van operation
1.In this paper, the development tendency and technology features of EDI are discussed from technology, operation to standards. Some popular EDI software based on VAN mode or Internet mode is introduced. Finally, we suggest which should be considered to build up an EDI center.
2.In an accident of operation of JJ-2 electron Van de Graff accelerator, anoteworthy phenomenon was found, i. e., when the accelerator was shut downand its high vacuum pump was withdrew, a phenomenon was found that theradiation field in great strength was appear under the window of electron outletand its surroundings.
