<正> The strata of Jurassic was divided into three tectonic sequences and eight se- quences of third rank,according to the developing feature of the tectonic in
<正> The distribution of resources is the basis of safety management.Based on thesystematic analysis of a resource distribution system affecting the level of sa
<正> The high speed cameral and schlieren images methods were used to record the photograph of flame propagation process.Meanwhile,the ionization current probes