According to the data from the hydraulic model of E Gongyan bridge,analysis of the navigation clearance,effects on water condition of downbound & upbound and channel dimensions,we draw the conclusions that the building of the bridge has effects on sailing and that the location and pattem of E Gongyan bridge are reasonable.

The relationship between navigation clearance and design vessel colli- sion force of highway bridges is analyzed.

Database security in air transportation information system;

This paper introduces the current situation of transportation market in our country on the whole market scale and development level,and analyzes the current situation and problems concretely from four aspects:railway transportation,highway transportation,waterway transportation and air transportation,and suggests transportation market reform strategy.

This paper studies the problem of synchronized scheduling of production and air transportation in supply chain.

Analysing method of customer segmentation and customer value of air cargo;

Analyzation and Optimization on the Process of International Air Cargo;

Customer Value Study Based on Data Mining in China s Air Cargo Industry;