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2011 IEEE International Conference on Computational Intelligence for Measurement Systems and Applications (CIMSA) Proceedings最新文献

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Genetic algorithm based efficient tag detection in RFID reader networks 基于遗传算法的RFID读写器网络高效标签检测
N. Irfan, M. Yagoub, K. Hettak
Radio Frequency Identification (RFID) systems, due to recent technological advances, have been used for various advantages in industry like production facilities, supply chain management etc. However, sometimes this requires a dense deployment of readers to cover the working area. Without optimizing reader's location and number, many of them will be redundant, reducing the efficiency of the whole RFID system. There are many algorithms proposed to solve this redundant reader problem, but all existing algorithms are based on omnidirectional reader antenna pattern, which is not practical. In this paper, a genetic algorithm is used to optimize the antenna beam to eliminate redundant reader based on real directional reader antenna pattern.
射频识别(RFID)系统,由于最近的技术进步,已用于各种优势的行业,如生产设施,供应链管理等。然而,有时这需要密集地部署读取器以覆盖工作区域。如果不优化阅读器的位置和数量,许多阅读器将是多余的,从而降低整个RFID系统的效率。针对这一冗余读取器问题提出了许多算法,但现有的算法都是基于全向读取器天线方向图,不具有实用性。本文基于实际定向阅读器天线方向图,采用遗传算法对天线波束进行优化,消除冗余阅读器。
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引用次数: 2
Personal dosimeter for the measurement of artificial optical radiation (AOR) exposure 用于测量人工光辐射(AOR)照射的个人剂量计
Alessandro Quarto, V. Di Lecce, R. Dario, J. Uva
The Italian Legislative Decree dated April 26, 2010 no. 81/08 also refers to the European directive no. 2006/25/EC on the limit values for the exposure of workers to artificial optical radiation (AOR). The main damages caused by higher exposure to AOR regard in particular eyes and all of the body (e.g. skin). Recent studies concern the health effects on retinal photoreceptors after exposure to wavelength range between 380 nm and 500 nm, named "blue light”. The aim of this paper is to present an innovative personal dosimeter for AOR detection. The proposed system can be used not only for evaluating AOR, but also providing the operator's position and attitude in relation to the natural or artificial source of radiation. The acquired Data are then processed by a Fuzzy Inference System (FIS). The FIS main target is the accurate evaluation of risk levels associated to each light radiation striking the operator's retina.
2010年4月26日意大利立法法令81/08也指欧洲第81/08号指令。2006/25/EC关于工人接触人工光辐射(AOR)的极限值。高暴露于AOR造成的主要损害,特别是眼睛和全身(如皮肤)。最近的研究关注的是暴露在波长在380纳米到500纳米之间的“蓝光”下对视网膜感光器的健康影响。本文的目的是提出一种用于AOR检测的创新个人剂量计。所提出的系统不仅可以用于评估AOR,还可以提供操作员与自然或人工辐射源相关的位置和姿态。然后用模糊推理系统(FIS)对采集的数据进行处理。FIS的主要目标是准确评估与每次照射到操作者视网膜的光辐射相关的风险水平。
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引用次数: 2
Networking logistic neurons can yield chaotic and pattern recognition properties 网络逻辑神经元可以产生混沌和模式识别特性
Ke Qin, B. Oommen
Over the last few years, the field of Chaotic Neural Networks (CNNs) has been extensively studied because of their potential applications in the understanding/recognition of patterns and images, their associative memory properties, their relationship to complex dynamic system control, and their capabilities in the modeling and analysis of other measurement systems. However, the results concerning CNNs which can demonstrate chaos, quasi-chaos, Associative Memory (AM), and Pattern Recognition (PR) are scanty. In this paper, we consider the consequences of networking a set of Logistic Neurons (LNs). By appropriately defining the input/output characteristics of a fully connected network of LNs, and by defining their set of weights and output functions, we have succeeded in designing a Logistic Neural Network (LNN) possessing some of these properties. The chaotic properties of a single-neuron have been formally proven, and those of the entire network have also been alluded to. Indeed, by appropriately setting the parameters of the LNN, we show that the LNN can yield AM, chaotic and PR properties for different settings. As far as we know, the results presented here are novel, and the chaotic PR properties of such a network are unreported.
在过去的几年中,混沌神经网络(cnn)领域由于其在模式和图像的理解/识别、联想记忆特性、与复杂动态系统控制的关系以及在其他测量系统的建模和分析方面的潜在应用而得到了广泛的研究。然而,关于cnn可以证明混沌、准混沌、联想记忆(AM)和模式识别(PR)的结果却很少。在本文中,我们考虑了一组逻辑神经元(LNs)联网的结果。通过适当地定义一个完全连接的LNs网络的输入/输出特性,并通过定义它们的权重和输出函数集,我们成功地设计了一个具有这些特性的逻辑神经网络(LNN)。单个神经元的混沌性质已被正式证明,整个网络的混沌性质也已被提及。事实上,通过适当设置LNN的参数,我们表明LNN可以在不同的设置下产生AM,混沌和PR属性。据我们所知,这里提出的结果是新颖的,并且这种网络的混沌PR特性尚未报道。
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引用次数: 5
Experimental validation of recurrent Neuro-Fuzzy Networks for AFR estimation and control in SI engines 循环神经模糊网络用于发动机AFR估计和控制的实验验证
F. Barghi, A. Safavi
An accurate model of Air to Fuel Ratio (AFR) dynamics is critical for high-quality AFR control in SI engines. These modeling and control problems are very sensitive because the dynamics of intake manifold air-fuel flow is severely nonlinear and multivariable. This study focuses on Recurrent Neuro-Fuzzy Network (RNFN) estimation and control of AFR nonlinear dynamics in SI engines. First, a nonlinear autoregressive with exogenous inputs (NARX) model is chosen for modeling the AFR nonlinear dynamics in the fuel injection system. Then, the strategy based on RNFN, is employed to fine-tune the model parameters. A controller is also designed based on inverse model-based method. The objective of control scheme is to keep the AFR constraint conditions by providing the proper fuel injection commands. This strategy is performed on an informative data-set obtained by a real-time in-vehicle experimental test. The effectiveness of the proposed approach is evaluated and validated by the resulting improvement in comparison with ECU performance.
准确的空气燃料比(AFR)动力学模型对于高质量的发动机AFR控制至关重要。由于进气歧管空气-燃料流动的动力学是严重非线性和多变量的,这些建模和控制问题是非常敏感的。本文主要研究了循环神经模糊网络(RNFN)对发动机AFR非线性动力学的估计和控制。首先,采用带有外生输入的非线性自回归模型(NARX)对燃油喷射系统的AFR非线性动力学进行建模。然后,采用基于RNFN的策略对模型参数进行微调。设计了基于逆模型的控制器。控制方案的目标是通过提供适当的燃油喷射指令来保持AFR约束条件。该策略是在实时车载实验测试获得的信息数据集上执行的。通过与ECU性能的比较,对所提出方法的有效性进行了评估和验证。
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引用次数: 2
A Gaussian radial basis function based feature selection algorithm 一种基于高斯径向基函数的特征选择算法
Zhiliang Liu, M. Zuo, Hongbing Xu
Recently Li et al. proposed a parameter selection method for Gaussian radial basis function (GRBF) in support vector machine (SVM). In his paper cosine similarity was calculated between two vectors based on the properties of GRBF kernel function. Li's method can determine an optimal sigma in SVM and thus efficiently improve its performance, yet it is limited by only focusing on a fixed original feature space and may suffer if the space contains some irrelevant and redundant features, especially in a high-dimensional feature space. In this paper, Li's method is extended to a flexible feature space so that feature selection and parameter selection are conducted at the same time. A feature subset and sigma are determined by minimizing the objective function that considers both within-class and between-class cosine similarities. Our experimental results demonstrate that the proposed method has a better performance than Li's method and traditional SVM in terms of classification accuracy.
最近Li等人提出了一种支持向量机(SVM)中高斯径向基函数(GRBF)的参数选择方法。本文基于GRBF核函数的性质计算了两个向量之间的余弦相似度。Li的方法可以确定支持向量机的最优sigma,从而有效地提高了支持向量机的性能,但它只关注一个固定的原始特征空间,如果空间中包含一些不相关和冗余的特征,特别是在高维特征空间中,可能会受到影响。本文将Li的方法扩展到一个灵活的特征空间,使特征选择和参数选择同时进行。通过最小化考虑类内和类间余弦相似度的目标函数来确定特征子集和sigma。实验结果表明,该方法在分类精度上优于Li的方法和传统的SVM。
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引用次数: 13
Discriminating gaseous emission patterns in low-cost sensor setups 鉴别低成本传感器装置中的气体排放模式
V. Di Lecce, M. Calabrese
This work presents a two-step heuristic that employs extremely low-cost sensors for gaseous emission event discrimination. These events are triggered by particular patterns of sensor responses possibly occurring when a certain gas is emitted; patterns are then used to produce human-understandable inference rules describing the kind of emission measured. The technique, challenged by the high cross-sensitivity of the employed sensors, is based on two steps: first, sensor response patterns are extracted (unsupervisedly) from measurement signals by means of a recently proposed computational intelligence technique; second, a ‘credibility index’ is applied (supervisedly) to each pattern via fuzzy membership functions. The outcome is a set of IF THEN statements weighted by fuzzy constraints. Experiments show that such inferences allow for accurate gaseous emission event discrimination.
本文提出了一种采用极低成本传感器进行气体排放事件判别的两步启发式算法。这些事件是由某些气体排放时可能发生的传感器响应的特定模式触发的;然后使用模式来产生人类可理解的推理规则,描述所测量的排放类型。针对传感器交叉灵敏度高的问题,该技术主要分为两步:首先,利用最近提出的计算智能技术从测量信号中(无监督地)提取传感器响应模式;其次,通过模糊隶属函数将“可信度指标”(监督地)应用于每个模式。结果是一组由模糊约束加权的IF THEN语句。实验表明,这种推断允许精确的气体发射事件判别。
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引用次数: 9
Research on nonlinear control methods for on-orbit servicing with visual positioning system 基于视觉定位的在轨服务非线性控制方法研究
Weiwei Yang, Yong Zhao, Yiyong Huang, Xiaoqian Chen, Zhenguo Wang
A new laboratory test bed of on-orbit servicing system is introduced that enables simulation of the autonomous approach and docking of a chaser spacecraft to a target spacecraft with similar mass. The test bed system consists of a chaser and a target spacecraft simulator floating via air pads on a marble platform. Relative navigation of the chaser spacecraft is obtained by the united measurements with a single-camera visual sensor and IMU, through Kalman filters. Six cold-gas on-off thrusters and a flywheel are used for the translation and rotation of the chaser simulator. Considering the uncertainties in model, two nonlinear control algorithms, sliding mode control and PID control based on Back-Propagation Neural Network are adopted. Numerical simulations and ground experimental results are presented with comparison for an autonomous proximity maneuver and docking of the chaser simulator to the nonfloating target, which valid the efficiency of the sliding mode control and the test bed capabilities.
介绍了一种新型在轨服务系统实验室试验台,实现了追星航天器与质量相近的目标航天器的自主进近与对接仿真。测试平台系统由一个追逐器和一个目标航天器模拟器组成,通过一个大理石平台上的空气垫漂浮。通过卡尔曼滤波,利用单相机视觉传感器和IMU进行联合测量,获得了跟踪飞行器的相对导航。六个冷气开关推进器和一个飞轮用于追逐模拟器的平移和旋转。考虑到模型的不确定性,采用了滑模控制和基于反向传播神经网络的PID控制两种非线性控制算法。仿真结果与地面实验结果进行了比较,验证了滑模控制的有效性和试验台的性能。
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引用次数: 0
The algorithm of high precision attitude determination with low precision sensors based on data fusion 基于数据融合的低精度传感器高精度姿态确定算法
Lu Cao, Tao Sheng, Xiaoqian Chen
The technology of high precision attitude determination with low precision sensors based on data fusion is the objective requirement of modern small satellite. This paper presents a new attitude determination algorithm termed Pre-process EKF(PP-EKF) based on preprocess of sensor data. It can enhance the overall modeling accuracy by using the quadratic penalty function to correct the kinematics model error and angular velocity error in real-time. The measurement model of EKF is linearized by introducing q method the solution error of which is also corrected to futher improve the accuracy of the measurement model and make better use of measurement data from low precision sensors, so as to ultimately obtain good attitude determinination results. At last, the simulation results demonstrate the high reliability and advantages of the proposed algorithm.
基于数据融合的低精度传感器高精度定姿技术是现代小卫星发展的客观要求。提出了一种基于传感器数据预处理的姿态确定算法,称为预处理EKF(Pre-process EKF)。利用二次罚函数实时修正运动学模型误差和角速度误差,提高整体建模精度。引入q方法对EKF测量模型进行线性化处理,并对q方法的求解误差进行校正,进一步提高测量模型的精度,更好地利用低精度传感器的测量数据,最终获得较好的姿态确定结果。最后,仿真结果验证了该算法的高可靠性和优越性。
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引用次数: 2
Designing a fuzzy expert system to predict the concrete mix design 设计一个模糊专家系统来预测混凝土配合比设计
M. Neshat, Ali Adeli
The aim of this study is to design a Fuzzy Expert System to determine the concrete mix design. In the civil engineering, the determination of concrete mix design is so difficult and usually results in imprecision. Fuzzy logic is a way to represent a sort of uncertainty which is understandable for human. So, we can use the fuzzy logic to easily determine the concrete mix designs in a descriptive form. The input fields of system are Slump, Maximum Size of Aggregate (Dmax), Concrete Compressive Strength (CCS) and Fineness Modulus (FM). The output fields are quantities of water, Cement, Fine Aggregate (F.A) and Course Aggregate (C.A). The experimental results show that the average error of predicted compressive strength for FIS is 6.43%, the minimum error of which is 4.73%.
本研究的目的是设计一个模糊专家系统来确定混凝土配合比设计。在土木工程中,混凝土配合比设计的确定是一个难点,往往导致不精确。模糊逻辑是人类可以理解的不确定性的一种表现方式。因此,我们可以利用模糊逻辑以描述性的形式方便地确定混凝土配合比设计。系统输入域为坍落度、最大骨料粒径(Dmax)、混凝土抗压强度(CCS)和细度模量(FM)。输出字段是水,水泥,细骨料(F.A)和粗骨料(C.A)的数量。实验结果表明,FIS抗压强度预测的平均误差为6.43%,最小误差为4.73%。
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引用次数: 17
An adaptable system for energy management in intelligent buildings 智能建筑能源管理的自适应系统
Blerim Qela, H. Mouftah
In this paper, an adaptable system model for energy management in intelligent buildings is investigated. The application of wireless sensor networks and adaptive learning techniques, in order to bring forward an “Adaptable Systemic Solution” is described. Furthermore, conceptual model and high level architecture of an adaptable system for energy management in “Intelligent Buildings” is proposed. The importance of an adaptable system encompassing few subsystems, sharing knowledge and data is described. The analytical model of a novel Adaptive Learning System capable to learn and adapt by exploiting a rules-based expert system and adaptive learning principles, is proposed and described. Its use for an enhanced version of a Programmable Communicating Thermostat is discussed.
本文研究了智能建筑能源管理的自适应系统模型。介绍了无线传感器网络和自适应学习技术的应用,提出了一种“自适应系统解决方案”。在此基础上,提出了智能建筑能源管理自适应系统的概念模型和高层体系结构。描述了包含少量子系统、共享知识和数据的适应性系统的重要性。利用基于规则的专家系统和自适应学习原理,提出并描述了一种具有学习和适应能力的新型自适应学习系统的分析模型。讨论了其用于可编程通信恒温器的增强版本。
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引用次数: 7
期刊
2011 IEEE International Conference on Computational Intelligence for Measurement Systems and Applications (CIMSA) Proceedings
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