Application of fuzzy variable set model to evaluation of agriculture drought vulnerability

2010 ◽  
Author(s):  
Shang yang Yang ◽  
Long yun Zhang
Keyword(s):  
Fuzzy Variable ◽  
Drought Vulnerability

scholarly journals Readiness of Regions for Digitalization of the Construction Complex

2020 ◽  
Vol 7 (1) ◽  
pp. 2
Author(s):  
Ekaterina Tereshko ◽  
Marina Romanovich ◽  
Irina Rudskaya
Keyword(s):  
Fuzzy Variable ◽  
High Tech ◽  
Russian Regions ◽  
Strategic Development ◽  
Saint Petersburg ◽  
Shell Analysis ◽  
Design Documentation ◽  
Digital Development ◽  
Triangular Membership Function ◽  
Very High

The construction industry is high-tech and is one of the key areas for the strategic development of regions in terms of their digitalization. The construction complex provides regions with infrastructure of various levels from design documentation to commissioning, as well as reconstruction and major repairs of buildings. The article adopts an isolated regional approach, which is due to the need to assess specific territories by the level of readiness for digitalization of the construction complex. The purpose of the research is to determine the level of readiness of Russian regions for the digitalization of the construction complex by forming a rating of regions according to the indicator “the level of readiness of the region for digitalization of the construction complex”. To build the rating, the fuzzy sets method was applied using a triangular membership function, which allows to describe the influence of various processes on the formation of digitalization processes in the construction complex of the region. When forming the rating, a scale of fuzzy variable values is set which allows one to classify regions by levels, namely very low, low, medium, high, and very high. The generated rating is illustrated according to the specified scale. Based on the rating, the leading regions and outsider regions are identified by the formed indicator. It was determined that Moscow and Saint Petersburg are highly prepared for the digitalization of their construction complexes, and 53 regions of Russia are potentially prepared. In the future, it will be possible to create a rating of Russian regions on the level of readiness for digitalization of the construction complex with a two-year lag. Then, using the DEA shell analysis method, a quantitative assessment will be carried out that allows you to form performance boundaries and, against the background of four years, adjust the data to identify the most realistic picture. Also, the rating methodology considered by the authors allows us to scale this research to the international level, which will allow us to assess the level of digital development of construction complexes in other countries. The proposed rating algorithm is suitable for other sectors and complexes of the economy. It is enough to determine the main aggregate indicator and select groups of factors.

An epidemiological index for drought vulnerability in the Rio Grande do Norte State, Brazil

2020 ◽  
Author(s):  
Pollyanne Evangelista da Silva ◽  
Maria Helena Constantino Spyrides ◽  
Lara de Melo Barbosa Andrade ◽  
Cláudio Moisés Santos e Silva ◽  
Pedro Rodrigues Mutti ◽  
...  
Keyword(s):  
Rio Grande ◽  
Drought Vulnerability

Positive solutions and stability of fuzzy Atangana–Baleanu variable fractional differential equation model for a novel coronavirus (COVID-19)

2021 ◽  
pp. 2150059
Author(s):  
Pratibha Verma ◽  
Manoj Kumar
Keyword(s):  
Positive Solution ◽  
Fractional Derivatives ◽  
Fixed Point Theory ◽  
Fuzzy Variable ◽  
Point Theory ◽  
Equation Model ◽  
Theory Approach ◽  
Fractional Differential ◽  
Novel Coronavirus ◽  
Rassias Stability

This work provides a new fuzzy variable fractional COVID-19 model and uses a variable fractional operator, namely, the fuzzy variable Atangana–Baleanu fractional derivatives in the Caputo sense. Next, we explore the proposed fuzzy variable fractional COVID-19 model using the fixed point theory approach and determine the solution’s existence and uniqueness conditions. We choose an appropriate mapping and with the help of the upper/lower solutions method. We prove the existence of a positive solution for the proposed fuzzy variable fractional COVID-19 model and also obtain the result on the existence of a unique positive solution. Moreover, we discuss the generalized Hyers–Ulam stability and generalized Hyers–Ulam–Rassias stability. Further, we investigate the results on maximum and minimum solutions for the fuzzy variable fractional COVID-19 model.

scholarly journals Drought Vulnerability Indices in Mexico

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1671 ◽  
Author(s):  
David Ortega-Gaucin ◽  
Jesús de la Cruz Bartolón ◽  
Heidy Castellano Bahena
Keyword(s):  
Social Economic ◽  
Necessary Conditions ◽  
Environmental Indicators ◽  
Mitigation Strategies ◽  
Social Programs ◽  
Drought Vulnerability ◽  
Public Programs ◽  
Analytic Procedure ◽  
The Impact ◽  
Very High

Drought is one of the most harmful hydro climatic threats to society. Mexico has been historically affected by recurring and long-lasting droughts that have severely impacted society and the economy. Consequently, public programs and policies have been developed in order to reduce the country’s vulnerability to drought, hence the importance of identifying the spatial distribution and the dimension—even in relative terms only—of vulnerability in different regions from social, economic, and environmental perspectives. This article presents a method for obtaining indices and maps of vulnerability to drought in Mexico; indices and maps are based on a set of socioeconomic and environmental indicators that the method combines using an objective analytic procedure that identifies the most vulnerable states and municipalities from social, economic, and environmental perspectives, all of which converge in overall vulnerability to drought. The results obtained indicate that 38.9% of total Mexican population inhabits municipalities with high and very high degrees of overall vulnerability to drought. For this reason, it is necessary to continue implementing actions and preventive and mitigation strategies via public policies and social programs aimed at decreasing the country’s vulnerability to the occurrence of drought events. This is the only way to facilitate the necessary conditions to reduce the impact of drought and to decrease people’s vulnerability to this phenomenon.

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