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结构辨识

结构辨识的相关文献在1989年到2022年内共计92篇,主要集中在自动化技术、计算机技术、机械、仪表工业、无线电电子学、电信技术 等领域,其中期刊论文68篇、会议论文4篇、专利文献1768629篇;相关期刊43种,包括电子科技大学学报、自动化技术与应用、计算机工程与应用等; 相关会议4种,包括2003年中国智能自动化会议、中国自动化学会'97太原学术会议、2005全国自动化新技术学术交流会等;结构辨识的相关文献由255位作者贡献,包括肖建、王辉、张斌等。

结构辨识—发文量

期刊论文>

论文:68 占比:0.00%

会议论文>

论文:4 占比:0.00%

专利文献>

论文:1768629 占比:100.00%

总计:1768701篇

结构辨识—发文趋势图

结构辨识

-研究学者

  • 肖建
  • 王辉
  • 张斌
  • 李天伟
  • 李春鑫
  • 章兢
  • 丁学明
  • 丁悦
  • 丁维明
  • 万德钧
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 李纪宾; 饶欢乐; 王晨; 钱依凡; 洪哲扬
    • 摘要: 大功率LED光度输出不仅与操作电流大小有关,且受传热过程的时滞时变不确定因素影响难以预测.针对传统机理建模存在参数提取困难、模型适应性弱等缺点,提出基于模糊神经网络建模算法,从而构建以操作电流、热沉温度、环境温度为输入,光通量为输出的调光模型.模型结构和参数依据在线数据进行调整,通过递推学习,模糊规则得到增量式完善,进而不断逼近实际动态过程.结果 表明,利用该方法构建的调光模型与参考模型理论值相对误差小于3%,与其他模型相比,结构更加紧凑,预测精度更高.
    • LIU Jun1; CHEN Zedong; CHEN Jie; ZOU Dongyang
    • 摘要: 使用激波装配法时,初始激波是否准确将会对计算过程产生影响.为了确定初始激波的位置,提出了一种新的流场结构辨识算法.该算法以捕捉法计算得到的流场作为系统观测数据,根据密度、压力等参数从该数据中获取激波和接触间断等流动特征周围的网格节点作为离散点集.通过将该离散点集分割成若干子区域,在各子区域内进行分片拟合,最终将离散点集拟合成连续光滑的实体模型,并将此作为初始激波面.在二维方法的基础上,通过引入单位球模型成功将该辨识算法拓展到三维应用.结果表明,采用该方法获得的间断曲面(激波和接触间断)与捕捉法流场中的间断分布吻合较好,作为初始间断面用于装配法可快速得到收敛解.该方法解决了应用激波装配法时确定初始间断面的难题.此外,该方法还可用于网格自适应方法.选择不同流动参数,可以获得相应流场特征结构的空间曲面,在此曲面的基础上可进行网格局部加密或重剖分.该流场结构辨识算法用于网格自适应具有网格尺度自由设置的优势.%A new surface extraction method named source-rays method is proposed to locate and shape initial shock wave surface for shock-fitting algorithms.In this method,the flow field data acquired by the shock-capturing schemes are used as the observed data,and the grid nodes with the features such as shock waves and contact discontinuities are obtained as a discrete point set according to the parameters of density,pressure and others.The discrete point set is finally assembled into a continuous smooth surface by being segmented into several subsets for fragment fitting.Based on the two-dimensional method,this identification algorithm is extended to three-dimensional application by introducing a unit sphere model.The discrete points are fitted to a series of triangular patches with determined connection relationship by a unit sphere,and a smooth continuous surface can be assembled.The results show that the feature surface (shock wave and contact discontinuity ) obtained by the source-rays method coincides with the discontinuous distribution in the flow field calculated by the shock-capturing schemes.By using the extracted feature surface as the initial shock wave surface,the convergence solution can be quickly obtained in shock-fitting algorithm.In addition,this method can also be used in the adaptive mesh refinement procedure.According to different flow parameters,the spatial surfaces of the corresponding flow field structures can be obtained.Based on these surfaces,the mesh grid can be locally refined.This flow field feature surface extraction method has the advantage of grid scale set arbitrarily for mesh adaptation procedure.
    • 马家欣; 许飞云; 黄凯; 黄仁
    • 摘要: The similarities between the general expression for the linear and nonlinear auto-regressive model with exogenous inputs (GNARX) and Volterra series model,and the internal links between the GNARX and the autoregressive model with exogenous inputs (ARX) were analyzed.According to the structure characteristics of the GNARX model,a structure pruning algorithm based on parameters' rate of standard deviation was proposed and applied to model structure identification for the GNARX model.With simulation,the feasibility and effectiveness of the method was verified.Finally,the GNARX model together with the proposed structure identification method was applied to structural damage detection for a steel plate.The results show that the GNARX model,whose structure was identified with structure pruning algorithm based on parameters' rate of standard deviation,has the highest identification accuracy of structural damage.This indicates the superiority of the GNARX model and its structure pruning algorithm applied to structural damage detection.%分析了带有外部输入的线性/非线性自回归模型一般表达式(GNARX)与Volterra级数模型的相似之处,以及GNARX模型与带外部输入的自回归模型(ARX)之间的内在联系.根据GNARX模型结构特点,提出了一种基于参数离差率的结构剪枝算法,并用于模型结构辨识,通过数据仿真,验证了方法的可行性和有效性.最后,将GNARX模型结合提出的结构辨识方法,应用于钢板的损伤识别.结果显示,基于参数离差率的结构剪枝算法辨识GNARX模型结构,其损伤识别精度最高,体现了GNARX模型及其结构剪枝算法应用于结构损伤识别的优越性.
    • 樊双喜; 韩斌; 厉力华; 祝磊; 金丽艳; 李颜娥; 王晟; 应南娇
    • 摘要: 生物学探究的基因关联是类似于因果关系的本质联系,要解决的关键问题是寻找一种可以描述本质联系的方法.针对Dialogue for Reverse Engineering Assessments and Methods第3次竞赛项目(DREAM3)中的大肠杆菌(E.coli)基因调控网络结构辨识问题,提出一种基于再生核希尔伯特空间(RKHS)的统计独立性度量方法——Hilbert-Schmidt独立性准则(HSIC).此方法是一种基于分布的非参数独立性度量方法,并不要求数据符合某种特定分布,不以分类率、模型简单度等外部条件作为约束条件,同时非参数定量地描述变量之间的联系程度.对大肠杆菌基因表达数据的实验结果显示,尽管数据集中的时间序列数据样本很小,并且只提供了较弱的和类型复杂的调控信息,但HSIC方法仍能较好地辨识出这种较为隐含且复杂的调控关系.对比计算显示,在3种数据规模下,采用HSIC方法辨识结果的AUROC值高于Granger Causality(GC)方法23个百分点,高于参与此竞赛的第1名3.9个百分点,而且在计算效率上亦高出其所使用的微分方程法3个数量级.
    • 郑高
    • 摘要: 本文综述二型模糊系统辨识方法的研究与发展现状。首先简单回顾二型模糊集合与二型模糊系统的基本知识;其次从结构辨识与参数辨识两个方面来研究二型模糊系统辨识方法;最后指出了现阶段存在的不足与未来的发展方向。
    • 陈晓科; 周天睿; 李欣; 康重庆; 陈启鑫
    • 摘要: 日益凸显的气候变化和能源问题对电力行业提出了低碳化发展的迫切要求。文中根据电力系统碳排放的产生机理,剖析了电力行业碳排放的结构及其影响因素,建立了基于增量分析法的电力系统碳排放结构辨识与评价方法,并提出了按照碳排放结构评价其低碳化贡献的方法。根据国内“2020年非化石能源消费比重提高到15%”的发展目标,从电力碳排放构成分量中挖掘出可对该目标作出贡献的部分,建立了电力系统低碳目标贡献率的计算方法。以广东省为例,计算了该省2010年至2020年间碳排放的构成及其对中国2020年能源低碳化发展目标的贡献率,验证了所提出方法的效果。%The key points, difficulties, and developments of distributed energy resources and energy efficiency as seen at the 21st International Conference on Electricity Distribution (CIRED 2011) are presented. The introduction mainly focuses on four directions, i.e. distributed generation(DG)/distributed energy resource (DER) planning and studies, control of networks with DG/DER, customer side development and DG/DER technology. These topics are hoped to help engineers and researchers widen their vision in related research fields and deepen their understanding of the problems, opportunities, and challenges faced by the distribution system, and finally to promote the R&D and engineering application of smart grid technologies in China.
    • 丁学明; 沈业茂; 张久忠
    • 摘要: T-S model is sum of linear subsystems and its weight product, which is able of approaching arbitrary nonlinear systems. T-S model global optimal identification scheme is presented based on Genetic Algorithm (GA) and Support Vector Machine (SVM). Structure and parameter identification of T-S model is realized by GA at the same time. Evaluation function is structure risk minimum, which considers model complexity and identification error. The algorithm advantages are high precision and good generalization of identification. The simulation result illustrates the effectiveness of the proposed method.%T-S模型把一个非线性系统当做多个线性子系统与其权重乘积之和,能够逼近任意非线性系统.提出基于遗传算法和支持向量机的T-S模型全局优化辨识方法,利用遗传算法同时辨识T-S模型的结构和参数,以结构风险最小化作为辨识的评价指标,综合考虑模型复杂度和辨识误差,辨识精度高,泛化能力强,仿真结果证明了算法的有效性.
    • 李晶皎; 许哲万; 郭先日; 李海朋
    • 摘要: To improve the effectiveness of the existing fuzzy identification method, a structure identification method based on moving rating was proposed for T-S fuzzy model. The main work is as below. Firstly, the moving rates for S-type,Z-type and trapezoidal membership functions of T-S fuzzy model were defined,and compared with proposed moving rate and the existing grade of the membership function, the proposed moving rate is more effective. Next,T-S fuzzy reasoning method based on moving rating was proposed, and the identification methods for premise and consequence based on moving rate were proposed for T-S model. Finally,the proposed identification method was applied to the fuzzy modeling for the precipitation forecast and security situation predictioa Test results, compared with existing method and fuzzy neural network algorithm, show that the proposed method significantly improves the effectiveness of fuzzy identification, and reduces the number of rule and identification error.%为了提高现行模糊辨识方法的有效性,提出了基于移动率的T-S模糊模型的结构辨识方法.主要工作如下:首先,定义T-S模糊模型的S型、Z型和梯形隶属函数的移动率,将此移动率与现行的隶属度相比较可以看出,提出的方法比较有效;然后,定义基于移动率的T-S模糊推理方法,并且提出基于移动率的前提和结论部分的T-S模型的辨识方法;最后,将提出的识别方法应用于降水量和安全形势的预测模糊建模.测试结果表明,与现行方法和模糊神经网络算法相比,该方法明显提高了模糊辨识的有效性,减少了规则数目,并降低了辨识误差.
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