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NEW202306.TXT

 

ON 20230601@11:19:34 AM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/method/ai/NeuralNets.htm#45078.4719212963
James Newton[JMN-EFP-786] See also:
https://mlu-explain.github.io/neural-networks/
An absolutely excellent set of animations and a live demo that explain Neural Networks from simple linear algebra up. This is a perfect companion for the Google Tensorflow Playground.



ON 20230604@6:23:37 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/idea/games.htm#45081.766400463
James Newton[JMN-EFP-786] See also:
https://archive.org/details/mac_Pyramid_of_Peril_v1
First game with procedural generation... Maybe.



ON 20230611@8:03:18 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/robot/arms.htm#45088.835625
James Newton[JMN-EFP-786] See also:
https://http://www.youtube.com/watch?v=W_f1JcTgQuc
Excellent design made simple with really large pulleys.



ON 20230612@8:14:52 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/idea/minimalcontroller.htm#45089.8436458333
James Newton[JMN-EFP-786] Says

<H3>Parsing</H3>
<blockquote>
If we take the standard <a href="../ascii.htm">ascii</a> table and divide it into 4 equal groups of 32 symbols by looking at bits 5 and 6:
<pre>
5&6 Range Contains
- - ----- --------------------------------------------
0 0 00-1F CR and LF. Others can be ignored
0 1 20-3F symbols and numbers
1 0 40-5F mostly uppercase letters - User Functions
1 1 60-7F mostly lowercase letters - User Variables
</pre>
So we test bits 5 and 6 of the ascii code and jump to a Group Handling Routine (GHR) in which we have a 5 bit field (bits 0:4) that defines either an instruction (or number), a User Function or a User Variable. Those few symbols along with the letters can be special cased. Thanks to Ken Boak for this idea.
</blockquote>



ON 20230613@7:39:02 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/os/linuxs.htm#45090.8187731481
James Newton[JMN-EFP-786] See also:
https://superuser.com/questions/1788778/forward-x11-works-but-not-into-xypher-cant-open-display-localhost11-0
Access a basic GUI desktop on a remote system without installing more than the standard Ubuntu packages. 
<PRE>
Xephyr -ac -br -keybd ephyr,,,xkbmodel=pc105,xkblayouts -noreset -screen 800x600 :2 &amp;
export DISPLAY=:2
ssh -X <i>remote-user</i>@<i>remoteIP</i>
# on the remote system
startlxde #or whatever desktop is available
</PRE>



ON 20230614@12:07:06 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/idea/minimalcontroller.htm#
James Newton[JMN-EFP-786] edited the page. Difference:
http://techref.massmind.org/techref/diff.asp?url=\Techref\idea\minimalcontroller.htm&version=9



ON 20230619@4:33:29 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/method/ai/strips.htm#45096.6899189815
James Newton[JMN-EFP-786] Says

STRIPS and PDDL planning in general has both good and bad features:<UL>
<LI>The world is black and white; everything that is known is true, and everything else is false. "Billy" must be "At" somewhere and is therefore NOT at every other place. Billy can not be both at his desk and at work. Billy can be at his desk and <i>doing</i> work. 
<LI>The search for a set of actions to a goal state can become very very costly to find, when the initial and goal states are very far apart (not incremental), and there are many possible actions which are incremental rather than major updates. To avoid this, it is critical to remember prior action sets as new single actions, and to train the system with incremental goals. Search optimization can also help; e.g. throwing out paths that seem to be increasing the goal distance, or prioritizing paths that most close the gap. <a href="../a-star.htm">A*</a> or other path planning systems can help. 
<LI>Without typing (which is available in many more modern PDDLs), it's possible for the system to confuse e.g. locations and objects. e.g. At(Billy, Banana) vs Buy(Billy, Banana). 
<LI>Raising detailed sensor data to accurate high level semantic representations is often difficult. In the same way, translating high level action descriptions into low level commands can be error prone. 
</UL>



ON 20230619@4:38:02 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/method/ai/strips.htm#
James Newton[JMN-EFP-786] edited the page. Difference:
http://techref.massmind.org/techref/diff.asp?url=\Techref\method\ai\strips.htm&version=1



ON 20230620@7:07:27 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/language/index.htm#45097.7968402778
James Newton[JMN-EFP-786] See also:
https://citw.dev/tutorial/create-your-own-compiler
How write your own compiler (note this produces &#226;&#8364;&#339;javascript&#226;&#8364;&#157; but that javascript might as well be assembly language for some simple processor)<BR>




ON 20230620@9:19:29 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/1802/index.htm#45097.8885300926
James Newton[JMN-EFP-786] See also:
http://www.decodesystems.com/cosmac/RE-1977-February-CDP1802.gif
Nice block diagram.



ON 20230620@9:21:06 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/1802/index.htm#45097.8896527778
James Newton[JMN-EFP-786] See also:
https://http://www.atarimagazines.com/computeii/issue3/page52.php
Instruction set table



ON 20230629@8:52:14 PM at page:
On a web page you were interested in at:
http://techref.massmind.org/Techref/method/ai/natural_language.htm#45106.8696064815
James Newton[JMN-EFP-786] See also:
https://blog.varunramesh.net/posts/intro-parser-combinators/
Great educational post about classical language parsing.



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