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储备仓库管理系统_外文翻译(范文).doc
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储备仓库管理系统_外文翻译(范文)
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外文资料原文:
Computer information retrieval
Computer information retrieval, in essence, will be entered into by a
computer search strategy and system of documents stored characteristics
of the logic of group identity and its analogy with the relationship, the
process of matching. As the information needs of their own uncertainty,
in addition to the literature on the characteristics of the database ID can
not be fully aware of, as well as the system of certain restrictions, in
varying degrees will affect the search results. But as long as the search
follow certain steps to develop a good search strategy, we can reduce the
impact of various negative factors, as much as possible so that questions
identity and information retrieval and retrieval system needs to maintain a
good consistency, which searches in the system to meet letter of demand.
1. Search steps
(1) identify information needs, a clear purpose search
Information needs is an objective or subjective information on a
variety of needs. This demand information is obtained from the starting
point, information retrieval is the selection of online databases, search
strategy and evaluation to determine the effect of the basis for retrieval.
Different types of issues, information needs of its scope and extent are
not the same. For example, applications for invention, to declare the
results of incentives, identification and investigation established a new
topic category, often the need for a comprehensive collection of literature
on a particular theme over the scope of information, such topics have a
census, retrospective features, should focus on the recall; and for
scientific research , production in order to solve the problem of a
particular research topic is often only found information for their research
help, but do not need to find a wide range of literature. Therefore, these
issues require accurate.
How to correct the information needs of the analysis of it? Information
needs may be from the form and content analysis of two aspects. The
form of relevant information needs to issue clear:
clearly the purpose of retrieval. Search results for declare, or
in order to understand the latest developments in disciplines,
etc., thus to develop in line with the recall or the precision of
the search strategy requirements.
clear volume needed for literature. Documents required for
the maximum number of search strategy determined at a later
stage and control the cost of retrieval is a very important
parameter; At the same time also the subject of the search may
have to estimate the volume of related literature.
clear documentation required for the language, age range,
type, author or other appearance characteristics, which limit
the scope of retrieval is also very important.
With regard to the content of information needs to clear the main
problems are:
Search topics clearly related to the scope of the main subjects,
after which select the appropriate database is very important.
Analysis of the main contents of the subject search using
natural language to express these requirements, it is the more
important online link.
(2) Select database to search means to determine
After an analysis of information needs can be made under conditions
known to choose the right database, this step implied the choice of the
retrieval system. For foreign patent document retrieval, you can search
BDSIRS domestic GWZL library system. But its way to the retrieval of
patent documents and reports up-to-date as in the United States regard the
WPI library DIALOG system, when the search request is high, the United
States is still often chosen DIALOG system.
Select the database, first of all should be aware of:
databases involved in the information fields;
types included in the literature, it is best to learn more about
the main source of literature;
included the time frame;
the basic index database and the auxiliary index, which means
the provision of search and retrieval features of the logo;
database retrieval costs, including fees and each machine
records the time of the printing costs.
Selected database, the way its search also identified, and the basis of
known conditions to determine one or several search channels. Due to
computer storage capacity and computing speed, and contrast with more
established field index, not only seized from the hands of the MeSH
commonly used, such as words and the author means to retrieve, but also
from the title, abstracts of freedom words, the type of literature,
periodicals and other ways to retrieve the name, and also the use of
various channels of the group with cross-searching, these are beyond the
manual search.
(3) to determine the concept of the subject group and retrieval of facial
identity
Identify information needs, understanding the search after the main
contents of the subject, to determine their face and retrieval of the
concept of group identity is an important step. When search topics
include the subject of more complex content, the composition should be a
clear concept of the subjects of several groups face, and through the logic
of a certain group with the formation of a complex relationship between
the concept or concepts to express the user's information needs.
Identified the concept of group of subjects face, but also the concept of
group will be converted into the corresponding surface for the system to
identify the logo of the search, retrieval, said the logo should be in
accordance with the requirements of both sides, first off the mark, that is
reflected in the information retrieval needs identification; b is a matching,
that is, retrieval of logo storage and retrieval system identification
consistent characteristics.
Search the following three types of identification in general form:
norms words: to be seized from the database or Thesaurus
Thesaurus select standardized word or phrase, as the word
table is a database indexing and retrieval must be guided by
the use of a common search language. Question in order to
retrieve the characteristics of identity and identification
documents in line, get the best search results, preference
should be given to the word norms.
standardized code: the code is a database system index for
some the concept of the subject area or theme unit provides an
index. Such unit refers specifically to a very good, and is a
better search feature of the effect of identification documents.
Words such as international patent IC =, PTS database product
code PC =, standard industrial code SC = and so on.
free speech: the use of freedom of speech retrieval systems to
take full advantage of the full text search function. Regulate
the choice of the word or code word need to use or
classification of natural language, etc. to standardize the
language of conversion, and indexing and retrieval of the idea
of staff will also affect the search when inconsistent results. At
this point, a free word in the title, abstracts or full text search
will certainly reveal the superiority of free speech direct and
concise scientific and technical personnel is easy to accept, the
more commonly used methods.
the development of retrieval-type questions to determine the specific
procedures to find
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