This paper investigates the leader-following consensus problem for multi-agent systems with event-triggered mechanism and control packet losses.Based on the local synchronization error, event-triggered mechanisms are ...This paper investigates the leader-following consensus problem for multi-agent systems with event-triggered mechanism and control packet losses.Based on the local synchronization error, event-triggered mechanisms are proposed in order to reduce the number of controller update.The control packet may lose due to unreliability of communication channel.With the assumption that once the packet loss happens the controller will be set to zero,sufficient consensus criteria for multi-agent system with event-triggered mechanism and control packet losses is obtained.It is also shown that the interplay among the allowable packet loss rate,event-triggered mechanism and sampling period.An illustrative example is given to demonstrate the effectiveness of the theoretical results.展开更多
针对目前干粉降失水剂水溶性差,溶胀时间长,稳定性差,影响水泥浆性能的均匀性,不可能以湿混的方式进行施工的问题,通过选择含有磺酸基、酰胺基、烷基、羧基的单体,以过氧化物作引发剂在水溶液中共聚,合成了聚合物DSJ。DSJ具有良好的滤...针对目前干粉降失水剂水溶性差,溶胀时间长,稳定性差,影响水泥浆性能的均匀性,不可能以湿混的方式进行施工的问题,通过选择含有磺酸基、酰胺基、烷基、羧基的单体,以过氧化物作引发剂在水溶液中共聚,合成了聚合物DSJ。DSJ具有良好的滤失控制性能,失水控制稳定(100 mL以下),同时有较好的水溶性,常温自然状态下溶解仅需150 m in;温度适应范围广(常温-120℃),耐盐20%;与各种水泥配伍性好,稠化时间可调,有较高的抗压强度和较高的抗污染能力。在海拉尔探井上应用表明,DSJ在降低运输费用,防油气浸、窜等方面均取得了较好的效果,从而有效地保证了固井质量。展开更多
Starch category products are of low cost and rich in resomees as a kind of drilling fluid additives. The share of starch category products in natural polymer products is more than 20% in U. S. A., but less than 1% in ...Starch category products are of low cost and rich in resomees as a kind of drilling fluid additives. The share of starch category products in natural polymer products is more than 20% in U. S. A., but less than 1% in China. Based on introduction of the varieties, the performance properties and the production technology of starch category products, the reason for its lesser adoption is analyzed, and the way to solve the problem is presented.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos.61573156,61733008,and 61503142the Natural Science Foundation of Guangdong Province under Grant No.2017A030313332the Fundamental Research Funds for the Central Universities under Grant Nos.x2zdD 2153620 and x2zdD 2173280
文摘This paper investigates the leader-following consensus problem for multi-agent systems with event-triggered mechanism and control packet losses.Based on the local synchronization error, event-triggered mechanisms are proposed in order to reduce the number of controller update.The control packet may lose due to unreliability of communication channel.With the assumption that once the packet loss happens the controller will be set to zero,sufficient consensus criteria for multi-agent system with event-triggered mechanism and control packet losses is obtained.It is also shown that the interplay among the allowable packet loss rate,event-triggered mechanism and sampling period.An illustrative example is given to demonstrate the effectiveness of the theoretical results.
文摘针对目前干粉降失水剂水溶性差,溶胀时间长,稳定性差,影响水泥浆性能的均匀性,不可能以湿混的方式进行施工的问题,通过选择含有磺酸基、酰胺基、烷基、羧基的单体,以过氧化物作引发剂在水溶液中共聚,合成了聚合物DSJ。DSJ具有良好的滤失控制性能,失水控制稳定(100 mL以下),同时有较好的水溶性,常温自然状态下溶解仅需150 m in;温度适应范围广(常温-120℃),耐盐20%;与各种水泥配伍性好,稠化时间可调,有较高的抗压强度和较高的抗污染能力。在海拉尔探井上应用表明,DSJ在降低运输费用,防油气浸、窜等方面均取得了较好的效果,从而有效地保证了固井质量。
文摘Starch category products are of low cost and rich in resomees as a kind of drilling fluid additives. The share of starch category products in natural polymer products is more than 20% in U. S. A., but less than 1% in China. Based on introduction of the varieties, the performance properties and the production technology of starch category products, the reason for its lesser adoption is analyzed, and the way to solve the problem is presented.
