This paper mainly divides into three parts: the first part is about the focused crawling, then the second part is to identify the deep web entries, finally is to utilize the domain ontology to judge the relevance of the deep web entries about the subject, following, illustrating how to use these three parts to construct an online domain-specific deep web entry crawling system.

Effects of Nozzle Submerged Depth on Flow and Temperature Field of Molten Steel in Mold;

In terms of the trapezoidal nozzle of the continuous casting mold with a cross-section of 1235×200 in the 2nd steel making plant of TISCO, the dependence of molten steel flowing in mould on the nozzle depth of submersion at various casting speeds was investigated in this paper, and the optimized nozzle depth of submersion was proposed.

, the invasion depth of mud filtrate is calculated, which established the ground for the calculation of th.

Basing on the mathematical model of predicating the drilling fluid concentration near the wellbore area according to the radical distance changes, and by the way of numerical integration, drilling fluid invasion depth and formation damage degree can then be determined.