Informacja

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

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

Wyszukujesz frazę "discontinuity" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 53
Tytuł:
Scattering of Sound Waves in Two Stepped Non-uniformly Lined Duct
Autorzy:
Tiryakioglu, Ayse
Demir, Ahmet
Powiązania:
https://bibliotekanauki.pl/articles/177113.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Wiener-Hopf
scattering matrices
step discontinuity
impedance discontinuity
duct
Opis:
Scattering of sound waves in two stepped cylindrical duct which walls are coated with different acoustically absorbent materials is investigated by using Wiener-Hopf technique directly and by determining scattering matrices. First, by using Fourier transform technique we obtain a couple of modified Wiener-Hopf equations whose solutions involve four sets of infinitely many unknown expansion coefficients providing systems of linear algebraic equations. Then we determine scattering matrices of the problem and we state the total transmitted field by using generalized scattering matrix method. Numerical results are compared for different parameters.
Źródło:
Archives of Acoustics; 2020, 45, 3; 511-520
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Micromachining Processes Using Data in the Format and Geometric Characteristics of Micro-Chips
Autorzy:
Kacalak, W.
Tandecka, K.
Rypina, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/99434.pdf
Data publikacji:
2015
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
microfinishing
microchip
discontinuity
Opis:
Studies on micro-chips formed in the process of micromachining, including grinding and microfinishing using abrasive films, were conducted. Geometric characteristics of the micro-chips were analyzed and the presence of very long chips compared to their width was observed. One also reported the presence of very high temperatures in the treatment zone despite the applied cooling, which resulted in the formation of spherical chips. The occurrence of two characteristic spherical chip structures was observed followed by evaluation of their chemical composition. Based on the tabular structure of band chips, characteristic micro-discontinuities in the microcutting process were determined.
Źródło:
Journal of Machine Engineering; 2015, 15, 4; 59-68
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Introduction
Autorzy:
Sujecka, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/508942.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Tematy:
Macedonia
Balkans
continuity
discontinuity
Opis:
IntroductionThe text presents the leading subject of the issue, and discusses the question of cultural dis-contiuity, with special interest to its Balkan context.
Źródło:
Colloquia Humanistica; 2012, 1
2081-6774
2392-2419
Pojawia się w:
Colloquia Humanistica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of litho- and pedogenic processes on Luvisols formation of selected area of Vistula Glaciation
Autorzy:
Jaworska, H.
Dąbkowska-Naskręt, H.
Kobierski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060473.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
luvisols
lithological discontinuity
lessivage
glacial sediments
Opis:
The objective of the study was to determine the effect of litho- and pedogenic processes on soils of the selected area of Vistula Glaciation, based on profile distribution of unweathered components such as titanium, zirconium and silica in relation to their morphology, mineralogy, micromorphology and physicochemical properties. The predominant type of soilin the study area are Luvisols. Analysis of texture allowed to classify the investigated soils to sandy silts with loamy material as their subsoil. In the bulk soil silica dominates and its content was in the range 71.4 to 88.6%. The content of TiO2 within the profiles is fairy similar, without clear patterns in the profile distribution. The total content of zirconium in the samples was in range of 95.13 to 212.15 mg x kg-1. In the profile distribution of zirconium higher content of Zr was observed in the upper horizons compared to the top layerin all of theanalysed profiles, indicating different origin of soil material. Statistical analysis showed positive correla- tion between the total content of zirconium and the content of fraction 0 0.05-0.002 mm (correlation coefficient value: 0.692384; significance level - p < 0.05) and negative correlation between zirconium and clay content (correlation coefficient: -0.668157; p < 0.05). The lithologic discontinu i ty within profiles of the investigated soils has been additionally has proved by X-ray analysis of the clay fraction. The micromorphological analysis confirmed the complex genesis of the studied soils. The results of the study clearly showed an overall inhomogeneity and stratification of the soils. Studied Luvisols did not form as weath- ering product of homogeneous bedrock. Changes in granulometric and chemlcal composition within soil profiles are the consequence of translocation of clay fraction during lessivage as well as lithologic discontinul ty of the solum.
Źródło:
Geological Quarterly; 2014, 58, 4; 685--694
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arithmology and monadology of Nikolai Bugaev
Autorzy:
Drozdek, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2142668.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
arithmology
monadology
continuity
discontinuity
Leibniz
Solovyov
Opis:
Nikolai Bugaev was a mathematician keenly interested in philosophy. He stressed the role of discontinuity in his mathematical research that he called arithmology. He also emphasized the importance of discontinuity in nature which he embodied in his version of monadology. The article discusses the viability of his philosophical investigations.
Źródło:
IDEA. Studia nad strukturą i rozwojem pojęć filozoficznych; 2018, 30/1; 241-258
0860-4487
Pojawia się w:
IDEA. Studia nad strukturą i rozwojem pojęć filozoficznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nieciągłości geometryczne obrabianych elementów a cechy struktury geometrycznej powierzchni
Geometric discontinuities of workpieces and the features of geometric structure of surface
Autorzy:
Słomion, Małgorzata
Wojciechowski, Andrzej
Matuszewski, Maciej
Polishchuk, Oleg
Powiązania:
https://bibliotekanauki.pl/articles/404434.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo AWART
Tematy:
geometric discontinuity
machining
surface geometric structure
roughness
Opis:
The surface geometric structure largely determine the functional characteristics of machine elements and their tribological characteristics. In this paper the influence of geometric discontinuities, such as holes and grooves on the features of surface geometric structure were presented. This impact was assessed on the basis of surface roughness measurements. The conducted experimental verification showed the influence of geometric discontinuities on the features of geometric structure of machined surface.
Struktura geometryczna powierzchni w dużym stopniu determinuje cechy użytkowe elementów maszyn i ich charakterystyki tribologiczne. W artykule przedstawiono wpływ nieciągłości geometrycznych typu otwór oraz rowek na cechy struktury geometrycznej powierzchni. Ocenę tego wpływu dokonano w oparciu o pomiary chropowatości powierzchni. Przeprowadzona weryfikacja doświadczalna wykazała wpływ nieciągłości geometrycznych na parametry opisujące strukturę geometryczną powierzchni.
Źródło:
Obróbka Metalu; 2019, 3; 32-37
2081-7002
Pojawia się w:
Obróbka Metalu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Waves in elastic materials and structures
Autorzy:
Wesołowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/332103.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
wave propagation
discontinuity
reflection and propagation speed
Opis:
The mathematical description of waves propagation in elastic materials and structures is presented. Particularly, the considerations concern the water as a transmission medium for acoustic waves. The following issues are discussed: discontinuity, reflection, and propagation speed, among others.
Źródło:
Hydroacoustics; 2015, 18; 167-179
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis of jointed rock slopes using geomechanical, kinematical, and limit equilibrium methods: the Chouf Amar career, MSila, NE Algeria
Autorzy:
Farid, Zahri
Riheb, Hadji
Karim, Zighmi
Younes, Guesmi
Rania, Boudjellal
Aniss, Mahleb
Powiązania:
https://bibliotekanauki.pl/articles/89073.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
discontinuity
slope stability
limestone quarry
RMR
FEM
Opis:
Many open-cast mines in Algeria are regularly affected by instabilities that disrupt the exploitation activity, such as Chouf Amar's career where recurrent failures are caused by the combined action of a number of predisposition and triggering factors. I this study we uses a commbined-Geomechanical, Kinematical, numerical and limit equilibrium analysis to evaluate the behaviour of the discontinuous rock masses in open pit mine, and we chooses the Chouf Amar career as a case study. We determines nine main sets of discontinuities in the three main facies of the stone-pit. We proved also that the quarry suffers from various types of failures and that blasting declines the values of safety factor. We find out the causes of the 2009 slip-incident. By this combined approaches we have made it possible to optimize operations and to improve career productivity while ensuring the safety of equipment and personnel.
Źródło:
Mining Science; 2019, 26; 21-36
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges and Opportunities for the Future of Media and Mass Communication Theory and Research: Positionality, Integrative Research, and Public Scholarship
Autorzy:
Deuze, Mark
Powiązania:
https://bibliotekanauki.pl/articles/2042948.pdf
Data publikacji:
2021-06-21
Wydawca:
Polskie Towarzystwo Komunikacji Społecznej
Tematy:
media studies
mass communication theory
continuity
discontinuity
infodemic
Opis:
In this essay I intend to tell a story of media studies and mass communication research as a field, based on the work of the late Denis McQuail – and that of editing the new edition of his seminal handbook McQuail’s Media and Mass Communication Theory (McQuail & Deuze, 2020). Using McQuail’s historical storytelling method, I specifically look at the challenge for the field in the context of a global pandemic alongside an infodemic, at a time when the whole world faces the consequences of recurrent lockdowns, social distancing measures, and institutional pressures to stay at home. Media studies and (mass) communication research, while having a distinct narrative, as a field has only just begun to articulate its relevance to society – we have only just started to tell our story. Using developments in understanding the self as a research tool, the implementation of integrative research designs, and calls for engaged and public scholarship, the paper outlines challenges and opportunities for what we can do with our field.
Źródło:
Central European Journal of Communication; 2021, 14, 1(28); 5-26
1899-5101
Pojawia się w:
Central European Journal of Communication
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pedagogical notion of (dis)continuity in learning and its critical-pedagogical potential
Autorzy:
Mišić, Magdalena
Komar, Zvonimir
Powiązania:
https://bibliotekanauki.pl/articles/2098559.pdf
Data publikacji:
2021-10-27
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
discontinuity
negativity
learning
pedagogy
critical subject
critical theory
Opis:
The goal of this paper is to research the pedagogical notion of discontinuity in learning, its pedagogical importance and discover the notion of pedagogical subject that is complementary to it. Discontinuity is closely related to the idea of negativity in its existential sense. Discontinuity and negativity in learning are investigated in their various forms and meanings, in order to understand the pedagogical approach to these phaenomena. Our approach is differentiated by approaches based on “school success”, since pedagogical authors such as J.F. Herbart, J. Dewey and A. English see negativity and its pedagogical potential in an existential sense. Based on these insights, we further ask which kind of pedagogical subject can embody discontinuity and negativity in learning. We find that specific ideas of (critical) theory, (dialectical) knowledge and (critical) subject are needed for that. These ideas open often unexplored possibilities for pedagogical theory and practice.
Źródło:
Forum Pedagogiczne; 2021, 11, 1; 299-313
2083-6325
Pojawia się w:
Forum Pedagogiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of geometry and impedance variation on the acoustic performance of a porous material lined duct
Autorzy:
Masmoudi, A.
Makni, A.
Taktak, M.
Haddar, M.
Powiązania:
https://bibliotekanauki.pl/articles/281635.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
cylindrical duct
discontinuity effect
transmission
reflection
acoustic attenuation
Opis:
In this paper, the effect of geometry and impedance on the acoustic behavior of wall and lined cylindrical ducts is investigated using a numerical model which enables one to compute the reflection and the transmission coefficients of such ducts using the multimodal scattering matrix. From this matrix, the acoustic power attenuation is deduced. By using these tools, the effect of duct diameter increase and duct diameter decrease of the wall or lined duct section is studied. The numerical results are obtained for two configurations of wall and lined ducts. Numerical coefficients of transmission and reflection as well as the acoustic power attenuation show the relative influence of each type of variation.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 2; 679-694
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
National Income, Strategic Discontinuity, and Converging Trajectories of Macroeconomic Policy Initiatives: An Empirical Study of China
Autorzy:
Lux Tonn, Victor
Wendian, Chen
Li, Hsi C.
Powiązania:
https://bibliotekanauki.pl/articles/615888.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
strategic discontinuity
systemic changes
econometric testing
advancing economy
China
Opis:
The framework of converging trajectories of macroeconomic policy initiatives is employed in the context of strategic discontinuity to study the national income of an advancing economy. A model of systemic changes based upon an equation of production and consumption is presented. In this study of the Chinese economy of 1980-2014, over time, the dynamics of policy imbalance is found to decrease considerably, which is consistent with the decreasing trend of shrinking the differences among the impact coefficients of government consumption, private investment, and private consumption.
Źródło:
Przegląd Politologiczny; 2018, 4; 131-152
1426-8876
Pojawia się w:
Przegląd Politologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral Mapping Using Kernel Principal Components Regression for Voice Conversion
Autorzy:
Song, P.
Zhao, L.
Bao, Y.
Powiązania:
https://bibliotekanauki.pl/articles/177529.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
spectral mapping
overfitting
oversmoothing
discontinuity
kernel principal component regression
Opis:
The Gaussian mixture model (GMM) method is popular and efficient for voice conversion (VC), but it is often subject to overfitting. In this paper, the principal component regression (PCR) method is adopted for the spectral mapping between source speech and target speech, and the numbers of principal components are adjusted properly to prevent the overfitting. Then, in order to better model the nonlinear relationships between the source speech and target speech, the kernel principal component regression (KPCR) method is also proposed. Moreover, a KPCR combined with GMM method is further proposed to improve the accuracy of conversion. In addition, the discontinuity and oversmoothing problems of the traditional GMM method are also addressed. On the one hand, in order to solve the discontinuity problem, the adaptive median filter is adopted to smooth the posterior probabilities. On the other hand, the two mixture components with higher posterior probabilities for each frame are chosen for VC to reduce the oversmoothing problem. Finally, the objective and subjective experiments are carried out, and the results demonstrate that the proposed approach shows greatly better performance than the GMM method. In the objective tests, the proposed method shows lower cepstral distances and higher identification rates than the GMM method. While in the subjective tests, the proposed method obtains higher scores of preference and perceptual quality.
Źródło:
Archives of Acoustics; 2013, 38, 1; 39-45
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nieciągłość autobiografii. Pamiętam że. To, co wspólne I Georges’a Pereca
A discontinuity of autobiography. I remember by Georges Perec
Autorzy:
Poprawa, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1376058.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
autobiography
discontinuity
memory
everyday life
autobiografia
nieciągłość
pamięć
codzienność
Opis:
Georges Perec uprawiał różne formy pisarstwa autobiograficznego. Pamiętam że jest zbiorem 480 zapisów, całość oznacza nieciągłość pamięci i autobiografii. Pisarska koncepcja Pereca znalazła potwierdzenie w jednym z późniejszych tekstów Lejeune'a, który napisał, że nie wierzy już w pojedynczą autobiografię, lecz w teksty autobiograficzne.
Georges Perec's works represent a various forms of autobiographical writings. I remember is a collection of 480 records, whole book proves a discontinuity of memory and autobiography. In one of his latest works Philippe Lejeune writes he just don't believe in single autobiography, but in autobiographical texts.
Źródło:
Autobiografia Literatura Kultura Media; 2015, 4, 1; 113-116
2353-8694
2719-4361
Pojawia się w:
Autobiografia Literatura Kultura Media
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-Dimensional Analysis of a Landslide Process on a Slope in Carpathian Flysch
Autorzy:
Zabuski, Lesław
Powiązania:
https://bibliotekanauki.pl/articles/240990.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
Carpathian flysch
landslide
discontinuity
3D numerical calculations
displacement
Opis:
The paper presents a 3D (spatial) analysis of deformation processes in the landslide slope Bystrzyca in Szymbark near Gorlice (Low Beskid – Carpathians; N 49°37′ 09″, E 21°05′ 49″) carried out by the computer code FLAC3D based on the finite difference method. The numerical analysis was performed to determine the influence of the orientation of layers and discontinuities and of hydrogeological conditions on slope deformations and the failure mechanism during sliding processes. The massif is modeled as an elasto-plastic medium obeying the Coulomb-Mohr criterion. Two variants of hydrogeological conditions are analyzed, namely the “dry slope” (without water) and the “wet slope” (entirely saturated). The influence of the orientation of discontinuities (modeled as “ubiquitous”) on the landslide mechanism is investigated as well. Few orientations of discontinuities with respect to the dip direction of the slope surface are considered, namely consequent, insequent, and subsequent (two variants in each case). The results show a clear impact of the pattern of discontinuities and hydrogeological conditions on the deformational behavior of the landslide and the shape of the slip surface. The 3D approach and results of the numerical simulation of the landslide movement prove the necessity of 3D modeling in some cases.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2019, 66, 1-2; 27-45
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 53

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