Immunity-Based Computational Models - Immunological Computation: Theory and Applications - page 58

3.6 Summary
h is chapter describes the general aspects of immunity-based models. First, the
shape-space concept, which is very important to represent the elements that are
involved in immune processes, is introduced. h en, some matching rules that
are very important to determine the a nity or similarity between immune ele-
ments are explained in detail. Accordingly, some distance measures that have been
used in immune modeling are presented. Finally, some general operations that are
inspired in immunology and have been applied in artifi cial immune models are
summarized.
3.7 Review Questions
1. List the main elements necessary to defi ne an immune model. Explain the
relations among such elements.
2. Consider a particular representation for the immune elements. h en consider
a particular immune algorithm and change the immune representation. Does
the performance of the algorithm change? In general, do the results depend
on a particular representation?
3. Defi ne other matching rules diff erent from the ones described in this
chapter.
4. Consider a particular representation for the immune elements (same as
question 2).
5. Defi ne three diff erent types of clonal selection operators.
6. Defi ne three diff erent types of somatic hypermutation.
7. D e fi ne some ways to introduce new random elements in the population.
8. Defi ne three diff erent types of a nity maturation.
9. Defi ne other representations for immune entities.
10. Defi ne other formal representations for the immune entities. What advan-
tages do your representations have with respect to those that have been used
in immune algorithms?
11. List the advantages and disadvantages of processing strings with arbitrary
length versus fi xed length strings.
12. List the advantages and disadvantages of using
a. Binary string representation
b. Real-valued vector representation
c. Hybrid representation
13. Why would a Hamming distance be suitable when a string representation is
used? Is it suitable for other representations?
14. Is it possible to defi ne a detector using a hybrid representation? Illustrate a
hybrid representation by an example.
15. Associate immune elements to each arrow in the following fi gure.