聚羧酸系超塑化剂的合成及性能研究

以自制的大分子单体聚乙二醇(PEG,聚合度n=23,35,45)不饱和羧酸单酯(聚乙二醇顺丁烯二酸单酯和聚乙二醇丙烯酸单酯)及其它烯类单体为原料,过硫酸铵为引发剂,经共聚合反应得到了聚羧酸共聚物。研究了大分子单体种类和侧链长度对共聚物分散性、分散稳定性的影响。实验结果表明所合成的聚羧酸共聚物对水泥净浆具有优异的超分散性,在水灰比0.29及掺量0.3%时,水泥净浆流动度可达230 mm。     

Intrusion response goals and corresponding strategies

The effects of strategy on the network security defense and the related research on intrusion response strategy are briefly presented,with the focus on the status and function of intrusion response strategy in the intrusion response decision-making.Some specific response strategies for specific response goals are presented as well.The relevant knowledge of the planning,and a classification of response tasks are proposed.The intrusion response planning methods and models based on hierarchical task network(HTN) are described in detail.On this basis,the model of combining the response measure decision-making with the response time decision-making is expounded.The proposed model can integrate response strategy into response decision-making mechanism.In addition,the results of the intrusion response experiments are provided to verify the ability of using different response strategies to achieve different response goals.At last,the application needs of response strategy in network security are analyzed,and the approaches of the response strategy applied in intrusion response system are summarized.