为了延长无限传感网的生命周期,提高数据传输的实时性。综合了LEACH和PEGASIS算法的优点,提出了一个新型路由协议算法(Linking of Delamination Based PERASIS and LEACH protocol,LDPBL)。该路由算法采用三层网络结构,从上至下依次为BS...为了延长无限传感网的生命周期,提高数据传输的实时性。综合了LEACH和PEGASIS算法的优点,提出了一个新型路由协议算法(Linking of Delamination Based PERASIS and LEACH protocol,LDPBL)。该路由算法采用三层网络结构,从上至下依次为BS层,簇头层,簇内节点层,其中簇头层与簇内节点层依次成链传输数据。节点信息的传递由上往下,节点数据的流向由下往上。仿真实验结果表明,该算法能够继承LEACH与PERASIS的优点,与此同时摒弃两者缺点,在提高网络生命周期以及提高数据实时性方面有良好的效果。展开更多
为了提高无线传感器网络的生存时间、连通性以及网络中节点的活跃数,提出一种基于改进灰狼优化算法的分区多链无线传感器网络路由协议。该协议采用分区成链的方法,按网络中节点密度分布,以基站为圆心将整个网络空间划分为多个扇形环带区...为了提高无线传感器网络的生存时间、连通性以及网络中节点的活跃数,提出一种基于改进灰狼优化算法的分区多链无线传感器网络路由协议。该协议采用分区成链的方法,按网络中节点密度分布,以基站为圆心将整个网络空间划分为多个扇形环带区域,每个分区内的节点按位置分簇,每个分簇构造一条最优簇内链,同扇区各分簇间的簇头构造一条簇头链,最终通过这条链将采集到的信息朝基站方向传递。在后续迭代过程中,采用改进的灰狼优化算法进行簇头寻优,并根据狼群与猎物的距离以及系数向量对权重进行动态更新。MATLAB仿真表明:改进协议相比PEGASIS(Power-Efficient Gathering in Sensor Information Systems)在避免长链、均衡能耗、延长网络周期等方面均有提升,能有效提高无线传感器网络的性能。展开更多
The combination of pegylated interferon (Peg-IFN) and ribavirin is the standard of care for chronic hepatitis C virus (HCV) infection treatment. In general, common side effects related to this combination therapy are ...The combination of pegylated interferon (Peg-IFN) and ribavirin is the standard of care for chronic hepatitis C virus (HCV) infection treatment. In general, common side effects related to this combination therapy are mild and are very well tolerated. However, peripheral neuropathy including demyelinating polyneuropathy related to Peg-IFN is extremely rare. We present the first case of an acute inflammatory demyelinating polyneuropathy (AIDP) associated with Peg-IFN-α 2a (Pegasys) after 16 wk of a combination therapy with Pegasys and ribavirin in a 65-year-old woman with chronic HCV infection. She developed tingling, numbness, and weakness of her upper and lower extremities and was hospitalized for acute neurological deficits. Her clinical course, neurological findings, an electromyogram (EMG), nerve conductions studies (NCS), muscle biopsy, and a sural nerve biopsy were all consistent with AIDP likely related to Pegasys use. The patient recovered completely with the use of intravenous immunoglobulin (IVIG) including physical therapy and neurological rehabilitation. It is very important that gastroenterologists and/or hepatologists recognize this rare neurological complication related to Peg-IFN treatment very early, since it requires a prompt discontinuation of therapy including an immediate referral to a neurologist for the confirmation of diagnosis, management, and the prevention of long-term neurological deficits.展开更多
文摘为了延长无限传感网的生命周期,提高数据传输的实时性。综合了LEACH和PEGASIS算法的优点,提出了一个新型路由协议算法(Linking of Delamination Based PERASIS and LEACH protocol,LDPBL)。该路由算法采用三层网络结构,从上至下依次为BS层,簇头层,簇内节点层,其中簇头层与簇内节点层依次成链传输数据。节点信息的传递由上往下,节点数据的流向由下往上。仿真实验结果表明,该算法能够继承LEACH与PERASIS的优点,与此同时摒弃两者缺点,在提高网络生命周期以及提高数据实时性方面有良好的效果。
文摘为了提高无线传感器网络的生存时间、连通性以及网络中节点的活跃数,提出一种基于改进灰狼优化算法的分区多链无线传感器网络路由协议。该协议采用分区成链的方法,按网络中节点密度分布,以基站为圆心将整个网络空间划分为多个扇形环带区域,每个分区内的节点按位置分簇,每个分簇构造一条最优簇内链,同扇区各分簇间的簇头构造一条簇头链,最终通过这条链将采集到的信息朝基站方向传递。在后续迭代过程中,采用改进的灰狼优化算法进行簇头寻优,并根据狼群与猎物的距离以及系数向量对权重进行动态更新。MATLAB仿真表明:改进协议相比PEGASIS(Power-Efficient Gathering in Sensor Information Systems)在避免长链、均衡能耗、延长网络周期等方面均有提升,能有效提高无线传感器网络的性能。
文摘The combination of pegylated interferon (Peg-IFN) and ribavirin is the standard of care for chronic hepatitis C virus (HCV) infection treatment. In general, common side effects related to this combination therapy are mild and are very well tolerated. However, peripheral neuropathy including demyelinating polyneuropathy related to Peg-IFN is extremely rare. We present the first case of an acute inflammatory demyelinating polyneuropathy (AIDP) associated with Peg-IFN-α 2a (Pegasys) after 16 wk of a combination therapy with Pegasys and ribavirin in a 65-year-old woman with chronic HCV infection. She developed tingling, numbness, and weakness of her upper and lower extremities and was hospitalized for acute neurological deficits. Her clinical course, neurological findings, an electromyogram (EMG), nerve conductions studies (NCS), muscle biopsy, and a sural nerve biopsy were all consistent with AIDP likely related to Pegasys use. The patient recovered completely with the use of intravenous immunoglobulin (IVIG) including physical therapy and neurological rehabilitation. It is very important that gastroenterologists and/or hepatologists recognize this rare neurological complication related to Peg-IFN treatment very early, since it requires a prompt discontinuation of therapy including an immediate referral to a neurologist for the confirmation of diagnosis, management, and the prevention of long-term neurological deficits.
