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Tytuł:
A case of Dipylidium caninum infection in a child from the southeastern Poland
Autorzy:
Szwaja, B.
Romanski, L.
Zabczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/841471.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Polska
child
human infection
Dipylidium caninum
zoonosis
dog
disease symptom
tapeworm
dipylidiasis
cat
diagnosis
treatment
epidemiology
Źródło:
Annals of Parasitology; 2011, 57, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A case of Dipylidium caninum infection in a child from the southeastern Poland
Autorzy:
Szwaja, B.
Romański, L.
Ząbczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/2143353.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Polska
child
human infection
Dipylidium caninum
zoonosis
dog
disease symptom
tapeworm
dipylidiasis
cat
diagnosis
treatment
epidemiology
Opis:
Dipylidium caninum is a common intestinal tapeworm of dogs, cats and foxes. However, it occasionally infects also humans. We present a case of D. caninum infection in a 2-year-old child living in the Subcarpathian province. The infection was asymptomatic in the first months. The symptoms of abdominal pains, sleep disorders, loss of appetite, hyperactivity and occasional slimy stools appeared later. Proglottids on the underwear, in water while bathing and mobile proglottids passed with the stool were also observed. Prior to appropriate diagnosis the child was treated with pyrantelum (Pyrantelum) and albendazolum (Zentel). However, proglottids were found again in the stool after a few days. We examined stool samples and perianal smears collected from the child and his family. The stool samples were tested by coproscopic methods. Direct methods (direct preparation in 0.9% sodium chloride and in Lugol’s solution, Kato thick smear) and concentration methods (decantation with distilled water and Faust’s zinc sulphate centrifugal flotation) were used. In the stool samples taken from the child, we observed D. caninum proglottids demonstrating lateral genital pores and many packets of eggs containing from one to a few, mostly 3 to 4 eggs. In the direct preparations in 0.9% sodium chloride and in Lugol’s solution single packets with D. caninum eggs were detected. In decantation preparations many D. caninum egg packets were observed. It has to be reported that the child’s mother was infected with Giardia intestinalis. Dipylidiasis in humans is a rarely encountered infection in Poland and the diagnosis may be difficult. For these reasons we reported clinical case presentation, diagnostics, treatment and epidemiology of D. caninum infection. We have shown that concentration methods such as decantation might be very helpful in the diagnosis of dipylidiasis.
Źródło:
Wiadomości Parazytologiczne; 2011, 57, 3; 175-178
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Child with Autism in a State School – A program for working with an autistic child in primary school.
Autorzy:
Wieczorek, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/941497.pdf
Data publikacji:
2020-11-10
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
autism
school
case study
developmental spheres
educational impacts
diagnosis
Opis:
In the paper, the author discusses educational interactions focused on a child with autism. The first part of the study presents the characteristics of functioning of an autistic child, taking into account specific needs and difficulties. The research material was used to present the specificity of child’s functioning in certain developmental spheres: socio-emotional sphere, cognitive sphere, self-care, communication, sensory integration and motor integration. Bearing in mind a multi-profile diagnosis of the disorder and including various spheres of child’s functioning, the diagnosis was referenced to programming the process of support. The author concludes by presenting a reflection on dilemmas and challenges in education of autistic children.
Źródło:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej; 2020, 29; 247-261
2300-391X
Pojawia się w:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A clinical, cytogenetic and molecular study in Prader-Willi patients
Autorzy:
Krajewska-Walasek, M
Popowska, E
Gutkowska, A
Bielinska, B
Chrzanowska, K
Rump, Z
Mospinek-Krasnopolska, M
Rysiewski, H
Powiązania:
https://bibliotekanauki.pl/articles/2046801.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deletion
patient
cytogenetic deletion
diagnosis
chromosome 15
Prader-Willi syndrome
Opis:
Twenty-three patients with a putative diagnosis of Prader-Willi syndrome (PWS) were reassessed clinically and then examined by cytogenetic and molecular techniques. Nineteen patients fulfilled the diagnostic criteria for PWS and the remaining four were judged to have atypical PWS. Definite molecular defects were detected in all clinically typical PWS patients but one. A deletion of part of chromosome 15q could be identified molecularly in 14 patients (74%) and maternal disomy for chromosome 15 in four (21%). In all, except one, PWS patients with molecularly detected deletions, the deletion was also identified by cytogenetic studies. Cytogenetic deletions were suspected in two of the atypical PWS patients. However, based on the results of scoring the diagnostic criteria for PWS and on the PW71B methylation test, we were able to rule out PWS in all of our atypical patients. Our study confirms observations that both clinical and cytogenetic investigations can provide misdiagnoses of PWS in some patients, and the first, simple and fast investigation, which can confirm the PWS in most, if not all PWS patients, is molecular analysis by the methylation test.
Źródło:
Journal of Applied Genetics; 1997, 38, 2; 205-216
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A convolutional neural network-based method of inverter fault diagnosis in a ship’s DC electrical system
Autorzy:
Yan, Guohua
Hu, Yihuai
Shi, Qingguo
Powiązania:
https://bibliotekanauki.pl/articles/32898224.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
multi-energy hybrid ships
inverters
fault diagnosis
CNN
Opis:
Multi-energy hybrid ships are compatible with multiple forms of new energy, and have become one of the most important directions for future developments in this field. A propulsion inverter is an important component of a hybrid DC electrical system, and its reliability has great significance in terms of safe navigation of the ship. A fault diagnosis method based on one-dimensional convolutional neural network (CNN) is proposed that considers the mutual influence between an inverter fault and a limited ship power grid. A tiled voltage reduction method is used for one-to-one correspondence between the inverter output voltage and switching combinations, followed by a combination of a global average pooling layer and a fully connected layer to reduce the model overfitting problem. Finally, fault diagnosis is verified by a Softmax layer with good anti-interference performance and accuracy.
Źródło:
Polish Maritime Research; 2022, 4; 105-114
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A diagnostic algorithm diagnosing the failure of railway signal equipment
Autorzy:
Wu, Yongcheng
Cao, Dejin
Powiązania:
https://bibliotekanauki.pl/articles/1955227.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
failure diagnosis
railway signal equipment
denoising
feature extraction
diagnostyka uszkodzeń
sygnalizacja kolejowa
odszumianie
ekstrakcja cech
Opis:
Failure of railway signal equipment can cause an impact on its normal operation, and it is necessary to make a timely diagnosis of the failure. In this study, the data of a railway bureau from 2016 to 2020 were studied as an example. Firstly, denoising and feature extraction were performed on the data; then the Adaptive Comprehensive Oversampling (ADASYN) method was used to synthesize minority class samples; finally, three algorithms, back-propagation neural network (BPNN), support vector machine (SVM) and C4.5 algorithms, were used for failure diagnosis. It was found that the three algorithms performed poorly in diagnosing the original data but performed significantly better in diagnosing the synthesized samples, among which the BPNN algorithm had the best performance. The average precision, recall rate and F1 score of the BPNN algorithm were 0.94, 0.92 and 0.93, respectively. The results verify the effectiveness of the BPNN algorithm for failure diagnosis, and the algorithm can be further promoted and applied in practice.
Źródło:
Diagnostyka; 2021, 22, 4; 33-38
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A difficult diagnosis. Controversies around PTSD and ADHD
Autorzy:
Ewa, Odachowska
Małgorzata, Woźniak-Prus
Powiązania:
https://bibliotekanauki.pl/articles/896458.pdf
Data publikacji:
2019-11-24
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
PTSD
ADHD
diagnosis of child
trauma
Opis:
The article touches on the diagnostic problems faced by psychologists, pedagogues, and psychiatrists who try to determine the psychopathology of the difficulties in the behaviours of children. The current study focuses on the analysis of the clinical picture and the genesis of the disorders occurring as a result of an extremely stressful event (PTSD) and also attention-deficit hyperactivity disorder (ADHD). These disorders are full of diagnostic uncertainties when occurring in children. The analysis of the two disorders is based on the diagnostic criteria of DSM-5. The analysis of their etiology is based on the data concerning the functional characteristics of central nervous system. The article is summed up by an attempt to name the elements necessary for the differential diagnosis of the two disorders.
Źródło:
Psychologia Wychowawcza; 2018, Special issue; 40-55
0033-2860
Pojawia się w:
Psychologia Wychowawcza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Fast Classification Method of Faults in Power Electronic Circuits Based on Support Vector Machines
Autorzy:
Cui, J.
Shi, G.
Gong, C.
Powiązania:
https://bibliotekanauki.pl/articles/220922.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power electronics
fault diagnosis
wavelet transforms
support vector machines
directed acyclic graph
nearest neighbours
Opis:
Fault detection and location are important and front-end tasks in assuring the reliability of power electronic circuits. In essence, both tasks can be considered as the classification problem. This paper presents a fast fault classification method for power electronic circuits by using the support vector machine (SVM) as a classifier and the wavelet transform as a feature extraction technique. Using one-against-rest SVM and one-against-one SVM are two general approaches to fault classification in power electronic circuits. However, these methods have a high computational complexity, therefore in this design we employ a directed acyclic graph (DAG) SVM to implement the fault classification. The DAG SVM is close to the one-against-one SVM regarding its classification performance, but it is much faster. Moreover, in the presented approach, the DAG SVM is improved by introducing the method of Knearest neighbours to reduce some computations, so that the classification time can be further reduced. A rectifier and an inverter are demonstrated to prove effectiveness of the presented design.
Źródło:
Metrology and Measurement Systems; 2017, 24, 4; 701-720
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fault diagnosis method for substation grounding grid based on the square-wave frequency domain model
Autorzy:
Zhang, P.-H.
He, J.-J.
Zhang, D.-D.
Wu, L.-M.
Powiązania:
https://bibliotekanauki.pl/articles/221635.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
square-wave
frequency characteristics
grounding grid
fault diagnosis
Opis:
Current methods of fault diagnosis for the grounding grid using DC or AC are limited in accuracy and cannot be used to identify the locations of the faults. In this study, a new method of fault diagnosis for substation grounding grids is proposed using a square-wave. A frequency model of the grounding system is constructed by analyzing the frequency characteristics of the soil and the grounding conductors into which two different frequency square-wave sources are injected. By analyzing and comparing the corresponding information of the surface potentials of the output signals, the faults of the grounding grid can be diagnosed and located. Our method is verified by software simulation, scale model experiments and field experiments.
Źródło:
Metrology and Measurement Systems; 2012, 19, 1; 63-71
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A fault verification method for testing of analogue electronic circuits
Autorzy:
Tadeusiewicz, M.
Hałgas, S.
Powiązania:
https://bibliotekanauki.pl/articles/221477.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analogue circuits
multiple-fault diagnosis
Powell's method
verification technique
Opis:
The paper deals with multiple soft fault diagnosis of analogue circuits. A method for diagnosis of linear circuits is developed, belonging to the class of the fault verification techniques. The method employs a measurement test performed in the frequency domain, leading to the nonlinear least squares problem. To solve this problem the Powell minimization method is applied. The diagnostic method is adapted to real circumstances, taking into account deviations of fault-free parameters and measurement uncertainty. Two examples of electronic circuits encountered in practice demonstrate that the method is efficient for diagnosis of middle-sized circuits. Although the method is dedicated to linear circuits it can be adapted to multiple soft fault diagnosis of nonlinear ones. It is illustrated by an example of a CMOS circuit designed in a sub-micrometre technology.
Źródło:
Metrology and Measurement Systems; 2018, 25, 2; 331-346
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Hamiltonian approach to fault isolation in a planar vertical take-off and landing aircraft model
Autorzy:
Rodriguez-Alfaro, L. H.
Alcorta-Garcia, E.
Lara, D.
Romero, G.
Powiązania:
https://bibliotekanauki.pl/articles/330664.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Hamiltonian method
observer
fault diagnosis
nonlinear system
UAVs
metoda Hamiltonowska
obserwator
diagnoza uszkodzeń
układ nieliniowy
Opis:
The problem of fault detection and isolation in a class of nonlinear systems having a Hamiltonian representation is considered. In particular, a model of a planar vertical take-off and landing aircraft with sensor and actuator faults is studied. A Hamiltonian representation is derived from an Euler–Lagrange representation of the system model considered. In this form, nonlinear decoupling is applied in order to obtain subsystems with (as much as possible) specific fault sensitivity properties. The resulting decoupled subsystem is represented as a Hamiltonian system and observer-based residual generators are designed. The results are presented through simulations to show the effectiveness of the proposed approach.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 65-76
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A heuristic method for detecting and locating faults employing electromagnetic acoustic transducers
Heurystyczna metoda wykrywania i lokalizowania usterek z wykorzystaniem elektromagnetycznych przetworników akustycznych
Autorzy:
Gómez, C. Q. M.
García, F. P. M.
Arcos, A. J.
Cheng, L.
Kogia, M.
Mohimi, A.
Papaelias, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/1365720.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
fault detection and diagnosis
electromagnetic acoustic transducers (EMAT)
wavelet transforms
non destructive test
guided waves
wykrywanie i diagnozowanie wad
elektromagnetyczne przetworniki akustyczne
EMAT
transformaty falkowe
badania nieniszczące
fale prowadzone
Opis:
The objective of this paper is to demonstrate a novel signal processing for detection, identification and flaw sizing of structural damage using ultrasonic testing with Electromagnetic Acoustic Transducers (EMATs). Damage detection involves the recognition of a defect that exists within a structure. Damage location is the identification of the geometric position of the defect. Defect classification is the cluster of the damage type into multiple damage scenarios. In the absence of external interferences, a good measure of detectability of a flaw is its signal-to-noise ratio (SNR). Although the SNR depends on various parameters such as electronics used, material properties, e.g. homogeneity and damping, and flaw size, it can be improved using advanced signal processing. The main scientific novelties presented in this paper focus on filtering signal noise through advanced digital signal processing; incorporating wavelet transforms for image and signal representation enhancements; investigating multi-parametric analysis for noise identification and defect classification; studying attenuation curves properties for defect localisation improvement and flaw sizing and location algorithm development.
Celem niniejszego artykułu jest omówienie nowatorskiego sposobu przetwarzania sygnałów w celu wykrywania, identyfikacji i oceny uszkodzeń strukturalnych przy użyciu ultrasonograficznych testów za pomocą elektromagnetycznych przetworników akustycznych (EMAT). Wykrywanie uszkodzeń polega na rozpoznaniu istniejących defektów wewnątrz danej struktury. Lokalizacja uszkodzeń sprowadza się do identyfikacji geometrycznego położenia defektu. Klasyfikacja defektu to klaster typu uszkodzenia w wielu scenariuszach uszkodzeń. W przypadku braku zewnętrznych zakłóceń, dobrym wskaźnikiem wykrywalności błędu jest stosunek sygnału do szumu (SNR). Pomimo tego, że SNR zależy od różnych parametrów, takich jak użyta elektronika, właściwości materiału, np. jednorodność i tłumienie, a także wielkość wady, wskaźnik ten można poprawić przy użyciu zaawansowanego przetwarzania sygnałów. Główne nowe zagadnienia naukowe przedstawione w niniejszym artykule skupiają się na filtrowaniu szumu sygnału za pomocą zaawansowanego przetwarzania sygnału cyfrowego, w tym wykorzystując transformaty falkowe w celu ulepszenia obrazu i sygnału; badanie analizy wieloparametrycznej w celu identyfikacji szumów i klasyfikacji defektów; badanie właściwości krzywych osłabiania w celu sprawniejszego wykrywania i oceny wad oraz rozwoju algorytmu lokalizacji.
Źródło:
Eksploatacja i Niezawodność; 2017, 19, 4; 493-500
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A high resolution system for automatic diagnosing the condition of the core of conveyor belts with steel cords
System wysokiej rozdzielczości do automatycznej diagnostyki stanu technicznego rdzenia taśm przenośnikowych z linkami stalowymi
Autorzy:
Błażej, R.
Kirjanów, B.
Kozłowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/328636.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
conveyor belt
non-destructive testing
NDT
diagnosis
belt damage
magnetic method
automatic detection
vision module
taśma przenośnikowa
metoda nieinwazyjna
diagnostyka
uszkodzenie taśmy
automatyczna detekcja
metoda magnetyczna
moduł wizyjny
Opis:
This paper describes a mobile system for the noninvasive diagnosis of the core of conveyor belts with steel cords. The system is based on the 4-channel magnetic head of the EyeQ system which one of the Polish opencast mines bought at the beginning of the 21st century. Because of the restructuring of the mine and the aging of the EyeQ system, measures were taken to improve the latter’s resolution and performance. The upgrading consisted mainly in developing a new software for data analysis automation and in replacing the old hardware platform with a new one increasing six-fold system resulution. The system has successfully passed tests in mine conditions and is currently used to assess the condition of belts working in the mine transport system (fig. 1).
W pracy przedstawiono opis mobilnego systemu do bezinwazyjnej diagnostyki rdzenia taśm przenośnikowych z linkami stalowymi. System ten został stworzony w oparciu o 4 kanałową głowicę magnetyczną systemu EyeQ, który na początku XXI wieku zakupiła jedna z polskich kopalni odkrywkowych. Restrukturyzacja kopalni oraz starzejący się, mało wydajny system EyeQ wymusiły działania zmierzające do poprawy rozdzielczości oraz skuteczności jego działania. Głównym celem modernizacji systemu było opracowanie nowego oprogramowania umożliwiającego automatyzację procesu analizy danych oraz zmiana platformy sprzętowej zwiększającej 6-krotnie rozdzielczość systemu. Opisany w pracy system został pomyślnie przetestowany w warunkach kopalnianych i jest obecnie wykorzystywany do oceny stanu technicznego taśm pracujących w systemie transportowym kopalni (rys. 1).
Źródło:
Diagnostyka; 2014, 15, 4; 41-45
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A hybrid active fault-tolerant control scheme for wind energy conversion system based on permanent magnet synchronous generator
Autorzy:
Tahri, A.
Hassaine, S.
Moreau, S.
Powiązania:
https://bibliotekanauki.pl/articles/140788.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wind energy conversion system
active fault-tolerant control
permanent magnet synchronous generator
sensor fault diagnosis
sliding mode observer
Opis:
Wind energy has achieved prominence in renewable energy production. There- fore, it is necessary to develop a diagnosis system and fault-tolerant control to protect the system and to prevent unscheduled shutdowns. The presented study aims to provide an experimental analysis of a speed sensor fault by hybrid active fault-tolerant control (AFTC) for a wind energy conversion system (WECS) based on a permanent magnet synchronous generator (PMSG). The hybrid AFTC switches between a traditional controller based on proportional integral (PI) controllers under normal conditions and a robust backstepping controller system without a speed sensor to avoid any deterioration caused by the sensor fault. A sliding mode observer is used to estimate the PMSG rotor position. The proposed controller architecture can be designed for performance and robustness separately. Finally, the proposed methodwas successfully tested in an experimental set up using a dSPACE 1104 platform. In this experimental system, the wind turbine with a generator connection via a mechanical gear is emulated by a PMSM engine with controled speed through a voltage inverter. The obtained experimental results show clearly that the proposed method is able to guarantee service production continuity for the WECS in adequate transition.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 485--497
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A key metric and its calculation models for a continuous diagnosis capability based on a dependency matrix
Autorzy:
Shi, J.-Y.
Lin, X.-G.
Shi, M.
Powiązania:
https://bibliotekanauki.pl/articles/221741.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault diagnosis
dependency matrix
measurement
Opis:
This paper is devoted to measuring the continuous diagnosis capability of a system. A key metric and its calculation models are proposed enabling us to measure the continuous diagnosis capability of a system directly without establishing and searching the sequential fault tree (SFT) of the system. At first a description of a D matrix is given and its metric is defined to determine the weakness of a continuous diagnosis. Then based on the definition of a sequential fault combination, a sequential fault tree (SFT) is defined with its establishment process summarized. A key SFT metric is established to measure the continuous diagnosis capability of a system. Two basic types of dependency graphical models (DGMs) and one combination type of DGM are selected for characteristics analysis and establishment of metric calculation models. Finally, both the SFT searching method and direct calculation method are applied to two designs of one type of an auxiliary navigation equipment, which shows the high efficiency of the direct calculation method.
Źródło:
Metrology and Measurement Systems; 2012, 19, 3; 509-520
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1158

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