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2019 IEEE International Conference on Telecommunications and Photonics (ICTP)最新文献

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LDPC Coded OFDM OW Communication System with Coherent Optical Receiver and RF Synchronous Demodulation under Turbulent Condition 湍流条件下具有相干光接收机和射频同步解调的LDPC编码OFDM OW通信系统
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041818
B. Barua, S. Majumder
OFDM with LDPC code enhance the immunity of optical wireless (OW) correspondence frameworks to atmospheric turbulence. A novel explanatory methodology is created in this paper to assess the performances of LDPC coded OFDM OW communication system with a optical receiver that is coherently utilized and demodulation is performed using RF synchronous technique to obtain ends under turbulent environment. Analytical observation shows that LDPC coded OFDM OW communication system provides better performance compared to uncoded system and because of the introduction of local oscillators (LO) at all figured out how to stay stable significantly under turbulent conditions. Results also reveal that in a BER of 10−12 the system offers improvements from 10 to 13 dB over uncoded OFDM OW structure.
采用LDPC码的OFDM增强了光通信框架对大气湍流的抗扰性。本文创建了一种新的解释方法来评估LDPC编码OFDM OW通信系统在湍流环境下的性能,该系统使用光接收器进行相干利用,并使用射频同步技术进行解调以获得端。分析观察表明,LDPC编码的OFDM OW通信系统比未编码的系统具有更好的性能,并且由于引入了本振(LO),因此在湍流条件下能够显著保持稳定。结果还表明,在10−12的误码率下,系统比无编码OFDM OW结构提供了10到13 dB的改进。
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引用次数: 0
Fetal Arrhythmia Detection Using Fetal ECG Signal 胎儿心电信号检测胎儿心律失常
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041789
M. S. R. Pavel, Md. Rafi Islam, Asif Mohammed Siddiqee
Sudden infant death syndrome (SIDS) has remained a challenge to overcome for the medical practitioner. Among other causes, the fetal arrhythmia is accountable for a significant portion of such cases. Any heart rate of a baby above 160 bpm or below 120 bpm refers to fetal arrhythmia. In comparison with various diagnostic methodology, ECG is a low-cost non-invasive method which measures the electrical activity of the heart. Thus, to detect fetal arrhythmia, we developed an ECG signal feature extracting algorithm and extracted eight significant features of the fetal ECG signal. Based on these features, Kernel Support Vector Machine (SVM) classifier with Gaussian Kernel was utilised to detect fetal arrhythmia. For evaluating the learning model, we used the leave one out (LOO) cross-validation. The final result displayed accuracy of 83.33% with 91.67% specificity and 75% sensitivity. Thus, this research shows a way of developing a unique non-invasive and low-cost fetal arrhythmia diagnosis method.
婴儿猝死综合症(SIDS)仍然是医疗从业者需要克服的挑战。在其他原因中,胎儿心律失常占这类病例的很大一部分。婴儿的心率高于每分钟160次或低于每分钟120次是指胎儿心律失常。与各种诊断方法相比,心电图是一种低成本、无创的测量心脏电活动的方法。因此,为了检测胎儿心律失常,我们开发了一种心电信号特征提取算法,提取了胎儿心电信号的8个显著特征。基于这些特征,采用高斯核支持向量机分类器对胎儿心律失常进行检测。为了评估学习模型,我们使用了留一交叉验证(LOO)。最终结果显示准确率为83.33%,特异性为91.67%,敏感性为75%。因此,本研究为开发一种独特的无创、低成本的胎儿心律失常诊断方法提供了一条途径。
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引用次数: 11
Highly Sensitive Surface Plasmon Resonance Based Photonic Crystal Fiber Refractive Index Sensor 基于表面等离子体共振的高灵敏度光子晶体光纤折射率传感器
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041810
Md. Sadman Sakib, Md. Yousufali, Dilruba Bilkish
This paper represents a highly sensitive octagonal lattice photonic crystal fiber (PCF) for refractive index (RI) sensing. Gold is externally coated to support surface plasmons which is chemically stable. The numerical investigations are based on finite element method which show that the maximum wavelength and amplitude sensitivity of the proposed sensor is 28,000 nm/RIU and 1962.63 RIU−1 respectively in x polarization for a wide sensing range from 1.35 to 1.44. Besides, the maximum confinement loss of 0.28617 dB/cm as well as the highest refractive index resolution of 3.57×10−6 RIU in x polarization are gained for this biosensor. This suggested design can acts as a favourable device for detecting any unknown biochemical and biomolecule analytes as it provides high sensitivity, great sensing resolution and low loss.
介绍了一种用于折射率传感的高灵敏度八角形晶格光子晶体光纤。金在外部涂覆以支持表面等离子体,这是化学稳定的。基于有限元法的数值研究表明,该传感器在x极化下的最大波长和振幅灵敏度分别为28,000 nm/RIU和1962.63 RIU−1,传感范围为1.35 ~ 1.44。此外,该传感器的最大约束损耗为0.28617 dB/cm, x偏振的最高折射率分辨率为3.57×10−6 RIU。该设计可作为检测任何未知生化和生物分子分析物的有利设备,因为它具有高灵敏度,高传感分辨率和低损耗。
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引用次数: 0
Comparative Study on Perovskite Solar Cells Using Inorganic Transport Layers 无机传输层钙钛矿太阳能电池的对比研究
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041784
I. Kabir, S. A. Mahmood
In this paper, a numerical analysis of organo-halide based planar n-i-p perovskite solar cell (PSC) has been presented using Solar Cell Capacitance Simulator (SCAPS-1D). The performance of the FTO/Ti02/perovskite/CZTS PSC structure has been investigated by varying the thickness of the absorber layer. That the doping density of the absorber layer affects the PSC performance has been investigated using SCAPS simulation. Considering an absorber thickness of 220 nm and absorber doping density of 1015 cm−3, the PSC performance is also investigated for various electron/hole transporting materials (ETMs/HTMs). It has been found that the properties of HTM affect the PSC performance more significantly than that of ETM. Finally, it is observed that CZTS based PSC shows better performance than the CIGS based PSC.
本文利用太阳电池电容模拟器(SCAPS-1D)对有机卤化物基平面n-i-p钙钛矿太阳电池(PSC)进行了数值分析。通过改变吸收层厚度,研究了FTO/ tio2 /钙钛矿/CZTS PSC结构的性能。利用SCAPS模拟研究了吸收层掺杂密度对PSC性能的影响。考虑到吸收剂厚度为220 nm,吸收剂掺杂密度为1015 cm−3,研究了各种电子/空穴传输材料(ETMs/HTMs)的PSC性能。研究发现HTM的性能对PSC性能的影响比对ETM的影响更显著。最后,观察到基于CZTS的PSC比基于CIGS的PSC表现出更好的性能。
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引用次数: 3
Low Loss Topas Based Single Mode Photonic Crystal Fiber for THz Wave Propagation 基于低损耗Topas的太赫兹波传输单模光子晶体光纤
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041723
Mohammad S. Islam, Md. Anwar Sadath, M. Faisal
A suspended topas based porous-core fiber with square lattice-shaped core is proposed in this design. To obtain low loss waveguide in THz it is now a challenge cause most of the materials are highly absorbent to THz waves. We propose a design that shows an extremely low effective material loss (EML) of only 0.017 cm−1 for 330µm core length at 1.0 THz operating frequency. The proposed design exhibits a negligible confinement loss of only 4.011 ×10−05 cm−1 and low dispersion at the optimal design parameters. We also have discussed single-modeness and the power fraction and thoroughly.
本设计提出了一种具有方形晶格型纤芯的悬浮topas基多孔纤芯。由于大多数材料对太赫兹波具有高吸收性,因此在太赫兹下获得低损耗波导是目前面临的一个挑战。我们提出了一种设计,在1.0太赫兹工作频率下,在330µm的芯长下,有效材料损耗(EML)仅为0.017 cm−1。在最佳设计参数下,所提出的设计具有可忽略不计的约束损耗,仅为4.011 ×10−05 cm−1,并且色散较低。我们还深入地讨论了单模态和功率分数。
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引用次数: 1
Absorption Enhancement of GaAs Slab with Geometrically Varying Periodic Array of SiO2 Nanostructures 几何变化周期阵SiO2纳米结构对GaAs板吸收的增强作用
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041828
M. M. Hassan, M. H. Murad, Tama Fouzder, Sameia Zaman, Md. Zunaid Baten
In this work we present a systematic study on absorption enhancement in thin-film GaAs slabs having two-dimensional periodic arrays of SiO2 nanostructures. Nanostructures in the form of circle, square and triangles having dimensions ranging from 50 nm to 120 nm are considered to be periodically embedded into GaAs slabs having thicknesses ranging from 100 nm to 500 nm. Finite difference time domain based analysis of these structures, which essentially constitute two-dimensional photonic crystals, show that the peak absorption characteristics of the enhanced absorption profile are in fact intricately related to the curvature of the nanostructure. Increased optical path length with increasing curvature results in the highest absorption in circular arrays, whereas about 20% lower peak absorption is obtained in thin-films having triangular arrays. A quantitative estimate of curvature is presented in this work, which appears to be in direct correlation with the peak absorptions obtained for different nanostructures. Also for small curvatures of the nanostructures, their size variation appears to have less of an effect on the overall absorption profile. Moreover, absorption characteristics of the thin film appear to be less dependent on its thickness if the curvature of the nanostructures is decreased. For all geometrical shapes however, increasing film thickness results in an increase of the bandwidth of the absorption profile. It is envisaged that the results presented here will serve as guidelines for photon-management employing easily realizable photonic structures in high-efficiency thin-film solar cells.
在这项工作中,我们提出了一个系统的研究吸收增强薄膜的二氧化硅纳米结构的二维周期阵列的GaAs板。尺寸从50纳米到120纳米的圆形、正方形和三角形纳米结构被认为周期性地嵌入到厚度从100纳米到500纳米的砷化镓板中。基于时域有限差分的分析表明,这些结构本质上构成了二维光子晶体,增强吸收谱的峰吸收特性实际上与纳米结构的曲率有关。随着曲率的增加,光程长度的增加导致圆形阵列的最高吸收,而在具有三角形阵列的薄膜中获得约20%的低峰吸收。在这项工作中提出了曲率的定量估计,这似乎与不同纳米结构获得的峰值吸收直接相关。同样,对于小曲率的纳米结构,它们的尺寸变化似乎对整体吸收谱的影响较小。此外,如果纳米结构的曲率减小,薄膜的吸收特性似乎不太依赖于其厚度。然而,对于所有几何形状,增加薄膜厚度导致吸收剖面带宽的增加。设想本文的结果将为在高效薄膜太阳能电池中使用易于实现的光子结构的光子管理提供指导。
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引用次数: 0
Four-mode filter for mode division multiplexing optical communication systems 用于模分复用光通信系统的四模滤波器
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041832
Md Mazed Rayhan Shuvo, Sazin Mohammad Aftab Ullah, Mohammed Istiaque Reja, K. Ahmmed
Handling multiple spatial modes using mode-division multiplexing (MDM) on the platform of integrated photonic chip enables unprecedented communication bandwidth scaling for on chip communication. Significant research effort has been done in past decades on MDM system for exploring efficient mode handling devices. In this paper we have proposed a higher order mode pass filter which has the provision of handling four different modes and pass the highest order mode among them. This four mode filter unfolds multiple modes to deal with which can provide a more flexible operation of MDM system.
在集成光子芯片平台上使用模分复用(MDM)处理多个空间模式,为片上通信提供了前所未有的通信带宽扩展。在过去的几十年里,人们对MDM系统进行了大量的研究,以探索高效的模式处理设备。本文提出了一种高阶模式通滤波器,它可以处理四种不同的模式,并通过其中的最高阶模式。这个四模式过滤器展开多种模式来处理,可以为MDM系统提供更灵活的操作。
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引用次数: 0
Highly Sensitive Plasmonic Biosensor on Photonic Crystal Fiber 光子晶体光纤高灵敏度等离子体生物传感器
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041694
Iffat Mahmud, Kamrun Nahar Shushama, Abdul Khaleque, A. Paul, S. Hossain, M. Hossain
This paper presents a biosensor based on photonic crystal fiber and surface plasmon resonance. The plasmonic metal and the sample are placed outside the fiber to enhance the sensitivity. The presented biosensor numerically exhibits the maximum wavelength sensitivity of 19,000 nm/RIU and 7000 nm/RIU for $y$- and $x$- polarization, respectively. In addition, the achieved maximum amplitude sensitivity of the device are 3086.17 RIU−1 and 2629.81 RIU−1 for $y$- and $x$-polarized mode, respectively. Besides that, the wavelength and amplitude resolution of the sensor are obtained as 5.26×10−6 RIU and 3.24×10−6 RIU, respectively. The sensing range of the biosensor is from sample refractive index of 1.33 to 1.41. Due to the high sensitivity and higher resolution, the propounded biosensor may be an auspicious contestant for unspecified biological and biochemical sample identification.
提出了一种基于光子晶体光纤和表面等离子体共振的生物传感器。等离子体金属和样品被放置在光纤外面以提高灵敏度。该传感器在y -和x -极化下的最大波长灵敏度分别为19000 nm/RIU和7000 nm/RIU。此外,该器件在y -和x -极化模式下的最大振幅灵敏度分别为3086.17 RIU−1和2629.81 RIU−1。此外,传感器的波长和振幅分辨率分别为5.26×10−6 RIU和3.24×10−6 RIU。该生物传感器的传感范围为样品折射率为1.33 ~ 1.41。由于高灵敏度和高分辨率,所提出的生物传感器可能是未知生物和生化样品鉴定的吉祥竞争者。
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引用次数: 0
Hollow-core Photonic Crystal Fiber Sensor for Refractive Index Sensing 用于折射率传感的空心光子晶体光纤传感器
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041790
Shihab Ahmed, J. R. Mou, Md. Aslam Mollah, Niloy Debnath
In this work, a refractive index sensor based on hollow-core photonic crystal fiber (HC-PCF) with hexagonal shaped cladding is proposed. The sensing performance of the proposed sensor is evaluated by the finite element method (FEM) for two different core geometry (circular and hexagonal) and sorbitol is used as sensing sample. Simulation results show that the proposed sensor exhibits relatively high sensitivity of 96.198 % and 94.124 % for circular and hexagonal shaped core, respectably, at operating wavelength of 1.25 µm, In addition, the confinement loss of the proposed sensor is as low as 2.24×10−09 and 1.67×10−10 dB/m for circular and hexagonal shaped core, respectively. Owing to having good sensing performance, the proposed sensor can be competent for sorbitol sensing.
本文提出了一种基于六角形包层中空光子晶体光纤(HC-PCF)的折射率传感器。以山梨醇为传感样品,采用有限元法对两种不同芯型(圆形和六角形)的传感性能进行了评价。仿真结果表明,在工作波长为1.25µm时,该传感器对圆形和六角形磁芯的灵敏度分别为96.198 %和94.124 %,约束损耗分别为2.24×10−09和1.67×10−10 dB/m。该传感器具有良好的传感性能,可用于山梨糖醇的传感。
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引用次数: 4
Network Intrusion Detection System Using Voting Ensemble Machine Learning 基于投票集成机器学习的网络入侵检测系统
Pub Date : 2019-12-01 DOI: 10.1109/ICTP48844.2019.9041736
Md. Raihan-Al-Masud, H. Mustafa
Due to increasing amount of cyber attack, there is a growing demand for Network intrusion detection systems (NIDSs) which are necessary for defending from potential attacks. Detecting and preventing cyber attacks is one of the key research areas. Existing NIDSs use traditional machine learning algorithms with low accuracy and are also not suitable for the new unknown cyber attacks. In this paper, we propose a NIDS model with ensemble machine learning methods. Ensemble machine learning methods have the potential to detect and prevent different types of attacks compared to traditional machine learning methods. Our proposed system can detect known attacks as well as can prevent unknown attacks. Our proposed system uses ensemble machine learning methods with Voting. We used the full NSL-KDD dataset to evaluate the performance of multiclass classification and we also compare the performance with deep learning as well as traditional base level machine learning techniques. Experimental results show that the proposed NIDS system is superior to the performance of existing methods. Our model improves the detection rate of the IDS which is vital for network intrusion detection systems.
由于网络攻击的数量不断增加,对网络入侵检测系统(nids)的需求不断增长,这是防御潜在攻击所必需的。网络攻击的检测与预防是网络安全研究的重点领域之一。现有的网络入侵防御系统使用传统的机器学习算法,准确率较低,也不适合新的未知网络攻击。在本文中,我们提出了一个集成机器学习方法的NIDS模型。与传统的机器学习方法相比,集成机器学习方法具有检测和预防不同类型攻击的潜力。该系统既能检测已知攻击,又能防止未知攻击。我们提出的系统使用集成机器学习方法与投票。我们使用完整的NSL-KDD数据集来评估多类分类的性能,并将其与深度学习以及传统的基础级机器学习技术进行了比较。实验结果表明,所提出的NIDS系统的性能优于现有的方法。该模型提高了入侵检测系统的检测率,这对网络入侵检测系统至关重要。
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引用次数: 6
期刊
2019 IEEE International Conference on Telecommunications and Photonics (ICTP)
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