counter example
3.For example, counter-current extraction and parallel-current stripping with alternative arrangement can increase mass transfer efficiency for extracting H3 PO4 with Di-n-Butyl Sulfoxide (DBSO) .
5.Certain kind of attacks on some block ciphers may be efficiently resisted by mixing the round keys with a group of frequently changed numbers computed from system time and the counter of data blocks.The general form of such practical schemes has been discussed.Because the changing of certain part of round keys is often much faster than the operations of certain rounds of encryption (or decryption),the efficiencies of this kind of block cipher schemes are quite obvious.In security,as nearly every plaintext data block is encrypted with different keys,and as most attacking techniques have high demands of plaintext/ciphertext pairs,it is difficult for them to work in such a cipher scheme.This may result that a block cipher with time and counter parameters is secure even with cases that the number of round is largely reduced.As an important example of the entire solution,we introduce a cipher scheme TCR6 which has some satisfactory features in both security and efficiency.
7.The most striking example of the loss of a base area was that of the Central Base Area in Kiangsi during the fifth counter-campaign against "encirclement and suppression".
9.Taking the quick-frozen instant export foods as an example,do detail analysis on Japanese Positive List System from view of government,company and CIQ to make effective counter-measures.
