TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - XIA Tian1,2 T1 - Deep directional collection of Web data Y1 - JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 34 EP - 38 VL - 46 IS - 5 UR - http://lxbwk.njournal.sdu.edu.cn N1 - ER -