4 .
1 . , .
: t .= f (x, y, z, τ)
2. .
q . = f (x, y, z, τ)
3. - .
t , λ .
4. 2- .
λ1 (dt1 / dn). = λ2 (dt2 / dn).
:
.
.
: :
δ, λ,t1, t2. . -
t=f(x) -? ∂t/∂τ = a ▼2t
q-? ∂t/∂τ =0, .. , .. ,
(λ /r)* d2t/dx2=0; dt/dx=1; t=c1x+c2;
1 2. .
. : =0, t=t1, t1= 2 ; =δ,t=t2; t2= 1* δ-t1=> 1=t2-t1 / δ; t= (t2-t1 / δ)*x+t1
t=t2-(t1-t2/δ)*x
, . q = -λ (dt/dx) = -λ*c1= -λ (t2-t1 / δ) => q=λ/δ (t1-t2)
λ/δ (/2 0) . λ/δ - .