Introduces the control system of metro regenerative braking energy absorption device,it first proposes a design program using the dual-CPU architecture based on ARM + DSP;and then designs the hardware of ARM board and DSP board;finally designs the electrical control circuit to achieve the disconnection and work of device which is controlled by the control system.

Study on home-made facility for production of potassium sulfate based on Mannheim process and its economic evaluation;

There are 3 problems in potassium sulfate production by Mannheim process:extra high analysis of organic carbon in raw material of KCl; in the byproduct HCl, no red colour appearance upon 1～2 drops of methyl orange in total acidity analysis; excess SO\-4\+ 2 analysis (≥0.

Based on the demands of township enterprises in the province and the local conditions,a two step method of potassium sulfate production was adopted instead of the traditional one step Mannheim furnace method.

Mannheim: Rationality and Irrationality of Social Rebuilding Era;

Between Knowedge,Ideology and Politics:The Profound Analysis about Mannheim Knowledge Sociology

The paper throws light on personal view of teachers and its‘root in sociology on the basis of’ideas decided by social circumstance‘of Mannheim.