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2021 International Conference on Signal Processing and Machine Learning (CONF-SPML)最新文献

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A Two-stage Adaptive Weight-adjusting Interference Cancellation Demodulation Technology Based on SLIC and CWIC for NOMA 基于SLIC和CWIC的两级自适应加权干扰对消解调技术
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00013
Ruo-Nan Du
Gbps business will become an important part of the future mobile communications systems. It has been shown that non-orthogonal multiple access (NOMA) based on power multiplexing could potentially offer a robust performance in the spectrum utilization efficiency. However, when the terminal performs demodulation, the difference in user power superposition and the non-uniformity of user distribution may lead to some severe problems such as intensive excessive power or insufficient signal-to-noise ratio (SNR) under different scenarios, the performance of the communication system is reduced. Therefore, in this paper, a two-stage adaptive weight-adjusting interference cancellation (AWIC) demodulation technology based on symbol level based interference cancellation (SLIC) and code word level interference cancellation (CWIC) has been developed and presented. Moreover, we analyzed the downlink transmission performance of NOMA, innovated the multi-stage adaptive weight-adjusting serial interference cancellation (SIC) demodulation technology, and adjusted the depth of the demodulation algorithm according to the posterior decoding performance feedback. It improves NOMA demodulation performance under a low SNR environment and reduced the complexity under a high SNR environment. According to the computer simulations, under the average bit error rate (BER) of $3times 10^{-2}$, the improved NOMA interference cancellation approach proposed in this paper has a 5.09 dB performance improvement compared to SLIC and 9.8 dB compared to CWIC.
Gbps业务将成为未来移动通信系统的重要组成部分。研究表明,基于功率复用的非正交多址(NOMA)在频谱利用效率方面具有潜在的鲁棒性。然而,在终端进行解调时,由于用户功率叠加的差异和用户分布的不均匀性,在不同场景下可能会导致严重的功率过大或信噪比不足等问题,从而降低通信系统的性能。为此,本文提出了一种基于符号级干扰抵消(SLIC)和码字级干扰抵消(CWIC)的两级自适应调权干扰抵消(AWIC)解调技术。分析了NOMA的下行传输性能,创新了多级自适应加权串行干扰抵消(SIC)解调技术,并根据后向解码性能反馈调整了解调算法的深度。提高了低信噪比环境下的NOMA解调性能,降低了高信噪比环境下的解调复杂度。计算机仿真结果表明,在平均误码率(BER)为$3 × 10^{-2}$的情况下,本文提出的改进的NOMA干扰消除方法的性能比SLIC提高5.09 dB,比CWIC提高9.8 dB。
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引用次数: 0
Transmission Channel modeling and analysis of Intelligent Reflecting Surface 智能反射面传输通道建模与分析
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00045
Guoyuan Li
Wireless communication has developed rapidly in recent years. The fifth-generation(5G) era has arrived in an all-round way, and 5G technology has achieved a wide range of applications and brought great convenience to our life. With the all-round development of 5G technology, we begin to look forward to the future sixth-generation(6G) technology. In many conferences and reports, we have put the 6G technology research on the agenda. As an effective way to control the wireless environment channel manually, Intelligent Reflecting Surface(IRS)1 has become one of the 6G developable technologies and is getting more and more attention. IRS assisted wireless channel and the change of channel model are important research contents in the future wireless communication. Channel model is divided into large-scale model and small-scale model, among which the research of large-scale model is the most important one in the future technical research. The model of IRS Assisted Wireless Channel is still relatively basic in the current research, so this paper aims to further explore and research. In this paper, based on the model of path loss in free space, we analyze the path model of IRS assisted wireless communication transmission. We divide the path loss model into two scenarios: near field and far field. At the end of the article, we use matlab to simulate the theoretical model numerically, and plot the change of path loss results with different distances. We find that the simulation results are basically consistent with the theoretical model.
无线通信近年来发展迅速。第五代(5G)时代已经全面到来,5G技术实现了广泛的应用,给我们的生活带来了极大的便利。随着5G技术的全面发展,我们开始期待未来的第六代(6G)技术。在很多会议和报告中,我们都把6G技术的研究提上了议程。智能反射面(IRS)作为一种人工控制无线环境信道的有效方法,已成为6G可发展技术之一,受到越来越多的关注。IRS辅助无线信道和信道模型的转换是未来无线通信的重要研究内容。渠道模型分为大比例尺模型和小比例尺模型,其中大比例尺模型的研究是未来技术研究的重点。IRS辅助无线信道的模型在目前的研究中还比较基础,因此本文旨在进一步的探索和研究。本文在自由空间路径损耗模型的基础上,分析了IRS辅助无线通信传输的路径模型。我们将路径损耗模型分为近场和远场两种场景。在文章的最后,我们用matlab对理论模型进行了数值模拟,并绘制了路径损失结果随不同距离的变化。仿真结果与理论模型基本一致。
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引用次数: 0
Airbnb Pricing Based on Statistical Machine Learning Models 基于统计机器学习模型的Airbnb定价
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00042
Yinyihong Liu
Being one of the largest online accommodation booking platforms, Airbnb has many hosts who are seeking for more proper prices to increase their booking rate. To develop a good pricing prediction model, this paper has employed machine learning models including KNN, MLR, LASSO regression, Ridge regression, Random Forest, Gradient Boosting and XGBoost etc. While past studies on Airbnb pricing have applied quantitative pricing, some face the problems that the models are not robust enough and some face the problem of not training the model plentily. To fill this gap, we give careful consideration in exploratory data analysis to make the dataset more reasonable, apply many robust models ranging from regularized regression to ensemble models and use cross validation and random search to tune each parameter in each model. In this way, we not only select XGBoost as the best model for price prediction with R2 score 0.6321, but also uncover the features which have statistical significance with the target price.
作为最大的在线住宿预订平台之一,Airbnb有很多房东都在寻找更合适的价格来提高他们的预订率。为了建立一个好的定价预测模型,本文采用了KNN、MLR、LASSO回归、Ridge回归、Random Forest、Gradient Boosting和XGBoost等机器学习模型。过去对Airbnb定价的研究虽然采用了定量定价,但有的面临模型鲁棒性不够强的问题,有的面临模型训练不够充分的问题。为了填补这一空白,我们在探索性数据分析中仔细考虑使数据集更加合理,应用了许多鲁棒模型,从正则化回归到集成模型,并使用交叉验证和随机搜索来调整每个模型中的每个参数。这样,我们不仅选择了R2得分为0.6321的XGBoost作为价格预测的最佳模型,而且还发现了与目标价格具有统计学意义的特征。
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引用次数: 1
Performance Review of Generative Adversarial Network for a Bi-directional Task 双向任务生成对抗网络的性能评价
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00017
Chao Wu
Generative Adversarial Networks (GAN) contributed many significant works in computer vision tasks in different research areas. But, to author’s knowledge, there is no research discussion about GAN’s performance in a bi-directional task. In this paper, we utilize Pix2pix network as a GAN example to test its performance in a bi-directional task, which is to transfer daylight image to night image and transfer night image back to daylight image. The experimental results review both success cases and fail cases to get several interesting observations regarding the influence of human’s perception in evaluation.
生成对抗网络(GAN)在不同研究领域的计算机视觉任务中做出了许多重要的贡献。但是,据笔者所知,目前还没有关于GAN在双向任务中的性能的研究讨论。在本文中,我们以Pix2pix网络为例,测试了其在双向任务中的性能,即将白天图像转换为夜间图像,然后将夜间图像转换为白天图像。实验结果回顾了成功案例和失败案例,对人的感知在评价中的影响进行了一些有趣的观察。
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引用次数: 0
Estimate the Housing Price Under the Impact Of COVID-19 and Possible Migration Due to the Demand for Density 估算新冠疫情影响下的房价以及因密度需求而可能出现的人口迁移
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00033
Qingyuan Jiang
Different population among the states shows a heterogeneous housing price trend during the past years. Any possible abnormal migration will cause price change. Thus, the migration could be tackled by comparing the current price trend with the data in past 10 years. COVID-19 is a strong effect which could cause migration. In order to observe the possible migration under this situation, wo high-population states were chosen as examples – California and New York, to compare with two low-population states – Nevada and Ohio. Three machine learning techniques have been used (Random Forest, XGboost, and Ridge and Lasso regression) to forecast housing price in U.S.: the difference between the real price and forecast price trend will show the amount of real estate transactions affect by the pandemic. The observed data was compared with the predicted results after COVID-19. The final result didn’t show a strong evidence that would verify a possible migration, but the answer will be clearer with further studies.
在过去的几年里,不同的人口在各州之间表现出不同的房价趋势。任何可能的异常迁移都会引起价格变动。因此,可以通过比较当前的价格趋势与过去10年的数据来解决人口迁移问题。COVID-19是一种可能导致移民的强烈影响。为了观察在这种情况下可能发生的移民,我们选择了两个人口高的州——加利福尼亚和纽约作为例子,与两个人口低的州——内华达州和俄亥俄州进行比较。利用随机森林(Random Forest)、XGboost、Ridge and Lasso回归等3种机器学习技术预测了美国的房价,通过实际价格和预测价格趋势之间的差异,可以显示受疫情影响的房地产交易量。将观察数据与COVID-19后的预测结果进行比较。最终的结果并没有显示出强有力的证据来证实可能的迁移,但随着进一步的研究,答案将更加清晰。
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引用次数: 0
Stabilization with the Idea of Notch Filter in Automatic Control System 陷波滤波思想在自动控制系统中的镇定
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00025
Jailin Chen
Stabilization is one of the most significant step of automatic control system design. In this paper, we propose a stabilization method for linear time-invariant SISO systems from the view of signal processing. In this method, the complex plane is regarded as a frequency plane, and the control law to improve the stability of the system is designed with the idea of filtering, which has the advantages of intuitive design and easy adjustment. The feasibility of this method is proved by simulation, and the relationship between the design of control law and the dynamic characteristics of the system is analyzed.
稳定是自动控制系统设计中最重要的步骤之一。本文从信号处理的角度出发,提出了线性时不变SISO系统的一种镇定方法。该方法将复平面视为频率平面,采用滤波思想设计控制律以提高系统的稳定性,具有设计直观、调整方便等优点。通过仿真验证了该方法的可行性,并分析了控制律设计与系统动态特性之间的关系。
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引用次数: 0
Transfer Learning on Interstitial Lung Disease Classification 间质性肺疾病分类的迁移学习
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00046
Zhi Yi, Yuyang Wang
For the treatment of Interstitial Lung Disease, it is crucial to have an early diagnosis. However, doctors still have a lot of controversy in the diagnosis of lung nodules even with today’s highly developed medical imaging technology. In this article, we summarized the five major challenges we face in medical image recognition and systematically listed the applications from traditional image recognition technology to deep learning in lung CT image recognition. Compared to the traditional convolutional neural network built and trained from scratch, it is beneficial to apply transfer learning to the recognition of lung nodules. Transfer learning focus on transferring knowledge from previous well-trained task to target learning task. Transferring means pretrained networks utilize fine-tuning to reduce iteration times of weight so that it can cope with the problem of lack of high quality images. Various experiments demonstrate that transfer learning performances better than traditional convolutional neural network under complicated circumstances of image recognition such as medical images. In this article, transfer learning is classified into 3 types: inductive transfer learning, transductive transfer learning and unsupervised transfer learning. The main difference between them is label quantity of target training set. Inductive transfer learning highly depends on feature engineering. Compared to it, training sets of two remaining has few labels. However, transductive transfer learning and unsupervised transfer learning are unstable while facing sophisticated cases.
对于间质性肺疾病的治疗,早期诊断是至关重要的。然而,即使在医学影像技术高度发达的今天,医生对肺结节的诊断仍然存在很多争议。本文总结了医学图像识别面临的五大挑战,系统列举了从传统图像识别技术到深度学习在肺部CT图像识别中的应用。与传统的从头构建和训练的卷积神经网络相比,将迁移学习应用于肺结节的识别是有益的。迁移学习的重点是将知识从先前训练良好的任务转移到目标学习任务。传递是指预训练的网络利用微调来减少权值的迭代次数,从而可以解决缺乏高质量图像的问题。各种实验表明,在医学图像等复杂的图像识别环境下,迁移学习的性能优于传统卷积神经网络。本文将迁移学习分为三种类型:归纳迁移学习、传导迁移学习和无监督迁移学习。它们之间的主要区别在于目标训练集的标签数量。归纳迁移学习高度依赖于特征工程。与之相比,剩下的两个训练集的标签较少。然而,在复杂的情况下,转换迁移学习和无监督迁移学习是不稳定的。
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引用次数: 4
Review on LiDAR-based SLAM Techniques 基于激光雷达的SLAM技术综述
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00040
Leyao Huang
LiDAR-based Simultaneous Localization and Mapping (LiDAR-SLAM) uses the LiDAR sensor to localize itself by observing environmental features and incrementally build the map of the surrounding environment. In this way, the purpose of simultaneous localization and mapping in the unknown environment can be achieved. Localization and mapping with high robustness, high accuracy, and high practicability is a complex and hot issue in recent years. This paper will briefly introduce the information background, classification and development history of LiDAR-SLAM. We will also summarize the common frameworks of LiDAR-SLAM and the function of core modules in the existing LiDAR-SLAM. Additionally, the state-of-the-art multi-sensor fusion-based LiDAR-SLAM techniques are investigated, and the future development trend of LiDAR-SLAM is discussed.
基于激光雷达的同步定位和测绘(LiDAR- slam)利用激光雷达传感器通过观察环境特征来定位自身,并逐步构建周围环境的地图。这样就可以达到在未知环境中同时定位和映射的目的。高鲁棒性、高精度、高实用性的定位与制图是近年来一个复杂而又热门的问题。本文将简要介绍激光雷达slam的信息背景、分类和发展历史。我们还将总结LiDAR-SLAM的常见框架以及现有LiDAR-SLAM中核心模块的功能。此外,对基于多传感器融合的激光雷达slam技术进行了研究,并对激光雷达slam的未来发展趋势进行了讨论。
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引用次数: 17
Advances in the Deep Brain Stimulation for Parkinson’s Disease 脑深部电刺激治疗帕金森病的研究进展
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00018
Ping Xia
Parkinson’s disease (PD) is a neurodegenerative disease. The subject of PD patients are between 60 and 90 years old, and human patients suffer from PD before the age of 50 are particularly small. Deep brain stimulation (DBS) is one of the most efficient method to treat PD. It is found that there are some problems in the current clinical use of DBS (which is always called conventional deep brain stimulation (cDBS), such as the adjustment of parameters requires doctors to adjust parameters by experience. In the improvement process of DBS, adaptive deep brain stimulation (aDBS) has been widely studied because of its ability to better adjust the parameters. The cDBS is an open-loop system, and aDBS is a closed-loop system which the parameters can be better matched. Artificial intelligence deep brain stimulation (AIDBS) is not only an intelligent device, which can adjust the parameters quickly and accurately, furthermore it can be used to find the biomarkers of PD in future studies.
帕金森病(PD)是一种神经退行性疾病。PD患者的研究对象多在60 ~ 90岁之间,50岁以前患PD的人类患者尤其少。深部脑刺激(DBS)是治疗帕金森病最有效的方法之一。发现目前DBS(常被称为常规深部脑刺激)在临床应用中存在一些问题,如参数的调整需要医生凭经验调整参数。在DBS的改进过程中,适应性深部脑刺激(adaptive deep brain stimulation, aDBS)因其具有较好的参数调节能力而得到了广泛的研究。cDBS为开环系统,aDBS为闭环系统,参数匹配性较好。人工智能脑深部刺激(AIDBS)不仅是一种可以快速准确调节参数的智能设备,而且在未来的研究中可以用于寻找PD的生物标志物。
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引用次数: 2
Research on Battery Monitoring Technology Based on Internet of Things 基于物联网的电池监测技术研究
Pub Date : 2021-11-01 DOI: 10.1109/CONF-SPML54095.2021.00037
Yiran Hu
This paper studies the battery monitoring technology based on the Internet of Things, which is applied to monitor the operation and performance of the battery in the smart grid. Through the research on the development background and research status of the battery monitoring industry, based on the structure of the Internet of Things and battery monitoring, the construction method of the battery monitoring system composed of data acquisition system, communication system and monitoring platform is proposed.
本文研究了基于物联网的电池监测技术,将其应用于智能电网中电池的运行和性能监测。通过对电池监测行业发展背景和研究现状的研究,基于物联网和电池监测的结构,提出了由数据采集系统、通信系统和监测平台组成的电池监测系统的构建方法。
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引用次数: 0
期刊
2021 International Conference on Signal Processing and Machine Learning (CONF-SPML)
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