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Wyświetlanie 1-15 z 22
Tytuł:
Scale effects on sediment yield from badland areas in Mediterranean environments
Autorzy:
Martínez-Murillo, J. F.
Nadal-Romero, E.
Vanmaercke, M.
Poesen, J.
Powiązania:
https://bibliotekanauki.pl/articles/294681.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
badlands
sediment yield
drainage area
spatial scale
Opis:
This study investigates area-specific Sediment Yield (SY) in Mediterranean badland areas at different spatial scales using a SY-database compiled from scientific literature. Relationships between the plot and catchment characteristics and the corresponding SY-data are analyzed. Results indicate that in Mediterranean environments SY is larger than in other environments,especially in badlands where a high variability of SY is observed depending on the spatial scale. In intensively gullied badlands,a complex plot or drainage area (A) -SY relationship is observed: for A ranging between 10-5 and 10 ha,SY is very high (mean SY equals 475 t ha-1 yr-1),whereas for A greater than 10 ha,SY decreases with increasing A (mean SY less than 100 t ha-1 yr-1).
Źródło:
Landform Analysis; 2011, 17; 105-109
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Land Quality, Development and Space: Does Scale Matter?
Autorzy:
Salvati, Luca
Powiązania:
https://bibliotekanauki.pl/articles/623829.pdf
Data publikacji:
2014-01-22
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
land degradation
income distribution
spatial scale
Italy
Opis:
This study analyzes empirically the relationship between land quality decline and the spatial distribution of per capita income observed in Italy at different spatial scales and geographical divisions. The aim of this contribution is to verify if a decline in land quality has higher probability to occur in economically disadvantaged areas and if scale may influence this relationship. Per capita income was considered a proxy indicator for the level of socio-economic development and life quality in the investigated area. Changes over time (1990–2000) of a composite index of land quality and per capita income in Italy were regressed at four spatial scales: (i) 20 NUTS-2 regions, (ii) 103 NUTS-3 prefectures, (iii) 784 local districts designed as Local Labour Market Areas (LLMAs), and (iv) 8,101 LAU-1 municipalities. Different specifications were tested, including first, second and third order polynomial equations. Linear models allowed the best fit for data examined at all spatial scales. However, elasticity of the dependent variable to per capita income varied considerably according to scale suggesting that developmental policies may have a limited impact on land quality in vulnerable southern Italian areas compared to northern and central Italy. This study suggests that geographically disaggregated data simulating different spatial levels of governance may offer further insights compared to cross-country datasets indicating targets for multi-scale policies possibly preventing a poverty-desertification spiral.
Źródło:
European Spatial Research and Policy; 2013, 20, 2
1231-1952
1896-1525
Pojawia się w:
European Spatial Research and Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial Scale Analysis of Soil Water Content in Agricultural Soils of the Nitra River Catchment (Slovakia)
Autorzy:
Tárník, Andrej
Igaz, Dušan
Powiązania:
https://bibliotekanauki.pl/articles/123181.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
soil water content
spatial scale
GIS
HYDRUS
Opis:
Determining the soil water content (SWC) in a soil profile is very important task for agriculture and also for a wider ecological context. The spatial and temporal variability of SWC is a elementary issue for agricultural practice, irrigation management, or landscape management globally. Various methods are used for obtaining the SWC data. Every method has some advantages and also disadvantages. Many of them are focused only on one dimension but modern precise agriculture needs the information about SWC in spatial scale. This study is focused on the spatial scale analysis of SWC in the Nitra river catchment for years 2013 and 2014. The HYDRUS 1D hydrological model and GIS tools were used for the creation maps of SWC. Combination of the measured and simulated data was used for the creation of the unique spatial maps of soil moisture in 0–30 and 30–60 cm soil horizons. Validation of our method shows trustworthy results. Soil water storage and fulfillment of maximum soil water storage were analysed with using the created maps.
Źródło:
Journal of Ecological Engineering; 2020, 21, 1; 112-119
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shear-generating motions at various length scales and frequencies in the Baltic Sea - an attempt to narrow down the problem of horizontal dispersion
Autorzy:
Nerheim, S.
Powiązania:
https://bibliotekanauki.pl/articles/48103.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
spatial scale
seasonal thermocline
temperature
temporal scale
salinity
Baltic Sea
horizontal dispersion
Opis:
In the Baltic Proper, the mean circulation is too weak to explain the fast southward spreading of the so-called juvenile freshwater trapped by the seasonal thermocline in the summer season. Improved knowledge of the spatial and temporal scales of the velocity field is needed to better model dispersion. Spatial and temporal scales are investigated using some large historic data sets. Inertial oscillations are almost always present in the Baltic Proper, irrespective of wind conditions and mixed layer thicknesses. Analyses of the coherence in one data set reveal that the inertial oscillations have a horizontal coherence scale of 10–20 km under the conditions experienced during those measurements. Transient eddies and basin-scale modes with weaker periodicity are also indicated in our data sets. A tentative wavenumber spectrum is constructed for the Baltic Proper.
Źródło:
Oceanologia; 2004, 46, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of multi-scale data management for CityGML-based 3D buildings
Autorzy:
Karim, Hairi
Rahman, Alias Abdul
Azri, Suhaibah
Halim, Zurairah
Powiązania:
https://bibliotekanauki.pl/articles/2055778.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
CityGML
Level of Details (LoD)
multi-scale
scale unique ID
cross-scale query
spatial scale data management
Opis:
The CityGML model is now the norm for smart city or digital twin city development for better planning, management, risk-related modelling and other applications. CityGML comes with five levels of detail (LoD), mainly constructed from point cloud measurements and images of several systems, resulting in a variety of accuracies and detailed models. The LoDs, also known as pre-defined multi-scale models, require large storage-memory-graphic consumption compared to single scale models. Furthermore, these multi-scales have redundancy in geometries, attributes, are costly in terms of time and workload in updating tasks, and are difficult to view in a single viewer. It is essential for data owners to engage with a suitable multi-scale spatial management solution in minimizes the drawbacks of the current implementation. The proper construction, control and management of multi-scale models are needed to encourage and expedite data sharing among data owners, agencies, stakeholders and public users for efficient information retrieval and analyses. This paper discusses the construction of the CityGML model with different LoDs using several datasets. A scale unique ID is introduced to connect all respective LoDs for cross-LoD information queries within a single viewer. The paper also highlights the benefits of intermediate outputs and limitations of the proposed solution, as well as suggestions for the future.
Źródło:
Geomatics and Environmental Engineering; 2022, 16, 1; 71--94
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie czasowej i przestrzennej makroskali turbulencji w korycie o złożonym przekroju poprzecznym
Investigation of the time and spatial macro-scale of turbulence in a compound channel
Autorzy:
Koziol, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/40551.pdf
Data publikacji:
2008
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
inzynieria wodna
koryta otwarte
koryta zlozone
przeplyw wody
skala czasowa
skala przestrzenna
turbulencja
water engineering
open riverbed
compound riverbed
water flow
time scale
spatial scale
turbulence
Źródło:
Acta Scientiarum Polonorum. Architectura; 2008, 07, 4
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do czego służą badania na stałych powierzchniach w Białowieskim Parku Narodowym?
What is the use of studies carried out on the permanent plots in the Bialowieza National Park?
Autorzy:
Bobiec, A.
Powiązania:
https://bibliotekanauki.pl/articles/1294369.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
ekologia lasu
Bialowieski Park Narodowy
lasy
stale powierzchnie obserwacyjne
badania naukowe
ekosystemy lesne
dynamika ekosystemow
sukcesja naturalna
szkodniki roslin
kornik drukarz
gradacja
ecological disturbances
ecological history
plots’ representativeness
spatial scale
spruce bark beetle outbreak
stand
dynamics
Opis:
The purpose of the strictly protected area of the Białowieża National Park (BNP) established in early 1900s, was to protect a compact block of the Białowieża forest from any direct human influence and activity. Its founders considered it a “laboratory of nature.” In 1936, five rectangular plots with a total area of ca. 15.5 ha (ca. 0.3% of the BNP) were set up for regular monitoring of stand development with regards to the initial state and variability of soil conditions. During the first 76 years of the project, a steady increase in the proportion of hornbeam and lime tree at the expense of shade-intolerant species was observed. This trend has been interpreted by the researchers involved in the monitoring of the permanent BNP plots to constitute a biodiversity-threatening development caused by preservation efforts. Such an interpretation has been widely incorporated in the public debate by political authorities and the forestry sector. In this critical article I challenge the major arguments presented by the key expert in silviculture, prof. B. Brzeziecki. My criticism is directed at the methodological approach as well as at the data interpretation.
Źródło:
Leśne Prace Badawcze; 2016, 77, 4
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical note: Comparison between two methods for estimating the vertical scale of fluctuation for modeling random geotechnical problems
Autorzy:
Pieczyńska-Kozłowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/178384.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
scale of fluctuation
spatial variability
Opis:
The design process in geotechnical engineering requires the most accurate mapping of soil. The difficulty lies in the spatial variability of soil parameters, which has been a site of investigation of many researches for many years. This study analyses the soilmodeling problem by suggesting two effective methods of acquiring information for modeling that consists of variability from cone penetration test (CPT). The first method has been used in geotechnical engineering, but the second one has not been associated with geotechnics so far. Both methods are applied to a case study in which the parameters of changes are estimated. The knowledge of the variability of parameters allows in a long term more effective estimation, for example, bearing capacity probability of failure.
Źródło:
Studia Geotechnica et Mechanica; 2015, 37, 4; 95-103
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Large scale industrial enterprises in Turkish industry: their structures, characteristics and spatial distribution
Autorzy:
Temurçin, Kadir
Powiązania:
https://bibliotekanauki.pl/articles/438310.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
industry
industrial enterprises
large scale
spatial distribution
Turkey
Opis:
Industrialization is a process which is based on precise and quantitative measurements and contains different basic changes in the economic structure of a country or region. The structural characteristics and spatial distribution of the industrial enterprises established during the industrialization process which is one of the most important elements of the socio-economic transformation in Turkey within a historical process has been the object of this study. The aim of the study was to establish the positions and significance of one thousand (1000) large industrial companies in the industry of Turkey by using the framework of criteria based on sales from production which have been maintained by the Istanbul Chamber of Industry on a regular basis. The workplace and number of employees of the companies on a province basis, sector based division, realized exports and sales from product output, corporate entities, structures, spatial distribution and other characteristics were taken into consideration in the study. Although the thousand large scale companies in Turkey based on production output sales comprised only0.40% of the enterprises active in the industrial sector in 2012, they comprised 12% of the labor force,59.6% of product output sales and 65.2% of all exports. On a regional basis, 54% of these companies are located in the Marmara region, 13.2% are located in Central Anatolia and 12.4% are located in the Aegean region; on a province basis, 63.4% are located in Istanbul, Izmir, Bursa, Kocaeli and Ankara. A sector based division of the companies shows that 21.4% are involved in food, beverage and tobacco processing, 19.6% are involved in the industry of metal goods, machinery, automotive industry, electrical tools and equipment and 16.1% deal with textiles, ready-to-wear, leather and the manufacturing of shoes. In terms of labor force numbers, the figures vary as 18.9%, 27.4% and 17.9% respectively.
Źródło:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego; 2015, 29, 1; 89-112
2080-1653
Pojawia się w:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Modifiable Areal Unit Problem – Analysis of Correlation and Regression
Autorzy:
Pietrzak, Michał Bernard
Powiązania:
https://bibliotekanauki.pl/articles/517297.pdf
Data publikacji:
2014
Wydawca:
Instytut Badań Gospodarczych
Tematy:
spatial econometrics
modifiable areal unit problem
scale problem
Opis:
The paper focuses on the issue of the modifiable areal unit problem, which means a possibility of obtaining various results for spatial economic analyses depending on the assumed composition of territorial units. The major research objective of the work is to examine the scale problem that constitutes one of the aspects of the modifiable areal unit problem. Analysis of the scale problem will be conducted for two research problems, namely, for the problem of the causal relationships between the level of investment outlays in enterprises per capita and the number of entities of the national economy per capita, and the issue of the dependence between the registered unemployment rate and the level of investment outlays per capita. The calculations based on the empirical values of those variables have showed that moving to a higher level of aggregation resulted in a change in the estimates of the parameters. The results obtained were the justification for undertaking the realisation of the objective. The scale problem was considered by means of a simulation analysis with a special emphasis laid on differentiating the variables expressed in absolute quantities and ones expressed in relative quantities. The study conducted allowed the identification of changes in basic properties as well as in correlation of the researched variables expressed in absolute and relative quantities. Based on the findings, it was stated that a correlation analysis and a regression analysis may lead to different conclusions depending on the assumed level of aggregation. The realisation of the research objective set in the paper also showed the need to consider the adequate character of variables in both spatial economic analyses and during the examination of the scale problem.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 4; 113-131
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Redefining the Modifiable Areal Unit Problem Within Spatial Econometrics, the Case of the Aggregation Problem
Autorzy:
Pietrzak, Michał Bernard
Powiązania:
https://bibliotekanauki.pl/articles/517415.pdf
Data publikacji:
2014
Wydawca:
Instytut Badań Gospodarczych
Tematy:
spatial econometrics
modifiable areal unit problem
scale problem
aggregation problem
Opis:
The paper focuses on the issue of the aggregation problem, which is frequently discussed within spatial econometrics. The aggregation problem is one of the two aspects of the modifiable areal unit problem (MAUP). The aggregation problem is connected with the volatility of the obtained results occurred when various compositions of territorial units for the same aggregation scale were applied. The objective of the present paper is to consider the redefinition of aggregation problem and showing positive solution of the aggregation problem based on the empirical example of determining agricultural macroregions. In the article the aggregation problem was defined as a problem of establishing a particular composition of territorial units at a selected aggregation scale in a such a way that is remains in the quasi composition of regions within the undertaken research problem. The paper also presented the procedure for determining agricultural macroregions where the analysis of the spatial volatility of the agrarian structure and the current knowledge on the agriculture in Poland were applied. In addition, the paper considered the final areal interpretation problem con-nected with the incorrect determination of the area in relation to which final conclusions are drawn. The problem was presented basing on the example of the establishment of the average concentration of the area of agricultural land in Poland with the use of the Gini index calculated for districts. The paper emphasised that ignoring the final areal interpretation problem in spatial analyses may lead to an apparent identification of the modifiable areal unit problem.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 3; 131-151
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Redefining The Modifiable Areal Unit Problem Within Spatial Econometrics, the Case of The Scale Problem
Autorzy:
Bernard Pietrzak, Michał
Powiązania:
https://bibliotekanauki.pl/articles/517391.pdf
Data publikacji:
2014
Wydawca:
Instytut Badań Gospodarczych
Tematy:
spatial econometrics
modifiable areal unit problem
scale problem
aggregation problem
Opis:
The paper focuses on the issue of the modifiable areal unit problem (MAUP), which is frequently discussed within spatial econometrics. This issue concerns the changeability of the characteristics of the analysed phenomena under the impact of the change in the composition of territorial units. The article indicates four conditions which need to be fulfilled if the correctness of spatial analyses is to be maintained. Also, the paper introduces the concept of the quasi composition of regions (QCR). It was defined as a set of particular compositions of territorial units for subsequent aggregation scales. Particular compositions of territorial units are selected in a way that allows a correct analysis within the undertaken research problem to be conducted. The chief asset of the paper is the proposal to redefine the concept of the modifiable areal unit problem. Both the scale problem and the aggregation problem were linked to the accepted quasi composition of regions. The redefinition of the concept is vital for the research conducted since analysing phenomena based on compositions of territorial units which are excluded from the quasi composition of regions leads to the formulation of incorrect conclusions. Within the undertaken research problem there exists only one particular composition of territorial units which allows the identification and description of the dependence for analysed phenomena. Within the considered modifiable areal unit problem two potential problems were defined and they can occur while making spatial analyses. The first is the final areal interpretation problem (FAIP) that occurs when the characteristics of phenomena or the dependence are designated for too large region. The other issue is the aggregation scale interpretation problem (ASIP). It occurs when a quasi composition of regions is enlarged by an aggregation scale where the correctness of the results of the undertaken research problem is not preserved. In both cases it is possible to reach a situation where the obtained characteristics will be deprived of the cognitive value.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 2; 111-132
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On determining the undrained bearing capacity coefficients of variation for foundations embedded on spatially variable soil
Autorzy:
Chwała, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/178626.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
spatial averaging
random field
random bearing capacity
fluctuation scale
failure mechanism
Opis:
This paper presents an efficient method and its usage for the three-dimensional random bearing capacity evaluation for square and rectangular footings. One of the objectives of the study is to deliver graphs that can be used to easily estimate the approximated values of coefficients of variations of undrained bearing capacity. The numerical calculations were based on the proposed method that connects three-dimensional failure mechanism, simulated annealing optimization scheme and spatial averaging. The random field is used for describing the spatial variability of undrained shear strength. The proposed approach is in accordance with a constant covariance matrix concept, that results in a highly efficient tool for estimating the probabilistic characteristics of bearing capacity. As a result, numerous three-dimensional simulations were performed to create the graphs. The considered covariance matrix is a result of Vanmarcke’s spatial averaging discretization of a random field in the dissipation regions to the single random variables. The matrix describes mutual correlation between each dissipation region (or between those random variables). However, in the presented approach, the matrix was obtained for the expected value of undrained shear strength and keep constant during Monte Carlo simulations. The graphs were established in dimensionless coordinates that vary in the observable in practice ranges of parameters (i.e., values of fluctuation scales, foundation sizes and shapes). Examples of usage were given in the study to illustrate the application possibility of the graphs. Moreover, the comparison with the approach that uses individually determined covariance matrix is shown.
Źródło:
Studia Geotechnica et Mechanica; 2020, 42, 2; 125-136
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical fields during construction and operation of wind farms by example of Polish maritime areas
Autorzy:
Otremba, Z.
Andrulewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/260016.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine environment
wind farms
physical field
large scale constructions
marine spatial planning
Opis:
The article discusses an important issue of technical pressure exerted on the marine environment during construction and operation of maritime wind farms (MFW) on waters of the Polish Exclusive Economic Zone. A motivation for analysing this issue is the need for attracting attention to the aspect of physical field modification as the factor which links large scale technical activity at sea with the existence and functioning of the marine ecosystem, including further consequences to its economic benefits. Based on current knowledge and authors’ analyses, the scale of modifications (disturbances) of physical fields expected to take place during MFW construction and operation was assessed.
Źródło:
Polish Maritime Research; 2014, 4; 113-122
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of dynamic processes of the system “Vehicle – Track” using the new method of vehicle wheel with metal scale
Badanie dynamicznych procesów zachodzących w układzie „pojazd-tor” z wykorzystaniem nowej metody dla kół z metalową łuską
Autorzy:
Bogdevičius, M.
Žygienė, R.
Powiązania:
https://bibliotekanauki.pl/articles/946078.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
rail-wheel interaction
spatial model of metal scale
contact area
impact force
friction force
vibration
oddziaływania koło–szyna
przestrzenny model łuski metalowej
obszar kontaktu
siła uderzenia
siła tarcia
wibracja
Opis:
Mathematical models of vehicle wheel with metal scales are introduced in this article. When analysing the interaction between vehicle wheel with a metal scale and rail in the system “Vehicle – Track”, the changes of the kinematic and dynamic parameters of the wheel and rail contact points in time are examined, depending on the height of the 2 mm metal scale, when the length of the metal scale is 100 mm and the speed of movement is V = 40 - 100 km/h. The results obtained after the research of the system “Vehicle – Track”, when the wheel has a metal scale, help to better understand and evaluate the impact of metal scale on wheel on dynamic loads of rail and vehicle and the regularities of their movement. The appearance of a metal scale on the wheel’s surface causes technical and maintenances problems for the rolling stock. Railway standards limit the speed of movement that depends on a certain size of metal scale.
W niniejszym artykule przedstawiono modele matematyczne koła pojazdu szynowego z powstałą w wyniku zużycia metalową łuską. Analizując oddziaływania pomiędzy kołem pojazdu z łuską a szyną w układzie "pojazd–tor", badano zmiany kinematycznych i dynamicznych parametrów punktów kontaktu koła z szyną zachodzące w czasie, w zależności od wysokości metalowej łuski (2mm), przy długości łuski 100 mm i zakresie prędkości ruchu pojazdu V = 40–100 km/h. Wyniki uzyskane w badaniu układu "pojazd–tor" dla kół na powierzchni których powstała metalowa łuska, umożliwiają lepsze zrozumienie oraz ocenę wpływu łuski na dynamiczne obciążenia szyny i pojazdu oraz prawidłowości ruchu pojazdu. Pojawienie się metalowej łuski na powierzchni koła powoduje problemy techniczne i obsługowe w utrzymaniu ruchu taboru kolejowego. Normy kolejowe ograniczają prędkość ruchu pojazdów szynowych, uzależniając ją od rozmiaru łuski.
Źródło:
Eksploatacja i Niezawodność; 2018, 20, 4; 638-649
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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