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2021 2nd International Symposium on Computer Engineering and Intelligent Communications (ISCEIC)最新文献

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Reconstructions of Analytic Signals via Alternating Direction Method of Multipliers 用乘法器交替方向法重构解析信号
Shuang Li
In this paper, we introduce a sparse reconstruction strategy for analytic signals in Hardy space ${H^2}left( mathbb{D} right)$ where $mathbb{D}$ denotes the unit disk of the complex plane. The representation strategy is based on the optimization technique which is called Alternating Direction Method of Multipliers (ADMM). The dictionary matrix and discrete signals are investigated. The author also gives two numerical examples to illustrate the idea.
本文介绍了Hardy空间${H^2}左(mathbb{D} 右)$中解析信号的稀疏重构策略,其中$mathbb{D}$表示复平面的单位圆盘。该表示策略基于乘法器交替方向法(ADMM)优化技术。研究了字典矩阵和离散信号。作者还给出了两个数值例子来说明这一思想。
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引用次数: 0
Recognition of Engineering Vehicles in Aerial Images of Multi Rotor UAV 多旋翼无人机航拍图像中的工程车辆识别
Haiyang Zheng, Yingchun Zhong, Wenxiang Zhang, Zhiyong Luo, Bo Wang
It is one of the significant tasks of power inspection by multi rotor Unmanned Aerial Vehicle (UAV) to recognize engineering vehicles in aerial images. If there are engineering vehicles working near or below the high-voltage power line, the UAV would give out the important early warning message to avoid the situation that the bucket or boom of the engineering vehicle enters the safe distance from the high-voltage power line, and reduce accidents such as short circuit breakdown. Aiming at the problem of recognition of engineering vehicles in aerial images of UAV inspection, this paper proposed an improved capsule network method. First, the structure of original capsule network is replaced with a multi-layer densely connected capsule network. Next, the dynamic routing algorithm of the capsule network is improved. As the results of experiments have shown, (1) the improved capsule network method gets a mAP of 93.74% for the recognition of engineering vehicles, and its parameter scale is smaller than other methods. (2) The number of network layers influences the recognition precision greatly. Their relationship is non-monotonic and nonlinear. In addition, whether or not to improve the dynamic routing algorithm does not affect the trends of recognition mAP. The overall performance of the improved capsule network method is obviously better than YOLOv5 and other artificial feature extraction methods.
在航拍图像中识别工程车辆是多旋翼无人机动力检测的重要任务之一。当高压电力线附近或下方有工程车作业时,无人机会发出重要预警信息,避免工程车铲斗或吊杆进入高压电力线安全距离,减少短路击穿等事故。针对无人机巡检航拍图像中工程车辆的识别问题,提出了一种改进的胶囊网络方法。首先,将原有的胶囊网络结构替换为多层密连的胶囊网络。其次,对胶囊网络的动态路由算法进行了改进。实验结果表明:(1)改进的胶囊网络方法对工程车辆识别的mAP值为93.74%,且参数尺度小于其他方法。(2)网络层数对识别精度影响很大。它们的关系是非单调的和非线性的。此外,是否改进动态路由算法并不影响识别mAP的趋势。改进的胶囊网络方法整体性能明显优于YOLOv5等人工特征提取方法。
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引用次数: 1
Distributed Storage of Meteorological Grid Data based on HBase 基于HBase的气象网格数据分布式存储
Honghao Yu, Hong Jia
In order to improve the storage and management ability of relational database for massive meteorological grid data, an index method based on spatial subdivision grid is proposed, and a distributed storage model of meteorological grid data based on HBase is designed and implemented. In this paper, the spatial grid is established on the NetCDF format meteorological grid data, and the spatial index coding based on spatial octree is designed; The distributed storage scheme based on HBase is adopted and the structure of rowkey and table is optimized . The experimental results show that HBase database is superior to relational database in storage and query for massive meteorological grid data.
为了提高关系数据库对海量气象网格数据的存储和管理能力,提出了一种基于空间细分网格的索引方法,设计并实现了基于HBase的气象网格数据分布式存储模型。本文在NetCDF格式气象网格数据基础上建立空间网格,设计了基于空间八叉树的空间索引编码;采用基于HBase的分布式存储方案,优化了rowkey和table的结构。实验结果表明,HBase数据库在海量气象网格数据的存储和查询方面优于关系型数据库。
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引用次数: 0
Global optimization image completion processing based on generative countermeasure network 基于生成对抗网络的全局优化图像补全处理
Xin Zhen, Jinhua Li
In order to improve image clarity and ensure image processing effects, a global optimization image completion method based on generative confrontation network is proposed. The defect area of the image is collected and detected, and the feature changes of the globally optimized image are analyzed, thereby effectively de-noising the image information and effectively improving the image quality. Finally, experiments show that the global optimization image completion processing method based on the generative confrontation network can better improve the image definition and has high practicability.
为了提高图像清晰度,保证图像处理效果,提出了一种基于生成对抗网络的全局优化图像补全方法。对图像的缺陷区域进行采集和检测,分析全局优化后图像的特征变化,从而有效地去噪图像信息,有效地提高图像质量。最后,实验表明,基于生成对抗网络的全局优化图像补全处理方法能较好地提高图像清晰度,具有较高的实用性。
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引用次数: 0
Workflow task scheduling optimization strategy in moving edge computing environment 移动边缘计算环境下工作流任务调度优化策略
Haiyan Lv, Zhihong Zhang
With the explosive growth of mobile devices, the computing power and resource storage of the mobile terminal have higher demand, and the workflow task scheduling in the moving edge computing environment can solve complex data dependencies between tasks in workflows. The proposal of moving edge computing techniques is to solve computing resources caused by massive mobile device access, which can meet the low delay and high computing power of the mobile device. This paper proposes a workflow task scheduling optimization algorithm (WTS-OSM) in moving edge computing environment. First, the workflow tasks are generated into directed acyclic graph (DAG), and then the tasks in DAG are layered. The tasks in the same layer do not have dependencies, but the tasks in two adjacent layers do. Finally, an optimized genetic algorithm (GA) is used to determine whether the layer task computes unloading. Experimental results show that the proposed algorithm is superior to the traditional algorithms in terms of the task execution time.
随着移动设备的爆炸式增长,对移动终端的计算能力和资源存储提出了更高的要求,移动边缘计算环境下的工作流任务调度可以解决工作流中任务之间复杂的数据依赖关系。移动边缘计算技术的提出是为了解决海量移动设备接入带来的计算资源问题,能够满足移动设备低时延、高计算能力的要求。提出了一种移动边缘计算环境下的工作流任务调度优化算法。首先将工作流任务生成有向无环图(DAG),然后对DAG中的任务进行分层。同一层中的任务没有依赖关系,但相邻两个层中的任务有依赖关系。最后,采用一种优化的遗传算法(GA)来确定层任务是否计算卸载。实验结果表明,该算法在任务执行时间上优于传统算法。
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引用次数: 1
Influence on distributed airport site selection from ground-effect wind field of UAV 无人机地效风场对分布式机场选址的影响
Wenxiang Zhang, Yingchun Zhong, Zongyang Wang, Zhiyong Luo, Bo Wang
It is one of the key steps of unmanned aerial vehicles (UAVs) autonomously cruising to touch down the distributed airport automatically and accurately. The ground-effect wind field is one of the main factors to influence the touching down precision of UAV. In order to explore how much the ground-effect wind field influence the touching down precision, this paper chooses a quadrotor UAV with 400mm diameter as the research object, establishes the model of UAV and the ground-effect wind field, analyzes the touching down results while the distributed airport is at the opening and flat scene, the scene with single-sided vertical obstacle and the scene with bi-symmetrical vertical obstacles respectively. The experimental results show that: (1) there is little affection on the accuracy of touching down when the distributed airport is at the opening and flat scene. (2) The ground-effect wind field has great affection on the accuracy of touching down when the distributed airport is at the scene with single-sided vertical obstacle. If the distance between the UAV and the single-sided vertical obstacle is less than 1 meter, the UAV is very easy to overturn. (3) When the distributed airport is at the scene with bi-symmetrical vertical obstacles, the accuracy of touching down is decided by the height of the vertical obstacle. The investigation of this paper is very significant to select the location of distributed airport.
分布式机场的自动准确着陆是无人机自主巡航的关键步骤之一。地效应风场是影响无人机着陆精度的主要因素之一。为了探究地效应风场对着陆精度的影响程度,本文选择一架直径为400mm的四旋翼无人机作为研究对象,建立了无人机模型和地效应风场,分别分析了分布式机场在开口平坦场景、单面垂直障碍物场景和双对称垂直障碍物场景下的着陆效果。实验结果表明:(1)分布式机场在开放平坦场景下对着陆精度影响不大;(2)分布式机场在单面垂直障碍物现场时,地效应风场对着陆精度影响较大。如果无人机与单面垂直障碍物之间的距离小于1米,则无人机非常容易倾覆。(3)分布式机场处于双对称垂直障碍物场景时,着陆精度由垂直障碍物的高度决定。本文的研究对分布式机场选址具有重要的指导意义。
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引用次数: 0
An Improved Anchor-Free Detection Method for Traffic Sign Detection 一种改进的无锚检测交通标志检测方法
Tonghe Ding, Kaili Feng, Tianping Li, Zhifeng Liu
As a basic task in the intelligent driving system, the traffic sign detection can locate and classify the traffic signs in real time and accurately. In response to the own design limitation of anchor-based detection methods, an improved anchor-free detection method is proposed. The method adds feature reinforcement module and head reinforcement module. First, in order to solve the small sign detection problem, a feature reinforcement module based on the hybrid attention mechanism is proposed. Secondly, in order to reduce the interference of complex background information to distinguish the prospects from the background, a head reinforcement module is proposed. We perform sufficient experiments on the CCTSDB dataset, and the experimental results demonstrate the effectiveness and robustness of the proposed method.
交通标志检测是智能驾驶系统的一项基础任务,能够实时、准确地对交通标志进行定位和分类。针对基于锚的检测方法在设计上的局限性,提出了一种改进的无锚检测方法。本发明增加特征增强模块和头部增强模块。首先,针对小符号检测问题,提出了一种基于混合注意机制的特征增强模块。其次,为了减少复杂背景信息的干扰,区分前景和背景,提出了头部增强模块;我们在CCTSDB数据集上进行了充分的实验,实验结果证明了该方法的有效性和鲁棒性。
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引用次数: 0
A jamming identification method based on deep learning for networking radars 基于深度学习的网络雷达干扰识别方法
Xiaoyu Cong, Pandong Zhang, Yubing Han
Jamming identification is the premise of radar anti-jamming in the complex electromagnetic environment. The signals from monostatic radar are taken as the object of training and identification, which has the disadvantages of less information, single observation angle and easy to be attacked. In order to improve the identification accuracy, a jamming identification method based on deep learning for networking radars is proposed in this paper. The range-Doppler signals from multiple radars in the network are stitched into a data set for jamming identification, which contains more information than that from monostatic radar. The models of radar jammings are established, and a Convolutional Neural Network is designed to identify jammings, target signal and noise. The simulation results show that the accuracy of the proposed jamming identification method is 99.2%.
干扰识别是复杂电磁环境下雷达抗干扰的前提。单站雷达信号作为训练和识别的对象,存在信息少、观测角度单一、易被攻击等缺点。为了提高识别精度,本文提出了一种基于深度学习的联网雷达干扰识别方法。将网络中多台雷达的距离多普勒信号拼接成一个数据集进行干扰识别,该数据集比单台雷达的数据集包含更多的信息。建立了雷达干扰模型,设计了卷积神经网络来识别干扰、目标信号和噪声。仿真结果表明,所提出的干扰识别方法的准确率为99.2%。
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引用次数: 1
Design of multi-pulse waveforms using polyphase complementary phase-coding in MIMO radar MIMO雷达中基于多相互补相位编码的多脉冲波形设计
Qin Zhu, Jun Tang, Jinwang Yi, Qiuyue Yin
Multiple-Input Multiple-Output (MIMO) radar can efficiently improve radar performance by transmitting specific orthogonal waveforms. A novel multi-pulse waveforms design is proposed for MIMO radar in this paper. The polyphase complementary sequences are used as spatial codes and then combined with circulating linear frequency modulated (LFM) signals to enhance range resolution in this method. Both analyses and results show that the designed waveform has better performance than the conventional signals in suppressing sidelobes and range resolution.
多输入多输出(MIMO)雷达通过发射特定的正交波形来有效地提高雷达性能。提出了一种适用于MIMO雷达的多脉冲波形设计方法。该方法采用多相互补序列作为空间码,再与循环线性调频信号结合,以提高距离分辨率。分析和结果表明,所设计的波形在抑制副瓣和距离分辨率方面都优于常规信号。
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引用次数: 0
Regression prediction of material grinding particle size based on improved sparrow search algorithm to optimize BP neural network 基于改进麻雀搜索算法优化BP神经网络的物料研磨粒度回归预测
Shida Zhang, Jingyu Zhang, Zehua Wang, Quanhu Li
Aiming at the problem that the common material grinding factors in the industry are complex and it is difficult to accurately predict the output particle size, this paper introduces the sparrow search algorithm, and proposes two improved strategies for the sparrow search algorithm. For the original sparrow search algorithm, the global search ability is insufficient. And the problem that is easy to fall into the local optimum, the introduction of Tent chaotic map to initialize the population, enhance the global search ability. Meanwhile, introduce the Cauchy mutation strategy to solve the local optimum problem, effectively improve the algorithm search ability, and combine the BP neural network to grind the output particle size of the material make predictions. The simulation results show that the improved sparrow search algorithm optimizes the weights and biases of the BP neural network and improves the training accuracy of the BP neural network. The experimental results show that the proposed TCSSA-BP model has obvious effects on the regression prediction of the output particle size of the material grinding.
针对行业中常见物料研磨因素复杂、难以准确预测输出粒度的问题,介绍了麻雀搜索算法,并对麻雀搜索算法提出了两种改进策略。对于原有的麻雀搜索算法,全局搜索能力不足。针对易陷入局部最优的问题,引入Tent混沌映射对种群进行初始化,增强全局搜索能力。同时,引入柯西突变策略解决局部最优问题,有效提高了算法的搜索能力,并结合BP神经网络对物料的研磨输出粒度进行预测。仿真结果表明,改进的麻雀搜索算法优化了BP神经网络的权值和偏置,提高了BP神经网络的训练精度。实验结果表明,提出的TCSSA-BP模型对物料磨矿输出粒度的回归预测效果明显。
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引用次数: 6
期刊
2021 2nd International Symposium on Computer Engineering and Intelligent Communications (ISCEIC)
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