeniowej podłoża. Stwierdzono, że obliczone osiadania mogą przekraczać osiadania graniczne w przypadku fundamentów o dużych wymiarach, przy występowaniu pod nimi piasków średnich, grubych i żwirów.

EN

The article attempts to determine whether the settlement of typical direct foundations (strip foundations and spot footings), situated on the most commonly encountered in practice soils, with a load corresponding with calculated bearing capacity of the ground, are compatible with norm requirements. The calculations have shown that they can exceed smax for the foundations with large dimensions, in case of non-cohesive soils beneath them: sand medium, coarse and gravel.

12

Order estimation of japanese paragraphs by supervised machine learning and various textual features

Murata M., Ito S., Tokuhisa M., Ma Q.

Journal of Artificial Intelligence and Soft Computing Research

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2015

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Vol. 5, No. 4

247--255

EN

In this paper, we propose a method to estimate the order of paragraphs by supervised machine learning. We use a support vector machine (SVM) for supervised machine learning. The estimation of paragraph order is useful for sentence generation and sentence correction. The proposed method obtained a high accuracy (0.84) in the order estimation experiments of the first two paragraphs of an article. In addition, it obtained a higher accuracy than the baseline method in the experiments using two paragraphs of an article. We performed feature analysis and we found that adnominals, conjunctions, and dates were effective for the order estimation of the first two paragraphs, and the ratio of new words and the similarity between the preceding paragraphs and an estimated paragraph were effective for the order estimation of all pairs of paragraphs.

13

The creation of “questions bank” and introduction of 2.0. Examination session

Filip A., Dragan P.

Information Systems in Management

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2015

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Vol. 4, No. 4

241--250

EN

In the Institute of American Studies and Polish Diaspora Jagiellonian University, with the support of the Distance Learning Centre at the Jagiellonian University was introduced an innovative method of examination based on empowering the students. During the 2014 session, the students were invited to create test questions. Accepted by the lecturer questions were used on the exam. Extensive “Questions Bank” may be used in subsequent examinations 2.0. The authors of the paper present practical advice on how to prepare and carry out such an examination. They share know how of practical suggestions from pedagogical to technical aspect of moving from teaching to learning while using the idea of Questions Bank. They discuss the impact on the motivation and creativity of students, the principles of achievement and assessment, methods of verifying the content of the questions and technical measures to make questions and hindering cheating. The use of innovative methods of preparing and conducting the exam based on the Questions Bank had a positive impact on the mobilization and involvement of students, which resulted in a very good performance evaluation questionnaires of the lecturer.

14

Approximated fast estimator for the shape parameter of generalized Gaussian distribution for a small sample size

Krupiński R.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2015

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Vol. 63, nr 2

405--411

EN

Most estimators of the shape parameter of generalized Gaussian distribution (GGD) assume asymptotic case when there is available infinite number of observations, but in the real case, there is only available a set of limited size. The most popular estimator for the shape parameter, i.e., the maximum likelihood (ML) method, has a larger variance with a decreasing sample size. A very high value of variance for a very small sample size makes this estimation method very inaccurate. A new fast approximated method based on the standardized moment to overcome this limitation is introduced in the article. The relative mean square error (RMSE) was plotted for the range 0.3-3 of the shape parameter for comparison with other methods. The method does not require any root finding, any long look-up table or multi step approach, therefore it is suitable for real-time data processing.

15

Analiza funkcjonowania systemu kanban w przedsiębiorstwie produkcyjnym

Dziekoński K., Czepiel P.

Zarządzanie Przedsiębiorstwem

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2014

|

Vol. 17, nr 1

26--30

EN

Paper presents an assessment of the functioning of the production control system in a manufacturing company. The assessment was based on the perception of the employees. In the opinion of the surveyed employees kanban has had a positive impact on their work and the company’s operations. Kanban removed out recognized by the management problems contributing to a reduction in inventory levels, increase in production flow, eliminating downtime and reducing the time of production flows and increase the timeliness of orders. In addition, production workers declared kanban’s positive impact on their work by simplifying their operation and ensure .order. through a clear definition of the aim.

16

Oszacowanie popytu na podróże komunikacją miejską mieszkańców małych miast Ukrainy

Liubyi Y., Horbachov P., Naumov V.

Logistyka

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2014

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nr 6

PL

Przez autorów została opracowana metoda badań podróży pasażerów, która pozwala uzyskać adekwatną informację o zapotrzebowaniach mieszkańców małych miast w przemieszczeniach. Wykorzystanie tej metody pozwoliło na oszacowane macierzy podróży rzeczywistych dla miast Swierdłowsk, Kupiańsk i Bałakleja (Ukraina). W sposób eksperymentalny pokazano niezgodność syntetycznych macierzy podróży z rzeczywistym popytem mieszkańców małych miast na przemieszczania się. W ramach koncepcji interwałowej do modelowania popytu na podróży opracowana została metoda oszacowania macierzy podróży, która opiera się na wyniki kompleksowych badań potoków pasażerów w małych miastach. Ona pozwala więcej niż 10 razy skrócić interwał możliwych stanów popytu pasażerów na przemieszczania się, osiągnąć pełnej zgodności wartości oszacowanych i rzeczywistych dla wielkości przewozów pasażerów komunikacją miejską i zapewnić wiarygodną ocenę wyników planowania transportowego w małych miastach.

EN

The authors have developed the method for study of passengers’ travels, which allow obtaining of the adequate information on needs in travels of small cities residents. The use of this method allowed estimation of actual trip matrices for Sverdlovsk, Kupiansk and Balakleya (Ukraine). In experimental way the incompatibility of synthetic trip matrices and actual demand of small cities residents on traveling has been shown. In bounds of interval concept for modeling of travel demand the method was developed for estimation of trip matrices, which is based on the results of complex researches of passengers’ flows in the small cities. This method allows reducing on more than 10 times of interval of possible states of passengers’ demand on travelling. Also it allows achieving of full compatibility of estimated and actual values of public transport passengers volumes, as well as providing the reliable assessment of transport planning results in small cities.

17

Czynniki wpływające na oszacowanie dopuszczalnej wysokości ssania pomp

Polanowski S.

Logistyka

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2014

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nr 6

1070--1074, CD 2

PL

W artykule dokonano analizy przeglądu problemu interpretacji wysokości ssania pomp oraz problemu powstawania zjawisk kawitacji i wiru powietrznego na ssaniu pomp. Pokazano, że w wielu przypadkach w literaturze dydaktycznej występuje nieprawidłowa interpretacja wysokości ssania, pompy, prowadząca do pominięcia (zerowania) ciśnienia dynamicznego. Pokazano, że zmianie uległ także poziom odniesienia geometrycznej wysokości ssania pomp nie do króćca ssawnego pompy, lecz do środka wirnika pompy . Omówiono pojęcie liczby antykawitacyjnej oraz jej rolę w zapobieganiu możliwości powstawania kawitacji. We współczesnej literaturze technicznej poję- cie liczby antykawitacyjnej stało się pojęciem podstawowym w aspekcie tworzenia warunków technicznych w instalacjach dla zapobieganiu kawitacji.

EN

The paper analyzes revision of the problem of interpretation of pump suction head and the problem of the formation of cavitation phenomena and a vortex of air pump suction. It is shown that in many cases in the literature incorrect interpretation of the amount of pumps suction head is present, leading to miss (zero) dynamic pressure. It is shown that the reference level of geometric height of the pump suction head has be change from pump suction tube, to the center of the pump rotor. Discusses the concept of the anticavitation number and its role in preventing the possibility of the formation of cavitation. In modern literature, the concept of the anti-cavitation number technology has become a fundamental concept in terms of creating the technical conditions in systems for preventing cavitation.

18

Indirect measure of corrosion level based on crack opening

Bossio A., Montuori M., Bellucci F., Lignol G.P., Protas A., Cosenza E., Manfredir G.

Wiadomości Konserwatorskie

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2013

|

Nr 34

36--40

EN

Reinforced concrete (RC) is a widely used material since about 100 years. The early degradation of RC structures has led to intervene on them. Main causes of degradation are carbonation, chlorides and sulphides attacks. Even if diffusion of RC structures is quite recent, however historical and cultural heritage constructions are also made of RC. To preserve the historic value of such structures could require minimally invasive measures aimed at long-term safeguarding, if they are well designed; but it is important to evaluate material characteristics. For this purpose it is necessary to use non destructive tests (NDT) to evaluate the level of degradation reached by the materials composing the structures. Main electrochemical NDT are measurement of corrosion rate and open circuit potential. The use of such techniques requires the removal of small portions of concrete cover only. They, indirectly, allow the value of corrosion penetration to be evaluated. Previous studies provided analytical models to assess crack initiation and propagation according to different values of concrete strength, concrete cover, bar diameter and type of aggregates. Such models better perform for new buildings because historic structures are usually expected to present a visible crack pattern. This paper presents another tool in the box of practitioners to assess and evaluate the vulnerability of existing structures. In particular proposed model provides bar reduction in terms of diameter or cross sectional area, depending on actual crack opening. Outputs of the paper are design charts providing direct correlation between crack width and steel reinforcement loss depending on few geometrical dimensions of RC elements.

PL

Beton zbrojony (RC) jest powszechnie stosowanym materiał od około 100 lat. Głównymi przyczynami degradacji jest nasycenie dwutlenkiem węgla, chlorki i atak siarczki. Pomimo, że dyfuzja konstrukcji żelbetowych jest stosunkowo nowa, konstrukcje dziedzictwa historycznego i kulturowego są także są wykonane z betonu zbrojonego. Aby zachować zabytkową wartość takich struktur wymagana jest długoterminowe zabezpieczenie. W tym celu konieczne jest użycie testów destrukcyjnych (NDT) do oceny stopnia degradacji. Bardzo ważny jest pomiar szybkości korozji i potencjał otwartego obwodu. Stosowanie takich technik wymaga usunięcia jedynie małej części otuliny.

19

Quality standards implementation in maritime education and training institutions: fuzzy assessment

Tuljak-Suban D.

Transport Problems

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2013

|

T. 8, z. 2

63--72

EN

Efficient organization of maritime industry is based on adequate human resources. Knowledge and skills are the results of a well organized study process and training. Since education is part of the public administration, the European Quality Management tool for the Public Sector - Common Assessment Framework (CAF) could be used, in accordance with the STCW convention requirements as a starting point to develop a model that allows quantitative assessment of the Maritime Education and Training (MET) institutions. Evaluation results and procedures are usually described qualitatively as verbal assessments that are part of a report or are summarized in statistical reports. Fuzzy reasoning permits a transition from qualitative to quantitative decision making. For this purpose, we suggest fuzzy modelling, which gives a quantitative assessment of education effectiveness. Evaluators‟ verbal assessments could be linguistic input variables of a fuzzy decision model, based on CAF recommendations and STCW convention that produces a quantitative mark of the Maritime Education and Training Institution quality

PL

Wydajna organizacja przemysłu morskiego jest oparta na odpowiednich zasobach ludzkich. Wiedza i umiejętności są rezultatem dobrze zorganizowanego procesu nauczania oraz szkolenia. Od kiedy edukacja jest częścią administracji publicznej, narzędzie Europejskiego Zarządzania Jakością dla sektoru publicznego Powszechne Oszacowanie Struktury (CAF) może zostać użyte zgodnie z wymaganiami konwencji STCW jako punkt początkowy rozwoju modelu, który pozwoli na ocenę ilościową instytucji Morskiej Edukacji i Szkolenia (MET). Ocena rezultatów i procedur jest zwykle opisywana jakościowo jako ocena słowna, SA to części raportu lub są sumowane w raporty statystyczne. Rozmyta argumentacja zezwala na przekształcenie podejmowania decyzji jakościowych w ilościowe. Do tego celu sugerujemy modelowanie rozmyte, które daje ilościową ocenę efektywności edukacji. Ewaluatory słownej oceny mogą być lingwistycznymi zmiennymi wejściowymi dla rozmytego modelu decyzyjnego, opartymi na zaleceniach CAF i jakości instytucji szkoleniowych.

20

Oszacowanie wartości charakterystycznej wytrzymałości betonu na ściskanie według aktualnych zaleceń normowych

Skrzypczak I.

Budownictwo i Architektura

|

2013

|

Vol. 12, nr 3

193--200

PL

Stosowanie odwiertów rdzeniowych jest integralną częścią oceny istniejących konstrukcji, które mają być modernizowane, przeprojektowywane lub zostały uszkodzone. Oceny wyników badań i szacowania wartości charakterystycznych wytrzymałości na ściskanie można wykonać według metody statystycznej zaproponowanej w załączniku D do normy PN-EN 1990, a także według PN- EN 13791. Procedury, zalecane w obu dokumentach różnią się od siebie, co może prowadzić do różnych oszacowań wartości charakterystycznych. Zweryfikowano, że wartości wytrzymałości charakterystycznej na ściskanie, określone według obydwu norm są do siebie zbliżone. Wartości charakterystycznej wytrzymałości na ściskanie określono w odniesieniu do obecnie obowiązujących zaleceń normowych zawartych w PN-EN 13791 i PN-EN 1990 - Załącznik D.

EN

The use of cores is an integral part of the assessment of existing structures that are modernized, redesigned or have been damaged. Evaluation of the test results and the estimation of characteristic values of compressive strength can be performed according to the statistical method proposed by the Annex D of the PN-EN 1990 [1] standard, and also according to the PN-EN 13791 [2]. The procedures recommended in these both documents are different which can lead to various assessments of the characteristic values. The author has been verified whether the empirical relationships, defined in PN-EN 13791 [2], lead to obtaining larger values of characteristic strength and, consequently, to estimation at the unsafe region. The characteristic compressive strength was of determined in accordance with the recommendations of the PN-EN 13791 code [2] and the PN-EN 1990 - Annex D [1].