Sponsored Content
The Lounge What is on Your Mind? Toshiba’s Optimization Algorithm Sets Speed Record for Solving Combinatorial Problems. Post 303044407 by Chubler_XL on Thursday 20th of February 2020 05:03:20 PM
Old 02-20-2020
Very cool.

I did a lot of mucking around with Simulated Annealing and the Metropolis algorithm while in uni. Using it for tasks like fitting various sized files onto minimum numbers of floppy disks, finding optimum solutions for student + classroom + teacher timetables for schools etc.

But given the money to be made in the financial realm, I can't see these algorithms making it to the public domain any time soon.
This User Gave Thanks to Chubler_XL For This Post:
 

8 More Discussions You Might Find Interesting

1. HP-UX

pst_status record problems

Hi There, We've been creating a little program that collects all the performance data available about the processes on a HP-UX system. (running HP-UX 11.11). And everything works fine apart from 4 fields in the middle of the pst_status record. Input Blocks (pst_inblock) Output Blocks... (0 Replies)
Discussion started by: cpiuk
0 Replies

2. Filesystems, Disks and Memory

dmidecode, RAM speed = "Current Speed: Unknown"

Hello, I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info: RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!! Regards :)... (0 Replies)
Discussion started by: Santi
0 Replies

3. UNIX for Advanced & Expert Users

Solving the network collisions in Unix box

Hi, Anyone can u give me an idea to clear the network collisions in the unix box(Solaris and Linux)? NIC performance is very low, and it shows collisions, when issuing the command ifconfig -a in the production server. How can i rectify the network collisions in the box. Using netstat and lsof... (4 Replies)
Discussion started by: muthulingaraja
4 Replies

4. Virtualization and Cloud Computing

Clouds (Partially Order Sets) - Streams (Linearly Ordered Sets) - Part 2

timbass Sat, 28 Jul 2007 10:07:53 +0000 Originally posted in Yahoo! CEP-Interest Here is my follow-up note on posets (partially ordered sets) and tosets (totally or linearly ordered sets) as background set theory for event processing, and in particular CEP and ESP. In my last note, we... (0 Replies)
Discussion started by: Linux Bot
0 Replies

5. UNIX for Advanced & Expert Users

iSCSI speed problems

Hi all. I was able to set up an IBM Ultrium LTO 4 tape drive to use iSCSI (using open-iscsi drivers) to communicate with Red Hat, but it's going really slow, maxing out in tar and dd tests at like 16 MB/s (using a block size of 128k). The thing is rated for 30MB/s. I feel like even though I have... (1 Reply)
Discussion started by: jeriryan87
1 Replies

6. Shell Programming and Scripting

A little help using grep for anagram solving with BASH

Hi guys, I have been making a simple script for looking for anagram solutions in a word list (a file of 22k or so words). At the moment it funtions like so: User enters an 8 character string (whatever letters you want to find anagrams of, or solve rather) The script moves all the words... (2 Replies)
Discussion started by: Donthommo
2 Replies

7. Filesystems, Disks and Memory

data from blktrace: read speed V.S. write speed

I analysed disk performance with blktrace and get some data: read: 8,3 4 2141 2.882115217 3342 Q R 195732187 + 32 8,3 4 2142 2.882116411 3342 G R 195732187 + 32 8,3 4 2144 2.882117647 3342 I R 195732187 + 32 8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies

8. UNIX for Advanced & Expert Users

Speed problems with tar'ing a 500Gb directory on an eSATA drive

I'm trying to compress a directory structure on an external hard drive, connected by eSATA cable to my linux (Ubuntu 10.04) desktop. The total volume is 500Gb with half a million files, ranging from Kb to Mb in size. The drive is 2Tb, with 0.8Tb free space before compression. running "tar -pcf... (10 Replies)
Discussion started by: omnisppot
10 Replies
ARFF(8) 						      System Manager's Manual							   ARFF(8)

NAME
arff, flcopy - archiver and copier for floppy SYNOPSIS
/usr/sbin/arff [ key ] [ name ... ] /usr/sbin/flcopy [ -h ] [ -tn ] DESCRIPTION
Arff saves and restores files on VAX console media (the console floppy on the VAX 11/780 and 785, the cassette on the 11/730, and the con- sole RL02 on the 8600/8650). Its actions are controlled by the key argument. The key is a string of characters containing at most one function letter and possibly one or more function modifiers. Other arguments to the command are file names specifying which files are to be dumped or restored. The default options are correct for the RX01 floppy on the 780; for other console media, the f and m flags are required. Files names have restrictions, because of radix50 considerations. They must be in the form 1-6 alphanumerics followed by "." followed by 0-3 alphanumerics. Case distinctions are lost. Only the trailing component of a pathname is used. The function portion of the key is specified by one of the following letters: r The named files are replaced where found on the floppy, or added taking up the minimal possible portion of the first empty spot on the floppy. x The named files are extracted from the floppy. d The named files are deleted from the floppy. Arff will combine contiguous deleted files into one empty entry in the rt-11 direc- tory. t The names of the specified files are listed each time they occur on the floppy. If no file argument is given, all of the names on the floppy are listed. The following characters may be used in addition to the letter which selects the function desired. v The v (verbose) option, when used with the t function gives more information about the floppy entries than just the name. f causes arff to use the next argument as the name of the archive instead of /dev/floppy. m causes arff not to use the mapping algorithm employed in interleaving sectors around a floppy disk. In conjunction with the f option it may be used for extracting files from rt11 formatted cartridge disks, for example. It may also be used to speed up reading from and writing to rx02 floppy disks, by using the `c' device instead of the `b' device. It must be used with TU58 or RL02 media. c causes arff to create a new directory on the floppy, effectively deleting all previously existing files. Flcopy copies the console floppy disk (opened as `/dev/floppy') to a file created in the current directory, named "floppy", then prints the message "Change Floppy, hit return when done". Then flcopy copies the local file back out to the floppy disk. The -h option to flcopy causes it to open a file named "floppy" in the current directory and copy it to /dev/floppy; the -t option causes only the first n tracks to participate in a copy. FILES
/dev/floppy or /dev/rrx?? floppy (in current directory) SEE ALSO
crl(4), fl(4), rx(4), tu(4), rxformat(8) AUTHORS
Keith Sklower, Richard Tuck BUGS
Device errors are handled ungracefully. 4th Berkeley Distribution November 16, 1996 ARFF(8)
All times are GMT -4. The time now is 04:12 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy