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2R-1C模型；嵌入式系统；参数估计；非迭代方法；二次型 1

主动磁悬浮轴承；迭代学习控制；干扰观测器 1

地理设计 1

地震响应 1

城市基础设施 1

城市设计 1

多普勒频偏 1

多目标优化 1

多站外辐射源雷达；压缩感知；相位修正；定点迭代技术 1

无功电流 1

无线信息与能量同时传输；信道状态信息；鲁棒波束形成；半定松弛；迭代次梯度 1

最优化 1

有功电流 1

有源电力滤波器 1

模糊控制 1

混合体；积分方程；矩量法；加法定理；迭代 1

空间信道配对；相干合并；交替迭代结构；误符号率；分布式空时码 1

能源表现 1

自相关 1

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Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremely

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

《结构与土木工程前沿（英文）》 2020年第14卷第2期页码 446-472 doi: 10.1007/s11709-019-0605-8

摘要： The main purpose of the present study is to enhance high-level noisy data by a wavelet-based iterative filtering algorithm for identification of natural frequencies during ambient wind vibrational tests on a petrochemical process tower. Most of denoising methods fail to filter such noise properly. Both the signal-to-noise ratio and the peak signal-to-noise ratio are small. Multiresolution-based one-step and variational-based filtering methods fail to denoise properly with thresholds obtained by theoretical or empirical method. Due to the fact that it is impossible to completely denoise such high-level noisy data, the enhancing approach is used to improve the data quality, which is the main novelty from the application point of view here. For this iterative method, a simple computational approach is proposed to estimate the dynamic threshold values. Hence, different thresholds can be obtained for different recorded signals in one ambient test. This is in contrast to commonly used approaches recommending one global threshold estimated mainly by an empirical method. After the enhancements, modal frequencies are directly detected by the cross wavelet transform (XWT), the spectral power density and autocorrelation of wavelet coefficients. Estimated frequencies are then compared with those of an undamaged-model, simulated by the finite element method.

关键词： ambient vibration test high level noise iterative signal enhancement wavelet cross and autocorrelation of wavelets

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Iterative finite element model of nonlinear viscoplastic analyses for blended granular porous media

WU Yuching, ZHU Cimian

《结构与土木工程前沿（英文）》 2007年第1卷第4期页码 464-473 doi: 10.1007/s11709-007-0063-6

摘要： The iterative finite element model, in which an element is used to represent a single particle, is generated to analyze the global behavior of multiple-material aggregates of materially nonlinear viscoplastic particles. The genera

关键词： nonlinear viscoplastic iterative behavior multiple-material

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Improving prodeoxyviolacein production via multiplex SCRaMbLE iterative cycles

Juan Wang, Bin Jia, Zexiong Xie, Yunxiang Li, Yingjin Yuan

《化学科学与工程前沿（英文）》 2018年第12卷第4期页码 806-814 doi: 10.1007/s11705-018-1739-2

摘要：

The synthetic chromosome rearrangement and modification by loxP-mediated evolution (SCRaMbLE) system has been used to improve prodeoxyviolacein (PDV) production in haploid yeast containing chromosome synV. To rapidly and continuously generate genome diversification with the desired phenotype, the multiplex SCRaMbLE iterative cycle strategy has been developed for the screening of high PDV production strains. Whole-genome sequencing analysis reveals large duplications, deletions, and even the whole genome duplications. The deletion of YER151C is proved to be responsible for the increase. This study demonstrates that artificial DNA rearrangement can be used to accelerate microbial evolution and the production of biobased chemicals.

关键词： synthetic biology genome rearrangement prodeoxyviolacein SCRaMbLE Saccharomyces cerevisiae

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A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication

null

《机械工程前沿（英文）》 2014年第9卷第2期页码 156-167 doi: 10.1007/s11465-014-0297-7

摘要：

A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication (EHL) problems is presented. First, by introducing a special matrix splitting iteration method into the traditional compound direct iterative method, the full matrices for the linear systems of equations are transformed into sparse banded ones with any half-bandwidth; then, an extended Thomas method which can solve banded linear systems with any half-bandwidth is derived to accelerate the computing speed. Through the above two steps, the computational complexity of each iteration is reduced approximately from O(N3/3) to O(β2N), where N is the total number of nodes, and β is the half-bandwidth. Two kinds of numerical results of transient EHL line contact problems under sinusoidal excitation or pure normal approach process are obtained. The results demonstrate that the new algorithm increases computing speed several times more than the traditional compound direct iterative method with the same numerical precision. Also the results show that the new algorithm can get the best computing speed and robustness when the ratio, half-bandwidth to total number of nodes, is about 7.5%–10.0% in moderate load cases.

关键词： elastohydrodynamic lubrication transient line contact matrix splitting iteration method the Thomas method

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模糊迭代学习方法及高层建筑结构地震响应控制的数值模拟

汪权,王建国,张鸣祥

《中国工程科学》 2011年第13卷第4期页码 81-86

摘要：

结合自校正控制、模糊逻辑和迭代学习控制的基本思想，提出采用自整定模糊控制确定迭代学习律的方法，提高了迭代学习控制的鲁棒性。选取建筑结构振动控制Benchmark第二阶段的地震作用Benchmark模型作为研究对象，进行模糊迭代学习控制地震响应仿真计算，结果表明该方法能够对Benchmark模型的地震响应进行有效控制，而且具有学习控制律简单实用、跟踪精度高、鲁棒性强等优点。

关键词：高层建筑地震响应迭代学习控制模糊控制

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针对主动磁悬浮轴承干扰抑制的一类结合迭代学习控制与干扰观测器的解决方法 None

Ze-zhi TANG, Yuan-jin YU, Zhen-hong LI, Zheng-tao DING

《信息与电子工程前沿（英文）》 2019年第20卷第1期页码 131-140 doi: 10.1631/FITEE.1800558

摘要：针对主动磁悬浮轴承系统，传统迭代学习控制可实现高精度轨迹跟踪，但系统扰动必须限定为不随迭代变化。基于目前方法，提出一种抑制主动磁悬浮轴承系统中随迭代变化的不匹配扰动方法。在该方案中，结合经典迭代学习控制和普适性扩张观测器，在使用输出反馈信息情况下，可在每次迭代过程中估计并抑制外界变化干扰。分析证明了整个闭环系统的收敛性，同时，仿真结果表明，相比传统迭代学习控制，该控制方法轨迹跟踪性能更加优良。

关键词：主动磁悬浮轴承；迭代学习控制；干扰观测器

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适于低成本嵌入式硬件的2R-1C模型非迭代参数估计 Article

Mitar SIMIĆ, Zdenka BABIĆ, Vladimir RISOJEVIĆ, Goran M. STOJANOVIĆ

《信息与电子工程前沿（英文）》 2020年第21卷第3期页码 476-490 doi: 10.1631/FITEE.1900112

摘要： 2R-1C模型的参数估计常运用需要高性能处理单元的迭代方法，从而激励我们研究更省时且更节能的参数估计方法。这些低复杂度的算法将更适于便携式微机设备的运行。本文提出二次插值非迭代参数估计方法（QINIPE）；该方法基于测量阻抗虚部的二次插值，能够更精确地估计特征频率。运用一组封闭表达式从测量阻抗的实部和虚部计算2R-1C模型的参数。对仿真和测量获得的模型阻抗数据作对比分析；结果表明，相较于我们早前提出的非迭代参数估计方法（NIPE），QINIPE能减少80%测量点，且所有估计参数的相对估计误差低于1%。两种非迭代方法均基于一个微机设备实施；检测了估计精度、RAM、闪存使用以及运行时间。实验结果表明，相较于NIPE，QINIPE轻微增加了0.576 ms运行时间（约6.7%），且需要多24%（1.2 KB）闪存及多2.4%（32字节）RAM。然而，QINIPE的阻抗均方根误差分别降低至NIPE对应的42.8%（实部）和64.5%（虚部）。此外，比较了QINIPE和复杂非线性最小二乘法（CNLS）对2R-1C模型参数的估计。结果表明，虽然QINIPE估计精度稍低于CNLS，其依然适合许多实际应用，且运行时间降至原来的1/45至1/30。

关键词： 2R-1C模型；嵌入式系统；参数估计；非迭代方法；二次型

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Iterative HOEO fusion strategy: a promising tool for enhancing bearing fault feature

《机械工程前沿（英文）》 2023年第18卷第1期 doi: 10.1007/s11465-022-0725-z

摘要： As parameter independent yet simple techniques, the energy operator (EO) and its variants have received considerable attention in the field of bearing fault feature detection. However, the performances of these improved EO techniques are subjected to the limited number of EOs, and they cannot reflect the non-linearity of the machinery dynamic systems and affect the noise reduction. As a result, the fault-related transients strengthened by these improved EO techniques are still subject to contamination of strong noises. To address these issues, this paper presents a novel EO fusion strategy for enhancing the bearing fault feature nonlinearly and effectively. Specifically, the proposed strategy is conducted through the following three steps. First, a multi-dimensional information matrix (MDIM) is constructed by performing the higher order energy operator (HOEO) on the analysis signal iteratively. MDIM is regarded as the fusion source of the proposed strategy with the properties of improving the signal-to-interference ratio and suppressing the noise in the low-frequency region. Second, an enhanced manifold learning algorithm is performed on the normalized MDIM to extract the intrinsic manifolds correlated with the fault-related impulses. Third, the intrinsic manifolds are weighted to recover the fault-related transients. Simulation studies and experimental verifications confirm that the proposed strategy is more effective for enhancing the bearing fault feature than the existing methods, including HOEOs, the weighting HOEO fusion, the fast Kurtogram, and the empirical mode decomposition.

关键词： higher order energy operator fault diagnosis manifold learning rolling element bearing information fusion

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Applications of traditional pump design theory to artificial heart and CFD simulation

WANG Yingpeng, SONG Xinwei, YING Chuntong

《能源前沿（英文）》 2008年第2卷第4期页码 504-507 doi: 10.1007/s11708-008-0059-5

摘要： A novel heart pump model was obtained by improving the traditional axial pump design theory with the consideration of working and hydraulic situations for artificial hearts. The pump head range and the velocity triangle were introduced and an iterative approach was utilized for the initial model. Moreover, computational fluid dynamics (CFD) simulations were performed to determine relevant model parameters. The results show that this procedure can be used for designing a series of high-efficiency artificial heart pumps.

关键词： computational high-efficiency artificial iterative approach artificial traditional

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自适应最优相关间隔选择的多普勒频偏估计算法

张彭,毕光国,曹秀英,袁晓辉

《中国工程科学》 2007年第9卷第6期页码 71-76

摘要：

在信道自相关特性的多普勒频偏估计算法的基础上，分析了存在的估计性能不受信噪比和频偏变化影响的最优相关间隔。利用该特性提出一种逐次缩小搜索范围的迭代（CIO，correlation唱interval optimized）算法，实现对其搜索和最大多普勒频偏的估计。通过仿真证明理论分析的正确及算法的有效性。与传统基于相关估计算法相比，该算法自适应于信噪比和频偏变化，估计性能基本上独立于信噪比和频偏的变化，实现多普勒频偏的直接性能估计。

关键词：多普勒频偏自相关最优化迭代

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基于迭代算法的有源电力滤波器谐波电流实时检测新方法

李自成,孙玉坤

《中国工程科学》 2006年第8卷第1期页码 46-50

摘要：

目前，已经提出了多种有源电力滤波器谐波及无功电流检测方法，尽管这些方法各有特点，但都存在着难以克服的问题，如计算量大，实时性差，检测精度不高等。文章在负载电流分析的基础上，提出了一种基于迭代算法的有源电力滤波器谐波电流实时检测方法，该方法具有计算量非常小，实时性好，检测精度高等特点。理论分析与仿真研究证实了该方法的正确性。

关键词：有源电力滤波器谐波电流有功电流无功电流

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任意金属—介电混合体面体面电场积分方程（SVS-EFIE）的增强解 Research Article

王涵,庞铭杰,林海

《信息与电子工程前沿（英文）》 2022年第23卷第7期页码 1098-1109 doi: 10.1631/FITEE.2100387

摘要：利用矩量法求解面体面电场积分方程（SVS-EFIE），公式复杂，实现困难，算法复杂度高。本文提出求解任意金属—介电混合体电磁散射问题的通用矩阵方程（GME），并给出该方程的增强解。矩量法只考虑包含3个区域的金属—介电混合体，且SVS-EFIE的两步过程导致两个积分符号，难以实现且算法复杂度高。为解决该问题，本文首次提出能够用于分析均匀介质体和超过3个区域金属—介电混合体的GME方法。提出基于耦合度和子区域间距相关的GME加速求解策略，并自适应设置耦合度标准以平衡精度和效率。将变形后的加法定理用于强耦合情况，将迭代法用于弱耦合情况。并行性可以方便地应用于该增强解。数值结果表明，与直接解相比，该方法平均只需11.6%的内存和11.8%的中央处理器时间。

关键词：混合体；积分方程；矩量法；加法定理；迭代

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基于迭代方法的联合压缩感知与相位修正多站外辐射源雷达成像算法研究 None

Jue WANG, Jun WANG

《信息与电子工程前沿（英文）》 2018年第19卷第4期页码 557-568 doi: 10.1631/FITEE.1601423

摘要：受限于机会照射源信号通常为窄带信号，多站外辐射源雷达成像系统分辨率通常较低。另外，由于跟踪系统精度影响及站址测量过程中存在测量误差，系统成像质量会严重下降。为提高多站外辐射源雷达成像系统成像性能，开展了基于层析成像原理的高分辨外辐射源雷达成像算法研究。进一步，将压缩感知技术应用于外辐射源雷达成像系统中，以改善系统成像分辨力。最后，针对非合作平台测量误差引入的相位误差，提出相应的外辐射源雷达成像系统相位补偿方法。通过最小化图像的重构误差建立了相位误差求解模型，基于定点迭代技术对相位误差模型求解。所提相位误差补偿技术是一种非参数化方法，可用于补偿任意形式相位误差。理论分析与仿真实验验证了所提方法的有效性和收敛性。

关键词：多站外辐射源雷达；压缩感知；相位修正；定点迭代技术

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无线信息与能量同时传输的鲁棒协作中继波束形成优化设计 None

Lu-lu ZHAO, Xing-long JIANG, Li-min LI, Guo-qiang ZENG, Hui-jie LIU

《信息与电子工程前沿（英文）》 2018年第19卷第11期页码 1432-1443 doi: 10.1631/FITEE.1601268

摘要：研究了应用于无线信息与能量同时传输的协作中继波束形成设计。基于中继节点拥有理想信道状态信息的假设，提出一种非鲁棒波束形成设计。实际中信道状态信息误差通常不可避免，为此，提出一种鲁棒波束形成设计。采用二分法和半定松弛法解决非鲁棒和鲁棒波束形成设计的非凸优化问题。由于半定松弛法的解不总是秩一的，提出一种迭代次梯度法求秩一解。仿真结果表明，在非理想信道状态信息下，所提鲁棒波束形成设计性能优于非鲁棒设计。

关键词：无线信息与能量同时传输；信道状态信息；鲁棒波束形成；半定松弛；迭代次梯度

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单中继系统中基于空间信道配对和相干合并的交替迭代结构 Article

Feng SHU,Xiao-hui HUANG,Jin-song HU,Ting-ting LIU,Ri-qing CHEN,Xiao-hu YOU,Jun LI,Jin WANG

《信息与电子工程前沿（英文）》 2016年第17卷第9期页码 938-945 doi: 10.1631/FITEE.1500436

摘要：概要：在单中继系统中，对于给定空间信道配对（spatial channel pairing, SCP）方案，可以推导出最佳相干合并的闭式解；对于给定相干合并方案，也可以得到SCP的近似解析解。由此，本文设计了一种基于SCP和相干合并的交替迭代结构。仿真结果表明：相较于现有的最大比合并加匹配滤波，最大比合并加天线选择以及分布式空时码算法，本文提出的交替迭代结构能够提供更为可观的信噪比增益。

关键词：空间信道配对；相干合并；交替迭代结构；误符号率；分布式空时码

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标题作者时间类型操作

Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremely

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

期刊论文

Iterative finite element model of nonlinear viscoplastic analyses for blended granular porous media

WU Yuching, ZHU Cimian

期刊论文

Improving prodeoxyviolacein production via multiplex SCRaMbLE iterative cycles

Juan Wang, Bin Jia, Zexiong Xie, Yunxiang Li, Yingjin Yuan

期刊论文