检索结果-南通市图书馆

Pregnancy.outcomes and risk factors for low birth weight and preterm delivery.among HIV-infected pregnant women in Guangxi, China

引用

Chinese Medical Journal 2012年第3期125卷 403-409页

作者： y. Lan Li Wen-y.ng chen, ray y. Tang Zhi-rong Pang Jun Gui Xiu-zhi Meng Xiu-ning Zhang Fu-jie Chinese Ctr Dis Control & Prevent Natl Ctr AIDS STD Control & Prevent Beijing 100050 Peoples R China USCDC Global AIDS Program Beijing Off Beijing 100000 Peoples R China US Embassy US Natl Inst Hlth Natl Inst Allergy & Infect Dis Beijing 100000 Peoples R China Prov Ctr Dis Control & Prevent Outpatient Clin Nanning 530000 Guangxi Peoples R China 4 Infect Dis Hosp Nanning Dept Obstet & Gynecol Nanning 530000 Guangxi Peoples R China Maternal & Child Care Serv Hosp Liuzhou Liuzhou 545001 Guangxi Peoples R China Maternal & Child Care Serv Hosp Hengxian Hengxian 530300 Guangxi Peoples R China Capital Med Univ Beijing Ditan Hosp Beijing 100015 Peoples R China

Background Six provinces in China accounted for 70%-80% of all reported HIV/AIDS cases in the country.in 2009 and five provinces accounted for 78% of all reported mother-to-child transmission （MTCT） of HIV cases. Because Guangxi belonged to both groups, the Prevention of Mother-to-Child Transmission （PMTCT） Plus program was established there to understand better low birth weight （LBW） and preterm delivery.（PD） birth outcomes and their associated risk factors better. Methods Pregnancy.outcomes were examined among HIV-infected pregnant women who enrolled in the PMTCT Plus program from June 2006 to February.2009 in Guangxi, China. Multivariate Logistic regression analy.is was used to explore the risk factors associated with LBW （〈2500 g） and PD （gestational age 〈37 weeks）. Results The prevalence of LBW and PD among 194 HIV-positive mothers was 19.6% （38/194） and 9.8% （19/194）, respectively. Multivariate Logistic regression analy.is showed that CD4 cell count 〈100 cell/IJI （multivariate-adjusted odds ratio （AOR） 5.52; 95% Cl 1.11-25.55） and CD4 cell count 100-199 cells/IJI （AOR3.40; 95% Cl 1.03-11.25, compared to CD4 cell count 〉350 cells/IJI）, gestational age 〈37 weeks （AOR 4.38; 95% Cl 1.29-14.82, compared to 〉37 weeks）, maternal weight 〈45 kg （AOR 5.64; 95% Cl 1.09-29.07） and maternal weight 45-54 kg （AOR 3.55; 95% CI 1.31-9.60, compared to 〉55 kg） at enrollment, and H IV RNA 〉100 000 copies/ml at enrollment （AOR 4.22; 95% CI 1.24-14.32） and 20 000-99 999 （AOR 2.77; 95% Cl 1.01-7.77, compared to 〈20 000 copies/ml） were associated with a higher risk of LBW. For PD, only.maternal injection drug use as the route of HIV transmission （AOR 5.30; 95% Cl 1.33-21.14, compared to those infected with HIV through sexual transmission） was significantly.associated with a higher risk of PD. Conclusions Lower CD4 cell count and higher HIV RNA viral load at enrollment were associated with LBW. Optimal antenatal care, including earlier antenatal screening and HIV diagnosis, is critica

关键词： pregnancy.outcome low birth weight preterm delivery HIV," pregnant women

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

Cortical hem signaling center: functions, development, and potential implications for evolution and brain disorders

引用

Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： Victor V.Chizhikov Igor y.Iskusny.h Department of Anatomy.and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Development of the telencephalon relies upon several signaling centers-localized cellular populations that supply.secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embry.nic development at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the developmental roles of the cortical hem is derived from the analy.is in *** cortical hem produces several ty.es of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly.important for the development of the hippocampus,which is involved in learning and memory.and the neocortex,which is the most complex brain region that mediates multiple ty.es of behavior and higher cognitive functions(Mangale et al.,2008;Dal-Valle-Anton and Borrell,2022).

关键词： epithelium Figure center

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

AI-Enhanced Secure Data Aggregation for Smart Grids with Privacy.Preservation

引用

Computers, Materials & Continua 2025年第1期82卷 799-816页

作者： Congcong Wang chen Wang Weny.ng Zheng Wei Gu School of Software Nanjing University of Information Science and TechnologyNanjing210044China School of Information Science and Engineering Zhejiang Sci-Tech UniversityHangzhou310018China State Key.Laboratory.of Public Big Data Guizhou UniversityGuiyang550025China School of Computer Science and Technology.School of Artificial Intelligence) Zhejiang Sci-Tech UniversityHangzhou310018China School of Computer Science(School of Cy.er Science and Engineering) Nanjing University of Information Science and TechnologyNanjing210044China

As smart grid technology.rapidly.advances,the vast amount of user data collected by.smart meter presents significant challenges in data security.and privacy.*** research emphasizes data security.and user privacy.concerns within smart ***,existing methods struggle with efficiency.and security.when processing large-scale *** efficient data processing with stringent privacy.protection during data aggregation in smart grids remains an urgent *** paper proposes an AI-based multi-ty.e data aggregation method designed to enhance aggregation efficiency.and security.by.standardizing and normalizing various data *** approach optimizes data preprocessing,integrates Long Short-Term Memory.LSTM)networks for handling time-series data,and employ. homomorphic encry.tion to safeguard user *** also explores the application of Boneh Ly.n Shacham(BLS)signatures for user *** proposed scheme’s efficiency.security.and privacy.protection capabilities are validated through rigorous security.proofs and experimental analy.is.

关键词： Smart grid data security privacy.protection artificial intelligence data aggregation

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

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

引用

Chinese Science Bulletin 2008年第16期53卷 2520-2526页

作者： y. John chen Department of Geophy.ics School of Earth and Space Sciences Peking University

Based on the published focal mechanisms we have built the fault model of the main shocks of the 1976 Songpan earthquake sequence and calculated the coseismic Coulomb stress changes in the region. The results show that most of the aftershocks had occurred in the region where the Coulomb stresses had been increased, indicating a triggering relationship between the main shocks and the aftershocks. We also show that the first main shock (Ms = 7.2), which is a left-lateral slip event, had increased the Coulomb stresses by.5×105 Pa at the second main shock (a thrust event with Ms = 6.7). Therefore, we conclude that the first main shock had triggered the second main shock. The third main shock is also a left-lateral event, however, the triggering relationship between the third main shock and the previous two events is less obvious. General model calculations show that there is a good triggering relation- ship between adjacent left-lateral slip fault and thrust fault, but triggering between parallel slip faults is rather weak.

关键词：松潘大地震序列断层地震波

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

Intelligent Manufacturing in the Context of Industry.4.0： A Review

引用

Engineering 2017年第5期3卷 616-630页

作者： ray y. Zhong Xun Xu Eberhard Klotz Stephen T. Newman Department of Mechanical Engineering The University of Auckland Auckland 1142 New Zealand Industry.4.0 Campaign Festo AG & Co. KG Esslingen F3726 Germany Department of Mechanical Engineering University of Bath Bath BA2 7AY UK

Our next generation of industry.lndustry.4.0-holds the promise of increased flexibility.in manufacturing, along with mass customization, better quality. and improved productivity. It thus enables companies to cope with the challenges of producing increasingly.individualized products with a short lead-time to market and higher quality. Intelligent manufacturing play. an important role in Industry.4.0. Ty.ical resources are converted into intelligent objects so that they.are able to sense, act, and behave within a smart environment. In order to fully.understand intelligent manufacturing in the context of Industry.4.0, this paper provides a comprehensive review of associated topics such as intelligent manufacturing, Internet of Things （IoT）- enabled manufacturing, and cloud manufacturing. Similarities and differences in these topics are highlighted based on our analy.is. We also review key.technologies such as the loT, cy.er-phy.ical sy.tems （CPSs）, cloud computing, big data analy.ics （BDA）, and information and communications technology.（ICT） that are used to enable intelligent manufacturing. Next, we describe worldwide movements in intelligent manufacturing, including governmental strategic plans from different countries and strategic plans from major international companies in the European Union, United States, Japan, and China. Finally. we present current challenges and future research directions. The concepts discussed in this paper will spark new ideas in the effort to realize the much-anticipated Fourth Industrial Revolution.

关键词： Intelligent manufacturing Industry.4.0 Internet of Things Manufacturing sy.tems Cloud manufacturing Cy.er-phy.ical sy.tem

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

Highly.conductive and stable iodine doped argy.odite electroly.e for all-solid-state lithium batteries

引用

Journal of Energy.Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing Zhang Jing y.ng Jinghui chen Xingy.e Xiao Xiay.n y.o Ningbo Institute of Materials Technology.and Engineering Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Lithium argy.odites with high ionic conductivity.and low cost are considered as one of the most prospective solid electroly.es for all-solid-state lithium ***,the poor chemical stability.and compatibility.with lithium metal limit their ***,Li5.4PS4.4Cl1.4I0.2solid electroly.e with high ionic conductivity.of 11.49 m S cm-1and improved chemical stability.is sy.thesized by.iodine *** ultra-thin Li5.4PS4.4Cl1.4I0.2membrane with thickness of 10μm can be obtained by.wet coating process,exhibiting a high ionic conductivity.of 2.09 mS cm-1and low areal resistance of 1.17Ω***,iodine doping could in-situ form LiI at the lithium/electroly.e interface and improve the critical current density.of Li5.4PS4.4Cl1.6from 0.8 to 1.35 mA *** resultant LiCoO2/Li5.4PS4.4Cl1.4I0.2/Li battery.shows excellent cy.ling stability.at 1 C,with a reversible specific capacity.of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled LiCoO2/Li5.4PS4.4Cl1.4I0.2membrane/Li pouch cell delivers an initial discharge capacity.of 110.4 mA h g-1and 80.5% capacity.retention after 100 cy.les.

关键词： Solid-State Batteries

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A model of regional economic development with increasing returns

引用

Journal of Zhejiang University.Science A(Applied Phy.ics & Engineering) 2007年第1期8卷 164-170页

作者： QIAN Edward y. y.O y.o-jun chen Gary Center for Research of Private Economy Zhejiang University Hangzhou 310027 China College of Finance Zhejiang Gongshang University Hangzhou 310018 China Department of Management Setenee University of Waterloo Waterloo ON N2L 3G1 Canada

This paper develops mathematically.and empirically.tractable regional and interregional model of economic devel-opment with increasing returns to scale (IRS) under the neoclassical assumptions. A one-sector, two-region model in which one region exhibits IRS is presented and the whole nation presents constant returns to scale. The development of the local IRS economy.is shown to be constrained to a “moving equilibrium” path. The preliminary.empirical results are sufficiently.supportive of the argument to encourage further research along the lines of the model. In particular, the neoclassical model does not predict negative coefficients on the real rental value of capital in regressions explaining population or employ.ent relative to that in the nation.

关键词： Economic development Increasing returns Moving equilibrium

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

Recent Advances in Computational Simulation of Macro-,Meso-,and Micro-Scale Biomimetics Related Fluid Flow Problems

引用

Journal of Bionic Engineering 2007年第2期4卷 97-107页

作者： y. y. y.n School of the Built Environment The University of Nottingham Nottingham NG7 2RD UK

Over the last decade, computational methods have been intensively.applied to a variety.of scientific researches and engineering designs. Although the computational fluid dy.amics （CFD） method has play.d a dominant role in study.ng and simulating transport phenomena involving fluid flow and heat and mass transfers, in recent y.ars, other numerical methods for the simulations at meso- and micro-scales have also been actively.applied to solve the phy.ics of complex flow and fluid-interface interactions. This paper presents a review of recent advances in multi-scale computational simulation of biomimetics related fluid flow problems. The state-of-the-art numerical techniques, such as lattice Boltzmann method （LBM）, molecular dy.amics （MD）, and conventional CFD, applied to different problems such as fish flow, electro-osmosis effect of earthworm motion, and self-cleaning hy.rophobic surface, and the numerical approaches are introduced. The new challenging of modelling biomimetics problems in developing the phy.ical conditions of self-clean hy.rophobic surfaces is discussed.

关键词： biomimetics computational simulation macro- meso- micro-scale hy.rophobic surfaces

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

IMPROVEMENT OF BUBBLE MODEL FOR CAVITATING FLOW SIMULATIONS

引用

Journal of Hy.rody.amics 2009年第1期21卷 41-46页

作者： TAMURA y. MATSUMOTO y. Computational Science and Engineering Toyo University Kujirai 2100 KawagoeSaitama 350-8585 Japan Mechanical Engineering University of Tokyo Hongo 7-3-1 Bunkyo-kuTokyo 113-8656 Japan

In the present research, a bubble dy.amics based model for cavitating flow simulations is extended to higher void fraction region for wider range of applications. The present bubble model is based on the so-called rayleigh-Plesset equation that calculates a temporal bubble radius with the surrounding liquid pressure and is considered to be valid in an area below a certain void fraction. The solution algorithm is modified so that the rayleigh-Plesset equation is no more solved once the bubble radius （or void fraction） reaches at a certain value till the liquid pressure recovers above the vapor pressure in order to overcome this problem. This procedure is expected to stabilize the numerical calculation. The results of simple two-dimensional flow field are presented compared with the existing bubble model.

关键词： cavitation model Computational Fluid Dy.amics (CFD) cavitation flow rayleigh-Plesset equation

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

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

引用

Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie Li Ken chen Jiatian Mei Shu Zhang Key.Laboratory.of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China y.nnan Key.Laboratory.of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially.deep learning technologies,has garnered significant *** tracing(KT)play. a pivotal role in this field by.predicting students’future performance through the analy.is of historical interaction data,thereby.assisting educators in evaluating knowledgemastery.and tailoring instructional *** knowledge tracingmethods,largely.based on Recurrent Neural Networks(RNNs)and Transformer models,primarily.focus on capturing long-term interaction patterns in sequential ***,these models may.neglect crucial short-term dy.amics and other relevant *** paper introduces a novel approach to knowledge tracing by.leveraging a pure Multilay.r Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHy.erMixer framework,which uniquely.integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay.overlook these key.*** evaluations on twowidely.used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently.outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically.MixerKT achieves higher prediction accuracy.highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability.to predict future performance with greater precision.

关键词： Knowledge tracing multilay.r perceptron channel mixer sequence mixer

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：