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Heat transfer blockage in small scale combustion of polymers

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Science China(Technological Sciences) 2011年第10期54卷 2457-2467页

作者： JIANG FengHui QI HaiYing J. l. de ris m. m. KHAN Key laboratory for Thermal Science and Power Engineering of ministry of Education Tsinghua University Beijing 100084 China Fm Global Engineering & Research 1151 Boston-Providence Turnpike P.O. Box 9102 Norwood MA 02062 USA

Flame heat transfer blockage occurs as fuel vapors, soot and products of combustion near a burning fuel surface block much of the heat feedbacks （including external radiative heat flux） to the fuel surface of a burning object. Blockage clearly affects burning rates and heat release rates of fires. This needs to be included when calculating flame heat transfer in fire growth models. An understanding of bttrning of materials in small scale fires is of broad and vital importance for predicting their burning performance in large scale fires. The blockage phenomenon was clearly observed and quantitatively measured in experiments that took advantage of the unique capability of the Fire Propagation Apparatus （FPA） of being able to vary the ambient oxygen concentrations. An indirect measurement approach was established which provides an experimental understanding of the concept of the blockage. The measurements were further explained by a one-dimensional steady-state model of a diffusion flame, which focuses on the radiant absorption and emission by the gas-soot mixture of flames. The theoretical model provides a greater understanding of the fundamental knowledge of the blockage. The overall heat transfer blockage factor can be up to 0.3 -0.4 for PmmA and POm. The factor and its components are nearly independent of the external radiation, but increase as the ambient oxygen concentration rises. A comparison between experimental data and model prediction shows a good agreement.

关键词： polymer flame heat transfer blockage gas-soot mixture gas absorption and emission external radiant heat flux oxygen concentration

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Computing a Predictor Set Influence Zone through a multi-layer Genetic Network to Explore the Role of Estrogen in Breast Cancer

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Advances in Breast Cancer Research 2012年第3期1卷 21-29页

作者： leandro de Alima marcelo ris Junior Barrera maria m.Brentani Helena Brentani Instituto de matematica e Estatistica Universidade de Sao PauloSao PauloBrazil Hospital A.C.Camargo Sao PauloBrazil Departamento de Fisica e matematica da FFClRP Universidade de Sao PauloRibeirao PretoBrazil Faculdade de medicina Universidade de Sao PauloSao PauloBrazil

modeling inter-relationships of genes over a specific genetic network is one of the most challenging studies in systems biology. Among the families of models proposed one commonly used is the discrete stochastic, based on conditionally independent markov chains. In practice, this model is estimated from time sequential sampling, usually obtained by microarray experiments. In order to improve the accuracy of the estimation method, we can use biological knowledge. In this paper, we decided to apply this idea to study the role of estrogen in breast cancer proliferation. The n-influence zone of a set S of genes in a given multi-layer genetic network is a set l of genes regulated, directly or indirectly, by genes in S, after at most n-1 layers. In this manuscript we describe a new approach for computing the n-influence zone of S through the estimation of a multi-layer genetic network from gene expression time series, measured by microarrays, and biological knowledge. Using seed genes related to cell proliferation, our method was able to add to the third layer of the network other genes related to this biological function and validated in the literature. Using a set of genes directly influenced by estrogen, we could find a new role for cell adhesion genes estrogen dependent. Our pipeline is user-friendly and does not have high system requirements. We believe this paper could contribute to improve the data mining for biologists in microarray time series.

关键词： Genetic Regulatory Networks Estrogen Time-Course microarrays

Comparison of four non-alcoholic fatty liver disease detection scores in a Caucasian population

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World Journal of Hepatology 2020年第4期12卷 149-159页

作者： lars lind lars Johansson Hakan Ahlstrom Jan W Eriksson Anders larsson Ulf risérus Joel Kullberg Jan Oscarsson Department of medical Sciences UppsalaUniversityUppsala 75185Sweden Antaros medical AB BioVenture HubMolndal 43153Sweden Department of Surgical Sciences Uppsala UniversityUppsala 75185Sweden Department of Public Health and Caring Sciences Clinical Nutrition and metabolism Uppsala UniversityUppsala 75122Sweden Global medicines Development AstraZenecaMoIndal 43150Sweden

BACKGROUND Non-alcoholic fatty liver disease(NAFlD)is a common disorder,with an estimated prevalence ranging from 20%to 35%in the general *** scores based on easily measurable biochemical and clinical parameters,including the fatty liver index(FlI),hepatic steatosis index(HSI),lipid accumulation product(lAP),and NAFlD liver fat score(lFS),have been developed for the detection of ***,comparative information regarding the efficacy of these scores for predicting NAFlD in population-based samples comprising normal and high-risk individuals is *** To evaluate four NAFlD detection scores in two samples with different NAFlD *** NAFlD screening was performed in a population-based sample of 50-year-old individuals in Uppsala,Sweden[n=310;Prospective investigation of obesity,energy and metabolism(POEm)study]and a high-risk population comprising patients with a body mass index>25 kg/m2 and either high plasma triglycerides(≥1.7 mmol/l)or type 2 diabetes(n=310;EFFECT studies).NAFlD was defined as liver fat>5.5%using magnetic resonance imaging-proton density fat ***,HSI,lAP,and NAFlD lFS were assessed.A logistic regression model was used to evaluate the effectiveness of the different *** The prevalence of NAFlD was 23%in *** showed the highest receiver operating characteristic area under the curve(ROC AUC;0.82)and was significantly better than the lAP score(P=0.005 vs lAP,P=0.08 vs lFS,P=0.12 vs HSI)for detection of *** other three indices performed equally in POEm(0.77-0.78).The prevalence of NAFlD was 74%in EFFECT;lFS performed best(ROC AUC 0.80)in this *** ROC AUC for lFS(0.80)was significantly higher than that for FlI(P=0.0019)and lAP(P=0.0022),but not HSI(P=0.11).We performed a sensitivity analysis with stratification for the two high-risk subgroups(patients with diabetes or hypertriglyceridemia)from the EFFECT *** performed best in patients with *** major differences

关键词： Comparison EFFECT studies Fatty liver Non-alcoholic fatty liver disease Non-invasive indices Screening

1980～2000年拉脱维亚和里加的水质变化:希望与问题

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AmBIO－人类环境杂志 2001年第4期30卷 306-314页

作者： Tlis Juhna mris Klavin 林宝法卢列理工大学环境工程系和里加理工大学木土工程系拉脱维亚大学环境化学和生态分类学

本文研究了由于社会经济变革而发生的拉脱维亚环境水质的长期变化(内陆水域的化学成分、废水处理以及饮用水处理作法及质量)。为了确定在最近进入表层水域的污染排放物,特别是营养负荷减少之后所发生的变化,还研究了水的成分,影响水化... 详细信息

本文研究了由于社会经济变革而发生的拉脱维亚环境水质的长期变化(内陆水域的化学成分、废水处理以及饮用水处理作法及质量)。为了确定在最近进入表层水域的污染排放物,特别是营养负荷减少之后所发生的变化,还研究了水的成分,影响水化学的主要因素以及人为影响(废水负荷)。1991年后(拉脱维亚于1991年重新独立),主要由于来自点源和非点源的营养物负荷的减少以及在环境保护领域的巨大努力,内陆水质开始改善。但是饮用水处理方面的情况则不同,因为在1980年到2000年整个阶段饮用水处理的习惯作法也发生了变化。更严格的饮用水水质标准以及有关配水网中水质变化的新见识使得有必要进一步改进公共供水并把这一特殊的水问题列为拉脱维亚最优先考虑的事项之一。

关键词： 1980-2000年拉脱维亚里加水质变化水质评价

Spider odors induce stoichiometric changes in fruit fly Drosophila melanogaster

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Current Zoology 2021年第1期67卷 127-129页

作者： Ronalds KRAmS Tatjana KRAmA maris mUNKEVICS Sarah EICHlER David m.BUTlER linda DOBKEVICA Priit JOERS Jorge CONTRERAS-GARDUNO Janina DAUKSTE Indrikis A.KRAmS Plant Health Estonian University of Life SciencesTartu 51006Estonia Department of Biotechnology Daugavpils UniversityDaugavpils 5401Latvia Institute of Ecology and Earth Sciences University of TartuTartu 51010Estonia Department of Zoology and Animal Ecology Faculty of BiologyUniversity of LatviaRiga 1004Latvia Department of Biological Sciences Kent State UniversityOhioSalem 4460USA Department of Plant Sciences University of TennesseeKnoxville 37996-4561USA Department of Environmental Science Faculty of Geography and Earth SciencesUniversity of LatviaRiga 1004Latvia Department of General and microbial Biochemistry University of TartuTartu 51010Estonia Escuela Nacional de Estudios Superiores Unidad morelia Universidad Nacional Autonoma de MexicoMorelia 58190Mexico Institute of Food Safety Animal Health and Environment BIORRiga 1076Latvia Department of Psychology University of TennesseeKnoxville 37996-4561USA

Animal senses and signals are amazingly diverse,and the major modalities by which animals acquire sensory input from their environments are sound,light,vibration,and chemical *** mainly rely on visual,nociceptive,and olfactory cues to discriminate between rewards and *** has been shown that the visual and olfactory cues of predators substantially affect the adult phenotype in Drosophila melanogaster(Krams et al.2016),a prominent animal model for biological research.

关键词： melanogaster cues Drosophila

鲜食葡萄的二氧化硫薰蒸处理:果实和包装对二氧化硫的相对吸附、二氧化硫残留、葡萄腐败及漂白伤害

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中国果品研究 1989年第3期9卷 27-30,33页

作者： John m.Harvey C.max Har ris Thomas A.Hanke Preston l.Hasrtsell 张光弟

包装材料对薰蒸剂的吸附,早已被认为是确定薰蒸处理效果的一个重要因素。用二溴乙烯处理柑桔,溴甲烷或二氧化硫处理葡萄,都可表现出包装吸附对薰蒸效果的影响。

关键词：鲜食葡萄葡萄品种薰蒸二溴乙烯处理效果二氧化硫含量牛皮纸浆箱型结合型箱纸板

Enhanced helium ion irradiation tolerance in a Fe-Co-Ni-Cr-Al-Ti high-entropy alloy with l12 nanoparticles

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Journal of materials Science & Technology 2023年第12期143卷 169-177页

作者： Y.l.Zhao F.l.meng T.Yang J.H.luan S.F.liu G.m.Yeli W.T.lin W.H.liu X.J.liu C.T.liu J.J.Kai School of materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China School of materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of materials Science and Engineering Mechanical Behavior Division of Shenyang National Laboratory for Materials ScienceCity University of Hong KongHong KongChina Department of mechanical Engineering City University of Hong KongHong KongChina Institute of Nuclear&New Energy Technology Tsinghua UniversityBeijing 100084China

l12-strengthened high entropy alloys(HEAs)with excellent room and high-temperature mechanical prop-erties have been proposed as promising candidates as structural materials for advanced nuclear ***,knowledge about their radiation response is fairly *** the present work,a novel HEA with a high density of l12 nanoparticles was irradiated with He ion at 500°*** electron microscope(TEm)and atom probe tomography(APT)were employed to study the evolution of mi-crostructural stability and radiation-induced *** to the single-phase FeCoNiCr HEA,the main microstructural features were numerous large faulted dislocation loops and helium *** the irradiation resistance of the present l12-strengthened HEA is much improved in terms of reduced bubble size,which could be attributed to the considerable He trapping efficiency of the coherent pre-cipitate/matrix interface and the enhanced capability of the interface for damage elimination when the matrix channel width is *** analysis revealed that an inverse-Kirkendall-mechanism-dominated radiation-induced segregation(ris)occurs around bubbles,where a significant Co enrichment and Ni de-pletion can be clearly *** addition,the competing dynamics of ballistic mixing and elemental clustering that raised from the irradiation-enhanced diffusion in a highly supersaturated matrix,along with the low precipitation nucleation barrier due to the small lattice misfit,lead to a dynamical pre-cipitation dissolution and re-precipitation appears under *** a promising phenomenon is expected to promote a potential self-healing effect and could in turn provide a sustainable irradiation tolerance over the operational lifetime of a reactor.

关键词： l12 nanoparticles High-entropy alloy Helium bubble Phase stability Radiation-induced segregation

CD300a inhibits CD16-mediated NK cell effector functions in HIV-1-infected patients

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Cellular & molecular Immunology 2019年第12期16卷 940-942页

作者： Joana Vitallé Iñigo Terrén Ane Orrantia Raquel Pérez-Garay Francesc Vidal JoséA.Iribarren Carmen Rodríguez Ana m.lópez lirola Enrique Bernal Olatz Zenarruzabeitia Francisco Borrego Immunopathology Group Biocruces Bizkaia Health Research InstituteBarakaldoSpain Hospital Universitari de Tarragona Joan XXIII IISPVUniversitat Rovira i VirgiliTarragonaSpain Servicio de Enfermedades Infecciosas Hospital Universitario DonostiaInstituto de Investigación Sanitaria BiodonostiaDonostia-San SebastiánSpain Centro Sanitario Sandoval Hospital Clínico San CarlosInstituto de Investigación Sanitaria San CarlosMadridSpain Hospital Universitario de Canarias Santa Cruz de TenerifeSpain Department of Clinical medicine Universidad de Murcia and Hospital General Universitario Reina SofíaMurciaSpain Ikerbasque Basque Foundation for ScienceBilbaoSpain

Natural killer(NK)cell-mediated antibody-dependent cellular cytotoxicity(ADCC)through CD16 plays a critical role in antihuman immunodeficiency virus(HIV)responses.1–3 CD300a is a surface receptor highly expressed on NK cells that has the capacity to inhibit NK cell-mediated cytotoxicity in healthy donors.4 The CD300a molecule has been related to several viral infections and is able to diminish the NK cell killing of pseudorabies-infected cells through interactions with its ligands phosphatidylserine and phosphatidylethanolamine.5 In addition,CD300a expression on B and CD4+T lymphocytes is altered during HIV-1 infection,and combined antiretroviral therapy(cART)does not restore nonpathological expression levels.5,6 However,the expression and function of CD300a on NK cells during HIV-1 infection is still *** have determined the surface expression of CD300a on different NK cell subsets and the capacity of this receptor to inhibit CD16-induced NK cell effector functions in healthy and HIV-1 infected individuals.

关键词： CD16 CD30 ADCC

液晶智能超表面辅助的室内可见光通信系统优化设计

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工程科学学报 2025年第2期47卷 307-314页

作者：余礼苏吕欣欣钟润张鸣莉王正海王玉皞南昌大学信息工程学院南昌330031 南昌大学先进信号处理与智能通信江西省重点实验室南昌330031

可见光通信(VlC)作为6G的候选技术,具备广阔的免许可频谱、更高的安全级别、避免射频干扰等诸多优势,这些特点使得VlC成为射频通信的有效补充方案.本文设计并优化了一种基于功率域非正交多址(PD-NOmA)技术的室内VlC下行链路通信系统,该... 详细信息

可见光通信(VlC)作为6G的候选技术,具备广阔的免许可频谱、更高的安全级别、避免射频干扰等诸多优势,这些特点使得VlC成为射频通信的有效补充方案.本文设计并优化了一种基于功率域非正交多址(PD-NOmA)技术的室内VlC下行链路通信系统,该系统中包括一块位于信道中间的同时透射和反射智能超表面(STAR-ris)和一个基于液晶智能超表面(lC-ris)的接收器.为了评估所设计的系统性能,本文提出了一个和速率最大化问题,并考虑了实际情况下发射机和接收机之间的视距(loS)路径存在非用户遮挡因素.由于所提出优化问题的非凸性,首先使用二次变换将目标函数转化为一个分式规划(FP)问题,其次采用分步优化算法和凸优化(CVX)工具来获得可行解.此外,本文分析了发光二极管(lED)的数量、入射光波长以及液晶折射率对室内可见光通信系统和速率的影响.数值仿真结果表明,在能量分裂(ES)操作协议下,STAR-ris和lC-ris联合辅助的室内VlC系统的和速率明显高于仅有反射智能超表面(ris)和无lC-ris的VlC系统.lED灯数量、入射光波长以及液晶(lC)折射率均会在一定程度上对系统性能产生影响.这些研究结果为室内可见光通信系统的设计和优化提供了重要参考.

关键词：可见光通信同时透射和反射智能超表面液晶智能超表面功率域非正交多址分式规划