Lagrangians and Portfolio Optimization
A portfolio optimization problem in Markowitz style looks like the following
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htop cheatsheet
htop is useful and bring forth very rich information on one screen. Here is the cheatsheet to understand it:
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Correct ways of deploying NFSv4
NFS is old. Its root can trace back to the remote file system in System V R3 while the first release of NFS (version 2) is in 1985 on SunOS 2.0. It must not be considered as a counterpart of Samba or CIFS, since NFS does not do user authentication...
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Threshold linear regression
Threshold regression means to do regression separately in different segments, as separated by some threshold. Take linear models as example, we have a response variable \(y\) and predictors \(X\), and additionally, we have a discriminator \(q\), which may be derived from \(X\), and set of transition functions \(g_i\). The model...
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Converting a DD-WRT router to OpenWRT
I have an old WiFi router (not my gateway, but that doesn’t matter) that used to be running DD-WRT and I am experimenting with the WiFi mesh or 802.11r roaming at home. Unfortunately the DD-WRT version is too old to do either of these – it was a Linux 2.4...
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