Under simulated exhaust conditions,the catalytic activity is evaluated by using the light-off temperature(the temperature of 50% conversion simplified as T_(50)) and the temperature of 90% conversion(T_(90)) for the three pollutants CO、HC and NO_x.

La_(1-x)Ce_xFe_(1-y-n)Co_yRu_nO_3 were prepared by the sol-gel method to study the catalytic activity and evaluated by using the light-off temperature (the temperature of 50% conversion simplified as T_(50)) and the temperature of 90% conversion (T_(90)) under simulated exhaust conditions for the three pollutants CO? HC and NO_X.

The results showed that the catalysts containing Ce xZr 1-xO 2 solid solutions have higher conversion as well as lower light-off temperature compared with that containing pure CeO 2.

Influence of Ce rare-earth on ignition temperature of magnesium alloy;

1,the catalyst had the best catalytic activity whose onset ignition temperature was 325 ℃.

The catalyst contained in such device should lower down soot ignition temperature to the values characteristic of diesel exhaust (180～350 ℃).

This paper proposes that the initial temperature T i of gear is rising gradually during laser scanning tooth by tooth.

The impact of the initial temperature on the measurement results was also discussed.

In contrast to typical thermosyphon,thermosyphon filled with a nano-particle suspension had adversely high boiling incipience temperature,temperature excursion,and thermal resistance.

For example,according to the range analysis and variance analysis,the sensitive factors to the onset temperature at the hot end of the first stage stack were the charging pressure,the heating power of the traveling-wave stage and the heating power of the standing-wave stage in sequence.

A miniature thermoacoustic prime mover was built up,and the experiments had been done to observe the influence of structural and operating parameters on the sound amplitude,resonance frequency and onset temperature of the system.