检索结果-内蒙古大学图书馆

Verify All Traffic: Towards Zero-Trust In-Network Intrusion Detection against Multipath Routing

IEEE Journal on Selected Areas in Communications 2025年第6期43卷 2155-2171页

作者： Zhao, Ziming Li, Zhaoxuan Xie, Xiaofei Liu, Zhipeng Li, Tingting Yu, Jiongchi Zhang, Fan Chen, Binbin School of Software Technology Zhejiang University Ningbo315100 China College of Computer Science and Technology Zhejiang University Hangzhou310027 China ZJU-Hangzhou Global Scientific and Technological Innovation Center 311200 China Key Laboratory of Blockchain and Cyberspace Governance of Zhejiang Province 310027 China Jiaxing Research Institute Zhejiang University 314000 China Zhengzhou Xinda Institute of Advanced Technology Zhengzhou450001 China Singapore State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing100093 China School of Cyber Security UCAS Beijing100049 China School of Computing and Information Systems Singapore Management University Singapore188065 Singapore Advanced Digital Sciences Center Singapore138632 Singapore Singapore University of Technology and Design SingaporeB96049 Singapore

With the popularity of encryption protocols, machine learning (ML)-based traffic analysis technologies have attracted widespread attention. To adapt to modern high-speed bandwidth, recent research is dedicated to advancing zero-trust intrusion detection by offloading feature extraction and model inference into the network dataplane. Especially, with the rise of programmable switches, achieving line-speed ML inference becomes promising. However, existing research only considers a single switch node as a relay to conduct evaluation. This is far from real-world deployments involving multiple switches (given that zero-trust security assumes that threats can originate from anywhere, including within the network), particularly the multi-path routing phenomenon that exists in practice. In this paper, we reveal practical challenges in the context of enabling line-speed model inference in the network dataplane. Furthermore, we propose FCPlane, the forwarding and computing integrated dataplane for zero-trust intrusion detection that aims to enable efficient load balancing while providing reliable traffic analysis results, even against multipath routing. The core idea is to reconcile forwarding and computation to the flowlet level, for which a tailor-made Markov chain model is designed. Based on two public traffic datasets, we evaluate seven state-of-the-art in-network traffic analysis models deployed in four types of topologies (three with multipath routing and one without) to explore performance impact and demonstrate the effectiveness of our proposal. © 1983-2012 IEEE.

关键词： Network intrusion

来源：评论

学校读者我要写书评

暂无评论

Design of High-efficiency Transmitarray with Beam Steering and Low Scattering Characteristic

引用

IEEE Transactions on Antennas and Propagation 2025年

作者： Shaozhi, Wang Zihao, Zheng Weiwei, Wu Yuhong, Ma Jingjian, Huang Qingzhan, Shi Naichang, Yuan National University of Defense Technology State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Hunan Changsha410000 China National University of Defense Technology College of Electronic Engineering Hefei230037 China

This article introduces a hybrid design method for high-efficiency absorbing Reconfigurable Transmitarray (ARTA). By cascading an absorbing layer with a 2-bit reconfigurable layer, the transmission unitcells can realize the frequency response characteristic of an Absorbing-Transmissive-Absorbing (A-T-A). Specifically, the frequencies with an absorption rate exceeding 80% are within the ranges of 3.3GHz-5.1GHz and 7.8GHz-9.4GHz, while the frequency range with transmission exceeding -3dB spans from 5.69GHz to 5.92GHz. Meanwhile, the transmission phase can be adjusted among four states: 0°, 90°, 180°, and 270°, enabling beam steering of ARTA. Compared to designs for non-reconfigurable transmissive arrays, our design methodology necessitates the satisfaction of absorbing performance under different phase states. For validation, A prototype sample, comprising a 12x12 array structured with 5 metallic layers and 4 dielectric layers, sandwiching an air layer in between, has been fabricated and tested. Measurement results demonstrated high radiation performance with a peak gain of 21.6 dB and aperture efficiency of 33.3% at 5.85 GHz. The BW-1 dB and BW-3 dB were 0.2 GHz and 0.6 GHz, respectively. ±60° 2D-scanning was achievable and when the beam is directed at 0°, the sidelobe levels in the E-plane and H-plane are -17.3 dB and -18 dB, respectively. Under normal incidence of an x-polarized wave, the -8 dB Monostatic RCS reduction bandwidths covered 32.1% (3.4-4.7 GHz) for lower band and 10% (8.5-9.4 GHz) for upper band. The ARTA by this hybrid design methodology represents an attractive solution for addressing electromagnetic compatibility issues and for low-detectability applications. © 1963-2012 IEEE.

关键词： Integrated circuit design

来源：评论

学校读者我要写书评

暂无评论

Fabrication and characterization of mullite fiber-based porous ceramics with mixed fiber lengths for high-temperature gas filtration

引用

Ceramics International 2025年

作者： Zheng, Dazhi Zhu, Ruijian Hu, Yuwen Liang, Shiou Sun, Huiying Wang, Zengmei State Key Laboratory of Engineering Materials for Major Infrastructure Jiangsu Key Lab. of Construction Materials School of Materials Science and Engineering Southeast University Nanjing211189 China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of Technology Nanjing211167 China

The emissions and particulate pollutants (PM) from industrialization and other human activities have become a significant threat to human health. Researchers have experimented with various fiber-bonded filters, but there are still relatively few products with good high-temperature resistance. In this paper, a fiber-bonded porous ceramic with high porosity was prepared by vacuum filtration combined with freeze-drying using two homemade mullite fibers with different length-to-diameter ratios as raw materials and mullite sol as binder. When the content of fine fibers is 40 %, the product has a better overall performance, its density is 0.63g/cm3, porosity is 74 %, strength is 0.77 MPa, thermal conductivity is 0.153 W m−1 K−1. When the airflow rate of 2 L/min, the pressure drop is 80 Pa, the filtration efficiency of about 99 %, the QF is 0.08 pa−1, The mullite fiber-bonded porous ceramics prepared through a simple process exhibit excellent filtration performance, offering a wide range of potential applications. © 2025

关键词： Thermal conductivity of gases

来源：评论

学校读者我要写书评

暂无评论

Fabrication of bifocal curved compound eyes for large-DOF and wide-FOV imaging via femtosecond laser 3D printing

引用

Optics Communications 2025年 585卷

作者： An, Ran Hu, Zhi-Yong Zhang, Zi-Heng Jin, Xue-Tao Liu, Xue-Qing Wang, Yan Yu, Yan-Hao Chen, Qi-Dai State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun130012 China Key Laboratory of Advanced Structural Materials of Ministry of Education Changchun University of Technology Changchun220103 China

Miniature imaging systems are pivotal in applications such as medical endoscopes, micro-robotics, virtual reality, and military reconnaissance. Nonetheless, achieving both an extended depth of field and a broad field of view in compact imaging devices remains a significant challenge. In nature, the sub-eye of trilobite compound eye exhibits a remarkable structure that focuses incoming light onto two distinct focal planes, enabling the simultaneous detection of both proximate and distant objects. Drawing inspiration from trilobite compound eye, this study introduces an innovative bioinspired design featuring a bifocal curved compound eye, offering an enhanced depth of focus and an expansive field of view. Meanwhile, the focal lengths of sub-lenses with varying orientations are meticulously designed to ensure convergence on a common imaging plane, thereby addressing the challenge of detector reception. The compound lens is manufactured through femtosecond laser 3D printing technology to achieve high-fidelity profiles that match the design. Experimental results demonstrate that the compound lens can concurrently capture images with a 90° field of view from near (10 cm) objects, without the need for mechanical zoom mechanisms. This breakthrough provides fresh perspectives for future applications in micro-vision technologies, including medical diagnostics and reconnaissance robotics. © 2025

关键词： Femtosecond lasers

来源：评论

学校读者我要写书评

暂无评论

Lensless efficient snapshot hyperspectral imaging using dynamic phase modulation

引用

Photonics Research 2025年第2期13卷 511-526页

作者： CHONG ZHANG XIANGLEI LIU LIZHI WANG SHINING MA YUANJIN ZHENG YUE LIU HUA HUANG YONGTIAN WANG WEITAO SONG Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and Photonics Beijing Institute of Technology Zhengzhou Research Institute Beijing Institute of Technology State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University School of Computer Science and Technology Beijing Institute of Technology School of Electrical and Electronic Engineering Nanyang Technological University School of Artificial Intelligence Beijing Normal University

Snapshot hyperspectral imaging based on a diffractive optical element(DOE) is increasingly featured in recent progress in deep optics. Despite remarkable advances in spatial and spectral resolutions, the limitations of current photolithography technology have prevented the fabricated DOE from being designed at ideal heights and with high diffraction efficiency, diminishing the effectiveness of coded imaging and reconstruction accuracy in some bands. Here, we propose, to our knowledge, a new lensless efficient snapshot hyperspectral imaging(LESHI)system that utilizes a liquid-crystal-on-silicon spatial light modulator(LCoS-SLM) to replace the traditionally fabricated DOE, resulting in high modulation levels and reconstruction accuracy. Beyond the single-lens imaging model, the system can leverage the switch ability of LCoS-SLM to implement distributed diffractive optics(DDO)imaging and enhance diffraction efficiency across the full visible spectrum. Using the proposed method, we develop a proof-of-concept prototype with an image resolution of 1920 × 1080 pixels, an effective spatial resolution of 41.74 μm, and a spectral resolution of 10 nm, while improving the average diffraction efficiency from 0.75 to0.91 over the visible wavelength range(400–700 nm). Additionally, LESHI allows the focal length to be adjusted from 50 mm to 100 mm without the need for additional optical components, providing a cost-effective and timesaving solution for real-time on-site debugging. LESHI is the first imaging modality, to the best of our knowledge,to use dynamic diffractive optics and snapshot hyperspectral imaging, offering a completely new approach to computational spectral imaging and deep optics.

关键词： Diffraction efficiency Diffractive optical elements Imaging systems Phase modulation Spatial light modulators Spatial resolution

来源：评论

学校读者我要写书评

暂无评论

Synergistic extraction of Li/Rb and simultaneous removal of Si from the lithium concentrate via a novel alkaline method

引用

Separation and Purification technology 2025年 370卷

作者： Yang, Hui Ma, Baozhong Shi, Shuyang Yu, Jiancheng Liu, Yubo Cao, Zhihe Wang, Chengyan State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing100083 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing100083 China

The alkali method has been proven to be an effective approach for lithium (Li) and rubidium (Rb) extraction;however, the significant dissolution of silicon (Si) remains a challenging issue. A high Si concentration in the leachate can cause filtration difficulties and pipeline blockages, while also negatively affecting phase separation during the subsequent extraction of Rb. Additionally, since the leachate needs to be recycled, the removal of Si from the leach liquor is essential. This study introduces an innovative approach of adding Al(OH)3 for Si removal during the alkali leaching of lithium concentrate. Preliminary single-factor experiments demonstrate that Al(OH)3 effectively reduces the Si concentration in leach liquor but also consumes NaOH, leading to a decline in Li and Rb leaching efficiency. Given the interaction between Al(OH)3 addition and NaOH concentration on element leaching, Response Surface Methodology was employed to predict and optimize the parameters of the leaching process. Under the optimal parameters of 290 g/L NaOH concentration, 39 % Al(OH)3 addition, and 120 °C leaching temperature, the experimental leaching efficiencies of Li, Rb, and Si were 99.8 %, 87.9 %, and 4.1 %, respectively. Subsequently, Rb was separated with Li via solvent extraction under high alkaline conditions. The single-stage extraction efficiency of Rb was 82.8 % at optimized conditions, and after four-stage countercurrent extraction, the overall Rb recovery could reach 99.2 %. The innovative alkali method proposed not only enables the synergistic extraction and separation of Li and Rb but also achieves effective Si removal and its utilization. © 2025 Elsevier B.V.

关键词： Solvent extraction

来源：评论

学校读者我要写书评

暂无评论

Mitigating polarization effects in lithium-ion battery capacitors through conductive network enhancement

引用

Journal of Energy Storage 2025年 127卷

作者： Guo, Zhang Liu, Zhien An, Yabin Lu, Chihua Li, Chen Xu, Yanan Xie, Liping Sun, Xianzhong Zhang, Xiong Wang, Kai Ma, Yanwei Institute of Electrical Engineering Chinese Academy of Sciences Beijing100190 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528200 China University of Chinese Academy of Sciences Beijing100049 China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan250013 China College of Mechanical Engineering & Automation Fuzhou University Fuzhou350108 China

Lithium-ion battery capacitor (LIBC), which combines battery material and capacitor material in the cathode, has attracted attention for bridging the gap between high energy density and high power density in energy storage devices, but its application is hindered by polarization phenomena. To address this problem, an enhanced cathode conductive network is established by optimizing the conductive agent content and introducing conductive additives, which can improve the electronic and ionic conductivity. Cathode half-cell with enhanced conductive network, utilizing LiNi1/3Co1/3Mn1/3O2 and activated carbon as active materials, carbon black (CB) and vapor grown carbon fiber (VGCF) as conductive agents, indicates excellent capacity, rate capability, and cycle performance. And it shows low polarization with the voltage differences between the redox peaks of 91 mV at 0.1 mV s−1 in cyclic voltammetry experiments, nearly 26 % smaller than that for a half-cell with only 5 % CB as the conductive agent. Additionally, the complex polarization dynamics are revealed by distribution of relaxation times technique for extracting time scale information and a mathematical model based on the pseudo-two-dimensions theory. Consequently, a full-cell with a pre-lithiated soft carbon anode is assembled, displaying a great device performance of 300.3 Wh kg−1 and 15.7 kW kg−1. After 7500 cycles at 500 mA g−1, the capacity retention of the device can reach 81.1 % and the energy efficiency is 92.4 %. This study contributes to a better understanding of the polarization phenomenon of LIBCs. © 2025 Elsevier Ltd

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Rodent enamel-inspired hydroxyapatite nanocomposites with Fe 3+ -rich amorphous intergranular phases

引用

Journal of Materials Research and technology 2025年 36卷 7423-7432页

作者： Shenye Chen Zhengjian Su Bingyu Xue Benxi Xu Yafei Cheng Kun Wang Yidi Li Zhengyi Fu Hubei Longzhong Laboratory Xiangyang 441000 PR China School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 PR China State Key Laboratory of Precision Blasting Jianghan University Wuhan 430056 PR China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 PR China

Rodent enamel is primarily composed of hydroxyapatite (HAP) nanowires and Fe 3+ -rich amorphous intergranular phases (AIP). Inspired by rodent tooth enamel, this study successfully formed a layer of Fe 3+ -rich AIP on the outer layer of HAP nanowires by ion exchange between Fe 3+ and Ca 2+ within the HAP lattice. The thermal stability of Fe-HAP nanowires with Fe 3+ -rich AIP was enhanced. By bi-directional freezing of Fe-HAP nanowires with polyvinyl alcohol (PVA), rodent enamel-like nanocomposites (Fe-HEN) were obtained. Owing to the reinforcing and toughening effect of Fe 3+ -rich AIP, Fe-HEN exhibited a hardness of 1.66 ± 0.23 GPa, a Young's modulus of 48.8 ± 6.7 GPa in the longitudinal direction, as well as a hardness of 1.38 ± 0.16 GPa and a Young's modulus of 40.2 ± 3.0 GPa in the transversal direction. The flexural strength of the sample reached 153.5 ± 5.0 MPa, which is 2.9 times higher than that of samples without AIP, surpassing the performance of natural rodent enamel. The compressive strength reached 205 ± 4.3 MPa, representing a 1.5-fold increase over the sample without AIP and comparable to that of natural enamel. Compared to samples without AIP, Fe-HEN exhibits superior fracture toughness and crack deflection, better corrosion resistance, owing to the reinforcing effect of Fe 3+ -rich AIP at nanowire interfaces. This study demonstrates the incorporation of amorphous reinforced structures into the tooth enamel-like materials via ion exchange, offering a promising strategy for the development of high-performance multiscale composites.

关键词： Hydroxyapatite nanowires Amorphous intergranular phases Enamel-like nanocomposites Ion exchange Rodent enamel-inspired

来源：评论

学校读者我要写书评

暂无评论

Significantly enhanced energy storage performance of BaTiO3-based amorphous thin films through the synergistic function of variable valence ions

引用

Ceramics International 2025年

作者： Yao, Yiming Tao, Cheng Huang, Rui Zhang, Jian Zhang, Tianyu Hao, Hua Yao, Zhonghua Liu, Hanxing Cao, Minghe State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Amorphous thin films have been widely studied due to the excellent breakdown strength in recent years. However, their practical application faces significant challenges primarily caused by low polarization and energy density. Herein, we propose a multi-variable valence ions doping strategy to enhance the energy storage performance of BaTiO3-based amorphous thin films. The Ba0.92Bi0.08Ti1-x(Ni0.5Mn0.5)xO3(BBTNM) amorphous thin films were fabricated by chemical solution deposition method. In addition, the synergistic effects of variable valence ions (Ni, Mn) on the microstructure, dielectric and energy storage properties of the films were systematically studied. Compared with the undoped Ba0.92Bi0.08TiO3(BBT) film, the polarization and energy storage performance of the BBTNM film have been significantly improved owing to the defect dipoles generated by the incorporation of variable valence ions. Notably, a high discharge energy density of 93.3 J/cm3 together with an energy efficiency of 83 % could be achieved in the x = 0.08 film at 7.05 MV/cm. Simultaneously, the film exhibits excellent thermal stability within the range of 20 °C–160 °C, and still maintains favorable performance after 105 cycles. Overall, this work introduces a new approach for designing BaTiO3-based thin film materials. © 2025

关键词： Amorphous films

来源：评论

学校读者我要写书评

暂无评论

Composite dispersants for the preparation of monodisperse spherical alumina with uniform particle size

引用

Ceramics International 2025年

作者： Ren, Junbo Huo, Mingda Liu, Pengbo Tan, Ying Li, Minghui Gao, Wei Sun, Xiaohong Guo, Ruisong Zhao, Xinqi School of Materials Science and Engineering State Key Laboratory of Precious Metal Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin300072 China CMP Advanced Materials Co. Ltd Tianjin300459 China

Spherical α-alumina powder has been widely used in advanced alumina ceramics manufacturing due to its excellent sphericity, uniform particle size distribution and good dispersion. However, the small size and fast growth rate of α-alumina precursor particles lead to strong agglomeration during grain growth, making it difficult to obtain uniformly dispersed α-alumina particles with good sphericity. In this study, polyethylene glycol 2000 (PEG2000) and poly (ammonium acrylate) (PAA-NH4) were used as composite dispersants to decrease agglomeration during the preparation of alumina precursors. When the contents of PEG2000 and PAA-NH4 were 0.5 g L−1 and 0.06 g L−1 (S4), respectively, uniformly dispersed alumina precursor particles with good sphericity and a particle size of about 506 nm were obtained, and the morphology remained stable after calcination. After molding and sintering the calcined powders, alumina ceramics with superior mechanical properties were produced. Compared to commercial α-alumina ceramics, flexural strength is increased by approximately 28.9 %, while fracture toughness is increased by approximately 29.2 %. This study offers a new foundation for the development of high-performance alumina powders and ceramics, supporting their engineering applications. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Calcination

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：