Temat: deviations - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Możliwość wykorzystania przyrządu Hommel Etamic F50 do pomiaru odchyłek okrągłości wałków po toczeniu wykończeniowym
Possibility of Application of the Hommel Etamic F50 Device for Measuring Roundness Deviations of Shafts After Finish Turning
Autorzy:: Labuda, W.
Iwaszko, E.
Powiązania:: https://bibliotekanauki.pl/articles/342094.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:: finish turning
shape deviations
roundness deviations
toczenie wykończeniowe
parametry skrawania
odchyłki okrągłości
Opis:: Jednym z problemów współczesnych technik wytwarzania jest zapewnienie odpowiedniej jakości wyrobu, przy minimalizacji kosztów i jednoczesnym wzroście wydajności produkcji. Podczas obróbki wykończeniowej nadawane są ostateczne wymiary i właściwości użytkowe danego elementu, dlatego też niezbędna jest kontrola ich geometrii – w tym odchyłek kształtu. W artykule przedstawiono wyniki badań wpływu zmiany parametrów skrawania na wartość odchyłek okrągłości wałków toczonych płytką Wiper. Badania przeprowadzono na wałku o średnicy 39 mm, wykonanym ze stali konstrukcyjnej S235JR. Proces toczenia czopów wału zrealizowano na tokarce uniwersalnej kłowej CU500MRD. Podczas badań wykorzystano nóż tokarski z wymienną płytką skrawającą WNMG-080408 WF. Pomiar odchyłek kształtu wykonano przyrządem Hommel Etamic F50. Urządzenie umożliwia wykonanie precyzyjnych i wydajnych pomiarów odchyłek okrągłości w postaci kompaktowego systemu pomiarowego.
One of the greatest problem of modern production techniques is the achievement of an appropriate quality at minimal costs and accompanied by the production efficiency increase. During finish treatment the final dimensions as well as functional properties are imparted to a given element by application of proper treatment type. Therefore, it is necessary to control their geometry – including deviations of shape.The paper presents the results of influence of changing cutting parameters on the values of the roundness deviations of shaftsafter turning process by Wiper type insert. The turning process of shaft pins f39 mm in diameter, made of S235JR standard steel was carried out on a CU500MRD universal lathe. The turning process was conducted by WNMG-080408 WF replacable insert. The measurement of shape deviation was recorded using a Hommel Etamic F50. The device allows to provide precise and efficient measurements of roundness deviations in the form of a compact measuring system.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Gdyni; 2018, 105; 87-97
1644-1818
2451-2486
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Aspects of using correlation calculus in comparative measurements of geometric deviations and shape profiles of main crankshaft bearing journals
Autorzy:: Nozdrzykowski, K.
Bejger, A.
Powiązania:: https://bibliotekanauki.pl/articles/360393.pdf
Data publikacji:: 2013
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: correlation calculus
comparative measurements
geometric deviations
Opis:: This article discusses possible applications of correlation calculus as a universal tool enabling verification of a procedure for correct selection of elastic support system. Such system is used in measurements values of roundness deviations of main crankshaft bearing journals and assessment of shape correctness of measured roundness profiles. These profiles can be mathematically represented as a sum of terms of a Fourier trigonometric series.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 35 (107); 114-117
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Estimation of nuisance parameters for inference based on least absolute deviations
Autorzy:: Niemiro, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/1340477.pdf
Data publikacji:: 1995
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: least absolute deviations
kernel density/regression estimation
Opis:: Statistical inference procedures based on least absolute deviations involve estimates of a matrix which plays the role of a multivariate nuisance parameter. To estimate this matrix, we use kernel smoothing. We show consistency and obtain bounds on the rate of convergence.
Źródło:: Applicationes Mathematicae; 1993-1995, 22, 4; 515-529
1233-7234
Pojawia się w:: Applicationes Mathematicae
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Changes in body posture parameters: a four-year follow-up study
Autorzy:: Łabęcka, Marta
Powiązania:: https://bibliotekanauki.pl/articles/28761955.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: frontal plane
posture
children
postural deviations
photogrammetric method
Opis:: Body posture is an alignment of its segments relative to each other in a certain way and the relations between them. Abnormalities in the alignment of body segments or the cooperation of systems may cause postural defects. Scientific evidence showed that children of school age are more exposed to abnormalities in body posture so posture should be monitored because it is a key aspect of their body's physical health. This study aimed to evaluate changes in body posture parameters in the frontal plane in the same children at 5 and then 9 years of age. This four-year follow-up study included 67 children (29 girls and 38 boys) in preschool-age and school-age phases (the first examination at 5 years of age and the second examination at 9 years of age). Measurements of body weight and height were recorded. The computerized assessment of body posture was performed with the photogrammetric method (MORA 4 Generation). The normality of the distribution of variables was assessed with the Shapiro-Wilk test. Analysis of qualitative data was carried out using Pearson’s chi-squared test. The highest percentage of children were characterized by the deterioration in the position of the lower corners of the scapulae, taking into account the division into sex (respectively in girls 51.7 % and boys 50.0 %) and the analysis of the whole group (50.7 %). There were statistically significant differences in the position of the lower corners of scapulae (UL) between the first and second examinations in all examined children (p = 0.005). The difference in the height of the waist and in the position of the shoulders improved and deteriorated in a similar percentage in children (above 30-40 %). Generally, an improvement in body posture was observed, however, the occurred abnormalities of body posture indicate the need to continuously monitor the children's posture and implementation of preventive and corrective measures.
Źródło:: Central European Journal of Sport Sciences and Medicine; 2023, 44; 5-14
2300-9705
2353-2807
Pojawia się w:: Central European Journal of Sport Sciences and Medicine
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: The specific dynamic capacity of a planetary roller screw with random deviations of the thread pitch
Autorzy:: Lisowski, F.
Powiązania:: https://bibliotekanauki.pl/articles/279397.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: planetary roller screw
specific dynamic capacity
random deviations
Opis:: The paper presents an analysis of the specific dynamic capacity of a planetary roller screw including random deviations of the thread pitch. Results are based on a statistical analysis of loads between the screw and the roller obtained for the accepted bar model to determine the load distribution. Furthermore, the finite element analysis has been applied to determine stiffness coefficients of the screw-roller and the roller-nut cooperation. The purpose of the following considerations is to assess a decrease in the specific dynamic capacity of the planetary roller screw depending on random deviations of the thread pitch.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 3; 991-1001
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Adaptive control of discrete time Markov processes by the large deviations method
Autorzy:: Duncan, T.
Pasik-Duncan, B.
Stettner, Łukasz
Powiązania:: https://bibliotekanauki.pl/articles/1208162.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:: discrete time controlled Markov processes
adaptive control
large deviations
Opis:: Some discrete time controlled Markov processes in a locally compact metric space whose transition operators depend on an unknown parameter are described. The adaptive controls are constructed using the large deviations of empirical distributions which are uniform in the parameter that takes values in a compact set. The adaptive procedure uses a finite family of continuous, almost optimal controls. Using the large deviations property it is shown that an adaptive control which is a fixed almost optimal control after a finite time is almost optimal with probability nearly 1.
Źródło:: Applicationes Mathematicae; 2000, 27, 3; 265-285
1233-7234
Pojawia się w:: Applicationes Mathematicae
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Accelerated methods for estimating the durability of plain bearings
Autorzy:: Czerniec, M.
Powiązania:: https://bibliotekanauki.pl/articles/103001.pdf
Data publikacji:: 2014
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: enhanced numerical methods
durability evaluation
plain bearings
accuracy deviations
Opis:: The paper presents methods for determining the durability of slide bearings. The developed methods enhance the calculation process by even 100000 times, compared to the accurate solution obtained with the generalized cumulative model of wear. The paper determines the accuracy of results for estimating the durability of bearings depending on the size of blocks of constant conditions of contact interaction between the shaft with small out-of-roundedness and the bush with a circular contour. The paper gives an approximate dependence for determining accurate durability using either a more accurate or an additional method.
Źródło:: Advances in Science and Technology. Research Journal; 2014, 8, 23; 73-79
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Selection of Optimal Machining Strategy in the Manufacture of Elements Bounded by Curvilinear Surfaces
Autorzy:: Czerech, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/386869.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: maszyny
CAD
CAM
toolpath tolerance
machining strategy
geometric deviations
Opis:: Increasing machining accuracy realized on CNC machine tools causes that the more frequently surfaces machined with this technique are not subject to further finishing processing and directly affects on the final quality of the product. Achieving geometric accuracy established by the constructor is the problem that modern technologists and CAD/CAM programmers have to faced with. The paper presents the influence of toolpath tolerance and machining strategy available in CAD/CAM software on the constituting process of technological surface layer for elements limited with curvilinear surfaces. The impact of the above mentioned parameters on the location and direction of geometrical deviations were also analyzed. Following article is part of research of the impact of selected technological parameters on the freeform surfaces geometric structure manufactured on CNC machines
Źródło:: Acta Mechanica et Automatica; 2013, 7, 1; 5-10
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Czy pieprzyć o czymś to 'mówić głupstwa'? Kilka uwag o znaczeniu
Does pieprzyć o czymś ('talk shit about something') mean 'mówić głupstwa' ('talk nosense')? A few comments on meaning
Autorzy:: Wołk, Mariola
Powiązania:: https://bibliotekanauki.pl/articles/568241.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Mikołaja Kopernika w Toruniu. Wydawnictwo UMK
Tematy:: verbs of speaking
epistemic deviations
semantics
pragmatics
faulty speaking
Opis:: The article centers on the expression pieprzyć ('talk shit') referring to speaking (thus in the title there appears pieprzyć o czymś ('talk shit about something')). The expression is analyzed as a predicate which can be included in the group of emotionally loaded verbs referring to imperfect, in some respect faulty speaking, similarly to pleść, że_ ('to chatter that_'), mówić od rzeczy ('talk nosense'), chrzanić o czymś ('talk crap about somethng'), pierniczyć o czymś ('fib about something'), pierdolić o czymś ('talk bullshit about something'). Since the analyzed expression is colloquial and emotional, it needs to be checked if these features have a purely pragmatic character, or if they accompany some feature of meaning which would allow one to understand the described word as episthemically deviant. The next task which is undertaken in the article consists in establishing the shape of the analyzed expression. The description of the verb presented in Grochowski's Słownik polskich przekleństw i wulgaryzmów (Dictionary of Polish swear words and vulgarities) constitutes a point of departure in the discussion. The description is valuable in as much as the author applies an idea of describing linguistic units. Although delineating linguistic units with the analyzed word is an essential introduction to the semantic analysis, it was not the most important aim of the article. The interpretation presented here is not a detailed systematic characteristic of the verb pieprzyć, since it is limited to establishing its meaning and shedding some light on selected issues important in the analysis (e.g. whether 'talk shit' is semantically different from simply pieprzyć, or to put it in other words, does pieprzyć always mean 'talk nonsense', or can it mean solely 'talk'?). Also the proposed definition is to be trated as a preliminary version of formula which is to be further modified.
Źródło:: Linguistica Copernicana; 2012, 2(8); 231-244
2080-1068
2391-7768
Pojawia się w:: Linguistica Copernicana
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Applying Harmonic Analysis in the Measurements of Geometrical Deviations of the Crankshafts – Selecting Support Conditions
Autorzy:: Nozdrzykowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/2064978.pdf
Data publikacji:: 2018
Wydawca:: STE GROUP
Tematy:: harmonic analysis
geometrical deviations
elastic deflections
crankshafts
support conditions
Opis:: The article presents principles of the most suitable support conditions which enable elimination of deflections and elastic deformations of crankshafts under their self-weight. On the basis of the formulated principles sample calculations of force values of support reactions were performed. This guarantees zero value of deflections on main journals depending on the angle of rotation of the shaft, applying available programme of strength calculations Nastran FX 2010. The obtained results have been approximated with a mathematical equation applying the calculating method based on the harmonic analysis theory. Then a comparative assessment of the force diagram (the forces were obtained via strength calculations and mathematical model including so called mutual inter-correlation coefficient) was made. The obtained results of comparative analysis showed high correspondence between the compared diagrams. Presented procedures of determining the required forces ensuring elimination of deflections and elastic deformations can be applied to measurements of crankshaft geometrical deviations realized on the basis of a measuring system with, so called, flexible support of a measured object.
Źródło:: Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 191--195
2545-2827
Pojawia się w:: Multidisciplinary Aspects of Production Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "deviations" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język