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Dynamic resource allocation on Vehicular edge computing and communication 基于车辆边缘计算和通信的动态资源分配
Senyu Yu, Yan Guo, Ning Li, Duan Xue, Cuntao Liu
The improvement of modern communication technology has made the Internet of Vehicles (IoV) advance by leaps and bounds, and promotes the progress of many technologies, such as mobile sensing, vehicular edge computing, sensor networks, satellite positioning, data analysis, etc. Vehicular edge computing (VEC) is an innovative computing paradigm which can provide flexible and reliable computation services for intelligent and connected vehicles. An optimized problem is formulated to minimize the total task offloading time delay by making a tradeoff between vehicle mobility and task nature. To tackle the optimization problem, we proposed the Delay-sensitive half-Determined atomic Search algorithm, called DeshDaS, in which we regard each intelligent vehicle as an atom and strategy as electron and consider electron transition process. Experimental results validate the effectiveness and superior of our algorithm compared with several existed offloading strategy, and the larger average amount of data waiting to be processed, the more significant our advantage is.
现代通信技术的完善,使车联网突飞猛进,推动了移动传感、车载边缘计算、传感器网络、卫星定位、数据分析等诸多技术的进步。车辆边缘计算(vehicle edge computing, VEC)是一种创新的计算范式,能够为智能网联车辆提供灵活可靠的计算服务。通过在车辆机动性和任务性质之间进行权衡,建立了最小化总任务卸载时间延迟的优化问题。为了解决优化问题,我们提出了延迟敏感半确定原子搜索算法(DeshDaS),该算法将每辆智能汽车视为一个原子,将策略视为电子,并考虑电子跃迁过程。实验结果验证了该算法与现有几种卸载策略的有效性和优越性,等待处理的平均数据量越大,优势越显著。
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引用次数: 0
The Enhanced Usage Control for data sharing in Industrial Internet 工业互联网数据共享的增强使用控制
Zhong Na, Kai Li, Wei Liu, Zhifeng Gao
Usage control (UCON) model realizes the usage control of resources by integrating authorization, obligations and conditions and providing characteristics of decision continuity and attribute mutability. In order to better adapt to the data interaction demand in the industrial Internet environment, the enhanced UCON(EN-UCON) model is proposed to extend the UCON model to maintain the persistent control of obligations in the lifecycle of resources usage. Firstly, the continuous monitoring of obligations is implemented through the post obligation model. And then, the performance of the obligation is recorded through the trust level, which will be incorporated into the subsequent authorization strategy as an important factor. Finally, the application of EN-UCON model in the industrial Internet interaction scenario is described through a specific case.
使用控制(UCON)模型通过整合授权、义务和条件,提供决策连续性和属性可变性的特点,实现对资源的使用控制。为了更好地适应工业互联网环境下的数据交互需求,提出增强UCON(EN-UCON)模型,对UCON模型进行扩展,保持对资源使用生命周期内义务的持续控制。首先,通过岗位义务模式实现义务的持续监测。然后,通过信任级别记录义务的履行情况,并将其作为重要因素纳入后续的授权策略。最后,通过具体案例描述了EN-UCON模型在工业互联网交互场景中的应用。
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引用次数: 0
Construction of Nonlinear Optimal Diffusion Functions over Finite Fields 有限域上非线性最优扩散函数的构造
B. Shen, Yu Zhou
The diffusion function with large branch number is a fundamental building block in the construction of many block ciphers to achieve provable bounds against differential and linear cryptanalysis. Conventional diffusion functions, which are constructed based on linear error-correction code, has the undesirable side effect that a linear diffusion function by itself is “transparent” (i.e., has transition probability of 1) to differential and linear cryptanalysis. Nonlinear diffusion functions are less studied in cryptographic literature, up to now. In this paper, we propose a practical criterion for nonlinear optimal diffusion functions. Using this criterion we construct generally a class of nonlinear optimal diffusion functions over finite field. Unlike the previous constructions, our functions are non-linear, and thus they can provide enhanced protection against differential and linear cryptanalysis.
具有大分支数的扩散函数是构造许多分组密码以实现抗微分和线性密码分析的可证明界的基本组成部分。传统的扩散函数是基于线性纠错码构建的,它有一个不良的副作用,即线性扩散函数本身对微分和线性密码分析是“透明的”(即转移概率为1)。迄今为止,密码学文献中对非线性扩散函数的研究较少。本文给出了非线性最优扩散函数的一个实用判据。利用这一准则构造了有限域上的一类非线性最优扩散函数。与前面的结构不同,我们的函数是非线性的,因此它们可以提供针对微分和线性密码分析的增强保护。
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引用次数: 0
Non-Intrusive Load Identification Based on Complex Spectrum and Support Vector Machine 基于复谱和支持向量机的非侵入式负载识别
Lingling Tu, Gaoyan Cai, Bingji Liang, Weining Mao
Aiming at the problem that the load identification accuracy of non-intrusive load monitoring (NILM) is greatly affected by the power of loads and the number of background loads, a non-intrusive load identification method based on the current complex spectrum and support vector machine (SVM) is proposed. Through the high-frequency sampling of the load's voltage and current, the complex spectrum of the current is extracted by the fast Fourier transform (FFT), and the multi-class SVM load identification model is established and optimized to realize the non-intrusive load identification. The algorithm is verified using the PLAID datasets, and the load identification accuracy of the algorithm is compared with SVM classifiers based on total harmonic distortion rate (THD), harmonic component ratio and harmonic amplitude. The results of the experiments show that the proposed method not only improves the identification accuracy of low-power loads, but also has higher identification accuracy and better identification robustness of switching load in multi-load scenarios.
针对非侵入式负荷监测(NILM)的负荷识别精度受负荷功率和背景负荷数量影响较大的问题,提出了一种基于当前复杂谱和支持向量机(SVM)的非侵入式负荷识别方法。通过对负载电压和电流的高频采样,利用快速傅里叶变换(FFT)提取电流的复谱,建立并优化多类SVM负载识别模型,实现非侵入式负载识别。利用PLAID数据集对算法进行了验证,并与基于总谐波失真率(THD)、谐波分量比和谐波幅值的SVM分类器进行了负载识别精度比较。实验结果表明,该方法不仅提高了低功耗负载的识别精度,而且在多负载场景下对切换负载具有更高的识别精度和更好的识别鲁棒性。
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引用次数: 0
Distributed Learning based on Asynchronized Discriminator GAN for remote sensing image segmentation 基于异步判别器GAN的分布式学习遥感图像分割
Mingkang Yuan, Ye Li, Jiaxi Sun, Baokun Shi, Jinzhong Xu, Lele Xu, Yisu Wang
Remote sensing images are usually distributed in different departments and contain private information, so they normally cannot be available publicly. However, it is a trend to jointly use remote sensing images from different departments, because it normally enables the model to capture more information and remote sensing image analysis based on deep learning generally requires lots of training data. To address the above problem, in this paper, we apply a distributed asynchronized discriminator GAN framework (DGAN) to jointly learn remote sensing images from different client nodes. The DGAN is composed of multiple distributed discriminators and a central generator, and only the synthetic remote sensing images generated by the DGAN are used to train a semantic segmentation model. Based on DGAN, we establish an experimental platform composed of multiple different hosts, which adopts socket and multi-process technology to realize asynchronous communication between hosts, and visualize the training and testing process. During DGAN training, instead of original remote sensing images or convolutional network model information, only synthetic images, losses and labeled images are exchanged between nodes. Therefore, the DGAN well protects the privacy and security of the original remote sensing images. We verify the performance of the DGAN on three remote sensing image datasets (City-OSM, WHU and Kaggle Ship). In the experiments, we take different distributions of remote sensing images in client nodes into consideration. The experiments show that the DGAN has a great capacity for distributed remote sensing image learning without sharing the original remote sensing images or the convolutional network model. Moreover, compared with a centralized GAN trained on all remote sensing images collected from all client nodes, the DGAN can achieve almost the same performance in semantic segmentation tasks for remote sensing images.
遥感图像通常分布在不同的部门,包含私人信息,因此通常不能公开获取。然而,联合使用不同部门的遥感图像是一个趋势,因为它通常可以使模型捕获更多的信息,而基于深度学习的遥感图像分析通常需要大量的训练数据。为了解决上述问题,本文采用分布式异步判别器GAN框架(DGAN)对不同客户端节点的遥感图像进行联合学习。DGAN由多个分布式鉴别器和一个中央生成器组成,仅使用DGAN生成的合成遥感图像来训练语义分割模型。基于DGAN,我们建立了一个由多台不同主机组成的实验平台,该平台采用套接字和多进程技术实现主机间异步通信,并将训练和测试过程可视化。在DGAN训练过程中,节点之间只交换合成图像、损失图像和标记图像,而不是原始遥感图像或卷积网络模型信息。因此,DGAN很好地保护了原始遥感图像的隐私性和安全性。我们在三个遥感图像数据集(City-OSM, WHU和Kaggle Ship)上验证了DGAN的性能。在实验中,我们考虑了客户端节点遥感图像的不同分布。实验表明,在不共享原始遥感图像和卷积网络模型的情况下,DGAN具有很强的分布式遥感图像学习能力。此外,与对从所有客户端节点收集的所有遥感图像进行集中训练的GAN相比,DGAN在遥感图像的语义分割任务中可以达到几乎相同的性能。
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引用次数: 1
Evaluation of Waveform RF Stealth Performance Based on Relative Entropy 基于相对熵的波形射频隐身性能评价
Min Zhao, Siyu Xu, Bing-Gang Sun
RF stealth waveform design is an essential technology in RF stealth radar. LPI performance evaluation of waveforms becomes more and more critical. Several radars transmit waveforms are designed through compound modulation, and the relative entropy between the signal and Gaussian White Noise is used as an index to evaluate the LPI performance of the waveform. At the same time, two methods of ambiguity function and interception factor are used to compare and verify them. The final simulation realizes the quantitative evaluation of waveform RF stealth performance based on relative entropy.
射频隐身波形设计是射频隐身雷达的关键技术。波形的LPI性能评价变得越来越重要。通过复合调制设计了几种雷达发射波形,并以信号与高斯白噪声之间的相对熵作为评价波形LPI性能的指标。同时,采用模糊函数和拦截因子两种方法对其进行比较验证。最后仿真实现了基于相对熵的波形射频隐身性能定量评价。
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引用次数: 0
Optimization Tracking Algorithm Based on Extended Target Gaussian Mixture PHD Filter 基于扩展目标高斯混合PHD滤波器的优化跟踪算法
Li-wei Guo, Xinglin Shen, Shanzhu Xiao, Huanzhang Lu
Under low signal-to-noise ratio (SNR) target tracking, poor target information and high clutter limit the tracking effect. Extended targets potentially generate more than one measurement per time step. Multiple extended targets tracking is therefore can be used to improve tracking performance with low SNR, due to the expanded data than point targets tracking. Based on the classical probability hypothesis density (PHD) filter, the extended target PHD (ET- PHD) filter is proposed to track multiple extended targets. The main contribution of this paper is the improvement of the classical extended target Gaussian-mixture probability hypothesis density (ET-GM-PHD) filter. A method based on the ET-GM-PHD filter is proposed for decreasing false alarms and improving measurement set partition performance under low SNR cases. The optimized method is shown a better tracking performance in estimation accuracy of the targets number and targets state in comparison with a point PHD filter.
在低信噪比的目标跟踪条件下,目标信息差、杂波高限制了跟踪效果。扩展目标可能在每个时间步产生多个测量。多扩展目标跟踪因此可以用于提高低信噪比的跟踪性能,由于数据比点目标跟踪扩展。在经典概率假设密度(PHD)滤波器的基础上,提出了扩展目标密度(ET- PHD)滤波器,用于跟踪多个扩展目标。本文的主要贡献是改进了经典的扩展目标高斯混合概率假设密度滤波器(ET-GM-PHD)。提出了一种基于ET-GM-PHD滤波器的低信噪比下减少误报和提高测量集分割性能的方法。与点PHD滤波相比,优化后的方法在目标数和目标状态的估计精度方面具有更好的跟踪性能。
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引用次数: 0
Post quantum identity authentication mechanism in blockchain 区块链中的后量子身份认证机制
Peng Duan, Bo Zhou
The blockchain technology has developed rapidly in recent years and has been widely used in all walks of life. However, most of the authentication systems adopted by the current blockchain technology are public key infrastructure based on large integer decomposition or discrete logarithm difficulties, and these cryptosystems are not secure in the quantum environment. Therefore, this paper considers an identity based post quantum authentication system applicable to the blockchain, which provides anti quantum protection and eliminates the dependence on public key certificates. Under the control of the supervision node, the authentication system has the key revocation function.
区块链技术近年来发展迅速,已广泛应用于各行各业。然而,目前区块链技术采用的认证系统大多是基于大整数分解或离散对数困难的公钥基础设施,这些密码系统在量子环境下并不安全。因此,本文考虑了一种适用于区块链的基于身份的后量子认证系统,该系统提供反量子保护,消除了对公钥证书的依赖。在监督节点的控制下,认证系统具有密钥撤销功能。
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引用次数: 0
Fully Fused Cover Song Identification Model via Feature Fusing and Clustering 基于特征融合和聚类的全融合翻唱识别模型
Qiang Yuan, Shibiao Xu, Li Guo
In recent years, Cover Song Identification (CSI) based on Siamese Network and music representation learning has achieved good performance, however, there are still many problems such as limited feature fusion, missing decision threshold and single data label. In this paper, we propose a novel fully fused cover song identification model via feature fusing and clustering. In our proposed model, there are a fusion feature extraction structure, a channel separation decision structure, and a music feature clustering structure. First, we combine the pre-processing features of the dual input along the channel dimension to achieve full feature fusion and increase the fusion degree of the two songs in the feature extraction process. Secondly, we introduce channel separation to calculate multi-channel cross-features to improve the ability of the model to learn the difference between feature channels, and combined with the binary decision network to avoid the shortcomings of lack of decision thresholds in music representation learning. Finally, feature clustering generates invisible feature labels to enriches the types of cover data labels and reduces the difficulty of training. The model is trained in stages to optimize the clustering loss and the classification loss for cover and non-cover pairs, respectively. The model is validated on three public datasets, and experiments show that our model could achieve competitive results.
近年来,基于Siamese网络和音乐表示学习的翻唱歌曲识别(CSI)取得了较好的成绩,但仍存在特征融合有限、决策阈值缺失、数据标签单一等问题。本文提出了一种基于特征融合和聚类的全融合翻唱歌曲识别模型。在我们提出的模型中,有一个融合特征提取结构、一个通道分离决策结构和一个音乐特征聚类结构。首先,我们将双输入的预处理特征沿通道维度进行组合,实现充分的特征融合,在特征提取过程中增加两首歌曲的融合程度。其次,我们引入通道分离来计算多通道交叉特征,以提高模型学习特征通道之间差异的能力,并结合二值决策网络来避免音乐表征学习中缺乏决策阈值的缺点。最后,特征聚类生成不可见的特征标签,丰富了覆盖数据标签的类型,降低了训练难度。该模型分阶段进行训练,分别优化覆盖对和非覆盖对的聚类损失和分类损失。在三个公开的数据集上对模型进行了验证,实验表明我们的模型可以获得有竞争力的结果。
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引用次数: 0
Analysis of MOOC's Continuous Learning Intention and Its Influencing Factors of Higher Vocational Students 高职生MOOC持续学习意愿及其影响因素分析
Fengmei Zhao, Yong Hu
While MOOC brings a great impact to higher education, there is also the problem of low course completion rate, and it is important to analyze the factors influencing learners' continuous learning and participation in Massive Open Online Course (MOOC) for improving the teaching quality of MOOC. This paper constructs a model to predict and explain learners' MOOC continuous learning intention based on expectation confirmation model, technology acceptance model, planned behavior theory and flow theory, and carries out a questionnaire survey on students of our university who participate in the general elective courses on the platform of Chinese University MOOC. The results based on structural equation modeling show that expected confirmation and perceived ease of use significantly influence learners' perceived usefulness of MOOC; perceived usefulness and perceived ease of use significantly influence learners' attitudes towards MOOC; expected confirmation and perceived usefulness significantly influence learning satisfaction; perceived ease of use, satisfaction, attitude, focus, Perceived behavior control and subjective norms significantly influence learners' MOOC continuous learning intention. Based on the data analysis, the researcher discusses the theoretical and practical significance of this study and proposes the follow-up research plan.
MOOC在给高等教育带来巨大影响的同时,也存在着课程完成率低的问题,分析影响学习者持续学习和参与大规模在线开放课程(Massive Open Online course, MOOC)的因素,对于提高MOOC的教学质量具有重要意义。本文基于期望确认模型、技术接受模型、计划行为理论和流理论构建了预测和解释学习者MOOC持续学习意愿的模型,并对我校在中国大学MOOC平台上参加普通选修课的学生进行了问卷调查。基于结构方程模型的研究结果表明,期望确认和感知易用性显著影响学习者对MOOC的感知有用性;感知有用性和感知易用性显著影响学习者对MOOC的态度;期望确认和感知有用性显著影响学习满意度;感知易用性、满意度、态度、关注点、感知行为控制和主观规范显著影响学习者的MOOC持续学习意愿。在数据分析的基础上,探讨了本研究的理论意义和现实意义,并提出了后续的研究计划。
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引用次数: 1
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Proceedings of the 8th International Conference on Communication and Information Processing
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