检索结果-南通市图书馆

Distinctive clinical and laboratory features of COVID-19 and H1N1 influenza infections among hospitalized pediatric patients

引用

World journal of Pediatrics 2021年第3期17卷 272-279页

作者： Ali Alsuheel Asseri Ayed A.Shati Saleh M.Al-Qahtani Ibrahim A.Alzaydani Ahmed A.Al-jarie mohammed j.alaliani Abdelwahid Saeed Ali Department of Child Health College of MedicineKing Khalid UniversityAbhaSaudi Arabia Department of Pediatrics Abha Maternity and Children HospitalAbhaSaudi Arabia General Directorate of Health Affairs Infection Prevention and Control AdministrationAseer RegionMinistry of HealthAbhaSaudi Arabia Department of Microbiology and Clinical Parasitology College of MedicineKing Khalid UniversityAbhaSaudi Arabia

Background It had been documented in many studies that pediatric coronavirus disease 2019(COVID-19)is characterized by low infectivity rates,low mortalities,and benign disease *** the other hand,influenza type A viruses are recognized to cause severe and fatal infections in children populations *** study is aimed to compare the clinical and laboratory characteristics of COVID-19 and H1N1 influenza *** A retrospective study comprising 107 children hospitalized at Abha Maternity and Children Hospital,Southern region of Saudi Arabia,with laboratory-confirmed COVID-19 and H1N1 influenza infections was carried out.A complete follow-up for all patients from the hospital admission until discharge or death was *** clinical data and laboratory parameters for these patients were collected from the medical records of the *** Out of the total enrolled patients,73(68.2%)were diagnosed with COVID-19,and 34(31.8%)were diagnosed with H1N1 *** median age is 12 months for COVID-19 patients and 36 months for influenza patients.A relatively higher number of patients with influenza had a fever and respiratory symptoms than COVID-19 *** contrast,gastrointestinal symptoms were observed in a higher number of COVID-19 patients than in influenza patients.A statistically significant increase in white cell counts is noted in COVID-19 but not in influenza patients(P<0.05).There are no obvious variations in the mean period of duration of hospitalization between COVID-19 and influenza ***,the total intensive care unit length of stay was longer for influenza compared to COVID-19 *** A considerable number of children infected with COVID-19 and H1N1 influenza were noted and reported in this *** were no significant variations in the severity of the symptomatology and laboratory findings between the two groups of *** differences between these patients in some hospitalization facto

关键词： Children Coronavirus disease 2019 H1N1 influenza.Laboratory indices Symptoms

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Understanding the potential relationship between the socio-economic variables and contributions to OpenStreetMap

引用

International journal of Digital Earth 2015年第11期8卷 861-876页

作者： j.jokar Arsanjani mohammed Bakillah GIScience Research Group Institute of GeographyHeidelberg UniversityHeidelbergGermany

OpenStreetMap(OSM)has seen an exponential increase in the last few years and large volumes of geodata have been received from volunteered *** collected geodata are heterogeneous in terms of different dimensions such as spatial patterns of contributions,quality,patterns of contributing individuals,and type of *** contributors’personal information is anonymously stored by the OSM administrators,alternative methods are needed to investigate the role of contributors’characteristics on their mapping *** study is intended to explore the potential socio-economic characteristics of contributors in highly contributed areas to have better insights about the latent patterns of involved individuals in a highly dynamic state of the most active country in OSM,Germany.A logistic regression model(LRM)is applied to discover the potential correlations between dependent and independent *** findings explain that the areas with high population density,middle level of education,high income,high rate of overnight stays,high number of foreigners,and residents aged from 18 to 69 are more likely to be involved in ***,the degree of dynamism in OSM is a function of proximity to built-up ***,concluding remarks concerning the independent variables and model sensitivity are presented.

关键词： OpenStreetMap spatial analysis collaborative mapping logistic regression analysis social science

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Finite Element Analysis of Attraction-Repulsion Chemotaxis *** II:Time Convergence,Error Analysis and Numerical Results

引用

Communications on Applied Mathematics and Computation 2022年第3期4卷 1057-1104页

作者： mohammed Homod Hashim Akil j.Harfash Department of Mathematics College of SciencesUniversity of BasrahBasrahIraq

In Hashim and Harfash(***.2021),using a finite element method,the attraction-repulsion chemotaxis model(P)in space is discretised;finite differences were used to do the same in ***,the existence of a global weak solution to the system(PΔt M)was demonstrated by means of analysis of the convergence of the fully discrete approximate problem(P h,Δt M,).Moreover,the functions{U,Z,V}were proved to represent a global weak solution to the system(PΔt M)by means of a passage to the limit,h→0 of the approximate *** paper’s purpose is to demonstrate that the solutions can be bounded,independent of *** analysis contained in this paper illustrates the idea of the existence of weak solutions to the model(P),that requires passing to the limits,Δt→0+and M→∞.The time stepΔt is subsequently linked to the cutoff parameter M>1 by positing a demand thatΔt=o(M−1),as M→∞,with the result that the cutoff parameter becomes the only parameter in the problem(PΔt M).The solutions can be bounded,independ-ent of M,with the use of special energy estimates,as demonstrated ***,these M-independent bounds on the relative entropy are employed with the purpose of deriving M-independent bounds on the ***,compactness arguments were utilised to explore the convergence of the finite element approximate *** conclu-sion was that a weak solution for(P)***,we introduced the error estimate and the implicit scheme was used to perform simulations in one and two space dimensions.

关键词： Finite element Chemotaxis Convergence Weak solution

来源：

维普期刊数据库

维普期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recent advances on flexible electrodes for Na-ion batteries and Li–S batteries

引用

journal of Energy Chemistry 2019年第5期28卷 15-44页

作者： mohammed-Ibrahim jamesh Department of Physics and Materials Science City University of Hong Kong Applied and Plasma Physics School of Physics (A28) University of Sydney CSIR-Central Electrochemical Research Institute-Chennai Unit CSIR Madras Complex

Flexible energy storage devices are essential for emerging flexible electronics. The existing state-of-the-art Li-ion batteries are slowly reaching their limitation in terms of cost and energy density. Hence, flexible Na-ion batteries (SIBs) with abundanee Na resources and Li-S batteries with high energy density become the alternative for the Li-ion batteries in future. This review summarizes the recent advances in the development of flexible electrode materials for SIBs with metallic matrix and carb on aceous matrix such as carb on nano-tubes, carbon nano-fiber, graphene, carbon cloth, carbon fiber cloth, and cotton textiles. Then, the potential prototype flexible full SIBs are discussed. Further, the recent progress in the development of flexible electrode materials for Li-S batteries based on carb on nano-fiber, carb on nano-tubes, graphene, and cotton textiles is reviewed. Moreover, the design strategies of suitable interlayer, separator, electrolyte, and electrodes to prevent the dissolution and shuttle effect of polysulfides in flexible Li-S batteries are provided. Finally some prospective investigation trends towards future research of flexible SIBs and Li-S batteries are also proposed and discussed. The scientific and engineering knowledge gained on flexible SIBs and Li-S batteries provides conceivable development for practical application in near future.

关键词： Na-ion batteries Lithium-sulfur batteries Flexible Free-standing High performance energy storage Long cycle life

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Adaptive neuro fuzzy inference system for predicting sub-daily Zenith Wet Delay

引用

Geodesy and Geodynamics 2022年第4期13卷 352-362页

作者： jareer mohammed Civil Engineering Department Wasit UniversityKutIraq

In recent years,the focus of tropospheric studies has evolved to GNSS meteorology and weather *** Zenith Wet Delay(ZWD),which might be assembled to the Integrated Water Vapour(IWV),is an essential component of the tropospheric *** predicted the ZWD with the required level of accuracy is crucial for weather *** scope of this study is to use the adaptive neural fuzzy inference system(ANFIS)to predict the ZWD for the following six-hour epoch based exclusively on the present the ZWD *** was developed and verified using 505 geographically and internationally distributed stations which were used for training and testing from 2008 to *** was assessed based on two ***,the correlation coefficient(R)values were found to be more than 0.8 in 98%of the stations,including those with highest and lowest latitudes,and the remaining 2% of stations located in coastal ***,the Root Mean Square Error(RMSE)values of the differences between the pre-dicted and the actual ZWD were considered to be the more important finding of the *** is,99.21% of the 505 stations had the RMSE values equal to or less than 3 cm,with only 4 stations having the RMSE values higher(0.2 mm)than 3 *** the results of this study achieved the required degree of ac-curacy from the predicted ZWD to be utilized in weather forecasting,they may also be beneficial for GNSS meteorology.

关键词： ANFIS ZWD Weather forecasting GNSS meteorology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

B-DRIVE:A blockchain based distributed IoT network for smart urban transportation

引用

Blockchain(Research and Applications) 2021年第4期2卷 37-48页

作者： mohammed Zia GIScience Chair Institute of GeographyUniversity of HeidelbergHeidelberg69120Germany

In this paper,I present B-DRIVE—a blockchain-based distributed IoT(Internet of Things)network for smart urban *** network is designed to connect a large fleet of IoT devices,installed on various vehicles and roadside infrastructures,to distributed data storage centers,called as Full-Nodes,to log and disseminate sensor generated *** connects devices from around the city to multiple Full-Nodes to log timestamped data into the *** sensors vary from GPS(Global Positioning System),air quality meter,gyrometer to speed cameras in order to facilitate efficient urban *** three identified hardware layers that comprise the network are the IoT layer,Storage layer,and User *** consist of Moving/Static-Nodes,Full-Nodes,and Smart devices,*** Moving/Static-Nodes are primarily made up of moving vehicles and road-side infrastructures,respectively,thus acting as various data ***,Full-Nodes and Smart devices are institutions and mobile phones,acting as data handler/disseminator and navigator/data visualizer,*** data,or data blocks,received by Full-Nodes get appended into Full and Running-Blockchain,meant for specific *** network is designed to be free from any block mining *** provides open access to anonymous sensor data to end-users,especially scientists,policy-makers and entrepreneurs,to develop innovative urban transportation *** is believed that a system like B-DRIVE,along with existing VANETs(Vehicular Ad-hoc NETworks),is capable of answering some of the current urban transportation issues around traffic congestion,navigation,and vehicle *** applications of blockchain data could vary from user activity mapping to VGI(volunteered geographic information)data quality *** identified limitations of the presented architecture are the low processing power of current IoT devices and the lack of urban IoT infrastructure.

关键词： Blockchain Open data Urban traffic Internet of Things Vehicle navigation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A statistical approach for enhancing security in VANETs with efficient rogue node detection using fog computing

引用

Digital Communications and Networks 2022年第5期8卷 814-824页

作者： Anirudh Paranjothi mohammed Atiquzzaman School of Computer Science University of OklahomaNormanOKUSA

Rogue nodes broadcasting false information in beacon messages may lead to catastrophic consequences in Vehicular Ad Hoc Networks(VANETs).Previous researchers used cryptography,trust scores,or past vehicle data to detect rogue nodes;however,these methods suffer from high processing delay,overhead,and False–Positive Rate(FPR).We propose herein Greenshield's traffic model–based fog computing scheme called Fog–based Rogue Node Detection(F–RouND),which dynamically utilizes the On–Board Units(OBUs)of all vehicles in the region for rogue node *** aim to reduce the data processing delays and FPR in detecting rogue nodes at high vehicle *** performance of the F–RouND framework was evaluated via *** show that the F–RouND framework ensures 45%lower processing delays,12%lower overhead,and 36%lower FPR at the urban scenario than the existing rogue node detection schemes even when the number of rogue nodes increases by up to 40%in the region.

关键词： VANETs Rogue nodes Fog computing Intrusion detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tuning the electronic structure of the earth-abundant electrocatalysts for oxygen evolution reaction(OER)to achieve efficient alkaline water splitting-A review

引用

journal of Energy Chemistry 2021年第5期30卷 299-342页

作者： mohammed-Ibrahim jamesh Moussab Harb Department of Physics and Materials Science City University of Hong KongTat Chee AvenueKowloonHong KongChina Applied and Plasma Physics School of Physics(A28)University of SydneySydneyNSW 2006Australia KAUST Catalysis Center(KCC) Physical Sciences and Engineering Division(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Tuning the electronic structure of the electrocatalysts for oxygen evolution reaction(OER)is a promising way to achieve efficient alkaline water splitting for clean energy production(H2).At first,this paper introduces the significance of the tuning of electronic structure,where modifying the electronic structure of the electrocatalysts could generate active sites having optimal adsorption energy with OER intermediates,and that could diminish the energy barrier for OER,and that could improve the activity for ***,this paper reviews the tuning of electronic structure along with catalytic performances,synthetic methodologies,chemical properties,and DFT calculations on various nanostructured earth-abundant electrocatalysts for OER in alkaline ***,this review discusses the tuning of the electronic structure of the several nanostructured earth-abundant electrocatalysts including oxide,(oxy)hydroxide,layered double hydroxide,alloy,metal phosphide/phosphate,nitride,sulfide,selenide,carbon containing materials,MOF,core-shell/hetero/hollow structured materials,and materials with vacancies/defects for OER in alkaline environment(including activity:overpotential(η)of ≤200 mV at10 m A cm^(-2);stability:≥100 h;durability:≥5000 cycles).Then,this review discusses the robust stability of the electrocatalysts for OER towards practical ***,this review discusses the in situ formation of thin layer on the catalyst surface during *** addition,this review discusses the influence of the adsorption energy of the OER intermediates on OER performance of the ***,this review summarizes the various promising strategies for tuning the electronic structure of the electrocatalysts to achieve enhanced performance for OER in alkaline environment.

关键词： OER electrocatalyst Electrochemical water splitting Earth abundant electrocatalyst Hydrogen energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabrication and characterization of gold nano particles for DNA biosensor applications

引用

Chinese Chemical Letters 2016年第5期27卷 801-806页

作者： Ahmed Mishaal mohammed Chemistry Department College of Science Anbar University Institutes of Nano Electronic Engineering University Malaysia Perlis

This research involves the preparation ofa biosensor using silicon oxide for biomedical applications, and its effective use for the detection of target DNA hybridization. An electrochemical DNA biosensor was successfully fabricated by using （3-aminopropyl） tri-ethoxysilane （APTES） as a linker molecule combined with gold nanoparticles （GNPs） on a thermally oxidized 5i02 thin film. The size of the GNPs was calculated by utilizing UV-vis data with an average calculated particle size within the range of 30 - 5 nm, and characterization by transmission electron microscopy （TEM） and atomic force microscopy （AFM）. The GNP-modified SiO2 thin films were electrically characterized through the measurement of capacitance, permittivity and conductivity using a low-cost dielectric analyzer. The capacitance, permittivity and conductivity profiles of the fabricated sensor clearly differentiated DNA immobilization and hybridization.

关键词： Gold nanoparticlesElectrochemical DNA hybridization Dielectric analyzer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

GraphFlow+:Exploiting Conversation Flow in Conversational Machine Comprehension with Graph Neural Networks

引用

Machine Intelligence Research 2024年第2期21卷 272-282页

作者： jing Hu Lingfei Wu Yu Chen Po Hu mohammed j.Zaki School of Computer Science Central China Normal UniversityWuhan 430079China Pinterest San Francisco 94016USA Meta Mountain View 94039USA Rensselaer Polytechnic Institute Troy 12180USA

The conversation machine comprehension(MC)task aims to answer questions in the multi-turn conversation for a single ***,recent approaches don’t exploit information from historical conversations effectively,which results in some references and ellipsis in the current question cannot be *** addition,these methods do not consider the rich semantic relationships between words when reasoning about the passage *** this paper,we propose a novel model GraphFlow+,which constructs a context graph for each conversation turn and uses a unique recurrent graph neural network(GNN)to model the temporal dependencies between the context graphs of each ***,we exploit three different ways to construct text graphs,including the dynamic graph,static graph,and hybrid graph that combines the *** experiments on CoQA,QuAC and DoQA show that the GraphFlow+model can outperform the state-of-the-art approaches.

关键词： Conversational machine comprehension(MC) reading comprehension question answering graph neural networks(GNNs) natural language processing(NLP)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：