Temat: circularity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Noncircularity of Demodulated Radar Signal
Autorzy:: Rytel-Andrianik, R.
Powiązania:: https://bibliotekanauki.pl/articles/227136.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: quadrature demodulator
complex radar signals
properness
circularity
Opis:: The output of the quadrature demodulator is generally regarded as a complex signal that is circular if only the demodulator is well balanced. In the paper we analyze properties of quadrature demodulators, particularly digital one, and show that the output is noncircular also if the input signal is nonstationary. Then we find sources of this noncircularity and show that they stem from transients of the low-pass demodulator filter. This is quite important because nonstationary inputs are quite typical in radar where power of echoes depends strongly on range. In the first sections we also review complex random signals and properties of circularity and properness.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 3; 301-306
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Stone diversity in wild and cultivated olive trees (Olea europaea L.)
Autorzy:: Hannachi, Hédia
Gómez, José J. M.
Saadaoui, Ezzeddine
Cervantes, Emilio
Powiązania:: https://bibliotekanauki.pl/articles/956997.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: olea europaea
stone
diversity
roundness
circularity
size
tunisia
Opis:: The olive tree is represented in Tunisia by two varieties: var. sylvestris (wild olive trees) and var. europaea (cultivated olive trees including diverse cultivars). Seed (stone) size and shape analysis may provide the basis for relationships between varieties and cultivars as well as to study the responses to environmental conditions. A semi-automated method of image analysis allows to obtain data related with magnitudes descriptive of stone size and shape and to compare between wild and cultivated olives. Also, the effect of bioclimate on size and shape was analyzed in some cultivars. Stone size and shape presents high variability. In cultivated trees stones are larger. Mean seed image area is 0.38 and 0.75 cm² for wild and cultivated plants respectively. Roundness and circularity were compared as to their potential to define seed shape. Mean values were higher for circularity, but roundness is more variable reaching higher values in some individuals and varieties. Roundness is more useful to compare seed shape variations. In addition, climate factors affect the stone characteristics in cultivars; those of sub-humid region having larger stones. Phenotypic parameters of stone are discriminating parameters for the analysis of intra-specific, intra-varieties and intra-cultivars variability in Olea europaea.
Źródło:: Dendrobiology; 2017, 77; 19-32
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Kruskal-Wallis Test in Multiple Comparisons
Test Kruskala-Wallisa w porównaniach wielokrotnych
Autorzy:: Parys, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/905046.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: multiple comparisons
circularity
transitive and non-transitive effects
Opis:: In this paper we show that the Kruskal-Wallis test can be transform to quadratic form among the Mann-Whitney or Kendal τ au concordance measures between pairs of treatments. A multiple comparisons procedure based on patterns of transitive ordering among treatments is implement. We also consider the circularity and non-transitive effects.
Statystyka testu Kruskala-Wallisa przedstawiona jest w postaci formy kwadratowej z użyciem statystyki Manna-Whitneya lub miar konkordacji τ au Kendalla. Na bazie porównań wielokrotnych rozważamy przechodniość i nieprzechodniość efektów zbiegów w jednowymiarowej analizie wariancji.
Źródło:: Acta Universitatis Lodziensis. Folia Oeconomica; 2009, 225
0208-6018
2353-7663
Pojawia się w:: Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wastelands as an opportunity for managing Naples’ sustainable transition
Autorzy:: Berruti, Gilda
Palestino, Maria Federica
Powiązania:: https://bibliotekanauki.pl/articles/1019431.pdf
Data publikacji:: 2020-12-30
Wydawca:: Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:: wastescape regeneration
multilevel governance
waste circularity
transition management
Opis:: Circular economy offers new visions of how diversely urban spaces could be inhabited and managed. While the generation and management of waste is being treated through innovative practices, disused industrial, rural, and infrastructural areas are resistant to becoming included in a closed-loop cycle. They, in fact, establish wastelands that need to be completely re-imagined as a precondition for the transition. The fact of shifting the definition of a ’neglected area’ into a ‘wasteland’, in line with the metaphor of urban metabolism, could be of tactical importance for generating alternative policies and practices. In exploring how the transition impacts Naples’ urban region, the paper argues that turning wastelands into resources has the double potential of rehabilitating spaces and challenging the governance model in use, overcoming barriers in multiple sectors.
Źródło:: European Spatial Research and Policy; 2020, 27, 2; 33-42
1231-1952
1896-1525
Pojawia się w:: European Spatial Research and Policy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Co to jest kryterium identyczności?
What is the Criterion of Identity?
Autorzy:: Garbacz, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/2015849.pdf
Data publikacji:: 2003
Wydawca:: Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:: kryterium identyczności
zbiór
kołowacizna
criterion of identity
set
circularity
Opis:: The article contains the reporting definition for the criterion of identity, a classification of criteria of identity and the general conditions that criteria of identity should meet. The author suggests replacing the binary division of criteria of identity into one- and two-level ones with a ternary division into one level, mixed and two-level criteria. In this suggestion the key role is played by the definition of the range of relation. The article is concluded with a partial solution to the dispute between T. Williamson and E. Lowe over the value of one-level criteria of identity.
Źródło:: Roczniki Filozoficzne; 2003, 51, 1; 53-66
0035-7685
Pojawia się w:: Roczniki Filozoficzne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Rozwojowe współoddziaływanie pokoleń w rodzinie. Rodzice w wieku średnim i dorastające dzieci
Autorzy:: Bakiera, Lucyna
Powiązania:: https://bibliotekanauki.pl/articles/637203.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:: circularity, generativity, interactions in family, developmental crisis, Co-influence
Opis:: Developmental co-influence of generation in family. Parents in the middle-age and their adolescent childrenThe main attention in the article is paid to the problem of correspondence between the development of middle-aged adults and their adolescent child. The most important experience is achieved in the family, so the family is called the primary context of human development. Performing parental roles is an activity which is conducive to human development. The variety of changes in adolescence and their peculiarity cause the relationship between parents and adolescents to be problematic, so parents should be very sensitive and candid to children’s problems. They must be flexible as tutors. Activity in the middle-age, which contains different parents’ behaviour, such as being interested in their adolescent children, helping them in their maturation and permission to their growing autonomy bring about a sense of being creative and protect people in this stage of life from the selfish concentration on their own problems. So children could be a chance for a parent’s development, chance of satisfying the need of giving and creating in relation to the younger generation, the need characteristic of this developmental stage. On the other hand adolescents need their parents to grow to be adult, need their emotional and instrumental assistance.Middle-aged parents who lack awareness of the growing teenager's need of developmental changes do not stimulate the child's development and, more importantly, delay the child's and their own personal development. Reciprocal dependence both of the generation in this stage of developmental changes is evident in particular.
Źródło:: Psychologia Rozwojowa; 2008, 13, 1
1895-6297
2084-3879
Pojawia się w:: Psychologia Rozwojowa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: El desarollo de las expresiones analíticas en español: desde la lengua latina hasta la lengua española moderna
The development of analytical structures in Spanish: from Latin to modern Spanish
Autorzy:: Kida, Ireneusz
Castillo-Żarczyński, Luz
Powiązania:: https://bibliotekanauki.pl/articles/577195.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: analytical structures
word order circularity
Spanish
diachronic
synthetic to analytic
Opis:: In our paper we discuss the development of analytical/periphrastic structures in Spanish such as the periphrastic passive voice, the periphrastic comparison of the adjectictive, and the periphrastic future tense. Moreover, we discuss the process of phonetic attrition within the noun paradigm and the development of the SVO word order from the SOV one. We take into consideration a stretch of time that starts in the pre-Proto-Indoeuropean period and ends in the period of Modern Spanish. One of our conclusions is that the development of analytical structures is part of a cyclical process.
Źródło:: Linguistica Silesiana; 2011, 32; 33-43
0208-4228
Pojawia się w:: Linguistica Silesiana
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Odkształcenia sprężyste w wytłoczkach z blach spawanych laserem
Springback of drawpieces formed of tailor welded blanks
Autorzy:: Woźniak, H.
Plewiński, A.
Drenger, T.
Powiązania:: https://bibliotekanauki.pl/articles/211674.pdf
Data publikacji:: 2005
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:: odkształcenie sprężyste
blacha spawana laserowo
kołowość
springback
tailored welded blank
circularity
Opis:: Przeprowadzono badania doświadczalne w celu zaobserwowania wpływu spoiny w materiale wyjściowym na odkształcenia sprężyste w wytłoczkach cylindrycznych bez kołnierza i z kołnierzem, w wytłoczkach o kształcie L i elementach giętych o kształcie V. Badania przeprowadzono z blachami stalowymi ocynkowanymi E220BH, spawanymi laserem. Wpływ spoiny zaobserwowano w wytłoczkach cylindrycznych bez kołnierza i elementach giętych, natomiast w wytłoczkach cylindrycznych z kołnierzem i o kształcie L, czyli o większej sztywności, wpływ ten był niewielki i w praktyce możliwy do pominięcia. Badania przedstawione w tym opracowaniu są wycinkiem badań prowadzonych w ramach projektu INETFORSMEP.
Experiments have been carried out to determine the influence of a weld in the initial material on springback deformation in cylindrical drawpieces without and with a flange, in L-shape drawpieces and in V-shape bent elements. The tests were performed on zinc coated laser welded E220BH sheets. The welded joint influence has been observed in the cylindrical drawpieces without a flange and in the bent elements while that in the cylindrical drawpieces with a flange and in the L-shape ones was small and negligible in practice. The investigation presented in this paper are only a part of investigations of drawpieces springback carried out in project INETFORSMEP.
Źródło:: Obróbka Plastyczna Metali; 2005, 16, 3; 5-15
0867-2628
Pojawia się w:: Obróbka Plastyczna Metali
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Reproducibility of machine tools circularity test according to ISO 230-4 with respect to testing position
Autorzy:: Woźniak, M.
Majda, P.
Powiązania:: https://bibliotekanauki.pl/articles/94126.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: circularity
volumetric error
ball bar test
machine tool
kołowość
błąd objętościowy
obrabiarki
Opis:: In this paper circularity of three different machine tools by Virtual Machine was analyzed. To get circularity we make a ball bar test according to ISO 230-4. The test is very common in engineering for a quick diagnostic Computerized Numerical Control (CNC) technical conditions. We implemented earlier calculations of Volumetric Error in our Virtual Machine. Then we simulated testing of circularity of CNC machine tools. The place to take the test was chosen randomly from Uniform Distribution in three different kinds of machine tools. Those machines had different characteristics of kinematic errors and squareness and also different sizes of working space. We observed significant differences in the indicator (circularity) depending on the place where the test was taken. Moreover we showed that there was no reason to take the test in the center of working table.
Źródło:: Archives of Mechanical Technology and Materials; 2017, 37; 22-26
2450-9469
Pojawia się w:: Archives of Mechanical Technology and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Study on bubble characteristics of flotation column in hematite reverse cationic flotation process
Autorzy:: Wang, Weizhi
Han, Jikang
Powiązania:: https://bibliotekanauki.pl/articles/1450070.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: column flotation
bubble generator
GE-609
circularity
bubble diameter
bubble Sauter diameter
Opis:: In the self-designed flotation column simulation system, the foaming characteristics of the micro-bubble countercurrent contact flotation column used in the hematite cation column flotation process are systematically studied. The objective of this study is to investigate the bubble generation by a bubble generator in the flotation column. The bubble image was obtained by the high-speed camera recorder, and the bubble diameter was calculated and analyzed by image processing software. The distribution characteristics of the bubble size under different aeration conditions and with different reagent concentrations were investigated. The results show that as the aeration increases, the average diameter bubbles increases, the bubble size distribution changes from narrow to wide, and the number of small bubbles decreases. The cationic collector GE-609 can change the bubble shape. As the concentration increases, the bubble shape gradually changes from an irregular shape to a standard spherical shape. When the concentration of GE-609 exceeds 2.5 mg/dm3, the average circularity C of the bubbles in the bubble group stabilizes at 1, and the increase in concentration no longer changes the bubble shape. GE-609 also has an efficient foaming effect, as the concentration increases, the bubble diameter distribution changes significantly, the proportion of small bubbles increases, and the proportion of large bubbles decreases significantly. When the critical concentration is exceeded, the bubble diameter distribution probability density peak width no longer changes significantly. Compared with the two types of alcohol foaming agents, GE-609 produces a bubble Sauter diameter close to that of 2-octanol and slightly lower than terpineol.
Źródło:: Physicochemical Problems of Mineral Processing; 2020, 56, 1; 64-75
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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