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Tytuł:
Error analysis in the fast Fourier transform algorithm for real data
Autorzy:
Mejran, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/748535.pdf
Data publikacji:
1978
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Trigonometric approximation and interpolation, Application of orthogonal and other special functions
Opis:
.
From the text: "We present a variant of the fast Fourier transform for real data and analyze its numerical implementation in t-digit floating point arithmetic. While a direct calculation of the coefficients a(k), dla k=0,...,2n from the data y(j), j=1,...,2n, or vice versa, requires O(n^2) operations, our algorithm requires O(n log_2(n) operations."
Źródło:
Mathematica Applicanda; 1978, 6, 13
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas turbine vibration monitoring based on real data and neuro-fuzzy system
Autorzy:
Nail, Bachir
Djaidir, Benrabeh
Tibermacine, Imad Eddine
Napoli, Christian
Haidour, Nabil
Abdelaziz, Rabehi
Powiązania:
https://bibliotekanauki.pl/articles/27313823.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
vibration analysis
gas turbine
centrifugal compressor
neuro-fuzzy system
ANFIS
Opis:
The gas turbine is considered to be a very complex piece of machinery because of both its static structure and the dynamic behavior that results from the occurrence of vibration phenomena. It is required to adopt monitoring and diagnostic procedures for the identification and localization of vibration flaws in order to ensure the appropriate operation of large rotating equipment such as gas turbines. This is necessary in order to avoid catastrophic failures and deterioration and to ensure that proper operation occurs. Utilizing an approach that is based on spectrum analysis, the purpose of this study is to provide a model for the monitoring and diagnosis of vibrations in a GE MS3002 gas turbine and its driven centrifugal compressor. This will be done by utilizing the technique. Following that, the collection of vibration measurements for a model of the centrifugal compressor served as a suggestion for an additional method. This method is based on the neuro-fuzzy approach type ANFIS, and it aims to create an equivalent system that is able to make decisions without consulting a human being for the purpose of detecting vibratory defects. In spite of the fact that the compressor that was investigated has flaws, this procedure produced satisfactory results.
Źródło:
Diagnostyka; 2024, 25, 1; art. no. 202410
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of real underkeel clearance for Świnoujście–Szczecin waterway in years 2009-2011
Autorzy:
Schoeneich, M.
Sokołowska, S.
Powiązania:
https://bibliotekanauki.pl/articles/360553.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
real data
probabilistic model
underkeel clearance
Opis:
The paper presents the practical using of model for underkeel clearance evaluation. Real data from Maritime Office concerning ships which enter ports was used to analysis of results first probabilistic model of underkeel clearance and next integrated system. During analysis mean probability that underkeel clearance will be less than zero was determined for ports in Świnoujście, Szczecin and Police. Results of this analysis can be used for further research connected with integrated system for underkeel clearance calculation.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 162-166
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the ships’ UKC by probabilistic model based on chosen real data in period 2005 till 2009
Autorzy:
Schoeneich, M.
Powiązania:
https://bibliotekanauki.pl/articles/2069658.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
under-keel clearance
UKC
probabilistic model
real data
Opis:
The paper is concerned with the analysis of under-keel clearance of ships based on real data from Szczecin Maritime Office. Using probabilistic method for UKC assessment give it possibility to create the distribution of under-keel clearance in several ship’s passages and in further step to determine the probability of ship’s grounding accident during the port approach. The results of using this type of model could be used in risk assessment of ships entering to the ports, therefore it is possible to used probabilistic model in Maritime Office employees’ everyday decision making practice. Research results present verification of probabilistic model, based on data from Vessel Traffic Service database and probability of touching the bottom during ships’ passages on Swinoujscie - Szczecin waterway. Moreover there are presented examples of these situations when entering to the port for analysed ships is not allowed according to the model.
Źródło:
Journal of Polish Safety and Reliability Association; 2010, 1, 1; 215--220
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified root-music algorithm and its application to real data, passive bearing estimation of shallow water acoustic targets
Autorzy:
Henclik, S.
Powiązania:
https://bibliotekanauki.pl/articles/331846.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The main problem addressed in the paper is an idea of modification and generalization of Root-MUSIC method. The algorithm is commonly used for uniform linear arrays. A concept how to generalize this method for non-uniform arrays is presented. An additional parametric test is also proposed for the selection of signal roots. Selected results of shallow water acoustic targets location (in bearing), with passive, linear array of hydrophones is also presented. The data used were acquired with an array situated in littoral waters, made and tested at Marine Technology Centre. A short background of array processing methods, especially subspace-based algorithms is included as well. Some important practical problems are also shortly discussed.
Źródło:
Hydroacoustics; 2001, 4; 87-90
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of ships trajectory planning algorithms using real navigational data
Autorzy:
Lazarowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/117103.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Visibility Graph-search Algorithm (VGA)
Discrete Artificial Potential Field (DAPF)
real navigational data
ARPA
ship's trajectory planning
ship's trajectory planning algorithms
Ant Colony Optimization (ACO)
Trajectory Base Algorithm (TBA)
Opis:
The paper presents results of ship's safe trajectory planning algorithms verification. Real navigational data registered from a radar with an Automatic Radar Plotting Aid on board the research and training ship Horyzont II were used as input data to the algorithms. The algorithms verified in the presented research include the Ant Colony Optimization algorithm (ACO), the Trajectory Base Algorithm (TBA), the Visibility Graph-search Algorithm (VGA) ant the Discrete Artificial Potential Field algorithm (DAPF). Details concerning data registration and exemplary results obtained with the use or real navigational data are introduced and summarized in the paper. Presented results prove the applicability of proposed algorithms for solving the ship's safe trajectory planning problem.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 559-564
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
My City Dashboard: Real-time Data Processing Platform for Smart Cities
Autorzy:
Usurelu, C.-C.
Pop, C.
Powiązania:
https://bibliotekanauki.pl/articles/307785.pdf
Data publikacji:
2017
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
big data
data analytics
real-time processing
smart cities
statistics
Opis:
In recent years, with the increasing popularity of IoT, the rapid growth of smartphone usage enabled by the increase adoption of Internet services and the continuously decreasing costs of these devices and services has led to a huge increase in the volume of data that governments can use in the context of smart city initiatives. The need for analytics is becoming a requirement for smart city projects such as city dashboards to provide citizens with an easy to understand overview of the city. As such, data should be analyzed, reduced and presented in such a way that citizens can easily understand various aspects of the city and use this information to increase quality of life. In this paper, we firstly present the context and the start of the design and implementation of proposed solution for real-time data processing in smart cities, mainly an analytics processing pipeline and a dashboard prototype for this solution, named My City Dashboard. We focus on high scalability and modularity of this platform.
Źródło:
Journal of Telecommunications and Information Technology; 2017, 1; 89-100
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Workstation for training ASW helicopter navigators and analysing real flight data
Autorzy:
Raganowicz, A.
Kilian, L.
Marszal, J.
Schmidt, A.
Sidorko, T.
Rudnicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/332784.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
helicopter navigators
real flight data
aviation
Opis:
The article presents a training and diagnostic workstation designed for Polish Navy ASW helicopter navigators. Installed at the helicopter base, the workstation is used for training and instruction in operating the device and analysing information gathered by navigators during the flight using the ASW onboard sonar, sonobuoy receiver and magnetometer. The workstation allows instructors to task two operators and monitor their performance under conditions resembling those onboard a plane. The tasks involve the operation of the consoles and collecting information during tactical situations, diagnosing damage and analysing flight data in office environment. The objective is to ensure proper helicopter navigator training and experience given the limited possibility of training flights.
Źródło:
Hydroacoustics; 2009, 12; 181-188
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
End-of-sample vs. Real-time Data: Perspectives for Analysis of Expectations
Autorzy:
Tomczyk, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/500478.pdf
Data publikacji:
2013-09-01
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
end-of-sample (EOS) data
real-time (RTV) data
data revisions
economic databases
expectations
Opis:
Data revision is usually defined as an adjustment published after initial value had been announced; it may reflect rectification of errors, availability of new information, introduction of new measurement or aggregation techniques etc. This paper addresses the impact of data revisions on measures of expectations and offers an introduction to empirical analysis of data vintage in testing properties of expectations. It also defines and classifies data revisions and presents a review of literature and databases available for the purposes of real time analysis.
Źródło:
Prace i Materiały Instytutu Rozwoju Gospodarczego SGH; 2013, 93: Expectations and Forecasting; 45-69
0866-9503
Pojawia się w:
Prace i Materiały Instytutu Rozwoju Gospodarczego SGH
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification and prediction of traffic flow based on real data using neural networks
Klasyfikacja i przewidywanie natężenia ruchu na podstawie rzeczywistych danych z wykorzystaniem sieci neuronowych
Autorzy:
Pamuła, T.
Powiązania:
https://bibliotekanauki.pl/articles/224093.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
traffic flow
classification of traffic flow
prediction of traffic flow
traffic management systems
natężenie ruchu
klasyfikacja natężenia ruchu
przewidywanie natężenia ruchu
zarządzanie ruchem
Opis:
This paper presents a method of classification of time series of traffic flow, on the section of the main road leading into the city of Gliwice. Video detectors recorded traffic volume data was used, covering the period of one year in 5-minute intervals - from June 2011 to May 2012. In order to classify the data a statistical analysis was performed, which resulted in the proposition of splitting the daily time series into four classes. The series were smoothed to obtain hourly flow rates. The classification was performed using neural networks with different structures and using a variable number of input data. The purpose of classification is the prediction of traffic flow rates in the afternoon basing on the morning traffic and the assessment of daily traffic volumes for a particular day of the week. The results can be utilized by intelligent urban traffic management systems.
W artykule przedstawiono metodę klasyfikacji szeregów czasowych natężenia przepływ u ruchu na odcinku głównej drogi dojazdowej w kierunku miasta Gliwice. Dane o natężeniu ruchu obejmujące okres jednego roku w interwałach godzinnych - od czerwca 2011 do maja 2012 zostały zarejestrowane przez wideodetektory. W celu klasyfikacji przeprowadzono analizę statystyczną danych i zaproponowano podział dobowych szeregów czasowych na cztery klasy. Szeregi zostały wygładzone do natężeń godzinnych. Klasyfikację wykonano z wykorzystaniem sieci neuronowych o różnych strukturach i na podstawie z mieniającej się liczby danych wejściowych. Celem klasyfikacji jest predykcja natężenia ruchu w godzinach popołudniowych na podstawie danych o natężeniu w godzinach porannych a także możliwość oceny dobowego natężenia ruchu w poszczególnych dniach tygodnia. Informacje takie są przydatne do podejmowania decyzji w Inteligentnych Systemach Transportowych (ITS) i zarządzaniu ruchem.
Źródło:
Archives of Transport; 2012, 24, 4; 519-529
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kalman filtering for 3d real time data visualization of multibeam sonar records
Autorzy:
Demkowicz, J.
Moszyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/331515.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
Kalman filtering
sonar records
visualization
Opis:
For the last decade multibeam sonars have been increasingly used for mapping and visualization of the bottom surfaces to provide the 'physical bases' for environmental studies due to theirs unprecedentedly high resolution mapping ability. However, the raw sonar records are subject to systematic errors, random noise and outliers. In this paper Kalman filtering approach to generating optimal estimates of bottom surface from a noisy raw sonar records is presented. The experiment on the surface indicates that after applying the Kalman filtering technique the outliers of raw records can be efficiently detected and removed. Moreover in the same time, the two-step Kalman filtering method is applied, which aims to filter every multibeam sonar swath and enable 3D seabed visualization in real time. The 3D bottom relief before, and after the filtering method application is also presented.
Źródło:
Hydroacoustics; 2003, 6; 189-194
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real world data supporting identification of the pharmacist’s role in obesity and overweight treatment in Poland – a preliminary report
Autorzy:
Drozd, Mariola
Bułaś, Lucyna
Szkultecka-Dębek, Monika
Skowron, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/454892.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
overweight
obesity
pharmaceutical care
treatment, real world data
Opis:
Introduction. Obesity is a significant health and economic problem, both for the patient and the health care system. An essential element in the prevention and treatment of each disease is the engagement of all groups of healthcare professionals. In our study, we performed an analysis of the real world data, obtained from a survey of the medical and socioeconomic problems associated with overweight and obesity. We aimed to identify the pharmacist’s role in the management of overweight and obese patients, including their individualized education in an outpatient setting. Material and methods. The study material consisted of responses obtained from a specially designed questionnaire. Our findings indicate that the study patients had easy access to a pharmacist’s professional knowledge, relevant to comprehensive treatment of obesity. In addition, our data indicates a lack of patient knowledge of a healthy lifestyle and an inability to implement such knowledge in practice. Results. The community pharmacist should actively provide support to patients with obesity (including the primary obesity and those who want to lose excessive body mass for health-related and also for aesthetic reasons) and the management of their weight. The results of our study should be considered as an introduction to further research to facilitate the understanding of problems and expectations of patients and to prepare pharmacists to perform pharmaceutical care (PC) in this regard. Conclusion. One of the potential options to protect society against the obesity epidemic is an education about the risks inherent to obesity and promotion of a healthy lifestyle.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 3; 192-199
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time data acquisition based on common use interfaces at Matlab and embedded system
Autorzy:
Sieczkowski, K.
Sondej, T.
Powiązania:
https://bibliotekanauki.pl/articles/397757.pdf
Data publikacji:
2016
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
data acquisition
real-time
Matlab
serial communication
data processing
akwizycja danych
czas rzeczywisty
komunikacja szeregowa
przetwarzanie danych
Opis:
The article presents the tests of method for real-time data acquisition from embedded systems using Matlab software. Data transmission is performed using several common use interfaces: UART/USB, Ethernet, Bluetooth and WiFi. The article includes a description of a protocol, measuring station based on two types of embedded system, implementing the proposed protocol, as well as a description of the algorithm of test programs. Experimental studies were performed using a STM32F4 microcontroller and Raspberry PI-3 single-board computer. Executed tests related: (1) the average transmission time, (2) the effective throughput of a full cycle of data exchange, (3), the required working time of Matlab to handle the transmission, and (4) the stability of the program timer used for periodic data transmission calls. Experimental studies have shown that it is possible efficient data exchange between the embedded system and Matlab while maintaining the real-time requirements.
Źródło:
International Journal of Microelectronics and Computer Science; 2016, 7, 3; 100-108
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Failure risk analysis of water distributions systems using hydraulic models on real field data
Autorzy:
Studziński, Andrzej
Pietrucha-Urbanik, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/95758.pdf
Data publikacji:
2019
Wydawca:
Fundacja Ekonomistów Środowiska i Zasobów Naturalnych
Tematy:
zaopatrzenie w wodę
awaria
model hydrauliczny
wskaźnik ryzyka
analiza niezawodności
water supply
failure
hydraulic model
risk indicator
reliability analysis
Opis:
At this paper the analysis of failure risk in the two water supply systems in the south-eastern Poland is presented. For this purpose the hydraulic models of the water networks created in the EPANET 2 on the basis of data obtained from the water networks operation were used. The consequences of failure of individual pipelines were determined. The areas that are most vulnerable to pressure fluctuations in the water supply system resulting from the failure of these pipelines, were located.
Źródło:
Ekonomia i Środowisko; 2019, 1; 152-165
0867-8898
Pojawia się w:
Ekonomia i Środowisko
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of the transmission-disequilibrium test for the detection of quantitative trait loci in livestock
Autorzy:
Szyda, J
Liu, Z.
Wild, V.
Powiązania:
https://bibliotekanauki.pl/articles/2044224.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transmission-disequilibrium test
German Holstein cattle
chromosome localization
milk production
power
simulated data
population
real data
detection
dairy cattle
simulation system
Opis:
The transmission-disequilibrium test (TDT) is a model-free method to detect linkage between a marker and a trait locus. Originally developed to map disease genes in human genetics, this statistic has been recently extended to deal with quantitative characters. The emphasis of current research is on investigating statistical properties of the test applied to data from livestock populations. For various constellations of sample parameters, it is shown via simulation that the empirically derived null hypothesis distribution of TDT remains in good agreement with its asymptotic distribution while its power is satisfactory only for very close linkage. TDT is then applied to a real data set from milk production data of a dairy cattle population.
Źródło:
Journal of Applied Genetics; 1998, 39, 4; 309-319
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of leaching kinetics modelling to a gold cyanide leach plant by using real plant data
Autorzy:
Sayiner, B.
Powiązania:
https://bibliotekanauki.pl/articles/109738.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
gold
cyanide
leach
kinetics
model
Opis:
Gold cyanide leach kinetics modeling was applied to the Bergama Ovacik gold cyanide leach plant in Turkey by processing the real plant data without need of any laboratory work. For this aim, solid ore samples were taken from each leaching tanks and analysed for gold contents as Au ppm while plant variables such as solid % concentrations in each tank, feed rate of plant as megagrams per hour (Mg/h), slurry flow rate as m3/h and the slurry residence times in each tank calculated and noted for modelling study. Five sampling work performed at plant at different times. Each sampling data were modelled seperately by the Anglo-American Research Laboratories (AARL) leach kinetics model to obtain five seperate model parameters and regression coefficient (R2) values. Then, total five sampling data were all together modelled to obtain just one model equation and R2 value to represent the plant generally. All R2 values were above 0.90 indicating that the AARL gold leaching kinetics model fits well on real plant leaching conditions. By using the model parameters, the residual gold contents in each tank were predicted for different possible ore feed rate tonnages such as 80, 90, 100, 110 and 120 megagrams per hour. Thus, leaching recoveries for any ore feed rate would be estimated for possible tonnage increases in the future.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 109-114
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spanning Trees of the World Trade Web: Real-World Data and the Gravity Model of Trade
Autorzy:
Skowron, P.
Karpiarz, M.
Fronczak, A.
Fronczak, P.
Powiązania:
https://bibliotekanauki.pl/articles/1388204.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.75.-k
89.65.Gh
89.65.-s
Opis:
In this paper, we investigate the statistical features of the weighted international-trade network. By finding the maximum weight spanning trees for this network we make the extraction of the truly relevant connections forming the network's backbone. We discuss the role of large-sized countries (strongest economies) in the tree. Finally, we compare the topological properties of this backbone to the maximum weight spanning trees obtained from the gravity model of trade. We show that the model correctly reproduces the backbone of the real-world economy.
Źródło:
Acta Physica Polonica A; 2015, 127, 3A; A-123-A-128
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of usefulness of real estate data contained in the register of prices and values of real estates
Autorzy:
Zyga, J.
Powiązania:
https://bibliotekanauki.pl/articles/101105.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
cadastre
databases
real estate prices
prices
values register
Opis:
The paper, as a part of broader studies on the practical usefulness of public registers enclosing the databases on real property, in tasks related to the property appraisal, includes results of research on the scope of data collected in the Register of Prices and Values of Real Estates and its essential relationship with the needs of appraisal in comparative approach. The appraisal procedures need to recognise the features of sold properties that can have an influence on the property price variability. Evaluations of these features underlie a detailed local market analysis. Therefore, the degree of meeting the appraisal needs by the above mentioned Register data was submitted to an examination. Presented analyses are demonstrated on the examples of extracts of registers, conducted by the offices of the district authorities in Lublin Voivodeship. In the summary, a generalized picture of accomplishment of governmental tasks in the mentioned scope was presented. Needs of changes in the scope of institutionally collected real estate market data, as well as possible ways of their implementation, were also indicated.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/1; 1017-1030
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Streaming Real-time Data in Distributed Dispatcher and Teleinformation Systems for Visualization of Multimedia Data of the Border Guard
Autorzy:
Blok, M.
Czaplewski, B.
Kaczmarek, S.
Litka, J.
Narloch, M.
Sac, M.
Powiązania:
https://bibliotekanauki.pl/articles/116615.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
border guard
transport telematics
events visualization post
distributed dispatcher
multimedia data
real-time data
teleinformation systems
visualization
Opis:
Surveillance of the sea borders is a very important task for the Border Guard. Monitoring of country maritime border is an important task of the Border Guard. This task can be facilitated with the use of the technology enabling gathering information from distributed sources and its supervision and visualization. This task can be accomplished using a technology that allows to collect information from distributed sensors of different types, unify the collected information, and present the synchronized data. The system presented in the paper is an extension and enhancement of the previously developed distributed map data exchange system. The added functionality allows to supplement the map data with multimedia (telephone and radio calls, video (cameras), photos, files, SMS/SDS) and presentation of current and archival situation on a multi-display screen in the Events Visualization Post. In the paper, the system architecture, functionality and main system elements are described and supported with preliminary analysis and test results.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 217-229
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Significance of real-time petro-physical data for an optimal remote geosteering operation in complex geological reservoirs
Autorzy:
Amer, Muhammad Attique
Ehsan, Muhsan
Akhtar, Muhammad Javid
Powiązania:
https://bibliotekanauki.pl/articles/2055849.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
remote geosteering
integrated real-time data
logging while drilling
collaborative decision making
reservoir management
Opis:
In the last decade, the oil industry has transitioned from primarily drilling vertical wells to a majority of extended reach complex horizontal wells with help of geosteering techniques for better reservoir and production efficiencies. The overall objective of geosteering and well placement has helped to maximize reservoir contact by the keeping well trajectory in the pay zone with the help of quality real-time data, especially in these uncertain times of pandemic due to COVID-19. This paper illustrates the immense impact of real-time data feeds (special logging tools/images) at operation centers with the full remote expert support of multidisciplinary teams. The proper data communication mechanism is also helpful to share the information across asset teams in a timely manner to drill complex wells remotely. To achieve the desired geosteering objectives, experts monitor and evaluate the real-time data in a landing well accurately in the pay horizon by designing the well path which considers geological variables like (reservoir architecture, permeability and porosity distribution, and fluid contacts) which further helps update the reservoir models in real-time based on the latest subsurface information for better reservoir management and timely decision making.
Źródło:
Geology, Geophysics and Environment; 2021, 47, 3; 125--130
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing real-time GNSS data streams for supplying the GOP Data Center
Autorzy:
Douša, J.
Bartošová, P.
Powiązania:
https://bibliotekanauki.pl/articles/225092.pdf
Data publikacji:
2008
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
system nawigacji satelitarnej
nawigacja satelitarna
GNSS
satellite navigation system
satellite navigation
Źródło:
Reports on Geodesy; 2008, z. 1/84; 35-40
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time interpolation of streaming data
Autorzy:
Dębski, Roman
Powiązania:
https://bibliotekanauki.pl/articles/1839246.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
streaming algorithm
online algorithm
spline interpolation
cubic Hermite spline
Opis:
One of the key elements of the real-time C 1 -continuous cubic spline interpolation of streaming data is an estimator of the first derivative of the interpolated function that is more accurate than those based on finite difference schemas. Two such greedy look-ahead heuristic estimators, based on the calculus of variations (denoted as MinBE and MinAJ2), are formally defined (in closed form), along with the corresponding cubic splines that they generate. They are then comparatively evaluated in a series of numerical experiments involving different types of performance measures. The presented results show that the cubic Hermite splines generated by heuristic MinAJ2 significantly outperformed those that were based on finite difference schemas in terms of all of the tested performance measures (including convergence). The proposed approach is quite general. It can be directly applied to streams of univariate functional data like time-series. Multi-dimensional curves that are defined parametrically (after splitting) can be handled as well. The streaming character of the algorithm means that it can also be useful in processing data sets that are too large to fit in the memory (e.g., edge computing devices, embedded time-series databases).
Źródło:
Computer Science; 2020, 21 (4); 513-532
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie rewizji danych w procesie modelowania
Autorzy:
Ziembińska, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/543640.pdf
Data publikacji:
2017
Wydawca:
Główny Urząd Statystyczny
Tematy:
data revisions
real-time data
national accounts
rewizje danych
dane w czasie rzeczywistym
rachunki
narodowe
Opis:
Artykuł ma na celu przedstawienie i wstępną analizę nowego — skonstruowanego na podstawie biuletynów statystycznych GUS — zbioru danych w czasie rzeczywistym (real-time data) dla polskiej gospodarki, obejmującego zmienne makroekonomiczne. Zbiór ten umożliwia odpowiedzi na pytania dotyczące procesu rewizji, który wpływa nie tylko na spójność danych, ale także na statystyczne własności modeli ekonometrycznych i oparte na nich wnioskowanie. W szczególności omówiono i wyodrębniono rewizje metodologiczne, co umożliwia ich analizę statystyczną oraz weryfikację przyczyn nieoczekiwanych rewizji niemetodologicznych. Badanie wskazuje, że dla istotnej grupy zmiennych rewizje są systematyczne. Wynikają one z redukcji błędu pomiaru, nie zaś napływu nowych informacji, co ma znaczące konsekwencje dla modelowania.
This study aims to present the new real-time set of macroeconomic data for the Polish economy constructed on the basis of the monthly Statistical Bulletins published by the Central Statistical Office. This dataset gives answers to many important questions on the revision processes which have an influence on the consistency of data as well as effects on attributes of econometric models and statistical inference. In particular, in this article methodological revisions were discussed and their types were specified. It is a base for the statistical analysis and verification of reasons of unexpected non-methodological revisions. The research indicates that in the significant group of variables revisions are systematic. This is a result of the error measurement reduction, not the accessibility of new information which has significant implications for modeling.
Źródło:
Wiadomości Statystyczne. The Polish Statistician; 2017, 2; 5-30
0043-518X
Pojawia się w:
Wiadomości Statystyczne. The Polish Statistician
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the efficiency of a novel algorithm for the choice of variables in cluster analysis on real world data sets
Autorzy:
Korzeniewski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/658865.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Opis:
W artykule badana jest efektywność algorytmu do wyboru zmiennych w analizie skupień zaproponowanego przez Autora na zbiorach danych ze świata realnego. Ocena tego algorytmu na syntetycznych zbiorach danych w postaci mieszanin rozkładów normalnych była przedmiotem innego badania – algorytm spisał się dobrze. Ideą algorytmu jest wybieranie jako istotnych tych zmiennych, których wariancja nie zmniejsza się tak bardzo jak wariancja zmiennych maskujących po zastosowaniu jednego kroku procedury średniego przesunięcia do wszystkich obserwacji zbioru danych.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2010, 235
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The lagged effect of air pollution on human eosinophils: a distributed lag non-linear model
Autorzy:
Ding, Zhaojun
Xie, Zhen
Su, Yang
Qi, Jiying
Cui, Bin
Powiązania:
https://bibliotekanauki.pl/articles/2116610.pdf
Data publikacji:
2020-04-30
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
air pollution
gender difference
eosinophils
real-world data
lagged effect
distributed lag non-linear model
Opis:
ObjectivesThe aim of this study was to determine the lag between exposure to air pollutants and changes in human eosinophil counts.Material and MethodsThis was a retrospective study employing 246 425 physical examination records dated December 2013 – December 2016 from Chengdu, China. The authors determined the prevalence of individuals with eosinophil counts above the normal reference range each day. A distributed lag non-linear model was used to evaluate the lagged effect of each air pollutant on eosinophil counts. The lagged effects of each air pollutant were counted and presented with smoothing splines.ResultsThe effects of air pollutants such as particulate matter (PM2.5, aerodynamic diameters <2.5 μm; PM10, aerodynamic diameters <10 μm), nitrogen dioxide (NO2) and ozone (O3) were evaluated. In women, the effects of PM2.5 (RR = 1.154, 95% CI: 1.061–1.255) and PM10 (RR = 1.309, 95% CI: 1.130–1.517) reached the maximum values on lag day 0. In men, there was no significant effect of PM2.5, but significant effects of PM10 were found for lag days 20–28. The effects of NO2 and O3 on eosinophils were not statistically significant for either gender.ConclusionsThe air pollutants of PM10 have a significant effect on human eosinophils for both women and men, but with different temporal patterns, with women showing a lag of 0–5 days and men showing a lag of 20–28 days. In addition, PM2.5 was significant for women with a lag of 0–3 days but it was not significant for men.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2020, 33, 3; 299-310
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 114

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