While stressing public risk analysis, the paper introduces vulnerability analysis and puts forward risk information sharing mechanism and communication mechanism in order to explore a set of research methods of dangerous chemicals logistics public risk management system.

The grid vulnerability analysis is important to fault prevention and system operational security.

Network security leak scan and vulnerability analysis are the base of system security evaluation and the essential components of Information security system.

Cause study and countermeasures for core rod brittle fracture of suspension composite insulators on 220kV Ping-He line;

From the view of brittle fracture of aluminum buckles during bending,the cause of formation of brittle fracture was analyzed.

Through analyzing and studying microstructure,chemical composition,fracture appearance,inclusion appearance,surface quality and drawing process of 82B wire rod of brittle fracture during drawing,breaking causes are pointed.

Through the failure analysis of the top die block of the cold extruding die for stainless steel wires, with 7Cr7Mo3V2Si steel and deep cold treatment to stress the match of hardness-malleability and wearability, the early fracture problem of the die was solved and the service life of the die has greatly prolonged.

Based on the fracture of loco axle made by EA4T steel,the composition,mechanical property,fracture feature and microstructure of the axle have been investigated;The influence of metallurgical quality on the properties of the axle also have been discussed.

Hard coil rod structural determines hard coil rod's technological functions,set up a claim to the regular,fine and high content sorbite for hard coil rod is used for drawing or draw failure and brittle failure will happen.

To analyze brittle failure of 70#,65# series high carbon wire rod during wire drawing.