试验将采自5头杜洛克（2～4岁）猪精液（2次/周）冷冻解冻于含有红景天粗多糖中基分（Middle Components of Rhocliola Polysacchoride,MCRP）的稀释液中,应用计算机辅助精子分析系统对猪精子运动特征进行了评价,其它参数用常规精子评...试验将采自5头杜洛克（2～4岁）猪精液（2次/周）冷冻解冻于含有红景天粗多糖中基分（Middle Components of Rhocliola Polysacchoride,MCRP）的稀释液中,应用计算机辅助精子分析系统对猪精子运动特征进行了评价,其它参数用常规精子评价方法进行评估,分析MCRP对猪精子冻后生化指标及活力的影响。结果表明,MCRP在稀释液中的有效浓度范围为4.0～6.0mg/L,当MCRP浓度为6mg/L时,其各项指标均显著高于其它各组（P〈0.05）,而且冷冻解冻后,MCRP添加于稀释液I的精子质量显著优于MCRP添加到稀释液II的精子质量（P〈0.05）。冷冻解冻液中MCRP的浓度与解冻后解冻液中的谷胱甘肽、精子线粒体活性、精子低渗肿胀系数呈显著正相关（P〈0.05）,而与解冻液中的丙二醛浓度呈显著负相关（r=-0.982,P〈0.05）。猪精液冷冻保护液中添加MCRP能够有效地抵抗由于冷冻产生的活性氧自由基对精子的伤害,从而提高精子冻后质量,但是MCRP抑制活性氧自由基的具体成分仍需要进一步的研究。展开更多
提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头...提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头信息和所有节点的相关邻近集合。网络启动后,所有节点根据簇头节点的位置信息划分自己的邻居集合,并从邻居集合中选择剩余能量最大的节点作为下一跳节点。簇头节点推举本簇内部最大剩余能量的节点作为下一轮的簇头节点。实验结果显示,与LEACH(low energy adaptive clustering hierarchy)协议相比较,RNS-MCRP具有更好的能耗均衡特性,提高了网络生命时间。展开更多
The wireless sensor network has a broad application in target tracking and locating, and is especially fit for military detection or guard. By arranging the sensor nodes around the target, this article establishes a t...The wireless sensor network has a broad application in target tracking and locating, and is especially fit for military detection or guard. By arranging the sensor nodes around the target, this article establishes a tracking eluster which can follow the target logically, process data on the target and report to the sink node, thus achieving the tracking function. To improve the security, this article proposes a mobile cluster rekeying protocol （MCRP） to manage the tracking elusterg season key. It is based on a random key predistribution algorithm （RKP） , which is composed of a multi-path reinforcement scheme, a q-composition scheme and a oneway cryptographie hash function.展开更多
文摘试验将采自5头杜洛克（2～4岁）猪精液（2次/周）冷冻解冻于含有红景天粗多糖中基分（Middle Components of Rhocliola Polysacchoride,MCRP）的稀释液中,应用计算机辅助精子分析系统对猪精子运动特征进行了评价,其它参数用常规精子评价方法进行评估,分析MCRP对猪精子冻后生化指标及活力的影响。结果表明,MCRP在稀释液中的有效浓度范围为4.0～6.0mg/L,当MCRP浓度为6mg/L时,其各项指标均显著高于其它各组（P〈0.05）,而且冷冻解冻后,MCRP添加于稀释液I的精子质量显著优于MCRP添加到稀释液II的精子质量（P〈0.05）。冷冻解冻液中MCRP的浓度与解冻后解冻液中的谷胱甘肽、精子线粒体活性、精子低渗肿胀系数呈显著正相关（P〈0.05）,而与解冻液中的丙二醛浓度呈显著负相关（r=-0.982,P〈0.05）。猪精液冷冻保护液中添加MCRP能够有效地抵抗由于冷冻产生的活性氧自由基对精子的伤害,从而提高精子冻后质量,但是MCRP抑制活性氧自由基的具体成分仍需要进一步的研究。
文摘提出了基于相关邻近集合的能耗均衡多跳分簇路由协议(relative neighborhood set based distributed multi-hop clustering routing protocol,RNS-MCRP)。网络初始化阶段,基站计算若干个簇头节点以及所有节点的相关邻近集合,并广播簇头信息和所有节点的相关邻近集合。网络启动后,所有节点根据簇头节点的位置信息划分自己的邻居集合,并从邻居集合中选择剩余能量最大的节点作为下一跳节点。簇头节点推举本簇内部最大剩余能量的节点作为下一轮的簇头节点。实验结果显示,与LEACH(low energy adaptive clustering hierarchy)协议相比较,RNS-MCRP具有更好的能耗均衡特性,提高了网络生命时间。
基金Sponsored by the National Natural Science Foundation of China(Grant No.60473090).
文摘The wireless sensor network has a broad application in target tracking and locating, and is especially fit for military detection or guard. By arranging the sensor nodes around the target, this article establishes a tracking eluster which can follow the target logically, process data on the target and report to the sink node, thus achieving the tracking function. To improve the security, this article proposes a mobile cluster rekeying protocol （MCRP） to manage the tracking elusterg season key. It is based on a random key predistribution algorithm （RKP） , which is composed of a multi-path reinforcement scheme, a q-composition scheme and a oneway cryptographie hash function.
