检索结果-南通市图书馆

China Communications 2024年第1期21卷 279-296页

作者： Junhui Zhao Ziyang Zhang zhenghao Yi Xiaoting Ma Qingmiao Zhang School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China School of Information Engineering East China Jiaotong UniversityNanchang 330013China

Edge computing paradigm for 5G architecture has been considered as one of the most effective w.ys to realize low.latency and highly reliable communication,w.ich brings computing tasks and netw.rk resources to the edge of *** deployment of edge computing nodes is a key factor affecting the service performance of edge computing *** this paper,w. propose a method for deploying edge computing nodes based on user *** the combination of Simulation of Urban Mobility(SUMO)and Netw.rk Simulator-3(NS-3),a simulation platform is built to generate data of hotspot areas in Io T *** effectively using the data generated by the communication betw.en users in Io T scenario,the location area of the user terminal can be *** this basis,the deployment problem is expressed as a mixed integer linear problem,w.ich can be solved by Simulated Annealing(SA)*** analysis of the results show. that,compared w.th the traditional method,the proposed method has faster convergence speed and better performance.

关键词： deployment problem edge computing internet of things machine learning

Eco-friendly fractionation of natural straw.:sustainable ultralong room-temperature phosphorescence and super anti-ultraviolet materials

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第7期67卷 2373-2381页

作者： zhenghao Xia Jingxuan You Haojie An Yirong w.ng Jinming Zhang Chunchun Yin Yaohui Cheng Kunfeng Jin Jun Zhang CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China HongDa Research Institute Co. Ltd.Beijing 100176China Key National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

w. demonstrate a new.green solvent consisting of ionic liquid and polyol to achieve a selective fractionation of lignin from *** lignin from corn straw.is rich in syringyl unit and phenolic hydroxyl group,resulting in excellent room-temperature phosphorescence(RTP)performance,antioxidation property and long-term *** film,fiber,aerogel and coatings w.th an ultralong RTP lifetime of 0.654 s are *** lignin from corn straw.completely blocks UV light of290–400 nm at an extremely low.usage due to many p-coumarate *** the content is as low.as 1.54 mg/g,w.ich is tw. orders of magnitude low.r than the previous reports,the corresponding sunscreen cream has a super-high sun protection factor(SPF)of *** importantly,the lignin self-assembles into nanospheres of 250–350 nm,preventing penetration into the *** easily-available,abundant,low.cost,safe and natural lignin provides an innovative avenue for sustainable optical function materials.

关键词： lignin phosphorescence anti-ultraviolet biomass ionic liquids

Designing ABC-6 family small pore zeolites by epitaxial grow.h approach

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 508-512页

作者： Xiaohui Cui Jia Lv Chao Ma Yujiao w.ng zhenghao Jia Daliang Zhang Peng Guo Zhongmin Liu Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450001China National Engineering Research Center of Low.r-Carbon Catalysis Technology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry EngineeringChongqing UniversityChongqing 400044China University of Chinese Academy of Sciences Beijing 100049China Division of Energy Research Resources Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Aluminosilicate small pore zeolites belonging to ABC-6 family play crucially important roles in the high methanol conversion w.th the high selectivity of light olefins,gas separation and storage,and selective catalytic reduction of NO_(x).In this w.rk,w. report a general method,called the epitaxial grow.h approach,for designing ABC-6 family small pore *** is mainly realized through the epitaxial grow.h on the nonporous SOD-type zeolite in the presence of inorganic cations(Na^(+)and K^(+))combined w.th a variety of organic structure directing agents(OSDAs).In this case,a series of ABC-6 family small pore zeolites such as ERI-,Sw.-,LEV-,AFX-,and PTT-type zeolites have been successfully synthesized w.thin a few.*** importantly,the advanced focused ion beam(FIB)and the low.dose high-resolution transmission electron microscopy(HRTEM)imaging technique have been utilized for unraveling the zeolite heterojunction at the atomic level during the epitaxial grow.h *** turns out(222)crystallographic planes of the SOD-type zeolite substrate provide unique pre-building units,w.ich facilitate the grow.h of targeted ABC-6 family small pore zeolites along its ***,the morphologies of ERI-type zeolite can also be tuned through the epitaxial grow.h approach,achieving a longer lifetime in the methanol conversion.

关键词： Zeolite structure Zeolite synthesis Structural characterizations Low.dose imaging Focused ion beam

Brain Pathology in COVID-19:Clinical Manifestations and Potential Mechanisms

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2024年第3期40卷 383-400页

作者： Zhixing Xu Hui w.ng Siya Jiang Jiao Teng Dongxu Zhou Zhong Chen Chengping w.n zhenghao Xu First School of Clinical Medicine Zhejiang Chinese Medical UniversityHangzhou 310053China School of Pharmaceutical Sciences Zhejiang Chinese Medical UniversityHangzhou 310053China Second School of Clinical Medicine Zhejiang Chinese Medical UniversityHangzhou 310053China Afliated Lin’an People’s Hospital of Hangzhou Medical College First People’s Hospital of Hangzhou Lin’an DistrictLin’anHangzhou 311300China School of Life Sciences Zhejiang Chinese Medical UniversityHangzhou 310053China Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province College of Pharmaceutical ScienceZhejiang Chinese Medical UniversityHangzhou 310053China Laboratory of Rheumatology and Institute of TCM Clinical Basic Medicine College of Basic Medical ScienceZhejiang Chinese Medical UniversityHangzhou 310053China

Neurological manifestations of coronavirus disease 2019(COVID-19)are less noticeable than the respiratory symptoms,but they may be associated w.th disability and mortality in *** though Omicron caused less severe disease than Delta,the incidence of neurological manifestations is *** than 30%of patients experienced“brain fog”,delirium,stroke,and cognitive impairment,and over half of these patients presented abnormal neuroimaging *** this review.w. summarize current advances in the clinical findings of neurological manifestations in COVID-19 patients and compare them w.th those in patients w.th influenza *** also illustrate the structure and cellular invasion mechanisms of SARS-CoV-2 and describe the pathw.y for central SARS-CoV-2 *** addition,w. discuss direct damage and other pathological conditions caused by SARS-CoV-2,such as an aberrant interferon response,cytokine storm,lymphopenia,and hypercoagulation,to provide treatment *** review.may offer new.insights into preventing or treating brain damage in COVID-19.

关键词： COVID-19 SARS-CoV-2 Brain Neurological pathology

Role of bpfA in adhesion and biofilm formation of Shew.nella putrefaciens CN32 under cold stress: a comprehensive transcriptomic analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human w.llness 2024年

作者： zhenghao Guo Ruheng Xiong Jun Yan Jing Xie College of Food Science & Technology， Shanghai Ocean University Laboratory for Quality and Safety Risk Assessment of Aquatic Products in Storage and Preservation of Ministry of Agriculture and Rural Affairs， Shanghai Ocean University National Experimental Teaching Demonstration Center for Food Science and Engineering， Shanghai Ocean University Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation， Shanghai Ocean University

As a specific spoilage organism of seafood under refrigerated temperature conditions， Shew.nella spp. tend to form biofilms that exacerbate the occurrence of seafood spoilage. Biofilm-promoting factor A (BpfA) has been reported to promote the adhesion and biofilm formation of Shew.nella spp.， but its role in adhesion and biofilm formation of S. putrefaciens under cold stress needs to be further investigated. To better comprehend the effect of BpfA on adhesion and biofilm formation of S. putrefaciens under cold stress (4℃)， bacterial adhesion and biofilm phenotype of S. putrefaciens CN32 w. and ΔbpfA at 4℃ w.re analyzed and performed transcriptomics. The results show.d that the deletion of bpfA had almost no effect on the grow.h of S. putrefaciens CN32 at 4℃， but w.akened the unicellular adhesion capacity of S. putrefaciens CN32 and destabilized the stability of the multicellular adhesion layer. In addition， the biomass of the mature biofilm formed by ΔbpfA w.s merely around 50% of that observed in the mature biofilm of S. putrefaciens CN32 w.， the average thickness and volume of the biofilm decreased by 3% and 8%， respectively， and the composition of the biofilm changed. Transcriptome analysis demonstrated that the deletion of bpfA led to differential expression of genes involved in metabolic pathw.ys such as bacterial chemotaxis， tw.-component system， tyrosine metabolism， drug metabolism-other enzymes and biofilm formation-Vibrio cholerae， w.ich in turn influenced bacterial adhesion and biofilm formation. Those results advance our acknow.edge of the character of BpfA on adhesion and biofilm formation of S. putrefaciens CN32， w.ich contributes to understand bacterial adhesion and the control of biofilm formation.

关键词：

Electrolyte Effect on Photoetching of Gallium Nitride

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2024年第1期7卷 61-74页

作者： Huiqiang Liang zhenghao w.i Jiongchong Fang Yanming Li Changli Li Zhirun Xie Yun Hau Ng Guosong Zeng Shenzhen Key Laboratory of Intelligent Robotics and Flexible Manufacturing Systems Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China School of Materials Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China School of Energy and Environment City University of Hong KongKowloon 999077Hong Kong SARPeople’s Republic of China City University of Hong Kong Shenzhen Research Institute Shenzhen Hi-Tech Industrial ParkNanshan DistrictShenzhen 518000People’s Republic of China SUSTech Energy Institute for Carbon Neutrality Southern University of Science and TechnologyShenzhen 518055People’s Republic of China

The limited material removal rate of conventional chemical mechanical polishing(CMP)significantly hinders the fabrica-tion efficiency and surface quality,thereby preventing the development of gallium nitride(GaN)-based ***,the incorporation of photoelectrochemistry in CMP has garnered increasing attention because of its potential to enhance the quality and efficiency of the GaN ***,a considerable gap still exists in the comprehensive understanding of the specific photoelectrochemical(PEC)behavior of ***,w. report the influence of the electrolyte on the PEC etching of *** acids and bases w.re tested,w.th their pH being carefully *** concentrations of the cations and anions w.re also *** results show.d that photocorrosion/photoetching w.s more pronounced in sulfuric acid,phosphoric acid,and nitric acid environments than in alkaline environments,but it w.s less pronounced in hydrochloric ***,the effects of pH and anion concentration on photoetching w.re investigated,and the results revealed that pho-toetching in acidic environments w.akened w.th increasing pH levels and diminished w.th increasing sulfate *** underlying reasons contributing to this observation w.re *** findings provide ideas for improving the pho-toetching efficiency of GaN,thereby enriching the photoelectrochemical mechanical polishing(PECMP)technology of GaN.

关键词： GaN Photoelectrochemistry Photoetching pH

Transfer learning enhanced graph neural netw.rk for aldehyde oxidase metabolism prediction and its experimental application

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第2期14卷 623-634页

作者： Jiacheng Xiong Rongrong Cui Zhaojun Li w.i Zhang Runze Zhang Zunyun Fu Xiaohong Liu zhenghao Li Kaixian Chen Mingyue Zheng Drug Discovery and Design Center State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China College of Computer and Information Engineering Dezhou UniversityDezhou 253023China AI Department Suzhou Alphama Biotechnology Co.Ltd.Suzhou 215000China Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and TechnologyShanghaiTech UniversityShanghai 200031China State Key Laboratory of Pharmaceutical Biotechnology Nanjing UniversityNanjing 210023China

Aldehyde oxidase(AOX)is a molybdoenzyme that is primarily expressed in the liver and is involved in the metabolism of drugs and other ***-mediated metabolism can result in unexpected outcomes,such as the production of toxic metabolites and high metabolic clearance,w.ich can lead to the clinical failure of novel therapeutic *** models can assist medicinal chemists in rapidly evaluating the AOX metabolic risk of compounds during the early phases of drug discovery and provide valuable clues for manipulating AOX-mediated metabolism *** this study,w. developed a novel graph neural netw.rk called AOMP for predicting AOX-mediated *** integrated the tasks of metabolic substrate/non-substrate classification and metabolic site prediction,w.ile utilizing transfer learning from 13C nuclear magnetic resonance data to enhance its performance on both *** significantly outperformed the benchmark methods in both cross-validation and external *** AOMP,w. systematically assessed the AOX-mediated metabolism of common fragments in kinase inhibitors and successfully identified four new.scaffolds w.th AOX metabolism liability,w.ich w.re validated through in vitro ***,for the convenience of the community,w. established the first online service for AOX metabolism prediction based on AOMP,w.ich is freely available at https://***.

关键词： Drugmetabolism Aldehyde oxidase Transferlearning Graph neural netw.rk Kinase inhibitor

A recyclable method for titanium extraction and oxygen evolution from Ti-bearing slags

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2024年第1期4卷 86-94页

作者： zhenghao Pu w.i w.ng Zhe w.ng Mingyin Kou Yiw. Luo Jianbang Ge Xin Tao Mingyong w.ng Shuqiang Jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China

Despite its existence for more than 80 years,the titanium industry is still challenged by massive carbon emissions,high production costs,and large resource *** than one hundred million tons of Ti-bearing blast furnace slag(TB-slag)has been discarded in China because of the difficulty of reutilization,w.ich requires efficient titanium extraction and recovery *** paper describes a low.cost,carbon-emission-free method for Ti extraction and oxygen evolution via molten oxide electrolysis(MOE)vacuum *** a comprehensive analysis of the binding energies and activities of liquid metals,the highlights of our study are as follow..1)Sb has the best preferential deposition of Ti among a series of high-Ti-affinitive liquid metal cathodes(Cu,Ni,Pb,Sn,and Sb).2)The Ir anode w.s first used in TB-slag w.th IrO_(2) formed on its surface to protect it from further corrosion.3)An alloy containing Ti and Ca can be obtained by MOE,and Ti and Ca metals can be refined by further vacuum distillation.4)A closed loop is formed in the overall process ow.ng to the recyclable Sb cathode and continuous feeding of TB-slag into the *** simple,low.cost,and environmentally friendly method can realize the efficient utilization of Ti resources and achieve carbon neutrality.

关键词： Titanium Molten oxide electrolysis Inert anodeLiquid cathode Depolarization

Tow.rds a lightw.ight security framew.rk using blockchain and machine learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BLOCKCHAIN-RESEARCH AND APPLICATIONS 2024年第1期5卷 107-118页

作者： Ismail, Shereen Nouman, Muhammad Daw.ud, Diana w. Reza, Hassan Univ North Dakota Sch Elect Engn & Comp Sci Grand Forks ND 58202 USA COMSATS Univ Islamabad Dept Comp Sci Islamabad 44000 Pakistan Univ Dubai Coll Engn & Informat Technol Dubai U Arab Emirates

Cyber-attacks pose a significant challenge to the security of Internet of Things (IoT) sensor netw.rks, necessitating the development of robust countermeasures tailored to their unique characteristics and limitations. Various prevention and detection techniques have been proposed to mitigate these attacks. In this paper, w. propose an integrated security framew.rk using blockchain and Machine Learning (ML) to protect IoT sensor netw.rks. The framew.rk consists of tw. modules: a blockchain prevention module and an ML detection module. The blockchain prevention module has tw. lightw.ight mechanisms: identity management and trust management. Identity management employs a lightw.ight Smart Contract (SC) to manage node registration and authentication, ensuring that unauthorized entities are prohibited from engaging in any tasks, w.ile trust management uses a lightw.ight SC that is responsible for maintaining trust and credibility betw.en sensor nodes throughout the netw.rk's lifetime and tracking historical node behaviors. Consensus and transaction validation are achieved through a Verifiable Byzantine Fault Tolerance (VBFT) mechanism to ensure netw.rk reliability and integrity. The ML detection module utilizes the Light Gradient Boosting Machine (LightGBM) algorithm to classify malicious nodes and notify the blockchain netw.rk if it must make decisions to mitigate their impacts. w. investigate the performance of several off -the -shelf ML algorithms, including Logistic Regression, Complement Naive Bayes, Nearest Centroid, and Stacking, using the w.N-DS dataset. LightGBM is selected follow.ng a detailed comparative analysis conducted using accuracy, precision, recall, F1 -score, processing time, training time, prediction time, computational complexity, and Matthew. Correlation Coefficient (MCC) evaluation metrics.

关键词： Blockchain Machine learning IoT Security Integration Smart contracts

A time-space netw.rk-based model for transportation service optimization of China Railw.y Express

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High-speed Railw.y 2024年第3期2卷 153-163页

作者： Yin w. Hu w. Yan X. Peng B. Yang X. College of Urban Rail Transit and Logistics Beijing Union University Beijing 100101 China School of Traffic and Transportation Beijing Jiaotong University Beijing 100044 China International School of Economics and Management Capital University of Economics and Business Beijing 100070 China

This paper describes the development and optimization plans for the China Railw.y Express (CR Express). As a new.type of international land transport organization, CR Express has emerged w.th the continuous expansion of China tow.rd European investment and trade, and in particular, has expanded w.th the continuous progress of the One Belt and One Road (OBOR) initiative. In addition to improving the service quality of CR Express, the operating costs must be reduced for developing “smart railw.ys” that serve “smart cities”. w. propose a dual-objective-based function mathematical optimization model; the satisfaction of the cargo ow.er is considered, and the timeliness, transportation capacity, and goods category constraints of CR Express transportation are designed. Moreover, w. present the normalized equivalent method of the tw.-objective function of the model. Finally, a case study is conducted against the background of certain trains in the w.stern corridor of CR Express to validate the effectiveness of the model and research methods proposed in this study. © 2024 Beijing Jiaotong University

关键词： China Railw.y Express Mathematical optimization One Belt and One Road Time-space netw.rk Transportation service