Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "errors" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 33
Tytuł:
Relation between kinematic straightness errors and angular errors of machine tool
Relacja pomiędzy kinematycznymi błędami prostoliniowości i błędami kątowymi maszyn technologicznych
Autorzy:
Majda, P.
Powiązania:
https://bibliotekanauki.pl/articles/175829.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
błędy kinematyczne
błędy geometryczne
obrabiarka
kinematic errors
geometrical errors
machine tool
Opis:
The article presents the results of simulation studies aimed at verifying the usefulness of the concept of calculating kinematic straightness errors from angular errors. Based on the calculations of a flexible machine tool, no relationship was found between the two types of errors. This clearly shows that straightness errors and angular errors of machine tools should be treated as independent of each other.
W artykule przedstawiono wyniki badań symulacyjnych, celem zweryfikowania przydatności opracowanej koncepcji przeliczania charakterystyk błędów kinematycznych prostoliniowości na podstawie charakterystyki błędów kątowych. Analiza wyników obliczeń odkształcalnego stołu obrabiarki nie potwierdziła ścisłej zależności pomiędzy tymi błędami. Jest to podstawą do stwierdzenia konieczności traktowania błędów prostoliniowości i błędów kątowych obrabiarek jako niezależnych.
Źródło:
Advances in Manufacturing Science and Technology; 2012, 36, 1; 47-53
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A reactive algorithm for deducing nodal forwarding behavior in a multihop ad-hoc wireless network in the presence of errors
Autorzy:
Rydzewski, Karol
Konorski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/225979.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ad hoc
networks
reputation
errors
Opis:
A novel algorithm is presented to deduce individual nodal forwarding behavior from standard end-to-end acknowledgments. The algorithm is based on a well-established mathematical method and is robust to network related errors and nodal behavior changes. The proposed solution was verified in a network simulation, during which it achieved sound results in a challenging multihop ad-hoc network environment.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 1; 193-199
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extremal dynamic errors in linear dynamic systems
Autorzy:
Górecki, H.
Zaczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/199915.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
extremal dynamic errors
linear dynamic systems
Opis:
Two different analytical methods of determining extremal dynamic errors in linear dynamic systems are presented. The main idea of these methods is based on finding certain additional equations. These additional equations are obtained due to the assumption that an extremal point obtained from the necessary condition dx/dt=0, is also an extremum point with respect to initial conditions, that is, d/dci= 0, i = 1, . . . , n.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 99-105
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Errors of Piezoelectric Sensors used in Weapon Stabilizers
Autorzy:
Korobiichuk, I.
Powiązania:
https://bibliotekanauki.pl/articles/221590.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acceleration
piezoelectric sensor
errors
weapon stabilizer
Opis:
Effectiveness of operation of a weapon stabilization system is largely dependent on the choice of a sensor, i.e. an accelerometer. The paper identifies and examines fundamental errors of piezoelectric accelerometers and offers measures for their reduction. Errors of a weapon stabilizer piezoelectric sensor have been calculated. The instrumental measurement error does not exceed 0.1 × 10−5 m/s2. The errors caused by the method of attachment to the base, different noise sources and zero point drift can be mitigated by the design features of piezoelectric sensors used in weapon stabilizers.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 91-100
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Supply Chain Network to Reduce Impacts of Damages during Shipping
Autorzy:
Abushaega, Mastoor M.
Daehy, Yahya H.
Alghamdi, Saleh Y.
Krishnan, Krishna K.
Khamaj, Abdulrahman
Powiązania:
https://bibliotekanauki.pl/articles/1841416.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
supply chain network
damage recovery scenarios
closed loop supply chain
type I errors
type II errors
Opis:
Recently, the expand of industrial market has led to have long supply chain network. During the long shipment, the probability of having damaged products is likely to occur. The probability of having damaged products is different between stages and that could lead to higher percentage of damaged products when arrived at retailers. Many companies have rejected the entire shipment because the damaged product percentage was higher than that agreed on. Decision-makers have tried to reduce the percentage of damaged products that happened because the transit, loading unloading the shipment, and natural disasters. Companies started to implement recovery centers in the supply chain network in order to return their system steady statues. Recovery models have been developed in this paper to reduce the damaged percentage at minimum costs to do so. Results show that the possibility of implementing an inspection unit and a recovery centers in the system before sending the entire shipment to the retailer based on examining a sample size that has been selected randomly from the shipment and the minimum cost of committing type I and type II errors. Designing a methodology to minimize the total cost associated with the supply chain system when there is a possibility of damage occurring during shipping is the objective of this research.
Źródło:
Management and Production Engineering Review; 2021, 12, 2; 17-26
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Typical errors in economical texts
Autorzy:
Stachak, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/703224.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
methodology
typical errors in economical texts
economy
Opis:
In this article the essence of wording errors’ in scientific texts and typical errors as: ambiguity, inadequate responses, paraphrases, defective responses are reviewed.
Źródło:
Nauka; 2007, 2
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metrological properties of A/D converters utilizing higher order sigma-delta modulators compared with A/D converters with modulators of first order
Autorzy:
Sidor, T.
Powiązania:
https://bibliotekanauki.pl/articles/221049.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
A/D converters
sigma-delta modulators
quantization errors
Opis:
Time domain analysis is used to determine whether A/D converters that employ higher order sigma-delta modulators, widely used in digital acoustic systems, have superior performance over classical synchronous A/D converters with modulators of first order when taking into account their important metrological property which is the magnitude of the quantization error. It is shown that the quantization errors of delta-sigma A/D converters with higher order modulators are exactly on the same level as for converters with a first order modulator.
Źródło:
Metrology and Measurement Systems; 2014, 21, 1; 39-46
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional order model of measured quantity errors
Autorzy:
Cioć, R.
Chrzan, M.
Powiązania:
https://bibliotekanauki.pl/articles/200953.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional calculus
data processing
measured quantities errors
jitter
Opis:
The paper presents an interpretation of fractional calculus for positive and negative orders of functions based on sampled measured quantities and their errors connected with digital signal processing. The derivatives as a function limit and the Grunwald-Letnikov differintegral are shown in chapter 1 due to the similarity of the presented definition. Notation of fractional calculus based on the gradient vector of measured quantities and its geometrical and physical interpretation of positive and negative orders are shown in chapter 2 and 3.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1023-1030
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inaccuracy in self-synchronisation of vibrators of two-drive vibratory machines caused by insufficient stiffness of vibrators mounting
Zakłócenia samosynchronizacji wibratorów dwunapędowych maszyn wibracyjnych na skutek niepełnej sztywności posadowienia wibratorów
Autorzy:
Michalczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/356435.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wibratory inercyjne
maszyny wibracyjne
vibratory machines
self-synchronisation errors
Opis:
The influence of an insufficient stiffness of inertial vibrators mounting to a vibratory machine body on phase angles of unbalanced masses and on a machine motion was analysed in the paper. The mathematical model of the effect was developed and the analytical dependencies determining the influence of the mounting elasticity on the synchronisation and machine movement - useful in engineering practice - were obtained.
W pracy poddano analizie wpływ nie w pełni sztywnego zamocowania wibratorów inercyjnych do korpusu maszyn wibracyjnych na kąty fazowe mas niewyważonych i ruch maszyny. Zbudowano model matematyczny zjawiska i uzyskano zależności analityczne określające wpływ podatności zamocowania na przebieg synchronizacji i ruch maszyny, przydatne w praktyce inżynierskiej.
Źródło:
Archives of Metallurgy and Materials; 2012, 57, 3; 823-828
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On statistical estimations of vehicle speed measurements
Autorzy:
Skeivalas, Jonas
Paršeliūnas, Eimuntas
Putrimas, Raimundas
Šlikas, Dominykas
Powiązania:
https://bibliotekanauki.pl/articles/220723.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vehicle speed
speedometer
maximum permissible error
skew normal distribution
errors
Opis:
The accuracy of vehicle speed measured by a speedometer is analysed. The stress on the application of skew normal distribution is laid. The accuracy of measured vehicle speed depends on many error sources: construction of speedometer, measurement method, model inadequacy to real physical process, transferring information signal, external conditions, production process technology etc. The errors of speedometer are analysed in a complex relation to errors of the speed control gauges, whose functionality is based on the Doppler effect. Parameters of the normal distribution and skew normal distribution were applied in the errors analysis. It is shown that the application of maximum permissible errors to control the measuring results of vehicle speed gives paradoxical results when, in the case of skew normal distribution, the standard deviations of higher vehicle speeds are smaller than the standard deviations of lower speeds. In the case of normal distribution a higher speed has a greater standard deviation. For the speed measurements by Doppler speed gauges it is suggested to calculate the vehicle weighted average speed instead of the arithmetic average speed, what will correspond to most real dynamic changes of the vehicle speed parameters.
Źródło:
Metrology and Measurement Systems; 2019, 26, 3; 551-559
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of a compact laser scanner as a sensor for legged mobile robots
Autorzy:
Łabęcki, P.
Nowicki, M.
Skrzypczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/407415.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mobile robot
walking robot
navigation
sensor
laser scanner
measurement errors
Opis:
This article considers selected operational characteristics and measurement errors of the 2D laser scanner URG-04LX, which is a compact sensor suitable for walking robots. Quantitative errors in range measurement are evaluated considering the intensity output available from the sensor. The obtained intensity values help to correct the range measurements with regard to the optical characteristics of the observed surfaces. Moreover, mixed measurements are characterized and compared to the mixed measurements characteristics in the popular Sick LMS 200 laser scanner. Finally, it is shown how taking into account the error characteristics of the URG-04LX scanner improves its performance as the main exteroceptive sensor of a small walking robot.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 45-52
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Localization technique of IoT Nodes Using Artificial Neural Networks (ANN)
Autorzy:
Krupanek, Beata
Bogacz, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/1844456.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wireless networks
node localization
location errors
WSN
IoT
neural networks
Opis:
One of the ways to improve calculations related to determining the position of a node in the IoT measurement system is to use artificial neural networks (ANN) to calculate coordinates. The method described in the article is based on the measurement of the RSSI (Received Signal Strength Indicator), which value is then processed by the neural network. Hence, the proposed system works in two stages. In the first stage, RSSI coefficient samples are taken, and then the node location is determined on an ongoing basis. Coordinates anchor nodes (i.e. sensors with fixed and previously known positions) and the matrix of RSSI coefficients are used in the learning process of the neural network. Then the RSSI matrix determined for the system in which the nodes with unknown positions are located is fed into the neural network inputs. The result of the work is a system and algorithm that allows determining the location of the object without processing data separately in nodes with low computational performance.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 4; 769-774
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two relations for generalized discrete Fourier transform coefficients
Autorzy:
Spałek, D.
Powiązania:
https://bibliotekanauki.pl/articles/201835.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
generalized discrete Fourier transform
coefficient errors
aliasing
dyskretna transformata Fouriera
Opis:
A new generalized discrete Fourier transform DFT that allows for sample shift δ 2 [0, T/N] in time-domain is defined. Two relations are proved for the sum of errors between generalized DFT coefficients and theirs theoretical values. The first is the equation for samples received for continuous and piecewise–smooth functions. The second relation is the inequality for samples generated by discontinuous functions. Moreover, the influence of samples shift on generalized DFT coefficients values, which leads to aliasing phenomenon, is presented.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 3; 275-281
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparisons of envelope morphological filtering methods and various regular algorithms for surface texture analysis
Autorzy:
Podulka, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/220525.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface texture
surface topography measurement
envelope filter
morphological filtering
measurement errors
Opis:
In this paper both envelope approach and morphological filters for characterisation of surface textures were proposed, applied and thoroughly examined. Obtained results were compared with those received after appliance of commonly-used algorithms. The effect of appliance of proposed procedures on surface topography parameters (from ISO 25178 standard) was taken into consideration. The following types of surface textures were assessed: two-process plateau-honed cylinder liners, plateau-honed cylinder liners with additionally burnished dimples, turned piston skirts, grinded and/or isotropic topographies. It was assumed that envelope characteristics (envelope filtration) can provide results useful for assessments of deep and/or wide oil-reservoirs especially when they are edge located. Moreover, some near-valley areas of surface texture details can be less distorted when envelope filtering is accomplished. It was also found that closing and/or opening envelope filtration can be valuable for reduction of some surface topography measurement errors.
Źródło:
Metrology and Measurement Systems; 2020, 27, 2; 243-263
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of emitter location accuracy with the modified triangulation method by means of maximum likelihood estimators
Autorzy:
Matuszewski, Jan
Kraszewski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2052134.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
emitter location
triangulation method
errors ellipse
maximum likelihood estimators
electronic warfare
Opis:
The determination of precise emitter location is a very important task in electronic intelligence systems. Its basic requirements include the detection of the emission of electromagnetic sources (emitters), measurement of signal parameters, determining the direction of emitters, signal analysis, and the recognition and identification of their sources. The article presents a new approach and algorithm for calculating the location of electromagnetic emission sources (radars) in a plane based on the bearings in the radio-electronic reconnaissance system. The main assumptions of this method are presented and described i.e. how the final mathematical formulas for calculating the emitter location were determined for any number of direction finders (DFs). As there is an unknown distance from the emitter to the DFs then in the final formulas it is stated how this distance should be calculated in the first iteration. Numerical simulation in MATLAB showed a quick convergence of the proposed algorithm to the fixed value in the fourth/fifth iteration with an accuracy less than 0.1 meter. The computed emitter location converges to the fixed value regardless of the choice of the starting point. It has also been shown that to precisely calculate the emitter position, at least a dozen or so bearings from each DFs should be measured. The obtained simulation results show that the precise emitter location depends on the number of DFs, the distances between the localized emitter and DFs, their mutual deployment, and bearing errors. The research results presented in the article show the usefulness of the tested method for the location of objects in a specific area of interest. The results of simulation calculations can be directly used in radio-electronic reconnaissance systems to select the place of DFs deployment to reduce the emitter location errors in the entire reconnaissance area.
Źródło:
Metrology and Measurement Systems; 2021, 28, 4; 781-802
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 33

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies