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Detection and defending the XSS attack using novel hybrid stacking ensemble learning-based DNN approach

Digital Communications and Networks 2024年第3期10卷 716-727页

作者： Muralitharan Krishnan Yongdo lim Seethalakshmi Perumal Gayathri Palanisamy IMS Sungkyunkwan UniversitySuwon16419South Korea Department of Mathematics Sungkyunkwan UniversitySuwon16419South Korea Department of Information Technology Madras Institute of TechnologyChennaiIndia Department of Mathematics PSG College of Arts and ScienceTamilnaduIndia

Existing web-based security applications have failed in many situations due to the great intelligence of *** web applications,Cross-Site Scripting(XSS)is one of the dangerous assaults experienced while modifying an organization's or user's *** avoid these security challenges,this article proposes a novel,all-encompassing combination of machine learning(NB,SVM,k-NN)and deep learning(RNN,CNN,LSTM)frameworks for detecting and defending against XSS attacks with high accuracy and *** on the representation,a novel idea for merging stacking ensemble with web applications,termed“hybrid stacking”,is *** order to implement the aforementioned methods,four distinct datasets,each of which contains both safe and unsafe content,are *** hybrid detection method can adaptively identify the attacks from the URL,and the defense mechanism inherits the advantages of URL encoding with dictionary-based mapping to improve prediction accuracy,accelerate the training process,and effectively remove the unsafe JScript/JavaScript keywords from the *** simulation results show that the proposed hybrid model is more efficient than the existing detection *** produces more than 99.5%accurate XSS attack classification results(accuracy,precision,recall,f1_score,and Receiver Operating Characteristic(ROC))and is highly resistant to XSS *** order to ensure the security of the server's information,the proposed hybrid approach is demonstrated in a real-time environment.

关键词： Machine learning Deep neural networks Classification Stacking ensemble XSS attack URL encoding JScript/JavaScript Web security

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Measurement of transient thickness between the body and graze layers of ancient porcelains using microprobe EDXRF technique

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Nuclear Science and Techniques 2004年第6期15卷 348-351页

作者： PENGZi-Cheng LEUNGPL CHENGPK lim DepartmentofPhysicsandMaterialSciences ChineseCivilisationCenter CityUniversityofHongKongKowloonHongKongChina SchoolofEarthandSpaceScience UniversityofScienceandTechnologyofChinaHefei230026／／KeyLaboratoryofLoessandQuaternaryGeologyInstituteofEarthEnvironmentCASXi＇an710054

The oxide contents of TiO2, MnO, SrO and Fe2O3 in the body and graze layers of the Jiao-Tan-Xia (JTX) and Lao-Hu-Dong (LHD) porcelains in Southern Song Dynasty (1127-1279 A.D.) have been determined using an In- ternational Eagle-II μ-probe EDXRF spectrometer. The results show that the contents in the body are much different from those in the graze one. Therefore, the transient thickness (TT) between the body and graze layers can be meas- ured through determination of a distance of the drift change in the chemical contents. The TT average for the JTX porcelains is 161μm, while that for the LHD porcelains is 258μm, which are consistent with a range of 0.15-0.3mm in the Ru-Yao porcelains. The different TT is related to the variances in firing temperature and raw material for manu- facturing the respective porcelains.

关键词：南宋瓷器 EDXRF微探针微观结构化学成分 X-射线荧光

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Can two-dimensional graphdiyne-based materials be novel materials for perovskite solar cell applications?

Materials Futures

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Materials Futures 2023年第2期2卷 142-151页

作者： Eng Liang lim Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021People’s Republic of China

Two-dimensional(2D)graphdiyne(GDY)-based materials have attracted attention in the solar cell research community owing to their unique physicochemical properties and hydrophobic nature which can serve as moisture resistance from the surrounding *** from these,the performance and stability ofperovskite solar cells(PSCs)can be greatly improved via the addition of 2D GDY-based *** mini-review summarizes the recent development of 2D GDY-based materials for PSC *** roles of 2D GDY-based materials,such as hole transporting material,electron transporting material,dopant material in perovskite film and interfacial layer,are discussed in ***,we provide future perspectives in this field,aiming to help further progress efficient and stable 2D GDY-based materials in PSCs.

关键词： two-dimensional material graphdiyne perovskite solar cells power conversion efficiency stability

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Nonlinear vibrations of nano-beams accounting for nonlocal effect using a multiple scale method

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Science China(Technological Sciences) 2009年第3期52卷 617-621页

作者： C. W. lim Department of Building and Construction City University of Hong Kong

The nonlinear free transverse vibrations of a nano-beam on simple supports are investigated based on nonlocal elasticity theory. The governing equation is proposed by considering geometric nonlinearity due to finite stretching of the beam. The method of multiple scales is applied to the governing equa- tion to evaluate the nonlinear natural frequencies. Numerical examples are presented to demonstrate the analytical results and highlight the contributions of the nonlinear term and nonlocal effect.

关键词： nonlocal elasticity theory nanobeam natural frequency method of multiple scales

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Discreteness of Flux Groups

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Acta Mathematica Sinica,English Series 2006年第1期22卷 115-122页

作者： Yong Seung CHO Myung Im lim Department of Mathematics Ewha Women's-University Seoul 120-750 Korea

Let （M, ω） be a closed symplectic 2n-dimensional manifold. Donaldson in his paper showed that there exist 2m-dimensional symplectie submanifolds （V^2m,ω） of （M,ω）, 1 ≤m ≤ n - 1, with （m - 1）-equivalent inclusions. On the basis of this fact we obtain isomorphic relations between kernel of Lefschetz map of M and kernels of Lefschetz maps of Donaldson submanifolds V^2m, 2 ≤ m ≤ n - 1. Then, using this relation, we show that the flux group of M is discrete if the action of π1 （M） on π2（M） is trivial and there exists a retraction r ： M→ V, where V is a 4-dimensional Donaldson submanifold. And, in the symplectically aspherical case, we investigate the flux groups of the manifolds.

关键词： Symplectic diffeomorphisms Flux Symplectically aspherical manifold Donaldson submanifold

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A review of understanding electrocatalytic reactions in energy conversion and energy storage systems via scanning electrochemical microscopy

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Journal of Energy Chemistry 2024年第4期91卷 155-177页

作者： Jihye Park Jong Hwan lim Jin-Hyuk Kang Jiheon lim Ho Won Jang Hosun Shin Sun Hwa Park Interdisciplinary Materials Measurement Institute Korea Research Institute of Standards and ScienceDaejeon 34113Republic of Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Applied Measurement Science University of Science and TechnologyDaejeon 34113Republic of Korea

To address climate change and promote environmental sustainability,electrochemical energy conversion and storage systems emerge as promising alternative to fossil fuels,catering to the escalating demand for *** optimal energy efficiency and cost competitiveness in these systems requires the strategic design of electrocatalysts,coupled with a thorough comprehension of the underlying mechanisms and degradation behavior occurring during the electrocatalysis *** electrochemical microscopy(SECM),an analytical technique for studying surface electrochemically,stands out as a powerful tool offering electrochemical *** possesses remarkable spatiotemporal resolution,enabling the visualization of the localized electrochemical activity and surface *** review compiles crucial research findings and recent breakthroughs in electrocatalytic processes utilizing the SECM methodology,specifically focusing on applications in electrolysis,fuel cells,and metal–oxygen batteries within the realm of energy conversion and storage *** with an overview of each energy system,the review introduces the fundamental principles of SECM,and aiming to provide new perspectives and broadening the scope of applied research by describing the major research categories within SECM.

关键词： Scanning electrochemical microscopy Electrocatalyst Electrocatalysis Water splitting Fuel cell Metal-oxygen battery

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LEUNIG_HOMOLOG and LEUNIG Regulate Seed Mucilage Extrusion in Arabidopsis

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Journal of Integrative Plant Biology 2011年第5期53卷 399-408页

作者： Minh Bui Nathan lim Paja Sijacic Department of Cell Biology and Molecular Genetics University of MarylandCollege ParkMaryland 20742USA

LEUNIG （LUG） and LEUNIG_HOMOLOG （LUH） encode two closely related Arabidopsis proteins, belonging to the Gro/TLE family of transcriptional co-repressors. These two genes were previously shown to exhibit partially overlapping functions in embryo and flower development. In this report, the role of both LUH and LUG on seed mucilage extrusion was examined. Seed mucilage extrusion occurs after the seeds are imbibed, serving as functional aid in seed hydration, germination, and dispersal. While luh-1 mutants exhibited strong defects in seed mucilage extrusion, lug-3 mutants exhibited a minor phenotype in mucilage extrusion. Further characterization indicates that luh-1 does not exhibit any obvious defect in seed epidermal cell differentiation, mucilage synthesis, or mucilage deposition, suggesting a specific role of LUH in mucilage extrusion. This seed mucilage phenotype of luh-1 is identical to that of mucilage modified 2 （mum2） mutants. MUM2 encodes a β-galactosidase required for the modification of the mucilage. Quantitative reverse transcription polymerase chain reaction of RNA extracted from siliques detected a slight decrease of MUM2 mRNA in the luh-1 mutant compared to the wild type. Together, LUH and possibly LUG may specifically regulate mucilage extrusion by promoting the expression of genes required for mucilage maturation.

关键词： Genes Extrusion Mucilages Adhesives Transcription Exhibitions Lymphocytes Defects Phenotypes Dispersants

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GFAP promoter directs lacZ expression specifically in a rat hepatic stellate cell line

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World Journal of Gastroenterology 2006年第5期12卷 723-730页

作者： Gunter Maubach Michelle Chin Chia lim Institute of Bioengineering and Nanotechnology 31 Biopolis WayThe Nanos#04-01138669Singapore.

AIM： The GFAP was traditionally considered to be a biomarker for neural gila （mainly astrocytes and nonmyelinating Schwann cells）. Genetically, a 2.2-kb human GFAP promoter has been successfully used to target astrocytes in vitro and in vivo. More recently, GFAP was also established as one of the several makers for identifying hepatic stellate cells （HSC）. In this project, possible application of the same 2.2-kb human GFAP promoter for targeting HSC was investigated. METHODS： The GFAP-lacZ transgene was transfected into various cell lines （HSC, hepatocyte, and other nonHSC cell types）. The transgene expression specificity was determined by X-gal staining of the β-galactosidase activity. And the responsiveness of the transgene was tested with a typical pro-fibrotic cytokine TGF-β1. The expression of endogenous GFAP gene was assessed by real-time RT-PCR, providing a reference for the transgene expression. RESULTS： The results demonstrated for the first time that the 2.2 kb hGFAP promoter was not only capable of directing HSC-specific expression, but also responding to a known pro-fibrogenic cytokine TGF-β1 by upregulation in a doseand time-dependent manner, similar to the endogenous GFAP. CONCLUSION： In conclusion, these findings suggested novel utilities for using the GFAP promoter to specifically manipulate HSC for therapeutic purpose.

关键词： Promoter Regions (Genetics) Animals Base Sequence Cell Line DNA, Recombinant Gene Expression Glial Fibrillary Acidic Protein Hepatocytes Humans Lac Operon RNA, Messenger Rats Transfection Transforming Growth Factor beta Transforming Growth Factor beta1

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Diurnal Variation of Tropical Convection during TOGA COARE IOP

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Advances in Atmospheric Sciences 2005年第5期22卷 685-702页

作者： Jae-Young BYON Gyu-Ho lim School of Earth and Environmental Sciences Seoul National University Seoul South KoreaSchool of Earth and Environmental Sciences Seoul National University Seoul South Korea

Diurnal variation of tropical convection and kinematic and thermodynamic conditions was investigated for different large-scale environments of the convectively active and inactive periods by using satellite observations and surface measurements during the Intensive Observation Period （IOP） of the Tropical Ocean Global Atmosphere/Coupled Ocean-Atmosphere Response Experiment （TOGA/COARE）. During the convectively active period, the features of nocturnal convection appear in vertical profiles of convergence, vertical velocity, heat source, and moisture sink. The specific humidity increases remarkably in the middle troposphere at dawn. On the other hand, the altitude of maximum convergence and that of the upward motion is lower during the convectively inactive period. The specific humidity peaks in the lower troposphere in the daytime and decreases in the middle troposphere. Spectral analyses of the time series of the infrared （IR） brightness temperature （TBB） and amounts of rainfall suggest multiscale temporal variation with a prominent diurnal cycle over land and oceanic regions such as the Intensive Flux Array （IFA） and the South Pacific Convergence Zone （SPCZ）. Over land, the daily maximum of deep convection associated with cloud top temperature less than 208 K appears at midnight due to the daytime radiative heating and the sea-land breeze. Over the ocean, convection usually tends to occur at dawn for the convectively active period while in the afternoon during the inactive period. Comparing the diurnal variation of convection with large-scale variables, the authors inferred that moisture in the middle troposphere contributes mostly to the development of nocturnal convection over the ocean during the convectively active period.

关键词： diurnal variation tropical convection rainfall large-scale environment

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IPDDF:an improved precision dense descriptor based flow estimation

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CAAI Transactions on Intelligence Technology 2020年第1期5卷 49-54页

作者： Weiyong Eng Voonchet Koo Tiensze lim Faculty of Engineering and Technology Multimedia UniversityJalan Ayer Keroh Lama75450 MelakaMalaysia

Large displacement optical flow algorithms are generally categorised into descriptor-based matching and pixel-based ***-based approaches are robust to geometric variation,however they have inherent localisation precision limitation due to histogram *** work presents a novel method called improved precision dense descriptor flow(IPDDF).The authors introduce an additional pixel-based matching cost within an existing dense Daisy descriptor framework to improve the flow estimation ***-based features such as pixel colour and gradient are computed on top of the original descriptor in the authors’matching cost *** pixel-based cost only requires a light-weight pre-computation and can be adapted seamlessly into the matching cost *** framework is built based on the Daisy Filter Flow *** the framework,Daisy descriptor and a filter-based efficient flow inference technique,as well as a randomised fast patch match search algorithm,are *** the novel matching cost formulation,the framework enables efficiently solving dense correspondence field estimation in a high-dimensional search space,which includes scale and *** on various challenging image pairs demonstrate the proposed algorithm enhances flow estimation accuracy as well as generate a spatially coherent yet edge-aware flow field result efficiently.

关键词： estimation flow matching

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