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2013 IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement Systems and Applications (CIVEMSA)最新文献

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A fuzzy model relating vibrotactile signal characteristics to haptic sensory evaluations 振动触觉信号特征与触觉感官评价的模糊模型
Liviu-Cristian Duţu, G. Mauris, P. Bolon, Stéphanie Dabic, J. Tissot
Nowadays tactile surfaces are slowly replacing the mechanical interfaces of our electronic devices, and the actual trend is toward a quasi-total touch interaction. This transition has however one important side effect, i.e the lack of feedback from the device, which in certain situations can be crucial. In order to overcome this, it has been suggested that feedback has to be delivered to the finger through vibrations that should be both detectable and comfortable. This paper aims to define a perception model for the sensory evaluations of the vibrotactile signals using fuzzy set theory. First of all, the hypothesis that haptic perception is strongly related to physical characteristics of the signals was evaluated and confirmed with a 93% correlation rate, based on psychophysical studies of the tactile sense. Secondly, using the previous analysis as a knowledge base we have implemented a fuzzy inference system which forecasts the preference values for vibrotactile signals. The preliminary results show that for 15 out of 18 signals, the preference is correctly predicted within a reasonable uncertainty interval.
如今,触觉表面正在慢慢取代我们电子设备的机械界面,而实际的趋势是走向准全触摸交互。然而,这种转变有一个重要的副作用,即缺乏来自设备的反馈,这在某些情况下可能是至关重要的。为了克服这个问题,有人建议,必须通过既可检测又舒适的振动将反馈传递给手指。本文旨在利用模糊集理论建立一个振动触觉信号感官评价的感知模型。首先,基于触觉的心理物理研究,以93%的相关率评估并证实了触觉感知与信号的物理特征密切相关的假设。其次,在前人分析的基础上,我们实现了一个模糊推理系统来预测振动触觉信号的偏好值。初步结果表明,对18个信号中的15个,在合理的不确定区间内正确预测了偏好。
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引用次数: 7
Automatic ECG artifact removal in the real-time SEMG recording system 实时表面肌电信号记录系统中心电伪影的自动去除
Yong Hu, Jerry Kwok, J. Tse
The contaminated electrocardiography (ECG) is a big problem in the surface electromyography (SEMG) signal detection and analysis. The objective of the current study is to propose and validate an algorithm for the automated feature cognition and identification for eliminating ECG artifact from the raw SEMG signals. The utilization of Independent Component Analysis (ICA) method is to decompose the raw SEMG signals into individual independent source components. After that, some of the independent source components with the characteristics of ECG artifact were detected by the automated identification algorithm and thereafter eliminated. The sensitivity and specificity of the algorithm for distinguishing ECG source components from independent source components are 100% and 99% respectively. The automated identification algorithm exhibits the prominent performance of recognition for ECG artifact and can be considered reliable and effective.
心电图污染是肌表电信号检测与分析中的一大难题。本研究的目的是提出并验证一种从原始表面肌电信号中消除心电伪影的自动特征认知和识别算法。利用独立分量分析(ICA)方法将原始表面肌电信号分解成独立的源分量。然后,通过自动识别算法检测出一些具有心电伪影特征的独立源分量,然后剔除。该算法区分心电源分量和独立源分量的灵敏度和特异性分别为100%和99%。该自动识别算法对心电伪信号的识别性能突出,可以认为是可靠有效的。
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引用次数: 0
An infrared-based depth camera for gesture-based control of virtual environments 一种用于虚拟环境手势控制的红外深度相机
D. Ionescu, V. Suse, C. Gadea, B. Solomon, B. Ionescu, S. Islam
Gesture Control dominates presently the research on new human computer interfaces. The domain covers both the sensors to capture gestures and also the driver software which interprets the gesture mapping it onto a robust command. More recently, there is a trend to use depth-mapping camera as the 2D cameras fall short in assuring the conditions of real-time robustness of the whole system. As image processing is at the core of the detection, recognition, and tracking the gesture, depth mapping sensors have to provide a depth image insensitive to illumination conditions. Thus depth-mapping cameras work in a certain wavelength of the infrared (IR) spectrum. In this paper, a novel real-time depth-mapping principle for an IR camera is introduced. The new IR camera architecture comprises an illuminator module which is pulse-modulated via a monotonic function using a cycle driven feedback loop for the control of laser intensity, while the reflected infrared light is captured in “slices” of the space in which the object of interest is situated. A reconfigurable hardware architecture unit calculates the depth slices and combines them in a depth-map of the object to be further used in the detection, tracking, and recognition of the gesture made by the user. Images of real objects are reconstructed in 3D based on the data obtained by the space-slicing technique, and a corresponding image processing algorithm builds the 3D map of the object in real-time. As this paper will show through a series of experiments, the camera can be used in a variety of domains, including for gesture control of 3D objects in virtual environments.
手势控制是目前新型人机界面研究的主流。该领域既包括捕捉手势的传感器,也包括解释手势并将其映射到鲁棒命令的驱动软件。最近,由于2D摄像机在保证整个系统的实时鲁棒性条件方面存在不足,因此有使用深度映射相机的趋势。由于图像处理是手势检测、识别和跟踪的核心,因此深度映射传感器必须提供对光照条件不敏感的深度图像。因此,深度映射相机在特定波长的红外光谱中工作。本文介绍了一种新的红外相机实时深度映射原理。新的红外相机架构包括一个照明模块,该模块通过一个单调函数进行脉冲调制,使用周期驱动的反馈回路来控制激光强度,而反射的红外光被捕获在感兴趣的物体所在空间的“切片”中。可重新配置的硬件架构单元计算深度切片,并将它们组合在对象的深度图中,以进一步用于检测、跟踪和识别用户所做的手势。利用空间切片技术获取的数据对真实物体进行三维图像重构,并通过相应的图像处理算法实时构建物体的三维地图。正如本文将通过一系列实验展示的那样,该相机可以用于各种领域,包括虚拟环境中3D物体的手势控制。
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引用次数: 6
Ensemble learning of colorectal cancer survival rates 结直肠癌生存率的集成学习
C. Roadknight, U. Aickelin, J. Scholefield, L. Durrant
In this paper, we describe a dataset relating to cellular and physical conditions of patients who are operated upon to remove colorectal tumours. This data provides a unique insight into immunological status at the point of tumour removal, tumour classification and post-operative survival. We build on existing research on clustering and machine learning facets of this data to demonstrate a role for an ensemble approach to highlighting patients with clearer prognosis parameters. Results for survival prediction using 3 different approaches are shown for a subset of the data which is most difficult to model. The performance of each model individually is compared with subsets of the data where some agreement is reached for multiple models. Significant improvements in model accuracy on an unseen test set can be achieved for patients where agreement between models is achieved.
在本文中,我们描述了一个与手术切除结肠直肠肿瘤的患者的细胞和身体状况相关的数据集。该数据为肿瘤切除、肿瘤分类和术后生存的免疫状态提供了独特的见解。我们建立在现有的数据聚类和机器学习方面的研究基础上,以证明集成方法在突出具有更清晰预后参数的患者方面的作用。对于最难建模的数据子集,显示了使用3种不同方法的生存预测结果。将每个模型的性能单独与多个模型达到某种一致的数据子集进行比较。对于模型之间达成一致的患者,可以在未见的测试集上实现模型精度的显着改进。
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引用次数: 3
A virtual environment for the simulation of 3D wood strands in multiple view systems for the particle size measurements 在多视图系统中模拟三维木链的虚拟环境,用于粒度测量
R. D. Labati, A. Genovese, V. Piuri, F. Scotti
In this paper, we present a complete virtual environment for the computation of synthetic three-dimensional samples representing free falling wood strands.The proposed method permits to simulate acquisitions performed by real multiple view setups in which the stream of strands falling out of a conveyor belt is analyzed with image processing techniques in order to compute the particle size distribution. Unfortunately, experiments in real time applications are complex and expensive, and the ground true is almost impossible to measure in such conditions. The creation of a metric and fully virtual environment of falling wood strands represent a key feature in order to properly design the illuminotecnic and optical setups, optimize the image processing methods as well as the three- dimensional reconstruction techniques, using controlled and fully repeatable virtual image datasets.
在本文中,我们提出了一个完整的虚拟环境,用于计算代表自由下落的木股的合成三维样本。所提出的方法允许模拟由真实的多视图设置执行的采集,其中用图像处理技术分析从传送带中掉落的股流,以计算粒度分布。不幸的是,实时应用中的实验既复杂又昂贵,而且在这种条件下几乎不可能测量地面真实。为了正确设计照明技术和光学设置,优化图像处理方法以及三维重建技术,使用受控和完全可重复的虚拟图像数据集,创建一个度量和完全虚拟的木材链环境是一个关键特征。
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引用次数: 5
An empirical study based on a fuzzy logic system to assess the QoS/QoE correlation for layered video streaming 基于模糊逻辑系统评价分层视频流QoS/QoE相关性的实证研究
M. Alreshoodi, J. Woods
A model that can predict an end user satisfaction or QoE (Quality of Experience) directly from the network QoS (Quality of Service) is still illusive in the field of image processing and is completely absent in multi-layered video. This motivates the derivation of a meaningful QoS to QoE mapping function to allow one to be predicted in the absence of the other. This paper presents an affine fuzzy logic based system that can map the QoS to QoE and can be extended to layered video streaming. The proposed methodology employs a learning system which optimizes the coded layered video for best QoE. Four QoS parameters are chosen as the inputs of the designed model, while the output is the Peak Signal-to-Noise Ratio (PSNR). The designed membership functions and the fuzzy rules extracted from the input and the output enable the proposed model to identify and learn the video QoE.
直接从网络服务质量(QoS)预测最终用户满意度或QoE(体验质量)的模型在图像处理领域仍然是虚幻的,在多层视频中是完全不存在的。这激发了对有意义的QoS到QoE映射函数的推导,以允许在没有另一个的情况下预测其中一个。本文提出了一种基于仿射模糊逻辑的系统,该系统可以将QoS映射到QoE,并可以扩展到分层视频流。所提出的方法采用了一个学习系统,该系统优化编码分层视频以获得最佳QoE。选择4个QoS参数作为所设计模型的输入,输出为峰值信噪比(PSNR)。设计的隶属函数和从输入输出中提取的模糊规则使该模型能够识别和学习视频QoE。
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引用次数: 20
Development of a low cost dataglove based on arduino for virtual reality applications 基于arduino的低成本虚拟现实应用数据采集器的开发
Lucas Silva, R. Dantas, Andre L. H. Pantoja, Antonio Pereira
This article describes the first steps on the development of a low cost dataglove based on the Arduino Uno microprocessor. The glove is designed for use in virtual reality systems and is integrated into a suite of applications. This article also presents a set of preliminary results obtained with the glove and discuss about the use of the glove to control a video game application for rehabilitation of stroke patients.
本文介绍了开发基于Arduino Uno微处理器的低成本数据处理器的第一步。该手套专为虚拟现实系统而设计,并集成到一套应用程序中。本文还介绍了一组使用该手套获得的初步结果,并讨论了使用该手套控制脑卒中患者康复的视频游戏应用程序。
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引用次数: 13
Sensor fault detection and diagnosis based on SOMNNs for steady-state and transient operation 基于somnn的传感器稳态和暂态故障检测与诊断
Yu Zhang, C. Bingham, M. Gallimore, Zhijing Yang, Jun Chen
The paper presents a readily implementable approach for sensor fault detection, identification (SFD/I) and faulted sensor data reconstruction in complex systems based on self-organizing map neural networks (SOMNNs). Two operational regimes are considered, i.e. the steady operation and operation with transients. For steady operation, SOMNN based estimation error (EE) are used for SFD. EE contribution plots are employed for SFI. For operation with transients, SOMNN classification maps are used for SFD/I comparing with the `fingerprint' maps. In addition, extension algorithm of SOMNNs is developed for faulted sensor data reconstruction. The validation of the proposed approach is demonstrated through experimental data during the commissioning of industrial gas turbines.
本文提出了一种基于自组织映射神经网络(SOMNNs)的复杂系统传感器故障检测、识别(SFD/I)和故障传感器数据重建方法。考虑了两种运行状态,即稳定运行和有暂态运行。为了稳定运行,采用基于SOMNN的估计误差(EE)方法进行SFD。SFI采用EE贡献图。对于瞬态操作,将SOMNN分类图用于SFD/I,与“指纹”图进行比较。此外,针对故障传感器数据重构问题,提出了somnn的扩展算法。通过工业燃气轮机调试过程中的实验数据验证了该方法的有效性。
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引用次数: 4
An efficient comparative machine learning-based metagenomics binning technique via using Random forest 基于随机森林的高效比较机器学习元基因组分拆技术
Helal Saghir, D. Megherbi
Metagenomics is the study of microorganisms collected directly from natural environments. Metagenomics studies use DNA fragments obtained directly from a natural environment using whole genome shotgun (WGS) sequencing. Sequencing random fragments obtained from whole genome shotgun into taxa-based groups is known as binning. Currently, there are two different methods of binning: sequence similarity methods and sequence composition methods. Sequence similarity methods are usually based on sequence alignment to known genome like BLAST, or MEGAN. As only a very small fraction of species is available in the current databases, similarity methods do not yield good results. As a given database of organisms grows, the complexity of the search will also grow. Sequence composition methods are based on compositional features of a given DNA sequence like K-mers, or other genomic signature(s). Most of these current methods for binning have two major issues: they do not work well with short sequences and closely related genomes. In this paper we propose new machine learning related predictive DNA sequence feature selection algorithms to solve binning problems in more accurate and efficient ways. In this work we use Oligonucleotide frequencies from 2-mers to 4-mers as features to differentiate between sequences. 2-mers produces 16 features, 3-mers produces 64 features and 4-mers produces 256 features. We did not use feature higher than 4-mers as the number of feature increases exponentially and for 5-mers the number of feature would be 1024 features. We found out that the 4-mers produces better results than 2-mers and 3-mers. The data used in this work has an average length of 250, 500, 1000, and 2000 base pairs. Experimental results of the proposed algorithms are presented to show the potential value of the proposed methods. The proposed algorithm accuracy is tested on a variety of data sets and the classification/prediction accuracy achieved is between 78% - 99% for various simulated data sets using Random forest classifier and 37% - 95% using Naïve Bayes classifier. Random forest Classifier did better in classification in all the dataset compared to Naïve Bayes.
宏基因组学是对直接从自然环境中收集的微生物的研究。宏基因组学研究使用全基因组霰弹枪(WGS)测序直接从自然环境中获得的DNA片段。将从全基因组中获得的随机片段排序为基于分类的组,称为分箱。目前,有两种不同的分类方法:序列相似法和序列组合法。序列相似性方法通常基于与已知基因组(如BLAST或MEGAN)的序列比对。由于目前数据库中只有很小一部分物种可用,相似性方法不能产生很好的结果。随着给定生物数据库的增长,搜索的复杂性也会增加。序列组成方法基于给定DNA序列的组成特征,如K-mers或其他基因组特征。目前大多数的分类方法都有两个主要问题:它们不能很好地处理短序列和密切相关的基因组。在本文中,我们提出了新的机器学习相关的预测DNA序列特征选择算法,以更准确和有效的方式解决分箱问题。在这项工作中,我们使用从2-mers到4-mers的寡核苷酸频率作为区分序列的特征。2-mers产生16个特征,3-mers产生64个特征,4-mers产生256个特征。我们没有使用高于4-mers的特征,因为特征数量呈指数增长,而对于5-mers,特征数量将达到1024个。我们发现4-mers比2-mers和3-mers产生更好的效果。本工作中使用的数据平均长度为250、500、1000和2000个碱基对。实验结果表明了所提算法的潜在价值。本文算法在多种数据集上进行了精度测试,使用随机森林分类器对各种模拟数据集的分类/预测精度在78% ~ 99%之间,使用Naïve贝叶斯分类器的分类/预测精度在37% ~ 95%之间。与Naïve贝叶斯相比,随机森林分类器在所有数据集上的分类效果都更好。
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引用次数: 8
Low-cost neuro-fuzzy control solution for servo systems with variable parameters 变参数伺服系统的低成本神经模糊控制方法
A. Stînean, S. Preitl, R. Precup, C. Dragos, M. Radac, E. Petriu
This paper treats the design and implementation of a low-cost neuro-fuzzy control solution for a class of servo systems with an integral component and variable parameters. A hybrid Takagi-Sugeno PI-neuro-fuzzy controller (T-S PI-N-FC) is proposed and presented along with its relatively simple design approach. The solution carries out the on-line adaptation of a single parameter of the input membership functions of a Takagi-Sugeno PI-fuzzy controller with input integration (T-S PI-FC-II) by a single neuron trained by back propagation with momentum factor in the framework of a model reference adaptive controller structure. The second parameter of the input membership functions is tuned by the modal equivalence principle. Linear matrix inequalities are proposed as sufficient stability conditions to be fulfilled by the parameters of the rule consequents of the T-S PI-FC-II in order to guarantee the stable design of the hybrid T-S PI-N-FC. The solution is validated by a case study using a set of three process parameters that correspond to a strip winding system laboratory equipment. Digital simulation results and experimental results are given.
本文研究一类具有整元变参数的伺服系统的低成本神经模糊控制方案的设计与实现。提出了一种混合Takagi-Sugeno pi -神经模糊控制器(T-S PI-N-FC),并给出了其相对简单的设计方法。该方案实现了在模型参考自适应控制器结构框架内,通过带动量因子的反向传播训练的单个神经元在线自适应具有输入积分的Takagi-Sugeno pi -模糊控制器(T-S PI-FC-II)的单个参数的输入隶属度函数。输入隶属函数的第二个参数采用模态等效原理进行调谐。提出了线性矩阵不等式作为T-S PI-FC-II规则结果参数满足的充分稳定性条件,以保证混合T-S PI-N-FC的稳定设计。该解决方案通过一个案例研究进行了验证,该研究使用了一组三个工艺参数,这些参数对应于条带缠绕系统的实验室设备。给出了数字仿真结果和实验结果。
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引用次数: 7
期刊
2013 IEEE International Conference on Computational Intelligence and Virtual Environments for Measurement Systems and Applications (CIVEMSA)
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