前言当今社会是信息高速发展时代,信息的传播速度与传播质量不仅是企业的生存与竞争能力的体现,也是人类不断提升自我防护能力的重要手段,如气象信息的传播等。在信息的特性中,最重要的就是信息的时效性与可传递性。信息的时效性是信息的重要特征,是指信息从发出、接收到进入利用的时间间隔及其效率。信息 Preface Today’s society is an era of rapid development of information. The speed of information dissemination and the quality of communication are not only an expression of the survival and competitiveness of enterprises, but also an important means by which mankind continuously enhances its self-protection capability, such as dissemination of weather information. Among the characteristics of information, the most important is the timeliness and transitivity of information. Timeliness of information is an important feature of information, refers to the information from the issue, received into the use of the time interval and its efficiency. information