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2016 Second International Conference on Computational Intelligence & Communication Technology (CICT)最新文献

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Assessment of Fault Harmonics in Squirrel Cage Induction Motor 鼠笼式异步电动机故障谐波的评估
S. R. Kapoor, Parikshit Pareek, Nishant Khandelwal
Squirrel Cage Induction Motor (SCIM) is a perceptive device as its failure has devastating effect due to loss in performance and reliability of power system. This makes constant supervising of SCIM imperative. Harmonics are responsible for many nuisances. Yet, it is one of the eminent parameter of fault recognition in stator current of IM. When motor condition deviates from healthy one, the behaviour of these harmonics changes significantly. Substantial variation is attained in frequency bands about fundamental frequency by presence of extra signature in the signal. The trait of harmonics in a current signal is different for different load conditions for particular motor circumstances. In this paper, Fourier transform technique is used for spectral estimation. It provides the frequency-amplitude representation of the signal which enlightened about the magnitude of each frequency present in signal. The normalised graphical analysis shows that harmonics during the fault has substantial variation from healthy conditions. The work achieved the purpose of understanding and identifying irregularities in harmonics and the conclusion drawn from the test validates that the behaviour of odd harmonics is largely irregular for different load conditions. Also some important deductions by analysis are taken for further fault detection analogies.
鼠笼式感应电动机是一种感知装置,其故障将对电力系统的性能和可靠性造成破坏性影响。这使得对SCIM的持续监督势在必行。谐波是造成许多麻烦的原因。然而,定子电流是IM故障识别的重要参数之一。当运动状态偏离健康状态时,这些谐波的行为发生显著变化。由于信号中存在额外的特征,在基频附近的频带中可以获得实质性的变化。对于特定的电机环境,不同的负载条件下,电流信号中的谐波特征是不同的。本文采用傅里叶变换技术进行频谱估计。它提供了信号的频率-幅度表示,从而揭示了信号中存在的每个频率的幅度。归一化图形分析表明,故障期间的谐波与健康状态有很大的差异。工作达到了理解和识别谐波的不规则性的目的,从试验中得出的结论验证了奇次谐波在不同负载条件下的行为在很大程度上是不规则的。此外,通过分析得出了一些重要的推论,可用于进一步的故障检测类比。
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引用次数: 1
Cooperative Spectrum Sensing for Cognitive Radio Based on Adaptive Threshold 基于自适应阈值的认知无线电协同频谱感知
Manisha Gupta, G. Verma, R. Dubey
Cognitive radio (CR) has emerged as a promising solution to the spectrum scarcity problem, faced by all existing as well as newly proposed wireless services. In cognitive radio network (CRN) spectrum sensing plays the most important role and is considered as an integral part of CR. Among all the spectrum sensing schemes proposed in literature energy detection (ED) is commonly adopted due to its low complexity. But for low signal to noise ratio (SNR) region the performance of ED scheme deteriorates. To enhance the sensing performance of ED scheme for low SNR region, an adaptive threshold is considered in this paper. This adaptive threshold is a function of fixed (conventional) threshold and SNR of primary user (PU) signal received at CR. However the individual CR node may not give valid sensing results due to shadowing, multipath fading and hidden terminal problems of wireless communication channel. Therefore to deal with these problems we further implement the proposed approach under cooperation. In cooperative spectrum sensing (CSS) scheme, each CR will individually sense the spectrum using adaptive threshold and then transfer its decision to a central node also known as fusion center (FC). All the binary decisions received at FC are fused together and then final decision about the availability of spectrum is taken by FC. The simulation results show the better performance of adaptive threshold under cooperation than non-cooperation.
认知无线电(CR)已成为解决频谱短缺问题的一种有希望的解决方案,所有现有的和新提出的无线业务都面临着频谱短缺问题。在认知无线电网络(CRN)中,频谱感知扮演着最重要的角色,被认为是认知无线电网络(CRN)的重要组成部分,在文献中提出的频谱感知方案中,能量检测(ED)因其复杂度低而被普遍采用。但在信噪比较低的区域,ED方案的性能会下降。为了提高ED方案在低信噪比区域的感知性能,本文考虑了自适应阈值。该自适应阈值是固定(常规)阈值和接收到CR的主用户(PU)信号信噪比的函数,但由于无线通信信道的阴影、多径衰落和隐藏终端问题,单个CR节点可能无法给出有效的感知结果。因此,为了解决这些问题,我们进一步落实合作中提出的办法。在协同频谱感知(CSS)方案中,每个CR将使用自适应阈值单独感知频谱,然后将其决策传递给中心节点,也称为融合中心(FC)。将FC接收到的所有二进制决策融合在一起,然后由FC对频谱的可用性做出最终决策。仿真结果表明,合作条件下的自适应阈值优于非合作条件下的自适应阈值。
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引用次数: 26
Life Detection System during Natural Calamity 自然灾害中的生命探测系统
Pooja Garg, S. Srivastava
In this research we try to identify the human life inside debris in case of natural calamity. Here we are using acoustic sensors as an input and the reflected waves identify life of human being. The sensor is based on the concept of transmitting ultrasonic waves and analyzing the reflected waves to detect the motion of human body parts like lungs. It follows an incremental procedure as the transmitted frequency is incremented with each consecutive meter which is scanned for detecting human life. The depth of the buried individual is estimated on the basis of frequency emitted at that time stamp. The location coordinates are also achieved by using GPS device with the instrument. The gathered data is plotted live over the map by using softwares like Google Earth which provides it globally to fetch more help for victims. Advantages of acoustic sensors over sensors based on microwave radar technology are: sound can penetrates metal walls, and acoustic sensors are sensitive to slow motions, and so can detect stationary persons by breathing motion alone. The other advantage includes low cost and portability.
在这项研究中,我们试图在自然灾害的情况下识别碎片中的人类生命。在这里,我们使用声学传感器作为输入,反射波识别人类的生活。该传感器是基于发射超声波并分析反射波的概念,以检测人体部位(如肺部)的运动。它遵循一个递增的程序,因为传输频率随着每一个连续扫描的仪表而增加,以检测人类的生命。被埋的人的深度是根据在那个时间戳发射的频率来估计的。通过与仪器配合使用GPS装置,还可以实现定位坐标。收集到的数据通过谷歌Earth等软件在地图上实时绘制,这些软件可以在全球范围内为受害者提供更多帮助。与基于微波雷达技术的传感器相比,声学传感器的优点是:声音可以穿透金属墙,并且声学传感器对缓慢运动很敏感,因此可以仅通过呼吸运动来检测静止的人。另一个优点是低成本和便携性。
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引用次数: 6
A Review on Automated Detection of Non-convulsive Seizures Using EEG 脑电图自动检测非惊厥发作的研究进展
A. Q. Ansari, Priyanka Sharma
Seizures are mainly categorized as convulsive seizures and non-convulsive seizures. Diagnosis of convulsive seizures is easy due to its evident clinical manifestations. While these seizures can be the basis of neuronal damage, treatment is provided at the early stage due to its easy clinical diagnosis. On the other hand non-convulsive seizures lack convulsions. However, it too can cause neuronal damage. It can have fluctuating symptoms coupled with the mental state variation which makes the clinical diagnosis of it very difficult. Thus, it is frequently missed in patients of changed mental state. To confirm the diagnosis EEG is needed. This study gives an overview on the detection methods of non-convulsive seizures.
癫痫发作主要分为惊厥性发作和非惊厥性发作。惊厥发作的临床表现明显,容易诊断。虽然这些癫痫发作可能是神经元损伤的基础,但由于其易于临床诊断,因此可以在早期阶段提供治疗。另一方面,非惊厥性发作没有惊厥。然而,它也会导致神经元损伤。它可以有波动的症状加上精神状态的变化,这使得它的临床诊断非常困难。因此,在精神状态改变的患者中,它经常被遗漏。要确诊需要脑电图。本研究概述了非惊厥性癫痫发作的检测方法。
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引用次数: 5
A Critical Review of Substrate Integrated Waveguide for Microwave Applications 微波应用基板集成波导综述
A. Dahiya, A. Sengar, Dhirendra Kumar Dwivedi, Arun Kumar
This paper shows critical review of substrate Integrated waveguide (SIW) technology. Dielectric filled waveguide is converted into SIW with periodic arrangement of metallized holes on both sides of the it. SIW exhibit high pass response of conventional waveguide and band stop characteristics of periodic design. So filters designed using SIW exhibit less loss, less cost, less weight, high quality factor and high power handling capability. Various SIW passive and active circuits has been studied. Numerical method for modeling and design of SIW components is shown. A SIW has been designed showing insertion loss less than 0.1 dB. Design solutions for loss reduction are also discussed. Future design scope mainly aiming at Systems-on-Substrate integration of SIW components at higher frequencies including Ultra Wide Band range are also discussed.
本文对衬底集成波导(SIW)技术进行了综述。通过在介质填充波导两侧周期性地布置金属化孔,将介质填充波导转换为SIW。SIW具有传统波导的高通响应和周期性设计的带阻特性。因此,采用SIW设计的滤波器具有损耗小、成本低、重量轻、品质因数高、功率处理能力强等特点。对各种SIW无源和有源电路进行了研究。给出了SIW构件建模和设计的数值方法。设计了插入损耗小于0.1 dB的SIW。还讨论了降低损耗的设计方案。讨论了未来的设计范围,主要针对SIW元件在更高频率(包括超宽带范围)下的系统基板集成。
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引用次数: 9
Survey on Recent DDoS Mitigation Techniques and Comparative Analysis 最近DDoS缓解技术的调查和比较分析
Ankur Rai, R. Challa
Customers trust is the most important factor for an organization success. This trust only builds if customers receive unhindered services from their vendors. A major threat in successfully building a customer-vendor trust relationship exists in the form of Distributed Denial of Service attacks. These attacks have become more evasive and complex with time such that existing security mechanisms are not sufficient to counter them. A lot of techniques are already proposed by various researchers to counter these attacks which have their own application domain, advantages and disadvantages. In this paper we present an extensive survey of recent DDoS mitigation techniques along with their comparative analysis.
顾客信任是一个组织成功的最重要因素。只有当客户从他们的供应商那里得到畅通无阻的服务时,这种信任才会建立起来。成功建立客户-供应商信任关系的主要威胁是以分布式拒绝服务攻击的形式存在的。随着时间的推移,这些攻击变得更加难以捉摸和复杂,以至于现有的安全机制不足以应对它们。各种研究人员已经提出了许多技术来对抗这些攻击,这些技术都有自己的应用领域和优缺点。在本文中,我们提出了最近的DDoS缓解技术的广泛调查以及他们的比较分析。
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引用次数: 12
Effect of OFDM in Cognitive Radio: Advantages & Issues OFDM在认知无线电中的作用:优势与问题
Jagsir Singh, R. Garg, I. K. Aulakh
Cognitive Radio technology allows the unlicensed users to access the free licensed frequency band opportunistically to address the problem of the scarcity of unlicensed radio spectrum and for better utilization of the licensed radio spectrum. There was some problem in the cognitive radio systems such as Inter Symbol Interference and low data rate. To achieve the higher data rate and reduce the problem of Inter Symbol Interference, the Orthogonal Frequency Division Multiplexing modulation scheme has been used in cognitive radio systems. Basically OFDM modulation scheme transfers the data over multiple low rate subcarriers which are orthogonal to each other rather than single high rate carrier in conventional cognitive radio networks. It proves advantageous as it reduces the Inter-Symbol Interference, helps in spectrum sensing and also provides the interoperability. However it causes Peak-to-Average Power Ratio and reduces the spectral efficiency of OFDM based CR systems. In this technical paper various advantage of OFDM based cognitive radio and two major issues are also discussed along with various techniques to handle the PAPR problem.
认知无线电技术允许未持牌用户偶然地使用免费持牌频带,以解决未持牌无线电频谱稀缺的问题,并更好地利用持牌无线电频谱。认知无线电系统存在符号间干扰和数据传输速率低等问题。为了实现更高的数据传输速率和减少码间干扰,在认知无线电系统中采用正交频分复用调制方案。在传统的认知无线网络中,OFDM调制方案基本上是在多个相互正交的低速率子载波上传输数据,而不是在单个高速率载波上传输数据。它减少了码间干扰,有助于频谱感知,并提供了互操作性。然而,它导致了峰值平均功率比,降低了基于OFDM的CR系统的频谱效率。本文讨论了基于OFDM的认知无线电的各种优势,以及处理PAPR问题的各种技术所涉及的两个主要问题。
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引用次数: 8
Modified Positive Feedback Adiabatic Logic for Ultra Low Power Adder 超低功耗加法器的改进正反馈绝热逻辑
Shiv Pratap Singh Kushawaha, T. Sasamal
This paper proposes a modified positive feedback adiabatic logic (MPFAL) for ultra-low power circuits. MPFAL is based on positive DC voltage range 0.1 to 0.3 V. Half-adder and 1-bit full-adder incorporating this technique also been considered in this work. Comparison shows that average power is reduced in case of modified technique compared to positive feedback adiabatic logic (PFAL) for frequency range 10 MHz to 300 MHz and simulations are carried out by considering load capacitance from 30fF to 110fF. All the simulations have been done in Cadence Virtuoso Tool using UMC 180 nm CMOS technology. This technique can be used in ultra-low power digital circuits operated at higher frequencies.
提出了一种用于超低功耗电路的改进的正反馈绝热逻辑(MPFAL)。MPFAL是基于正直流电压范围0.1至0.3 V。本文还考虑了采用该技术的半加法器和1位全加法器。对比表明,在10 ~ 300 MHz频率范围内,与正反馈绝热逻辑(PFAL)相比,改进后的技术降低了平均功率,并考虑负载电容在30fF ~ 110fF范围内进行了仿真。所有的模拟都是在Cadence Virtuoso工具中使用UMC 180纳米CMOS技术完成的。该技术可用于在更高频率下工作的超低功耗数字电路。
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引用次数: 3
Congenital Heart Septum Defect Diagnosis on Chest X-Ray Features Using Neural Networks 应用神经网络诊断先天性心隔缺损的胸部x线特征
S. Jyothi, K. Vanisree
Artificial Neural Network is an information processing paradigm that is inspired by the biological nervous system. Decision Support System (DSS) has been identified as one of the important solution providers in the emerging field of Artificial Neural Networks. Medical Decision Support System (MDSS) is an interactive Decision Support System software, which is designed to assist physicians and other health professionals in decision making tasks and to diagnose the patient disease. The Medical Decision Support System reduces the diagnosis time and improves the accuracy of the diagnosis. One of the clinical tests performed to diagnose Congenital Heart Septum Defect is the Chest Radiography (X-Ray) through the contour of size, position and shape of the heart. In order to diagnose Congenital Heart Septum Defect, a physician analyzes the chest X-ray and extracts the features like heart size measurements. But manual extraction of features and diagnosis is a difficult task for a physician. Therefore, in the present study, an algorithm is developed to automatically analyze and to extract the features from Chest X-ray using Image Processing Techniques. Also, a Decision Support System is developed to Diagnose the Congenital Heart Septum Defect based on chest X-ray features using Backpropagation Neural Network model. The Network is trained by using a Delta Learning Rule. The proposed feature extraction algorithm and Decision Support System are implemented in MATLAB with GUI features.
人工神经网络是一种受生物神经系统启发的信息处理范式。决策支持系统(DSS)已被确定为人工神经网络新兴领域中重要的解决方案提供者之一。医疗决策支持系统(MDSS)是一个交互式决策支持系统软件,旨在协助医生和其他卫生专业人员进行决策任务和诊断患者的疾病。医疗决策支持系统缩短了诊断时间,提高了诊断的准确性。诊断先天性心隔缺损的临床检查之一是通过胸片检查心脏的大小、位置和形状。为了诊断先天性心隔缺损,医生分析胸部x光片并提取心脏大小测量等特征。但对医生来说,人工提取特征和诊断是一项艰巨的任务。因此,本研究开发了一种利用图像处理技术自动分析和提取胸部x线图像特征的算法。同时,利用反向传播神经网络模型,建立了基于胸片特征的先天性心隔缺损诊断决策支持系统。使用Delta学习规则对网络进行训练。在MATLAB中实现了具有GUI特征的特征提取算法和决策支持系统。
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引用次数: 1
A Literature Survey and Classification Framework of TRIZ Methodology TRIZ方法论的文献综述与分类框架
Pulkit Sharma, R. Khanna, Vishal Bhatnagar
TRIZ is an emerging theory which deals with innovative solutions to the problems challenging the industry. Though originally developed for machine designing purposes to remove the contradictions arising in the designing, TRIZ has found its feet in other areas as well. The underlying principle of the theory-"patterns of technical evolution are repeated across industries and sciences", makes its applications limitless. Taking into account the above facts, the authors were prompted to carry out an expansive survey. A classification framework was constructed which classified the literature dealing with the TRIZ applications according to various areas. This framework will help in furthering quality research in this field and augment the work of finding its applications in other fields as well.
TRIZ是一个新兴的理论,它处理挑战行业问题的创新解决方案。虽然TRIZ最初是为机器设计目的而开发的,以消除设计中产生的矛盾,但它也在其他领域找到了自己的脚。该理论的基本原理——“技术进化的模式在各个行业和科学领域都是重复的”——使其应用变得无限。考虑到上述事实,促使作者进行一项广泛的调查。构建了一个分类框架,将涉及TRIZ应用的文献按不同领域进行分类。这一框架将有助于促进这一领域的高质量研究,并加强在其他领域寻找其应用的工作。
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引用次数: 4
期刊
2016 Second International Conference on Computational Intelligence & Communication Technology (CICT)
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