The diachronic source of redundant negation is traced and its generative mechanism is also researched on.
The generative mechanism of sentences like"Wangmian died father"(王冕死了父亲):Sentence generation by blending in Chinese;
To explain the generative mechanism of low pressure and mass flow self-excited oscillation pulsed jet, the nozzle optimized design range of structure and operation parameters was investigated.
