共查询到19条相似文献,搜索用时 62 毫秒
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基于QPSO的模糊C均值聚类算法 总被引:2,自引:3,他引:2
针对模糊C均值(FCM)聚类算法存在的缺点,利用量子粒子群优化(QPSO)算法的全局搜索能力,提出了一种新的聚类算法——基于量子粒子群优化的FCM聚类算法(QPSOFCM).QPSOFCM算法先对随机初始点利用QPSO进行优化,然后利用产生的中心点进行聚类,重复上述两步操作直至结果满意为止.新算法可以降低FCM算法对初始点的敏感度,一定程度上避免了FCM算法易陷入局部极优的缺陷.几组数据实验结果表明,与FCM和PSOFCM算法相比,提出的QPSOFCM算法聚类结果更可靠. 相似文献
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提出一种基于模糊C均值的分簇[1]算法。算法采用经典的模糊C均值聚类技术,对整个传感器区域进行划分;并根据每个节点属于该簇的隶属度来判定节点当选为簇头节点的概率,这样在簇边缘节点也就是隶属度低的节点当选簇头节点的概率就会较低,从而使整个网络能耗负载均衡。在簇的划分中,引入了最优簇头数的概念。该方法有效地解决了簇头分布不均带来的簇头之间距离过近、大片区域没有簇头以及边缘节点能量损失过快的问题。 相似文献
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针对无线传感器网络中分簇路由算法中存在的“热区”问题,提出了一种基于虚拟区域划分的非均衡簇路由算法。算法将簇划分的任务交由能量无限制的汇聚节点完成,使得靠近汇聚节点的内层簇的规模小于外层簇的规模。在簇的结构中引入了主、从簇头节点,从而实现了分布式簇头选举工作,同时在分簇过程中避免了每个阶段的能量消耗。将ARMA预测模型引入到主簇头节点的更换过程中,从而避免了主簇头因为能量完全消耗而死亡,也避免了因为主簇头死亡而造成网络分割,降低网络的生存时间,利用NS2.31仿真平台对基于虚拟区域划分的非均衡簇路由算法进行了仿真验证,结果表明与传统路由算法相比,该算法延长了WSN的生存时间,有效提高了WSN网络健壮度。 相似文献
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将群智能优化算法引入无线传感器网络分簇路由协议的设计能有效地节约节点能量和提高分簇效率.针对基本人工鱼群算法在运算速度方面的不足,提出了一种基于动态人工鱼群优化的无线传感器网络分簇算法,算法为了同时具有较好的全局搜索和局部寻优能力,更快地得到最优分簇结果,在一次迭代进化中除了考虑人工鱼的觅食行为、聚群行为和追尾行为的寻... 相似文献
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为了解决铁路监测场景中线性无线传感器网络的节点间能耗不均衡导致的网络生命周期短、数据传输时延大的问题,提出了一种基于粒子群优化理论和广度优先搜索的路由算法。以候选簇头节点的相对能耗、簇头间距和簇头负载为指标构建适应度函数,通过调整惯性权重系数增强粒子群算法局部搜索能力,获得簇头最优解集;构建能耗与时延驱动的路径成本函数,基于广度优先搜索获得源节点到sink节点的最优主路径;设计基于Markov决策过程(MDP)模型的Q-learning备选路径更新与路由维护机制。仿真结果表明,所提算法能够有效均衡节点间能耗,在延长网络生命周期和降低数据传输时延方面具有较优的性能。 相似文献
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Aiming at the problem that the location distribution of cluster head nodes filtered by wireless sensor network clustering routing protocol was unbalanced and the data transmission path of forwarding nodes was unreasonable,which would increase the energy consumption of nodes and shorten the network life cycle,a clustering routing protocol based on improved particle swarm optimization algorithm was proposed.In the process of cluster head election,a new fitness function was established by defining the energy factor and position equalization factor of the node,the better candidate cluster head node was evaluated and selected,the position update speed of the candidate cluster head nodes was adjusted by the optimized update learning factor,the local search and speeded up the convergence of the global search was expanded.According to the distance between the forwarding node and the base station,the single-hop or multi-hop transmission mode was adopted,and a multi-hop method was designed based on the minimum spanning tree to select an optimal multi-hop path for the data transmission of the forwarding node.Simulation results show that the clustering routing protocol based on improved particle swarm optimization algorithm can elect cluster head nodes and forwarding nodes with more balanced energy and location,which shortened the communication distance of the network.The energy consumption of nodes is lower and more balanced,effectively extending the network life cycle. 相似文献
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针对模糊C-均值聚类算法容易陷入局部极值等缺陷,提出了基于改进QPSO的模糊C-均值聚类,算法利用QPSO的优点,并对量子门更新策略进行了改进。实验结果显示该算法提高了模糊聚类算法的聚类效果以及搜索能力,在全局寻优能力、跳出局部最优能力、收敛速度等方面具有优势。 相似文献
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模糊C均值聚类(FCM.fuzzy c-means)图像分割方法,对初值选取较敏感,并且需要事先确定聚类数目.为此,提出了一种基于变长度微粒群算法(PSO,particle swarm optimization)优化PBMF模糊聚类的自适应图像分割方法.PBMF指标函数考虑了聚类数目和聚类中心,通过设计变长度PSO算法来实现PBMF指标函数的优化过程,并利用统计直方图将图像从像素窄间映射到灰度直方图特征空间,从而快速地获得图像的最佳聚类数日和聚类中心.对遥感图像的分割实验表明,该自适应分割策略具有全局搜索图像最佳聚类数月和聚类中心的能力,以及较强的抗噪能力. 相似文献
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Ramalingam Vinodha Sundarraj Durairaj Sakkarai Padmavathi 《International Journal of Communication Systems》2022,35(1):e5019
Due to low cost, ease of implementation and flexibility of wireless sensor networks (WSNs), WSNs are considered to be an essential technology to support the smart grid (SG) application. The prime concern is to increase the lifetime in order to find the active sensor node and thereby to find once the sensor node (SN) dies in any region. For this reason, an energy-efficient Dynamic Source Routing (DSR) protocol needs to provide the right stability region with a prolonged network lifetime. This work is an effort to extend the network's existence by finding and correcting the considerable energy leveraging behaviors of WSN. We build a comprehensive model based on real measures of SG path loss for different conditions by using the characteristics of WSN nodes and channel characteristics. This method also establishes a hierarchical network structure of balanced clusters and an energy-harvesting SN. The cluster heads (CHs) are chosen by these SN using a low overhead passive clustering strategy. The cluster formation method is focused on the use of passive clustering of the particle swarm optimization (PSO). For the sake of eliminating delayed output in the WSN, energy competent dynamic source routing protocol (EC-DSR) is used. Chicken swarm optimization (CSO) in which optimum cluster path calculation shall be done where distance and residual energy should be regarded as limitation. Finally, the results are carried out with regard to the packet distribution ratio, throughput, overhead management, and average end-to-end delay to demonstrate the efficiency of the proposed system. 相似文献
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针对数据在性态和类属方面存在不确定性的特点,提出一种基于模糊C均值聚类的数据流入侵检测算法,该算法首先利用增量聚类得到网络数据的概要信息和类数,然后利用模糊C均值聚类算法对获取的数据特征进行聚类。实验结果表明该算法可以有效检测数据流入侵。 相似文献