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FlowGANAnomaly: Flow-Based Anomaly Network Intrusion Detection with Adversarial Learning

Chinese Journal of Electronics 2024年第1期33卷 58-71页

作者： zeyi li Pan WANG Zixuan WANG School of Computer Science Nanjing University of Posts and Telecommunications School of Modern Posts Nanjing University of Posts and Telecommunications School of Internet of Things Nanjing University of Posts and Telecommunications

In recent years, low recall rates and high dependencies on data labelling have become the biggest obstacle to developing deep anomaly detection(DAD) techniques. Inspired by the success of generative adversarial networks(GANs) in detecting anomalies in computer vision and imaging, we propose an anomaly detection model called Flow GANAnomaly for detecting anomalous traffic in network intrusion detection systems(NIDS). Unlike traditional GAN-based approaches, which are composed of a flow encoder, a convolutional encoder-decoder-encoder, a flow decoder and a convolutional encoder, the architecture of this model consists of a generator(G) and a discriminator(D).Flow GANAnomaly maps the different types of traffic feature data from separate datasets to a uniform feature space,thus can capture the normality of network traffic data more accurately in an adversarial manner to mitigate the problem of the high dependence on data labeling. Moreover, instead of simply detecting the anomalies by the output of D, we proposed a new anomaly scoring method that integrates the deviation between the output of two Gs’ convolutional encoders with the output of D as weighted scores to improve the low recall rate of anomaly detection. We conducted several experiments comparing existing machine learning algorithms and existing deep learning methods(Auto Encoder and VAE) on four public datasets(NSL-KDD, CIC-IDS2017, CIC-DDo S2019, and UNSW-NB15). The evaluation results show that Flow GANAnomaly can significantly improve the performance of anomaly-based NIDS.

关键词： Deep learning Machine learning algorithms Computational modeling Network intrusion detection Imaging Telecommunication traffic Generative adversarial networks

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Spatiotemporal Evolution and Influencing Factors of Urban-rural Construction Land in Rural Industrialized Areas in China:Case Studies in Changyuan City and Xinxiang County of Henan Province

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Chinese Geographical Science 2023年第5期33卷 850-864页

作者： SHI Yanwen li Xiaojian HU Xueyao li zeyi Collaborative Innovation Center of Urban-rural Coordination/School of Resources and Environment Henan University of Economics and LawZhengzhou 450046China China Center for International Economic Exchanges Beijing 100050China College of Geography and Environmental Science Henan UniversityKaifeng 475000China

Since China’s reform and opening up in 1978,the acceleration of industrialization and urbanization in China had led to dramatic changes in the pattern of urban-rural land *** this paper,we focused on the rural industrialized areas in central China(Xinxiang County and Changyuan City of Henan Province).We used the average nearest neighbor index,spatial statistical analysis,and a structural equation model to analyze the spatiotemporal evolution and influencing factors of urban-rural construction land based on multisource spatial data and survey *** results showed that:1)from 1975 to 2019,the spatial distribution of urban-rural construction land in rural industrialized areas had evolved from homogeneous distribution to local *** terms of comparative analysis of cases,the spatial distribution of urban-rural construction land in Changyuan City had shown a trend from diffusion to agglomeration,and Xinxiang County had overall shown a spatial change from homogenization to agglomeration and then to regional integration development.2)The hot spots with increased urban-rural construction land significantly expanded,and they had a high degree of spatial overlap with industrial *** them,Xinxiang County was concentrated in central and marginal areas,and Changyuan was mainly concentrated in central urban areas.3)From the evolution of spatial proximity of urban-rural construction land,rural industrialized areas generally decline,showing the characteristics of internal differentiation in the rate of change.4)Industrial development,social economy,the policy environment,and urban development played a positive role in promoting the expansion of urban-rural construction land in rural industrialized *** promote the optimal use of regional land and the integrated development of urban-rural areas,we should combine the advantages of regional endowment,formulate development strategies according to local conditions,and adjust the way that land is used in

关键词： urban-rural construction land rural industrialized areas spatiotemporal evolution influencing factors rural industrialization Henan Province,China

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A brief review of metamaterials for opening low-frequency band gaps

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Applied Mathematics and Mechanics(English Edition) 2022年第7期43卷 1125-1144页

作者： Kai WANG Jiaxi ZHOU Dongguo TAN zeyi li Qida liN Daolin XU College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Research Institute of Hunan University in Chongqing Chongqing 401133China

Metamaterials are an emerging type of man-made material capable of obtaining some extraordinary properties that cannot be realized by naturally occurring *** to tremendous application foregrounds in wave manipulations,metamaterials have gained more and more ***,developing research interest of low-frequency vibration attenuation using metamaterials has emerged in the past *** better understand the fundamental principle of opening low-frequency(below 100 Hz)band gaps,a general view on the existing literature related to low-frequency band gaps is *** this review,some methods for fulfilling low-frequency band gaps are firstly categorized and detailed,and then several strategies for tuning the low-frequency band gaps are ***,the potential applications of this type of metamaterial are briefly *** review is expected to provide some inspirations for realizing and tuning the low-frequency band gaps by means of summarizing the related literature.

关键词： metamaterial low-frequency band gap vibration suppression

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Thienothiophene-centered ladder-type π-systems that feature distinct quinoidal π-extension

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Chinese Chemical Letters 2024年第5期35卷 249-253页

作者： Jiaxiang Guo zeyi li Tianyu Zhang Xinyu Tian Yue Wang Chuandong Dou State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials Soochow UniversitySuzhou 215123China

Quinoidalπ-conjugated structures,a kind of fundamental subunits for organicπ-systems,may produce some intriguing optical,electronic and magnetic properties of polycyclic hydrocarbons(PHs).Herein,we report two thienothiophene-centered ladder-type polycyclic molecules(1 and 2),which possess one quinoidal thienothiophene moiety and two para-quinodimethane(p-QDM)subunits,*** theoretically and experimentally studied,while 1 is a fully closed-shell molecule,2 owns an open-shell structure along with partial contribution of tetraradical state that is induced by the resonance of ***,although 2 has a largerπ-conjugated skeleton and open-shell electronic state,it exhibits larger bandgap and blue-shifted *** the other hand,the reversible oxidation activity of 1 enables the preparation of its dication 1^(2+),and the studies on its single-crystal and aromatic structures demonstrate that its two positive charges are delocalized onto the oxygen atoms,thus achieving fullyπ-extended structure and near-infrared *** study not only gains insight into quinoidalπ-subunits,but also provides an important basis for the development of antiaromatic and open-shellπ-electron materials.

关键词： Thienothiophene Quinoidal conjugation Open-shell structure Aromaticity Photophysical properties

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Trusted Encrypted Traffic Intrusion Detection Method Based on Federated Learning and Autoencoder

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China Communications 2024年第8期21卷 211-235页

作者： Wang Zixuan Miao Cheng Xu Yuhua li zeyi Sun Zhixin Wang Pan School of Modern Posts Nanjing University of Posts&TelecommunicationsNanjing 210003China School of Computer Science Nanjing University of Posts&TelecommunicationsNanjing 210003China

With the rapid development of the Internet,network security and data privacy are increasingly *** classical Network Intrusion Detection System(NIDS)based on Deep Learning(DL)models can provide good detection accuracy,but collecting samples for centralized training brings the huge risk of data privacy ***,the training of supervised deep learning models requires a large number of labeled samples,which is usually ***“black-box”problem also makes the DL models of NIDS *** this paper,we propose a trusted Federated Learning(FL)Traffic IDS method called FL-TIDS to address the above-mentioned *** FL-TIDS,we design an unsupervised intrusion detection model based on autoencoders that alleviates the reliance on marked *** the same time,we use FL for model training to protect data *** addition,we design an improved SHAP interpretable method based on chi-square test to perform interpretable analysis of the trained *** conducted several experiments to evaluate the proposed *** first determine experimentally the structure and the number of neurons of the unsupervised AE ***,we evaluated the proposed method using the UNSW-NB15 and CICIDS2017 *** exper-imental results show that the unsupervised AE model has better performance than the other 7 intrusion detection models in terms of precision,recall and ***,federated learning is used to train the intrusion detection *** experimental results indicate that the model is more accurate than the local learning ***,we use an improved SHAP explainability method based on Chi-square test to analyze the *** analysis results show that the identification characteristics of the model are consistent with the attack characteristics,and the model is reliable.

关键词： autoencoder federated learning intrusion detection model interpretation unsupervised learning

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DB-DCAFN:dual-branch deformable cross-attention fusion network for bacterial segmentation

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Visual Computing for Industry,Biomedicine,and Art 2023年第1期6卷 155-170页

作者： Jingkun Wang Xinyu Ma Long Cao Yilin Leng zeyi li Zihan Cheng Yuzhu Cao Xiaoping Huang Jian Zheng School of Biomedical Engineering(Suzhou) Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230026China Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of SciencesSuzhou 215163China Department of Infectious Diseases the First Affiliated Hospital of Soochow UniversitySuzhou 215006China Institute of Biomedical Engineering School of Communication and Information EngineeringShanghai UniversityShanghai 200444China College of Computer and Information Hohai UniversityNanjing 210098China School of Electronic and Information Engineering Changchun University of Science and TechnologyChangchun 130022China Jinan Guoke Medical Technology Development Co. LtdJinan 250101China

Sputum smear tests are critical for the diagnosis of respiratory diseases. Automatic segmentation of bacteria from spu-tum smear images is important for improving diagnostic efficiency. However, this remains a challenging task owing to the high interclass similarity among different categories of bacteria and the low contrast of the bacterial edges. To explore more levels of global pattern features to promote the distinguishing ability of bacterial categories and main-tain sufficient local fine-grained features to ensure accurate localization of ambiguous bacteria simultaneously, we propose a novel dual-branch deformable cross-attention fusion network (DB-DCAFN) for accurate bacterial segmen-tation. Specifically, we first designed a dual-branch encoder consisting of multiple convolution and transformer blocks in parallel to simultaneously extract multilevel local and global features. We then designed a sparse and deformable cross-attention module to capture the semantic dependencies between local and global features, which can bridge the semantic gap and fuse features effectively. Furthermore, we designed a feature assignment fusion module to enhance meaningful features using an adaptive feature weighting strategy to obtain more accurate segmentation. We conducted extensive experiments to evaluate the effectiveness of DB-DCAFN on a clinical dataset comprising three bacterial categories: Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa. The experi-mental results demonstrate that the proposed DB-DCAFN outperforms other state-of-the-art methods and is effective at segmenting bacteria from sputum smear images.

关键词： Bacterial segmentation Dual-branch parallel encoder Deformable cross-attention module Feature assignment fusion module

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中国农业竞争力时空格局演化及其影响因素

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地理学报 2020年第6期75卷 1287-1300页

作者：魏素豪李晶李泽怡宗刚中国人民大学农业与农村发展学院北京100872 北京工业大学经济与管理学院北京100124

基于客观权重赋值法,从自然禀赋、流动投入、产出能力、设施机制4个维度构建指标体系,实证测算了2000-2016年中国29省农业竞争力,利用空间计量模型,剖析了中国农业竞争力时空演化规律及其影响因素,以期为制定针对性、差异化的农业竞争... 详细信息

基于客观权重赋值法,从自然禀赋、流动投入、产出能力、设施机制4个维度构建指标体系,实证测算了2000-2016年中国29省农业竞争力,利用空间计量模型,剖析了中国农业竞争力时空演化规律及其影响因素,以期为制定针对性、差异化的农业竞争力提升政策提供理论支撑。结果表明:①中国农业竞争力呈上升趋势,并存在明显的空间自相关性特征,空间溢出强度呈倒"U"型变化趋势,流动投入、产出能力两项子竞争力呈上升趋势,资源禀赋相对稳定,设施机制波动上升;②东部省份农业竞争力异军突起,中西部省份不断下降,两级分化趋势明显,局域空间集聚格局以高-高和低-低集聚方式为主导,具有较强的稳定性与路径依赖性;③农民收入、居民消费水平、经济基础、R&D投入、种植结构、粮食品种选择对本省农业竞争力时空格局演变存在直接效应,对其他省份存在间接溢出效应;④应充分发挥农业竞争力及其影响因素的示范效应与扩散效应,推动农业资源优化配置、促进农业生产要素合理流动、谋划农业竞争力均衡发展。

关键词：农业竞争力时空演化影响因素空间计量模型中国

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Mantle Cell Lymphoma in a Lacrimal Gland in a Female and a Review of the literature

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Eye Science 2014年第3期29卷 178-181页

作者： Jianhao Cai zeyi li Yuansheng Zhou Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong

Purpose:To report a rare case of Mantle cell lymphoma in lacrimal gland and review of the literature Case report:.We report a case of a 59-year-old female who presented with an upper eyelid mass in the right eye for 3months, without pain and irrigation. A computerized tomography(CT) scan showed a mass in the bilateral lacrimal gland region, more significant in right eye. The patient underwent a lacrimal gland mass excision surgery and diagnosis of mantle cell lymphoma by histopathology..Immunochemistry for CD20, CD79 a, CD5, and Cyclin D1 was positive. She was recommended to the Shantou cancer hospital for ***:.Mantle cell lymphoma is a rare type of malignant lymphoma,.over expressing CD5 and cyclin D1 antigens,which distinguishes it from other B cell lymphomas.

关键词：细胞周期素淋巴瘤泪腺复习文献女性病理组织学病例报告

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A Case of Corneoscleral Dellen after Medial Rectus Recession Combined with Pterygium Resection in Right Eye

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Eye Science 2012年第4期27卷 198-201页

作者： Shibin lin zeyi li Xingkai Zhan Jianhao Cai Joint Shantou International Eye Center

Purpose:A case of corneoscleral dellen after medial rectus recession combined with pterygium resection was reported. Methods: Case report Results:A male patient aged 48 years had ghost for 1 year after acoustic neuroma *** patient was diagnosed with rectus paresis in the right eye. He successfully underwent medial rectus recession combined with pterygium resection. A corneoscleral dellen with a size of 2 ×2 mm was observed at 20 d postoperatively. The thinnest cornea was 147 um, diagnosed as corneoscleral dellen, which was cured after undergoing corneal limbal stem cell transplantation with conjunctival flap. Conclusion:Corneoscleral dellen is noninfectious corneoscleral ulcer caused by complex *** cases recovered by using artificial tears,antibiotic ointment and eye wrap,and other patients required corneal limbal stem cell transplantation with conjunctival flap, even keratoplasty. It is recommended that the patients with strabismus combined with pterygium underwent conjunctival flap transplantation at early stage to prevent the incidence of surgical complications.

关键词：经济衰退角膜缘切除术干细胞移植肌肉后角角膜移植术

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Effect of NF-κB Inhibitor PDTC on a Herpetic Stromal Keratitis Mouse Model

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Eye Science 2012年第4期27卷 188-192页

作者： Yiqun Geng Yunliang Shao Yu Zhang zeyi li Shantou University.the Chinese University of Hong Kong Joint Shantou International Eye Center Guangdong Lab Animal Monitoring Institute

Purpose:To investigate the effect of NF-κB inhibitor PDTC on inflammation response in mice with herpetic stromal keratitis (HSK). Methods:A total of 120 female BALB/c mice,aged 4 -6 weeks, were treated by scuffing the epithelium of the right cornea with the tip of a 30G syringe needle, and approximately 1×106 PFU of HSV-1virus was seeded onto the corneal surface. The eye was then exposed to 170 mJ/cm2 of UV light 7 weeks later, in order to induce the relapse of HSK. PDTC eye drops were adjusted to various concentrations (0.1,1.0, and 10 mg/ml) with PBS; PBS only was used on control *** animals received PDTC or PBS eye drops 6 times/day,1 drop/time, for 7 consecutive days. Mice were sacrificed at 8h, and 1, 3, and 7d after administration. Corneal tissues were prepared for the detection of IL-1β, IL-4, IL-6, and IL-12 by EliSA and histological study. Results: Neutrophilic leukocytes and lymphocytes were found in the corneas of HSK mice. EliSA results showed fluctuating expressions of IL-1β, IL-4, IL-6, and IL-12. The IL-1β and IL-4 expressions were significantly lower in the high dose group than in the control group (P<0.05), while IL-6 and IL-12 expressions were significantly higher in the high dose group than in the control group (P<0.05). Conclusion:A high concentration of PDTC can suppress the expression of certain inflammatory factors in HSK mice while improving the expression of others.

关键词：小鼠模型眼角膜抑制剂 NF-KB 基质疱疹 IL-12 EliSA法

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