search for: opimizations

hi, i want to execute the following opimization problem: max r*w s.t.: w*z=1 # sum of w is 1 r, w are [nx1] vectors, z is a [nx1] vector consisting of 1 so far so good, works fine with lp the problem arises with the additional restriction w' * V * w where V is a [nxn] matrix how can i include this restriction since w arises twice? thanks, gg --

Hello, I have a system of quadratic equations (results of a Hamiltonian optimization) which I need to find the roots for. Is there a package and/or function which will find the roots for a quadratic system? Note that I am not opimizing, but rather solving the first order conditions which come from a Hamiltonian. I am basically looking for something in R that will do the same thing as fsolve in

In the documentation, it says that optimize "should only be called when the index will no longer be updated very often, but will be read a lot". Does this mean it actually has a detrimental impact on updates and inserts? In my project there will be many more reads than updates, but there will still be a lot of updates. So should I be calling Optimize once a day or something like that,

Hi, I was wondering if someone could give a brief, big picture overview of the difference between the two optimization functions nlm and nlminb. I'm not familiar with PORT routines, so I was hoping someone could give an explanation. Thanks, Angelo _________________________________________________________________ Instantly invite friends from Facebook and other social networks to join yo

...n IR, does it refer to LLVM assembly language > or to LLVM bytecode? Both. They are semantically equivalent. In particular, the in-memory compiler IR is exactly equivalent to the text and binary forms, they are jut expressed in different ways. > - In what form does LLVM (gccas) perform opimizations? Is it in LLVM assembly > or LLVM bytecode? gccas reads the text form into the in-memory form, does optimizations on the in-memory IR, then writes out the result in compressed bytecode format. > - Is there any way to dump the IR before and after each optimization? Yes, gccas is just a s...

After the upgrade my memory usage is shown like this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4592 flipl 16 0 197m 150m 2360 S 0.0 14.9 6:17.28 mongrel_rails 4585 mongrel 16 0 190m 140m 1756 S 0.0 13.9 0:52.86 mongrel_rails 4579 mongrel 16 0 200m 157m 1752 S 0.0 15.5 0:56.31 mongrel_rails 4582 mongrel 16 0 189m 139m 1752 S 0.0 13.8

Hi Devs, consider below testcase $cat test.cpp constexpr int product() { return 10*20; } int main() { const int x = product(); return 0; } $./clang test.cpp -std=c++11 -S $./clang -v clang version 9.0.0 Target: x86_64-unknown-linux-gnu $cat test.s main: .cfi_startproc # %bb.0: pushq %rbp .cfi_def_cfa_offset 16 .cfi_offset %rbp, -16 movq

Hi Nate! I don't see how that would work. Select doesn't work per element. Say we're trying to vectorize the following C++ code: if(v[0] < 0) v[0] += 1.0f; if(v[1] < 0) v[1] += 1.0f; if(v[2] < 0) v[2] += 1.0f; if(v[3] < 0) v[3] += 1.0f; With SSE assembly this would be as simple as: movaps xmm1, xmm0 // v in xmm0 cmpltps xmm1, zero // zero =