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2020 39th Chinese Control Conference (CCC)最新文献

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An Online sEMG Motion Classification Framework for Tele-operating the Robotic Hand 面向机械手远程操作的在线表面肌电信号运动分类框架
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188795
Haosi Zheng, H. Yokoi, Yinlai Jiang, Feng Duan
Seamless communication between human intended motions and robot actions is essential for Human-Robot Interaction (HRI). When tele-operating a robotic hand, it is a natural and effective way via surface electromyography (sEMG) signals. This paper proposes an online sEMG motion classification framework for tele-operating the robotic hand. The whole framework consists of offline training and online recognition phases. In the offline training phase, three features were selected from four candidates and Artificial Neural Network (ANN) won the election among three classifiers. Inthe online recognition phase, two-thresholds data segmentation and majority voting techniques were designed, and three subjects participated in online experiment to verify the feasibility of this framework. The online experimental results show that the average total accuracy is 73.56% and the average vote accuracy is 91.67%. The outcomes of this study have shown the promising potential of sEMG-based HRI.
人的预期动作和机器人的动作之间的无缝通信是人机交互(HRI)的关键。通过表面肌电信号对机械手进行远程操作是一种自然有效的方法。提出了一种用于机械手远程操作的在线表面肌电信号运动分类框架。整个框架由离线训练和在线识别两个阶段组成。在离线训练阶段,从4个候选分类器中选出3个特征,人工神经网络(ANN)在3个分类器中胜出。在在线识别阶段,设计了二阈值数据分割和多数投票技术,并通过三名受试者参与在线实验验证了该框架的可行性。在线实验结果表明,平均总准确率为73.56%,平均投票准确率为91.67%。这项研究的结果显示了基于表面肌电信号的HRI的巨大潜力。
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引用次数: 1
Covariance Intersection Kalman Fuser with Time-delayed Measurements 时滞测量的协方差交卡尔曼融合
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188776
Wenjuan Qi, Zunbing Sheng
For a two-sensor linear discrete time-invariant stochastic system with time-delayed measurements, by the measurement transformation method, an equivalent system without measurement delays is obtained, and then using the covariance intersection (CI) fusion method, the covariance intersection steady-state Kalman fuser is presented. It can handle the estimation fusion problem between local estimation errors for the system with unknown cross-covariances and avoid a large computed burden and computational complexity of cross-covariances. It is proved that its accuracy is higher than that of each local estimator, and is lower than that of optimal Kalman fuser weighted by matrices with known cross-covariances. A Monte-Carlo simulation example shows the above accuracy relation, and indicates that its actual accuracy is close to that of the Kalman fuser weighted by matrices, hence it has good performances.
对于具有时滞测量值的双传感器线性离散定常随机系统,通过测量变换方法得到了一个不存在测量延迟的等效系统,然后利用协方差交融合(CI)方法给出了协方差交稳态卡尔曼融合器。它可以处理未知交叉协方差系统的局部估计误差之间的估计融合问题,避免了大量的计算负担和交叉协方差的计算复杂度。证明了其精度高于各局部估计量,但低于由已知交叉协方差矩阵加权的最优卡尔曼融合器。通过蒙特卡罗仿真实例验证了上述精度关系,并表明其实际精度与矩阵加权卡尔曼融合器接近,具有良好的性能。
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引用次数: 1
Improving Multi-Speaker Tacotron with Speaker Gating Mechanisms 用扬声器门控机制改进多扬声器Tacotron
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188779
Wei Zhao, Li Xu, Ting He
In this paper, we present two speaker gating mechanisms for multi-speaker Tacotron, a popular end-to-end text-to- speech (TTS) neural system, to improve the performance of generating multiple voices. With our presented mechanisms, the model can work better in both generalization and accuracy. As a starting point, we introduce the original multi-speaker Tacotron as a baseline model because of its excellent performance and straightforward structure. Employing gated linear units (GLUs), two different speaker gating mechanisms are then proposed for this model. Extensive experiments on VCTK dataset are conducted to demonstrate the validity of our methods. Conclusively, we find that it is promising to incorporate the speaker identity information by using the proposed speaker gating mechanisms.
本文针对一种流行的端到端文本到语音(TTS)神经系统——多扬声器Tacotron,提出了两种扬声器门控机制,以提高生成多个语音的性能。利用我们提出的机制,模型在泛化和准确性方面都能取得更好的效果。作为起点,我们介绍了原始的多扬声器Tacotron作为基准模型,因为它具有出色的性能和简单的结构。采用门控线性单元(glu),针对该模型提出了两种不同的扬声器门控机制。在VCTK数据集上进行了大量的实验,以证明我们的方法的有效性。最后,我们发现使用所提出的说话人门控机制合并说话人身份信息是有希望的。
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引用次数: 1
The method on stacked particle image segmentation and particle size measurement 堆积粒子图像分割与粒度测量方法
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188955
Yong Li, Jun Xiao, Qidan Zhu
In the measurement of overlapping particle size, it is necessary to perform image processing on the stacked particle image to obtain accurate measurement results. In this paper morphological filtering is used to remove the isolated small area and fill the holes. The distance image combined with h-minima transform is used to get the seed points. Then the seed points and background are marked on the distance image. Finally, the distance image is segmented by watershed. Due to the partial missing after segmentation of conglutinated particles, according to the prior knowledge that the shape of particles is similar to ellipse, this paper reconstructs the contour of the incomplete particles by ellipse fitting technology. Finally, the measurement algorithm of particle shape and particle size characteristics is determined. Two groups experiments are carried out for particle size measurement, and the error of particle size measurement is analyzed. It is proved that the measurement is accurate.
在重叠粒度的测量中,需要对叠加的颗粒图像进行图像处理,以获得准确的测量结果。在本文中,形态学滤波用于去除孤立的小区域并填充孔洞。利用距离图像结合h-minima变换得到种子点。然后在距离图像上标记种子点和背景。最后,对距离图像进行分水岭分割。针对粘接粒子分割后部分缺失的问题,根据粒子形状近似于椭圆的先验知识,利用椭圆拟合技术重构不完整粒子的轮廓。最后,确定了颗粒形状和粒度特性的测量算法。进行了两组粒度测量实验,并对粒度测量误差进行了分析。结果表明,测量结果是准确的。
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引用次数: 0
Human Action prediction based on skeleton data 基于骨骼数据的人类行为预测
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9189122
Qipeng Zhang, Tian Wang, Huai‐Ning Wu, Mingmin Li, Jianpeng Zhu, H. Snoussi
Human behavior prediction is an interdisciplinary research direction, involving image processing, computer vision, pattern recognition, machine learning, and artificial intelligence, which is one of the important research topics in the field of computer vision. This paper introduces a model for predicting human skeletal motion sequence, which is composed of LSTM main network and structured prediction layer. We have verified its performance on h3.6m dataset, and this structure has achieved good results in the short-term prediction of human motion.
人类行为预测是一个跨学科的研究方向,涉及图像处理、计算机视觉、模式识别、机器学习、人工智能等,是计算机视觉领域的重要研究课题之一。本文介绍了一种由LSTM主网络和结构化预测层组成的人体骨骼运动序列预测模型。我们在h3.6m数据集上验证了其性能,该结构在人体运动的短期预测中取得了很好的效果。
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引用次数: 2
Discrete-Time H∞ Control for Infinite Markov Jump Systems with Uncertainty 不确定无限马尔可夫跳变系统的离散H∞控制
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9189135
Jing Hu, Yueying Liu, Xiaowei Gao, Hefeng Wu
This paper discusses the H∞ control problem for uncertain discrete-time infinite Markov jump systems. Firstly, some sufficient conditions for existence of state feedback H∞ controller are given to ensure that the closed-loop system is exponentially mean square stable with conditioning (EMSS-C) for the zero exogenous disturbance with H∞ performance level. Further, the backward iterative algorithm of four coupled matrix Riccati equations (CMREs) is presented to design H2/ H∞ controller. Finally, some numerical simulations are provided to show the applicability of developed approaches.
讨论了不确定离散无限马尔可夫跳变系统的H∞控制问题。首先,给出了状态反馈H∞控制器存在的充分条件,以保证闭环系统在具有H∞性能水平的零外源干扰下具有指数均方调节稳定(EMSS-C)。进一步,提出了四耦合矩阵Riccati方程(CMREs)的后向迭代算法来设计H2/ H∞控制器。最后,给出了一些数值模拟来证明所开发方法的适用性。
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引用次数: 0
A Novel Fuzzy Model Identification Approach Based on FCM and Gaussian Membership Function 一种基于FCM和高斯隶属函数的模糊模型识别新方法
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188699
Yaxue Ren, Jinfeng Lv, Fucai Liu
To solve the problem of fuzzy identification of nonlinear systems, a novel fuzzy identification method based on fuzzy c-means clustering (FCM) algorithm and Gaussian function is proposed. Firstly, fuzzy clustering algorithm is used to divide the input space to obtain the clustering center, then the clustering center is used as the gaussian function center to determine the membership function to obtain the premise parameters of the fuzzy model, and the conclusion parameters of the fuzzy model are identified by recursive least squares (RLS). Finally, three simulation examples are given to verify the effectiveness of the proposed method in identifying T-S fuzzy model.
为了解决非线性系统的模糊辨识问题,提出了一种基于模糊c均值聚类(FCM)算法和高斯函数的模糊辨识方法。首先利用模糊聚类算法对输入空间进行划分得到聚类中心,然后将聚类中心作为高斯函数中心确定隶属函数,得到模糊模型的前提参数,最后利用递推最小二乘(RLS)对模糊模型的结论参数进行识别。最后,给出了三个仿真实例,验证了该方法在T-S模糊模型识别中的有效性。
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引用次数: 1
An ELM-based Deep SDAE Ensemble for Inter-Subject Cognitive Workload Estimation with Physiological Signals 基于elm的深度SDAE集成在主体间认知负荷估计中的应用
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9188806
Zhanpeng Zheng, Zhong Yin, Jianhua Zhang
Evaluating operator cognitive workload (CW) levels in human-machine systems based on neurophysiological signals is becoming the basis to prevent serious accidents due to abnormal state of human operators. This study proposes an inter-subject CW classifier, extreme learning machine (ELM)-based deep stacked denoising autoencoder ensemble (ED-SDAE), to adapt the variations of the electroencephalogram (EEG) feature distributions across different subjects. The ED-SDAE consists of two cascade-connected modules, which are termed as high level personalized feature abstractions and abstraction fusion. The combination of SDAE and locality preserving projection (LPP) technique is regarded as base learner to obtain ensemble members for training meta-classifier by stacking-based approach. The ELM model with Q-statistics diversity measurement is acted as meta-classifier to fuse above inputs to improve classification performance. The feasibility of the SD-SDAE is tested by two EEG databases. The multi-class classification rate achieves 0.6353 and 0.6747 for T1 and T2 respectively, and significantly outperforms several shallow and deep CW estimators. By computing the main time complexity, the computational workload of the ED-SDAE is also acceptable for high-dimensional EEG features.
基于神经生理信号评价人机系统中操作人员的认知负荷水平,正成为预防操作人员异常状态引起的重大事故的基础。本文提出了一种基于极限学习机(ELM)的深度堆叠去噪自编码器集成(ED-SDAE)的学科间连续波分类器,以适应不同学科间脑电图(EEG)特征分布的变化。ED-SDAE由两个级联模块组成,分别是高级个性化特征抽象和抽象融合。将SDAE与局域保持投影(locality preserving projection, LPP)技术相结合作为基础学习器,通过基于堆叠的方法获得集合成员,用于训练元分类器。采用q统计多样性度量的ELM模型作为元分类器,融合以上输入,提高分类性能。通过两个脑电数据库对SD-SDAE的可行性进行了验证。T1和T2的多类分类率分别达到0.6353和0.6747,显著优于几种浅层和深层CW估计器。通过计算主时间复杂度,ED-SDAE的计算量对于高维脑电特征也是可以接受的。
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引用次数: 0
An Improved Sobel Face Gray Image Edge Detection Algorithm 一种改进的Sobel人脸灰度图像边缘检测算法
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9189302
Xiaolin Tang, Xiaogang Wang, Jin Hou, Huafeng Wu, Dan Liu
In this paper, an improved Sobel edge detection algorithm is proposed to overcome the shortcomings of traditional Sobel edge detection operators, such as the limitation of detection direction in horizontal and vertical directions, and the need to set detection threshold artificially. Firstly, the detection direction is improved, based on the horizontal and vertical detection directions, two directions of 45 degree and 135 degree are added, which can detect the edge information of multiple gradient directions of the image. Secondly, considering the overall and local gray level of the input image, an edge judgment threshold is adaptively generated to make the detected image edge more complete. Finally, the multi-directional detection and adaptive threshold generation are combined. The experimental results show that the improved Sobel edge detection algorithm can extract more direction edge information, and the edge boundary is clear, which has better robustness to noise interference.
本文提出了一种改进的Sobel边缘检测算法,克服了传统Sobel边缘检测算子在水平方向和垂直方向上检测方向受限、需要人为设置检测阈值等缺点。首先对检测方向进行改进,在水平和垂直检测方向的基础上,增加45度和135度两个方向,可以检测图像多个梯度方向的边缘信息;其次,考虑输入图像的整体灰度和局部灰度,自适应生成边缘判断阈值,使检测到的图像边缘更加完整;最后,将多方向检测与自适应阈值生成相结合。实验结果表明,改进的Sobel边缘检测算法可以提取更多的方向边缘信息,边缘边界清晰,对噪声干扰具有更好的鲁棒性。
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引用次数: 9
Circuit Design of Moving Object Recognition System 运动物体识别系统的电路设计
Pub Date : 2020-07-01 DOI: 10.23919/CCC50068.2020.9189056
Dan Shan, Xiaoxu Zhang, W. Lu
The traditional moving object recognition and tracking systems are usually based on software environment of PC, so the performance of processing speed, real-time and the size have limitations. In view of this, the circuit design based on Field Programmable Gate Array(FPGA) is proposed, which improves the performance of processing speed and real-time and miniaturization. Aiming at the recognition, tracking and feature point extraction of moving object, 300,000 pixel camera is used for image acquisition, and hardware circuit is used for image processing, including real-time image caching, gray-scale processing, improved bit plane median filtering, segmentation of self-adaptive threshold binarizing, fusing of frame difference and background difference methods for moving object detecting, tracking and feature point extracting. Finally, the recognition results are displayed by HDMI interface displayer. The design takes full advantage of the high-speed and parallel processing ability of FPGA, and combines the high-speed on-chip RAM with the large capacity off-chip SDRAM to realize the processing and storage of video data. After written by Verilog HDL and verified by Modelsim, the physical circuit is implemented in FPGA. This system has the characteristics of strong anti-interference, compact, flexibility, high speed, low power consumption, versatility and scalability, which is suitable for both industrial field and home use.
传统的运动目标识别与跟踪系统通常是基于PC机的软件环境,因此在处理速度、实时性和尺寸等性能上存在局限性。鉴于此,提出了基于现场可编程门阵列(FPGA)的电路设计,提高了处理速度、实时性和小型化的性能。针对运动目标的识别、跟踪和特征点提取,采用30万像素相机进行图像采集,采用硬件电路进行图像处理,包括实时图像缓存、灰度处理、改进位平面中值滤波、自适应阈值二值化分割、帧差和背景差融合等方法进行运动目标检测、跟踪和特征点提取。最后通过HDMI接口显示器显示识别结果。本设计充分利用FPGA的高速并行处理能力,将高速片上RAM与大容量片外SDRAM相结合,实现视频数据的处理和存储。经Verilog HDL编写,Modelsim验证后,在FPGA上实现了物理电路。该系统具有抗干扰性强、结构紧凑、灵活、速度快、功耗低、通用性强、可扩展性强等特点,适用于工业现场和家庭使用。
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引用次数: 0
期刊
2020 39th Chinese Control Conference (CCC)
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