[1]}张旭.
半线性分布参数系统的精确能控性. 北京: 高等教育出版社, 2004

\REF{
[2]}Isakov V.
Inverse Problems for Partial Differential Equations. Berlin:
Springer-Verlag, 1998

\REF{
[3]}Li X J, Yong J M.
Optimal Control Theory for Infinite Dimensional Systems.
Boston: Birkh\"auser,  1995

\REF{
[4]}Escauriaza L, Seregin G, \u{S}ver\'{a}k V.
Backward uniqueness for parabolic equations. Arch Rational
Mech Anal, 2003, {\bf 169}: 147--157

\REF{
[5]}Isakov V.
Carleman type estimates in an anisotropic case and applications.
 J Differential Equations, 1993, {\bf 105}: 217--238

\REF{
[6]} Quintanilla R.
Uniqueness in exterior domains for the generalized heat conduction.
Appl Math Lett, 2002, {\bf 15}: 473--479

\REF{
[7]}Limaco J, Medeiros L A, Zuazua E.
Existence, uniqueness and controllability for parabolic equations
in non-cylindrical domains. Matem\'{a}tica
Contemporanea, 2002, {\bf 23}: 49--70

\REF{
[8]}Zhang X.
Unique continuation for stochastic parabolic equations.
Diff Int Eqs, 已接收.

\REF{
[9]}Duvaut G.
M\'{e}canique des Milieux Continus. Paris: Masson, 1990