检索结果-南通市图书馆

Detection of internal crack growth in polyethylene pipe using guided wave ultrasonic testing

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 319-329页

作者： jay Kumar Shah Hao wang Said El-Hawwat Centre of Advanced Infrastructure and Transportation RutgersThe State University of New JerseyNJ 08854USA Department of Civil and Environmental Engineering RutgersThe State University of New JerseyNJ 08854USA

Despite the success of guided wave ultrasonic inspection for internal defect detection in steel pipes,its application on polyethylene(PE)pipe remains relatively *** growth of internal cracks in PE pipe severely affects its pressure-holding capacity,hence the early detection of internal cracks is crucial for effective pipeline maintenance *** study extends the scope of guided wave-based ultrasonic testing to detect the growth of internal cracks in a natural gas distribution PE *** experiments and a finite element model were planned to study the wave-crack interaction at different stages of axially oriented internal crack growth with a piezoceramic transducer-based setup arranged in a pitch-catch *** dispersion analysis supplemented with preliminary experiments was performed to isolate the optimal inspection frequency,leading to the selection of the T(0,1)mode at 50-kHz for the investigation.A transmission index based on the energy of the T(0,1)mode was developed to trace the extent of simulated crack *** findings revealed an inverse linear correlation between the transmission index and the crack depth for crack growth beyond 20%crack depth.

关键词： polyethylene pipes internal cracks guided wave ultrasonic testing torsional modes finite element modeling

Carbene chemistry for unnatural biosynthesis

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2024年第1期67卷 204-207页

作者： Jing Huang jay D.Keasling Department of Chemical and Biomolecular Engineering University of CaliforniaBerkeley 94720USA Joint BioEnergy Institute Lawrence Berkeley National LaboratoryEmeryville 94608USA Biological Systems and Engineering Division Lawrence Berkeley National LaboratoryBerkeley 94720USA Novo Nordisk Foundation Center for Biosustainability Technical University of DenmarkKongens Lyngby 2800Denmark Department of Bioengineering University of CaliforniaBerkeley 94720USA Synthetic Biochemistry Center Institute for Synthetic BiologyShenzhen Institutes for Advanced TechnologiesShenzhen 518055China

Previously,chemists working in synthesis were jealous of biologists since the enzymes found in nature usually exhibited great catalytic properties(e.g.,high catalytic efficiency,excellent selectivity such as substrate selectivity,regioselectivity and stereoselectivity).However,biological systems lack many counterparts of reactions widely used in chemical synthesis.

关键词： synthesis selectivity catalytic

Message from the Guest Editors of the Special Issue on Precise Orbit Determination

在线全文

学校读者我要写书评

暂无评论

Astrodynamics 2024年第3期8卷 323-323页

作者： Xiyun Hou jay w.McMahon School of Astronomy and Space Science Nanjing UniversityNanjingChina Ann and H.J.Smead Department of Aerospace Engineering Sciences the University of Colorado BoulderBoulderColorado 80309USA

Dear authors and readers,Orbit determination is an old topic in celestial mechanics and *** originates from the need to determine the position and speed of natural or artificial objects in space through ground-station measurements,along with the need to estimate parameters involved in dynamics and *** has been the key to many important space applications.

关键词： dynamics. observations. Orbit

Barriers and motivators to the adoption of electric vehicles:A global review

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

Green Energy and Intelligent Transportation 2024年第2期3卷 79-88页

作者： Apurva Pamidimukkala Sharareh Kermanshachi jay Michael Rosenberger Greg Hladik Assistant Professor of Research Department of Civil EngineeringUniversity of Texas at ArlingtonArlingtonTX 76019USA Professor Department of Civil EngineeringUniversity of Texas at ArlingtonArlingtonTX 76019USA Department of Industrial Engineering University of Texas at Arlington(UTA)Woolf HallArlingtonTX 76019USA Executive Director Auxiliary Services University of Texas at Arlington710 S.Davis DriveArlingtonTX76019USA

Electric vehicles(EVs)have the potential to mitigate the severity of significant concerns including environmental pollution and reliance on fossil fuels;however,despite strong governmental promotional efforts,their market penetration is still at the nascent *** paper empirically investigates the factors that affect the consumers'intention to adopt EVs by conducting an exhaustive literature *** initial search resulted in 1,690 publications,but after a thorough exclusion process,537 articles were deemed relevant and were sorted by source,publication year,country of origin,data collection method,and research *** results revealed the influential factors over individuals’desire to adopt an EV were categorized into four main types(contextual,situational,demographic,and psychological);situational factors,that can act as both barriers and motivators,had the most influencing *** most cited barriers to adoption of EVs were found to be the lack of charging stations availability and their limited driving *** most cited motivators to EV adoption were found to be reduction in air pollution and the availability of policy *** findings of this study may guide policymakers in formulating effective transportation and energy policies,as well as provide guidance to those who are responsible for designing EVs that fit the needs and demands of potential consumers.

关键词： Electric vehicles Sustainability Adoption Policies Barriers Motivators

Microglial dysfunction and genetic risk for neurodegenerative disease

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

Neural Regeneration Research 2025年第5期20卷 1401-1402页

作者： Debra S.MacDonald jay Penney Department of Biomedical Sciences AVCUniversity of Prince Edward IslandCharlottetownPECanada

Neurodegenerative disorders such as Alzheimer's and Parkinson's diseases a re increasing in prevalence as world populations *** tremendous progress has been made,our understanding of the mechanisms that underlie the development of these diseases remains far from com *** troubling,despite the growing emotional and financial toll being to ken by neurodegenerative disorders,existing treatment options are limited almost exclusively to those that help manage symptoms but that lack the ability to alter the progression of the disease(Liu et al.,2022).

关键词： degenerative diseases

《第28届急性疾病质量倡议工作组共识报告:脓毒症相关急性肾损伤》解读

在线全文

学校读者我要写书评

暂无评论

中华肾脏病杂志 2024年第3期40卷 237-244页

作者：刘彩虹 jay Koyner 赵宇亮付平四川大学华西医院肾脏内科、四川大学华西医院肾脏病研究所成都610041 芝加哥大学内科学系芝加哥60607

脓毒症相关急性肾损伤(sepsis associated acute kidney injury,SA-AKI)被定义为脓毒症背景下急性肾损伤(acute kidney injury,AKI)的存在。在遗传易感性的背景下,脓毒症可通过多种机制导致SA-AKI的发生,基于病理生理机制的差异,SA-AKI... 详细信息

脓毒症相关急性肾损伤(sepsis associated acute kidney injury,SA-AKI)被定义为脓毒症背景下急性肾损伤(acute kidney injury,AKI)的存在。在遗传易感性的背景下,脓毒症可通过多种机制导致SA-AKI的发生,基于病理生理机制的差异,SA-AKI归属于不同的“内型”,且表现为不同的“亚表型”。生物标志物和预测模型的结合具备早期识别AKI高风险患者和明确SA-AKI“内型”的潜力。容量复苏及血液净化是SA-AKI治疗的优化策略。此外,基于儿童的SA-AKI临床研究值得期待。

关键词：脓毒症急性肾损伤诊断急性疾病质量倡议专家共识

Clinical studies in COVID-related olfactory disorders:Review of an institutional experience

在线全文

学校读者我要写书评

暂无评论

world Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 129-136页

作者： Theresa Tharakan Dorina Kallogjeri jay F.Piccirillo Department of Otolaryngology-Head and Neck Surgery Clinical Outcomes Research OfficeSchool of MedicineWashington University in St LouisSt LouisMissouriUSA

Objective:To share a single institutional experience with clinical research on COVID-related olfactory dysfunction(OD).Data Source/Method:Narrative review of published original data and ongoing clinical trials on COVID-related OD at washington University from 2020 to ***:There were three new diagnostic-/patient-reported outcome measures developed and *** report five clinical trials of interventions for COVID-related olfactory disorders:combined Visual-Olfactory Training(VOLT)with patient-preferred scents versus standard olfactory training(VOLT trial),oral gabapentin versus placebo(Gabapentin for the Relief of Acquired Chemosensory Experience trial),nasal theophylline irrigations versus placebo(Smell Changes and Efficacy of Nasal Theophylline trial),stellate ganglion block(single-arm),and mindfulness-based stress reduction(MBSR)versus lifestyle intervention(MBSR trial).Conclusions:Initial intervention trials for COVID-related OD have shown potential for improving subjective and objective olfactory ***,there remains no gold standard treatment that definitively outperforms placebo in controlled ***,continued investigation of novel therapeutic strategies for COVID-related OD is necessary to maximize olfactory outcomes for affected patients.

关键词： chemosensory disorders COVID olfactory dysfunction

Neuropsychological detection and prediction using machine learning algorithms:a comprehensive review

在线全文

学校读者我要写书评

暂无评论

Intelligent Medicine 2024年第3期4卷 177-187页

作者： Manan Shah Ananya Shandilya Kirtan Patel Manya Mehta jay Sanghavi Aum Pandya Department of Chemical Engineering School of Energy TechnologyPandit Deendayal Energy UniversityGandhinagarGujaratIndia walt whitman High School BethesdaMarylandUSA St.Kabir School AhmedabadGujaratIndia Anand Niketan School AhmedabadGujaratIndia Department of Computer Engineering School of TechnologyPandit Deendayal Energy UniversityGandhinagarGujaratIndia

Neuropsychological disorders(e.g.,dementia,epilepsy,brain cancer,autism,stroke,and multiple sclerosis)ad-versely affect the quality of life of patients and their families;moreover,in some instances,they may lead to loss of *** primary aim was to evaluate and compare the use of machine learning in neuropsychological research in contrast to traditional approaches such as through case *** was achieved by referring to earlier studies on this *** article presented the use of support vector machines(SVMs)and convolu-tional neural networks(CNN)for detecting and predicting neuropsychological diseases,such as dementia and Alzheimer’s *** in using these models include data availability,quality,variability,model inter-pretability,and *** findings have demonstrated the potential of these models in this *** has been shown that SVM models are robust and efficient in processing and classifying data,particularly in neuroimaging applications,such as magnetic resonance imaging(MRI).CNNs have excelled in handling visual input;thus,they have been used in neuroimaging segregation,recognition,and classification,with applications in brain tumor segmentation,radiation therapy,robotic neurosurgery,and disease *** research will explore asymmetric differences among left-and right-handed patients,incorporate longitudinal studies,and utilize larger sample *** use of machine learning models has the potential to revolutionize the diagnosis and treatment of neuropsychological diseases,allowing for early detection and *** approach could offer significant advantages to healthcare,such as cost-effective diagnosis and treatment,to help save lives and preserve the quality of life of patients.

关键词： Machine learning Neuropsychological Support vector machine Convolution neural network

Uncovering the dominant contribution of intermediate volatility compounds in secondary organic aerosol formation from biomass-burning emissions

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

National Science Review 2024年第3期11卷 150-158页

作者： Kun Li Jun Zhang David M.Bell Tiantian wang Houssni Lamkaddam Tianqu Cui Lu Qi Mihnea Surdu Dongyu wang Lin Du Imad El Haddad jay G.Slowik Andre S.H.Prevot Environment Research Institute Shandong University Laboratory of Atmospheric Chemistry Paul Scherrer Institute

Organic vapors from biomass burning are a major source of secondary organic aerosols(SOAs). Previous smog chamber studies found that the SOA contributors in biomass-burning emissions are mainly volatile organic compounds(VOCs). while intermediate volatility organic compounds(IVOCs) are efficient SOA precursors and contribute a considerable fraction of biomass-burning emissions, their contribution to SOA formation has not been directly observed. Here, by deploying a newly-developed oxidation flow reactor to study SOA formation from wood burning, we find that IVOCs can contribute ～70% of the formed SOA, i.e.>2 times more than VOCs. This previously missing SOA fraction is interpreted to be due to the high wall losses of semi-volatile oxidation products of IVOCs in smog chambers. The finding in this study reveals that SOA production from biomass burning is much higher than previously thought, and highlights the urgent need for more research on the IVOCs from biomass burning and potentially other emission sources.

关键词： atmospheric chemistry biomass burning secondary organic aerosol intermediate volatility organic compounds