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Tytuł:
«смена поколений» в русской поэзии XIX и ХХ вв.: опыт сравнительного текстологического анализа
Generation change in Russian poetry of the 19th and 20th centuries: a case study in comparative textual analyses
Autorzy:
Kotin, Michaił L.
Powiązania:
https://bibliotekanauki.pl/articles/1374177.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
poetry discourse
form-content correlation in poetry
continuity and conflict of generations
axiological connotations
Opis:
The paper attempts to provide an analyses of poetically-encoded discourse about generation change in selected verses written by outstanding Russian poets of the 19th and 20th century – Pushkin, Zhukovsky, Baratynsky, Esenin and Mayakovsky, under a partial comparison with similar motives appearing by the German poet Goethe. The central problem is the axiological assessment of continuity vs. conflict of generations as well as the general confrontation with the “challenge of time”, both from existential and socially determined perspectives. The concepts of positive vs. negative connoted changes and the problem of their acceptability in the analysed verses are presented by means of a formal-semantic description with a special stress on language entities denoting the conceptual sphere of time and generation change.
Źródło:
Przegląd Wschodnioeuropejski; 2020, XI, 2; 395-418
2081-1128
Pojawia się w:
Przegląd Wschodnioeuropejski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
21st Century Skills and Individual Basic Values of the Future IT Specialist: Education Perspective
Autorzy:
Pelekh, Yurii
Shlikhta, Ganna
Powiązania:
https://bibliotekanauki.pl/articles/29520772.pdf
Data publikacji:
2024-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
21st century skills
correlation
competence
IT specialists
values
Opis:
Given the reliance of the contemporary IT professional training process on a predetermined scenario for success outlined in educational programs and confined within local needs our research aimed to identify and examine effective ways of integrating spiritual and professional development for future specialists in the field of digital (IT) technologies. Our assumption was that the development of core values as a spiritual component of IT specialists influences the effectiveness of acquiring 21st century skills and shapes their professional competence. A correlational study was conducted to explore the relationship between the level of formation of core values in future IT specialists and the level of 21st century skills in these individuals. The research strategy was based on the application of distinct methods (Schwartz, S. H. (1992), Hixson, 2012, mathematical statistical methods – Kendall’s correlation analysis) to test the effectiveness of the author’s model. Its conceptual idea is to confirm the hypothesis that higher levels of 21st century skills correlate with higher levels of core values in future IT specialists. The results of the tasks revealed correlations between higher levels of 21st century skills and the core values of future IT specialists. This allowed confirming the leading idea of the research: Ukrainian students in IT specialties demonstrate the ability to acquire 21st century skills associated with values that support a “positive” vector in the functioning of an individual (benevolence, conformity, security, traditions, universalism, stimulation, and independence).
Źródło:
The New Educational Review; 2024, 75; 176-188
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
2D-Raman correlation spectroscopy as a method to recognize of the interaction at the interface of carbon layer and albumin
Autorzy:
Kołodziej, A.
Wesełucha-Birczyńska, Aleksandra
Moskal, Paulina
Stodolak-Zych, Ewa
Dużyja, Maria
Długoń, Elżbieta
Sacharz, Julia
Błażewicz, Marta
Powiązania:
https://bibliotekanauki.pl/articles/950923.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
multi-walled carbon nanotubes
pyrolytic carbon
carbon layers
raman microspectroscopy
plasma blood proteins
2D correlation
Opis:
In modern nanomaterial production, including those for medical purposes, carbon based materials are important, due to their inert nature and interesting properties. The essential attribute for biomaterials is their biocompatibility, which indicates way of interactions with host cells and body fluids. The aim of our work was to analyze two types of model carbon layers differing primarily in topography, and developing their interactions with blood plasma proteins. The first layer was formed of pyrolytic carbon C (CVD) and the second was constructed of multi-walled carbon nanotubes obtained by electrophoretic deposition (EPD), both set on a Ti support. The performed complex studies of carbon layers demonstrate significant dissimilarities regarding their interaction with chosen blood proteins, and points to the differences related to the origin of a protein: whether it is animal or human. However the basic examinations, such as: wettability test and nano sctatch tests were not sufficient to explain the material properties. In contrast, Raman microspectroscopy thoroughly decodes the phenomena occurring at the carbon structures in contact with the selected blood proteins. The 2D correlation method selects the most intense interaction and points out the different mechanism of interactions of proteins with the nanocarbon surfaces and differentiation due to the nature of the protein and its source: animal or human. The 2D correlation of the Raman spectra of the MWCNT layer+HSA interphase proves an increase in albumin β-conformation. The presented results explain the unique properties of the Clayers (CVD) in contact with human albumin.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 3; 74-83
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study of the oxide and elemental composition of ash from lignite burned at various temperatures – Konin Lignite Mine, Central Poland
Badania porównawcze składu tlenkowego i pierwiastkowego popiołów ze spalania węgla brunatnego w różnych temperaturach – Kopalnia Węgla Brunatnego KONIN w centralnej Polsce
Autorzy:
Chomiak, Lilianna
Widera, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1849655.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
ash yield
oxide composition
elemental composition
Pearson correlation
Clarke value
zawartość popiołu
skład tlenkowy
skład pierwiastkowy
korelacja Pearsona
wartość klarkowa
Opis:
Lignite still plays a key role in the production of electricity in Poland. About one-third of domestic electric energy comes from lignite burned in large power plants that produce megatons (Mt) of bottom ash and fly ash annually. Nearly 11 wt% of the total ash generated by the lignite-fired power industry in Poland comes from lignite extracted from the Konin Lignite Mine. Part of the ash escapes into the atmosphere, and the rest is utilized, which is expensive and often harmful to the environment; hence, geochemical studies of these ashes are fully justified and increasingly carried out. The lignite samples examined in this paper represent the entire vertical section of the first Mid-Polish lignite seam (MPLS-1) mined in opencasts at Jóźwin IIB, Drzewce, and Tomisławice. First, the samples were oxidized (burnt) at one of three temperatures: 100, 850, and 950°C; then the chemical composition of oxides and trace elements was determined according to the ASTM D6349-13 standard. The ashes were rich in SiO2 and CaO; Ba, Sr, and Cu dominated the trace element content. Among the harmful elements found, Pb is of most concern. Only a few elements (Ba, Cu, Pb, Sb) reached values higher than their corresponding Clarke values. Based on the results obtained, it can be concluded that the examined ashes are approximately as harmful to the environment as ashes from other lignite used to generate electricity. Moreover, the increased amount of CaCO3 in the MPLS-1 is beneficial in the process of natural desulphurization.
W ostatnich latach około jednej trzeciej polskiej energii elektrycznej pochodzi z węgla brunatnego, który jest spalany w wielkich elektrowniach. Powoduje to produkcję popiołów (żużla paleniskowego i popiołu lotnego) w łącznej ilości wyrażonej w milionach ton (Mt). Blisko 11% wag. popiołu produkowanego przez polską energetykę opartą na węglu brunatnym pochodzi z węgla wydobywanego przez Kopalnię Węgla Brunatnego Konin. Oczywiście, popiół jest składnikiem niepożądanym w węglu z wielu względów. Część popiołu może przedostać się do atmosfery, a pozostałą część należy poddać utylizacji, co jest kosztowne i często szkodliwe dla środowiska naturalnego. Stąd badania geochemiczne tych popiołów wydają się celowe i dlatego są coraz częściej przeprowadzane. Badane w tej pracy uśrednione próbki węgla reprezentują cały profil pierwszego środkowopolskiego pokładu węglowego (MPLS-1) eksploatowanego w odkrywkach: Jóźwin IIB, Drzewce i Tomisławice. Te próbki zostały najpierw utlenione/spalone w temperaturze: 100, 850 i 950°C. Następnie został określony ich skład chemiczny (tlenki i pierwiastki śladowe) według normy ASTM D6349-13. Badane popioły cechują się dominacją SiO2 i CaO, zaś w składzie pierwiastków śladowych przeważają: Ba, Sr i Cu. Natomiast wśród pierwiastków szkodliwych najważniejszy jest Pb. Wreszcie, tylko kilka z analizowanych pierwiastków (Ba, Cu, Pb, Sb) osiąga wartości wyższe niż wartości odpowiednich klarków. Na podstawie uzyskanych wyników można stwierdzić, że badane popioły są w przybliżeniu tak samo szkodliwe dla środowiska jak popioły z innych węgli brunatnych używanych do wytwarzania energii elektrycznej, a zwiększona ilość CaCO3 jest też korzystna w procesie naturalnego odsiarczania.
Źródło:
Gospodarka Surowcami Mineralnymi; 2020, 36, 4; 145-160
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A continuum individual based model of fragmentation: dynamics of correlation functions
Autorzy:
Tanaś, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/747252.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Configuration space
individual-based model
birth-and-death process
correlation function
scale of Banach spaces
Ovcyannikov method.
Opis:
An individual-based model of an infinite system of point particles in Rd is proposed and studied. In this model, each particle at random produces a finite number of new particles and disappears afterwards. The phase space for this model is the set Γ of all locally finite subsets of Rd. The system's states are probability measures on  Γ the Markov evolution of which is described in terms of their  correlation functions in a scale of Banach spaces. The existence and uniqueness of solutions of the corresponding evolution equation are proved.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2015, 69, 2
0365-1029
2083-7402
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A copula-based method for reliability sensitivity analysis of structural system with correlated failure modes
Oparta na pojęciu kopuły metoda analizy czułości niezawodnościowej systemu konstrukcyjnego o skorelowanych przyczynach uszkodzeń
Autorzy:
Hao, L.
Zhencai, Z.
Powiązania:
https://bibliotekanauki.pl/articles/301567.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
reliability
reliability sensitivity
correlation analysis
copula
niezawodność
czułość niezawodnościowa
analiza korelacji
kopuła
Opis:
Despite many advances in the field of computational reliability analysis, the efficient estimation of the reliability and reliability sensitivity analysis of structural systems with multiple failure modes remains a persistent challenge. The key to deal with the problem lies in the correlation modelling between failure modes. In this paper, the Archimedean copulas are used as an alternative to solve the high-dimensional dependence modeling problem. The probability characteristics of failure modes are described by stochastic perturbation technique, and the reliability index is estimated with the fourth-moment standardization method. Considering that the number of the potential failure modes of the structural systems are relatively large, the probabilistic network evaluation technique is adopted to reduce the computational complexity. The sensitivity analysis is then conducted using the matrix differential technology. The numerical examples show that the applied procedure is able to efficiently consider various failure modes of structural systems in probabilistic assessment and sensitivity analysis.
Mimo poważnych osiągnięć w dziedzinie komputerowej analizy niezawodności, skutecznaocena niezawodności i analiza czułości niezawodnościowej systemów konstrukcyjnych o wielu przyczynach uszkodzeń pozostają ciągłym wyzwaniem. Kluczem do rozwiązania problemu jest modelowanie korelacji między przyczynami uszkodzeń. W niniejszym artykule zastosowano kopuły Archimedesa jako alternatywny sposób rozwiązania problemu modelowania zależności wysoko wymiarowych. Charakterystyki prawdopodobieństwa dla przyczyn uszkodzeń opisano przy pomocy metody zaburzeń stochastycznych, zaś wskaźnik niezawodności oszacowano metodą standaryzacji momentu czwartego rzędu. Biorąc pod uwagę, że liczba potencjalnych przyczyn uszkodzeń systemów konstrukcyjnych jest stosunkowo duża, wykorzystano technikę oceny z zastosowaniem sieci probabilistycznych, która pozwala na zmniejszenie złożoności obliczeniowej. Następnie przeprowadzono analizę czułości przy użyciu metody macierzy równań różniczkowych. Przykłady liczbowe pokazują, że zastosowana procedura pozwala na skuteczną ocenę różnych przyczyn uszkodzeń systemów konstrukcyjnych w ramach oceny probabilistycznej oraz analizy czułości.
Źródło:
Eksploatacja i Niezawodność; 2015, 17, 3; 450-456
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A mechanism reliability analysis method considering environmental influence and failure modes’ correlation : a case study of rifle automaton
Autorzy:
Fang, Yi-chuan
Wang, Yong-juan
Sha, Jin-long
Gu, Tong-guang
Zhang, He
Powiązania:
https://bibliotekanauki.pl/articles/24200826.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
mechanism reliability
environmental influence
failure modes’ correlation
copula function
Kaplan-Meier estimation
rifle automaton
Opis:
In order to overcome the challenge of quantifying the influence of environmental conditions and the coexistence of multiple failure modes involved in mechanism reliability modelling under different environments. In this paper, we propose a method for the analysis of mechanism reliability that takes into account the influence of environmental factors and failure modes’ correlation, quantifies the influence of environmental factors as the random distribution and degradation path of parameters, and derives the Copula description of failure mode correlation from the historical data of environmental experiments. On the basis of the discrete mechanism dynamics model, the output parameters of the characteristic points are calculated, and the failure rate of each failure mode is calculated based on the failure criterion and the performance margin theory. Additionally, the dynamic change pattern of the mechanism reliability is compared with the Kaplan-Meier estimation of the corresponding environmental test history data to assess the validity of the calculation results. The reliability modelling problem of a motion mechanism of an automatic rifle automaton in a high and low temperature environment is applied to the method, and the reliability calculation results are close to those of Kaplan-Meier estimation of the test history data, and all are within the upper and lower bounds given by the reliability boundary theory, demonstrating the method's validity.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 166145
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A minimum spanning tree analysis of the Polish stock market
Autorzy:
Tomeczek, Artur F.
Powiązania:
https://bibliotekanauki.pl/articles/2159034.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
network analysis
minimum spanning tree
correlation network
stock market
COVID-19
Polska
Opis:
Aim/purpose - This article aims to explore the network topology of the stock market in Poland during the COVID-19 pandemic. Design/methodology/approach - Kruskal's algorithm was used to find the minimum spanning trees (MST) of three undirected correlation networks: MST1 (December 2019 - August 2021), MST2 (February 2020 - April 2020), and MST3 (June 2021 - August 2021). There were123 firms included in all three networks representing three key indexes (WIG20, mWIG40, and sWIG80). Findings - The comovements of stock prices varied between various periods of the pandemic. The most central firms in Poland were PEO, UNT, SPL, PKO, KGH, CCC, and PZU. WIG20 was the most influential stock index for all networks. During the turbulent period represented by MST2, many of Poland's largest companies have clustered around KGH at the center of the network. In contrast, MST3 is the least compact of the three networks and is characterized by the absence of a single strongly influential node. Research implications/limitations - Correlation networks are efficient at quantitatively describing the degree of interdependence of a stock. MST finding algorithms are a crucial method of analysis for correlation networks. However, a limitation of the study, inherent to undirected correlation networks, is the inability to determine the direction of influence that stocks have on each other. Originality/value/contribution - The results of the article contribute to the economic analysis of stock markets in several ways. First, it expands on Gałązka (2011) by including additional centralities and the dynamic aspect of changes in the topology during the COVID-19 pandemic. Second, it broadens the MST-based empirical research of stock markets by showing the emergence of the star topology during the period of high uncertainty in Poland. Third, it has practical applications for systemic risk assessment and portfolio diversification.
Źródło:
Journal of Economics and Management; 2022, 44; 420-445
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Code Family for QS-CDMA Visible Light Communication Systems
Autorzy:
Addad, M.
Djebbari, A.
Powiązania:
https://bibliotekanauki.pl/articles/308553.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
CDMA
visible light communications
zero correlation zone
zero cross correlation
Opis:
Visible light communication (VLC) is a promising technology for wireless communication networks. Optical code division multiple access (OCDMA) is a strong candidate for VLC-based applications. The predominant source of bit error in OCDMA is the multiple access interference (MAI). To eliminate MAI in synchronous OCDMA, zero cross correlation (ZCC) codes have been proposed. However, synchronization problems and multipath propagation introduce relative non-zero time delays. Therefore, the zero correlation zone (ZCZ) concept was introduced. In this paper, we propose a new method for generating ZCC codes. The proposed construction can accommodate any number of users with flexible Hamming weight. The numerical results obtained show that the proposed codes significantly reduce MAI, compared to ZCC, as well as ZCZ codes.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 3; 5-8
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Diminutive Wide-band MIMO Antenna with Frequency Agile Features for 4G and 5G Diverse Wireless Applications
Autorzy:
Mudda, Shivleela
K M, Gayathri
Mallikarjun, M
Powiązania:
https://bibliotekanauki.pl/articles/27311969.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Diversity gain (DG)
Defective ground structure (DGS)
Fractional bandwidth (FBW)
ITU (International Telecommunication Union)
INSAT
Frequency Reconfigurable antenna (FRA)
Multiple input multiple output (MIMO)
mutual coupling
isolation
5G
Envelope correlation coefficient (ECC)
Opis:
This paper demonstrates a low-profile, wide-band, two-element, frequency-reconfigurable MIMO antenna that is suitable for diverse wireless applications of 4G and 5G such as WLAN/Bluetooth (2.4–2.5 GHz), WLAN (2.4–2.484 GHz, 5.15– 5.35 GHz, and 5.725–5.825 GHz), WiMAX (3.3–3.69 GHz and 5.25–5.85 GHz), Sub6GHz band proposed for 5G (3.4–3.6 GHz, 3.6-3.8GHz and 4.4–4.99 GHz), INSAT and satellite X-band(6 to 9.6 GHz). Proposed MIMO favour effortless switching between multiple bands ranging from 2.2 to 9.4 GHz without causing any interference. Both antenna elements in a MIMO array are made up of a single module comprised of a slot-loaded patch and a defective structured ground. Two PIN diodes are placed in the preset position of the ground defect to achieve frequencyreconfigurable qualities. The suggested MIMO antenna has a size of 62 ×25 ×1.5 mm3. Previous reconfigurable MIMO designs improved isolation using a meander line resonator, faulty ground structures, or self-isolation approaches. To attain the isolation requirements of modern devices, stub approach is introduced in proposed design. Without use of stub, simulated isolation is 15dB. The addition of a stub improved isolation even more. At six resonances, measured isolation is greater than 18 dB, the computed correlation coefficient is below 0.0065, and diversity gain is over 9.8 dB.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 439--448
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new heuristic possibilistic clustering algorithm for feature selection
Autorzy:
Kacprzyk, J.
Owsinski, J. W.
Viattchenin, D. A.
Powiązania:
https://bibliotekanauki.pl/articles/384599.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
feature selection
fuzzy correlation measure
possibilistic clustering
heuristic possibilistic clustering
fuzzy cluster
Opis:
The paper deals with the problem of selection of the most informative features. A new effective and efficient heuristic possibilistic clustering algorithm for feature selection is proposed. First, a brief description of basic concepts of the heuristic approach to possibilistic clustering is provided. A technique of initial data preprocessing is described and a fuzzy correlation measure is considered. The new algorithm is described and then illustrated on the well-known Iris data set benchmark and the results obtained are compared with those by using the conventional, well-known and widely employed method of principal component analysis (PCA). Conclusions and suggestions for future research are given.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2014, 8, 2; 40-46
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Method for Predicting the Friction Sensitivity of Nitramines
Autorzy:
Keshavarz, M. H.
Hayati, M.
Ghariban-Lavasani, S.
Zohari, N.
Powiązania:
https://bibliotekanauki.pl/articles/358230.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
friction sensitivity
nitramine
correlation
safety
Opis:
This study presents a new simple correlation between friction sensitivity of nitramines and their molecular structures. This novel correlation can help chemists and chemical engineers to predict the friction sensitivity of new nitramines without using any experimental data, which is important for safety in industrial processes. The new correlation can also help to elucidate the mechanism of initiation of energetic materials by frictional stimuli. This new method assumes that friction sensitivity of a nitramine of general formula CaHbNcOd can be expressed as a function of the optimized elemental composition and the contributions of specific molecular structural parameters. The new correlation has root mean square and average deviations of 7.64 and 6.44 J, respectively, for 20 nitramines with different molecular structures. The proposed new method was also tested for 11 nitramines containing complex molecular structures.
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 2; 215-227
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A note on correlation coefficient between random events
Autorzy:
Stępniak, Czesław
Powiązania:
https://bibliotekanauki.pl/articles/729754.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
correlation coefficient between random events
correlation coefficient for random variables
synergy phenomenon
Opis:
Correlation coefficient is a well known measure of (linear) dependence between random variables. In his textbook published in 1980 L.T. Kubik introduced an analogue of such measure for random events A and B and studied its basic properties. We reveal that this measure reduces to the usual correlation coefficient between the indicator functions of A and B. In consequence the resuts by Kubik are obtained and strenghted directly. This is essential because the textbook is recommended by many universities in Poland.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2015, 35, 1-2; 57-60
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Approach for the Prediction of Electric Spark Sensitivity of Polynitroarenes Based on the Measured Data from a New Instrument
Autorzy:
Keshavarz, Mohammad Hossein
Powiązania:
https://bibliotekanauki.pl/articles/358523.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
electric spark sensitivity
RDAD
ESZ KTTV
polynitroarene
correlation
Opis:
This paper introduces two novel correlations for the assessment of the electric spark sensitivity of polynitroarenes based on a new instrument, marked as ESZ KTTV, which gives more reliable experimental data than a previous old system, marked as RDAD. The first correlation used the number of oxygen and chlorine atoms, as well as a correcting function that increases the predicted results based on elemental composition. Since the relationship between the measurements from ESZ KTTV and RDAD is not unequivocal, a second correlation can convert the reported data based on the RDAD system to the ESZ KTTV instrument. The second correlation can be applied to many available predictive methods, and provides the estimated results based on the RDAD instrument. For 34 polynitroarenes, where experimental values from both the RDAD and the ESZ KTTV instruments were available, the values of the root-mean-square deviation (RMSD) for the first and second correlations were 43.9 mJ and 36.0 mJ, respectively. Thus, due to the larger uncertainty in the measured data of the old RDAD system, both correlations provide more reliable data based on the ESZ KTTV instrument.
Źródło:
Central European Journal of Energetic Materials; 2019, 16, 1; 65-76
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Correlation for Predicting the Density of Tetrazole–N-oxide Salts as Green Energetic Materials through Their Molecular Structure
Autorzy:
Zohari, N.
Bajestani, I. R.
Powiązania:
https://bibliotekanauki.pl/articles/358082.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
tetrazole-N-oxide energetic compounds
density
correlation
multiple linear regression method
molecular structure
Opis:
In this study, a new and reliable model is derived for predicting the density of tetrazole N-oxide salts using molecular structure descriptors through multiple linear regression methods (MLR). The proposed model is based on the elemental, functional group and type of molecule descriptors. The coefficient of determination (R2) of the model was 0.9321 for 36 energetic tetrazole N-oxides with different molecular structures as an exploratoryset. The predictive ability of this model has been checked using a cross validation method (Q2 LOO = 0.9325 and Q2 LMO = 0.9324). The new correlation had a root mean square deviation (RMSD) of 0.033 g·cm−3 and an average absolute deviation (AAD) of 0.025 g·cm−3. This correlation also gave good predicted results for a further 10 energetic tetrazole N-oxides as a test set. The new reliable model can also be appliedfor designing novel energetic tetrazole N-oxides.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 4; 629-651
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł

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