共查询到19条相似文献,搜索用时 63 毫秒
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首先介绍了备品备件管理现状,然后分析了运维外包方式的优缺点,接着分析了备品备件储备数量优化、备件中心选址、备品备件管理优化以及备品备件管理的流程化和规范化,最后分析了备品备件管理工作对网络建设规划的指导意义. 相似文献
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备品备件管理,是广播电视系统保障安全播出工作所需的各种备用设备的管理体系,包括对备品备件的计划、采购、验收、出入库、盘点等的动态控制及预警管理.本文介绍了备品备件的几种分类管理方法,结合北京地球站备品备件管理的实际情况,分析阐述了播出机房中目前采用的备品备件定额管理方法. 相似文献
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模糊神经网络的交叉研究 总被引:13,自引:0,他引:13
介绍模糊神经网络交叉的基础与途径,从基于神经网络的模糊逻辑系统和用模糊逻辑增强的的神经网络两个方面介绍了模糊神经网络交叉研究的具体实现,最后指出模糊神经网络交叉的未来方向。 相似文献
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提出了一种基于去模糊优化的模糊神经网络控制器及模糊神经网络的遗传学习算法.利用遗传算法优化包含控制器性能的指标来离线寻找最优的模糊神经网络控制器结构和参数,经过遗传算法训练的模糊神经网络控制器被接入模糊神经网络智能控制系统中.仿真结果表明,利用此方法实现的控制,系统的控制精度高,超调量小,鲁棒性能很强,获得了良好的控制效果. 相似文献
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模糊信息处理与模糊神经网络 总被引:4,自引:0,他引:4
模糊神经网络结合模糊逻辑具有较强的结构性知识表达能力(即描述系统定性知识的能力),神经网络具有强大的自学习与定量数据的直接处理能力,从而具有一定的处理定性与定量知识的技术和方法。 相似文献
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随着电信网络规模的快速发展,如何在满足一定备件保障率的条件下降低备件配置数量,达到优化管理、降低成本的目的,成为电信运营企业面临的重要课题.本研究利用运筹学方法,分析整个备件系统的消长规律,并对备件数量配置进行了量化分析,得出特定约束条件下备件数量的最小值.最后通过一个实际应用系统的实现和仿真研究,对计算结果进行了验证分析. 相似文献
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本文介绍了模糊神经网络的基本概念,以及90年代在模糊神经网络发展中取得的重要研究成果,并且预测了这门新兴技术在未来诸多领域中的应用剪影。 相似文献
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访问控制系统中风险量化具有不确定性,非线性等特点,无法确定具有良好效果的求解规则.本文将模糊理论、人工神经网络、小波分析及量子粒子群优化算法有机结合,提出了模糊小波神经网络(fuzzy wavelet neural network,Fuzzy WNN)的风险量化方法,通过模糊综合评判法对主体、客体等的属性信息进行评价量化,作为小波神经网络的输入量,小波神经网络的输出量为量化的风险值,并对小波神经网络的训练算法进行改进优化.仿真结果表明,本文提出的算法可对访问请求风险实现有效量化,克服现有的量化方法所存在的主观随意性大、结论模糊等缺陷. 相似文献
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《Mechatronics》2001,11(1):95-117
In this study, the dynamic responses of an adaptive fuzzy neural network (FNN) controlled toggle mechanism is described. The toggle mechanism is driven by a permanent magnet (PM) synchronous servo motor. First, based on the principle of computed torque, an adaptive controller is developed to control the position of a slider of the motor-toggle servomechanism. Since the selection of control gain of the adaptive controller has a significant effect on the system performance, an adaptive FNN controller is proposed to control the motor-toggle servomechanism. In the proposed adaptive FNN controller, an FNN is adopted to facilitate the adjustment of control gain on line. Moreover, simulated and experimental results due to a periodic sinusoidal command show that the dynamic behaviors of the proposed adaptive and adaptive FNN controllers are robust with regard to uncertainties. 相似文献
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Temperature control with a neural fuzzy inference network 总被引:7,自引:0,他引:7
Chin-Teng Lin Chia-Feng Juang Chung-Ping Li 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》1999,29(3):440-451
Although multilayered backpropagation neural networks (BPNNs) have demonstrated high potential in adaptive control, their long training time usually discourages their applications in industry. Moreover, when they are trained online to adapt to plant variations, the over-tuned phenomenon usually occurs. To overcome the weakness of the BPNN, we propose a neural fuzzy inference network (NFIN) suitable for adaptive control of practical plant systems in general and for adaptive temperature control of a water bath system in particular. The NFIN is inherently a modified Takagi-Sugeno-Kang (TSK)-type fuzzy rule based model possessing a neural network's learning ability. In contrast to the general adaptive neural fuzzy networks, where the rules should be decided in advance before parameter learning is performed, there are no rules initially in the NFIN. The rules in the NFIN are created and adapted as online learning proceeds via simultaneous structure and parameter identification. The NFIN has been applied to a practical water bath temperature control system. As compared to the BPNN under the same training procedure, the simulated results show that not only can the NFIN greatly reduce the training time and avoid the over-tuned phenomenon, but the NFIN also has perfect regulation ability. The performance of the NFIN is compared to that of the traditional PID controller and fuzzy logic controller (FLC) on the water bath temperature control system. The three control schemes are compared, with respect to set point regulation, ramp-point tracking, and the influence of unknown impulse noise and large parameter variation in the temperature control system. The proposed NFIN scheme has the best control performance 相似文献