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Re: Re:Re: [sdpd] Re: the XRD pattern in the ICDD logo
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<p>Hi, <br>
<br>
i have got a less brute idea, which may reduce the complexity of searching process to a factor of N^2 !<br>
<br>
The assumptions are still the same:<br>
1. Pattern in the logo was transformed linearly and uniformly.<br>
2. The pattern was from a single phase.<br>
3. The pattern is not an unknown pattern for the searched pdf database.<br>
**in the case that one of these assumptions breaks, all the stuff we discussed now would be unfortunately senseless :-(<br>
<br>
The new criterion of success is quite simple. By observing the 5 strongest peaks<br>
<br>
0.076 79.67<br>
0.127 50.41<br>
0.348 100.00<br>
0.358 44.72<br>
0.606 48.78<br>
<br>
We normalize the angle spacing with the distance between the strongest and the second strongest peak, the peak coordinates of the X column would be -1, -0.81, 0, 0.037, 0.95. Using this new normalized-pattern criterion, after searching the database only one round, hopefully answer, positive or negative, would be disclosed in the next post. Let's wait and see.<br>
<br>
Faithfully<br>
Jun Lu (postdoctor)<br>
----------<br>
Group of YiCheng Wu in Center of Crystal Growth<br>
Technical Institute of Physics and Chemistry<br>
Chinese Academy of Sciences<br>
100190 Beijing, P.R. China<br>
<a href="http://www.instrument.com.cn/ilog/handsomeland/";>http://www.instrument.com.cn/ilog/handsomeland/</a><br>
----- Original Message ----- <br>
<br>
From: Armel Le Bail <br>
To: <a href="mailto:sdpd%40yahoogroups.com";>sdpd...@yahoogroups.com</a> <br>
Sent: Wednesday, May 18, 2011 10:18 PM<br>
Subject: Re:Re: [sdpd] Re: the XRD pattern in the ICDD logo<br>
<br>
>Maybe you can E-Mail ICDD to get the answer. The best way? :-)<br>
<br>
Too simple...<br>
<br>
Armel<br>
<br>
[Non-text portions of this message have been removed]<br>
<br>
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