Results 1 to 10 of about 19,864 (168)
Kongjian kexue xuebao, 2023 随着卫星系统复杂程度的日益增加，综合分析卫星多元参数之间的相关性异常对于卫星安全运行和空间任务的正确执行具有重要意义。利用某卫星工程参数数据，基于符号聚合近似算法（SAX），研究卫星多元工程参数的异常检测问题，解决了当前异常检测方法中多元参数融合时不考虑上下文信息造成信息丢失的问题，实现多元参数有效融合，形成一种优化的基于快速动态时间规整算法（Fast-DTW）的异常检测算法。研究结果表明，模型在某卫星电源子系统的异常检测过程中，recall，precision和F1 score分别为0.947，0 ...
宋 华婷, 刘 玉荣
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Anomaly detection model for multivariate time series based on stochastic Transformer [PDF]
, 2023 Aiming at the problem that the existing multivariate time series anomaly detection models based on variational autoencoders could not propagate long-term temporal dependencies between stochastic variables in latent space, the stochastic Transformer for ...
Rui LIANG, Weigang HUO, Yonghua LI
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Overview of anomaly detection techniques for industrial Internet of things [PDF]
, 2022 In view of the differences of existing anomaly detection methods and the applicability when applied to security protection of the industrial Internet of things (IIoT), based on technical principles, the network anomaly detection papers published from ...
Haili SUN +4 more
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Multi-dimensional time series anomaly detection method based on VAE-WGAN [PDF]
, 2022 As the deficiency of learning ability of traditional semi-supervised depth anomaly detection model to unbalanced multidimensional data distribution and the difficulty of model training, a multi-dimensional time series anomaly detection method based on ...
Kun WANG, Xueyuan DUAN, Yu FU
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Novel video anomaly detection method based on global-local self-attention network [PDF]
, 2023 In order to improve the accuracy of video anomaly detection, a novel video anomaly detection method based on global-local self-attention network was proposed.Firstly, the video sequence and the corresponding RGB sequence were fused to highlight the ...
Chengmao WU, Jing YANG, Liuping ZHOU
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基于数据中台的科技型产业园区能效管理平台研究与应用 [PDF]
, 2023 当前产业园区能效管理平台建设过程主要采用“烟囱式”的体系架构，存在建设成本高、重复开发、技术能力难以积累，数据不共享、可扩展性差等弊端。为此，以科技型产业园区低碳转型为切入点，通过引入数据中台概念对园区多源异构大数据进行汇聚和存储，为前端业务提供可共享复用、可快速构建的数据应用服务，探索智慧园区能效精细化管理方式。以上海市某科技型产业园区为实证，基于数据中台构建能效管理平台，依托平台积累的数据、特征算子及模型资产，驱动用电异常检测、用电时序预测等数据应用的快速构建，为园区实现节能减排 ...
孙成, 崔一澜*
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Anomaly Detection Framework of System Call Trace Based on Sequence and Frequency Patterns [PDF]
, 2022 The existing system call-based anomaly intrusion detection methods can’t accurately describe the behavior of the process by a single trace pattern.In this paper,the process behavior is modeled based on the sequence and frequency patterns of system call ...
WEI Hui, CHEN Ze-mao, ZHANG Li-qiang
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Network traffic anomaly detection method based on multi-scale characteristic [PDF]
, 2022 Aiming at the problem that most of the traditional network traffic anomaly detection methods only pay attention to the fine-grained features of traffic data, and make insufficient use of multi-scale feature information, which may lead to low accuracy of ...
Bin LI +4 more
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GAD:topology-aware time series anomaly detection [PDF]
, 2020 To solve the problems of anomaly detection,intelligent operation,root cause analysis of node equipment in the network,a graph-based gated convolutional codec anomaly detection model was proposed for time series data such as link delay,network throughput ...
Jingyu WANG, Qi QI, Runye SHEN
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, 2018 性染色体数目异常疾病是一类严重困扰人类生活的综合征,患者多能生存,但常有性腺发育不全、多发畸形、不育等异常表现。该病无法治愈,经激素替代治疗等干预措施可有效缓解症状,但早期确诊严重依赖于相关临床诊断技术的发展。该文拟就现今常见检测性染色体数目异常技术的发展作一综述,比较各技术优缺点及评价其在临床诊断中的应用价值,以方便检验工作者科学合理地采用相关技术,为临床提供更为准确可靠的实验室依据,推进对该类疾病的诊治与研究。国家自然科学基金面上项目(81572084);;厦门市科技重大专项 ...
周裕林, 郑欣怡
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