Displaying 5 results from an estimated 5 matches for "quadric".
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2008 Mar 14
1
Optimization with constraint.
Hello.
I have some problems, when I try to model an
optimization problem with some constraints.
The original problem cannot be solved analytically, so
I have to use routines like "Simulated Annealing" or
"Sequential Quadric Programming".
But to see how all this works in R, I would like to
start with some simple problem to get to know the
basics:
The Problem:
min f(x1,x2)= (x1)^2 + (x2)^2
s.t. x1 + x2 = 1
The analytical solution:
x1 = 0.5
x2 = 0.5
Does someone have some suggestions how to model it in
R with th...
2008 Mar 26
1
Optimization with nonlinear constraints
...ization problem in R:
How can I model some optimization problem in R with a
linear objective function with subject to some
nonlinear constraints?
I would like to use "optim" or "constrOptim", maybe
with respect to methods like "Simulated Annealing" or
"Sequential Quadric Programming" or something else,
which can solve the problem. But I have no idea how to
code in R!
Example:
min (x1 + x2 + x3)
s.t.
p * (a*x1 + b*x2 + c*x3)^(-3) + (1-p) * (d*x1 + e*x2 +
f*x3)^(-3) >= g
with a,b,c,d,e,f,g,p constant > 0 and x1,x2,x3 > 0
also: a,b,c > d,e,f
I hop...
2003 Jun 04
3
bge drivers does not work for 3COM 3C996-SX / 3C996B-T
...ails, and heavy pings crash the 4.8 machine. Similarly
changing the interface configuration with ifconfig tends to crash the
4.8 machine (mtu, link0, up/down, etc). The behaviour is somewhat hard
to diagnose, since there's no panic - just a hard lock.
The 4.8-R machine:
$ uname -a
FreeBSD quadric.dsl.isometry.net 4.8-RELEASE FreeBSD 4.8-RELEASE #0: Sun
Apr 6 19:46:37 UTC 2003
root@quadric.dsl.isometry.net:/usr/obj/usr/src/sys/QUADRIC i386
$ ifconfig bge0
bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<rxcsum,txcsum>
inet 192.168....
2003 Jan 21
1
(v2) quadratic trends and changes in slopes (R-help digest, Vol 1 #52 - 16 msgs)
...))
Contrasts<-lm(y~Linear+Quadratic+Cubic)
Contrasts.anova<-anova(Contrasts)
Contrasts.anova
# Calculate the F-test and P-value for Nonlinear
SS.Quadratic<-Contrasts.anova$"Sum Sq"[2]
SS.Cubic<-Contrasts.anova$"Sum Sq"[3]
SS.Nonlinear<-SS.Quadratic+SS.Cubic
DF.Quadric<-Contrasts.anova$"Df"[2]
DF.Cubic<-Contrasts.anova$"Df"[3]
DF.Nonlinear<-DF.Quadric+DF.Cubic
SS.Residuals<-Contrasts.anova$"Sum Sq"[4]
DF.Residuals<-Contrasts.anova$"Df"[4]
Nonlinear.test<-(SS.Nonlinear/DF.Nonlinear)/(SS.Residuals/DF.Resid...
2017 Apr 28
0
Wine release 2.7
...32: 3DES has a different ALG_ID.
secur32/tests: Add tests with SECPKG_ATTR_KEY_INFO.
secur32: Add support for SECPKG_ATTR_KEY_INFO.
secur32: Return PRF algorithm value when using GCM.
Alexandre Julliard (14):
glu32: Import projection functions from Mesa.
glu32: Import quadric functions from Mesa.
glu32: Import mipmap functions from Mesa.
glu32: Import tessellation functions from Mesa.
libwine: Set a non-null entry for the GDT selector to make sure it's properly reserved.
libwine: Clear the %fs register we got from Android to force allocating...