替代加密:
A B C D E F G H I J K L M N O P Q R S T U V W 密文
Y Z D M R N H X J L I O Q U W A C B E G F K P 明文
X Y Z
T S V
I HAVE A DREAM！#
密文？？
用ARM編程實現替代加密。
A semantic session analysis method partitioning Web usage logs is presented．Semantic W eb usage log preparation model enhances usage logs with semantic．The M arkov chain
mode1 based on ontology semantic measurement is used to identi．
ing which active session a request should belong to．The corn—
petitive method is applied to determine the end of the sessions．
Compared with other algorithms，more successfu1 sessions are additionally detected by semantic outlier analysis．
