Periodicalanalysis showed that abrupt change of sediment load happened in 1968 and 1984, which divided the variation process of river sediment load into three stages.
中国主要河流入海泥沙还具有明显的三个阶段变化特征，即分别在1968年和1984年前后发生了突变。
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Basing on the statistic and analysis of the Chinese technology periodical that have been registered by "the Engineering Index" (EI) from 1996 to 2001, this paper gives some advices how to contribute.
The present condition analysis for Chinese periodical market, the collectivized operation way for the industry of the Chinese periodical and reorganization strategy for industry of periodical assets.