排序方式: 共有125条查询结果,搜索用时 62 毫秒
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一种估计网络可靠性的蒙特卡洛方法 总被引:2,自引:0,他引:2
将K—终端剩余连通可靠度的概念推广到链路存在失效状态的网络模型上,并提出了计算该可靠度的基于RVR的蒙特卡洛方法。首先对网络链路的状态进行抽样。在网络所有链路状态确定的前提下计算网络的K—终端剩余连通可靠度,即等价于计算相同拓扑结构,链路完全可靠网络的K—终端剩余连通可靠度,对于后者可采用H.Cancela等提出的基于RVR的蒙特卡洛算法。实践证明该估计方法是无偏的,且与原始的蒙特卡洛方法相比具有较小的方差。 相似文献
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An ants-based on-demand routing algorithm (AORA) specialized for mobile ad hoc networks is proposed. AORA measures the network's traffic information including delivery time, route energy etc. by the continuous delivery of data packets, then calculates the compositive parameter for each route which can be seen as the stigmity and uses it to choose the comparatively optimal route in real time. To adjust the weight of each traffic information, the algorithm can meet the different demand of the network's user. Multipath source self repair routing (MSSRR) algorithm and dynamic source routing (DSR) can be seen as the special samples of AORA. The routing overhead is not increased in this algorithm. By using simulation, it can be seen that the performance of AORA is better than that of DSR in all scenarios obviously, especially the delivery fraction is increased by more than 100 96. 相似文献
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基于形态学和自适应模糊内插的红外图像放大 总被引:3,自引:0,他引:3
提出一种有效的红外图像放大算法,该算法和常用的基于双线性内插进行图像放大的算法有所不同.文中算法首先采用基于形态学的预处理算法对红外图像进行预处理;以使得边缘定位更容易;然后采取一种自适应模糊内插算法进行图像放大,该算法克服了一些基于双线性内插算法进行图像放大的算法的缺点;最后,给出文中算法和基于双线性内插算法进行图像放大的算法的实验结果.实验结果表明,文中算法有效地提高了放大图像的质量. 相似文献
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一种新的模糊边缘检测算法 总被引:7,自引:0,他引:7
提出了一种简单有效的模糊边缘检测算法,此算法和常用的基于图像增强技术来进行模糊边缘检测的算法有所不同,它采用缩短模糊边缘的宽度来提取模糊边缘,克服了一些基于增强技术来提取模糊边缘的缺点。最后给出了对红外热像的边缘检测实验,实验表明,此算法是一种简单、实用、有效的边缘检测算法。 相似文献
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Knowledge acquisition is the “botdeneck“ of building an expert system. Based on the optimization model, an improved genetic algorithm applied to knowledge acquisition of a network fault diagnostic expert system is proposed. The algorithm applies operators such as selection, crossover and mutation to evolve an initial popula-tion of diagnostic rules. Especially, a self-adaptive method is put forward to regulate the crossover rate and muta-tion rate. In the end, a knowledge acquisition problem of a simple network fault diagnostic system is simulated,the results of simulation show that the improved approach can solve the problem of convergence better. 相似文献
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机组启停机计划是发电公司参与电力市场竞争的重要决策依据.市场环境下,出清价格具有高度不确定性,必须在机组自组合决策中给予考虑.在市场出清价格模糊描述的基础上,提出不确定环境下含有启停机爬坡速率和升降出力爬坡速率约束的火电机组自组合模糊优化方法,通过分析真实市场参与者的决策取向,提出一种新的精确化方法,并采用动态规划模型求解精确优化问题,同时给出了精确化过程中多目标偏好系数的选择建议.算例分析表明,模糊机组自组合方法能灵活反映决策目标,是市场环境下一种新的不确定性决策方法. 相似文献