Article View: alt.comp.hello-world
Article #2Re: Complex numbers. Help!
From: Robert Baer
Date: Sun, 21 Jun 1998 00:00
Date: Sun, 21 Jun 1998 00:00
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3451 bytes
Martin Dick wrote:
>
> Hello. I am in need of an explanation of the theory of complex numbers and
> their uses. I have consulted several textbooks tending to this subject but
> they are all far too advanced for my case.
>
> I also need an explanation of how complex numbers relate to fractal images
> as fractals are a useful aid in artificial intelligence decision making.
> This sort of research can allow computers to make decisions of their own by
> relating fractal`s infinite complexity to the organised tree like formation
> of computer databases. This enables _logical_ decision making and
> re-inforces artificial common sense.
>
> Uses of this type of system could include helping the disabled by letting
> the computer perform operations with less strenuous user input and the idea
> of computers making decisions in dangerous situations where humans are too
> slow to think (nuclear power plants, hospitals, etc,) - this could save a
> lot of lives. Thanks.
>
> --
> E-mail:
> torbain@globalnet.co.uk
Start with a good book in electronics covering AC theory.
imaginary
^
| /
| /
| /
|/ angle
-------------------------+--------------------> real
|
|
|
|
First, think of simple cartesian coordinates where a point can be
expressed in terms of distance in X and Y. An alternate way of
describing the same place is in polar coordinates; angle and distance
from reference.
Now think of AC power to a component, and use the voltage as a
reference (reference phase or zero phase). Then let that component be a
capacitor and measure the current thru it; it will be out of phase in
relation to the voltage. Since a capacitor opposes a change in voltage,
the current will "lead" or be ahead of the voltage in phase by 90
degrees (for a perfect capacitor, and most are quite close to this).
So now you see the angle part; the distance is related to the amount
of current.
In electronics, this relationship is expressed as a complex number for
calculation purposes, hence the reference.
The above is like a drop of water; get the book or books and get wet!
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fd9bd,9d39564ac14dccf8 X-Google-Attributes: gidfd9bd,public X-Google-Thread: 112044,9d39564ac14dccf8 X-Google-Attributes: gid112044,public X-Google-Thread: 108c83,9d39564ac14dccf8 X-Google-Attributes: gid108c83,public X-Google-Thread: 10d67e,9d39564ac14dccf8 X-Google-Attributes: gid10d67e,public X-Google-Thread: f42b5,9d39564ac14dccf8 X-Google-Attributes: gidf42b5,public X-Google-Thread: 1077c2,9d39564ac14dccf8 X-Google-Attributes: gid1077c2,public X-Google-Thread: 109f29,9d39564ac14dccf8 X-Google-Attributes: gid109f29,public From: Robert Baer <robertbaer@olywa.net> Subject: Re: Complex numbers. Help! Date: 1998/06/21 Message-ID: <358CBC4C.5B01@olywa.net> X-Deja-AN: 364657893 Content-Transfer-Encoding: 7bit References: <6mh2ip$41b$6@heliodor.xara.net> Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 Reply-To: robertbaer@olywa.net Newsgroups: alt.comp.hello-world,alt.computer,alt.uu.math.misc,aus.computers,aus.computers.logic-prog,aus.mathematics,cern.computing