Abstract
The use of artificial intelligence techniques such as fuzzy logic, neural networks and evolutionary computation is currently very important in medicine to be able to provide an effective and timely diagnosis. The use of fuzzy logic allows to design fuzzy classifiers, which have fuzzy rules and membership functions, which are designed based on the experience of an expert. In this particular case a fuzzy classifier of Mamdani type was built, with 21 rules, with two inputs and one output and the objective of this classifier is to perform blood pressure level classification based on knowledge of an expert which is represented in the fuzzy rules. Subsequently different architectures were made in type-1 and type-2 fuzzy systems for classification, where the parameters of the membership functions used in the design of each architecture were adjusted, which can be triangular, trapezoidal and Gaussian, as well as how the fuzzy rules are optimized based on the ranges established by an expert. The main contribution of this work is the design of the optimized interval type-2 fuzzy system with triangular membership functions. The final type-2 system has a better classification rate of 99.408% than the type-1 classifier developed previously in “Design of an optimized fuzzy classifier for the diagnosis of blood pressure with a new computational method for expert rule optimization” with 98%. In addition, we also obtained a better classification rate than the other architectures proposed in this work.
Highlights
Nowadays the use of artificial intelligence techniques such as fuzzy logic, neural networks and evolutionary computation help to design models with fast and efficient response that can give a precise diagnosis and help decision-making based on the experience and rules established by experts in the area in order, it is difficult to determine whether or not we have a high blood pressure level, which is why it is important to check constantly and every 24 h to monitor blood pressure (BP) samples during the course of 24 h and this information will help to have a more accurate analysis of the behavior of BP
The classification error is based in the fitness function as shows Equation (7), the thought is to limit the order mistake and this let realizing that the base classifier is arranging effectively, the best approach to know whether the classifier is characterizing accurately is following Table 1, which characterizes the BP levels
Based on the experiments performed with the different architectures, it gives the possibility of being able to compare each one of the results and reach the conclusion that the best architecture is the one that is composed of type-2 triangular membership functions, with 21 fuzzy rules and Mamdani type
Summary
Nowadays the use of artificial intelligence techniques such as fuzzy logic, neural networks and evolutionary computation help to design models with fast and efficient response that can give a precise diagnosis and help decision-making based on the experience and rules established by experts in the area in order, it is difficult to determine whether or not we have a high blood pressure level, which is why it is important to check constantly and every 24 h to monitor blood pressure (BP) samples during the course of 24 h and this information will help to have a more accurate analysis of the behavior of BP.
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