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Millimetre wave 3-D channel modelling for next generation 5G networks 下一代5G网络的毫米波三维信道建模
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022003
Latih Saba'neh, Obada Al-Khatib
Millimetre wave (mm-wave) spectrum (30-300GHz) is a key enabling technology in the advent of 5G. However, an accurate model for the mm-wave channel is yet to be developed as the existing 4G-LTE channel models (frequency below 6 GHz) exhibit different propagation attributes. In this paper, a spatial statistical channel model (SSCM) is considered that estimates the characteristics of the channel in the 28, 60, and 73 GHz bands. The SSCM is used to mathematically approximate the propagation path loss in different environments, namely, Urban-Macro, Urban-Micro, and Rural-Macro, under Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) conditions. The New York University (NYU) channel simulator is utilised to evaluate the channel model under various conditions including atmospheric effects, distance, and frequency. Moreover, a MIMO system has been evaluated under mm-wave propagation. The main results show that the 60 GHz band has the highest attenuation compared to the 28 and 73 GHz bands. The results also show that increasing the number of antennas is proportional to the condition number and the rank of the MIMO channel matrix.
毫米波(mm-wave)频谱(30-300GHz)是5G到来的关键使能技术。然而,由于现有的4G-LTE信道模型(频率低于6 GHz)具有不同的传播属性,因此尚未开发出精确的毫米波信道模型。本文考虑了一种空间统计信道模型(SSCM)来估计28ghz、60ghz和73ghz频段的信道特性。SSCM用于在不同的环境下,即城市-宏观、城市-微观和农村-宏观,在视距(LOS)和非视距(NLOS)条件下的传播路径损失的数学近似。利用纽约大学(NYU)的信道模拟器来评估各种条件下的信道模型,包括大气效应、距离和频率。此外,还对MIMO系统在毫米波传播下的性能进行了评估。主要结果表明,与28 GHz和73 GHz频段相比,60 GHz频段的衰减最大。结果还表明,天线数量的增加与MIMO信道矩阵的条件数和秩成正比。
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引用次数: 1
Analytical models of threshold voltage and drain induced barrier lowering in junctionless cylindrical surrounding gate (JLCSG) MOSFET using stacked high-k oxide 高k氧化物堆积式无结圆柱环绕栅MOSFET阈值电压和漏极势垒降低的分析模型
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022007
H. Jung

We proposed the analytical models to analyze shifts in threshold voltage and drain induced barrier lowering (DIBL) when the stacked SiO2/high-k dielectric was used as the oxide film of Junctionless Cylindrical Surrounding Gate (JLCSG) MOSFET. As a result of comparing the results of the presented model with those of TCAD, it was a good fit, thus proving the validity of the presented model. It could be found that the threshold voltage increased, but DIBL decreased by these models as the high-k dielectric constant increased. However, the shifts of threshold voltage and DIBL significantly decreased as the high-k dielectric constant increased. As for the degree of reduction, the channel length had a greater effect than the thickness of the high-k dielectric, and the shifts of threshold voltage and DIBL were kept almost constant when the high-k dielectric constant was 20 or higher. Therefore, the use of dielectrics such as HfO2/ZrO2, La2O3, and TiO2 with a dielectric constant of 20 or more for stacked oxide will be advantageous in reducing the short channel effect. In conclusion, these models were able to sufficiently analyze the threshold voltage and DIBL.

本文提出了用SiO2/高k介电材料作为无结圆柱围绕栅(JLCSG) MOSFET的氧化膜时阈值电压变化和漏极诱导势垒降低(DIBL)的分析模型。将模型的结果与TCAD的结果进行了比较,结果吻合良好,从而证明了模型的有效性。可以发现,随着高k介电常数的增加,这些模型的阈值电压增加,而DIBL降低。但随着高k介电常数的增大,阈值电压和DIBL的位移明显减小。对于降低程度,通道长度的影响大于高k介电介质厚度的影响,当高k介电常数为20或更高时,阈值电压和DIBL的位移基本保持不变。因此,使用介电常数为20或以上的HfO2/ZrO2、La2O3和TiO2等介质作为堆叠氧化物将有利于减少短通道效应。综上所述,这些模型能够充分分析阈值电压和DIBL。
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引用次数: 0
Analysis of drain induced barrier lowering for junctionless double gate MOSFET using ferroelectric negative capacitance effect 利用铁电负电容效应降低无结双栅极MOSFET漏极感应势垒的分析
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2023003
H. Jung
We analyze the drain induced barrier lowering (DIBL) of a negative capacitance (NC) FET using a gate structure such as a metal-ferroelectric-metal-insulator-semiconductor (MFMIS) for a junctionless double gate (JLDG) FET. NC FETs show negative DIBL characteristics according to the ferroelectric thickness. To elucidate the cause of such negative DIBL, the DIBLs are obtained by the second derivative method using the 2D potential distribution and drain current-gate voltage curve. The analytical DIBL model is also presented for easy observation of the DIBL of NC FET. It has been found that the results of this analytical DIBL model are very similar to those of the second derivative method. The results of this analytical DIBL model are also in good agreement with the results of TCAD. As a result, it was found that the negative DIBL phenomenon is caused by the change according to the drain voltage of the charge existing in the ferroelectric material. The negative DIBL phenomenon easily occurred as the ferroelectric thickness increased and the thickness of SiO2 used as an insulator decreases.
我们分析了采用金属-铁电-金属-绝缘体-半导体(MFMIS)等栅极结构的无结双栅场效应管(JLDG)的负电容场效应管(NC)的漏极诱导势垒降低(DIBL)。根据铁电厚度的不同,NC场效应管表现出负的DIBL特性。为了阐明这种负DIBL的原因,利用二维电位分布和漏极电流-栅极电压曲线,采用二阶导数法得到了DIBL。为了便于观察NC场效应管的DIBL,还提出了解析DIBL模型。结果表明,该解析型DIBL模型的计算结果与二阶导数法的计算结果非常相似。该分析DIBL模型的结果与TCAD的结果也很吻合。结果发现,负DIBL现象是由于铁电材料中电荷的漏极电压随漏极电压的变化而引起的。随着铁电厚度的增加和作为绝缘子的SiO2厚度的减小,容易出现负DIBL现象。
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引用次数: 0
Intelligence-based optimized cognitive radio routing for medical data transmission using IoT 基于智能优化的认知无线电路由,用于物联网医疗数据传输
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022014
B. Kumar, Jai Sukh Paul Singh
The Internet of Things (IoT) is considered an effective wireless communication, where the main challenge is to manage energy efficiency, especially in cognitive networks. The data communication protocol is a broadly used approach in a wireless network based IoT. Cognitive Radio (CR) networks are mainly concentrated on battery-powered devices for highly utilizing the data regarding the spectrum and routing allocation, dynamic spectrum access, and spectrum sharing. Data aggregation and clustering are the best solutions for enhancing the energy efficiency of the network. Most researchers have focused on solving the problems related to Cognitive Radio Sensor Networks (CRSNs) in terms of Spectrum allocation, Quality of Service (QoS) optimization, delay reduction, and so on. However, a very small amount of research work has focused on energy restriction problems by using the switching and channel sensing mechanism. As this energy validation is highly challenging due to dependencies on various factors like scheduling priority to the registered users, the data loss rate of unlicensed channels, and the possibilities of accessing licensed channels. Many IoT-based models involve energy-constrained devices and data aggregation along with certain optimization approaches for improving utilization. In this paper, the cognitive radio framework is developed for medical data transmission over the Internet of Medical Things (IoMT) network. The energy-efficient cluster-based data transmission is done through cluster head selection using the hybrid optimization algorithm named Spreading Rate-based Coronavirus Herding-Grey Wolf Optimization (SR-CHGWO). The network lifetime is improved with a cognitive- routing based on IoT framework to enhance the efficiency of the data transmission through the multi-objective function. This multi-objective function is derived using constraints like energy, throughput, data rate, node power, and outage probability delay of the proposed framework. The simulation experiments show that the developed framework enhances the energy efficiency using the proposed algorithm when compared to the conventional techniques.
物联网(IoT)被认为是一种有效的无线通信,其主要挑战是管理能源效率,特别是在认知网络中。数据通信协议是基于无线网络的物联网中广泛使用的方法。认知无线电(Cognitive Radio, CR)网络主要集中在电池供电的设备上,用于频谱和路由分配、动态频谱接入和频谱共享等方面的数据高效利用。数据聚合和聚类是提高网络能效的最佳解决方案。认知无线电传感器网络(CRSNs)的频谱分配、服务质量(QoS)优化、时延降低等问题是目前研究的重点。然而,很少有研究工作集中在利用开关和通道传感机制的能量限制问题上。由于依赖于各种因素,如注册用户的调度优先级,未许可通道的数据损失率以及访问许可通道的可能性,因此这种能量验证非常具有挑战性。许多基于物联网的模型涉及能量受限的设备和数据聚合,以及提高利用率的某些优化方法。本文针对医疗物联网(IoMT)网络上的医疗数据传输,开发了认知无线电框架。采用基于传播率的冠状病毒羊群-灰狼优化(SR-CHGWO)混合优化算法,通过簇头选择实现高效的聚类数据传输。采用基于物联网框架的认知路由提高网络生存期,通过多目标函数提高数据传输效率。该多目标函数是使用所提出框架的能量、吞吐量、数据速率、节点功率和中断概率延迟等约束导出的。仿真实验表明,与传统算法相比,所开发的框架提高了能效。
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引用次数: 0
Highly sensitive optical MEMS based photonic biosensor for colon tissue detection 用于结肠组织检测的高灵敏度光学MEMS光子生物传感器
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022017
M. V. Raghunathareddy, G. Indumathi, K. R. Niranjan
Biological component of cells, protein has been effectively studied and investigated using biological sensors. Photonic crystal-based sensor is highly sensitive optical nanostructure it can be manipulated to affect the motion of photon for users' application. In the proposed work microcavity based photonic crystal biosensor has been designed and investigated for its different optical sensing evaluation parameters such as transmission efficiency, sensitivity, Q factor and peak resonant wavelengths. Sensor is designed and analyzed for early detection of colon cancer tissues in blood. Radius of defect micropillar has been increased from 0.16 µm to 0.19 µm. High Quality factor 10232 has been achieved with the micro pillar radius of 0.17 µm and sensitivity 700nm/RIU. Similarly, radius of 0.16 µm, 0.18 µm and 0.19 µm has attained quality factor and sensitivity such as 5324, 7232, 8343 and 111 nm/RIU, 320 nm/RIU and 340 nm/RIU respectively. Compared other work in literature, proposed work has shown better sensing capability. Designed sensor has shown remarkable output and feasibility for future fabrication.
利用生物传感器对细胞的生物成分、蛋白质进行了有效的研究。基于光子晶体的传感器是一种高灵敏度的光学纳米结构,它可以被操纵来影响光子的运动,以供用户使用。本文设计了基于微腔的光子晶体生物传感器,并对其不同的光传感评价参数如传输效率、灵敏度、Q因子和峰值谐振波长进行了研究。针对血液中结肠癌组织的早期检测,设计并分析了传感器。缺陷微柱半径由0.16µm增加到0.19µm。微柱半径为0.17µm,灵敏度为700nm/RIU,质量因数为10232。同样,半径为0.16µm、0.18µm和0.19µm时,质量因子和灵敏度分别为5324、7232、8343和111 nm/RIU, 320 nm/RIU和340 nm/RIU。与其他文献相比,本文所提出的方法具有更好的感知能力。所设计的传感器显示出显著的输出和未来制造的可行性。
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引用次数: 0
Improved DTC strategy with fuzzy logic controller for induction motor driven electric vehicle 基于模糊控制器的感应电机驱动电动汽车直接转矩控制改进策略
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022018
Sahoo Anjan Ku., Jena Ranjan Ku.
In the near future, zero-emission transportation is anticipated to be implemented in an effort to reduce the major pollutants caused by road transportation. This enormous endeavor will be impossible until all modes of transport are electrified. The induction motor-fed direct torque controller is widely used for EV applications due to its fast torque response and simplicity. However, ripples in torque and flux and current harmonics are the major issues related to DTC. The fuzzy-based DTC replaces the hysteresis comparators and the switching table with fuzzy logic blocks to realize fuzzy DTC control, which improves the system's performance. This paper presents an enhanced fuzzy logic control strategy of induction motor for electric vehicle applications. The main objective is to enhance the system's performance by reducing torque and flux ripples. Both the conventional and fuzzy-based DTC are simulated with MATLAB/SIMULINK, followed by a comparative assessment to validate the effectiveness of the proposed approach for both steady-state and transient operations. The results indicate improvements in torque ripple, flux ripple, and speed ripples by 69%, 10%, and 85%, respectively. Due to the reduction in ripples, there is also an improvement in the THD of the stator current by 17%. During transient, an average improvement of integral square error for torque and speed is 8% and 12%, respectively. Further, the proposed method is validated using EUDC and HWFET drive cycles, demonstrating a reduction in battery energy demand.
在不久的将来,预计将实施零排放运输,以减少道路运输造成的主要污染物。在所有的交通工具都实现电气化之前,这一巨大的努力是不可能实现的。感应电机直接转矩控制器以其快速的转矩响应和简单的控制方法在电动汽车中得到了广泛的应用。然而,转矩和磁链的波动以及电流谐波是与直接转矩控制相关的主要问题。用模糊逻辑块代替滞后比较器和开关表,实现模糊直接转矩控制,提高了系统的性能。本文提出了一种用于电动汽车的感应电动机的增强型模糊逻辑控制策略。主要目标是通过减少转矩和磁链波动来提高系统的性能。利用MATLAB/SIMULINK对传统和基于模糊的直接转矩控制进行了仿真,并通过对比评估验证了所提方法在稳态和暂态工况下的有效性。结果表明,转矩脉动、磁链脉动和速度脉动分别改善了69%、10%和85%。由于波纹的减少,定子电流的THD也提高了17%。在瞬态过程中,转矩和转速的积分平方误差平均改善8%和12%。此外,采用EUDC和HWFET驱动循环验证了所提出的方法,证明了电池能量需求的降低。
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引用次数: 5
A novel approach for the classification of diabetic maculopathy using discrete wavelet transforms and a support vector machine 基于离散小波变换和支持向量机的糖尿病黄斑病变分类新方法
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2023001
M. Bangar, P. Chaudhary
The role of diabetes mellitus in deteriorating the visual health of diabetic subjects has been affirmed precisely. The study of morphological features near the macular region is the most common method of investigating the impairment rate. The general mode of diagnosis carried out by manual inspection of fundus imaging, is less effective and slow. The goal of this study is to provide a novel approach to classify optical coherence tomography images effectively and efficiently. discrete wavelet transform and fast fourier transform are utilized to extract features, and a kernel-based support vector machine is used as classifier. To improve image contrast, histogram equalization is performed. Segmentation of the enhanced images is performed using k-means clustering. The hybrid feature extraction technique comprising the discrete wavelet transform and fast fourier transform renders novelty to the study. In terms of classification accuracy, the system's efficiency is compared to that of earlier available techniques. The suggested approach attained an overall accuracy of 96.46 % over publicly available datasets. The classifier accuracy of the system is found to be better than the performance of the discrete wavelet transform with self organizing maps and support vector machines with a linear kernel.
糖尿病在糖尿病患者视觉健康恶化中的作用已得到准确的肯定。研究黄斑区附近的形态学特征是研究损伤率最常用的方法。一般的诊断模式是通过人工检查眼底成像进行的,效果较差,速度较慢。本研究的目的是提供一种新的方法来对光学相干断层扫描图像进行有效的分类。采用离散小波变换和快速傅立叶变换提取特征,采用基于核的支持向量机作为分类器。为了提高图像对比度,进行了直方图均衡化。使用k-means聚类对增强图像进行分割。由离散小波变换和快速傅立叶变换组成的混合特征提取技术为研究提供了新的思路。在分类精度方面,系统的效率与早期可用的技术进行了比较。建议的方法在公开可用的数据集上获得了96.46%的总体准确率。该系统的分类精度优于自组织映射离散小波变换和线性核支持向量机的分类精度。
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引用次数: 0
Compact EBG structure for ground bounce noise suppression in high-speed digital systems 用于高速数字系统地弹跳噪声抑制的紧凑EBG结构
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022008
Vasudevan Karuppiah, UmaMaheswari Gurusamy
This paper proposes Inductive Enhanced-Electromagnetic Bandgap (IE-EBG) structure to suppress the Ground Bounce Noise (GBN) for high-speed digital system applications. The GBN excited between the power and ground plane pair could be a source of interference to the adjacent analog IC's on the same PCB (or) nearby devices because of radiated emission from the PCB edges. Hence, it must be suppressed at the PCB level. The proposed two-dimensional IE-EBG patterned power plane suppressed the GBN effectively over a broad frequency range. The four unit-cell IE-EBG provides a -40 dB noise suppression bandwidth of 13.567 GHz. With a substantial increment in the overall area, the nine unit-cell IE-EBG provides a -50 dB bandwidth of 19.02 GHz. The equivalent circuit modeling was developed for nine unit-cell IE-EBG and results are verified with the 3D EM simulation results. In addition, dispersion analysis was performed on the IE-EBG unit-cell to validate the lowest cut-off frequency and bandgap range. The prototype model of the proposed IE-EBG is fabricated and tested. The measured and simulated results are compared; a negligible variation is observed between them. In a multilayer PCB, the solid power plane is replaced with the 1 x 4 IE-EBG power plane and its impact on high-speed data transmission is analyzed with single-ended/differential signaling. The embedded IE-EBG with differential signaling provides optimum MEO and MEW values of 0.928 V, 0.293 ns for a random binary sequence with the 0.1 ns rise-time. Compared to single-ended signaling, embedded IE-EBG with differential signaling maintain good signal integrity and supports high-speed data transmission.
本文提出了一种用于高速数字系统的电感增强电磁带隙(IE-EBG)结构来抑制地面弹跳噪声(GBN)。由于PCB边缘的辐射发射,在电源和地平面对之间激发的GBN可能成为同一PCB(或)附近设备上相邻模拟IC的干扰源。因此,它必须在PCB级被抑制。所提出的二维IE-EBG图形功率平面在较宽的频率范围内有效抑制了GBN。四单元IE-EBG提供13.567 GHz的-40 dB噪声抑制带宽。随着总体面积的大幅增加,9个单元的IE-EBG提供19.02 GHz的-50 dB带宽。建立了等效电路模型,并与三维电磁仿真结果进行了验证。此外,对IE-EBG单元进行色散分析,验证了最低截止频率和带隙范围。制作并测试了所提出的IE-EBG原型模型。对实测结果和模拟结果进行了比较;它们之间的差异可以忽略不计。在多层PCB中,将固态电源平面替换为1 × 4 IE-EBG电源平面,并通过单端/差分信令分析其对高速数据传输的影响。对于上升时间为0.1 ns的随机二值序列,带差分信号的嵌入式IE-EBG提供了0.928 V、0.293 ns的最佳MEO和MEW值。与单端信令相比,带差分信令的嵌入式IE-EBG保持了良好的信号完整性,支持高速数据传输。
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引用次数: 1
Internet of Things for smart energy systems: A review on its applications, challenges and future trends 智能能源系统的物联网:应用、挑战和未来趋势综述
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2023004
E. F. Orumwense, K. Abo-Al-Ez
Internet of Things (IoT) is a terminology used for a mixed connection of heterogeneous objects to the internet and to each other with the employment of recent technological and communication infrastructures. Its incorporation into engineering systems have gradually become very popular in recent times as it promises to transform and ease the life of end users. The use of IoT in smart energy systems (SES) facilitates an ample offer of variety of applications that transverses through a wide range of areas in energy systems. With the numerous benefits that includes unmatched fast communication between subsystems, the maximization of energy use, the decrease in environmental impacts and a boost in the dividends of renewable energies, IoT has grown into an emerging innovative technology to be integrated into smart energy systems. In this work, we have provided an overview of the link between SES, IoT and Internet of Energy (IoE). The main applications of IoT in smart energy systems consisting of smart industries, smart homes and buildings, and smart cities are explored and analyzed. The paper also explores the challenges limiting the employment of IoT technologies in SES and the possible remedies to these challenges. In addition, the future trends of this technology, its research direction and reasons why industry should adopt it are also addressed. The aim of this work is to furnish researchers in this field, decision and energy policy makers, energy economist and energy administrators with a possible literature outline on the roles and impacts of IoT technology in smart energy systems.
物联网(IoT)是一个术语,用于使用最新的技术和通信基础设施将异构对象与互联网以及彼此之间的混合连接。近年来,将其纳入工程系统已逐渐变得非常流行,因为它有望改变和简化最终用户的生活。在智能能源系统(SES)中使用物联网有助于提供各种各样的应用,这些应用横跨能源系统的各个领域。物联网具有诸多优势,包括子系统之间无与伦比的快速通信、能源使用最大化、环境影响减少和可再生能源红利的增加,物联网已发展成为一种新兴的创新技术,可以集成到智能能源系统中。在这项工作中,我们概述了SES,物联网和能源互联网(IoE)之间的联系。探讨和分析了物联网在智能工业、智能家居和智能建筑、智能城市等智能能源系统中的主要应用。本文还探讨了限制在SES中使用物联网技术的挑战以及应对这些挑战的可能补救措施。此外,还讨论了该技术的未来趋势、研究方向以及工业采用该技术的原因。这项工作的目的是为该领域的研究人员、决策和能源政策制定者、能源经济学家和能源管理者提供关于物联网技术在智能能源系统中的作用和影响的可能的文献概述。
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引用次数: 6
Power line communication: A review on couplers and channel characterization 电力线通信:耦合器和信道特性的综述
Q3 Engineering Pub Date : 2022-01-01 DOI: 10.3934/electreng.2022016
M. Giraneza, K. Abo-Al-Ez
Powerline communication is gaining momentum with the rise of the smart grid, the Internet of Things as part of the 4th industrial revolution and associated applications such as transportation and energy efficiency. Coupling and channel characterization are essential parts of a power-line communication system. Therefore, understanding these components allows performance evaluation and prediction of the system. This paper presents an entire review of couplers and channel characterization modeling techniques used in narrow and broadband power-line communication systems. Types and applications of different couplers are presented; a review of different power-line communication channel modeling techniques and the fundamentals allows a clear understanding of factors influencing or affecting the signal propagation through the channel. The purpose of this review is to guide researchers and system designers looking for literature resources on couplers and channel characterization for power-line communication applications.
随着智能电网的兴起,作为第四次工业革命一部分的物联网以及交通和能源效率等相关应用的兴起,电力线通信正在获得动力。耦合和信道特性是电力线通信系统的重要组成部分。因此,了解这些组件可以对系统进行性能评估和预测。本文介绍了窄带和宽带电力线通信系统中使用的耦合器和信道表征建模技术的完整综述。介绍了各种耦合器的类型和应用;回顾不同的电力线通信信道建模技术和基本原理,可以清楚地了解影响或影响信号通过信道传播的因素。本综述的目的是指导研究人员和系统设计人员寻找电力线通信应用中耦合器和通道特性的文献资源。
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引用次数: 2
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AIMS Electronics and Electrical Engineering
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