C. Experiment Measurement and Analysis
The information of China International Shipping
Network (http: //www.shippingchina.com/) is chosen as
an experimental data source. As the information amount
in the data source is too large, so 2000 web pages related
to “port” are chosen as the validate data set.
In this experiment, rough ontology based Semantic
information retrieval is compared with precise ontology
based semantic information retrieval and keyword based
syntax information retrieval based on the chosen data set.
Based on the consistency of comparison conditions, a
user should input the same keyword in these different
systems. But, within the acceptable retrieval time range,