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Tytuł:
RMS – system of the future or new trend in science?
Autorzy:
Gola, A.
Konczal, W
Powiązania:
https://bibliotekanauki.pl/articles/103094.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
reconfigurable manufacturing system
RMS
reconfigurability
flexibility
Opis:
Manufacturing companies in the 21st century will face unpredictable, high-frequency market changes, driven by global competition. The article presents a new concept of manufacturing systems – which address these challenges - known as Reconfigurable Manufacturing Systems (RMS). The concept began in 1999 at University of Michigan and is widely developed in many scientific publications. The paper first analyses main features of RSP. The next sections are devoted to analyze basic assumptions of RMS design and technical measures of RMS. Finally, the answer for the question if the RMS has the perspective of wide industrial implementations is discussed.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 20; 35-41
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie współczynników R2 i RMS używanych przy weryfikowaniu poprawności modeli matematycznych w oparciu o dane empiryczne
Comparing of coefficients R2 and RMS used in verifications of correctness mathematical models on basic on experimental data
Autorzy:
Kornacki, A.
Wesołowska-Janczarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/334413.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
współczynniki R2, RMS
model matematyczny
dane empiryczne
coefficients R2, RMS
mathematical model
experimental data
Opis:
Wśród współczynników wykorzystywanych do weryfikowania poprawności dopasowanych modeli są R2 i RMS. W niniejszej pracy podjęto próbę sprawdzenia, czy oba te współczynniki dają zgodne wnioski o dobroci dopasowania modelu do danych empirycznych i wskazania, który z tych współczynników można byłoby polecać praktykom. Badania przeprowadzono metodą symulacji komputerowej przy czterech różnych typach funkcji, dwóch różnych rozkładach x: normalnym i jednostajnym oraz trzech różnych zakresach zmian wartości x.
R2 and RMS are used for verification of correctness of fitting models. In this paper we try to test if both coefficients give the same conclusions about goodness of fit of model to experimental data, and which of them may be recommended to practicians. Research were conducted by means of computer simulations with four kinds of functions, two kinds of distributions of x: normal and uniform and three ranges values of x.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2010, 55, 1; 50-54
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reliability test of a GNSS onboard receiver in the kinematic mode
Autorzy:
Ćwiklak, Janusz
Krasuski, Kamil
Grzegorzewski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/320769.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
GPS
EGNOS
RMS
air navigation
linear regression
Opis:
The article presents the results of the aircraft Cessna 172 positioning based on navigation solutions in the GPS and EGNOS (SBAS) tracking mode. The article makes a comparison of coordinate readings of the Cessna 172 in the ellipsoidal BLh frame. The verification of the coordinates of the aircraft Cessna 172 was used to assess the reliability of the GNSS satellite technique in aviation. In a research test, the navigation data were recorded by the onboard receiver Thales Mobile Mapper during an air test performed over the military aerodrome EPDE in Dęblin. Judging by the conducted investigations, it is possible to conclude that the difference in BLh coordinates of the aircraft Cessna 172 on the basis of the GPS solution and EGNOS (SBAS) solution equals, respectively: from -0.5 m to +3 m for component B; and from -2 m to +6 m for component L; from approximately -11 m to over +1 m for component h. In addition, the paper defines factors of dilution of precision PDOP, based on the GPS and EGNOS (SBAS) solutions. The average value of the PDOP coefficient for a solution in the tracking GPS mode was 2.7, whereas in the EGNOS (SBAS) tracking mode, it was equal to 2.8.
Źródło:
Annual of Navigation; 2019, 26; 106-113
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza bezpieczeństwa Microsoft RMS
Security analysis of Microsoft RMS
Autorzy:
Dmitruk, J.
Kaczyński, K.
Powiązania:
https://bibliotekanauki.pl/articles/209332.pdf
Data publikacji:
2017
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
DRM
kryptografia
kryptoanaliza
RMS
Microsoft
cryptography
cryptanalysis
Opis:
Microsoft Rights Management Services (RMS) to system mający zapewniać ochronę i prawidłowe użytkowanie dokumentów elektronicznych. RMS pozwala na stosowanie różnej polityki dostępu do dokumentu, pozwalając na kontrolę jego obiegu i wykorzystania. System umożliwia zdefiniowanie polityki dostępu nie tylko w momencie tworzenia danego dokumentu, lecz także po jego dystrybucji. Microsoft RMS wykorzystuje szereg zaawansowanych mechanizmów kryptograficznych mających zapewnić bezpieczeństwo usługi. W niniejszej pracy została przeprowadzona analiza bezpieczeństwa usługi RMS, wskazująca na istnienie szeregu luk w ochronie dokumentów. Zaproponowane zostały metody rozwiązania podstawowych problemów, w szczególności związanych z zapewnieniem integralności danych.
Microsoft Rights Management Services (RMS) is a system designed to ensure the protection and proper use of electronic documents. RMS allows to apply different access policies for documents, thus allowing to control their use in time. The system allows not only defining access policies at document creation, but also after its distribution. Microsoft RMS uses a number of advanced cryptographic mechanisms and primitives to ensure overall service security. In this paper, we have analyzed the security of RMS, indicating a number of possible gaps. The methods of solving those problems, especially those related to data integrity, have been proposed.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2017, 66, 4; 75-88
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental sensor system implementation for selected micromilling-related parameters
Autorzy:
Matuszak, M.
Waszczuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/359811.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
micromilling
cutting parameters
sensor system
RMS
FFT
Opis:
The paper describes micromilling machine and implemented sensor system for microcutting operations. Sensor system can be used for cutting forces, accelerations, acoustic pressure and tool displacements measurement. Cutting forces and accelerations signals were used for cutting depth, hardness of workpiece and excitation frequency of rotating tool monitoring. Other signals obtained during experiment will be used in further work. Conclusions arising from performed experiment and further research plans are presented.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 31 (103); 134-139
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of the precise position of the aircraft in air navigation based on the solution of the RTK-OTF technique
Autorzy:
Krasuski, K.
Ćwiklak, J.
Jafernik, H.
Powiązania:
https://bibliotekanauki.pl/articles/242131.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
GPS
RTK-OTF
accuracy
air navigation
RMS
Opis:
The article presents the possibility of applying the differential technique RTK-OTF to recover the position of the aircraft in the post-processing mode. Within the framework of the conducted research, the authors designated the geocentric coordinates XYZ of the aircraft and compared them. In the research experiment, they used archive materials from the test flight of the aircraft Cessna 172 around the airfield in Deblin on 1 June 2010. The actual position of the aircraft Cessna 172 was recovered on the basis of GPS kinematic observations registered by the receiver Topcon HiperPro mounted on board the aircraft. In the calculations, the authors also used static GPS observations from the reference station REF1 as well as virtual reference stations VirA and VirB. The final coordinates of the aircraft Cessna 172 with three independent determinations RTK-OTF were defined in the AOSS v.2.0 programme. On this basis, they made verification of accuracy in determining XYZ coordinates of the aircraft Cessna 172. The dispersion of results for the difference in the designation of the X coordinate of the aircraft ranges from –0.19 m to +0.05 m. On the other hand, the size of the difference in the designation of Y-coordinate of the aircraft ranges from –0.07 m to +0.11 m. In addition, the dispersion of the results for the difference in the designation of the Z coordinate of the aircraft is from 0.19 m to +0.12 m.
Źródło:
Journal of KONES; 2017, 24, 4; 117-124
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena dokładności numerycznego modelu terenu zbudowanego z danych bezpośrednich
En evaluation in digital terrain model accuracy using direct survey data
Autorzy:
Suchocki, C.
Damięcka-Suchocka, M.
Błoch, P.
Stec, M.
Powiązania:
https://bibliotekanauki.pl/articles/341438.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy we Wrocławiu
Tematy:
numeryczny model terenu NMT
GRID
TIN
błąd RMS
parametry statystyczne
digital terrain model (DTM)
grid
RMS error
statistical coefficients
Opis:
Podstawowym i szeroko rozpowszechnionym źródłem informacji o ukształtowaniu terenu jest Numeryczny Model Terenu (NMT). Jest on wykorzystywany w wielu dziedzinach naukowych i gospodarczych. Najczęściej powierzchnię terenu prezentuje się w postaci nieregularnej siatki trójkątów (TIN) lub regularnej siatki kwadratów (GRID). Współcześni użytkownicy NMT zgłaszają zapotrzebowanie na coraz wierniejsze zobrazowanie rzeczywistego ukształtowania terenu. Istotnym zagadnieniem staje się więc porównywanie jakości i dokładności numerycznego modelu TIN z modelem GRID. W pracy dokonano oceny dokładności Numerycznych Modeli Terenu zbudowanych z danych bezpośrednich. Dane te pozyskano z pomiaru techniką GPS RTK terenu o powierzchni około jednego hektara i deniwelacji około 12 m. Do badań wybrano model typu TIN oraz dwa modele typu GRID zbudowane algorytmami interpolacyjnymi: Natural Neighbor i Spline. Ocenę dokładności wszystkich modeli przeprowadzono na podstawie wartości błędu RMS oraz wybranych parametrów statystycznych.
A Digital Terrain Model (DTM) is an important, widely used source of information about the shape of the Earth which is integral to many scientific and economic fields. The surface of an area of land is usually represented in the form of a Triangular Irregular Network (TIN) or a regular grid of squares (GRID). Current users of DTM have been expressing a need for more accurate representations of physical land surfaces. Comparisons of the quality and accuracy of TIN and GRID models has become an important topic of interest. This paper presents an evaluation of the accuracy of Digital Terrain Models based on direct survey data. Data were gathered from GPS RTK measurements of a 1-hectare area with about 12m of elevation. One TIN and two GRID models were built using interpolation algorithms: Natural Neighbor and Spline. The assessment of the accuracy of the models was based on errors in the value of the RMS and selected statistical coefficients.
Źródło:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum; 2013, 12, 3; 17-26
1644-0668
Pojawia się w:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test stand in university of applied science giessen for friction forces measurements in slide bearing using the acoustic emission method
Autorzy:
Ziegler, B.
Wierzcholski, K.
Miszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/243498.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
acoustic emission (AE)
RMS
test stand construction
journal bearing
Opis:
The present paper shows particularly description of the construction of the test stand for experimental research performed in University of Applied Science Giessen and connected with the measurements of hydrodynamic friction forces in journal slide bearings by using the Acoustic Emission Method. The test stand is adapted for the friction force measurements for the low bearing load and for the high bearing load. For such test stand in the case of low and high loads the dependencies between friction forces and time can be exactly obtained. During the measurements the temperature changes are expected. The advantage of this method is the fact that oscillations of measured friction values can be executed directly from the source to the sensor, what enables us to do an "online-measurement". The Acoustic Emission Analysis is (in opposite to the aforementioned Friction Power measurement) a relative method, which means, that the absolute amount of a RMS-Value depends on the measuring chain.
Źródło:
Journal of KONES; 2008, 15, 3; 591-595
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration analysis of ball bearing considering waviness under high speed and an axial load
Autorzy:
Hou, P. P.
Wang, L. Q.
Peng, Q. Y.
Powiązania:
https://bibliotekanauki.pl/articles/201434.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rotational speed
ball bearing
vibration characteristics
frequency band
RMS
Opis:
Based on the rolling bearing vibration measurement principle in ISO standard, a nonlinear dynamic model of ball bearing is built and motion equations of the inner ring, outer ring, and rolling elements are derived by using Lagrange’s equation. The ball bearing model includes the influence of waviness, rotational speed, external load, arbor supporting stiffness and arbor eccentricity. Ball bearing high-speed vibration tests are performed and used to verify the theoretical results. Simulated results showed that specific waviness orders produced the principal frequencies that were proportional to rotational speed. Rotational speed mainly affected the value of the natural frequency of the bearing system, and RMS (Root Mean Square) of the full band had a great fluctuation with the increase of rotational speed. In the experiment, spectrum and RMS of 2 ƒs-30 kHz (ƒs : the rotational frequency of inner ring/arbor) under high speed could include not only the influence of rotational speed but also principal frequencies produced by waviness, which could cover the part of requirements of the standard bearing vibration measurement.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 517-527
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency synchronization error correction by using DFT in sinusoidal voltage measurements
Autorzy:
Krajewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/114200.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
correction of synchronization error
accurate RMS voltage measurement
DFT algorithm
Opis:
The paper presents a method of correcting a frequency synchronization error in the sinusoidal voltage measurement. Correction is performed by changing a frequency of the measured signal on the basis of the respectively determined synchronization error by using DFT. Carried out simulation experiments indicate that the correction can theoretically improve the accuracy of measurement of the RMS voltage to the level below 1 ppm. The results of measurements taken by a highly accurate voltmeter Agilent 3458 confirm the conclusions of the simulation, that it is possible to repeatedly reduce the frequency synchronization error by applying the developed correction method in the voltage measurement.
Źródło:
Measurement Automation Monitoring; 2016, 62, 7; 218-220
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction forces measurements by the acoustic emission for slide bearing test stand in uni of applied science Giessen
Autorzy:
Ziegler, B.
Wierzcholski, K.
Miszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/241935.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
acoustic emission (AE)
RMS
experimental data
test stand
journal bearing
Opis:
The present paper describes the results of measurements performed in University of Applied Science Giessen and determined hydrodynamic friction forces in journal slide bearings by using the Acoustic Emission Method. It describes the use of the Acoustic Emission Analysis as an indicator of the bearing friction at slide bearings. The investigations were made at two different test stands. The test stand at Maritime University Gdynia covers the hydrodynamic operation range, the test stand at University of Applied Science Giessen the mixed friction area. The successive steps of measurements of the hydrodynamic friction forces are presented in this paper. Hardness and roughness of cooperating surfaces is in this paper particularly described. The friction values and its boundary conditions at the test were measured for the low bearing load and for the high bearing load. In both cases, the dependencies between friction forces and time are exactly obtained. During the measurements, the temperature is taken into account. The advantage of this method is the fact that these oscillations can be executed directly from the source to the sensor, what enables us to do an "online-measurement". The Acoustic Emission Analysis is (in opposite to the aforementioned friction power measurement) a relative method, which means, that the absolute amount of a RMS-Value depends on the measuring chain. The results are compared and discussed with other results obtained in experiments performed in Maritime University Gdynia.
Źródło:
Journal of KONES; 2008, 15, 4; 627-633
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction forces measurements for slide bearing test stand in maritime university Gdynia using the acoustic emission method
Autorzy:
Ziegler, B.
Wierzcholski, K.
Miszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/244011.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
acoustic emission (AE)
RMS
experimental data
test stand
journal bearing
Opis:
The present paper determines the results of experimental research performed in Gdynia Maritime University and connected with the measurements of hydrodynamic friction forces in slide journal slide bearings by using the Acoustic Emission Method. A new method for mechanical friction force measuring was carried out at this test stand, simultaneously the friction force will be indicated by an optimized Acoustic Emission System. The friction conditions at the test were measured by two different methods. At the one hand the friction power measurement and at the other hand the Acoustic Emission Analysis. One characteristic of the friction power measurement is the rather inert reaction to the oscillations of the slide bearing. The advantage of the method is the fact that one can measure absolute values of the friction power. In opposite to that, the Acoustic Emission Analysis measures the high frequency oscillations caused by the hydrodynamic friction between the oil molecules. The advantage of this method is the fact that this oscillations can be executed directly from the source to the sensor, what enables us to do an "online-measurement". The Acoustic Emission Analysis is (in opposite to the aforementioned friction power measurement) a relative method, which means, that the absolute amount of a RMS-Value depends on the measuring chain. The results are compared and discussed with other results obtained in experiments performed in University of Applied Science Giessen.
Źródło:
Journal of KONES; 2008, 15, 2; 571-577
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of gas detonation spraying parameters on the geometrical structure of Fe-Al intermetallic protective coatings
Autorzy:
Chrostek, Tomasz
Bramowicz, Mirosław
Rychlik, Kazimierz
Wojtkowiak, Adam
Senderowski, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/298459.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
GDS
Detonation Gas Spraying
Fe-Al
intermetallic alloys
fractal analysis
RMS
Opis:
The paper presents the results of an analysis of the geometrical structure of Fe-Al intermetallic protective coatings sprayed under specified gun detonation spraying (GDS) conditions. Two barrel lengths, two powder injection positions (PIP) at the moment of spark detonation, and two numbers of GDS shots with 6.66 Hz frequency were applied as variable parameters in the GDS process. Surface profile measurements were conducted by contact profilometry with the use of the TOPO-01 system and the Mitutoyo SJ 210 profilometer. The measured parameters were used to analyze surface topography in two-dimensional (2D) and three-dimensional (3D) systems. It was assumed that roughness can be regarded as a non-stationary parameter of variance in surface amplitude which is highly dependent on the sampling rate and spraying distance. Therefore, changes in surface amplitude parameters and functional properties were analyzed across segments with a length (ln) of 1.25, 4 and 12.5 mm. The development of the geometric structure of the surface was analyzed with the RMS (Root Mean Square) fractal method, and the geometric structure of the surface stretched by several orders of magnitude was evaluated based on the correlation between roughness (Rq), segment length (ln) and fractal dimension (D). The RMS method and the calculated fractal dimension (D) supported the characterization of the geometric structure of intermetallic Fe-Al protective coatings subjected to GDS under the specified process conditions based on the roughness profiles of surface segments with a different length (ln).
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(3); 249-262
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal modeling and RMS current measurement in electrical power lines using IR thermography
Autorzy:
Torzyk, B.
Więcek, B.
Powiązania:
https://bibliotekanauki.pl/articles/114450.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
RMS electrical current measurement
heat transfer modeling
overhead power lines
IR thermography
Opis:
Thermal modeling in frequency domain and experiments using IR thermography are performed to evaluate RMS current in electrical power lines. The model implements interface thermal resistance between the metal core and insulation layer. This allowed matching the results of simulations and measurements with acceptable accuracy. The proposed method requires the use of known values of heat transfer coefficient and thermal parameters of the cable and its insulation. In consequence the proposed method requires calibration.
Źródło:
Measurement Automation Monitoring; 2018, 64, 3; 53-56
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the influence of lateral suspension parameters on the ride quality of railway vehicles
Autorzy:
Dumitriu, M.
Powiązania:
https://bibliotekanauki.pl/articles/280158.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
railway vehicle
ride quality
lateral suspension
vibration behaviour
R.M.S. acceleration
Opis:
This paper deals with the influence of parameters of the lateral suspension on the ride quality of railway vehicles during running on a track with lateral deviations, compared to the designing geometry. The ride quality is evaluated at speed 200 km/h, based on lateral accelerations in three reference points of the vehicle carbody. The values corresponding to these accelerations are derived from numerical simulations on a non-linear model of the vehicle with 21 degrees of freedom. The results thus obtained validate a series of features in vibrational behaviour of the railway vehicle and the possibility to improve the ride quality by the best possible selection of the suspension parameters.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1231-1243
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
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