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Tytuł:
Bagging and boosting techniques in prediction of particulate matters
Autorzy:
Triana, D.
Osowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/202449.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ensemble of predictors
bagging
boosting
PM pollution
Opis:
The paper presents new ensemble solutions, which can forecast the average level of particulate matters PM10 and PM2.5 with increased accuracy. The proposed network is composed of weak predictors integrated into a final expert system. The members of the ensemble are built based on deep multilayer perceptron and decision tree and use bagging and boosting principle in elaborating common decisions. The numerical experiments have been carried out for prediction of daily average pollution of PM10 and PM2.5 for the next day. The results of experiments have shown, that bagging and boosting ensembles employing these weak predictors improve greatly the quality of results. The mean absolute errors have been reduced by more than 30% in the case of PM10 and 20% in the case of PM2.5 in comparison to individually acting predictors.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 5; 1207-1215
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational fluid dynamics (CFD) aided design of a multi-rotor flying robot for locating sources of particulate matter pollution
Autorzy:
Suchanek, Grzegorz
Filipek, Roman
Powiązania:
https://bibliotekanauki.pl/articles/38435217.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
computational fluid dynamics
PM pollution
propeller aerodynamics
multi-rotor robot design
Opis:
The use of flying robots for various environmental protection issues is a very important and current research topic. Designing a dedicated multi-rotor flying robot is necessary for the efficient and automated localization of sources of air pollution, especially solid particles. In particular, one of the most important requirements that must be met by such a robot is its appropriate impact on the measurement process, i.e., increasing the sensitivity of sensors or reducing the interference. This is particularly difficult because its rotating rotors introduce significant disturbances to the surrounding fluid. In these studies, the design process is supported by the creation of a mathematical flow model and a series of analyzes to optimize the PM measurement system. The model is built using the finite-volume method in ANSYS Fluent software and steady-state RANS averaging. First, a flow field model with one propeller was modeled and its parameters identified by comparison with the results from the dedicated original dynamometer stand -- characteristics of the propeller performance. On the basis of the simulations and measurement of one rotor, subsequent systems of the highest practical importance are built. The effect of that design process was the preparation and testing of a functional robot prototype. The field parameter distributions resulting from the analyzes, in particular the turbulence intensity, allow one to propose a criterion on the basis of which both the best rotor configuration and localization of sensors are selected.
Źródło:
Applied Computer Science; 2022, 18, 3; 86-104
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zjawisko smogu na tle jakości powietrza we Wrocławiu w latach 2012–2016
The smog phenomenon and the air quality in Wroclaw in 2012–2016
Autorzy:
Kamińska, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/401005.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
smog
jakość powietrza
pył zawieszony PM10
smog phenomenon
air quality
suspended particulate pollution PM10
Opis:
Jakość powietrza atmosferycznego w ostatnich latach uległa ogólnej poprawie, jednak wciąż zdarzają się sytuacje, w których warunki emisji zanieczyszczeń do atmosfery w połączeniu ze specyficznymi warunkami meteorologicznymi sprawiają, że krótkoterminowe wskaźniki jakości powietrza przekraczają dopuszczalne normy. W miesiącach styczeń-marzec 2017 r. bardzo nagłośnione przez media było zjawisko smogu szczególnie w dużych aglomeracjach miejskich. W pracy dokonano analizy statystycznej stężenia pyłu zawieszonego PM10 – frakcje o średnicy cząstek mniejszej niż 10 μm (utożsamianego ze smogiem) w latach 2012–2017 we Wrocławiu. Celem pracy było porównanie rzeczywistych stężeń PM10 w okresie X–IV 2016/2017 z poprzednimi i weryfikacja informacji o wyjątkowo złym stanie powietrza w ostatnim czasie. Wskazano statystyczne podobieństwa i różnice w zmienności wartości tego wskaźnika w okresie X–IV 2016/2017 na tle poprzednich pięciu lat we Wrocławiu. Wykazano brak istotnych różnic w jakości powietrza w ostatnim okresie w porównaniu do poprzednich.
The quality of atmospheric air has improved in recent years, but there are still situations in which the atmospheric emissions combined with specific meteorological conditions make short-term air quality indicators in excess of the acceptable standards. In the months of January-March 2017, the smog phenomenon, present especially in large urban agglomerations received significant media coverage. The statistical analysis of the concentration of suspended particulate pollution PM10 – fractions with a particle diameter less than 10 μm (identified with smog) in Wrocław in the years 2012–2017 was performed. Similarities and differences in the volatility of this indicator were noted in the period X–IV 2016/2017 when compared to the previous five years in Wroclaw. There were no statistically significant differences in air quality in the recent period compared to the previous ones.
Źródło:
Inżynieria Ekologiczna; 2017, 18, 5; 66-76
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poznań Air Pollution Analysis for 2015–2017
Autorzy:
Smurzyńska, A.
Czekała, W.
Hektus, P.
Marks, S.
Mazurkiewicz, J.
Brzoski, M.
Chełkowski, D.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/125027.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Poznań
air pollution
PM10
PM2.5
Opis:
Air pollution is the result of natural processes and intense urban development. The undesired emission of volatile substances causes environmental threats such as acid rains, aggravated greenhouse effect or the ozone depletion. Moreover, the pollution released into the air is harmful to the human respiratory system, eyes and skin. This paper presents the body of analyses conducted in Poznań between 2015–2017 on the changes in the local emission concentration of PM10 and PM2.5. The data concerning the emission of suspended particulates were provided by the meteorological station on Polanka St. in Poznań. The research included a correlation analysis. The results point to a steady decrease in the amount of produced particulates. It was also noted that the emissions of PM10 and PM2.5 change seasonally, with the highest levels in the autumn and winter. Furthermore, the amount of emitted suspended particulates is correlated with the temperature; hence, it is supposed that the main source of air pollution in Poznań involves low-efficiency heaters and boilers.
Źródło:
Journal of Ecological Engineering; 2018, 19, 6; 162-169
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical characterization of PM10 in two small towns located in South Poland
Autorzy:
Turek-Fijak, Anna
Brania, Joanna
Styszko, Katarzyna
Zięba, Damian
Stęgowski, Zdzisław
Samek, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/1841646.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
air pollution
EDXFR fluorescence
PM10
Opis:
The purpose of this study is to analyse the elements and PM10 concentrations in air samples gathered in the winter of 2017/2018 in two small towns, namely Skala and Wadowice. The chemical elements were identified for each sample using the energy dispersive X-ray method. The spectrometer was equipped, among others, with an Mo-X-ray tube which was the source of the photons and the Si(Li) detector. The following chemical elements: Cl, K, Fe, Ca, Zn, Pb, Br, Ti, Cu, Mn, V, Co, Rb, Ni, Sr, and Cr were identifi ed in the samples. In addition, As and Se were identifi ed in Wadowice. First, the results were compared with each other and then with the results for the nearest city. It was observed that the PM10 concentrations were significantly higher than the UE limit value for PM10, which equals 50 gm−3 per 24 h. Moreover, the high concentrations of, among others, K, Pb, Cl or Zn, are likely to be linked with fossil fuels combustion and biomass burning. The levels of element concentrations in Wadowice and Skala resemble the levels observed several years earlier in Krakow.
Źródło:
Nukleonika; 2021, 66, 1; 29-34
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warunki termiczne a stężenie pyłu zawieszonego w powietrzu atmosferycznym zimą w wybranych miastach Polski
Thermal conditions and concentration of particulate matter in atmospheric air in winter in selected Polish cities
Autorzy:
Rawicki, K.
Powiązania:
https://bibliotekanauki.pl/articles/134837.pdf
Data publikacji:
2016
Wydawca:
ADVSEO
Tematy:
PM10
air temperature
air pollution
Opis:
The aim of the study was to assess the impact of thermal conditions on emission of PM10 in the atmosphere during the winter period in selected Polish cities. The basis of the work were average daily PM10 and air temperature measurement results, which were made in six cities during three of calendar winters (December-February) in 2011–2014. It has been shown that every decrease in temperature during the winter affects the increase in the concentration of PM10 in ambient air in most of the analyzed cities. The greatest role of air temperature in shaping emission of the fraction of particulate matter variability was found in a relatively cool winter 2011/2012, when the number of days with oversize levels of contamination ranged from 7 in Suwałki to even 46 in Nowy Sącz. The smallest impact of this weather element was found during a warm winter 2013/2014.
Źródło:
Technical Issues; 2016, 1; 59-65
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air pollution: how many cigarettes does each Pole ‘smoke’ every year and how does it influence health, with special respect to lung cancer?
Autorzy:
Chudzik, R.
Rybojad, P.
Jarosz-Chudzik, K.
Sawicki, M.
Rybojad, B.
Panasiuk, L.
Powiązania:
https://bibliotekanauki.pl/articles/2085106.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
lung cancer
PM2.5
air pollution
nitrogen dioxide
PM10
Opis:
Introduction. Air pollution is one of the most important issues of our times. Air quality assessment is based on the measurement of the concentration of substances formed during the combustion process and micro-particles suspended in the air in the form of an aerosol. Microscopic atmospheric particulate matters (PM) 2.5 and 10 are mixtures of organic and inorganic pollutants smaller than 2.5 and 10 μm, respectively. They are the main cause of negative phenomena in the earth’s atmosphere of Earth and human health, especially on the respiratory and cardiovascular systems. Particulates have the ability to cause permanent mutations of tissue, leading to neoplasms and even premature deaths. Nitrogen dioxide (NO2) is one of the main pollutants which arises mainly during the burning of fossil fuels. Based on numerous scientific researches, it has been proved that long-term exposure to NO2 could increase morbidity of cancer due to inflammatory processes increasing abnormal mutations. Materials and method. Data available in the Polish National Cancer Registry, Chief Inspectorate for Environmental Protection and Map of Health Needs in the Field of Oncology for Poland, WHO Air Quality Guidelines 2005 were analyzed. Air pollution was also evaluated: PM2.5, PM10, NO2, and compared with lung cancer morbidity. Results and conclusions. Based on the available data and literature, it can be concluded that in 2009–2017, on average, each Pole smoked ten cigarettes a day +/- 2. Therefore, it can be estimated that after 60 years everyone had 30 package-years of smoking, leading to a high risk of lung cancer and other smoking related diseases. Additionally air quality in Poland is not satisfactory, exceeding the standards presented in the WHO Guidelines 2005. It can be assumed that this may translate into an additional, independent continuous increase in morbidity and mortality dependent on smoking.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 566-571
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An assessment of PM1 levels based on indicative PM1 measurements and relationships with PM10 and PM2.5 concentrations, for the analysis of hospital admissions and mortality in the Moravian region
Autorzy:
Šlachtová, Hana
Tomášek, Ivan
Polaufová, Pavla
Hellebrandová, Lucie
Šplíchalová, Anna
Tomášková, Hana
Powiązania:
https://bibliotekanauki.pl/articles/2081904.pdf
Data publikacji:
2021-06-30
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
PM 1 concentrations
spatiotemporal PM variations
heating season differences
air pollution
PM 2.5 concentrations
PM 10 concentrations
Opis:
Particulate matter (PM) air pollution is a serious concern in the city of Ostrava. Thus, in 2018, a project entitled “Validation of the relationships between PM10, PM2.5 and PM1 concentrations, and morbidity and mortality, in the heavily polluted region in the Czech Republic,” was launched. The relationship between hospital admissions and mortality in the said region is based primarily on short-term PM10 and PM2.5 concentrations and indicative PM1 measurement. The analysis of spatiotemporal variations and the relationship between PM10, PM2.5 and PM1 data from 3 measurement sites within the city of Ostrava is presented.Material and MethodsThe analysis was based on the daily average PM concentrations for 5 and 6 months at 2 sites, and on the annual average values (2018–2019) at the baseline station. The correlations of and variability between PM fractions, seasonal differences and explanation of the differences found were the objectives of a detailed analysis. Especially, the potential PM1 variability and its causes were analyzed with respect to the location of the site.ResultsThe study findings confirmed good correlations between the PM fractions. Compared to PM10, PM2.5 concentrations were more predictive for PM1 concentrations. The annual means of PM10, PM2.5 and PM1 reached 37.5, 29.9 and 27.1 μg/m3 in 2018, respectively, and 25.8, 19.9 and 17.9 μg/m3 in 2019, respectively. The concentration levels in the non-heating season were significantly lower than in the heating season in the 2 years under consideration. The levels of PM10, PM2.5 and PM1 were significantly correlated (the correlation coefficient, r > 0.96). The levels of PM2.5 represented about 0.82–0.86 of PM10, and the levels of PM1 about 0.92–0.93 of PM2.5. These ratios were found to differ in the heating and non-heating seasons, with the PM2.5–PM10 ratio ranging 0.61–0.63 in the non-heating seasons.ConclusionsThe correlations found will be used for indicative PM1 measurements in other areas of the region. Seasonal variability should be taken into account as well. Med Pr. 2021;72(3):249–58
Źródło:
Medycyna Pracy; 2021, 72, 3; 249-258
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Emission to Air in Central Europe
Autorzy:
Pokrývková, Jozefína
Jurík, Ľuboš
Powiązania:
https://bibliotekanauki.pl/articles/123163.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
air quality
emission NOx
PM10
PM2,5
air imission
pollution modelling
Opis:
The present state of air quality is determined according to emission and imission situation of basic pollutants. According to the obtained information about the state of air quality, the development of imission and emission presently exhibits a decreasing tendency caused especially by industrial production innovations in European countries, with slight rises in renewable energy sources for electricity production, but especially the effort to improve the condition relates to the use of mandatory quotas and pollution charges in the European Union. The aim of the this article is to review the emission development in the year 1998 up to 2013 for Central European countries – Slovakia, Czech Republic and Poland and their comparison to the European average value of the released emission. The NOx and particulate matter PM10, PM2,5 were evaluated as pollutants, which over the last few years have contaminated the air and in particular the main environment.
Źródło:
Journal of Ecological Engineering; 2019, 20, 2; 51-57
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Outdoor particulate matter (PM) and associated cardiovascular diseases in the Middle East
Autorzy:
Nasser, Zeina
Salameh, Pascale
Nasser, Wissam
Abou Abbas, Linda
Elias, Elias
Leveque, Alain
Powiązania:
https://bibliotekanauki.pl/articles/2177237.pdf
Data publikacji:
2015-06-25
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
air pollution
particulate matter
PM2.5
PM10
cardiovascular diseases
Middle East
Opis:
Air pollution is a widespread environmental concern. Considerable epidemiological evidence indicates air pollution, particularly particulate matter (PM), as a major risk factor for cardiovascular diseases (CVD) in the developed countries. The main objective of our review is to assess the levels and sources of PM across the Middle East area and to search evidence for the relationship between PM exposure and CVD. An extensive review of the published literature pertaining to the subject (2000–2013) was conducted using PubMed, Medline and Google Scholar databases. We reveal that low utilization of public transport, ageing vehicle fleet and the increasing number of personal cars in the developing countries all contribute to the traffic congestion and aggravate the pollution problem. The annual average values of PM pollutants in the Middle East region are much higher than the World Health Organization 2006 guidelines (PM2.5 = 10 μg/m³, PM10 = 20 μg/m³). We uncover evidence on the association between PM and CVD in 4 Middle East countries: Iran, Kingdom of Saudi Arabia, Qatar and the United Arab Emirates. The findings are in light of the international figures. Ambient PM pollution is considered a potential risk factor for platelet activation and atherosclerosis and has been found to be linked with an increased risk for mortality and hospital admissions due to CVD. This review highlights the importance of developing a strategy to improve air quality and reduce outdoor air pollution in the developing countries, particularly in the Middle East. Future studies should weigh the potential impact of PM on the overall burden of cardiac diseases.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 4; 641-661
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of thermal inversion on the variability of PM10 concentration in winter seasons in Tricity
Autorzy:
Czarnecka, M.
Nidzgorska-Lencewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/207599.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
inversion
PM10
environment pollution
zanieczyszenie środowiska
inwersja
Opis:
The paper concerns the effect of thermal inversions on PM10 concentrations in winter seasons between 2004–2005 and 2012–2013 in Tricity. Temperature inversions were analyzed using aerological measurements timed at 00 UTC and 12 UTC obtained from the aerological station in Łeba. The PM10 concentrations were obtained from five Agency of Regional Air Quality stations in the Gdańsk metropolitan area (ARMAAG). The effect of inversion conditions on the variability of daily PM10 concentrations was assessed using single and multiple linear regressions. The unfavorable conditions of PM10 dispersion in the lower troposphere were mostly determined by elevated inversions, which occurred with comparable frequency, nearly 90%, during the day as well as at night. Surface inversions were recorded at a frequency of 30% at night and only 10% during day-time. The strongest adverse effect on PM10 concentrations and their variability during the period of calendar winter was found to be related to the thickness of surface inversions at night. A significant yet substantially less adverse effect during both day and night, however, was found to be related to the thickness of the lowest layer of upper inversion. The high location of the base of upper inversion, primarily during the day-time, contributed to a decrease in PM10 concentration.
Źródło:
Environment Protection Engineering; 2017, 43, 2; 157-172
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WARUNKI SYNOPTYCZNE PODCZAS WYSTĘPOWANIA WYSOKICH KONCENTRACJI PM10 W POZNANIU W LATACH 2010–2017
Autorzy:
Kendzierski, Sebastian
Forycka–Ławniczak, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/943760.pdf
Data publikacji:
2018
Wydawca:
Poznańskie Towarzystwo Przyjaciół Nauk
Tematy:
air pollution
particulate matter
PM10
synoptic situation
Opis:
The article presents examples of synoptic situations when the permissible concentration of PM10 was severely exceeded in 2010–2017 in Poznań. In many Polish cities, there are deviations from the norms for a number of days during the year. The scale of concentration of PM10 in the air is largely affected by the prevailing meteorological conditions such as low temperature and low wind speed. First, periods of the highest daily concentrations of pollutants were selected. Subsequently, synoptic maps for selected days were analysed. The most common cause of the pollution was a large boom which brought Arctic air to Poland. In this case, the highest concentration was accompanied by very low air temperatures and the resulting more intensive heating of buildings.
Źródło:
Badania Fizjograficzne Seria A - Geografia Fizyczna; 2018, 9(69); 65-71
2081-6014
Pojawia się w:
Badania Fizjograficzne Seria A - Geografia Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of air pollution on the respiratory system in preschool children with contribution of urban heat islands and geographic data – the aim of the study and methodological assumptions
Autorzy:
Bobrowska-Korzeniowska, Monika
Jerzyńska, Joanna
Polańska, Kinga
Kaleta, Dorota
Stelmach, Iwona
Kunert, Agata
Stelmach, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/2086575.pdf
Data publikacji:
2021-08-05
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
children
air pollution
allergy
PM
VOC
respiratory system
Opis:
It has been proven that outdoor and indoor air pollutants can cause adverse health effects and are able to promote the onset of atopic diseases. The current manuscript is focused on methodological issues. The aim of the study is to determine the effect of air pollution, urban environment, and urban heat islands (UHIs) on the occurrence of respiratory diseases including allergic rhinitis, asthma and wheezing in preschool children. The study group consists of 276 five-year-old children attending randomly selected kindergartens in the urban and rural areas of the Łódź Voivodeship. The questionnaire including data on the child’s state of health and socio-economic data will be filled by the caregivers. The children will undergo skin prick testing and the measurement of volatile organic compounds in exhaled breath. The key components of air pollution – particulate matter (PM) will be measured by personal meters. The PM sampling planned in the study will take 12 h for PM2.5 and for PM10 alike. Data on the level of outdoor air pollution will be collected based on the results obtained from air monitoring stations. The impact of air pollution, UHIs and the environment on the respiratory system and the presence of allergies in children, including chronic respiratory diseases, will be assessed. The project results will provide a scientific basis for the development of preventive programs in the population of children in the Łódź Voivodeship, adapted to the real health needs of society.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2021, 34, 4; 453-460
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air quality assessment in the municipality of Wadowice
Autorzy:
Petryk, A.
Powiązania:
https://bibliotekanauki.pl/articles/101257.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
low emission
boilers
pollution
PM10 particulate matter
Opis:
The article presents an analysis of pro-ecological activities in the municipality of Wadowice in the field of air quality protection against the effects of low emission. Research conducted by the Provincial Inspectorate for Environmental Protection in Krakow indicated that in the town of Wadowice, the capital of the municipality, in the period from October till March, the permissible level of particulate matter (PM10) was exceeded on average approximately 16 times within one month. The municipality of Wadowice is one of the most polluted municipalities of the Małopolska voivodeship. The elaborated municipal Low-Emission Economy Plan, updated in 2017, is coherent with the climate and energy package and implements the guidelines of the new European Union 2020 strategy for economic and social development. Until 2015, the municipality had implemented the KAWKA program, which led to liquidation of 11 coal-fired boiler rooms and installation of 11 new boiler rooms. The continuation of the system in 2016 enabled the closure of further 31 coal-fired boiler rooms and the assembly of new boiler rooms and 10 solar panel installations in order to reduce emissions in the local fuel-fired heat source.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2018, IV/1; 909-921
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of PM2.5 hourly concentrations in Beijing based on machine learning algorithm and ground-based LiDAR
Autorzy:
Fang, Zhiyuan
Yang, Hao
Li, Cheng
Cheng, Liangliang
Zhao, Ming
Xie, Chenbo
Powiązania:
https://bibliotekanauki.pl/articles/2073773.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PM2.5
LiDAR
machine learning
air pollution monitoring
Opis:
The prediction of PM2.5 is important for environmental forecasting and air pollution control. In this study, four machine learning methods, ground-based LiDAR data and meteorological data were used to predict the ground-level PM2.5 concentrations in Beijing. Among the four methods, the random forest (RF) method was the most effective in predicting ground-level PM2.5 concentrations. Compared with BP neural network, support vector machine (SVM), and various linear fitting methods, the accuracy of the RF method was superior by 10%. The method can describe the spatial and temporal variation in PM2.5 concentrations under different meteorological conditions, with low root mean square error (RMSE) and mean square deviation (MD), and the consistency index (IA) reached 99.69%. Under different weather conditions, the hourly variation in PM2.5 concentrations has a good descriptive ability. In this paper, we analyzed the weights of input variables in the RF method, constructed a pollution case to correspond to the relationship between input variables and PM2.5, and analyzed the sources of pollutants via HYSPLIT backward trajectory. This method can study the interaction between PM2.5 and air pollution variables, and provide new ideas for preventing and forecasting air pollution.
Źródło:
Archives of Environmental Protection; 2021, 47, 3; 98--107
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 42

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