Методы Сравнительной Оценки Результатов Кластерного Анализа Структуры Гидробиоценозов (На Примере Зоопланктона Реки Линда Нижегородской Области)

Якимов, В. Н.; Черепенников, В. В.; Ильин, М. Ю.; Yakimov, B. N.; Шурганова, Г. В.; Cherepennikov, V. V.; Кудрин, И. А.; Il’in, M. Yu.

doi:10.7868/s0320965216020169

Cited by 2 publications

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“…Indicators of the sum of squares of distances between points within the cluster and the average width of the silhouette [24,25] allow us to assess the quality of clustering. For the sum of squared distances, the "elbow bend" method is used [22,26] to determine the optimal number of clusters, and the local maximum of the silhouette width value allows you to select the number of clusters with the best separation. Thus, the optimal number of partitioning groups -clusters is five for the agglomerative and eight for the divisional clustering algorithm (Figure 5).…”

Section: Economic Effectmentioning

confidence: 99%

Structuring advertising campaign costs considering the asymmetry of users’ interests

Kislyakov¹

2020

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This work is devoted to the highly topical problem of structuring costs for contextual and targeted advertising on the Internet. The choice of the ad campaign financing structure is considered from the point of view of violating the principle of symmetry of user interest in ads. The purpose of this work is to develop a methodology for structuring advertising campaign costs based on cluster analysis, taking into account the asymmetry of user interest in advertising. The key feature of the research is the description of the possibility of using the asymmetry of user interest in application solutions, such as online advertising. The Gini coefficient is used as an indicator of the degree of imbalance in the manifestation of a feature in clustering, and the features of using the lift coefficient and the Lorentz curve to evaluate the effectiveness of contextual and targeted advertising for various groups of customers are also considered. Using the Gini index and cluster analysis, you can analyze the possibilities of increasing ad revenue and compare it with the absence of any policy for structuring advertising costs. Identifying such patterns in consumer groups allows you to identify the main directions of product development and customer interest in it. The method described here should be used to improve the effectiveness of banner advertising and clustering algorithms. This approach does not improve banner clickability, but allows you to implement an individual approach to advertising products with the current number of clicks and more effectively structure the cost of various types of advertising.

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Section: Economic Effectmentioning

confidence: 99%

Structuring advertising campaign costs considering the asymmetry of users’ interests

Kislyakov¹

2020

Bus. Inform.

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ABUNDANCE OF RELATED SPECIES, <i>KELLICOTTIA BOSTONIENSIS</i> (ROUSSELET, 1908) AND <i>K. LONGISPINA</i> (KELLICOTT, 1879) (ROTIFERA: BRACHIONIDAE), IN THE COMMUNITIES OF ZOOPLANKTON OF THE PUSTYNSKAYA LAKE-RIVER SYSTEM (NIZHNY NOVGOROD OBLAST)

Шурганова

Zolotareva

Кудрин

et al. 2021

Russ. j. biol. invasions (Print)

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The article presents the features of the spatial distribution of zooplankton communities in the water area of the Pustynskaya lake-river system. The abundance of two related species of the genus Kellicottia , the alien Kellicottia bostoniensis (Rousselet, 1908) and the indigenous K. longispina (Kellicott, 1879), was analyzed in dedicated communities in 2013-2017. The greatest abundance of the alien species was noted in zooplanktocenoses of mesotrophic water bodies (the Serezha River and Lake Svyato). It was found that after the period of mass development of K. bostoniensis in 2013-2014, which might be due to the initial stage of naturalization of the alien species, its abundance had sharply decreased. In 2013-2014 the abundance of the indigenous species K. longispina (Kellicott, 1879) was significantly lower than that of the alien species. Rotifer K. longispina dominated in the Protoka and Lake Svyato in 2017. The highest density of both species was found in the metalimnion of the mesotrophic Lake Svyato. A statistically significant positive correlation was found between the abundance of K. bostoniensis and the temperature, transparency, and pH of water, as well as the abundance of predatory zooplankton species. The abundance of the native species K. longispina correlated negatively only with the value of water pH.

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Методы Сравнительной Оценки Результатов Кластерного Анализа Структуры Гидробиоценозов (На Примере Зоопланктона Реки Линда Нижегородской Области)

Cited by 2 publications

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Structuring advertising campaign costs considering the asymmetry of users’ interests

Structuring advertising campaign costs considering the asymmetry of users’ interests

ABUNDANCE OF RELATED SPECIES, <i>KELLICOTTIA BOSTONIENSIS</i> (ROUSSELET, 1908) AND <i>K. LONGISPINA</i> (KELLICOTT, 1879) (ROTIFERA: BRACHIONIDAE), IN THE COMMUNITIES OF ZOOPLANKTON OF THE PUSTYNSKAYA LAKE-RIVER SYSTEM (NIZHNY NOVGOROD OBLAST)

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