What are dynamic optimization problems?

Haobo Fu, Peter R. Lewis, Bernhard Sendhoff, Ke Tang, Xin Yao. What are dynamic optimization problems?. In Proceedings of the IEEE Congress on Evolutionary Computation, CEC 2014, Beijing, China, July 6-11, 2014. pages 1550-1557, IEEE, 2014. [doi]

@inproceedings{FuLSTY14,
  title = {What are dynamic optimization problems?},
  author = {Haobo Fu and Peter R. Lewis and Bernhard Sendhoff and Ke Tang and Xin Yao},
  year = {2014},
  doi = {10.1109/CEC.2014.6900316},
  url = {http://dx.doi.org/10.1109/CEC.2014.6900316},
  researchr = {https://researchr.org/publication/FuLSTY14},
  cites = {0},
  citedby = {0},
  pages = {1550-1557},
  booktitle = {Proceedings of the IEEE Congress on Evolutionary Computation, CEC 2014, Beijing, China, July 6-11, 2014},
  publisher = {IEEE},
}