Hello Wolfgang, thanks for your reply.
Currently,I would like to get the sensitivity by using gradient of objective function with respect to density. The Objective function is a vector of movement which is calculated from Ax=b. J=|x|norm1 is the objective function. dJ(x,Θ)/dΘ is the gradient that we will obtain in the end. We use adjoint method written in previous emails to calculate dJ(x,Θ)/dΘ. Best regards Lance Wolfgang Bangerth <bange...@colostate.edu> 于 2023年7月24日周一 21:49写道： > On 7/24/23 11:24, Lance Zhang wrote: > > > > One moire question,how could I get ∂A(θ)/∂θx,because I did not find any > > information about density vector like θ=[θ1,θ2,...,θm],may I know if I > have > > to set density vector value in this finite element? > > Lance -- I have no idea. I don't know the program, but looking at it, I > see no > mention of the word "density" anywhere. Apparently, the person who wrote > the > program implemented an equation in which density does not appear. If you > want > that the density is part of the formulation, you should first write down > what > the specific problem is you want to solve. We can't know what it is you > want > to do. You should then compare what you want to do with what the existing > program does, and change it so that it matches to what you want it to do. > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bange...@colostate.edu > www: http://www.math.colostate.edu/~bangerth/ > > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see > https://groups.google.com/d/forum/dealii?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "deal.II User Group" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/dealii/5IN4HUV1UhY/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > dealii+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/8819fb69-2fc9-a80c-d37d-a45411d0a89b%40colostate.edu > . > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CADwW6PmT1dR%2B_ni60J-oYC792qDpWsimgX%3D5Gacs%3DJK6j0aftQ%40mail.gmail.com.
