The diagnosis of coronary heart disease (CHD) is a non-trivial task that requires a careful and time-consuming examinati

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The diagnosis of coronary heart disease (CHD) is a non-trivial task that requires a careful and time-consuming examinati

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The Diagnosis Of Coronary Heart Disease Chd Is A Non Trivial Task That Requires A Careful And Time Consuming Examinati 1
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The diagnosis of coronary heart disease (CHD) is a non-trivial task that requires a careful and time-consuming examination. Hence, the application of a computer-aided diagnostic (CAD) system to assess the condition of a person of having CHD is greatly beneficial. A CAD system based on the fuzzy logic concept is proposed as in Figure 1. Blood pressure Cholesterol level Heart rate Crisp Input Figure 1 Based on advice from several experts, the categorization of CHD level can be summarized as in Table 1 below. Table 1 Type of variable Linguistic variable Linguistic value Low Medium High Low Crisp Output Blood pressure (mmHg) Cholesterol level (mg/dL) Fuzzy logic system Heart rate (BPM) CHD level (unitless) CHD level High Slow Moderate Fast Healthy Middle Sick Range 100-130 120-170 160-200 100-200 180-280 50-80 70-100 90-200 0.0-1.5 1.3-2.7 2.5-4.0 Meanwhile, all experts agreed that the following rules in Table 2 can be used to determine the CHD level of a diagnosed person.
1) Design a fuzzy logic system for the abovementioned problem based on data provided in Table 1 and 2 as follows: a. Fuzzification part - fuzzy sets and membership functions for all input variables.
b. Defuzzification part fuzzy sets and membership functions for the output, defuzzification method (choose one).
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