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Tytuł:
Wybór podwykonawców projektu z zastosowaniem metody analizy hierarchicznej
Selection of subcontractors for a project using the hierarchical analysis method
Autorzy:
Zieliński, B.
Powiązania:
https://bibliotekanauki.pl/articles/162696.pdf
Data publikacji:
2011
Wydawca:
Polski Związek Inżynierów i Techników Budownictwa
Tematy:
projekt budowlany
zarządzanie projektem
wybór podwykonawcy
analiza hierarchiczna
building project
project management
subcontractor selection
hierarchical analysis
Opis:
Jednym z podstawowych zadań, przed jakimi staje kierownik projektu, jest podejmowanie decyzji dotyczących sposobu realizacji i (ewentualnego) wyboru podwykonawców projektu. Zjawiska analizowane na poszczególnych etapach cyklu życia projektu są bardzo złożone, co wynika z rosnącej liczby analizowanych obiektów oraz złożoności występujących między nimi relacji. Niniejszy artykuł, wprowadzający do praktycznego stosowania metody analizy hierarchicznej, prezentuje możliwości jej zastosowania w procesie wyboru podwykonawców projektu.
One of the principal tasks of a project manager is to take decisions concerning how the project is to be executed, and to select subcontractors where required. The phenomena analysed at particular stages of the project lifecycle are very complex, due to the increasing number of analysed structures and the complexity of the relations between them. This paper, which serves as an introduction to the practical application of the hierarchical analysis method, presents possibilities for the application of that method in the process of selection of subcontractors for a project.
Źródło:
Przegląd Budowlany; 2011, R. 82, nr 7-8, 7-8; 64-68
0033-2038
Pojawia się w:
Przegląd Budowlany
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyznaczanie wag kryteriów w zintegrowanych ocenach budynków
Determining of weights criteria of integrated building evaluations
Autorzy:
Panek, A
Rucińska, J
Powiązania:
https://bibliotekanauki.pl/articles/362364.pdf
Data publikacji:
2011
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
analiza hierarchiczna
metody oceny wielokryterialnej
hierarchical analysis
multi-method evaluation
Opis:
W niniejszym artykule scharakteryzowano metody służące do rozwiązywania problemów wielokryterialnych. Opisano także wybrane metody oceny wpływu budynków na środowisko oraz wagi przyjęte w tych systemach. Z przedstawionego przykładu widać, że istnieje rozbieżność w przyporządkowywaniu wag emisji otrzymywanych na podstawie kosztów emisji i wg metody analizy hierarchicznej.
This paper presents the methods for solving multicriteria problems, methods of assessment for building environment efficiency and the weights for these systems. The example shows that there is a discrepancy in attributing emissions weights based on the cost issue and according to the method of analytical hierarchy process.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2011, T. 6, nr 4, 4; 53-58
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie rozmytej hierarchicznej analizy do oceny czynników strategicznych w gminie
Application of fuzzy hierarchical analysis to evaluation of strategic factors in community
Autorzy:
Luczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/864554.pdf
Data publikacji:
2013
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Opis:
Celem badań było przedstawienie możliwości zastosowania rozmytej hierarchicznej analizy (FHA) do oceny ważności czynników strategicznych (celów strategicznych i zadań) w gminie. Proponowane podejście zilustrowano przykładem dla gminy Puszczykowo w województwie wielkopolskim. W badaniach wykorzystano dane z badań ankietowych przeprowadzonych wśród radnych gminy Puszczykowo w 2012 r. Przeprowadzone badania empiryczne potwierdziły przydatność rozmytej hierarchicznej analizy do oceny ważności czynników strategicznych. Metoda ta pozwoliła na skwantyfikowanie ważności poszczególnych czynników strategicznych. Do najważniejszych celów w gminie Puszczykowo zaliczyć należy poprawę warunków życia ludności, a w następnej kolejności rozwój gospodarki. Wśród zadań najważniejsze były: utworzenie żłobka, szkolenia dla mieszkańców w ramach rozwoju przedsiębiorczości oraz dostosowanie obiektów do osób niepełnosprawnych. Zaproponowane podejście może być wykorzystane w procesie tworzenia strategii rozwojowych jednostek administracyjnych.
The aim of this study was to show the applicability offuzzy hierarchical analysis (FHA) for evaluation of strategic factors (strategic goals and objectives) in the community. The proposed approach is illustrated by an example for the Puszczykowo commune in the Wielkopolska province. The study used data from a survey of commune councilors of Puszczykowo in 2012 year. Conducted empirical studies have confirmed the usefulness of fuzzy hierarchical analysis to evaluation of importance of the strategicfactors. This method allowed us to quantify the importance of each strategic factors. In the Puszczykowo commune the most important goals were to improve the living conditions of the population and the economy. And among the most important activities were: the creation of nursery, training for the people in the business development, development of the areas not included in the development plans and adaptation of buildings to disabled persons. This method is useful at programming of development.
Źródło:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2013, 15, 2
1508-3535
2450-7296
Pojawia się w:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of concepts of the analytic hierarchy process in decision-making
Autorzy:
Krenicky, Tibor
Hrebenyk, Liudmyla
Chernobrovchenko, Vadym
Powiązania:
https://bibliotekanauki.pl/articles/27315536.pdf
Data publikacji:
2022
Wydawca:
STE GROUP
Tematy:
multicriteria decision-making
hierarchical analysis
analytic hierarchy process
health technology assessment
Opis:
The Analytical Hierarchy Process (AHP) is one of the multi-criteria methods with tools that are effective for decision-making in complementary or alternative medicine (CAM). This approach, in combination with other available methods, such as the Utrecht Method, allows medical professionals and patients themselves to take a balanced choice of special treatment and health control. This is particularly important for pregnant women who suffer from nausea and vomiting during pregnancy (NVP). The mechanisms of toxicosis occur, and the way of treatment have certain uncertainties. The decision-making process for therapeutic care must consider several factors, the determination of which is the result of collaboration between the patient and the healthcare provider. This paper presents the results of a decision-making study regarding the use of the ginger medicinal plant in helping a woman with NVP symptoms. The research was conducted using the original questionnaire according to the methodology proposed by the developers of the Utrecht Method. The chosen respondents were healthcare professionals with experience in treating NVP and pregnant women. The Analytical Hierarchy Process (AHP) capabilities in decisionmaking were shown in an example of analyzing the benefits, risks, and side effects of using ginger during pregnancy. The combination of two methodological approaches allowed to successfully connect the proven facts of using CAM therapy with the subjective assessment of all stakeholders. The study demonstrates that this approach successfully uses decision-making by structuring hierarchical decision elements and weighing the criteria involved in the decision-making issue. The article examines the practicality and effectiveness of using AHP when making decisions regarding the treatment and improvement of the condition of pregnant women with NVP, and summarizes the quantitative and qualitative indicators of the effectiveness of this method. The presented combination of two methodological approaches in decision-making allows for choosing an optimized medical strategy for supporting pregnant women through CAM therapy.
Źródło:
Management Systems in Production Engineering; 2022, 4 (30); 304--310
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hierarchical cluster analysis methods applied to image segmentation by watershed merging
Autorzy:
Smołka, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/764493.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2007, 6, 1
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-automatic watershed merging method
Autorzy:
Smołka, J.
Skublewska-Paszkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/106178.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
watershed
hierarchical cluster analysis
colour images
segmentation
Opis:
Watershed transformation frequently produces over-segmented images. The authors propose a solution to this problem. It utilizes hierarchical cluster analysis for grouping watersheds which are treated as objects characterized by a number of attributes. Initially the watershed merging method was meant only for gray-scale images, but later it was adapted for colour images. This paper presents further extension of the method that allows it to either automatically select the numberof classes or to provide a hint as to which numbers in a specified range should be considered first.Segmentation quality assessment functions for colour images are presented. The results obtained using an extended watershed merging method are discussed. The examples of segmentations selected by the method, along with the graphs of assessment functions, are shown.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2013, 13, 1; 89-97
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kampus AGH w Krakowie oraz tereny pobliskich parków w aspekcie oceny stopnia rewitalizacji
AGH-UST campus area in Kraków and neighbouring parks in the aspect of the assessment of their revitalisation
Autorzy:
Wagner, Aleksandra
Gulin, Vesna
Powiązania:
https://bibliotekanauki.pl/articles/447200.pdf
Data publikacji:
2014-06
Wydawca:
Instytut Rozwoju Miast
Tematy:
Kampus AGH
Park Jordana w Krakowie
Park Krakowski
analiza hierarchiczna
AGH-UST Campus
Jordan Park in Kraków
hierarchical analysis
Opis:
Kampus AGH leży w pobliżu centrum miasta Krakowa. W jego obrębie znajdują się liczne tereny sportowe, kawiarnie, restauracje oraz kluby. Sąsiaduje on z dwoma dużymi obszarami zieleni miejskiej: Parkiem Jordana i Parkiem Krakowskim, popularnymi terenami rekreacyjnymi. Te powstałe pod koniec XIX w. parki, niegdyś bardzo nowoczesne, w latach powojennych zaczęły podupadać. W latach 90. XX wieku podjęto ich rewitalizację, która trwa do dziś. Prowadzi się też skuteczną rewitalizację samego terenu Kampusu. Procesowi temu często przeszkadzają złe wzorce behawioralne użytkowników. W pracy badano stopień zaśmiecenia terenu. Wybrano trzy obszary o zróżnicowanym stopniu atrakcyjności na terenie kampusu AGH i w jego pobliżu: Park im. dra Henryka Jordana, Miasteczko Studenckie oraz budynki uczelniane wraz z Parkiem Krakowskim. Badania prowadzono w październiku 2013r. Stosując metodę Saaty‟ego do obliczenia względnych wag czynników i oceniając ilość śmieci porównano trzy strefy, mając na uwadze ich atrakcyjność. Najatrakcyjniejsza okazała się strefa budynków uczelnianych, natomiast teren parków spotkał się z mniejszym zainteresowaniem, choć różnice były niewielkie. Park Jordana był najmniej zaśmieconym obszarem. Sam proces rewitalizacji należy ocenić dobrze, natomiast problemem pozostaje utrzymanie terenu w dobrym stanie. Dlatego też istotnego znaczenia nabiera edukacja proekologiczna studentów.
The AGH-UST campus is located within walking distance of the city centre in Kraków and offers a wide range of sports facilities, cafés, restaurants, and student clubs. There are two large green areas near the campus: (1) Henryk Jordan Park (Park Jordana), (2) Park Krakowski, both popular recreational areas. These established at the end of the 19th century parks, once very modern, began to decline after World War II. Revitalisation of the parks has been ongoing since the 1990s. The campus area has also been undergoing revitalisation. This process is often hampered by bad behavioural patterns of local residents. Thus, an assessment of the amount of waste in areas of different attractiveness in the AGH campus area was carried out. Three zones were identified: (1) Henryk Jordan Park, (2) student dormitories, (3) university facilities. The research was carried out in October of 2013. The three zones were compared in terms of their attractiveness. Saaty‟s Method was applied to calculate relative weights. The amount of waste was also analysed. The most attractive part of the campus turned out to be the area with main university buildings, while the local parks seemed to be less attractive, although the differences were small. The smallest amount of waste was found in Jordan‟s Park. The very process of revitalisation should be assessed positively, but the problem is to keep the area in good shape. Thus, the environmental education of university students is important in this case.
Źródło:
Problemy Rozwoju Miast; 2014, 2; 117-126
1733-2435
Pojawia się w:
Problemy Rozwoju Miast
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of cropping intensity and irrigation intensity in North Twenty Four Parganas district, West Bengal, India
Autorzy:
Mondal, Tarun Kumar
Sarkar, Santana
Powiązania:
https://bibliotekanauki.pl/articles/1954987.pdf
Data publikacji:
2021-12-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Cropping intensity
hierarchical cluster analysis
irrigation intensity
ANOVA
residual mapping
Opis:
An attempt has been made in this paper to analyse the spatio-temporal variations of cropping intensity and irrigation intensity, and their relationship, in North Twenty Four Parganas district in West Bengal, India from 1996/97 to 2015/16. The relationship between cropping intensity and irrigation intensity has been assessed using partial correlation, residual mapping and hierarchical cluster analysis. One-way ANOVA has been conducted for testing the equality of cluster means. Temporal analysis from 1996/97 to 2015/16 has shown a low positive correlation between cropping intensity and irrigation intensity for the entire district. Analysis at Agricultural Block level has revealed that cropping intensity decreased in many cases even after an increase in irrigation intensity. In general, cropping intensity has increased with the increase in irrigation intensity in the Coastal Saline Region and the Ichhamati Basin, whereas cropping intensity has increased even after a decrease in irrigation intensity in the Gangetic Plains Region in the district.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2021, 25, 4; 246-258
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The technology of hierarchical agglomerative cluster analysis in library research
Autorzy:
Кunenets, N.
Powiązania:
https://bibliotekanauki.pl/articles/411442.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
cluster analysis
object-property table
proximity matrix
dendrogram
clusters
Opis:
This article describes the simple technology of the hierarchical agglomerative cluster analysis of 20 different libraries, presented by the samples of classification attributes of the same volumes. It is necessary to construct a proximity matrix for an effective process of cluster analysis, using the data from the table “library-classification features”. For separating a set of selected objects into clusters, so that each of them has objects, the most appropriate for its type, it is necessary to create a table “object-property”, where libraries are objects and individual and equal dimension vectors (sets) of characteristic classification features are properties. To do this you should: form the set of libraries that are the objects of clustering; define for each library the set of classification features and its power (volume) in the same nominal scale; choose the value scale of classification features; form a table object-property. This technology is implemented in the environment of MsExcel-2003. It includes the transformation of one-dimensional data into multi-dimensional indexes, using the descriptive statistics and distributions of individual parameters, the creation of the “object-property” table, the building of the proximity matrix, the definition of the dendrogram structure and the cluster interpretation. The application of clustering method can further focus on creating algorithms of effective information search, and also building the scientifically-reasonable classification systems orientated on the library science. The method of hierarchical agglomerative cluster analysis can be used with typological or semantic distribution of library funds, or studying of their thematic and specific composition. This method can be considered as universal, that gives an opportunity to formalize the typology division of any objects of librarianship.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 1; 35-41
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of road safety measures by elderly pedestrians based on K-Means clustering and hierarchical cluster analysis
Autorzy:
Leonardi, Salvatore
Distefano, Natalia
Pulvirenti, Giulia
Powiązania:
https://bibliotekanauki.pl/articles/1833631.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
road traffic
safety measures
road safety
cluster analysis
human factor
vulnerable users
elderly pedestrians
ruch drogowy
środki bezpieczeństwa
bezpieczeństwo na drogach
analiza skupień
czynnik ludzki
wrażliwi użytkownicy
Opis:
Introduction: Pedestrians aged over 65 are known to be a critical group in terms of road safety because they represent the age group with the highest number of fatalities or injured people in road accidents. With a current ageing population throughout much of the developed world, there is an imminent need to understand the current transportation requirements of older adults, and to ensure sustained safe mobility and healthy. Objectives: The aim of this study is to capture and analyze the key components that influence the identification of design solutions and strategies aimed at improving the safety of pedestrian paths for elderly. Method: A survey was conducted in 5 different locations in Catania, Italy. The locations were specifically chosen near to attraction poles for elderly pedestrians (e.g. centers for the elderly, squares, churches). Participants were recruited in person, so as to select exclusively people over 70. The sample comprised 322 participants. Both Hierarchical and K-Means clustering were used in order to explore which solutions elderly pedestrian propose for improving the safety of pedestrian path. Results: The results show that the judgment expressed by the elderly on the solutions for improving pedestrian safety is linked to the gender, to the experience as road users, and to mobility and vision problems. All solutions proposed regard road infrastructure (improvement of pedestrian crossings and of sidewalks, implementation of traffic calming measures, improvement of lighting), except for police supervision. Conclusion: This study has identified the factors that influence the identification of the best solutions to increase the safety level of pedestrian paths for elderly people. The aspects related to human factors considered were the gender, the factors associated with the experience as road users and the factors related to age related problems (mobility, vision and hearing problems). The results of this research could support traffic engineers, planners, and decision-makers to consider the contributing factors in engineering measures to improve the safety of vulnerable users such as elderly pedestrians.
Źródło:
Archives of Transport; 2020, 56, 4; 107-118
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification and prioritization of factors influencing the increase in construction costs of building investments using factor analysis
Autorzy:
Seyedebrahimi, Seyedkazem
Mirjalili, Alireza
Sadeghian, Abolfazl
Powiązania:
https://bibliotekanauki.pl/articles/1852306.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
koszt
projekt budowlany
analiza hierarchiczna
Yazd
czynnik zarządzania
czynnik środowiskowy
czynnik prawno-administracyjny
cost
construction project
hierarchical analysis
management factor
environmental factor
legal and administrative factor
Opis:
A large portion of the credits and financial resources of countries is spent on the preparation and construction of building projects because their implementation would create housing, job opportunities, financial turnover, and economic prosperity. At present, many construction projects are under construction in developing countries, and most of these projects are facing rising costs. The local scope of this research is construction projects in Yazd city. This research is operational in terms of purpose and was carried out in a descriptive and survey manner with an analytical-mathematical method. Data collection was done by documentary and survey methods. The Statistical Society consisted of 150 managers and officials, contractors, and actors involved in construction projects. Data analysis by hierarchical analysis technique showed that the criterion of management factors with a weight of 0.582 has the highest priority in increasing building costs. The criterion of environmental factors with a weight of 0.309 is at the second priority. The criterion of legal and administrative factors with a weight of 0.109 is in the third priority. Therefore, a key element in increasing the cost of construction projects in the under-studied city is the management factor that can be reduced by establishing new management systems and improving the quality of construction projects.
Źródło:
Archives of Civil Engineering; 2021, 67, 3; 705-722
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An identification source of variation on the water quality pattern in the Malacca River basin using chemometric approach
Autorzy:
Hua, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/204612.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hierarchical cluster analysis
discriminant analysis
principal component analysis
multiple linear
regression analysis
Opis:
The Malacca River basin experienced river water pollution which caused a major deterioration to the ecosystems and environmental health. This study is carried out to assess the water quality data and identify the pattern of water pollution sources in the study area, and also to develop a predictive performance of water quality in the Malacca River basin. A chemometric approach using a combination of HCA, DA, PCA, and MLR, was applied into twenty water quality variables from nine sampling stations that were collected from January until December of 2015 in the river basin. HCA pointed out three clusters, namely Cluster 1 (C1) with low pollution source, Cluster 2 (C2) with moderate pollution source, and Cluster 3 (C3) with high pollution source. In the DA analysis, the results showed 21 variables, 12 variables, and 9 variables for standard mode, forward stepwise mode, and backward stepwise mode, respectively. Meanwhile, the PCA indicated that the main source of pollutants is detected from residential, industrial, commercial, agricultural, animal livestock, as well as forest land. Among the three models developed from MLR analysis, C3 with a high pollution source is detected to be the most suitable model to be used for the prediction of Water Quality Index in the Malacca River basin. This study proposed for an effective river water quality management by having new water quality monitoring network to be designed for more practical use in order to reduce time and effort, as well as cost saving purposes.
Źródło:
Archives of Environmental Protection; 2018, 44, 4; 111-122
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Multivariate Statistical Methods to the Hydrochemical Study of Groundwater Quality in the Sahel Watershed, Algeria
Autorzy:
Hakim, Djafer Khodja
Amina, Aichour
Amina, Rezig
Djouhra, Baloul
Ahmed, Ferhati
Powiązania:
https://bibliotekanauki.pl/articles/2173331.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydrochemical analysis
water quality
groundwater
principal component analysis
hierarchical cluster analysis
Sahel watershed
Opis:
The quality of groundwater is characterized by several numbers of physical and chemical parameters, which determine the use of water (water supply, irrigation, industry). This search paper is a contribution made to know the hydrochemical characteristics of groundwater in the Sahel sub-catchment which belongs to the large Soummam North basin of Algeria. Different multivariate statistical techniques were used such as principal component analysis (PCA), Hierarchical Cluster Analysis (HCA) and Diagram Analysis. These analyses are exercised to a dataset formed from 37 boreholes with 12 chemical variables over the entire surface of the watershed. The samples were collected in 2016. The 37 boreholes are one of the main water resources that supply the wilaya of Bouira with drinking water and irrigation. The analysis of water quality using different methods (ACP, HCA and Diagram) resulted in two chemical kinds: (Chloride, calcium sulfate and magnesium), and (Bicarbonate calcium and magnesium). The results have shown that 74% of the boreholes were contaminated, the rest of boreholes were characterized by a good quality and they have not suffered any contamination and can be consumed without any risk.
Źródło:
Journal of Ecological Engineering; 2022, 23, 8; 341--349
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Multivariate Statistical Analysis of Hydrochemical Data for the Identification of the Geochemical Processes in the Tirana-Fushe Kuqe Alluvial Aquifer, North-Western Albania
Autorzy:
Raço, Endri
Beqiraj, Arjan
Cenameri, Sabina
Jahja, Aurela
Powiązania:
https://bibliotekanauki.pl/articles/2173334.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Tirana-Fushe Kuqe aquifer
groundwater
multivariate analysis
principal component analysis
hierarchical cluster analysis
Opis:
During the research, 71 groundwater samples were collected over a 300 km2 area of Tirana-Fushe Kuqe alluvial aquifer extension (central-western Albania) and subsequently analyzed for 11 parameters (pH, K+, Na+, Ca2+, Mg2+, HCO3-, Cl-, SO42-, NO3-, TH and TDS). Both geochemical conventional (Piper and Chadha diagrams) methods of groundwater classification and multivariate statistical (principal components analysis – PCA and hierarchical cluster analysis – HCA) methods were applied to the dataset to evidence the geochemical processes controlling groundwater geochemistry evaluation through the aquifer. The conventional geochemical methods revealed four (G1–G4) hydrochemical groups where the dominant group is G2 the samples of which are from unconfined to semiconfined recharge zone and the majority of them have Ca-Mg-HCO3 groundwater. Group G3 includes the samples from the confined coastal aquifer having Na-Cl groundwater. Group G1 includes three groundwater samples of Ca-Mg-SO4 from the central part of the aquifer, while group G4, the samples of which are spatially located between G3 and G2 zones, has Na-HCO3 groundwater. The first four components of the PCA account for 85.35% of the total variance. Component PC1 is characterized by very high positive loadings of TH, Ca2+, and Mg2+, suggesting the importance of dissolution processes in the aquifer recharge zone. Component PC2 is characterized by very high positive loadings in Na+, K+, and Cl-and moderate to high loadings of TDS, revealing the involvement of seawater intrusion and diffusion from clay layers. On the basis of their variable loadings, the first two components are defined as the “hardness” and “salinity”, respectively. The HCA produced four geochemically distinct clusters, C1–C4. The samples of cluster C1 are from the coastal confined aquifer and their groundwater belongs to the Na-Cl type. The samples from cluster C2 are located in the south and east recharge areas and most of them have Ca–Mg–HCO3 groundwater, while the samples from cluster C3, which are located in the northeastern recharge zone, have Mg-Ca–HCO3 groundwater. Finally, cluster C4 includes two groundwater subgroups having Na-Cl-HCO3 and Na-Mg-Cl-HCO3 groundwater in the vicinity of cluster C1 as well as Na-HCO3-Cl and Na-Mg-HCO3-Cl groundwater next to cluster C2 and C3.
Źródło:
Journal of Ecological Engineering; 2022, 23, 8; 327--340
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of binary data transformation in categorical data clustering
Autorzy:
Cibulková, Jana
Šulc, Zdenek
Sirota, Sergej
Rezanková, Hana
Powiązania:
https://bibliotekanauki.pl/articles/1194463.pdf
Data publikacji:
2019-07-02
Wydawca:
Główny Urząd Statystyczny
Tematy:
hierarchical cluster analysis
nominal variable
binary variable
categorical data
similarity measures
evaluation criteria
generated data
Opis:
This paper focuses on hierarchical clustering of categorical data and compares two approaches which can be used for this task. The first one, an extremely common approach, is to perform a binary transformation of the categorical variables into sets of dummy variables and then use the similarity measures suited for binary data. These similarity measures are well examined, and they occur in both commercial and non-commercial software. However, a binary transformation can possibly cause a loss of information in the data or decrease the speed of the computations. The second approach uses similarity measures developed for the categorical data. But these measures are not so well examined as the binary ones and they are not implemented in commercial software. The comparison of these two approaches is performed on generated data sets with categorical variables and the evaluation is done using both the internal and the external evaluation criteria. The purpose of this paper is to show that the binary transformation is not necessary in the process of clustering categorical data since the second approach leads to at least comparably good clustering results as the first approach.
Źródło:
Statistics in Transition new series; 2019, 20, 2; 33-47
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie oddziaływania na środowisko różnych metod technologii unieszkodliwiania odpadów wydobywczych z wykorzystaniem metody AHP
Comparison of the environmental impact of different methods of mining waste disposal technology using AHP method
Autorzy:
Kubicz, J.
Hämmerling, M.
Walczak, N.
Powiązania:
https://bibliotekanauki.pl/articles/401094.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hierarchiczna analiza problemu
odpady poflotacyjne
oddziaływanie na środowisko
zbiornik
hierarchical problem analysis
flotation tailings
environmental impact
tailing pond
Opis:
Eksploatacja składowisk wszelkiego rodzaju odpadów niesie za sobą różnego rodzaju problemy dotyczące m. in. ich unieszkodliwiania oraz wpływu zgromadzonych zanieczyszczeń na środowisko naturalne. Na składowiskach gromadzone mogą być odpady np. poflotacyjne z zakładów wzbogacania rudy. Pomimo stosowania przez firmy/koncerny najnowocześniejszych metod wydobycia i przetwarzania rud miedzi oraz wprowadzenia nowoczesnych systemów organizacji i zarządzania produkcją obszar zlokalizowany najbliżej zbiornika jest narażony na jego działanie. Wiele rodzajów odpadów stanowi cenne źródło surowców wtórnych, które nadają się do wykorzystania przez różne gałęzie przemysłu. Przykładem takich surowców są odpady górnicze (poflotacyjne), zazwyczaj obojętne środowisku, których wytwarzana ilość w procesie eksploatacji kopalin jest znaczna. W artykule porównano różne metody technologiczne składowania odpadów wydobywczych z wykorzystaniem metody AHP i ich wpływ na środowisko.
Exploitation of tailing ponds sites for storing all types of waste materials creates multiple problems concerning waste disposal and the environmental impact of the waste. Tailing ponds waste may comprise e.g. flotation tailings from ore enrichment plants. Despite the fact that companies / corporations use state-of-the-art methods of extraction and processing of copper ore, and introduce modern systems of organization and production management, the area located closest to the reservoir is exposed to its negative effects. Many types of waste material are a valuable source of secondary raw materials which are suitable for use by various industries. Examples of such materials are mining waste (flotation tailings), usually neutral to the environment, whose quantities produced in the process of exploitation of minerals is sizeable. The article compares different technological methods of mining waste disposal using AHP method and their environmental impact.
Źródło:
Inżynieria Ekologiczna; 2016, 47; 131-136
2081-139X
2392-0629
Pojawia się w:
Inżynieria Ekologiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hierarchical Bi-LSTM based emotion analysis of textual data
Autorzy:
Mahto, Dashrath
Yadav, Subhash Chandra
Powiązania:
https://bibliotekanauki.pl/articles/2173676.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
emotion analysis
machine learning
emotion detection
deep learning
hierarchical Bi-LSTM
analiza emocji
uczenie maszynowe
wykrywanie emocji
głęboka nauka
hierarchiczna dwukierunkowa pamięć krótkotrwała
Opis:
Nowadays, Twitter is one of the most popular microblogging sites that is generating a massive amount of textual data. Such textual data is intended to incorporate human feelings and opinions with related events like tweets, posts, and status updates. It then becomes difficult to identify and classify the emotions from the tweets due to their restricted word length and data diversity. In contrast, emotion analysis identifies and classifies different emotions based on the text data generated from social media platforms. The underlying work anticipates an efficient category and prediction technique for analyzing different emotions from textual data collected from Twitter. The proposed research work deliberates an enhanced deep neural network (EDNN) based hierarchical Bi-LSTM model for emotion analysis from textual data; that classifies the six emotions mainly sadness, love, joy, surprise, fear, and anger. Furthermore, the emotion analysis result obtained by the proposed hierarchical Bi-LSTM model is being compared and validated with the traditional hybrid CNN-LSTM approach regarding the accuracy, recall, precision, and F1-Score. It can be observed from the results that the proposed hierarchical Bi-LSTM achieves an average accuracy of 89% for emotion analysis, whereas the existing CNN-LSTM model achieved an overall accuracy of 75%. This result shows that the proposed hierarchical Bi-LSTM approach achieves desired performance compared to the CNN-LSTM model.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 3; art. no. e141001
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Institutional Quality and its Impact on FDI Inflow: Evidence from the EU Member States
Jakość instytucjonalna i jej wpływ na zagraniczne inwestycje bezpośrednie: przykład państw członkowskich Unii Europejskiej
Autorzy:
Dobrowolska, Bogusława
Dorożyński, Tomasz
Kuna‑Marszałek, Anetta
Powiązania:
https://bibliotekanauki.pl/articles/2033924.pdf
Data publikacji:
2021-12-17
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
ZIB
instytucje
jakość instytucjonalna
hierarchiczna analiza skupień
państwa członkowskie Unii Europejskiej
FDI
institutions
institutional quality
hierarchical cluster analysis
EU Member States
Opis:
The aim of the article is to assess institutional quality in 28 EU Member States and to examine the relationship between the quality of institutions and FDI inward stock as % of GDP. This study is structured as follows. Firstly, we reviewed studies dedicated to the relationship between institutional quality and investment attractiveness. Then, we discussed FDI inflow into the EU countries and selected diagnostic variables that later served as the basis for our research in which we used categories of the Global Competitiveness Index. Based on rankings and using statistical methods, in the next stage, we divided the EU Member States into groups representing similar institutional quality. Then we investigated the relationships between groups of countries similar to one another when it comes to institutional quality and groups of countries ranked in ascending order by the value of foreign direct investment inflow measured as FDI inward stock as % of GDP. The study demonstrated that the EU Member States differ with respect to institutional quality. The results of the statistical analysis have provided grounds to positively verify the hypothesis about a positive relationship between the level of institutional quality and investment attractiveness.
Celem artykułu jest ocena jakości instytucjonalnej w 28 państwach członkowskich UE oraz próba oceny zależności pomiędzy jakością instytucjonalną a poziomem napływu zagranicznych inwestycji bezpośrednich (ZIB). Opracowanie ma następującą strukturę. Po pierwsze, dokonaliśmy przeglądu badań poświęconych związkom między jakością instytucjonalną a atrakcyjnością inwestycyjną. Następnie omówiliśmy napływ ZIB do krajów UE i wybraliśmy zmienne diagnostyczne, które posłużyły za podstawę do dalszej analizy. W tym celu posłużyliśmy się miernikami Globalnego Indeksu Konkurencyjności. W kolejnym etapie wykorzystując rankingi i metody statystyczne podzieliliśmy państwa członkowskie UE na grupy o zbliżonym poziomie jakości instytucjonalnej. Następnie zbadaliśmy zależności między podobnymi do siebie grupami krajów oraz grupami państw uszeregowanych według wartości napływu ZIB jako % PKB. Badanie wykazało, że państwa członkowskie UE różnią się wyraźnie pod względem jakości instytucjonalnej. Wyniki analiz statystycznych dały podstawę do pozytywnej weryfikacji hipotezy o pozytywnym związku między poziomem jakości instytucjonalnej a atrakcyjnością inwestycyjną.
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2021, 24, 4; 23-44
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multivariate analysis of hierarchical classification in split plot design with respect to the control
Autorzy:
Kuna-Broniowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/26467.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
multivariate analysis
hierarchical classification
split plot design
Źródło:
International Agrophysics; 2000, 14, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Monte Carlo investigation of two distance measures between statistical populations and their application to cluster analysis
Miary odległości pomiędzy populacjami statystycznymi i ich zastosowanie w analizie skupień - Badanie Monte Carlo
Autorzy:
Rossa, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/904614.pdf
Data publikacji:
1997
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
hierarchical cluster analysis methods
robustness of the nearest neighbour method
the Mahalanobis distance
the Kullback-Leibler divergence
the Marczewski-Steinhaus distance measure
Opis:
The paper deals with a simulation study of one of the well-known hierarchical cluster analysis methods applied to classifying the statistical populations. In particular, the problem of clustering the univariate normal populations is studied. Two measures of the distance between statistical populations are considered: the Mahalanobis distance measure which is defined for normally distributed populations under assumption that the covariance matrices are equal and the Kullback-Leibler divergence (the so called Generalized Mahalanobis Distance) the use of which is extended on populations of any distribution. The simulation study is concerned with the set of 15 univariate normal populations, variances of which are chanched during successive steps. The aim is to study robustness of the nearest neighbour method to departure from the variance equality assumption when the Mahalanobis distance formula is applied. The differences between two cluster families, obtained for the same set of populations but with the different distance matrices applied, are studied. The distance between both final cluster sets is measured by means of the Marczewski-Steinhaus distance.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 1997, 141
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena uciążliwości geologiczno-górniczych warunków eksploatacji węgla kamiennego i ich wpływ na koszty prac górniczych
Assessing geological and mining nuisance and its impact on the cost of exploitation in hard coal mines
Autorzy:
Sobczyk, E. J.
Kopacz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075838.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
wydobycie węgla kamiennego
hierarchiczna analiza problemu
AHP
proces wydobywczy
koszty wydobycia
hard coal mining
Hierarchical Problem Analysis
mining process
costs of mining
Opis:
This article presents the use of the multi-criterion Analytic Hierarchy Process (AHP) method to assess the nuisance of geological and mining conditions to the longwall mining operations in selected coal mines in Poland. For this purpose, a methodology has been developed to calculate the exploitation nuisance index WUe in the context of coal mining costs in individual longwalls. Components of the nuisance index include four sub-indicators: natural hazard index (UZN), index describing the seam parameters (UPZ), index describing the technical parameters (UT), and environmental impact index (US). The analysis showed a strong correlation between the level of nuisance to the exploitation and the operating costs of these longwalls. The design of the longwall schedule should therefore also take into account the nuisance arising from the geological and mining conditions of the operations. Selective mining management allows optimizing the costs of mining in underground mines using the longwall system. This knowledge can also be used to reduce the total operating costs of mines as a result of abandoning the accessing and mining works in longwalls, and parts and entire areas of mines, which could be permanently unprofitable. Finally, it should be added that underground mines currently do not employ this type of solution, which even more emphasizes the need to popularize this approach.
Źródło:
Przegląd Geologiczny; 2018, 66, 3; 177--184
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Human error in pilotage operations
Autorzy:
Ernstsen, J.
Nazir, S.
Powiązania:
https://bibliotekanauki.pl/articles/117463.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
safety at sea
human error
Systematic Human Error Reduction and Prediction Approach (SHERPA)
pilotage operations
sociotechnical system
maritime domain
Hierarchical Task Analysis (HTA)
safety climate
Opis:
Pilotage operations require close interaction between human and machines. This complex sociotechnical system is necessary to safely and efficiently maneuver a vessel in constrained waters. A sociotechnical system consists of interdependent human- and technical variables that continuously must work together to be successful. This complexity is prone to errors, and statistics show that most these errors in the maritime domain are due to human components in the system (80 ? 85%). This explains the attention on research to reduce human errors. The current study deployed a systematic human error reduction and prediction approach (SHERPA) to shed light on error types and error remedies apparent in pilotage operations. Data was collected using interviews and observation. Hierarchical task analysis was performed and 55 tasks were analyzed using SHERPA. Findings suggests that communication and action omission errors are most prone to human errors in pilotage operations. Practical and theoretical implications of the results are discussed.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 49-56
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distributed situation awareness in a demanding maritime operation: a case study of the subsea segment
Autorzy:
Norstein, E.
Sharma, A.
Jungefeldt, S.
Nazir, S.
Powiązania:
https://bibliotekanauki.pl/articles/117317.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
offshore wind farms
situation awareness
subsea segment
maritime operation
Hierarchical Task Analysis (HTA)
Distributed Situation Awareness (DSA)
Critical Decision Method (CDM)
Remotely Operated Vessel (ROV)
Opis:
Maritime subsea operations have increased significantly in size and complexity during the last decades as a result of the advances in the offshore oil industry. Despite the fact that subsea operations can involve hundreds of personnel, working together with complex technology, limited research can be found regarding the operations in the available literature. This study aims to analyze a routine subsea operation using the Distributed Situation Awareness (DSA) framework and understand how the operators on board maintain their DSA in routine operations through a case study. In order to understand how the operation unfold in complex sociotechnical systems and how situational awareness (SA) is distributed across agents and artefacts, the theoretical framework of DSA can be useful as the focus is on the interactions at a systemic level. To achieve the research objectives, a combination of qualitative methods was utilized to illustrate DSA on board a subsea vessel. Initially an observation was conducted during a live subsea survey operation to capture the interaction between personnel and instruments. Furthermore, all observed personnel were subjected to retrospective interviews to elicit further knowledge of the operation. Finally, the data was analyzed according to the propositional network approach and Hierarchical Task Analysis (HTA). The result of this study portrays the SA of a subsea survey operation as propositional networks for the main phases identified in the HTA. The main findings of the study show a significantly difference in DSA among the Bridge personnel and personnel located in the Online Control Room (ONCR). Furthermore, it was found that the dynamic of the system allowed personnel to have different level of DSA without jeopardizing the overall operation. Finally, the summary of the findings provides a basic understanding of how a routine subsea survey operation unfolds.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 811-822
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time analysis and classification of bioaerosols based on optical scattering properties
Analiza i klasyfikacja bioaerozoli w czasie rzeczywistym w oparciu o właściwości rozpraszania światła
Autorzy:
Kaliszewski, M.
Trafny, E. A.
Włodarski, M.
Lewandowski, R.
Stępińska, M.
Kwaśny, M
Kostecki, J.
Kopczyński, K.
Powiązania:
https://bibliotekanauki.pl/articles/208659.pdf
Data publikacji:
2017
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
klasyfikacja bioaerozoli
rozpraszanie
analiza wielkości i kształtu cząstek
wykrywanie bojowych środków biologicznych
bioaerosol classification
scattering
particle size and shape analysis
biological warfare agents’ detection
hierarchical cluster analysis (HCA)
HCA
Opis:
The size and shape of biological particles are important parameters allowing discrimination between various species. We have studied several aerosols of biological origin such as pollens, bacterial spores and vegetative bacteria. All of them presented different morphology. Using optical size and shape analyser we found good correlation between light scattering properties and actual particle features determined by scanning electron and fluorescence microscopy. In this study, we demonstrated that HCA (Hierarchical Cluster Analysis) offers fast and continuous bioaerosol classification based on shape and size data matrices of aerosols. The HCA gives an unequivocal interpretation of particle size vs. asymmetry data. Therefore, it may provide high throughput and reliable screening and classification of bioaerosols using scattering characteristics.
Rozmiar i kształt cząstek biologicznych są ważnymi parametrami pozwalającymi na rozróżnianie pomiędzy różnymi rodzajami cząstek. Przeprowadzone zostały badania aerozoli pochodzenia biologicznego takich jak pyłki roślin, przetrwalniki oraz wegetatywne bakterie. Substancje te wykazywały różne właściwości morfologiczne. W wyniku przeprowadzonych badań przy pomocy optycznego analizatora wielkości i kształtu cząstek znaleziona została wysoka korelacja pomiędzy właściwościami rozpraszania światła a rzeczywistymi właściwościami cząstek określonymi na podstawie SEM (Skaningowego Mikroskopu Elektronowego) oraz mikroskopu fluorescencyjnego. Przedstawione badania pokazują, że HCA (Hierarchical Cluster Analysis) umożliwia szybką, wiarygodną, prowadzoną w sposób ciągły analizę i klasyfikację bioaerozoli w oparciu o ich charakterystyki rozproszeniowe.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2017, 66, 1; 27-40
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza podobieństwa rodzin mieszańcowych truskawki powtarzającej owocowanie pod względem wielkości i jakości plonu owoców
Analysis of the similarities between hybrid families of everbearing strawberry in relation to fruit yield and quality
Autorzy:
Sieczko, Leszek
Masny, Agnieszka
Mądry, Wiesław
Żurawicz, Edward
Powiązania:
https://bibliotekanauki.pl/articles/41510559.pdf
Data publikacji:
2008
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
hierarchiczna analiza skupień
analiza składowych głównych
cechy jakości owoców
plon owoców
truskawka powtarzająca owocowanie
hierarchical cluster analysis
principal components analysis
characteristics of fruit quality
fruit yield
everbearing strawberry
Opis:
W pracy podjęto próbę wyznaczenia związków pomiędzy plonem owoców truskawki powtarzającej owocowanie i cechami jakości owoców. Użyte do analizy statystycznej dane (wyniki) oceny polowej 1280 siewek, należących do 32 rodzin mieszańcowych pochodziły z Instytutu Sadownictwa i Kwiaciarstwa w Skierniewicach. Zmienność obiektów badano z użyciem analizy składowych głównych, a następnie zastosowano hierarchiczną analizę skupień metodą Warda do wydzielania 3 grup jednorodnych.
The paper describes the attempt made to determine the relationships between fruit yield and quality of everbearing strawberry. The results of field evaluation of 1280 strawberry seedlings belonging to 32 hybrid families came from the Institute of Pomology and Floriculture in Skierniewice. Variability of the experimental objects was evaluated using the principal components analysis. Afterwards, Ward’s hierarchical clustering method was applied to distinguish homogeneous groups of objects.
Źródło:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2008, 250; 297-307
0373-7837
2657-8913
Pojawia się w:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:
Biblioteka Nauki
Artykuł
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