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我们在信息处理过程中,总要对浩如烟海的数据和资料作出选择,这些选择在信息论中称为滤波。一个有效的信息系统,必须做到滤波尽量合理,以免出现因滤波失误而失去有效信息和引进无用噪音。一般说来,一条信息从采集、加工到决策者把有用信息接收下来并作出反应的过程,就是对信息进行三级滤波的过程。第一级,选择性滤波。本级滤波大多在基层信息采集者的信息处理过程中进行。其目的是为了提高信息的准确性与适用性。基层信息工作者,通过不同的信息渠道,可搜集、获取大量的初级信息。对原始的信息资料进行去粗取精、去伪存真、汇同分异。加工提炼的过程,就是选择性滤波的过程。具体步骤是五查:(一)查需求。即根据所收集的信息与所想了解的
In the process of information processing, we always make a choice of voluminous data and information. These choices are called filtering in information theory. An effective information system, filter must be made as reasonable as possible, in order to avoid loss of useful information due to filtering errors and the introduction of useless noise. In general, a process of collecting and processing information from a collection of information to receive decision-makers’ useful information and reacting to them is a process of filtering information in three levels. The first level, selective filtering. The filtering of this level is mostly carried out in the process of information processing at the grass-roots information collectors. Its purpose is to improve the accuracy and applicability of the information. Grass-roots information workers, through different channels of information, can collect and obtain a large amount of primary information. To the original information and data to crude and refined, to pseudo-true, together with the separation. Processing refining process, is the selective filtering process. The specific steps are five check: (a) check the demand. That is based on the information collected and what you want to know