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A Stacking-Based Deep Neural Network Approach for Effective Network Anomaly Detection

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Computers, Materials & Continua 2021年第2期66卷 2217-2227页

作者： lewis Nkenyereye Bayu Adhi Tama Sunghoon Lim Department of Computer and Information Security Sejong UniversitySeoul05006Korea Data Science Group Institute for Basic Science(IBS)Daejeon34126Korea Department of Industrial Engineering Ulsan National Institute of Science and TechnologyUlsan44919Korea

An anomaly-based intrusion detection system(A-IDS)provides a critical aspect in a modern computing infrastructure since new types of attacks can be *** prevalently utilizes several machine learning algorithms(ML)for detecting and classifying network *** date,lots of algorithms have been proposed to improve the detection performance of A-IDS,either using individual or ensemble *** particular,ensemble learners have shown remarkable performance over individual learners in many applications,including in cybersecurity ***,most existing works still suffer from unsatisfactory results due to improper ensemble *** aim of this study is to emphasize the effectiveness of stacking ensemble-based model for A-IDS,where deep learning(e.g.,deep neural network[DNN])is used as base learner *** effectiveness of the proposed model and base DNN model are benchmarked empirically in terms of several performance metrics,i.e.,Matthew’s correlation coefficient,accuracy,and false alarm *** results indicate that the proposed model is superior to the base DNN model as well as other existing ML algorithms found in the literature.

关键词： Anomaly detection deep neural network intrusion detection system stacking ensemble

Composite Vernacular Constructions

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Built Heritage 2019年第4期3卷 26-40页

作者： Miles lewis University of Melbourne MelbourneAustralia

Vernacular building is the building for ordinary people,constrained by the practicalities of environmental conditions and physical materials,and influenced by traditional culture,but not mediated by professional architects and *** of earth and timber,such as wattle and daub,are found in the vernacular in almost every part of the world,but are a source of great confusion to archaeologists and *** are misled by the remains,in which the earth may have survived but the timber usually does *** such as Lehmwickel are never recognised in archaeological *** is no common system of naming or classification,and English speakers regularly describe any combination of earth and timber in walling as‘wattle and daub’.Many of these techniques have been changed by the impact of modern technology,notably pole and pug construction(which is often confused with wattle and daub,though it is quite different in principle);this is essentially a 19^(th) century development because it relies upon plentiful and cheap *** purpose of this paper is to establish a common terminology in English,and where possible in other relevant languages,so that misinterpretations are avoided and scholarship can proceed on an orderly basis.

关键词： mixed construction wattle and daub lath and pug Lehmwickel pole and pug nails

An Optical Pressure Sensor Based on MEMS

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稀有金属材料与工程 2006年第S3期 476-478页

作者： Frank lewis TX 76019 The University of Texas at Arlington Arlington USA

An optical fiber pressure sensor has been developed for the measurement in human *** sensing element is possessed of a membrane structure,which is fabricated by *** fabrication process includes anisotropic wet etching on the silicon *** the transmitting source and signal light,a multimode optical fiber 50/125 μm (core/clad)in diameter was *** intensity of the light reflected back into the fiber varies with the membrane deflection,which is s function of *** deflection of the membrane by applied pressure can be mathematically described.

关键词： optical fiber pressure sensor MEMS

Antibiotic-free antimicrobial poly (methyl methacrylate) bone cements:A state-of-the-art review

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World Journal of Orthopedics 2022年第4期13卷 339-353页

作者： Gladius lewis Department of Mechanical Engineering University of MemphisMemphisTN 38152United States

Prosthetic joint infection(PJI)is the most serious complication following total joint arthroplasty,this being because it is associated with,among other things,high morbidity and low quality of life,is difficult to prevent,and is very challenging to treat/*** many shortcomings of antibiotic-loaded poly(methyl methacrylate)(PMMA)bone cement(ALBC)as an agent for preventing and treating/managing PJI are *** is that microorganisms responsible for most PJI cases,such as methicillin-resistant ***,have developed or are developing resistance to gentamicin sulfate,which is the antibiotic in the vast majority of approved ALBC *** has led to many research efforts to develop cements that do not contain gentamicin(or,for that matter,any antibiotic)but demonstrate excellent antimicrobial *** is a sizeable body of literature on these socalled“antibiotic-free antimicrobial”PMMA bone cements(AFAMBCs).The present work is a comprehensive and critical review of this *** addition to summaries of key trends in results of characterization studies of AFAMBCs,the attractive features and shortcomings of the literature are *** provide motivation for future work,with some ideas being formulation of a new generation of AFAMBCs by,example,adding a nanostructured material and/or an extract from a natural product to the powder and/or liquid of the basis cement,respectively.

关键词： Periprosthetic joint infection Poly(methyl methacrylate)bone cement Antibiotic-loaded poly(methyl methacrylate)bone cement bone cement Antibiotic-free antimicrobial poly(methyl methacrylate)bone cement bone cement

Heterogeneous multi-player imitation learning

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Control Theory and Technology 2023年第3期21卷 281-291页

作者： Bosen Lian Wenqian Xue Frank L.lewis Department of Electrical and Computer Engineering Auburn UniversityAuburnAL 36849USA State Key Laboratory of Synthetical Automation for Process Industries and International Joint Research Laboratory of Integrated Automation Northeastern UniversityShenyang 110819LiaoningChina UTA Research Institute University of Texas at Arlington(UTA)Fort WorthTX 76118USA

This paper studies imitation learning in nonlinear multi-player game systems with heterogeneous control input *** propose a model-free data-driven inverse reinforcement learning(RL)algorithm for a leaner to find the cost functions of a N-player Nash expert system given the expert's states and control *** allows us to address the imitation learning problem without prior knowledge of the expert's system *** achieve this,we provide a basic model-based algorithm that is built upon RL and inverse optimal *** serves as the foundation for our final model-free inverse RL algorithm which is implemented via neural network-based value function *** analysis and simulation examples verify the methods.

关键词： Imitation learning Inverse reinforcement learning Heterogeneous multi-player games Data-driven model-free control

Prenatal risk factors for internalizing and externalizing problems in childhood

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World Journal of Pediatrics 2020年第4期16卷 341-355页

作者： Joyce Tien Gary D.lewis Jianghong Liu Department of Family and Community Health School of NursingUniversity of PennsylvaniaPhiladelphiaPA19104USA University of Arkansas for Medical Sciences Little RockARUSA

Background A growing body of research has documented the effects of prenatal risk factors on a wide spectrum of adverse offspring health *** behavior problems,such as externalizing and internalizing problems,are no *** comprehensive literature review aims to summarize and synthesize current research about commonly experienced prenatal risk factors associated with internalizing and externalizing problems,with a focus on their impact during childhood and *** mechanisms as well as implications are also *** sources The EBSCO,Web of Science,PubMed,Google Scholar,and Scopus databases were searched for studies examining the association between prenatal risk factors and offspring internalizing/externalizing problems,using keywords“prenatal”or“perinatal”or“birth complications”in combination with“internalizing”or“externalizing”.Relevant articles,including experimental research,systematic reviews,meta-analyses,cross-sectional and longitudinal cohort studies,and theoretical literature,were reviewed and synthesized to form the basis of this integrative *** Prenatal risk factors that have been widely investigated with regards to offspring internalizing and externalizing problems encompass health-related risk factors,including maternal overweight/obesity,substance use/abuse,environmental toxicant exposure,maternal infection/inflammation,as well as psychosocial risk factors,including intimate partner violence,and anxiety/***,both epidemiological and experimental studies support the adverse associations between these prenatal factors and increased risk of emotional/behavioral problem development during childhood and *** mechanisms of action underlying these associations include hormonal and immune system *** include prenatal education,screening,and intervention *** Prenatal risk factors are associated with a constellation of offspring internalizin

关键词： Externalizing Internalizing Obstetrical Pregnancy Prenatal risk factors

Reinforcement learning for optimal tracking of large-scale systems with multitime scales

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Science China(Information Sciences) 2023年第7期66卷 5-29页

作者： Jinna LI Hao NIE Tianyou CHAI Frank L.lewis School of Information and Control Engineering Liaoning Petrochemical University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University UTA Research Institute University of Texas at Arlington

This paper aims to solve an optimal tracking control(OTC) problem of large-scale systems with multitime scales and coupled subsystems using singular perturbation(SP) theory and reinforcement learning(RL) techniques. A considerable contribution of this paper is the development of a data-driven SP-based RL method for the OTC of unknown large-scale systems with multitime scales. To achieve this, a multitime scale tracking problem was decomposed into a linear quadratic tracker problem for slow subsystems and a dynamical game problem for fast subsystems using the SP theory. Then, the distributed composite feedback controllers were found using a distributed off-policy integral RL algorithm that uses only measured data from the system in real time. Thus, the operational index can follow its prescribed target value via an approximately optimal approach. Theoretical analysis and proof are presented to demonstrate that the sum of the performances of reduced-order subsystems is approximately equal to the performance of the original large-scale system. Finally, numerical and practical examples are provided to validate the effectiveness of the proposed method.

关键词： reinforcement learning singular perturbation multitime scales data-driven control

Adaptive Uniform Performance Control of Strict-Feedback Nonlinear Systems With Time-Varying Control Gain

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IEEE/CAA Journal of Automatica Sinica 2023年第2期10卷 451-461页

作者： Kai Zhao Changyun Wen Yongduan Song Frank L.lewis IEEE the Department of Electrical and Computer Engineering National University of SingaporeSingapore 119077Singapore the School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore the State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing Key Laboratory of Intelligent Unmanned SystemsSchool of AutomationChongqing UniversityChongqing 400044China the UTA Research Institute University of Texas at ArlingtonFort WorthTX 76118 USA

In this paper,we present a novel adaptive performance control approach for strict-feedback nonparametric systems with unknown time-varying control coefficients,which mainly includes the following ***,by introducing several key transformation functions and selecting the initial value of the time-varying scaling function,the symmetric prescribed performance with global and semi-global properties can be handled uniformly,without the need for control ***,to handle the problem of unknown time-varying control coefficient with an unknown sign,we propose an enhanced Nussbaum function(ENF)bearing some unique properties and characteristics,with which the complex stability analysis based on specific Nussbaum functions as commonly used is no longer ***,by utilizing the core-function information technique,the nonparametric uncertainties in the system are gracefully handled so that no approximator is ***,simulation results verify the effectiveness and benefits of the approach.

关键词： Adaptive control enhanced Nussbaum function(ENF) strict-feedback systems unified prescribed performance

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“瓣”随心动

环球科学 2024年第7期 16-17页

作者：塔尼娅·刘易斯安君(译) 不详

患有先天性心脏瓣膜缺损的孩子通常需要接受移植手术,以置换来自捐献者的瓣膜。由于经过冻融的瓣膜组织已经死亡,无法继续生长,接受移植的孩子不得不定期接受手术,置换更大的瓣膜,这增加了预后不良的风险。但是一项新的手术方法或许能... 详细信息

患有先天性心脏瓣膜缺损的孩子通常需要接受移植手术,以置换来自捐献者的瓣膜。由于经过冻融的瓣膜组织已经死亡,无法继续生长,接受移植的孩子不得不定期接受手术,置换更大的瓣膜,这增加了预后不良的风险。但是一项新的手术方法或许能让移植的瓣膜随儿童的成长发育一起生长——同时移植部分心脏、具有生理活性的瓣膜及部分血管。

关键词：捐献者预后不良移植手术先天性心脏生理活性瓣膜置换