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2020 International Conference on UK-China Emerging Technologies (UCET)最新文献

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A Miniaturized Printed UWB LPDA Antenna 一种小型印刷超宽频LPDA天线
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205322
S. M. Hamza, H. Ullah, F. A. Tahir
A compact design of ultra-wide band (UWB) log-periodic dipole array (LPDA) antenna printed on FR-4 substrate is presented. The proposed design consists of array of printed dipoles fed by a coaxial cable. The dimensions of the printed dipoles and the spacing between the array elements are optimized by parametric simulations using full wave simulator. The size of the fabricated LPDA antenna is 0.9 $lambda times 0.33 lambda (135 times 50 mm^{2})$. The antenna has a fractional bandwidth of 133% and covers the band from 2.2 GHz to 11 GHz. The antenna exhibits a consistent end-fire radiation patterns over the whole operating band of 2.2-11 GHz with a maximum operating gain of 8.6 dBi.
提出了一种在FR-4衬底上印刷的超宽带对数周期偶极子阵列(LPDA)天线的紧凑设计。所提出的设计包括由同轴电缆馈送的印刷偶极子阵列。利用全波模拟器进行参数化仿真,优化了印刷偶极子的尺寸和阵列元件之间的间距。制作的LPDA天线的尺寸为0.9 $lambda 乘以0.33 lambda(135 乘以50 mm^{2})$。该天线的分数带宽为133%,覆盖2.2 GHz至11 GHz的频段。该天线在2.2-11 GHz的整个工作频带内具有一致的火端辐射方向图,最大工作增益为8.6 dBi。
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引用次数: 2
Quantifying the Effects of Communication Network Performance in Vehicle-to-Grid Frequency Regulation Services 车网调频业务中通信网络性能的量化影响
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205457
I. S. Bayram
Recent advances in communication systems and the proliferation of plug-in electric vehicles (PEVs) hold a promise to support power systems operations with vehicle-togrid (V2G) applications. However, such ancillary services have tight communication requirements (low-latency, high reliability) as the aggregated PEVs need to respond to market signals within seconds and bad communication system performance lead to financial losses. In this paper, we consider a frequency regulation application in which PEVs are charged and discharged according to actual market signals. We assume that a market operator sends signals through 4G/LTE network to an aggregator located at a parking lot, who, as a next step, delivers data packets to electric vehicle supply equipments (EVSEs) via a local Wi-Fi network. In the final phase, each EVSE communicates with PEV battery management unit via power line communications. By adopting communication delay and packet loss profiles from measurement and simulation studies, we examine the impacts of communication system performance on V2G performance. The results show that packet losses significantly lowers precision score, while there is a need for faster networks if multiple aggregators participate at the same time.
通信系统的最新进展和插电式电动汽车(pev)的普及为支持车辆到电网(V2G)应用的电力系统运行提供了希望。然而,此类辅助服务具有严格的通信要求(低延迟、高可靠性),因为聚合的pev需要在数秒内响应市场信号,通信系统性能差会导致财务损失。在本文中,我们考虑了一个频率调节应用,其中pev根据实际市场信号充放电。我们假设市场运营商通过4G/LTE网络向位于停车场的聚合器发送信号,聚合器下一步通过本地Wi-Fi网络向电动汽车供电设备(evse)发送数据包。在最后阶段,每个EVSE通过电力线通信与PEV电池管理单元通信。通过采用测量和仿真研究中的通信延迟和丢包概况,我们研究了通信系统性能对V2G性能的影响。结果表明,丢包会显著降低精度分数,而如果多个聚合器同时参与,则需要更快的网络。
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引用次数: 1
Using Machine Learning to Predict the Future Development of Disease 使用机器学习来预测疾病的未来发展
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205373
Lanxin Miao, Xuezhou Guo, H. Abbas, K. Qaraqe, Q. Abbasi
The objective of this research is to develop a longterm risk model for the development of cardiovascular disease (CVD) because of type-2 diabetes (T2D). We use the support vector machine (SVM) and the K-nearest neighbours algorithms on the dataset collected from a longitudinal study called Framingham Heart Study, to develop the prediction models. The dataset was first balanced by the Synthetic Minority Oversampling Technique algorithm. The SVM algorithm was then used to train the model, and after tuning the parameters and training for 1000 times, the average accuracy to correctly predict the prevalence of CVD due to T2D came out as 96.5% and the average recall rate was 89.8%. Similarly, we also applied the KNN algorithm to train the dataset, and the recall rate even reaches 92.9%. The advantages of our model are: 1) it can predict with high accuracy both the risk of development of T2D and CVD simultaneously; 2) it can be used without the expensive and tedious oral glucose tolerance test. The model yielded high-performance results after training on the Framingham Heart Study dataset.
本研究的目的是为2型糖尿病(T2D)引起的心血管疾病(CVD)的发展建立一个长期风险模型。我们使用支持向量机(SVM)和k近邻算法对从弗雷明汉心脏研究纵向研究中收集的数据集进行开发预测模型。数据集首先通过合成少数派过采样技术算法进行平衡。然后使用SVM算法对模型进行训练,经过参数调整和1000次训练后,正确预测T2D所致CVD患病率的平均准确率为96.5%,平均召回率为89.8%。同样,我们也采用KNN算法对数据集进行训练,召回率甚至达到了92.9%。该模型的优点是:1)能够同时准确预测t2dm和CVD的发展风险;2)可省去昂贵、繁琐的口服葡萄糖耐量试验。在Framingham Heart Study数据集上训练后,该模型产生了高性能的结果。
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引用次数: 7
Emerging Technologies and Sensors That Can Be Used During the COVID-19 Pandemic 可在COVID-19大流行期间使用的新兴技术和传感器
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205424
Sagar Suresh Kumar
The spread of COVID-19, which has infected over 10 million people worldwide, entails the need for fast and aggressive testing never like before. As countries look to expanding testing, such test solutions must not only be technically sound, but should also be feasible and convenient for the user. The aim of this paper is to review the emerging tests and technology which can be potentially used to detect and assess the condition of those infected with the Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and the challenges in their development and use. The paper deals with 1) In vitro diagnostic tests(IVDs),i.e tests that use biological samples like blood and consist of 2 types: nucleic acid tests, which detect the RNA of the virus, and antibody tests which antibodies created by the body in response to the virus. 2) Chest X-Ray and CT scan devices, associated Deep Learning based detection methods and portable devices. 3) Wearable sensors, IoT and telemedicine for remote monitoring of COVID-19 patients to assess their condition, and also of Non-COVID-19 ones to reduce risks of cross-infection.
COVID-19的传播已在全球感染了1000多万人,因此需要前所未有的快速和积极的检测。随着各国希望扩大检测,这种检测解决方案不仅必须在技术上合理,而且对用户来说也应该可行和方便。本文的目的是综述可能用于检测和评估严重急性呼吸综合征冠状病毒2 (SARS-CoV-2)感染者病情的新兴检测和技术,以及它们在开发和使用中的挑战。本文涉及1)体外诊断试验(IVDs);使用血液等生物样本的测试,包括两种类型:核酸测试,检测病毒的RNA;抗体测试,检测身体对病毒产生的抗体。2)胸部x射线和CT扫描设备,相关的基于深度学习的检测方法和便携式设备。3)可穿戴传感器、物联网和远程医疗,对COVID-19患者进行远程监测,评估其病情,并对非COVID-19患者进行远程监测,降低交叉感染风险。
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引用次数: 8
A Wearable Health Monitoring System 可穿戴式健康监测系统
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205468
Haolin Fei, M. Rehman
Wearable health monitoring system gain a lot of attraction from the wearable health technology community. Among wearable health devices, smart wrist band is one of the branches that the market invested most of money and there exist varies products aiming at different custom target group such as users who have cardiovascular diseases. However, there has few products that can monitoring heart rate continuously with low power consumption and able to detect the abnormal movement of body which may lead to the diagnosis of early Parkinson’s diseases(PD).This project propose a low-power consumption, customized wrist band with small size and pattern matching ability which help to analysis the abnormal behaviour that many early PD patients have, together with a user end program for data transferring, demonstration and further analysis. Results of the wrist band and user end program are tested, verified and compared, which shows that the wrist band is able to detect heart rate, counting steps and detecting abnormal hand movement, and user end program can properly receive the information from the wrist band and present to the $user$.
可穿戴式健康监测系统受到了可穿戴健康科技界的广泛关注。在可穿戴健康设备中,智能腕带是市场投入最多的分支之一,针对不同的定制目标群体有不同的产品,比如有心血管疾病的用户。然而,目前很少有产品能够以低功耗连续监测心率,并能够检测到身体的异常运动,从而诊断早期帕金森病(PD)。本项目提出了一种低功耗、定制化的小尺寸腕带,具有模式匹配能力,可以帮助分析许多早期PD患者的异常行为,并提供了一个用户端程序,用于数据传输、演示和进一步分析。对腕带和用户端程序的结果进行了测试、验证和比较,结果表明腕带能够检测心率、计算步数和检测手部异常运动,用户端程序能够正确地接收到来自腕带的信息并呈现给用户。
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引用次数: 0
An Iterative Filtering Algorithm for HEVC Intra Prediction Combined with Prediction Mode Characteristics 结合预测模式特征的HEVC帧内预测迭代滤波算法
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205375
Zeng Li, Weiheng Sun, Shuhua Xiong, Pradeep Karn, Xiaohai He
Nowadays, the mainstream video coding standard H.265/HEVC has achieved excellent compression performance, but it still can not match the increase of huge amount of data. In order to further optimize intra prediction of HEVC, we proposed an iterative filtering algorithm which combines the characteristics of HEVC intra prediction modes. Proposed algorithm classifies PU into different types by analyzing the characteristics of different intra prediction modes. Through discrete training methods, the coefficients of each type of filters can be obtained. And multiple iterative filtering can make the prediction more accuracy. We further optimize the complexity of the algorithm to make a balance between performance and complexity. Experimental results show that proposed algorithm can achieve better coding performance compared with HEVC baseline algorithm and some latest algorithm.
目前主流的视频编码标准H.265/HEVC虽然取得了优异的压缩性能,但仍然无法满足海量数据的增长。为了进一步优化HEVC的帧内预测,我们提出了一种结合HEVC帧内预测模式特点的迭代滤波算法。该算法通过分析不同内预测模式的特点,将PU划分为不同的类型。通过离散训练方法,可以得到各类滤波器的系数。多次迭代滤波可以提高预测精度。我们进一步优化算法的复杂度,在性能和复杂度之间取得平衡。实验结果表明,与HEVC基线算法和一些最新算法相比,该算法具有更好的编码性能。
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引用次数: 0
1.3, 1.55 μm photodetector based on Ge/GaAs hetero-integration prepared by MOCVD 1.3、MOCVD制备基于Ge/GaAs异质集成的1.55 μm光电探测器
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205465
M. Xiao, S. Gong, X. Zheng, Yunjiang Jin
In this work, p-Ge/GaAs hetero-epitaxy was studied by MOCVD and a p-Ge/i-GaAs/n-GaAs photodetector structure was fabricated aiming at 1.3, 1.55 $mu$m photodetection. The photo-response spectra indicate that the prepared device has quite good performance on dark current and signal on/off ratio, suggesting promising application in optical fiber communication.
本文采用MOCVD技术研究了p-Ge/GaAs异质外延,制备了以1.3,1.55 $mu$m光探测为目标的p-Ge/i-GaAs/n-GaAs光探测器结构。光响应光谱结果表明,该器件具有良好的暗电流性能和信号开/关比,在光纤通信中具有广阔的应用前景。
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引用次数: 0
Impact of Spreading Factor on LoRaWAN Propagation in a Metropolitan Environment 城域环境下扩展因子对LoRaWAN传播的影响
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205422
Salaheddin Hosseinzadeh, N. Ramzan, M. Yousefi, K. Curtis, H. Larijani
A practical investigation of LoRaWAN’s (longrange wide area network) propagation in an urban and semiurban environment is demonstrated and analyzed in this article. Measured data is analyzed to understand the attributes of LoRa, including: effective propagation range, chirp spread spectrum (CSS) modulation and spreading factor (SF). This analysis provides a better understanding of these attributes. In addition, a comparison was made with propagation models to benchmark and observe the impact of clutter, environment and structures in practice. For this purpose, log-distance, COST.W.I models were used. An average increase of 5.5 dB was observed on the received signal strength due to a higher spreading factor. This translated into a range extension of approximately 500 m in practice. Outcome of this study provides an insight of LoRa’s propagation in metropolitan environments, and facilitates the network planning in similar scenarios.
本文对LoRaWAN(远程广域网)在城市和半城市环境下的传播进行了实际研究和分析。对实测数据进行分析,了解LoRa的属性,包括:有效传播范围、啁啾扩频(CSS)调制和扩频因子(SF)。这种分析可以更好地理解这些属性。此外,还与传播模型进行了比较,对实际中杂波、环境和结构的影响进行了基准测试和观察。为此,使用了对数距离、COST.W.I模型。由于扩频系数的提高,接收信号强度平均增加5.5 dB。这在实际中转化为大约500米的范围扩展。本研究的结果为LoRa在城域环境中的传播提供了深入的见解,并为类似场景下的网络规划提供了参考。
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引用次数: 2
Human activity classification with radar signal processing and machine learning 人类活动分类与雷达信号处理和机器学习
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205461
Mu Jia, Shaoxuan Li, J. Kernec, Shufan Yang, F. Fioranelli, O. Romain
As the number of older adults increases worldwide, new paradigms for indoor activity monitoring are required to keep people living at home independently longer. Radar-based human activity recognition has been identified as a sensing modality of choice because it is privacy-preserving and does not require end-users compliance or manipulation. In this paper, we explore the robustness of machine learning algorithms for human activity recognition using six different activities from the University of Glasgow dataset recorded with an FMCW radar. The raw radar data is pre-processed and represented using four different domains, namely, range-time, range-Doppler amplitude and phase diagrams, and Cadence Velocity Diagram. From those, salient features can be extracted and classified using Support Vector Machine, Stacked AutoEncoder, and Convolutional Neural Networks. The fusion of handcrafted features and features from CNN is applied to get the best scheme of classification with over 96% accuracy.
随着世界范围内老年人数量的增加,需要新的室内活动监测模式,以使人们在家中独立生活更长时间。基于雷达的人类活动识别已经被确定为一种选择的感知方式,因为它是隐私保护的,不需要最终用户遵守或操纵。在本文中,我们使用FMCW雷达记录的格拉斯哥大学数据集中的六种不同活动来探索机器学习算法对人类活动识别的鲁棒性。原始雷达数据经过预处理,并使用四个不同的域表示,即距离-时间、距离-多普勒振幅和相位图以及节奏速度图。从这些特征中,可以使用支持向量机、堆叠自动编码器和卷积神经网络提取和分类显著特征。将手工特征与CNN特征融合,得到准确率超过96%的最佳分类方案。
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引用次数: 13
Magnetization Dynamics Features in the SFS φ0 Josephson Junction SFS φ0 Josephson结的磁化动力学特性
Pub Date : 2020-08-01 DOI: 10.1109/UCET51115.2020.9205473
Y. Shukrinov, I. Rahmonov, A. E. Botha, A. Plecenik, Dragos Angel
We investigate the $varphi$0 Josephson junction, which demonstrates a rich variety of dynamical states determined by the parameters of the Josephson junction and intermediate ferromagnetic layer, as well as by the value of the dc-bias current. Results of magnetization dynamics simulation at fixed value of bias current and results of FFT analysis are presented. We discuss how the superconducting current interacts with the different magnetization components.
我们研究了$varphi$0 Josephson结,它显示了由Josephson结和中间铁磁层的参数以及直流偏置电流的值决定的丰富多样的动态状态。给出了固定偏置电流下的磁化动力学仿真结果和FFT分析结果。我们讨论了超导电流如何与不同的磁化分量相互作用。
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引用次数: 1
期刊
2020 International Conference on UK-China Emerging Technologies (UCET)
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