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2014 11th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE)最新文献

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Mini airplane: Design, aerodynamic modeling and stability 迷你飞机:设计、气动建模和稳定性
F. Guerrero, V. Martinez, O. García, D. Martinez-Vazquez
This paper presents the development of a mini airplane UAV, focusing on the aerodynamic design, modeling and stability. Mathematical model of the vehicle is obtained using the Euler-Lagrange formulation and includes aerodynamic parameters of the design. For the stability, a classic control law is proposed taking in account the aerodynamic parameters and the sensors bandwidth implemented in the aircraft. Simulation results are shown for the closed-loop system of the vehicle. Finally, aerodynamic design and avionics are based on flying and handling qualities for having a mini airplane that performs a reliable and stable flight.
本文介绍了一种小型飞机无人机的研制,重点介绍了其气动设计、建模和稳定性。采用欧拉-拉格朗日公式建立了飞行器的数学模型,并包含了设计的气动参数。为了保证系统的稳定性,提出了一种考虑气动参数和传感器带宽的经典控制律。最后给出了整车闭环系统的仿真结果。最后,气动设计和航空电子设备是基于飞行和操纵质量,以使迷你飞机执行可靠和稳定的飞行。
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引用次数: 0
Structural and optical properties of molybdenum doped bismuth vanadate powders 掺钼钒酸铋粉体的结构和光学性能
V. Merupo, S. Velumani, A. Kassiba, M. A. García-Sánchez
Molybdenum doped BiVO4 powders were prepared by Sol-gel method. Monoclinic scheelite phase was confirmed from X-ray diffraction (XRD) patterns and micro-Raman vibrational bands. Substitution of molybdenum in crystal sites of BiVO4 was evidenced from XRD by higher angle 2θ shift of the characteristic peak (-121) and from Raman showing lower frequency shift of dominant peak from 831 to 822 cm-1 which corresponds to V-O symmetric stretching mode. The morphological properties were analyzed by FE-SEM which confirmed the formation of homogeneous spherical shaped particles with size around 200-300nm. Optical properties were analyzed by Diffuse Reflectance Spectra which show higher absorption in the range of 550-850nm. Optical band gap energies were calculated by using Kubelka-Munk formula, i.e, 2.46 eV for 2 wt% Mo-BiVO4 and 2.47eV for undoped BiVO4. This confirms that, Mo-BiVO4 particles have the same band gap but induce higher absorption in visible light region compared to BiVO4.
采用溶胶-凝胶法制备了钼掺杂BiVO4粉末。x射线衍射图和微拉曼振动谱证实了白钨矿的单斜晶相。钼在BiVO4晶体位置的取代在XRD上表现为特征峰(-121)有较大的2θ角位移,在Raman上表现为优势峰从831到822 cm-1的较低的频率位移,对应于V-O对称拉伸模式。通过FE-SEM对其形貌进行了分析,证实形成了粒径在200 ~ 300nm左右的均匀球形颗粒。漫反射光谱分析表明,在550 ~ 850nm范围内具有较高的吸收。利用Kubelka-Munk公式计算光学带隙能,即2 wt% Mo-BiVO4为2.46 eV,未掺杂BiVO4为2.47eV。这证实了Mo-BiVO4粒子具有相同的带隙,但在可见光区比BiVO4具有更高的吸收。
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引用次数: 7
Triangulation-based indoor robot localization using extended FIR/Kalman filtering 基于扩展FIR/卡尔曼滤波的室内机器人三角定位
Moises Granados-Cruz, Juan J. Pomarico-Franquiz, Y. Shmaliy, L. Morales-Mendoza
A combined extended finite impulse response (EFIR) and Kalman (EFIR/Kalman) algorithm is proposed for mobile robot localization via triangulation. A distinctive advantage of the EFIR algorithm is that it completely ignores the noise statistics which are typically not well known to the engineer. Instead, it requires an optimal averaging interval of Nopt points. To run this algorithm, several initial Kalman estimates are used for the roughly set noise covariances. We consider a mobile robot travelling on an indoor floorspace and localized via triangulation with three nodes in a view. We show that the EFIR/Kalman filter is more accurate than the extended Kalman filter under the uncertain noise statistics and initial state.
针对移动机器人三角定位问题,提出了一种扩展有限脉冲响应(EFIR)和卡尔曼(EFIR/Kalman)联合算法。EFIR算法的一个显著优点是它完全忽略了工程师通常不知道的噪声统计量。相反,它需要Nopt点的最优平均区间。为了运行该算法,对粗略设置的噪声协方差使用了几个初始卡尔曼估计。我们考虑一个移动机器人在室内地板空间上行走,并通过三角测量在视图中有三个节点进行定位。结果表明,在噪声统计量和初始状态不确定的情况下,EFIR/卡尔曼滤波比扩展卡尔曼滤波更精确。
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引用次数: 4
Rao-blackwellized particle filter for multiple object tracking in video analysis rao -blackwell化粒子滤波用于视频分析中的多目标跟踪
Sergio Gonzalez-Duarte, M. Murguia
Object tracking is one of the most important tasks in video analysis systems. Starting with a precise object tracker it is possible to perform video analysis tasks such as people counting, object classification or determine abnormal behaviors to name a few. This paper reports a Rao-Blackwellized Particle Filter model for multiple object tracking. The reported model shows good results handling with single, multiple and unknown number of targets. It was also tested considering various occlusion conditions, which are not frequently reported in literature. The model works on a binary image generated with a moving object segmentation algorithm, differentiating object and background classes. This characteristic provides the opportunity of integrating this particle filter model to other segmentation algorithms and moving object detectors in video sequences. The paper reports both qualitative results and quantitative metrics to show the performance of the systems under diverse conditions.
目标跟踪是视频分析系统中最重要的任务之一。从精确的目标跟踪器开始,可以执行视频分析任务,如人员计数,对象分类或确定异常行为等。本文报道了一种用于多目标跟踪的rao - blackwelzed粒子滤波模型。该模型在处理单目标、多目标和未知目标时均取得了较好的效果。它也被测试考虑各种闭塞条件,这在文献中不经常报道。该模型对运动目标分割算法生成的二值图像进行处理,区分目标类和背景类。这一特性为将该粒子滤波模型与视频序列中的其他分割算法和运动目标检测器相结合提供了机会。本文报告了定性结果和定量指标,以显示系统在不同条件下的性能。
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引用次数: 1
A foot temperature measuring system for diabetic patients 一种糖尿病患者足部温度测量系统
Fatima Lopez-Murillo, L. Leija, A. Vera
Diabetic foot ulcers (DFUs) are a major precursor to lower-limb amputations and a prominent cause of morbidity in patients with diabetes. There are several points on the foot susceptible to ulcers that are directly related to a temperature change. The aim of this study was to design and implement a foot temperature monitoring system. This system is capable of recording the temperature of four foot areas more susceptible to ulceration and then analyzed and processed the data collected. We tested our system over five diabetic and non-diabetic patients. The results indicate that there is a temperature difference between the right and the left foot on some of the diabetic patients.
糖尿病足溃疡(DFUs)是下肢截肢的主要前兆,也是糖尿病患者发病的主要原因。脚上有几个点易患溃疡,这与温度变化直接相关。本研究的目的是设计并实现一个足部温度监测系统。该系统能够记录四个易发生溃疡的足部区域的温度,然后对收集到的数据进行分析和处理。我们在5名糖尿病和非糖尿病患者身上测试了我们的系统。结果表明,部分糖尿病患者的左右足存在温度差异。
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引用次数: 3
Supporting face to face collaboration through dynamic arrays of mobile devices 通过移动设备的动态阵列支持面对面的协作
Marco Castro, S. Mendoza
Nowadays, it is difficult to find applications for mobile devices that allow co-located users to carry out transitions between individual and collaborative work modes. In fact, most of the single-user applications cannot be used to work with others, and vice-versa. The main contribution of this work is the design and implementation of a development support that allows programmers to extend their applications with functions to accomplish such work mode transitions, by relying on coupling and decoupling gestures on heterogeneous mobile devices to respectively do and undo irregular arrays of such devices. The proposed development support has been implemented for Android platforms following a P2P architecture.
如今,很难找到适合移动设备的应用程序,允许位于同一位置的用户在个人和协作工作模式之间进行转换。事实上,大多数单用户应用程序不能用于与其他应用程序协同工作,反之亦然。这项工作的主要贡献是设计和实现一个开发支持,允许程序员扩展他们的应用程序的功能来完成这种工作模式转换,通过依赖于异构移动设备上的耦合和解耦手势来分别执行和撤消这些设备的不规则数组。提议的开发支持已经在遵循P2P架构的Android平台上实现。
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引用次数: 0
Support for resource aggregation in collaborative P2P systems 支持协作式P2P系统中的资源聚合
Damian Arellanes, S. Mendoza, D. Decouchant
In the last years, usage alternatives of P2P systems have been proposed, in which nodes provide resources and use resources of others in a collaborative way, in order to accomplish high scale tasks. Such systems are called “Collaborative P2P Systems” and have an important role in resource aggregation: advertisement, discovery, selection, matching, and binding phases. However, any toolkit does not allow developers to incorporate resource aggregation support into such systems using a specific programming language. In addition, existent solutions do not achieve cohesion among the key phases of resource aggregation (selection, matching, and binding). The main contribution of this paper is the design and implementation of a novel support that provides cohesion among such key phases and allows developers to aggregate multi-attribute, single-attribute, dynamic, static, and heterogeneous resources into collaborative P2P systems. The proposed Java-based support follows an unstructured topology based on super-peers, which advertise, select, match, and bind resources on behalf of their peers, reducing the network traffic. To validate our proposal, we developed a collaborative P2P application that generates the Mandelbrot set by means of the collaboration of several heterogeneous resources.
在过去的几年中,人们提出了P2P系统的使用替代方案,其中节点以协作的方式提供资源并使用其他节点的资源,以完成大规模任务。这样的系统被称为“协作式P2P系统”,在资源聚合:广告、发现、选择、匹配和绑定阶段具有重要作用。然而,任何工具包都不允许开发人员使用特定的编程语言将资源聚合支持合并到这样的系统中。此外,现有的解决方案没有在资源聚合的关键阶段(选择、匹配和绑定)之间实现内聚。本文的主要贡献是设计和实现了一种新颖的支持,它提供了这些关键阶段之间的内聚性,并允许开发人员将多属性、单属性、动态、静态和异构资源聚合到协作的P2P系统中。建议的基于java的支持遵循基于超级对等体的非结构化拓扑,超级对等体代表它们的对等体发布、选择、匹配和绑定资源,从而减少了网络流量。为了验证我们的建议,我们开发了一个协作的P2P应用程序,该应用程序通过几个异构资源的协作来生成Mandelbrot集。
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引用次数: 0
An adaptive geometrically-complemented approach for ECG signal denoising 心电信号去噪的自适应几何互补方法
L. A. Gordillo, A. Medina-Santiago, José Ángel Zepeda-Hernández, H. H. Leon, M. Reyes-Barranca
This paper proposes a geometrical criterion for denoising a single-lead ECG signal. It was designed to ease the use of heuristic procedures for removing the most common types of noises from ANSI/AAMI-compliant ECG signals. However, in this paper, only the system-noise was considered to illustrate how this geometrical criterion is applied to the signal. The proposal here presented relies on a voltage-level slope detector that marks where the signal starts to increase, decrease or remain at the same level in order to perform an abstract segmentation of the ECG signal. The resulting segments are quantitatively classified as significant segments or noisy segments by analyzing their amplitude and time duration according to a previously defined threshold-level with the intention of helping the algorithm to decide its own operational parameters. The system-noise filter proposed here has five different operation modes. The main one is based on the arithmetic mean operation to smooth out short-term fluctuations; additionally, it is complemented with geometrical estimations for preserving the physiological characteristics of the ECG signal. The other operation modes are purely based on geometric estimations to calculate the filter output. The geometrical criterion described here differs from many other approaches presented until now owing to its low mathematical complexity and low computational consumption since all calculations can be performed with raw ADC readings and arithmetical operations, characteristics that make this filter easy to implement on embedded systems. This denoising approach was designed for online processing applications but it also works well with previously recorded signals.
提出了一种单导联心电信号去噪的几何准则。它旨在简化启发式程序的使用,以从符合ANSI/ aami的ECG信号中去除最常见的噪声类型。然而,在本文中,仅考虑系统噪声来说明如何将该几何准则应用于信号。这里提出的建议依赖于电压级斜率检测器,该检测器标记信号开始增加,减少或保持在同一水平,以便对心电信号进行抽象分割。根据预先定义的阈值水平,通过分析其振幅和持续时间,将得到的片段定量地划分为显著段或噪声段,以帮助算法确定自己的运行参数。本文提出的系统噪声滤波器有五种不同的工作模式。主要是基于算术平均运算来平滑短期波动;此外,它还补充了几何估计,以保持心电信号的生理特征。其他操作模式纯粹基于几何估计来计算滤波器输出。这里描述的几何准则不同于迄今为止提出的许多其他方法,因为它的数学复杂性低,计算消耗低,因为所有的计算都可以用原始ADC读数和算术运算来执行,这些特性使该滤波器易于在嵌入式系统上实现。这种去噪方法是为在线处理应用而设计的,但它也可以很好地处理先前记录的信号。
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引用次数: 1
Electrical characterization of textile electrodes for an ECG acquisition system 用于心电采集系统的纺织电极的电特性
R. Ambrosio-Lázaro, Cristina Guevara Neri, Carmen Silva, A. Heredia, M. Moreno
Electrocardiograph signals (ECG) are one of the most important parameters used for monitoring the human physiological state. Nowadays, the research works using fabric conductive textiles for ECG are focusing on reliable and wearable systems. However, a complete characterization of textile electrodes is required to integrate it in standard clothing. Therefore, this work is devoted to the electrical characterization of electrodes based on conductive textile for an ECG system that monitoring the different human positions and also a comparison using the traditional silver (Ag/AgCl) chloride electrodes is presented allowing to demonstrate that ECG measured signal with these devices is proper for applications in wearable health monitoring.
心电图信号是监测人体生理状态的重要参数之一。目前,将织物导电纺织品用于心电的研究工作主要集中在可靠的可穿戴系统上。然而,纺织品电极的完整特性需要将其集成到标准服装中。因此,这项工作致力于基于导电纺织品的ECG系统电极的电气特性,该系统可监测不同的人体位置,并与传统的银(Ag/AgCl)氯化物电极进行比较,以证明使用这些设备测量的ECG信号适用于可穿戴健康监测。
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引用次数: 3
Predictive control and truncated predictor: A comparative study on numerical benchmark problems 预测控制与截断预测器:数值基准问题的比较研究
Liliam Rodríguez-Guerrero, A. Ramírez, Carlos Cuvas
In this paper we revisit the procedures leading to a safe implementation of the well-known predictor-based feedback controller. Using a case study we reveal the limitations of such procedures and how the so-called truncated predictor feedback is able to avoid them. We also present a numerical comparison of the aforementioned controllers applied to a benchmark problem and provide a performance evaluation of both control schemes in terms of stability.
在本文中,我们回顾了导致众所周知的基于预测器的反馈控制器的安全实现的过程。通过一个案例研究,我们揭示了这种程序的局限性,以及所谓的截断预测器反馈如何能够避免它们。我们还对上述控制器应用于基准问题进行了数值比较,并从稳定性方面对两种控制方案进行了性能评估。
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引用次数: 2
期刊
2014 11th International Conference on Electrical Engineering, Computing Science and Automatic Control (CCE)
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