This paper analyzes on the factors influencing the development of the household central air conditioner,introduces in detail the forms and features of each kind of household central air conditioner,and puts forward the design procedures of the household central air conditioner system.

The design principles and the selection of design parameters are introduced,and a simple explanation about the nail design procedure is also presented by an engineering example.

take the overall wire sheaves design of Dove brand electro-bike,the paper discussed the relation between the cross section value of the wire and the running time in accordance with design specification, design procedure (based on the test value

0, what is more, a complete set of design process of microstrip patch rectenna was brought forwar.

Combined with engineering ex- ample,describes the design steps,calculates theoretical outlet temperatures using differ- ent evaporative cooling air-conditioning units in different areas.

This paper introduces the features of the data warehouse, and through the analysis on the military farm information data, expounds the implementation modes and design procedures of the military farm information data warehouse decision system.