Temat: DRIFT - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Mathematical Models and Computer Simulations of Aerial Spraying and Droplets Distribution in a Target Site
Autorzy:: Rowiński, Robert S.
Powiązania:: https://bibliotekanauki.pl/articles/36406214.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: agricultural aviation
aerial spraying
drift
Opis:: Mathematical models describing aerial spraying and the distribution of liquid droplets on a target were presented. Relationships based on “free models” with Gaussian distribution of droplet concentrations and “bound models” that account for the impact of disturbances in the velocity field behind agricultural aircraft were expanded, and the hybrid model too. The results of experimental studies were presented and compared with theoretical calculations. The “bound model” was found to be the most effective solution for describing the physical phenomena that accompany the aerial spraying process.
Źródło:: Transactions on Aerospace Research; 2019, 3 (256); 24-42
0509-6669
2545-2835
Pojawia się w:: Transactions on Aerospace Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Unsupervised labeling of data for supervised learning and its application to medical claims prediction
Autorzy:: Ngufor, C.
Wojtusiak, A.
Powiązania:: https://bibliotekanauki.pl/articles/305284.pdf
Data publikacji:: 2013
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: unsupervised learning
concept drift
medical claims
Opis:: The task identifying changes and irregularities in medical insurance claim payments is a difficult process of which the traditional practice involves querying historical claims databases and flagging potential claims as normal or abnormal. Because what is considered as normal payment is usually unknown and may change over time, abnormal payments often pass undetected; only to be discovered when the payment period has passed. This paper presents the problem of on-line unsupervised learning from data streams when the distribution that generates the data changes or drifts over time. Automated algorithms for detecting drifting concepts in a probability distribution of the data are presented. The idea behind the presented drift detection methods is to transform the distribution of the data within a sliding window into a more convenient distribution. Then, a test statistics p-value at a given significance level can be used to infer the drift rate, adjust the window size and decide on the status of the drift. The detected concepts drifts are used to label the data, for subsequent learning of classification models by a supervised learner. The algorithms were tested on several synthetic and real medical claims data sets.
Źródło:: Computer Science; 2013, 14 (2); 191-214
1508-2806
2300-7036
Pojawia się w:: Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparative analysis of meteorological conditions on the shores of Szczecin Lagoon
Autorzy:: Kasyk, Lech
Pleskacz, Krzysztof
Kapuściński, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/24202521.pdf
Data publikacji:: 2022
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: SAR
shipwreck drift modelling
Szczecin Lagoon safety
wind parameters modelling
wind parameters and forecasting
pollution drift modelling
Opis:: The definition of dynamic areas of searching for shipwrecks, and/or the movement of pollution across waters of Szczecin Lagoon first requires the knowledge and specification of hydro-meteorological conditions across the area. This article compares wind parameters from various sources of meteorological stations located close to Szczecin Lagoon. The wind speed and direction were obtained from Ueckermuende, I Brama Torowa (Urząd Morski Szczecin), and Kopice (wind meter of Szczecin Maritime Academy). Wind direction data analysis was based on directional statistics methods and tools.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 70 (142); 83--93
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Enhancing bubble bize prediction in flotation processes: a drift flux model accounting for frother type
Autorzy:: Leiva, Claudio
Acuña, Claudio
Luukkanen, Saija
Cruz, Constanza
Powiązania:: https://bibliotekanauki.pl/articles/24603667.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: drift flux flotation
surfactant
bubble terminal velocity
Opis:: This communication presents a methodology, based on a modified drift flux model, to determine bubble size distribution in column flotation. The modified drift flux model incorporates a surfactant-type parameter. This parameter considers the impact of surfactant on bubble hydrodynamics. The methodology aims to improve the accuracy of bubble size distribution prediction, which presents deviation depending on surfactant type (i.e. polyglycolic based or alcoholic base). Many authors have proposed different mathematical improvements to reduce de experimental data deviations in the presence of different surfactants. However, from 1988 to 2022, the determination coefficient, or the quality of the adjustments, from the proposed mathematical models is, at the most, 92% (relative error). The proposed methodology improves the quality of the adjustments to 98.6, adding a single parameter for groups of surfactants. This methodology incorporates a single parameter in the terminal velocity calculation that can compensate for the impact of surfactant type in bubble hydrodynamic (bubble skin friction or drag coefficient, bubble wake, bubble shape, bubble rigidity). This parameter is a function of the gas holdup calculated from gas velocity measured and the bubble size distribution calculated (deviated) from gas holdup and gas velocity measured. The methodology is validated with reported experimental results and proposed modifications from various authors. The confidence interval (2 σ) is reduced from 0.11mm to 0.05mm in the case of (Yianatos, Banisi, Ostadrahimi). In the case of the recently reported experimental results from Maldonado and Gomez, the confidence interval is reduced from 0.31 mm to 0.09 mm. These results improve bubble size estimation based on drift flux in column flotation, contributing to a better understanding of surfactant impact on bubble swarm hydrodynamics.
Źródło:: Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 178234
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A new method of frequency offset correction using coherent averaging
Autorzy:: Gajewski, P.
Łopatka, J.
Piotrkowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/308860.pdf
Data publikacji:: 2005
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: coherent averaging
jitter
drift
frequency offset correction
Opis:: This paper describes a new method of frequency offset correction to improve clock stability in communication systems where the temporary drift or jitter of phase angle is not accepted. This method bases on coherent spectral averaging with a special phase scanning algorithm. Achieved results show that proposed method is effective for strongly degraded signals. Method is useful for precise phase angle reconstruction in these systems where clock stability of the transceiver and receiver is insufficient.
Źródło:: Journal of Telecommunications and Information Technology; 2005, 1; 142-146
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Re-contextualising Catholic School Religious Education: Educating Young People Spiritually, Morally and Religiously for the 21st Century
Autorzy:: Rossiter, Graham
Powiązania:: https://bibliotekanauki.pl/articles/668333.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Papieski Jana Pawła II w Krakowie
Tematy:: religious education
spirituality
Catholic schools
ecclesiastical drift
Opis:: Philip Phenix’s (1964) book Realms of meaning: A philosophy of the curriculum for general education started the ever growing movement concerned with how school education might help young people in their search for meaning, purpose and values in times of rapid cultural change. Today, in globalised, digital, secularised culture, the importance and urgency of this role have never been greater. Religious Education, with core curriculum status in Catholic schools, has both credentials and precedents for studying directly the contemporary human quest for meaning to help resource the spirituality of young people, no matter what their religious disposition. But a ‘course correction’ is needed for the discourse of Catholic Religious Education which has ‘drifted’ almost so exclusively into ecclesiastical terminology that its educational credibility as a valuable spiritual/moral school subject has been eroded, creating an ever widening discontinuity with the realities of the classroom and young people’s spirituality. A more outward-looking and less Catholic-centric emphasis would help, without neglecting commitment to the faith tradition. While concerned with the Australian Catholic sector, the article may well have relevance to other countries and contexts.
Źródło:: The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II; 2020, 10, 1; 29-66
2391-6559
2083-8018
Pojawia się w:: The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Hydrome-metallurgical waste management: Turning metal-enriched waste into valuable resources
Autorzy:: Brožová, Silvie
Brož, Jiří
Ingaldi, Manuela
Powiązania:: https://bibliotekanauki.pl/articles/29521076.pdf
Data publikacji:: 2023
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: hydrometallurgy
metal-bearing waste
steel drift
waste management
Opis:: The convergence of hydrometallurgical waste management and the principles of the circular economy holds immense potential for addressing the challenges posed by metal-enriched waste. By turning waste into valuable resources through efficient metal extraction, this approach not only aligns with sustainable development goals but also contributes to the conservation of resources, reduction of waste, and the promotion of economic and environmental well-being. This article deals with the further possibilities of processing metal-bearing wastes in the form of steel drifts via hydrometallurgy. The main part of this research focuses on the development of suitable technology for the leaching of steel flakes to obtain selected non-ferrous metals, mainly zinc and lead, for economic and environmental reasons. Laboratory experiments are carried out to verify a suitable leaching agent in the form of high-temperature acid leaching, neutralizing leaching, and magnetic separation verified in lead seals. From the results of the experiments, a suitable technology for processing steel fumes is proposed.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2023, 75 (147); 107-113
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Frequency based islanding detection methods in power electronic converters
Autorzy:: Dmitruk, K.
Korzeniewski, M.
Sikorski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1193396.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: anti-islanding protection
active frequency drift
grid converter
Opis:: Frequency based methods developed to detect an islanding condition in modern power grid structures have been discussed. The condition may occur in power grid lines to which additional energy sources with power electronic converters have been connected such as solar panels or wind turbines. It is a hazardous operating state for grid workers and devices connected to the islanded part of the grid. Such a state results from the inability to control amplitude and frequency of basic harmonic of the grid voltage. An islanding problem in a power grid with additional small energy sources has been discussed. A basic passive and active islanding detection method have been presented and compared with known frequency based algorithms, namely active frequency drift and active frequency drift with a positive feedback algorithm. Finally, a laboratory test of the proposed islanding detection methods in a three-phase grid with an AC-DC converter has been conducted. To demonstrate differences between the tested methods, total harmonic distortion injected into the output converter current and detection time of islanding state have been measured.
Źródło:: Power Electronics and Drives; 2017, 2, 37/1; 27-41
2451-0262
2543-4292
Pojawia się w:: Power Electronics and Drives
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of Drift on Efficiency of Optimal Analog Adaptive Communication Systems with Feedback and Its Compensation
Autorzy:: Jędrzejewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/227312.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: communication systems
feedback
drift compensation
optimal adaptive estimation
Opis:: Results of analysis of drift influence on operation and efficiency of optimal analog adaptive communication systems with feedback and a new approach to drift compensation in these systems are presented in the paper. The proposed approach is based on application of the extended multidimensional adaptive algorithm that estimates simultaneously the value of a transmitted sample and the value of an unknown drift rate. The knowledge of the drift rate enables drift compensation and improves transmission efficiency of systems suffering problems related to drifts.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 1; 51-58
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The “Mysterious” Kazlauskas: Exploring Lithuania’s Most Frequent Surname
Autorzy:: Walkowiak, Justyna B.
Powiązania:: https://bibliotekanauki.pl/articles/971883.pdf
Data publikacji:: 2016-12-01
Wydawca:: Polska Akademia Nauk. Instytut Języka Polskiego PAN
Tematy:: surname frequency
Lithuanian surnames
surname loss
genetic drift
Opis:: The article presents the most frequent surname in Lithuania — Kazlauskas. Referring to the article “Mysterious Lewandowski” by K. Skowronek (2000), an attempt has been made to account for this frequency in three various ways. First, the principles behind the quantitative structure of anthroponomasticons (Zipf’s law) and the loss of surnames (genetic drift) are discussed. Then the Slavic origin of the surname under consideration has been highlighted as a typical trait of the majority of surnames in Lithuania. In connection with this fact, it has been stressed that caution must be exercised in proposing a thesis on its origin as a translation from Lithuanian on a mass scale, since this thesis requires plentiful empirical evidence. Finally, the etymology of the name is analyzed. Morphologically it is a typical surname derived from a toponym. This supposition is additionally supported by the existence in Poland of numerous localities called Kozłów, Kozłowo or similar name; these in turn are most likely to have been derived from appellative-based personal names of their owners or inhabitants, such as Kozieł.
Źródło:: Onomastica; 2016, 60; 175-186
0078-4648
Pojawia się w:: Onomastica
Dostawca treści:: Biblioteka Nauki

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