# (Aktu Btech) Application of Soft Computing Important Unit-3 Fuzzy Logic-I (Introduction)

B.Tech AKTU Quantum Book delves into the practical Application of Soft Computing. Learn about significant applications, frequently asked questions, and important takeaways for mastering this cutting-edge technology. Unit-3 Fuzzy Logic-I (Introduction)

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Important Questions For Application of Soft Computing:
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## Q1. Define fuzzy logic and its importance in our daily life. What is role of crisp sets in fuzzy logic ?

Ans.

• 1. Fuzzy logic is a computing approach focused on “degrees of truth” rather than “true or false” (1 or 0).
• 2. Fuzzy logic contains the extreme situations of truth, 0 and 1, as well as the different states of truth in between.
• 3. Fuzzy logic enables the incorporation of human judgements into computing problems.
• 4. It provides an effective method for resolving numerous criterion conflicts and better assessing options.

Importance of fuzzy logic in daily life:

• 1. Fuzzy logic is required for Al to achieve human-like capabilities.
• 2. It is used to create intelligent systems for decision making, identification, optimisation, and control.
• 3. Many persons interested in research and development, such as engineers, mathematicians, computer software developers, and researchers, find fuzzy logic incredibly beneficial.
• 4. Fuzzy logic has been employed in a wide range of applications, including facial recognition, air conditioners, hoover cleaners, weather forecasting systems, medical diagnostics, and stock trading.

Role of crisp sets in fuzzy logic:

• 1. It contains the precise location of the set boundaries.
• 2. It provides the membership value of the set.

## Q2. Define classical set and fuzzy sets. State the importance of fuzzy sets.

Ans. Classical set:

• 1. A classical set is a grouping of different things.
• 2. In a set, each unique entity is referred to as a member or an element of the set.
• 3. The classical set is defined in a way that divides the universe of discourse into two groups: members and non-members.

Fuzzy set:

• 1. Fuzzy set is a set having degree of membership between 1 and 0.
• 2. Fuzzy sets Ā in the universe of discourse U can be defined as set of ordered pair and it is given by

Where μA is the degree of membership of x in Ā

Importance of fuzzy set:

• 1. It is used for the modeling and inclusion of contradiction in a knowledge base.
• 2. It also increases the system autonomy.
• 3. It act as an important part of microchip processor-based appliances.

## Q3. Consider three fuzzy sets given by:

A = ((low, 1), (medium, 0.2), (high, 0.5)

B = {(positive, 0.9), (zero, 0.4), (negative, 0.9)}

C = {(low, 0.1), (medium, 0.2), (high, 0.7)}

i. Find the fuzzy relation for the Cartesian product of A and B.

ii. Find CoR using max-min composition.

Ans.

Ans.

## Q5. Write short notes on fuzzy arithmetic.

Ans.

• 1. Fuzzy arithmetic is a generalisation of interval arithmetic in which, rather than evaluating intervals at a single fixed level, many levels in [0, 1] are examined.
• 2. This is due to the fact that a fuzzy set allows for a degree of membership for a universal set element.
• 3. It is useful in many applications, including fuzzy control, decision making, approximation reasoning, optimisation, and statistics with imprecise probabilities.

## Q6. Write note on partition and covering.

Ans. Partition:

• 1. A partition on set A is defined to be a set of non-empty subsets A, each of which is pair-wise disjoint and whose union yields the original set A.
• 2. Partition on set A is indicated as π (A), therefore

3. The members Ai of the partition are known as blocks.

Covering:

1. A covering on set A is defined to be a set of non-empty subsets Ai, whose union yields the original set A.

2. The non-empty subsets need not to be disjoint.