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2020 IEEE 6th International Conference on Computer and Communications (ICCC)最新文献

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Visualization of Traffic Data: A Survey of Methods and Datasets 交通数据的可视化:方法和数据集的调查
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345004
Feng Qian
With the rapid development of cities, massive and complex traffic data is being generated and collected. The traffic data is not intuitive and cannot highlight key information about urban traffic conditions. However, traffic data visualization can directly correlate users with the data, and support users to interact with data in a convenient and visual way. Then realize the feedback of blending user wisdom and machine intelligence. This paper investigates a structured survey of the state of the art in the visualization of traffic data. First, we reviewed five representative traffic data visualization methods including WebVRGIS based traffic analysis and visualization system, TripMiner, IoV distributed architecture, SMASH architecture, and LDA-based topic modelling. Meanwhile, we analyzed the traffic datasets that applied in each method. Then we summarize these methods from seven aspects: scalability, data storage, data update, interactivity, reliability, data anomaly detection, and spatiotemporal visualization. In addition, we make a detailed comparative analysis of the key capabilities of five representative traffic data visualization methods in processing traffic big data. Finally, we conclude that the SMASH architecture performs better in processing high speed and large flow traffic data. Moreover, we propose a novel direction for optimizing traffic data visualization techniques.
随着城市的快速发展,产生和收集了大量复杂的交通数据。交通数据不直观,不能突出城市交通状况的关键信息。而交通数据可视化可以直接将用户与数据关联起来,支持用户以方便、直观的方式与数据进行交互。从而实现用户智慧与机器智能的融合反馈。本文对交通数据可视化技术的现状进行了结构化的研究。首先,综述了基于WebVRGIS的交通分析与可视化系统、TripMiner、车联网分布式架构、SMASH架构和基于lda的主题建模等5种代表性的交通数据可视化方法。同时,对各方法应用的交通数据集进行了分析。然后从可扩展性、数据存储、数据更新、交互性、可靠性、数据异常检测和时空可视化七个方面对这些方法进行了总结。此外,我们还对五种具有代表性的交通数据可视化方法在处理交通大数据方面的关键能力进行了详细的对比分析。最后,我们得出了SMASH架构在处理高速大流量交通数据方面表现更好的结论。此外,我们还提出了优化交通数据可视化技术的新方向。
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引用次数: 0
Uncertainty Quantification in Medical Image Segmentation 医学图像分割中的不确定度量化
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345043
Haixing Li, Haibo Luo
In medical images, the observer's manual description of different structures is very different, and it spans a wide range of various structures and pathologies. This variability (which is a characteristic of biological issues, imaging modality and expert annotators) has not been fully considered in the design of computer algorithms for medical image quantification. So far, few people predict the uncertainty of medical image segmentation. In this paper, we designed a V-shaped network to quantify the uncertainty in prostate MRI image segmentation. We have embedded a feature pyramid attention module in the backbone network, which can extract high-level semantic context information at different scales and provide a pixel-level attention to the decoder. At the same time, the module will not bring a large computational burden. In our experiments, we tested the performance of the proposed method on 55 clinical subjects.
在医学图像中,观察者对不同结构的手工描述是非常不同的,它跨越了广泛的各种结构和病理。这种可变性(这是生物学问题、成像方式和专家注释者的特征)在医学图像量化的计算机算法设计中没有得到充分考虑。到目前为止,很少有人预测医学图像分割的不确定性。在本文中,我们设计了一个v形网络来量化前列腺MRI图像分割中的不确定性。我们在骨干网络中嵌入了一个特征金字塔关注模块,该模块可以在不同尺度上提取高级语义上下文信息,并为解码器提供像素级关注。同时,该模块不会带来较大的计算负担。在我们的实验中,我们在55个临床受试者上测试了所提出方法的性能。
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引用次数: 3
Recognition of Communication Relationship Based on the Spectrum Monitoring Data by Improved VGGNET 基于改进VGGNET的频谱监测数据通信关系识别
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345119
Haibo Zhang, Changhua Yao, Lei Zhu, Lei Wang, Fanpeng Zhu, Yiming Chen
The communication relationship can reflect the hidden information of the communication network, which is of great significance for discovering important nodes in the network. To overcome the difficulty of manually extracting expert features, this paper uses deep learning methods to study the communication relationship recognition. First, use the deep learning model to classify the spectrum data directly, and model the communication relationship as a classification problem with time feature data for processing. It is found that the neural network model is easy to fall into a local minimum; in order to limit the impact of the local minimum problem on recognition In this paper, combining the rules of frequency hopping communication to process the data, make the neural network take as few tasks as possible, and then propose the second design scheme, the communication time series classification scheme, and the final recognition rate reaches 97% on the test set. This article uses long and short memory networks and convolutional neural networks to conduct experiments. Among them, the improved VGG network structure has the best recognition rate in communication problems. The factors that affect the recognition rate of neural networks in the identification of communication relationships are discussed in depth, and suggestions on how to adjust these factors are given based on theory and experiment.
通信关系可以反映通信网络的隐藏信息,对于发现网络中的重要节点具有重要意义。为了克服人工提取专家特征的困难,本文采用深度学习方法对通信关系识别进行研究。首先,利用深度学习模型直接对频谱数据进行分类,并将通信关系建模为带有时间特征数据的分类问题进行处理。研究发现,神经网络模型容易陷入局部极小值;为了限制局部极小问题对识别的影响,本文结合跳频通信规则对数据进行处理,使神经网络承担的任务尽可能少,然后提出第二种设计方案,即通信时间序列分类方案,最终在测试集上的识别率达到97%。本文采用长、短时记忆网络和卷积神经网络进行实验。其中,改进的VGG网络结构在通信问题中具有最好的识别率。对通信关系识别中影响神经网络识别率的因素进行了深入探讨,并从理论和实验两方面提出了调整这些因素的建议。
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引用次数: 0
A Cross-source Scheduling Method for Heterogeneous Data in Cloud Environment 云环境下异构数据的跨源调度方法
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345191
Sheng-hui Zhao, Wenjiang Wu
To address the time-consuming problem of scheduling the transmission of heterogeneous data across sources in cloud computing, many existing scheduling methods are implemented by heuristic algorithms, which usually cause load imbalance and low throughput and acceleration. Therefore, this paper proposes a cross-source scheduling method for heterogeneous data in a cloud environment, which carries out data prefetching before the actual scheduling, greatly reducing the computation amount during scheduling and thus the scheduling resource overhead. Then, all variables are updated, the quality of the heterogeneous data cross-source sub-stream to be scheduled is arranged, and it is regarded as the weight of the sub-stream data, the best quality sub-stream data among the heterogeneous multi-source sub-stream data is selected in the scheduling window each time for scheduling transmission, and the processing of all data sub-streams on paper is finished. The experimental results show that the method proposed in this paper is capable of cross-source scheduling of heterogeneous data in a cloud environment with high load balancing, throughput and acceleration ratios.
为了解决云计算中异构数据跨数据源传输调度的耗时问题,现有的调度方法大多采用启发式算法实现,通常会造成负载不平衡、吞吐量和加速低等问题。因此,本文提出了一种云环境下异构数据的跨源调度方法,在实际调度之前进行数据预取,大大减少了调度过程中的计算量,从而减少了调度资源的开销。然后对所有变量进行更新,对待调度异构数据跨源子流的质量进行排序,并将其作为子流数据的权重,每次在调度窗口中选择异构多源子流数据中质量最好的子流数据进行调度传输,完成纸面上所有数据子流的处理。实验结果表明,本文提出的方法能够实现云环境下异构数据的跨源调度,具有较高的负载均衡、吞吐量和加速比。
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引用次数: 0
Hybrid Beamforming for Multiuser Millimeter Wave MIMO-OFDM Systems 多用户毫米波MIMO-OFDM系统的混合波束形成
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345179
Xingyu Zhao, Tian Lin, Tongtong Hui, Yu Zhu
Hybrid analog and digital beamforming (HBF) for large-scale antenna arrays with limited radio frequency chains has been regarded as one of the promising candidates for future wireless communications. Due to the limitation of hardware, this problem becomes more challenging compared with the design of conventional digital beamforming schemes. In this paper, we investigate the HBF design for broadband multiuser millimeter wave multiple-input multiple-output systems. By utilizing the alternating minimization method and taking the weighted sum mean square error minimization criterion, a strictly convergent algorithm based on the manifold optimization method is proposed to efficiently tackle the non-convex problem. The algorithm is applicable to the analog beamforming design in both the fully-connected architecture and the partially-connected architecture. Simulation results demonstrate the fast convergence and excellent performance of the proposed scheme.
用于有限射频链的大规模天线阵列的模拟和数字混合波束形成(HBF)被认为是未来无线通信的一个有前途的候选方案。由于硬件的限制,与传统数字波束形成方案的设计相比,这一问题更具挑战性。本文研究了宽带多用户毫米波多输入多输出系统的HBF设计。利用交替最小化法和加权和均方误差最小化准则,提出了一种基于流形优化方法的严格收敛算法,有效地解决了非凸问题。该算法适用于全连接结构和部分连接结构下的模拟波束形成设计。仿真结果表明,该算法具有较快的收敛速度和良好的性能。
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引用次数: 1
A New Variable Step Size Algorithm Based Hybrid Active Noise Control System for Gaussian Noise with Impulsive Interference 基于变步长算法的脉冲高斯噪声混合有源控制系统
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9344981
Wenzhao Zhu, Lei Luo, Jinwei Sun, M. G. Christensen
Noise containing both strong narrowband and broadband components generated by rotating machine occur in many situations where active noise control is desirable. Such noise may be reduced by hybrid active noise control (HANC) methods, as shown in previous work. However, the performance of conventional HANC methods decrease when impulsive interference occurs. To improve the tracking and robustness of such HANC systems, a new hybrid noise control system with anti-pulse variable step size algorithm (APV-HANC) is proposed. By using new variable step size method and HANC structure, the APV-HANC method has better tracking and robustness performance of the whole system when impulsive noise occurs. Theoretical analysis and simulations confirms the superior performance of the proposed method.
在许多需要主动噪声控制的情况下,旋转机械产生的噪声既有强窄带噪声又有强宽带噪声。如前所述,这种噪声可以通过混合主动噪声控制(HANC)方法来降低。然而,当脉冲干扰出现时,传统的HANC方法的性能会下降。为了提高HANC系统的跟踪性和鲁棒性,提出了一种新的抗脉冲变步长混合噪声控制系统(APV-HANC)。通过采用新的变步长方法和HANC结构,APV-HANC方法在脉冲噪声出现时对整个系统具有更好的跟踪和鲁棒性。理论分析和仿真验证了该方法的优越性。
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引用次数: 2
On the convergence of optimizer-activation pairs 关于优化器-激活对的收敛性
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345160
Dachuan Zhao
The effect of training of deep neural network depends on the selection of the activation function and the optimizer, because the different activation functions lead to distinct loss curvature and the different optimizers will have different performance in distinct curvatures. In this paper, we select different combinations of activation functions and optimizers, seek to select the best combination under the same experiment setting, and take a general discussion for the efficiency of these combinations finally. Moreover, to guarantee fair comparison the hyperparameters tuning is conducted.
深层神经网络的训练效果取决于激活函数和优化器的选择,因为不同的激活函数会导致不同的损失曲率,不同的优化器在不同的曲率下会有不同的性能。本文选择了激活函数和优化器的不同组合,寻求在相同实验设置下的最佳组合,最后对这些组合的效率进行了一般性的讨论。此外,为了保证比较的公平性,还进行了超参数整定。
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引用次数: 0
A Ku-Band Self-Biased Bidirectional Amplifier in $0.25 mumathrm{m}$ PHEMT Technology 基于$0.25 mu mathm {m}$ PHEMT技术的ku波段自偏置双向放大器
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345098
Yuan Li, Shouxian Mou
A fully integrated Ku-band (14∼18GHz) self-biased bidirectional amplifier (BDA) is demonstrated in a $0.25mumathrm{m}$ GaAs pHEMT technology. The proposed bidirectional amplifier comprises a power amplifier (PA) and a low noise amplifier (LNA) for T/R modules of phased array with in/output switches. In transmitting mode, the BDA achieves a flat small signal gain of $24.2pm 0.8 text{dB}$, the measured saturated output power is 23.6 dBm with 28.3% peak power added efficiency (PAE) at 16 GHz. In receiving mode, the BDA achieves a flat gain of $13.1pm 0.7 text{dB}$. The measured minimum noise figure is 4.2 dB at 16 GHz and below 4.7 dB over the band. And its in/output P1 dB are 10.3 dBm and 22.8 dBm at 16 GHz, respectively. The size of the MMIC is $2.15 text{mm}times 1.55 text{mm}$. To the authors' knowledge, this is the first demonstration of Ku-band self-biased BDA, and it attains state-of-the-art peak PAE in Tx mode, and in/output P1dB in Rx mode.
采用0.25mu mathm {m}$ GaAs pHEMT技术,展示了一种完全集成的ku波段(14 ~ 18GHz)自偏置双向放大器(BDA)。该双向放大器包括一个功率放大器(PA)和一个低噪声放大器(LNA),用于具有输入/输出开关的相控阵的T/R模块。在发射模式下,BDA实现了24.2pm 0.8 text{dB}$的平坦小信号增益,在16 GHz时测量的饱和输出功率为23.6 dBm,峰值功率附加效率(PAE)为28.3%。在接收模式下,BDA实现了$13.1pm 0.7 text{dB}$的平坦增益。测量到的最小噪声系数在16 GHz时为4.2 dB,在整个频段内低于4.7 dB。其输入/输出P1 dB在16 GHz时分别为10.3 dBm和22.8 dBm。MMIC的大小为$2.15 text{mm}乘以$ 1.55 text{mm}$。据作者所知,这是ku波段自偏置BDA的首次演示,它在Tx模式下达到了最先进的峰值PAE,在Rx模式下达到了/输出P1dB。
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引用次数: 1
A Hybrid Mode of Sequence Prediction Based on Generative Adversarial Network 一种基于生成对抗网络的混合序列预测模式
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9344941
Han Liu, Heng Luo, Tingfei Zhang, Wenxuan Huang
Human beings nowadays spend more than 90% of the lifetime indoors, leading to the dramatic increase of energy consumption in various buildings. Therefore, research regarding the environment friendly building becomes much more popular recently in which the prediction of energy consumption is a promised method. Nevertheless, the accuracy of prediction is not sound due to insufficient samples. A novel data generation model, termed HMSP, based on the generative adversarial networks, is proposed in this paper to generate much more data robustly, depending on a small number of samples available. The prediction CV-RMSE results, adopting data from the hybrid model, reach 3.03% at best and 7.99% at worst respectively compared to the samples recorded.
如今,人类一生中90%以上的时间都是在室内度过的,这导致了各种建筑能耗的急剧增加。因此,近年来对环境友好型建筑的研究越来越受欢迎,其中能耗预测是一种很有前途的方法。然而,由于样本不足,预测的准确性不高。本文提出了一种基于生成式对抗网络的新型数据生成模型,称为HMSP,它可以在少量可用样本的情况下鲁棒地生成更多的数据。采用混合模型数据的预测CV-RMSE结果与记录样本相比,最好达到3.03%,最差达到7.99%。
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引用次数: 0
Effect of Baseline Distance and Corner Consistency on Binocular Visual Locating 基线距离和角点一致性对双目视觉定位的影响
Pub Date : 2020-12-11 DOI: 10.1109/ICCC51575.2020.9345063
Peng Li, Changyou Zhang, Jiachao Peng, Ying Ding, Jinqing Zhan
Taking baseline distance and corner consistency of checkerboard calibration board as objects and combining stereo matching algorithm, the influence of baseline distance and corner consistency on camera calibration and binocular vision locating error is analyzed through building binocular vision locating system. The results show that the calibration error decreases with the increase of angular consistency and baseline distance, and finally tends to be stable. Under the condition of the same baseline distance, the locating error decreases with the increase of angular consistency. The calibration plate with large angular consistency has better locating error stability. The research has practical value for the design of binocular vision locating system's baseline distance and angular consistency.
以棋盘标定板的基线距离和角点一致性为目标,结合立体匹配算法,通过构建双目视觉定位系统,分析了基线距离和角点一致性对摄像机标定和双目视觉定位误差的影响。结果表明,标定误差随角度一致性和基线距离的增加而减小,最终趋于稳定。在基线距离相同的情况下,定位误差随角度一致性的增加而减小。角一致性大的标定板具有较好的定位误差稳定性。该研究对双目视觉定位系统的基线距离和角度一致性设计具有实用价值。
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引用次数: 0
期刊
2020 IEEE 6th International Conference on Computer and Communications (ICCC)
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