Lin Weimin

Distributed GEP function mining on consistency merger in grid environment

Distributed function mining is an important field of distributed data mining. In order to solve local model merger of function mining in grid environments, this paper presents consistency merger of local function model (CMLFM). On the basis of CMLFM, distributed GEP function mining on consistency merger (DGEPFM-CM) is proposed which combines with grid service. Simulated experiments show that the time-consuming of DGEPFM-CM is less than traditional GEP. With the increasing of grid nodes, the global fitting error of DGEPFM-CM apparently decreases.

Research on substation knowledge semantic exchange model based on ontology

IEC 61850 adopts object-oriented modeling techniques to model business functions of the substation, and defines substation configuration description object model by Substation Configuration description Language (SCL). SCL which is based on XML Schema cannot description the knowledge semantic and achieve substation knowledge exchanging of substation automation system. in this article, knowledge semantic of substation was analyzed and modeled based on ontology technology, including the relationships and constrains of substation knowledge semantic. By extending the label definition of SCL, the semantic exchange model is proposed and description ability of SCL is improved.

Security Audit Based on Dynamic ACCESS CONTROL

The paper proposed a design of security audit based on dynamic access control, which periodically generated rules by mining latest log and applied rules to the packet filtering. Based on matching the content of packet with rules to measure network behavior security, this design generated different mechanism of security access control. Comparing to existing systems which made constant rules to respond to mutative filtering, this design had great applicability and flexibility.