Master the basic requirements of patent search, the error is (BE).
A. The basic requirements for patent search are complete, accurate, fast and flexible
B. Recall rate is often used to measure the accuracy of search results
C .Recall rate and precision rate are commonly used to measure the effectiveness of patent search
D. The "spirit" of patent search refers to the flexible use of various search elements and search strategies
E. Precision rate is often used to measure the comprehensiveness of search results
Analysis:
Item A, the basic requirements for patent search are complete, accurate, fast and flexible. "Complete" means no For omissions, "accurate" means targeted, and "quick" means short-term. Item B, recall rate is often used to measure the ability of the retrieval system and searchers to detect relevant information. Item C. In practice, recall rate and precision rate are often used to measure the effectiveness of patent searches. Item D, "Spirit" refers to the flexible use of various search elements and search strategies. Item E, precision rate is often used to measure the ability of the retrieval system and the searcher to reject irrelevant information.
There are three ways to search for patents: paper search, software search and online search.
Before computers were widely used in the field of information retrieval, and before networking provided the possibility to maximize information sharing, the main methods for patent retrieval were paper retrieval and software retrieval.
Paper carrier is the main form of patent documents and the main object of retrieval. Paper retrieval is generally the least error-prone and the most effective evidence, but it is inefficient in the patent retrieval process. It is time-consuming and labor-intensive, easy to be lost and damaged, and due to the long printing and distribution cycle, it is difficult to retrieve the latest information.
Software searches usually include microfilm, computer magnetic media and optical disk patent document searches. Microfilm-type patent documents have developed rapidly due to their advantages such as small space, high storage density, long storage life, and easy copying. Magnetic media has become one of the main means of storing the full text of patents. Magnetic media mainly includes tapes and disks. They have the advantages of high storage density, small size, free loading and unloading, and long-term storage, so they are widely used.
When digital storage technology brought CD-ROMs into the field of document collection, various forms of patent database CD-ROMs came into being. As a newly emerging medium, optical discs are called "future patent document carriers". With the development and popularization of computer technology, CD-ROM databases have played an important role in patent retrieval and acquisition of patent full text. Although CD retrieval is faster, the limited enjoyment of CD retrieval limits its scope of use, and the update speed also has certain limitations.
With the development of network technology, online patent resources are favored by users for their unparalleled data advantages, convenient and fast retrieval, and are not limited by time and space, and have become the main method of patent retrieval.
Online patent search has gradually developed and matured, and now online patent search will become the most important and fastest search method. Online retrieval is fast and the content is new, but it does not have legal effect. If it is to be used as evidence, the relevant departments need to provide corresponding certificates, or download and certify it through a legally recognized department to have legal effect.