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2017 International Conference on Computer, Communication and Signal Processing (ICCCSP)最新文献

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Detection of sleep apnea from multiparameter monitor signals using empirical mode decomposition 利用经验模态分解从多参数监测信号中检测睡眠呼吸暂停
K. V. Madhav, E. Krishna, K. Reddy
For diagnosing obstructive sleep apnea (OSA), polysomnography (PSG) is used. Use of PSG is gold standard for detection of sleep apnea. This research is basically aimed at detection of sleep apnea from more commonly available physiological signals such as electrocardiogram (ECG) and photoplethysmographic (PPG) signals in any simple bedside multiparameter monitors. Respiratory activity extracted from ECG and PPG signals is used for the detection of apnea episodes. This process is useful in situations when recording of PSG is not possible or as a preliminary screening test of possible OSA in patients. In the present work ECG-derived respiration (EDR) and PPG derived respiration (PDR) signals, obtained using empirical mode decomposition (EMD) method, and are used to detect OSA episodes. Signals from MIMIC database were used for experimentation. The test results have revealed that the proposed method has efficiently extracted respiratory information from ECG and PPG signals for detection of obstructive sleep apnea syndrome (OSAS). The similarity parameters computed in both time and frequency domains have confirmed the same. High sensitivity and positive predictivity levels have revealed high degree of correctness.
用于诊断阻塞性睡眠呼吸暂停(OSA),使用多导睡眠图(PSG)。使用PSG是检测睡眠呼吸暂停的金标准。本研究的主要目的是检测睡眠呼吸暂停从更常见的生理信号,如心电图(ECG)和光电容积脉搏图(PPG)信号在任何简单的床边多参数监测器。从ECG和PPG信号中提取的呼吸活动用于检测呼吸暂停发作。这个过程在不能记录PSG的情况下或作为可能的OSA患者的初步筛选试验是有用的。在本研究中,使用经验模式分解(EMD)方法获得的ecg衍生呼吸(EDR)和PPG衍生呼吸(PDR)信号用于检测OSA发作。使用MIMIC数据库中的信号进行实验。实验结果表明,该方法能够有效地从ECG和PPG信号中提取呼吸信息,用于阻塞性睡眠呼吸暂停综合征(OSAS)的检测。在时域和频域计算的相似度参数证实了这一点。高灵敏度和积极的预测水平表明了高度的正确性。
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引用次数: 5
Investigation of variable discretization resolution for CD-EKFs in space object tracking 空间目标跟踪中cd - ekf变离散化分辨率研究
Ashiv Dhondea, A. Mishra, M. Inggs
Space object (satellite or space debris) tracking has been identified as a key component of Space Situational Awareness. Space object tracking is a continuous-discrete filtering problem. Conventional extended Kahnan filter (EKF) and un-scented Kalman filter (UKF) methods are formulated for discrete-discrete filtering problems. New versions of the EKF have been engineered recently for continuous-discrete filtering problems. We first discuss the dynamic and observation model of the space object tracking problem on which we later on test 5 filters in the CD-EKF framework. Our results show that for the space object tracking problem with radar, solutions which discretize the Langevin equation give results comparable to Moment-Matching based EKFs at very high discretization resolutions.
空间物体(卫星或空间碎片)跟踪已被确定为空间态势感知的关键组成部分。空间目标跟踪是一个连续离散滤波问题。针对离散-离散滤波问题,提出了传统的扩展卡南滤波(EKF)和无气味卡尔曼滤波(UKF)方法。新版本的EKF最近被设计用于连续离散滤波问题。我们首先讨论了空间目标跟踪问题的动态模型和观测模型,然后在CD-EKF框架中测试了5个滤波器。我们的研究结果表明,对于雷达空间目标跟踪问题,在非常高的离散化分辨率下,离散朗格万方程的解可以得到与基于矩匹配的ekf相当的结果。
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引用次数: 1
Attendance monitoring system using facial recognition with audio output and gender classification 考勤监控系统采用带有音频输出和性别分类的面部识别
S. Poornima, N. Sripriya, B. Vijayalakshmi, P. Vishnupriya
Maintaining and taking log of attendance in a class is not much effective through manual process. Since bunking the classes or giving proxies for the absentees become fun and fantasy among the current generation students. Manual entering of attendance in logbooks becomes a difficult task and it can be easily manipulated. Therefore, this paper aims in presenting an automated attendance System — AUDACE. This system automatically detects the student in the class room and marks the attendance by recognizing their face. This system is developed by capturing real time human faces in the class. The detected faces are matched against the reference faces in the dataset and marked the attendance for the attendees. Finally the absentee lists are said aloud through voice conversion system for confirmation. Secondly, the system is trained to classify the gender of the students present in the class.
通过手工流程来维护和记录班级出勤记录的效果并不好。因为在这一代学生中,旷课或代课成为一种乐趣和幻想。在考勤日志中手工录入考勤成为一项困难的任务,但它可以很容易地进行操作。因此,本文旨在介绍一个自动考勤系统——AUDACE。该系统自动检测教室里的学生,并通过识别他们的脸来标记出勤。这个系统是通过在课堂上实时捕捉人脸来开发的。检测到的人脸与数据集中的参考人脸进行匹配,并标记出席者的出席率。最后通过语音转换系统大声读出缺席名单进行确认。其次,对系统进行训练,对课堂上学生的性别进行分类。
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引用次数: 15
A performance comparison of document oriented NoSQL databases 面向文档的NoSQL数据库性能比较
K. Kumar, Srividya, S. Mohanavalli
Due to exponential growth of data over the years, there are lot of formats in which the data is available. Many schema-less databases are identified as the data these days do not pertain itself to a particular scheme. So, the effective storage and processing of such data were not possible with the existing RDBMS. The looming of NoSQL databases proved to be one of the best solutions for handling these kind of schema-less data. This work comprises about the various characteristics of NOSQL databases. The performance comparison of two widely used Document-oriented NOSQL databases viz MongoDB and CouchDB are analysed in this work. Both qualitative as well as quantitative features are taken and a comparison for streaming applications among those features are provided using the two databases under study.
由于多年来数据呈指数级增长,有许多格式的数据可用。目前,许多无模式数据库被认为是数据不属于特定的模式。因此,现有的RDBMS不可能有效地存储和处理这些数据。NoSQL数据库的出现被证明是处理这类无模式数据的最佳解决方案之一。这项工作包括NOSQL数据库的各种特性。本文对两种广泛使用的面向文档的NOSQL数据库MongoDB和CouchDB的性能进行了比较分析。采用了定性和定量的特征,并使用所研究的两个数据库对流应用程序的这些特征进行了比较。
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引用次数: 27
Denoising of fingerprint images by exploring external and internal correlations 通过探索外部和内部的相关性去噪指纹图像
K S Krishnapriya
Fingerprint is an important measure used to detect an unknown victim, suspect or witness. It has a major role in verifying records to explore links and matches between a suspect and a crime. Fingerprints are also used for security reasons, such as an entrance control at important buildings. But the quality of fingerprint images can easily get degraded by skin dryness, wet, wound and other types of noises. Hence denoising of fingerprint images is a necessary step in systems for automatic fingerprint recognition. This paper suggests a 3-stage process for the removal of noise from fingerprint images, through exploring external correlations and internal correlations, with the help of a set of correlated images. Internal and external data cubes are built for each noisy patch by discovering identical patches from the corresponding noisy and internet based images. External denoising in the first stage is done by a graph based optimization method and internal denoising is done by means of a frequency truncation process. Internal denoising results and external denoising results are combined to obtain the preliminary denoising result. The second stage performs filtering of external and internal cubes and the fused result is in turn passed to the third stage. In the third stage, an image enhancement technique is carried out to obtain the final denoised result. This method is compared with the existing algorithms and the experimental results, in terms of its PSNR (Peak Signal to Noise Ratio) values and SSIM (Structural Similarity Measure) values proved that the method is efficient than all of them.
指纹是识别未知被害人、嫌疑人或证人的重要手段。它在核实记录以探索嫌疑人与犯罪之间的联系和匹配方面发挥着重要作用。指纹也用于安全方面,比如重要建筑的入口控制。但指纹图像的质量很容易因皮肤干燥、潮湿、伤口和其他类型的噪音而降低。因此,指纹图像去噪是指纹自动识别系统的必要步骤。本文提出了一种利用一组相关图像,通过探索指纹图像的外部相关性和内部相关性,分三步去除指纹图像噪声的方法。通过从相应的噪声和基于互联网的图像中发现相同的补丁,为每个噪声补丁构建内部和外部数据立方体。第一阶段的外部去噪采用基于图的优化方法,内部去噪采用频率截断处理。将内部去噪结果与外部去噪结果相结合,得到初步去噪结果。第二阶段执行外部和内部多维数据集的过滤,然后将融合的结果传递给第三阶段。第三阶段,对图像进行增强处理,得到最终去噪结果。将该方法与现有算法和实验结果进行比较,从其峰值信噪比(PSNR)值和结构相似度度量(SSIM)值两方面证明了该方法的有效性。
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引用次数: 3
An IoT based remote HRV monitoring system for hypertensive patients 基于物联网的高血压患者HRV远程监测系统
R. Kirtana, Y. V. Lokeswari
Heart Rate Variability (HRV) is a measure of variation in the time interval between consecutive heart beats. HRV analysis is highly sensitive for risks linked with Cardiovascular disease, Diabetic Mellitus, disease states associated with Autonomic Dysrhythmia such as Hypertension and a large array of chronic degenerative medical condition. Sensitivity of HRV towards various medical condition accounts for its increased usage by doctors as a diagnostic, prognostic tool and to evaluate the effectiveness of the treatment offered. Often borderline hypertensive patients with and without history of a cardiac event are subjected to stroke as well as cardiac mortality at high risk. Monitoring of HRV parameters for such cases of high risk will prove useful in providing adequate medical care at needed times. In this paper, the authors propose a low-cost and easy to use Remote HRV Monitoring System based on the Internet of Things (IoT) technology for borderline Hypertensive patients. In the proposed system, HRV parameters are derived using Wireless Zigbee based pulse sensor. Arduino transmits patient data to server using MQTT protocol. The application server collects HRV data and plots graphs. In case of an emergency situation, the care taker and doctor are intimated through Short Message Service (SMS) for providing adequate medical help. While there are currently no HRV analysis systems that alerts at times of high risk for hypertensive patients along with the aid of a remote doctor, the proposed system aims at achieving the same. The proposed system combines the dual benefits of Zigbee and WiFi technology. By doing so, it successfully fulfils all the ideal traits of a remote health monitoring system in terms of low-cost, long range, security, promptness and easy-to-use that serves in saving lives.
心率变异性(HRV)是连续心跳间隔时间变化的量度。HRV分析对与心血管疾病、糖尿病、与自主节律障碍(如高血压)相关的疾病状态和大量慢性退行性疾病相关的风险高度敏感。HRV对各种疾病的敏感性使得医生越来越多地使用它作为诊断、预后工具和评估所提供治疗的有效性。通常伴有或无心脏事件史的边缘性高血压患者易发生中风和心脏死亡。对这类高风险病例的心率变异参数进行监测将有助于在需要的时候提供充分的医疗护理。本文提出了一种基于物联网(IoT)技术的低成本、易用的边缘型高血压患者HRV远程监测系统。在该系统中,利用基于无线Zigbee的脉冲传感器推导出HRV参数。Arduino使用MQTT协议将患者数据传输到服务器。应用服务器收集HRV数据并绘制图形。在紧急情况下,通过短信服务通知照顾者和医生,以便提供适当的医疗帮助。虽然目前还没有HRV分析系统在远程医生的帮助下,在高血压患者的高风险时刻发出警报,但拟议的系统旨在实现这一目标。该系统结合了Zigbee和WiFi技术的双重优势。通过这样做,它成功地实现了远程健康监测系统在低成本、远程、安全、及时和易于使用方面的所有理想特征,为拯救生命服务。
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引用次数: 34
OFDM channel estimation using novel LMS adaptive algorithm 基于LMS自适应算法的OFDM信道估计
E. Krishna, K. Sivani, K. Reddy
Spectrally efficient orthogonal frequency division multiplexing (OFDM) offers an ideal solution to inter symbol interference (ISI), by maintaining the orthogonality among subcarriers. For a multi carrier (MC) communication system, the wireless channel impulse response (CIR) varies rapidly under severe channel fading conditions. Fixed step size (FSS) adaptive filtering (AF) provides a way out for channel estimation and equalization, in slow varying fading channels. In this work, an adaptive step size (ASS) least mean squares (LMS) AF is utilized for the purpose of OFDM channel equalization. The performance of the proposed ASS-LMS AF is compared with variable step size (VSS) LMS and normalized LMS (NLMS) algorithms. The superiority of the proposed ASS LMS algorithm is evaluated by the bit error rate (BER) and mean square error (MSE) parameters, which shows an improvement.
频谱效率高的正交频分复用(OFDM)通过保持子载波间的正交性,为消除码间干扰(ISI)提供了理想的解决方案。对于多载波通信系统,在严重信道衰落条件下,无线信道脉冲响应(CIR)变化迅速。固定步长(FSS)自适应滤波(AF)为缓慢变化衰落信道的信道估计和均衡提供了一条出路。在这项工作中,自适应步长(ASS)最小均方(LMS) AF用于OFDM信道均衡的目的。并与变步长LMS (VSS)和归一化LMS (NLMS)算法进行了性能比较。通过误码率(BER)和均方误差(MSE)参数对该算法的优越性进行了评价。
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引用次数: 8
Keynote speakers: Social interactions and system vulnerabilities 主讲人:社会交互和系统漏洞
Yong Meng Teo
Dr. TEO Yong Meng is an Associate Professor of Computer Science at the National University of Singapore (NUS) and an Affiliate Professor at the NUS Business Analytics Centre. At NUS, he is the technical leader for Systems Research and he leads the Computer Systems Research Group. He was a Visiting Professor at the Chinese Academy of Science in China from 2010–2014. He received his PhD and MSc in Computer Science from the University of Manchester. His research interests include parallel computing, systems modeling and simulation and performance analysis. His recent work focuses on modeling the performance of heterogeneous parallel systems and emergent properties in complex systems among others. He has over 150 journal and conference publications and a number of best paper awards including the Best Applied Paper Award at the annual Wintersim Conference in 2015 and the Best Paper Award at the 10th International Conference on Algorithms and Architectures for Parallel Processing in 2010. Another paper, co-authored with his PhD student won the ACM SIGSIM Best PhD Student Paper Award in 2009. He has received various research grants including European Commission, Fujitsu Computers (Singapore) Pte Ltd, Fujitsu Laboratories Ltd (Japan), Sun Microsystems/Oracle (USA), NVIDIA and PSA Corporation.
张永孟博士是新加坡国立大学(NUS)计算机科学副教授,也是新加坡国立大学商业分析中心的副教授。在新加坡国立大学,他是系统研究的技术领导者,并领导计算机系统研究小组。2010-2014年任中国科学院客座教授。他在曼彻斯特大学获得计算机科学博士和硕士学位。主要研究方向为并行计算、系统建模与仿真、性能分析。他最近的工作主要集中在异构并行系统的性能建模和复杂系统中的涌现特性等方面。他发表了150多篇期刊和会议论文,并获得了许多最佳论文奖,包括2015年Wintersim年度会议的最佳应用论文奖和2010年第10届并行处理算法和架构国际会议的最佳论文奖。另一篇与他的博士生合著的论文获得了2009年ACM SIGSIM最佳博士生论文奖。他曾获得多项研究资助,包括欧盟委员会、富士通计算机(新加坡)私人有限公司、富士通实验室有限公司(日本)、Sun微系统/Oracle(美国)、NVIDIA和PSA公司。
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引用次数: 0
Dynamic generation of transactional contracts for hierarchical workflows 为分层工作流动态生成事务契约
K. Rajaram, C. Babu, Arun Adiththan
Service orientation is gaining momentum in distributed software applications, mainly because it facilitates interoperability. Service composition has been acknowledged as a promising approach to meet the user demands, whenever a single service cannot fulfill the needs. It is essential to ensure the reliability of the composed service, as the component services are offered by multiple providers from different organizations. The behavioral or transactional properties of component services determine the reliability of the composite service. The guaranteed values on transactional properties of every service must be recorded in a contract as agreed by a consumer and a provider, in order to avoid unpredictable performance in service provisioning. The approach proposed in this paper enables generation of contracts at runtime along with transactional guarantees, based on the frequently changing business requirements of service consumers. The approach is experimented with a case study of Scan Report Generation in healthcare domain.
面向服务在分布式软件应用程序中越来越流行,主要是因为它促进了互操作性。当单个服务不能满足需求时,服务组合被认为是满足用户需求的一种很有前途的方法。确保组合服务的可靠性至关重要,因为组件服务是由来自不同组织的多个提供者提供的。组件服务的行为或事务属性决定了组合服务的可靠性。每个服务的事务属性的保证值必须按照使用者和提供者的约定记录在契约中,以避免服务供应中出现不可预测的性能。本文中提出的方法支持在运行时生成契约以及基于服务消费者频繁变化的业务需求的事务保证。以医疗保健领域的扫描报告生成为例,对该方法进行了实验研究。
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引用次数: 0
Design of multi utility multi band microstrip calculator shaped patch antenna using coaxial feed 多用途多波段同轴馈电微带计算器型贴片天线的设计
T. Shanmuganatham, Deepanshu Kaushal
This paper demonstrates the structure and the result characterization of a multi band microstrip patch antenna closely resembling Microsoft Calculator Accessory logo. This antenna is intended to be used for several applications. The substrate used is FR4 epoxy substrate with a relative permittivity of 4.4, dielectric loss tangent of 0.002 and a thickness of 1.6 mm. The design uses a probe feeding mechanism owing to numerous advantages offered by it. The simulation software used is HFSS (High Frequency Structure Simulator). The structure resonates at 6 different frequencies including 1.2 GHz offering a reflection coefficient of −24.9 dB and a bandwidth of 47 MHz for aeronautical radio navigation, 1.53 GHz with a reflection coefficient of −16.9 dB and a bandwidth of 74.2 MHz for satellite communication, 2.56 GHz with a reflection coefficient of −29.7 dB and bandwidth of 121.7 MHz for wireless communication, 1.962 dB at 3.27 GHz with a reflection coefficient of −12.3 dB and a bandwidth of 62.7 MHz for private land mobile devices, 3.89 GHz with a reflection coefficient of −13.4 dB and a bandwidth of 68.4 MHz for fixed microwave devices and 5.91 GHz with a reflection coefficient of −17.3 dB and a bandwidth of 340 MHz for ISM equipment, personal land mobile, personal radio and amateur radio.
本文介绍了一种多波段微带贴片天线的结构和结果表征。这种天线打算用于几种应用。所采用的衬底为FR4环氧基板,相对介电常数为4.4,介电损耗正切为0.002,厚度为1.6 mm。该设计采用探针送料机构,由于它提供了许多优点。仿真软件为HFSS (High Frequency Structure Simulator,高频结构模拟器)。该结构在6个不同的频率上谐振,其中1.2 GHz的反射系数为- 24.9 dB,用于航空无线电导航,1.53 GHz的反射系数为- 16.9 dB,用于卫星通信,带宽为74.2 MHz, 2.56 GHz的反射系数为- 29.7 dB,用于无线通信,带宽为121.7 MHz。3.89 GHz,反射系数为- 13.4 dB,带宽为68.4 MHz,用于固定微波设备;5.91 GHz,反射系数为- 17.3 dB,带宽为340 MHz,用于ISM设备、个人陆地移动设备、个人无线电和业余无线电。
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引用次数: 6
期刊
2017 International Conference on Computer, Communication and Signal Processing (ICCCSP)
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