Discussion and studys on destroyed categories and design target of hard-soft composite pavment;

To introduce the application effect of emissive flame nozzle on muffle,the structure characteristics of muffle,main design targets and real targets of production

Based on the problems existing in the design of measuring middle upper class directors performance, this paper emphasizes the importance of the idea of performance measurement in indicator design and illustrates indicator design in balanced score card and gives some advice on how to improve the design of measuring middle upper class directors performance in our country.

Through the analysis of semi-rigid base pavement structure for expressway and the application of design concept for perpetual pavement abroad, mechanical design indexes for the composite base perpetual asphalt pavement structure are proposed.

Types of airport asphalt pavement structure,damage pattern,development trend of pavement design method are detailed as well as design indexes choosing,and new large aircraft oriented airport asphalt pavement design method and indexes are discussed,and Results show that fatigue crack,rut and low temperature crack are major damage patterns for pavement structure design.

By analyzing the current design indexes, It indicate the problemsin application of curved sinking indexes, the introduction for two new design indexes being introduced and the new way using multi- design- indexes in our pavement structure design are all significant forthe improvement of rationality in pavement structure design.

shear cracking in subgrade combination,tensile cracking in pavement interface,bottom-up tensile cracking in widening pavement and top-down tensile cracking in existing one,and then the correspond design philosophy,design criteria and the method of treatments selection are proposed according to the principle of differential deformation.

A rerview of the design criteria of asphalt pavements adopted in Specifications since 1958 is provided in this pape