This paper lists a large number of overtone scales and musical scores scattering in the various regions of the world to prove the significance of the original scale of instrumental overtones and its meaning to the birth of a specific interval,and proposes that natural harmonics is a seamless natural temperamentology.

Foreland thrust-fold belt features and gas accumulation in Midwest China;

The energy conversion and utilization process of natural gas reforming technology system are analyzed from the point of view of exergy balance,the different exergy income,exergy expenditure and exergy efficiency are calculated,and the optimization direction of operation parameter of natural gas reforming technology system is put forward.

The technology of transition gas sources for natural gas conversion,including natural gas reforming gas,mixture of natural gas and coal gas with low calorific value and natural gas-air mixture,are introduced.

The necessity of natural gas reforming in Shanghai City is analyzed, and the technological process of converting from heavy oil to natural gas for manufacturing gas and the renovation of former equipment are described.