信息检索练习题（Information retrieval exercises）.docVIP

信息检索练习题（Information retrieval exercises） Ask students to do homework with lab paper. I. The use of CBMdisc Access database system: 1, double-click the desktop shortcut cbmWin2004, click the left key on the window that appears, enter the CBM database, click the start button at the bottom right of the window, and enter the database retrieval system. Problem one: MRI diagnostic evaluation of liver cancer 1. The subject headings of liver tumors were retrieved (1) click the enter subject word, subject word retrieval approach, first use the mouse in the input window and click, and then enter the cancer, and then press enter or browse the back window with the mouse click, enter the Thesaurus: see liver cancer liver cancer. (2) click on the subject notes on the right side of the window, and enter the subject note list. In the search options bar, select not expand, and then click search to appear the sub keyword window. Select all the sub headings, click add, and then click the confirmation key at the bottom of the window. The screen shows the retrieval results, and the subject word search of liver tumor is completed. (3) repeat the steps above, but in the right side of the window click mesh annotations button, in the search menu, select all the expansion tree, and then click search, compare these two different search results, why? 2, carries on the MRI key word retrieval. Click the search button, enter MRI by default, then press enter, or click the key behind the window. The screen displays the search results and completes the retrieval of the word in the form of a free word. Then the display of search results, find out from the subject field subject words corresponding to the magnetic resonance imaging, cut back to the search screen, then point the topic words, input magnetic resonance imaging, and then click enter, the theme of the word annotation - retrieval - all subheadings - add, confirm, complete the key words magnetic resonance imaging retrieval. 3, the logical retr