Based on the concept of load-price elasticity,the principle of marginal cost pricing,and conditions of the deregulated retail electricity market,the model of spot pricing was deduced.

According to this condition, this paper will discuss some nondestructive testing techniques using in the civil engineering in details, including the multisensor data fusion technology, the effect of modeling errors on structure damage identification using artificial neural networks, the load responding technology and the new technology of ultrasonic testing.

A multi-period linear supply function equilibrium model of electricity markets is proposed,with cross-time load demand response and transmission constraints included.

Inter-temporal demand-price elasticity effect is discussed firstly.