In  recent  years, as  China’s  rapid  economic  development, the automobile  consumption  has  been  developing rapidly, including the used car distribution industry, which is growing  rapidly at double-digit rates no matter from the number of  transactions, or  the  transaction amount. Data shows that  in the early 21st century, China’s second-hand car circulation industry has stepped into a golden era of high speed and sustainable development. As the development prospects  of  the secondary markets are so widely that many luxury car manufactures are all beginning to sell their own second-hand products, at the same time, as the secondary market may influence the new car market essentially,  it’s becoming much more important for the manufactures to develop a scientific and reasonable pricing strategy and the introduction of new products. Therefore this article try to study the influence of these second-hand car markets make on the auto industries’ dynamic pricing and the new product strategy, and it has important significance.

To optimize the effectiveness of the rehabilitation of underground utilities, taking in consideration limitation of available resources, there is a need for a cost effective and efficient sensing systems capable of providing effective, in real time and in situ, measurement of infrastructural characteristics. To carry out accurate non-destructive condition assessment of buried and above ground infrastructure such as sewers, bridges, pavements and dams, advanced ultra-wideband (UWB) based radar was developed at Louisiana Tech University (LTU). One of the major issues in designing the FCC compliant UWB radar was the contribution of the pipe wall, presence of complex soil types and moderate-to-high moisture levels on penetration depth of the electromagnetic (EM) energy.