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AUTOMATICALLY EXTRACTING AND OPTIMIZING FUZZY RULE BASE

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Journal of electronics(china) 1996年第4期13卷 296-302页

作者： Gu Linyue zhang Liming(electronic engineering department of fudan university, shanghai 200433)

A method of automatically extracting and optimizing fuzzy rule base is presented in this paper. Firstly, it applies the method of CCM (cell-to-cell mapping) to analyze the evolving trend and global behavior of a fuzzy dynamical system based on a cell state space, which is characterized by equilibrium, cost and their domain of attractions. Secondly, each rule base is evaluated to determine a performance index based on the information of the system obtained by CCM. Thirdly, CA (Genetic Algorithm) optimizes the coded rule bases according to the performance index generation by generation. The method presented in this paper can be applied to various systems (linear or nonlinear, continuous or discrete) to automatically obtain optimal rule base, for it fuses the advantages of GA and CCM. As an example, a complicated nonlinear system-an inverted pendulum is simulated to demonstrate the validity of the method.

关键词： GA( Genetic Algorithm) CCM(Cell-to-Cell Mapping) Chromosome Fit ness Reproduction Crossover Mutation

Motion Estimation Based on Global and Local Compensability Analysis

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Journal of Systems engineering and electronics 1997年第2期8卷 19-23页

作者： Fan Jinping(shanghai Institute of Optics and Fine Mechanics, Academia Sinica, 201800, P. R. china)zhang Liming(department of electronic engineering, fudan university, shanghai 200433, P. R. china) shanghai Institute of Optics and Fine Mechanics Academia Sinica 201800 P. R. China department of electronic engineering Fudan University Shanghai 200433 P. R. China department of Computer Science Fudan University Shanghai 200433 P. R. China

This paper reports our study of a novel motion estimation algorithm based on global and local compensability analysis. The spatial correlation of motion field is used to reduce the burden of estimation computation and extra bit rate for motion vectors. Experimental results show that this algorithm is more efficient than the conventional methods, especially for temporal activity regions.

关键词： Motion estimation algorithm Frame difference contrast Local variance contrast.

Emboli detection using the Doppler ultrasound technique

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声学技术 2003年第Z1期22卷 15-18页

作者： WANG Yuanyuan, CHEN Xi, zhang Yu, WANG Weiqi (department of electronic engineering, fudan university,shanghai 200433,china) department of electronic engineering Fudan University Shanghai 200433 China

Embolic detection is very important to the early diagnosis of vessel disease. The Doppler ultrasound technique is one of the common methods to detect the emboli non-invasively. When the emboli pass through the sample volume of the Doppler ultrasound instrument, there exist high intensity transient Doppler signals. Thus the emboli can be detected directly from the variation of Doppler signal amplitude. Since there may be some disturbance in the system, this general detection method has great limitation. To improve the accuracy of emboli auto-detection, several novel methods are studied to obtain the sensitive characteristic of the emboli signals using the new signal processing theories.

关键词： embolic signal,Doppler ultrasound,detection

Resting-state brain network remodeling after different nerve reconstruction surgeries:a functional magnetic resonance imaging study in brachial plexus injury rats

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Neural Regeneration Research 2025年第5期20卷 1495-1504页

作者： Yunting Xiang Xiangxin Xing Xuyun Hua Yuwen zhang Xin Xue jiajia Wu Mouxiong Zheng He Wang Jianguang Xu School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina department of Traumatology and Orthopedics Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(fudan university) Ministry of EducationShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Distinct brain remodeling has been found after different nerve reconstruction strategies,including motor representation of the affected ***,differences among reconstruction strategies at the brain network level have not been *** study aimed to explore intranetwork changes related to altered peripheral neural pathways after different nerve reconstruction surgeries,including nerve repair,endto-end nerve transfer,and end-to-side nerve ***–Dawley rats underwent complete left brachial plexus transection and were divided into four equal groups of eight:no nerve repair,grafted nerve repair,phrenic nerve end-to-end transfer,and end-to-side transfer with a graft sutured to the anterior upper ***-state brain functional magnetic resonance imaging was obtained 7 months after *** independent component analysis algorithm was utilized to identify group-level network components of interest and extract resting-state functional connectivity values of each voxel within the *** in intra-network resting-state functional connectivity were compared among the *** muscle reinnervation was assessed by behavioral observation(elbow flexion)and *** results showed that alterations in the sensorimotor and interoception networks were mostly related to changes in the peripheral neural *** repair was related to enhanced connectivity within the sensorimotor network,while end-to-side nerve transfer might be more beneficial for restoring control over the affected limb by the original motor *** thalamic-cortical pathway was enhanced within the interoception network after nerve repair and end-to-end nerve *** areas related to cognition and emotion were enhanced after end-to-side nerve *** study revealed important brain networks related to different nerve *** networks may be potential targets for enhancing motor recovery.

关键词： brain functional networks end-to-end nerve transfer end-to-side nerve transfer independent component analysis nerve repair peripheral plexus injury resting-state functional connectivity

低压下用CO+H_2气体制备人造金刚石的相图计算

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无机材料学报 1997年第3期12卷 331-335页

作者：张卫万永中王季陶复旦大学电子工程系上海200433

用非平衡热力学耦合模型计算了低压下由CO＋H2气体制备人造金刚石的相图．这些相图与经典的平衡热力学理论计算的相图不同，都有一个金刚石生长区．金刚石生长区的存在是实现用CO＋H2气体制备人造金刚石的热力学基础．本文认为相图中的... 详细信息

用非平衡热力学耦合模型计算了低压下由CO＋H2气体制备人造金刚石的相图．这些相图与经典的平衡热力学理论计算的相图不同，都有一个金刚石生长区．金刚石生长区的存在是实现用CO＋H2气体制备人造金刚石的热力学基础．本文认为相图中的金刚石生长区是体系中超平衡氢原子和超平衡氧原子对金刚石相和石墨相不同作用的结果．不同压力下相图中金刚石生长区的范围稍有不同，压力降低时，金刚石生长区将向低CO浓度的方向移动．本文还将计算的结果与报道的实验结果进行了对比分析，两者基本相符．

关键词：相图化学气相淀积低压人造金刚石氧化碳氢

Sound field of thermoacoustic tomography based on a modified finite-difference time-domain method

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Chinese Journal of Acoustics 2009年第3期28卷 209-219页

作者： zhang Chi WANG Yuanyuan department of electronic engineering Fudan University Shanghai 200433

A modified finite-difference time-domain （FDTD） method is proposed for the sound field simulation of the thermoacoustic tomography （TAT） in the acoustic speed inhomogeneous medium. First, the basic equations of the TAT are discretized to difference ones by the FDTD. Then the electromagnetic pulse, the excitation source of the TAT, is modified twice to eliminate the error introduced by high frequency electromagnetic waves. Computer simulations are carried out to validate this method. It is shown that the FDTD method has a better accuracy than the commonly used time-of-flight （TOF） method in the TAT with the inhomogeneous acoustic speed. The error of the FDTD is ten times smaller than that of the TOF in the simulation for the acoustic speed difference larger than 50%. So this FDTD method is an efficient one for the sound field simulation of the TAT and can provide the theoretical basis for the study of reconstruction algorithms of the TAT in the acoustic heterogeneous medium.

关键词： time FDTD Sound field of thermoacoustic tomography based on a modified finite-difference time-domain method

The Gaussian Sum Convolution Probability Hypothesis Density Filter

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The Gaussian Sum Convolution Probability Hypothesis Density ...

2008 9th International Conference on Signal Processing(ICSP’2008)

作者： Jian Jun Yin Jian Qiu zhang and Ze Sen Zhuang electronic engineering department fudan university shanghai 200433 china

A new multi-target tracking algorithm,termed as the Gaussian sum convolution probability hypothesis density（GSCPHD） filter,is *** filter is calculated by a bank of convolution filters with Gaussian approximations to the predicted and posterior *** is shown that the ability to deal with complex observation model,non or small observation noise of the GSCPHD over the Gaussian mixture particle PHD（GMPPHD） filter and the lower complexity,more amenable for parallel implementation than the convolution PHD（CPHD） *** illustration purposes,the tracking performance of the new filter is presented to compare with the existing GMPPHD filter.

关键词： signal processing nonlinear estimation Monte Carlo methods tracking

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人造金刚石低压气相生长的相图计算

物理学报 1997年第6期46卷 1237-1242页

作者：张卫王季陶万永中复旦大学电子工程系

用非平衡热力学耦合模型计算了由ＣＨ４／Ｈ２，ＣＯ／Ｈ２和乙炔火焰等气相体系生长金刚石的相图．与经典平衡热力学理论计算结果不同的是这些相图都有一个金刚石生长区存在．相图中的金刚石生长区是实现金刚石气相生长的热力学基础，... 详细信息

用非平衡热力学耦合模型计算了由ＣＨ４／Ｈ２，ＣＯ／Ｈ２和乙炔火焰等气相体系生长金刚石的相图．与经典平衡热力学理论计算结果不同的是这些相图都有一个金刚石生长区存在．相图中的金刚石生长区是实现金刚石气相生长的热力学基础，它的存在体现了超平衡氢原子等激活粒子对石墨的激活和对金刚石的稳定作用．计算的相图与报道的实验结果基本相符。

关键词：相图计算低压人造金刚石金刚石低压

DETECTION OF KNOWN SIGNALS IN 1/f FRACTAL NOISE

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Journal of electronics(china) 1999年第2期16卷 152-158页

作者： Xie Wenlu zhang Qianling(ASIC and Systems State Key Lab, fudan university, shanghai 200433)Chen Yanhui Xie Weixin(department of electronic engineering, Xidian university, Xi’an 710071)

Based on the whitening property of wavelet transformation for 1/f noise, this paper addresses the problem of detecting deterministic signals in the presence of 1/f fractal noise. The transfer function of whitening filter is provided as well as the condition for whitening. The receiver structure based on Karhunen-Loeve expansion and the decision rule are also given. Finally performance of the detector is analyzed.

关键词： Signal detection Fractal Wavelet analysis l/f-type signal