@CHAPTER{ iet:/content/books/10.1049/sbew525e_ch9, keywords = {objective function;Hessian matrix;classical finite difference approach;second-order adjoint sensitivities;second-order derivatives;complex algorithm;computational cost;memory storage;}, title = {Second-order adjoint sensitivities}, booktitle = Adjoint Sensitivity Analysis of High Frequency Structures with MATLABĀ®, publisher = {Institution of Engineering and Technology}, year = {2017}, pages = {221-246}, series = {Electromagnetic Waves}, doi = {10.1049/SBEW525E_ch9}, url = {https://digital-library.theiet.org/;jsessionid=2blexej3uxfb.x-iet-live-01content/books/10.1049/sbew525e_ch9} }