A mathematical model of the road network about emergency rescue is studied on ArcGIS software and Dijkstra algorithm. It provides a shortest path method through the optimization process in Chongqing city. A good Study on city accidents emergency response plan may be established.

The sound barrier is one of the effective and economical engineering facilities to control the urban traffic noise. The characteristics of urban traffic noise are analyzed both in time-domain and frequency-domain. Then the noise reduction theory of sound barrier is introduced in detail. The determination of the influence factors in insertion loss is researched emphatically. The main procedure of the acoustics design of sound barrier is also systematically studied. According to the main design process of the acoustics design of sound barrier, simulation confirmation is conducted by acoustics software to confirm the noise reduction performance of the barrier.

Study of the traffic noise has important role in the improvement of urban living environment. The source of the noise of road vehicle and the spectral features of urban traffic noise are analysed in the paper. Through the investigation and monitoring on two typical roads, the distribution law of traffic noise along both sides of the road is analysed and a theoretical basis for the control of traffic noise is provided.

The accidents such as explosion, leakage, poisoning and fire happened constantly in dangerous goods' transportation. The consequences of the accidents are serious. This article has statistically analyzed 485 transportation accidents of dangerous goods. It shows that the main reason causing dangerous goods accidents is road traffic accidents. The key to ensure the seasonable rescue is effective visual monitor using GPS, modern communication technology, GIS to dangerous goods transport vehicles. So we construct the transportation monitoring system. When the accident inevitably occurs, we propose the rescue mission and response program. Only effective monitoring and timely rescue, can we reduce the rate of accidents and ensure our safety.

The immersed boundary method (IBM) for the simulation of the interaction between fluid and flexible boundaries in combination with the lattice Boltzmann method (LBM) is described. The LBM is used to compute the flow field, the interaction between fluid and flexible boundaries to be treated by the IBM. To analyze the key factors of combination method and implementation process. An example is presented to verify the efficiency and accuracy of the described algorithm. These will provide a base for large scale simulation involving flexible boundaries in the future.