1. What are the contributions in "Nature-inspired optimization algorithms: challenges and open problems" ?
This paper provides an in-depth review of some recent nature-inspired algorithms with the emphasis on their search mechanisms and mathematical foundations.. These problems are discussed with the directions for future research.
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2. What is the main reason for using these test functions?
Another reason is that these test functions are typically unconstrained or with simple constraints on regular domains, while the problems in real-world applications can have many nonlinear complex constraints and the domains can be formed by many isolated regions or islands.
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3. What is the important indicator of the effectiveness of an algorithm?
From the application point of view, the most important indicator of the effectiveness of an algorithm is how efficiently it can solve a wide range of problems.
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4. What are the main characteristics of global optimizers?
Such global optimizers are typically simple, flexible and yet surprisingly efficient, which have been shown in many applications and case studies [9, 10, 11, 12, 2].
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