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A Novel Graph Structure Learning Based Semi-Supervised Framework for Anomaly Identification in Fluctuating IoT Environment

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 3001-3016页

作者： Weijian song Xi Li Peng Chen Juan Chen Jianhua Ren Yunni xia School of Computer and Software Engineering Xihua UniversityChengdu610039China West China Second University Hospital Sichuan UniversityChengdu610065China School of Computer Science Chongqing UniversityChongqing400044China

With the rapid development of Internet of Things(IoT)technology,IoT systems have been widely applied in health-care,transportation,home,and other ***,with the continuous expansion of the scale and increasing complexity of IoT systems,the stability and security issues of IoT systems have become increasingly ***,it is crucial to detect anomalies in the collected IoT time series from various ***,deep learning models have been leveraged for IoT anomaly ***,owing to the challenges associated with data labeling,most IoT anomaly detection methods resort to unsupervised learning ***,the absence of accurate abnormal information in unsupervised learning methods limits their *** address these problems,we propose AS-GCN-MTM,an adaptive structural Graph Convolutional Networks(GCN)-based framework using a mean-teacher mechanism(AS-GCN-MTM)for anomaly *** performs better than unsupervised methods using only a small amount of labeled *** Teachers is an effective semi-supervised learning method that utilizes unlabeled data for training to improve the generalization ability and performance of the ***,the dependencies between data are often unknown in time series *** solve this problem,we designed a graph structure adaptive learning layer based on neural networks,which can automatically learn the graph structure from time series *** not only better captures the relationships between nodes but also enhances the model’s performance by augmenting key *** have demonstrated that our method improves the baseline model with the highest F1 value by 10.4%,36.1%,and 5.6%,respectively,on three real datasets with a 10%data labeling rate.

关键词： IoT multivariate time series anomaly detection graph learning semi-supervised mean teachers

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Secure Communication Based on Quantum Key

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Communications in Theoretical Physics 2008年第3期49卷 635-638页

作者： song Jie xia Yan song He-Shan School of Physic and Optoelectronic Technology Dalian University of Technology Dalian 116024 China

We introduce a protocol for QKD based on reusable entangled *** this protocol,the EPR pairs act as a quantum key to encode and decode information *** only an information particle travels between the legitimated *** improves the security and efficiency of *** addition,we show that its extension to a new QSS protocol is also secure and efficient.

关键词：量子纠缠通信系统安全技术安全措施

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动力理论视域下大学生就业质量提升的路径

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榆林学院学报 2024年第1期34卷 103-107页

作者：高雪依杨军良卢凯段钰艾玉宋云霞西北大学物理学院陕西西安710129

采用问卷调查分析法,分析大学生就业期待、就业心理和就业前准备,运用动力学理论构建运用激发求职内驱力和增强求职外推力,对不同就业群体进行分类指导,为提升大学生高质量就业提供全新视角和实施路径。

关键词：高校毕业生就业质量动力学理论分类指导

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急性心肌梗死后严重机械并发症1例

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心脏杂志 2024年第2期36卷 244-246页

作者：马如超陈刚王炜宋瑞霞魏涛涛冯英林欣兰州大学第二医院心内科甘肃兰州730030 兰州大学第二医院体外循环科甘肃兰州730030

1临床资料患者,男性,57岁,因“间断胸痛3 d,加重12 h”入院。患者于入院前3 d无明显诱因出现胸痛、呈闷痛、位于心前区,范围约手掌大小,余无不适,上述症状每次持续数min后自行缓解,当时未予以重视。于入院前12 h再次出现上述症状,性质同... 详细信息

1临床资料患者,男性,57岁,因“间断胸痛3 d,加重12 h”入院。患者于入院前3 d无明显诱因出现胸痛、呈闷痛、位于心前区,范围约手掌大小,余无不适,上述症状每次持续数min后自行缓解,当时未予以重视。于入院前12 h再次出现上述症状,性质同前,程度加重,伴全身乏力,伴胸闷气短,就诊于当地县级医院,诊断为急性心肌梗死(AMI),准备溶栓治疗时患者突发呼吸急促、烦躁不安及血压下降.

关键词：急性心肌梗死机械并发症

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Acid-rock reaction kinetics in a two-scale model based on reaction order correction

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Petroleum Science 2024年第3期21卷 2089-2101页

作者： Xue-song Li Ning Qi Ze-Hui Zhang Lian Liu xia-Qing Li Xu-Hang Su School of Petroleum Engineering China University of Petroleum(East China) Key Lab of Unconventional Oil & Gas Development Ministry of Education China University of Petroleum(East China) SINOPEC Northwest Oilfield Branch Company Petroleum Engineering Technology Research Institute SINOPEC Shengli Oilfield Company

The reaction order plays a crucial role in evaluating the response rate of acid-rock. However, the conventional two-scale model typically assumes that the reaction order is constant as one, which can lead to significant deviations from reality. To address this issue, this study proposes a novel multi-order dynamic model for acid-rock reaction by combining rotating disk experimental data with theoretical *** numerical simulations, this model allows for the investigation of the impact of acidification conditions on different orders of reaction, thereby providing valuable insights for on-site *** analysis reveals that higher response orders require higher optimal acid liquid flow rates, and lower optimal H+diffusion coefficients, and demonstrate no significant correlation with acid ***, it is recommended to increase the displacement and use high-viscosity acid for reservoirs with high calcite content, while reducing the displacement and using low-viscosity acid for reservoirs with high dolomite content.

关键词： Reaction order Two-scale model Wormhole propagation Carbonate rocks Numerical simulation

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Targeting Haemaphysalis longicornis serpin to prevent tick feeding and pathogen transmission

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Insect Science 2024年第3期31卷 694-706页

作者： Tingting Feng Hao Tong Qianqian Zhang Zhihao Ming Zhenyu song xia Zhou Jianfeng Dai Institute of Biology and Medical Sciences Jiangsu Key Laboratory of Infection and ImmunitySoochow UniversitySuzhouJiangsu ProvinceChina School of Biology and Basic Medical Science Suzhou Medical College of Soochow UniversitySuzhouJiangsu ProvinceChina

Serine proteinase inhibitors(serpins),identified from the hard tick Haemaphysalis longicornis of China,play significant roles in various animal physiological *** this study,we showed that *** serpins(Hlserpin-a and Hlserpin-b)were induced during blood-feeding in nymph ticks and exhibited anticoagulation activity in *** Hlserpins through RNA interference(RNAi)significantly impaired tick *** of mice with recombinant Hlserpins or passive transfer of Hlserpin antiserum significantly curtails the efficacy of tick ***,the transmission of the Langat virus(LGTV)from ticks to mice witnessed a substantial decrease when Hlserpins were *** findings suggest that inhibiting Hlserpins can hamper tick engorgement and pathogen transmission,indicating the potential of Hlserpins as a vaccine to countertick-borne diseases.

关键词： feeding LGTV serpin TBEV tick

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螺栓球与圆钢管组合试件的超低周疲劳试验研究

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建材技术与应用 2024年第3期 37-41页

作者：张洁宋夏芸李卫文杜雷鸣李海旺山西工程职业学院山西太原030009 太原理工大学土木工程学院山西太原030024

随着社会经济的发展,越来越多的大跨度空间网格结构成为城市避难场所,因而强震下空间网格结构的安全性显得尤为重要。为研究螺栓球与圆钢管组合试件的超低周疲劳性能,对其进行了超低周疲劳试验,获得了组合试件超低周疲劳破坏形态的相关... 详细信息

随着社会经济的发展,越来越多的大跨度空间网格结构成为城市避难场所,因而强震下空间网格结构的安全性显得尤为重要。为研究螺栓球与圆钢管组合试件的超低周疲劳性能,对其进行了超低周疲劳试验,获得了组合试件超低周疲劳破坏形态的相关数据。试验数据表明:构件在整体失稳的情况下仍表现出稳定的滞回性能。对比分析了9种螺栓直径对试件滞回性能、骨架曲线和刚度退化的影响。

关键词：网格结构超低周疲劳试验滞回性能骨架曲线

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基于OpenSEES的圆钢管与螺栓球组配件的抗震性能研究

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建材技术与应用 2024年第2期 22-26页

作者：宋夏芸李卫文张洁杜雷鸣李海旺山西工程职业学院山西太原030009 太原理工大学土木工程学院山西太原030024

空间网格结构的超低周疲劳破坏隐患直接威胁着强震时数以万计的该类建筑安全性能。基于OpenSEES有限元分析软件,针对12根两端带螺栓球节点的钢管在大位移循环加载试验下的超低周疲劳性能进行数值模拟,分析得出计及节点影响、杆件双重非... 详细信息

空间网格结构的超低周疲劳破坏隐患直接威胁着强震时数以万计的该类建筑安全性能。基于OpenSEES有限元分析软件,针对12根两端带螺栓球节点的钢管在大位移循环加载试验下的超低周疲劳性能进行数值模拟,分析得出计及节点影响、杆件双重非线性及材料疲劳损伤对螺栓球节点的圆钢管杆件滞回性能、力学指标及耗能性能等超低周疲劳性能的影响。结果表明:加载制度对于试验构件的超低周疲劳性能有直接影响,数值模拟与试验结果相近,所采用的疲劳损伤本构能够较为准确地描述构件超低周疲劳特性。

关键词：空间网格结构 OpenSEES有限元分析疲劳损伤本构超低周疲劳性能

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OCTA characteristics in non-arteritic central retinal artery occlusion and correlation with visual acuity

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 289-296页

作者： Hong-xia Gong Bin Wu Shi-Yong Xie Wei Zhang song Chen Tianjin Key Lab of Ophthalmology and Visual Science Department of Ophthalmology for Integrated Traditional Chinese and Western MedicineTianjin Eye HospitalTianjin 300020China Clinical College of Ophthalmology Tianjin Medical UniversityTianjin 300010China Eye Hospital Affiliated to Nankai University Tianjin 300020China

AIM:To observe the retinal and choroidal circulations in patients with non-arteritic permanent central retinal artery occlusion(NA-CRAO)via optical coherence tomography angiography(OCTA)and analyze their correlation with visual ***:Sixty-two eyes with clinically confirmed acute NA-CRAO were included in the study and divided into:A type(mild n=29),B type(moderate n=27)and C type(severe n=6)based on the degree of visual loss,retinal edema,and arterial blood flow delay in fundus fluorescence angiography(FFA).Contralateral healthy eyes were used as the control ***-corrected visual acuity(BCVA),slit lamp microscopy,indirect ophthalmoscopy,fundus color photography,OCTA,and FFA were ***’s correlation analysis was used to determine the correlations between retinal and choroidal vessels and visual ***:There were no statistically significant differences in age,gender,and intraocular pressure among the three types and the control group(P>0.05).Vessel density in deep capillary plexus(VD-DCP)significantly decreased(P<0.05)in all three types of NA-CRAO patients compared to the control *** density in superficial vascular plexus(VD-SVP)significantly decreased(P<0.05)in type A patients and choriocapillaris flow area significantly decreased(P<0.05)in type B and type C patients compared to the control group;while outer retinal flow areas significantly increased in the type A(P<0.05)and decreased in type C patients(P<0.05).The retinal thickness significantly increased in type C group(P<0.05).The VD-SVP at fovea in the type A was significantly lower than both of type B and *** VD-SVP at nasal parafovea in type A and B was significantly lower than type C(P<0.05).The logMAR BCVA of type A was significantly better than that of type B and C groups(P<0.05).Spearman’s correlation analysis showed that the logMAR BCVA was positively correlated with VD-SVP at fovea(r=0.679,P=0.031)and nasal parafovea(r=0.826,P=0.013).CONCLUSION:OCTA is valua

关键词： non-arteritic central retinal artery occlusion fundus fluorescence angiography optical coherence tomography angiography retinal vessel density visual acuity

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A survey on vision-based UAV navigation

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Geo-Spatial Information Science 2018年第1期21卷 21-32页

作者： Yuncheng Lu Zhucun Xue Gui-song xia Liangpei Zhang State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina

Research on unmanned aerial vehicles(UAV)has been increasingly popular in the past decades,and UAVs have been widely used in industrial inspection,remote sensing for mapping&surveying,rescuing,and so ***,the limited autonomous navigation capability severely hampers the application of UAVs in complex environments,such as GPS-denied ***,researchers mainly focused on the use of laser or radar sensors for UAV *** the rapid development of computer vision,vision-based methods,which utilize cheaper and more flexible visual sensors,have shown great advantages in the field of UAV *** purpose of this article is to present a comprehensive literature review of the vision-based methods for UAV *** on visual localization and mapping,obstacle avoidance and path planning,which compose the essential parts of visual ***,throughout this article,we will have an insight into the prospect of the UAV navigation and the challenges to be faced.

关键词： Unmanned aerial vehicles(UAV) visual SLAM obstacle avoidance path planning

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