Therefore,a new cavern detection technique called accumulation energy difference method was proposed,which uses the seismic reflection energy difference in trace or between traces to detect caves.

Comparison has been done between the result of the cross-section electromagnetic topography technique and the data from the borehole,it indicates that the cross-section electromagnetic topography technique is effective in karst cave detection.

Design and development of vulnerabilities detection middleware based on plug-in component;

And a vulnerabilities detection technology based on rough set theory is advanced.

Then,the key technologies, port scanning and vulnerabilities detection are analyzed and illustrated.

Design and Implementation of Vulnerability Detection System;

Executable based vulnerability detection

To cope with the problem of high false positives and false negatives in source code static analysis methods,this paper presents a source code static analysis technology for vulnerability detection based on data fusion.

Then network port sanner and leak detection software are designed and implemented, which can detect and report the leaks existing in network host and provide network manager with security protection measures.

Based on the request and character of hole detection technology,this article establishes a distributing scanning task scheduling model,describes a scanning task distributing algorithm.