According to the calculation principle of low-voltage power supply system,the paper analyzes the problems occurred during the calculation in low-voltage power supply design and puts forward to use the advantages of using new equipment and new technology,which solves the difficulties in power supply design.

Based on a discussion of some key problems in structural design,such as the constitutive relationship,element model,crack model,material strength,and load determination,the calculation principle,which should be followed in hydraul.

According to the calculation principle of low-voltage power supply system, the paper analyzes the problems occurred during the calculation in low-voltage power supply design and puts forward to use the advantages of using new equipment and new technology, which solves the difficulties in power supply design.

Thinking of computing regulation of engineering quantity;

This paper discusses the calculation rules of the horizontal damp proof course in wall body, the mark size and construction size, the calculation length in wall foundation, the all-round foundation of the roof-beamless, the rectangular foundation, the cup-like foundation etc.

According to the wide application of the valuation of the bill of quantities,it compares the valuation of the bill of quantities and quota valuation from counts and measurement,points out that their making procedure and cost constitution is almost the same,and compares the main calculation rules of different programs from architectural project and decoration design.