The modes of flexible grid-connection,running in ready state and fault ride through were established,cuttin.

Aiming at improving the existing flotation technology of a large-scale scheelite mine located in Jiangxi Province,this paper puts forward an advanced technological process,which separates copper and sulfide in the first stage,then rough selection of scheelite and finally the fine-beneficiation of scheelite by applying heating stirring of non-removal reagent.

One is non-desliming craft but to use the depressing reagent to depress the mire and control the trend of mire.

After describing the importance of grounding design in electronic equipment,a design method of un-emersion grounding poles using in airborne equipment is introduced in this paper.