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Template-Based Gait Authentication Through Bayesian Thresholding

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 209-219页

作者： Ebenezer R.H.P.Isaac Susan Elias Srinivasan Rajagopalan K.S.Easwarakumar IEEE the Department of Computer Science and Engineering Indian Institute of Technology Madras the School of electronics Engineering VIT University the Department of Physiology and biomedical Engineering Mayo Clinic the Department of Computer Science and Engineering Anna University

While gait recognition is the mapping of a gait sequence to an identity known to the system, gait authentication refers to the problem of identifying whether a given gait sequence belongs to the claimed identity. A typical gait authentication system starts with a feature representation such as a gait template, then proceeds to extract its features, and a transformation is ultimately applied to obtain a discriminant feature set. Almost every authentication approach in literature favours the use of Euclidean distance as a threshold to mark the boundary between a legitimate subject and an impostor. This article proposes a method that uses the posterior probability of a Bayes' classifier in place of the Euclidean distance. The proposed framework is applied to template-based gait feature representations and is evaluated using the standard CASIA-B gait database. Our study experimentally demonstrates that the Bayesian posterior probability performs significantly better than the de facto Euclidean distance approach and the cosine distance which is established in research to be the current state of the art.

关键词： Bayes’ rule biometrics gait recognition linear discriminant analysis verification

Advances in the Emerging Gradient Designs of Li Metal Hosts

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Research 2022年第4期2022卷 741-756页

作者： Wanqing Guan Xiaoqi Hu Yuhang Liu Jinmeng Sun Chen He Zhuzhu Du Jingxuan Bi Ke Wang Wei Ai Frontiers Science Center for Flexible electronics(FSCFE) Xi'an Institute of Flexible Electronics(IFE)and Xian Institute of Biomedical Materials Engineering(IBME)Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an710072China School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingaporeSingapore 639798

Developing host has been recognized a potential countermeasure to circumvent the intrinsic drawbacks of Li metal anode(LMA),such as uncontrolled dendrite growth,unstable solid electrolyte interface,and infinite volume *** realize proper Li accommodation,particularly bottom-up deposition of Li metal,gradient designs of host materials including lithiophilicity and/or conductivity have attracted a great deal of attention in recent ***,a critical and specialized review on this quickly evolving topic is still *** this review,we attempt to comprehensively summarize and update the related advances in guiding Li nucleation and ***,the fundamentals regarding Li deposition are discussed,with particular attention to the gradient design principles of host ***,the progress of creating diferent gradients in terms of lithiophilicity,conductivity,and their hybrid is systematically ***,future challenges and perspective on the gradient design of advanced hosts towards practical LMAs are provided,which would provide a useful guidance for future studies.

关键词： conductivity unstable electrolyte

Stimuli-responsive photofunctional materials for green and security printing

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InfoMat 2021年第1期3卷 82-100页

作者： Yun Ma Yaxin Yu Jiangang Li Shujuan Liu Wei Huang Qiang Zhao Key Laboratory for Organic electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications(NUPT)NanjingChina Frontiers Science Center for Flexible electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)and Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)Xi'anChina

Information recording on paper has always been the most important approach to keep records of human activity and to spread *** the progress of science and technology,paper with different functions should be exploited to conform to the increasing demands in various *** one aspect,traditional paper can only be used once,and using large amounts of paper causes deforestation,additional solid waste treatment,environmental pollution,and high energy ***,the development of rewritable paper that is environment-friendly,low cost,and can save resources is significant for green *** the other aspect,information leakage brings security issues,which may lead to severe consequences,such as war outbreak,economic loss,social problems,and so ***,the development of security printing has also attracted wide ***-responsive photofunctional materials that have reversible variations in absorption or emission in response to changes in the external environmental have a great potential for the achievement of green and security *** date,much progress has been made in these research *** paper lists different smart materials that respond to various external stimuli,such as light,water,pH,heat,and metal ions,and summarizes the recent advances towards green and security ***,we discuss the current challenges and future directions in this rapidly growing research *** is expected that this review article will stimulate and guide future studies for the advanced green and security printing.

关键词： green printing rewritable paper security printing stimuli-responsive photofunctional materials

De novo transcriptome assembly of RNA-Seq reads with different strategies

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Science China(Life Sciences) 2011年第12期54卷 1129-1133页

作者： CHEN Geng YIN KangPing WANG Charles SHI TieLiu Center for bioinformatics and Computational Biology Institute of Biomedical Sciences School of Life Science East China Normal University Shanghai 200241 China Functional Genomics Core Beckman Research Institute City of Hope Comprehensive Cancer Center Duarte CA 91010 USA

De novo transcriptome assembly is an important approach in RNA-Seq data analysis and it can help us to reconstruct the transcriptome and investigate gene expression profiles without reference genome *** carried out transcriptome assemblies with two RNA-Seq datasets generated from human brain and cell line,*** then determined an efficient way to yield an optimal overall assembly using three different *** first assembled brain and cell line transcriptome using a single k-mer *** we tested a range of values of k-mer length and coverage cutoff in ***,we combined the assembled contigs from a range of k values to generate a final *** comparing these assembly results,we found that using only one k-mer value for assembly is not enough to generate good assembly results,but combining the contigs from different k-mer values could yield longer contigs and greatly improve the overall assembly.

关键词： RNA-Seq de novo transcriptome assembly next generation sequencing

Computational Screening of Phase-separating Proteins

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Genomics, Proteomics & bioinformatics 2021年第1期19卷 13-24页

作者： Boyan Shen Zhaoming Chen Chunyu Yu Taoyu Chen Minglei Shi Tingting Li Department of biomedical Informatics School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China institute of Systems Biomedicine School of Basic Medical SciencesPeking University Health Science CenterBeijing 100191China MOE Key Laboratory of bioinformatics Bioinformatics Division and Center for Synthetic&Systems BiologyBNRistSchool of MedicineTsinghua UniversityBeijing 100084China

Phase separation is an important mechanism that mediates the compartmentalization of proteins in *** that can undergo phase separation in cells share certain typical sequence features,like intrinsically disordered regions(IDRs)and multiple modular *** analysis tools are commonly used in the screening of these ***,current phase separation predictors are mostly designed for IDR-containing proteins,thus inevitably overlook the phase-separating proteins with relatively low IDR *** other than amino acid sequence could provide crucial information for identifying possible phase-separating proteins:protein–protein interaction(PPI)networks show multivalent interactions that underlie phase separation process;post-translational modifications(PTMs)are crucial in the regulation of phase separation behavior;spherical structures revealed in immunofluorescence(IF)images indicate condensed droplets formed by phase-separating proteins,distinguishing these proteins from non-phaseseparating ***,we summarize the sequence-based tools for predicting phaseseparating proteins and highlight the importance of incorporating PPIs,PTMs,and IF images into phase separation prediction in future studies.

关键词： Phase separation Prediction Protein–protein interaction Protein post-translational modification Immunofluorescence image

Metagenomic Surveys of Gut Microbiota

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Genomics, Proteomics & bioinformatics 2015年第3期13卷 148-158页

作者： Rahul Shubhra Mandal Sudipto Saha Santasabuj Das biomedical Informatics Centre National Institute of Cholera and Enteric Diseases bioinformatics Centre Bose Institute Division of Clinical Medicine National Institute of Cholera and Enteric Diseases

Gut microbiota of higher vertebrates is host-specific. The number and diversity of the organisms residing within the gut ecosystem are defined by physiological and environmental factors, such as host genotype, habitat, and diet. Recently, culture-independent sequencing techniques have added a new dimension to the study of gut microbiota and the challenge to analyze the large volume of sequencing data is increasingly addressed by the development of novel computational tools and methods. Interestingly, gut microbiota maintains a constant relative abundance at operational tax- onomic unit （OTU） levels and altered bacterial abundance has been associated with complex diseases such as symptomatic atherosclerosis, type 2 diabetes, obesity, and colorectal cancer. Therefore, the study of gut microbial population has emerged as an important field of research in order to ulti- mately achieve better health. In addition, there is a spontaneous, non-linear, and dynamic interac- tion among different bacterial species residing in the gut. Thus, predicting the influence of perturbed microbe-microbe interaction network on health can aid in developing novel therapeutics. Here, we summarize the population abundance of gut microbiota and its variation in different clinical states, computational tools available to analyze the pyrosequencing data, and gut microbe-microbe inter- action networks.

关键词： Disease Sequencing 16S rRNA Operational taxonomic unit Microbial interactionnetwork

Fully integrated and broadband Si-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing

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Photonics Research 2024年第3期12卷 I0001-I0010页

作者： VALERIO VITALI THALÍA DOMÍNGUEZ BUCIO HAO LIU JOSÉMANUEL LUQUE GONZÁLEZ FRANCISCO JURADO-ROMERO ALEJANDRO ORTEGA-MOÑUX GLENN CHURCHILL JAMES C.GATES JAMES HILLIER NIKOLAOS KALFAGIANNIS DANIELE MELATI JENS H.SCHMID ILARIA CRISTIANI PAVEL CHEBEN J.GONZALO WANGÜEMERT-PÉREZ ÑIGO MOLINA-FERNÁNDEZ FREDERIC GARDES COSIMO LACAVA PERIKLIS PETROPOULOS Optoelectronics Research Centre University of SouthamptonSouthampton SO171BJUK Electrical Computer and Biomedical Engineering DepartmentUniversity of PaviaPavia 27100Italy Telecommunication Research institute(TELMA) Universidad de MálagaCEI Andalucı´a TECHE.T.S.I.Telecomunicación29010 MálagaSpain School of Science and Technology Nottingham Trent UniversityNottingham NG118NSUK Department of Electrical Engineering Eindhoven University of TechnologyEindhoven 5600 MBThe Netherlands Department of Materials Science and Engineering University of IoanninaIoannina 45110Greece Centre de Nanosciences et de Nanotechnologies UniversitéParis-SaclayCNRS91120 PalaiseauFrance Advanced electronics and Photonics Research Center National Research Council CanadaOttawaOntario K1A 0R6Canada

Intermodal four-wave mixing(FWM)processes have recently attracted significant interest for all-optical signal processing applications thanks to the possibility to control the propagation properties of waves exciting distinct spatial modes of the same *** allows,in principle,to place signals in different spectral regions and satisfy the phase matching condition over considerably larger bandwidths compared to intramodal ***,the demonstrations reported so far have shown a limited bandwidth and suffered from the lack of on-chip components designed for broadband manipulation of different *** demonstrate here a silicon-rich silicon nitride wavelength converter based on Bragg scattering intermodal FWM,which integrates mode conversion,multiplexing and de-multiplexing functionalities *** system enables wavelength conversion between pump waves and a signal located in different telecommunication bands(separated by 60 nm)with a 3 dB bandwidth exceeding 70 nm,which represents,to our knowledge,the widest bandwidth ever achieved in an intermodal FWM-based system.

关键词： scattering pump modal

Ultraclean transfer of graphene by mechanically exfoliating polymer with modified crosslink density

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Nano Research 2024年第8期17卷 6795-6802页

作者： Qi Lu Jiawei Yang Chaofan Zhou Zhaoning Hu Saiyu Bu Bingbing Guo Yixuan Zhao Junhao Liao Mingpeng Shang Ge Chen Kaicheng Jia Jianbo Yin Qiang Zeng Li Lin Zhongfan Liu College of Science China University of Petroleum(Beijing)Beijing 102249China School of Materials Science and Engineering Peking UniversityBeijing 100871China Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene institute Beijing 100095China Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Department of electronics Peking UniversityBeijing 100871China Second Clinical Division National Engineering Laboratory for Digital and Material Technology of StomatologyPeking University School and Hospital of StomatologyBeijing 100081China

The transfer of graphene from metallic substrates onto application-specific substrates is usually inevitable for the applications of high-quality graphene films derived from chemical vapour deposition(CVD)*** used to support the graphene films during the transfer,the coating of the polymer would produce the surface contaminations and hinder the industrially compatible *** this work,through the thermal imidization of polyamide acid(PAA)to polyimide(PI)and tuning of the concentration of dangling chains,we achieved the ultraclean and crack-free transfer of graphene wafers with high electronic *** resulting contamination-free and hydrophilic surface also enabled the observed improved cell viability in a biomedical *** avoiding aqueous etching or the usage of strong bases,our proposed transfer method is industrially compatible for batch transfer of graphene films towards the real applications.

关键词： chemical vapour deposition(CVD)graphene films graphene transfer ultraclean transfer transfer medium crosslink density cell viability assay

A novelα-ketoamide reactivity-based two-photon fluorogenic probe for visualizing peroxynitrite in Parkinson's disease models

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创新光学健康科学杂志(英文) 2023年第4期16卷 79-89页

作者： Tao Shao Xianning Xu Lan Wang Yu Shen Jun Zhao Huizi Li Duoteng Zhang Wei Du Hua Bai Bo Peng Lin Li Frontiers Science Center for Flexible electronics Xi'an institute of Flexible electronics(IFE)and Xi'an institute of biomedical Materials&Engineering Northwestern Polytechnical University Xi'an 710072P.R.China Key Laboratory of Flexible electronics(KLOFE)&institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech) Nanjing 211816P.R.China Department of Outpatient PLA Rocket Force Characteristic Medical Center Beijing 100088 P.R.China The institute of Flexible electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005FujianP.R.China

Peroxynitrite(ONOO^(-))contributes to oxidative stress and neurodegeneration in Parkinson's disease(PD).Developing a peroxynitrite probe would enable in situ visualization of the overwhelming ONOO^(-)flux and understanding of the ONOO^(-)stress-induced neuropathology of ***,a novelα-ketoamide-based fluorogenic probe(DFlu)was designed for ONOO^(-)monitoring in multiple PD *** results demonstrated that DFlu exhibits a fluorescence turn-on response to ONOO^(-)with high specificity and *** efficacy of DFlu for intracellular ONOO^(-)imaging was demonstrated *** results showed that DFlu can successfully visualize endogenous and exogenous ONOO^(-)in cells derived from chemical and biochemical *** importantly,the two-photon excitation ability of DFlu has been well demonstrated by monitoring exogenous/endogenous ONOO^(-)production and scavenging in live zebraflsh PD *** work provides a reliable and promisingα-ketoamide-based optical tool for identifying variations of ONOO^(-)in PD models.

关键词： α-Ketoamide two-photon fluorogenic probe bioimaging peroxynitrite Parkinson's disease.