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

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Reduction of motion artifacts from pulse oximeter signals using tunable Q-factor wavelet transform technique 利用可调q因子小波变换技术减少脉搏血氧计信号中的运动伪影
M. R. Ram, K. Sivani, K. Reddy
Pulse Oximeter (PO) employed in critical care units is crucial equipment to measure the vital parameters like oxygen blood saturation levels and heart rate of the patient. Using PO device, required medical data is acquired using the photoplethysmographic (PPG) data utilizing PPG sensors attached on forehead/ to finger/at earlobe of the patient and then Ratio parameter (R) is computed pertaining to amplitudes of acquired red and IR PPG signals. Further, ‘R’ is used to estimate oxygen saturation levels with the help of calibration curve. Subject movements while recording the medical data may result in erroneous estimation of required estimation parameter and in turn may result in wrong diagnosis by the clinician. Reduction of Motion Artifacts (MA) component from raw PPG data recorded may guarantee error-free measurement of oxygen blood saturation level (SpO2). MA's can be removed from raw PPG signal (corrupted) using band pass filtering method, but the persisting in-band noise component cannot be removed. In this paper, authors propose a filtering method using tunable Q-factor wavelet transform (TQWT) to remove MA components. Advantage of TQWT sytems from the fact that, the realization of practical narrow band pass filter with a specific Q-factor value can be designed, which motivated the authors to use for this application. Experimental results have shown a good acceptance for the proposed method as the MA reduced PPG signals obtained are having efficient morphological features. SpO2 is estimated from MA reduced PPGs by utilizing the calibration curve. The superiority of proposed technique has been proved by comparing the experimental results with results obtained using basic least mean squares (LMS) method. Signal data can be acquired with different MA components (bending, horizontal and vertical movements of patient's finger) is considered for experiment analysis. Obtained SpO2 parameter calculations proved the efficacy of estimation technique in measurement of reliable and accurate SpO2, helpful for medical diagnosis.
脉搏血氧仪(PO)是在重症监护病房测量患者血氧饱和度、心率等重要参数的重要设备。使用PO设备,利用附着在患者额头/手指/耳垂上的PPG传感器,使用光电体积脉搏图(PPG)数据获取所需的医疗数据,然后计算与获取的红色和红外PPG信号幅度相关的比率参数(R)。此外,“R”用于借助校准曲线估计氧饱和度水平。受试者在记录医疗数据时的运动可能导致对所需估计参数的错误估计,进而可能导致临床医生的错误诊断。从记录的原始PPG数据中减少运动伪影(MA)成分可以保证血氧饱和度(SpO2)的无误差测量。使用带通滤波方法可以从原始PPG信号(损坏)中去除MA,但无法去除持续存在的带内噪声成分。本文提出了一种利用可调q因子小波变换(TQWT)去除MA分量的滤波方法。TQWT系统的优势在于可以设计出具有特定q因子值的实用窄带通滤波器,这促使作者将其用于该应用。实验结果表明,该方法具有良好的可接受性,得到的MA约简PPG信号具有有效的形态学特征。利用校准曲线从MA还原PPGs中估计SpO2。将实验结果与基本最小均二乘法(LMS)的结果进行了比较,证明了该方法的优越性。考虑不同MA分量(患者手指的弯曲、水平和垂直运动)可获取信号数据进行实验分析。得到的SpO2参数计算结果证明了估计技术测量SpO2可靠、准确的有效性,有助于医学诊断。
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引用次数: 4
Speky: A diffraction based application specific instrumentation (ASIN) counterfeit medicine detection system Speky:一种基于衍射的专用仪器(ASIN)假药检测系统
A. Mishra, R. Janowski
Counterfeit medicine is a major problem in today's world. There are many existing methods which are effective in lab environment and mostly are too sophisticated to be used by untrained health workers in the field. We present an application specific instrumentation principle inspired system for fake medicine detection. This is based on a crude spectroscope and cloud based analytics tools. We call it Speky! We demonstrate the working of the system with a good success rate.
假药是当今世界的一个主要问题。现有的许多方法在实验室环境中是有效的,但大多过于复杂,无法由未经培训的卫生工作者在现场使用。提出了一种基于仪器原理的假药检测系统。这是基于粗糙的分光镜和基于云的分析工具。我们叫它斯派克!我们演示了该系统的工作,成功率很高。
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引用次数: 2
Non-intrusive technique for pathological voice classification using jitter and shimmer 基于抖动和闪烁的非侵入性病理语音分类技术
N. Sripriya, S. Poornima, R. Shivaranjani, P. Thangaraju
Speech signal contains two characteristics, system and source. When there is disturbance in vocal cord function, there is notable change in source characteristic. Despite the technological advances in the medical field, the voice pathologists use endoscopic methods to view the vocal cord flap movements for patients with infections and disturbances in vocal cords which are painful. This work is an alternative for classifying pathological voice from normal voice by evaluating the jitter and shimmer variations in the speech signal of an affected person. When there is any distortion in voice, it is reflected in the source characteristics. Pitch being the fundamental source characteristic, analyzing pitch helps us classify pathological voice from normal voice. Jitter and shimmer are derived characteristics of pitch. The glottal closure instants are better representatives of source compared to pitch. In this work, we have explored using the glottal closure instants to calculate the jitter, shimmer and other speech parameters instead of the pitch period. Analyzing these jitter and shimmer parameters for various pathological voices and normal voices help us to classify them. Experiments were carried out using a database containing normal and pathological voices. An accuracy of 85% was achieved for normal-pathological voice classification.
语音信号包含系统和源两个特征。当声带功能受到干扰时,声源特征发生显著变化。尽管医学领域的技术进步,但声音病理学家使用内窥镜方法来观察声带感染和声带紊乱患者的声带皮瓣运动,这是痛苦的。这项工作是通过评估受影响的人的语音信号中的抖动和闪烁变化来对病理语音和正常语音进行分类的一种替代方法。当声音有失真时,就会反映在音源的特性上。音高是音源的基本特征,分析音高有助于我们区分病理声音和正常声音。抖动和闪烁是基音的派生特性。与音高相比,声门关闭的瞬间更能代表音源。在这项工作中,我们探索了使用声门关闭瞬间来计算抖动,闪烁和其他语音参数,而不是音高周期。分析各种病理性声音和正常声音的抖动和闪烁参数有助于我们对它们进行分类。实验使用包含正常和病理声音的数据库进行。正常-病理语音分类准确率达到85%。
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引用次数: 7
Use of honeypots for mitigating DoS attacks targeted on IoT networks 使用蜜罐来减轻针对物联网网络的DoS攻击
M. Anirudh, Arul Thileeban, Daniel Jeswin Nallathambi
Every day, a new technology comes up and the primary reason why it fails to attract many people in this era is the concern of privacy and security. Each day, along with the new technology comes a load of vulnerabilities waiting to be exploited. IoT (Internet of Things) is the latest trend and like all technology, it is open for exploitation. The most common attack which is used to bring down a whole network, without even finding a loophole in the security — DoS can be used to pull down any IoT network as well. In this paper, we propose a honeypot model for mitigating DoS attacks launched on IoT devices. Honeypots are commonly used in online servers as a decoy to the main server so that the attack is mitigated to the decoy instead of the main server. Here a similar methodology is used to avoid the whole IoT system from being shut down due to a DoS attack.
每天都有一项新技术出现,在这个时代,它不能吸引很多人的主要原因是对隐私和安全的担忧。每天,伴随着新技术而来的是大量等待被利用的漏洞。物联网(IoT)是最新的趋势,像所有技术一样,它是开放的。最常见的攻击是用来摧毁整个网络,甚至没有发现安全漏洞——DoS也可以用来摧毁任何物联网网络。在本文中,我们提出了一个蜜罐模型来减轻对物联网设备发起的DoS攻击。蜜罐通常用于在线服务器,作为对主服务器的诱饵,以便将攻击减轻到诱饵而不是主服务器。这里使用类似的方法来避免整个物联网系统因DoS攻击而关闭。
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引用次数: 83
Performance analysis of pentagon shaped microstrip patch antenna 五边形微带贴片天线的性能分析
L. Chandiea, K. Anusudha
The trend in today's wireless application is to design antennas that are compact, robust and ease to integrate with RF circuit components. Microstrip patch antenna is one such type that satisfies the above requirement. But the two main factors of an antenna namely the gain and the bandwidth are low for patch antennas. Usually the gain range of patch antenna is 1–2dB. The most straightforward way of increasing these factors involves the use of low dielectric substrate with increased thickness, but this inevitably leads to surface wave generation. As a result, sensible substrate thickness has to be employed. This paper presents pentagon shape patch antenna with probe feed for three different dimensions. The analysis is done using Ansoft HFSS software version 15.0. The performance parameters such as bandwidth, gain and return loss of the proposed antennas are compared.
当今无线应用的趋势是设计紧凑,坚固且易于与射频电路组件集成的天线。微带贴片天线就是满足上述要求的一种。但是天线的增益和带宽这两个主要因素对于贴片天线来说是低的。通常贴片天线的增益范围为1 ~ 2db。增加这些因素的最直接的方法涉及使用低介电基片与增加厚度,但这不可避免地导致表面波的产生。因此,必须采用合理的基材厚度。提出了一种五边形贴片天线,具有三种不同尺寸的探针馈源。采用Ansoft HFSS 15.0版软件进行分析。比较了所提天线的带宽、增益和回波损耗等性能参数。
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引用次数: 4
Substrate integrated waveguide tapered slot antenna for 57–64 GHz band applications 用于57-64 GHz频段应用的衬底集成波导锥形槽天线
M. N. Kumar, T. Shanmuganantham
Substrate integrated waveguide is good candidate for implementing for millimeter wave applications. In this paper, we represented substrate integrated waveguide tapered slot antenna for 57–64 GHz frequency range, which is developed by using Rogers RT/Duriod 5880 with dielectric constant of 2.2 and 0.381mm substrate height. The simulation results shows that reflection coefficient, VSWR, Gain, Radiation efficiency, total efficiency, surface current and obtained 3.08GHz impedance bandwidth with respect to −10 dB reference line and also preserves 44% bandwidth over entire band. Electromagnetic tool Computer simulation technology studio suite software was used for simulation.
衬底集成波导是实现毫米波应用的理想选择。本文采用介电常数为2.2、衬底高度为0.381mm的Rogers RT/ period 5880,设计了57 ~ 64 GHz频率范围的衬底集成波导锥形缝隙天线。仿真结果表明,相对于−10 dB基准线,反射系数、驻波比、增益、辐射效率、总效率、表面电流得到了3.08GHz的阻抗带宽,并且在整个频带上保持了44%的带宽。电磁工具采用计算机仿真技术studio套件软件进行仿真。
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引用次数: 3
期刊
2017 International Conference on Computer, Communication and Signal Processing (ICCCSP)
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