A filter algorithm based on cochlear mechanics and neuron filter mechanism is proposed from the view point of vibration.It helps to solve the problem that the non-linear amplification is rarely considered in studying ...A filter algorithm based on cochlear mechanics and neuron filter mechanism is proposed from the view point of vibration.It helps to solve the problem that the non-linear amplification is rarely considered in studying the auditory filters.A cochlear mechanical transduction model is built to illustrate the audio signals processing procedure in cochlea,and then the neuron filter mechanism is modeled to indirectly obtain the outputs with the cochlear properties of frequency tuning and non-linear amplification.The mathematic description of the proposed algorithm is derived by the two models.The parameter space,the parameter selection rules and the error correction of the proposed algorithm are discussed.The unit impulse responses in the time domain and the frequency domain are simulated and compared to probe into the characteristics of the proposed algorithm.Then a 24-channel filter bank is built based on the proposed algorithm and applied to the enhancements of the audio signals.The experiments and comparisons verify that,the proposed algorithm can effectively divide the audio signals into different frequencies,significantly enhance the high frequency parts,and provide positive impacts on the performance of speech enhancement in different noise environments,especially for the babble noise and the volvo noise.展开更多
电力时序数据的分类问题是数据挖掘领域中的一个研究热点。对电力用户模式分类可以帮助电网企业分析用户用电特性,实现差异化营销。在回声状态神经网络(echo state network,ESN)基础上引入过程神经元,提出一种用于电力时序数据分类的新...电力时序数据的分类问题是数据挖掘领域中的一个研究热点。对电力用户模式分类可以帮助电网企业分析用户用电特性,实现差异化营销。在回声状态神经网络(echo state network,ESN)基础上引入过程神经元,提出一种用于电力时序数据分类的新型神经网络——过程回声状态网络(process echo state network,PESN)。该网络通过对连接权重进行函数化,实现函数域到实数域的映射。并针对权函数难以训练学习的问题,提出利用基函数的展开形式来逼近权函数的学习算法,从而将回声状态神经网络从时序预测领域进一步扩展到时序分类领域中。仿真实验结果证明,与传统时间序列分类算法相比,过程回声状态网络在用电模式分类实验中表现出了更好的效果。展开更多
基金Project(17KJB510029)supported by the Natural Science Foundation of the Jiangsu Higher Education Institutions,ChinaProject(GXL2017004)supported by the Scientific Research Foundation of Nanjing Forestry University,China+3 种基金Project(202102210132)supported by the Important Project of Science and Technology of Henan Province,ChinaProject(B2019-51)supported by the Scientific Research Foundation of Henan Polytechnic University,ChinaProject(51521003)supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of ChinaProject(KQTD2016112515134654)supported by Shenzhen Science and Technology Program,China。
文摘A filter algorithm based on cochlear mechanics and neuron filter mechanism is proposed from the view point of vibration.It helps to solve the problem that the non-linear amplification is rarely considered in studying the auditory filters.A cochlear mechanical transduction model is built to illustrate the audio signals processing procedure in cochlea,and then the neuron filter mechanism is modeled to indirectly obtain the outputs with the cochlear properties of frequency tuning and non-linear amplification.The mathematic description of the proposed algorithm is derived by the two models.The parameter space,the parameter selection rules and the error correction of the proposed algorithm are discussed.The unit impulse responses in the time domain and the frequency domain are simulated and compared to probe into the characteristics of the proposed algorithm.Then a 24-channel filter bank is built based on the proposed algorithm and applied to the enhancements of the audio signals.The experiments and comparisons verify that,the proposed algorithm can effectively divide the audio signals into different frequencies,significantly enhance the high frequency parts,and provide positive impacts on the performance of speech enhancement in different noise environments,especially for the babble noise and the volvo noise.
文摘电力时序数据的分类问题是数据挖掘领域中的一个研究热点。对电力用户模式分类可以帮助电网企业分析用户用电特性,实现差异化营销。在回声状态神经网络(echo state network,ESN)基础上引入过程神经元,提出一种用于电力时序数据分类的新型神经网络——过程回声状态网络(process echo state network,PESN)。该网络通过对连接权重进行函数化,实现函数域到实数域的映射。并针对权函数难以训练学习的问题,提出利用基函数的展开形式来逼近权函数的学习算法,从而将回声状态神经网络从时序预测领域进一步扩展到时序分类领域中。仿真实验结果证明,与传统时间序列分类算法相比,过程回声状态网络在用电模式分类实验中表现出了更好的效果。
