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Frontiers of Environmental science & Engineering 2024年第5期18卷 127-136页

作者： Hao Zhang Huinan li pengyi Zhang Tingxia Hu xianjie wang State Key Joint Laboratory of Environment Simulation and pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Beijing Key Laboratory for Indoor Air Quality Evaluation and Control Beijing100084China Midea Corporate research Center Foshan528311China

Copper intercalated birnessite MnO_(2)(δ-MnO_(2))with weak crystallinity and high specific surface area(421 m^(2)/g)was synthesized by a one-pot redox method and investigated for low-temperature CO *** molar ratio of Cu/Mn was as high as 0.37,which greatly weakened the Mn-O bond and created a lot of low-temperature active oxygen *** situ DrIFTS revealed strong bonding of copper ions with ***-synthesized MnO_(2)-150Cu achieved 100%conversion of 250 ppm CO in normal air(3.1 ppm H_(2)O)even at−10°C under the weight-hourly space velocity(WHSV)of 150 L/(g·h).In addition,it showed high oxygen storage capacity to oxidize CO in inert *** the concurrent moisture in air significantly inhibited CO adsorption and its conversion at ambient temperature,MnO_(2)-150Cu could stably convert CO in 1.3%moisture air at 70°C owing to its great low-temperature activity and reduced competitive adsorption of water with increased *** study discovers the excellent low-temperature activity of weakly crystallized δ-MnO_(2) induced by high content intercalated copper ions.

关键词： CO oxidation Birnessite Interlayer copper Low-temperature Oxygen storage capacity

A review:principles and Applications of High-pressure In Situ Time-resolved Transient Absorption Spectroscopy

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Ultrafast science 2024年第2期4卷 45-59页

作者： Xiaxia qin Guozhao Zhang lin Chen qinglin wang Guangyu wang Haiwa Zhang Yinwei li Cailong liu school of physics science and information Technology Liaocheng UniversityLiaocheng 252059China Laboratory of Quantum Functional Materials Design and Application of physics and Electronic Engineering Jiangsu Normal UniversityXuzhou 22116China

Time-resolved transient absorption(TA)spectroscopy measurement technology provides detailed information into the ultrafast dynamics by tracking the transitions and deactivation processes of the excited-state carriers,which holds vast potential for investigating processes related to the luminescence and nonradiative recombination of *** is considered a potent tool for tuning the carrier dynamic *** combination of high-pressure experimental technology and time-resolved TA spectroscopy measurement technology enables researchers to reveal the inherent relation between the structure and optical properties of materials,which is crucial for optimizing material performance and applications in the field of *** this review,the principles and the theoretical foundations of high-pressure time-resolved TA spectroscopy measurement technology will be introduced,and the research advancements in ultrafast dynamics processes of materials under high pressure will be summarized and *** addition,we will expound on the future prospects of time-resolved TA spectroscopy measurement technology to detect the ultrafast dynamic behaviors of materials and complexes under the coregulation of temperature and pressure.

关键词： materials. resolved holds

resNeSt-biGrU: An Intrusion Detection Model Based on Internet of Things

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Computers, Materials & Continua 2024年第4期79卷 1005-1023页

作者： Yan Xiang Daofeng li Xinyi meng Chengfeng Dong Guanglin qin school of Computer and Electronics information Guangxi UniversityNanning530004China Guangxi Colleges and Universities Key Laboratory of Multimedia Communications and information processing Guangxi UniversityNanning530004China

The rapid expansion of Internet of Things (IoT) devices across various sectors is driven by steadily increasingdemands for interconnected and smart technologies. Nevertheless, the surge in the number of IoT device hascaught the attention of cyber hackers, as it provides them with expanded avenues to access valuable data. Thishas resulted in a myriad of security challenges, including information leakage, malware propagation, and financialloss, among others. Consequently, developing an intrusion detection system to identify both active and potentialintrusion traffic in IoT networks is of paramount importance. In this paper, we propose resNeSt-biGrU, a practicalintrusion detection model that combines the strengths of resNeSt, a variant of residual Neural Network, andbidirectionalGated recurrentUnitNetwork (biGrU).Our resNeSt-biGrUframework diverges fromconventionalintrusion detection systems (IDS) by employing this dual-layeredmechanism that exploits the temporal continuityand spatial feature within network data streams, a methodological innovation that enhances detection *** conjunction with this, we introduce the preIoT dataset, a compilation of prevalent IoT network behaviors, totrain and evaluate IDSmodels with a focus on identifying potential intrusion traffics. The effectiveness of proposedscheme is demonstrated through testing, wherein it achieved an average accuracy of 99.90% on theN-BaIoT datasetas well as on the preIoT dataset and 94.45% on UNSW-NB15 dataset. The outcomes of this research reveal thepotential of resNeSt-biGrU to bolster security measures, diminish intrusion-related vulnerabilities, and preservethe overall security of IoT ecosystems.

关键词： Internet of Things cyberattack intrusion detection internet security

A regularization algorithm of dynamic light scattering for estimating the particle size distribution of dual-substance mixture in water

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particuology 2024年第6期89卷 246-257页

作者： Yanghong wang Ziqiang meng Zipei Zhang Min Xia li Xia Wei li school of Optical and Electronic information Huazhong University of Science and TechnologyWuhan 430074China

Dynamic light scattering(DLS)is a nondestructive,well-established technique for the size characterization of proteins,nanoparticles,polymers,and colloidal ***,current DLS techniques are only applied to particle groups of single composition due to the limitation of their inversion *** this study,we propose a particle size distribution inversion algorithm based on the Tikhnonov regularization method that can be applied to the dual-substance particle *** algorithm retrieves the particle size distributions of two substances,respectively,by taking advantage of their refractive index *** simulation results reveal that the algorithm has excellent accuracy and stability when the scattering angle is 30°.Instead of the original identity matrix,the first-order difference matrix and second-order difference matrix are used as the regular matrix when utilizing the Tikhnonov algorithm,which obviously improves the anti-interference,accuracy,and stability of the ***,the inversion of particle size distribution is carried out at a 0.01%–1%noise level,which shows that the algorithm has an available antinoise ***,experimental particle size measurements for a mixture of polystyrene beads and toner particles demonstrate that the proposed algorithm is superior to the traditional Tikhnonov algorithm in applicability and accuracy.

关键词： Dynamic light scattering Dual-substance mixture particle sized istribution Tikhnonov regularization

Monitoring absolute vertical land motions and absolute sea-level changes from GpS and tide gauges data over French polynesia

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Geodesy and Geodynamics 2024年第1期15卷 13-26页

作者： xianjie li Jean-pierre Barriot Bernard Ducarme Marania Hopuare Yidong Lou Geodesy Observatory of Tahiti University of French PolynesiaFaa'a 98702French Polynesia Catholic university of Louvain Georges Lemaître Centre for Earth and Climate Research(ELI)1348 Louvain-la-NeuveBelgium GNSS research Center Wuhan UniversityWuhan 430079China State Key Laboratory of information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China

In this study,we estimate the absolute vertical land motions at three tidal stations with collocated Global Navigation Satellite System(GNSS)receivers over French polynesia during the period 2007-2020,and obtain,as ancillary results,estimates of the absolute changes in sea level at the same *** verify our processing approach to determining vertical motion,we first modeled vertical motion at the International GNSS Service(IGS)THTI station located in the capital island of Tahiti and compared our estimate with previous independent determinations,with a good *** obtained the following estimates for the vertical land motions at the tide gauges:Tubuai island,Austral Archipelago-0.92±0.17 mm/yr,Vairao village,Tahiti Iti:-0.49±0.39 mm/yr,rikitea,Gambier Archipelago-0.43±0.17 mm/*** absolute variations of the sea level are:Tubuai island,Austral Archipelago 5.25±0.60 mm/yr,Vairao village,Tahiti Iti:3.62±0.52 mm/yr,rikitea,Gambier Archipelago 1.52±0.23 mm/*** discuss these absolute values in light of the values obtained from altimetric measurements and other means in French polynesia.

关键词： GpS Tide gauges Sea level changes Vertical land motion

Quantum dot-enabled infrared hyperspectral imaging with single-pixel detection

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light(science & Applications) 2024年第6期13卷 1112-1121页

作者： Heyan meng Yuan Gao Xuhong wang Xianye li lili wang Xian Zhao Baoqing Sun school of information sciences and Engineering Shandong UniversityQingdaoChina Center for Optics research and Engineering(COrE) Key Laboratory of Laser&Infrared System(Shandong University)Ministry of EducationShandong UniversityQingdaoChina school of Mechanical Electrical and Information EngineeringShandong UniversityWeihaiChina

Near-infrared(NIr)hyperspectral imaging is a powerful technique that enables the capture of three-dimensional(3D)spectra-spatial information within the NIr spectral range,offering a wide array of ***,the high cost associated with InGaAs focal plane array(FpA)has impeded the widespread adoption of NIr hyperspectral *** this challenge,in this study,we adopt an alternative approach—single-pixel detection for NIr hyperspectral *** investigation reveals that single-pixel detection outperforms conventional FpA,delivering a superior signal-to-noise ratio(SNr)for both spectral and imaging *** implement this strategy,we leverage self-assembled colloidal quantum dots(CQDs)and a digital micromirror device(DMD)for NIr spectral and spatial information multiplexing,complemented by single-pixel detection for simultaneous spectral and image *** experimental results demonstrate successful NIr hyperspectral imaging with a detection window about 600 nm and an average spectral resolution of 8.6 nm with a pixel resolution of 128×*** resulting spectral and spatial data align well with reference instruments,which validates the effectiveness of our *** circumventing the need for expensive and bulky FpA and wavelength selection components,our solution shows promise in advancing affordable and accessible NIr hyperspectral imaging technologies,thereby expanding the range of potential applications.

关键词： spectral Quantum mirror

Characteristics of transfer zones under the influence of preexisting faults and regional stress transformation:Wenchang A subsag,Zhujiang river Mouth Basin,northern South china Sea

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Journal of Oceanology and limnology 2024年第3期42卷 744-759页

作者： Wei li Mingyue CAO Meifang meng Caiwei FAN Hui li Jia li Wanqiu WU ruiqing qin Xingan li Yiming liU State Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China school of Geosciences China University of Petroleum(East China)Qingdao 266580China Zhanjiang Branch China National Offshore Oil Corporation CompanyZhanjiang 524057China

A transfer zone in rift basins preserves important information on regional tectonic evolution and plays significant roles in hydrocarbon *** on the systematic analysis of 3D seismic data and hydrocarbon accumulation conditions,the geometry,kinematics,and reservoir control of a large synthetic overlapping transfer zone in the south of the Wenchang A subsag in the Zhujiang(pearl)river Mouth basin were *** indicate that the development and evolution of the transfer zone was controlled by the interaction between pre-existing faults and regional stress *** intense rifting of the main faults of the transfer zone controlled the development of source rocks and faultcontrolled slope break *** strike-slip overprint since the Oligocene is conducive to the formation of a large-scale fault-anticline trap,and the secondary faults in the transfer zone contribute to the hydrocarbon *** conjugate intersection area of the NE-and NW-trending faults offers more opportunity for hydrocarbon migration and accumulation.

关键词： transfer zone pre-existing fault regional stress transformation Cenozoic Wenchang A Subsag Zhujiang(pearl)river Mouth Basin

predicting Users’ Latent Suicidal risk in Social Media: An Ensemble Model Based on Social Network relationships

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Computers, Materials & Continua 2024年第6期79卷 4259-4281页

作者： Xiuyang meng Chunling wang Jingran Yang Mairui li Yue Zhang Luo wang school of information science and Technology Beijing Forestry UniversityBeijing100083China Engineering research Center for Forestry-Oriented Intelligent information processing of National Forestry and Grassland Administration Beijing100083China

Suicide has become a critical concern,necessitating the development of effective preventative *** media platforms offer a valuable resource for identifying signs of suicidal *** progress in detecting suicidal ideation on social media,accurately identifying individuals who express suicidal thoughts less openly or infrequently poses a significant *** tackle this,we have developed a dataset focused on Chinese suicide narratives from Weibo’s Tree Hole feature and introduced an ensemble model named Text Convolutional Neural Network based on Social Network relationships(TCNN-SN).This model enhances predictive performance by leveraging social network relationship features and applying correction factors within a weighted linear fusion *** is specifically designed to identify key individuals who can help uncover hidden suicidal users and *** model,assessed using the bespoke dataset and benchmarked against alternative classification approaches,demonstrates superior accuracy,F1-score and AUC metrics,achieving 88.57%,88.75%and 94.25%,respectively,outperforming traditional TextCNN models by 12.18%,10.84%and 10.85%.We assert that our methodology offers a significant advancement in the predictive identification of individuals at risk,thereby contributing to the prevention and reduction of suicide incidences.

关键词： Suicide risk prediction social media social network relationships Weibo Tree Hole deep learning

All-dielectric terahertz metasurface governed by bound states in the continuum with high-Q factor

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The Journal of china Universities of posts and Telecommunications 2024年第2期31卷 44-54页

作者： li Kun Zhao Xu wang meng Jia Xingning Zhao ruiqi Lu Guizhen school of Integrated Circuit science and Engineering Tianjin University of TechnologyTianjin 300384China school of Electronic and Electrical Engineering Ningxia UniversityYinchuan 750021China QILU Aerospace information research Institute Chinese Academy of Sciences(CAS)Jinan 250101China State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing 100024China

The method of terahertz(THz)resonance with a high-quality(high-Q)factor offers a vital physical mechanism for metasurface sensors and other high-Q factor ***,it is challenging to excite the resonance with a high-Q factor in metasurfaces with proper sensitivity as well as figure of merit(FOM)***,an all-dielectric metasurface composed of two asymmetrical rectangular blocks is *** and silicon are the materials applied for the substrate and cuboids *** distinct resonance governed by bound states in the continuum(BIC)is excited by forming an asymmetric cluster by a novel hybrid method of cutting and moving the *** investigation focuses on analyzing the transmission spectra of the metasurface under different variations in structural parameters and the loss of silicon refractive *** the proposed defective metasurface serves as a transmittance sensor,it shows a Q factor of 1.08×10^(4)and achieves an FOM up to 4.8×10^(6),which is obtained under the asymmetric parameter equalling 1μ***,the proposed defective metasurface is sensitive to small changes in refractive *** the thickness of the analyte is 180μm,the sensitivity reaches a maximum value of 578 GHz/***,the proposed defective metasurface exhibits an extensive number of possible applications in the filters,biomedical diagnosis,security screening,and so on.

关键词： terahertz(THz)metasurface high-quality(high-Q)factor bound states in the continuum figure of merit(FOM)