At present, network information audit system is almost based on text information filtering, but badness information is embedded into image or image file directly by badness information provider.
目前网络信息审计系统大多基于文本信息的过滤，但不良信息的提供者将不良信息嵌入到图像或直接以图像文件，绕过监控。
E-mail filtering is becoming a research hotspot in network information security area.
电子邮件过滤是网络信息安全研究的热点。
As an important part of data processing and application in the space-based information network, multi-source information fusion plays an important role in the filtering and extractions of information.
多源信息融合作为天基信息网中数据处理和应用的重要组成部分，发挥着信息筛选和提取的重要作用。
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