Information Technology Reference
In-Depth Information
H o z ( x
H o z ( x
H o y ,we
For the normalized anomalous magnetic field,
,
y )
=
,
y )
/
obtain
H o z ( x
H o z ( x o ,
,
y )
+
K ( x
,
y
,
x o ,
y o )
y o ) dx o dy o =
W zy ( x
,
y )
,
(5
.
73)
−∞
−∞
where
W zx ( x
,
y )
1
K ( x
,
y
,
x o ,
y o )
=
( x
2
π
x
x o ) 2
+
( y
y o ) 2
,
W zy ( x
y )
1
+
( x
2
π
y
x o ) 2
+
( y
y o ) 2
( x o
x ) W zx ( x
,
y )
+
( y o
y ) W zy ( x
,
y )
+
.
2
π
[( x
x o ) 2
+
( y
y o ) 2 ] 3 / 2
With x o +
y o
→∞
, the kernel K ( x
,
y
,
x o ,
y o ) decreases sufficiently fast, and
H o z ( x o ,
this allows us to integrate
y o ) within relatively sm all area. Note also that
y o ) has a singularity at ( x
K ( x
0. So, in the vicinity
of this point, the integral should be taken as its principal value in the Cauchy sense.
Here we have to take into account that
,
y
,
x o ,
x o ) 2
+
( y
y o ) 2
K ( x
,
y
,
x o ,
y o ) dx 0 dy 0
−∞
−∞
W zx ( x
,
y )
1
=−
( x
y o ) 2 dx o dy o
2
π
x o
x o ) 2
+
( y
−∞
−∞
W zy ( x
,
y )
1
( x
y o ) 2 dx o dy o =
0
.
2
π
y o
x o ) 2
+
( y
−∞
−∞
Using this property of K ( x
,
y
,
x o ,
y o ), we rewrite integral equation (5.73) in the
form
H o z ( x
H o z ( x o ,
H o z ( x
,
y )
+
K ( x
,
y
,
x o ,
y o )[
y o )
,
y )] dx o dy o =
W zy ( x
,
y )
.
−∞
−∞
(5
.
74)
It is simply evident now that the singularity is o f little importance, since
H o z ( x o ,
0as ( x
H o z ( x
,
x o ) 2
+
y o ) 2
y o )
y )
( y
0.
Search WWH ::




Custom Search