Comments on the analytical structure of turbulent diffusion

1975 ◽  
Vol 19 (4) ◽  
pp. 399-403
Author(s):  
Jiří Horák ◽  
J. Navrátil
Keyword(s):  
Turbulent Diffusion ◽  
Analytical Structure

Influence of different fuzzy operators on analytical structure and variable gains of typical interval type-2 fuzzy PI controller

2020 ◽  
Vol 39 (3) ◽  
pp. 4319-4329
Author(s):  
Haibo Zhou ◽  
Chaolong Zhang ◽  
Shuaixia Tan ◽  
Yu Dai ◽  
Ji’an Duan ◽  
...  
Keyword(s):  
Pi Controller ◽  
Real Time Control ◽  
Fuzzy Operators ◽  
Fuzzy Operator ◽  
Analytical Structure ◽  
Product Operator ◽  
Pi Controllers ◽  
Fuzzy Pi Controller ◽  
Interval Type

The fuzzy operator is one of the most important elements affecting the control performance of interval type-2 (IT2) fuzzy proportional-integral (PI) controllers. At present, the most popular fuzzy operators are product fuzzy operator and min() operator. However, the influence of these two different types of fuzzy operators on the IT2 fuzzy PI controllers is not clear. In this research, by studying the derived analytical structure of an IT2 fuzzy PI controller using typical configurations, it is proved mathematically that the variable gains, i.e., proportional and integral gains of typical IT2 fuzzy PI controllers using the min() operator are smaller than those using the product operator. Moreover, the study highlights that unlike the controllers based on the product operator, the controllers based on the min() operator have a simple analytical structure but provide more control laws. Real-time control experiments on a linear motor validate the theoretical results.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

Approaches for Analysing Norm Relationships

2017 ◽  
Author(s):  
Henning Grosse Ruse-Khan
Keyword(s):  
Conflict Resolution ◽  
Intellectual Property ◽  
International Law ◽  
Structure Building ◽  
Analytical Structure ◽  
Rules And Principles ◽  
Logical Order ◽  
International Law Commission ◽  
Rule Systems ◽  
Law Commission

This chapter discusses conflict-resolution tools and develops an analytical structure building on rules and principles in international intellectual property (IP) treaties, other rule-systems, and general international law to define norm relationships of interpretation and of conflict. Several tools are taken from the ‘toolbox’ developed in the Fragmentation Report of the International Law Commission and other fragmentation literature. Depending on the type of relationship at stake, the most appropriate legal tools to address them may vary. The ILC Report and Conclusions provide for some of the tools and to some extent for an analytical structure, a logical order for examining these relationships. As the chapter shows, for some types of legal relations other approaches are more adequate. They hence complement the ILC principles and need to be integrated in the set of tools available.

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