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基于神经状态空间的非线性系统建模研究
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作者 王永骥 吴庆 王宏 《系统仿真学报》 CAS CSCD 2001年第z1期12-14,共3页
提出了一种基于神经状态空间的非线性系统建模方法。神经状态空间(NNSP)具有系统的拟线性特性,许多线性系统控制器设计方法均可以扩展到 NNSP模型。本文采用了增广卡尔曼滤波方法进行神经状态空间的参数辨识,高阶校验模型用于验证非线... 提出了一种基于神经状态空间的非线性系统建模方法。神经状态空间(NNSP)具有系统的拟线性特性,许多线性系统控制器设计方法均可以扩展到 NNSP模型。本文采用了增广卡尔曼滤波方法进行神经状态空间的参数辨识,高阶校验模型用于验证非线性系统神经状态空间的模型的有效性 。将本法应用于典型的化学过程的建模,结果表明本方法正确有效。 展开更多
关键词 神经状态空间模型 增广Kalman滤波 连续搅拌釜式反应器 (CSTR)
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时间知觉的脑机制:时钟模型的困境和新导向 被引量:8
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作者 万群 林苗 钱秀莹 《心理科学进展》 CSSCI CSCD 北大核心 2010年第3期394-402,共9页
长期以来人们认为神经系统是通过类似于时钟的方式来实现对一段时间的知觉的,并认为多巴胺能系统(基地神经节)和时钟的快慢有关。与多巴胺信号有关的药物的动物实验的结果以及帕金森氏症(parkinson’s disease)患者的行为表现被看作是... 长期以来人们认为神经系统是通过类似于时钟的方式来实现对一段时间的知觉的,并认为多巴胺能系统(基地神经节)和时钟的快慢有关。与多巴胺信号有关的药物的动物实验的结果以及帕金森氏症(parkinson’s disease)患者的行为表现被看作是支持以上看法的证据。然而,最近的大量研究对这个理论提出了挑战,结合行为研究和脑机制研究的新成果,研究者提出了知觉信息可以通过神经活动状态或加工中的能量消耗来表达。 展开更多
关键词 时间知觉 脑机制 时钟模型 神经状态模型 能量消耗模型
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Complex Behavior in a Selective Aging Neuron Model Based on Small World Networks
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作者 ZHANG Gui-Qing CHEN Tian-Lun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第2期409-413,共5页
Complex behavior in a selective aging simple neuron model based on small world networks is investigated. The basic elements of the model are endowed with the main features of a neuron function. The structure of the se... Complex behavior in a selective aging simple neuron model based on small world networks is investigated. The basic elements of the model are endowed with the main features of a neuron function. The structure of the selective aging neuron model is discussed. We also give some properties of the new network and find that the neuron model displays a power-law behavior. If the brain network is small world-like network, the mean avalanche size is almost the same unless the aging parameter is big enough. 展开更多
关键词 selective aging self-organized criticality small world networks finite-size-scaling analysis POWER-LAW
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Reduced Model for Power System State Estimation Using Artificial Neural Networks
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作者 Amamihe Onwuachumba Yunhui Wu Mohamad Musavi 《Journal of Energy and Power Engineering》 2014年第5期957-965,共9页
In this paper, a new technique using artificial neural networks for power system state estimation is presented. This method does not require network observability analysis and uses fewer measurement variables than con... In this paper, a new technique using artificial neural networks for power system state estimation is presented. This method does not require network observability analysis and uses fewer measurement variables than conventional techniques. This approach has been successfully implemented on six-bus, 18-bus, IEEE 14-bus and IEEE 57-bus power systems and the results show that this method is very accurate and a lot faster than conventional techniques making it ideal for smart grid applications. 展开更多
关键词 Artificial neural networks network observability power systems state estimation.
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Data mining-based study on sub-mentally healthy state among residents in eight provinces and cities in China 被引量:3
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作者 Hongmei Ni Xuming Yang +3 位作者 Chengquan Fang Yingying Guo Mingyue Xu Yumin He 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2014年第4期511-517,共7页
OBJECTIVE: To apply data mining methods to research on the state of sub-mental health among residents in eight provinces and cities in China and to mine latent knowledge about many conditions through data mining and a... OBJECTIVE: To apply data mining methods to research on the state of sub-mental health among residents in eight provinces and cities in China and to mine latent knowledge about many conditions through data mining and analysis of data on 3970 sub-mentally healthy individuals selected from 13385 relevant question naires.METHODS: The strategic tree algorithm was used to identify the main mani festations of the state of sub-mental health. The backpropogation artificial neural network was used to analyze the main mani festations of sub-healthy mental states of three different degrees. A sub-mental health evaluation model was then established to achieve predictive evaluationresults.RESULTS: Using classifications from the Scale of Chinese Sub-healthy State, the main manifestations of sub-mental health selected using the strate gictree were F1101(Do you lack peace of mind?),F1102(Are you easily nervous when something comes up?), and F1002(Do you often sigh?). The relative intensity of manifestations of sub-mental health was highest for F1101, followed by F1102,and then F1002. Through study of the neural network, better differentiation could be made between moderate and severe and between mild and severe states of sub-mental health. The differentiation between mild and moderate sub-mental health states was less apparent. Additionally, the sub-mental health state evaluation model, which could be used to predict states of sub-mental health of different individuals, was established using F1101, F1102, F1002, and the mental self-assessment totals core.CONCLUSION: The main manifestations of the state of sub-mental health can be discovered using data mining methods to research and analyze the latent laws and knowledge hidden in research evidence on the state of sub-mental health. The state of sub-mental health of different individuals can be rapidly predicted using the model established here.This can provide a basis for assessment and intervention for sub-mental health. It can also replace the relatively outdated approaches to research on sub-health in the technical era of information and digitization by combining the study of states of sub-mental health with information techniques and by further quantifying the relevant information. 展开更多
关键词 Questionnaires Mental health Data mining Strategictree Artificial neural network
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