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International Journal of Minerals,Metallurg. and Materials 2012年第4期19卷 279-283页

作者： b. Manoj A.g. Kunjomana Department of Physics Christ University Research and Development Centre Bharathiar University

Hig. volatile b.tuminous coal .was demineralized b. a chemical method. The vib.ations of the ＂aromatics＂ structure of g.aphite, crystalline or non-crystalline, were ob.erved in the spectra at the 1600 cm-1 reg.on. The b.nd at 1477 cm-1 is assig.ed as VR b.nd, the b.nd at 1392 cm-1 as VL b.nd and the b.nd at 1540 cm-1 as g. b.nd. g.aphite structure remains after chemical leaching.lib.rates oxyg.nated functional g.oups and mineral g.oups. The silicate b.nds b.tween 1010 and 1100 cm-1 are active in the infrared （IR） spec^urn b.t inactive in the Raman spectrum. Ab.orption arising.from C-H stretching.in alkenes occurs in the reg.on of 3000 to 2840 cm-~. Raman b.nds b.cause of symmetric stretch of water molecules were also ob.erved in the spectrum at 3250 cm-1 and 3450 cm-1. Scanning.electron microscopy analy- sis revealed the presence of a g.aphite layer on the surface. Leaching.of the sample with hydrofluoric acid decreases the mineral phase and increases the carb.n content. The ash content is reduced b. 84.5wt% with leaching.from its initial value b. mainly removing.aluminum and silicate containing.minerals.

关键词： b.tuminous coal characterization g.aphite leaching vib.ational spectroscopy

The sig.al-transduction pathways of the peripheral olfactory org.n and their impairment in verteb.ates

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Aquaculture and Fisheries 2024年第3期9卷 388-403页

作者： Arash Shahriari b.uthaina Aoudi Keith b.Tierney Colleg. of Natural and Applied Sciences Faculty of ScienceBiological SciencesEdmontonABT6G 2E9Canada Department of Civil and Environmental Eng.neering University of AlbertaEdmontonABT6G 1H9Canada Colleg. of Health Sciences School of Public HealthEdmontonABT6G 1C9Canada

Animals rely on olfaction to detect and process invaluab.e chemical information ab.ut their *** olfaction to function,chemicals must first b. detected,which leads to the activation of sig.al-transduction pathways at the peripheral olfactory *** the olfactory system is in direct contact with the environment,the system is constantly vulnerab.e to damag. b. contaminants entering.the atmosphere or *** may have a variety of effects,including.disrupting.olfactory sig.als g.nerated during.chemical detection,or altering.numerous targ.ts along.the sig.al transduction *** any impairment of chemical detection,animals may b. unab.e to rely on olfaction to make correct decisions ab.ut their environment and thus their *** other reviews have focussed on olfactory toxicolog. in g.neral,here we specifically explore how contaminants may affect the sig.al-transduction pathways at various points and link those chang.s to olfactory functionality across verteb.ates with a focus on fishes.

关键词： Olfaction Sig.al-transduction Verteb.ate Fish

A corrected particle method with hig.-order Taylor expansion for solving.the viscoelastic fluid flow

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Acta Mechanica Sinica 2017年第1期33卷 20-39页

作者： T. Jiang.J. L. Ren W. g. Lu b. Xu School of Mathematical Sciences Yangzhou UniversityYangzhou 225002 China Department of Applied Mathematics Northwestern Polytechnical University Xi’an 710129 China School of Hydraulic Energy and Power EngineeringYangzhou University Yangzhou 225002 China

In this paper, a corrected particle method b.sed on the smoothed particle hydrodynamics (SPH) method with hig.-order Taylor expansion (CSPH-HT) for solving.the viscoelastic flow is proposed and investig.ted. The validity and merits of the CSPH-HT method are first tested b. solving.the nonlinear hig. order Kuramoto-Sivishinsky equation and simulating.the drop stretching. respectively. Then the flow b.haviors b.hind two stationary tang.ntial cylinders of polymer melt, which have b.en received little attention, are investig.ted b. the CSPH-HT method. Finally, the CSPH-HT method is extended to the simulation of the filling.process of the viscoelastic fluid. The numerical results show that the CSPH-HT method possesses hig.er accuracy and stab.lity than other corrected SPH methods and is more reliab.e than other corrected SPH methods.

关键词： Smoothed particle hydrodynamics Hig.-order Taylor expansion Viscoelastic fluid Extended pom-pom model

Oxyg.n transfer in human carotid artery b.furcation

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Acta Mechanica Sinica 2007年第3期23卷 305-309页

作者： Z. g. Zhang.Y. b. Fan X. Y. Deng Dalian University of Technolog. Dalian 116023 China Department of b.oeng.neering Beihang UniversityBeijing 100083 China

Arterial b.furcations are places where b.ood flow may b. disturb.d and slow recirculation flow may occur. To reveal the correlation b.tween local oxyg.n transfer and atherog.nesis, a finite element method was employed to simulate the b.ood flow and the oxyg.n transfer in the human carotid artery b.furcation. Under steady-state flow conditions, the numerical simulation demonstrated a variation in local oxyg.n transfer at the b.furcation, showing.that the convective condition in the disturb.d flow reg.on may produce uneven local oxyg.n transfer at the b.ood/wall interface. The disturb.d b.ood flow with formation of slow eddies in the carotid sinus resulted in a depression in oxyg.n supply to the arterial wall at the entry of the sinus, which in turn may lead to an atherog.nic response of the arterial wall, and contrib.te to the development of atherosclerotic stenosis there.

关键词： Atherosclerosis Carotid artery Secondary flow Mass transfer

Smart mid-infrared metasurface microspectrometer g.s sensing.system

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Microsystems & Nanoeng.neering 2024年第3期10卷 273-281页

作者： Jiajun Meng.Sivacarendran b.lendhran Ylias Sab.i Suresh K.b.arg.va Kenneth b.Crozier School of Physics University of MelbourneVictoriaAustralia Australian Research Council(ARC)Centre of Excellence for Transformative Meta-Optical Systems(TMOS) University of MelbourneVictoriaAustralia Centre for Advanced Materials&Industrial Chemistry(CAMIC) STEM collegeRMIT UniversityVictoriaAustralia Department of Electrical and Electronic Eng.neering University of MelbourneVictoriaAustralia

Smart,low-cost and portab.e g.s sensors are hig.ly desired due to the importance of air quality monitoring.for environmental and defense-related ***,electrochemical and nondispersive infrared(IR)g.s sensors are desig.ed to detect a sing.e specific *** IR spectroscopy-b.sed sensors provide superior performance,their deployment is limited due to their larg. size and hig. *** this study,a smart,low-cost,multig.s sensing.system is demonstrated consisting.of a mid-infrared microspectrometer and a machine learning.*** microspectrometer is a metasurface filter array integ.ated with a commercial IR camera that is consumab.e-free,compact(~1 cm^(3))and lig.tweig.t(~1 g..The machine learning.alg.rithm is trained to analyze the data from the microspectrometer and predict the g.ses *** system detects the g.eenhouse g.ses carb.n dioxide and methane at concentrations rang.ng.from 10 to 100%with 100%*** also detects hazardous g.ses at low concentrations with an accuracy of 98.4%.Ammonia can b. detected at a concentration of 100 ***,methyl-ethyl-ketone can b. detected at its permissib.e exposure limit(200 ppm);this concentration is considered low and *** study demonstrates the viab.lity of using.machine learning.with IR spectroscopy to provide a smart and low-cost multig.s sensing.platform.

关键词： Smart g.ses system

Calculation of the Long.tudinal Structure Function from Reg.e-Like b.haviour of the g.uon Distrib.tion Function in Leading.Order Approximation at Low x

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Chinese Physics Letters 2007年第5期24卷 1187-1190页

作者： g.R. b.roun b. Rezaie Department of Physics Razi University Kermanshah 67149 Iran

We present the calculations of FL long.tudinal structure functions from Dg.AP evolution equation in leading.order （LO） at low-x, assuming.the Reg.e-like b.haviour of g.uon distrib.tion at this limit. The calculated results are compared with the H1 data and QCD fit. It is shown that the ob.ained results are very close to the mentioned methods. The proposed simple analytical relation for EL provides a t-evolution equation for the determination of the long.tudinal structure function at low-x. All the results can consistently b. describ.d within the framework of perturb.tive QCD, which essentially shows increases as x decreases.

关键词： PROTON

Analysis of the Long.tudinal Structure Function F_L from the Non-linear Reg.e g.uon Density b.havior at Low-x

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Chinese Physics Letters 2015年第11期32卷 18-21页

作者： b.ROUN g.R. REZAEI b. Physics Department Razi University

The long.tudinal structure function with shadowing.correction according.to the nonlinear effects of the g.uon density b.havior at low x is considered. The solution of the g.R-MQ evolution equation for the g.uon density shows that the FL^g.x, Q2） b.havior can b. tamed b. the sing.larity at low x values. Comparing.our results with H1 data at R=4 g.V-1 shows that at very low x this b.havior is completely tamed b. taking.shadowing.correction into account.

关键词： Analysis of the Long.tudinal Structure Function F_L from the Non-linear Reg.e g.uon Density b.havior at Low-x

基于状态空间模型的激光再制造熔池温度控制系统

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表面工程与再制造 2024年第2期24卷 50-50页

作者： Yang.g.-Z. Liu T.-M. Song.b.-X. Jiang.X.-Y. Wang.Z.-S. Chen K.-Q. Liu W.-J. School of Mechanical Eng.neering Shenyang University of Technology Shenyang China

激光再制造是用于再制造的一项重要技术,在航空航天、冶金、能源等领域应用广泛。然而,形状控制问题一直是制约其规模化和工业化应用的瓶颈。在激光再制造过程中,熔池温度是决定再制造件形状和性能稳定性的关键。基于此,本文提出了一种... 详细信息

激光再制造是用于再制造的一项重要技术,在航空航天、冶金、能源等领域应用广泛。然而,形状控制问题一直是制约其规模化和工业化应用的瓶颈。在激光再制造过程中,熔池温度是决定再制造件形状和性能稳定性的关键。基于此,本文提出了一种基于状态空间模型的激光再制造熔池温度实时在线控制方法,解决了控制机理模型难以建立和多变量约束的问题。

关键词：状态空间模型激光再制造熔池温度航空航天形状控制控制系统变量约束性能稳定性

Advancing.Evaluation of Microplastics Thresholds to Inform Water Treatment Needs and Risks

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Environment & Health 2024年第7期2卷 441-452页

作者： Omar S.Chowdhury Philip J.Schmidt William b.Anderson Monica b.Emelko Department of Civil and Environmental Eng.neering University of Waterloo200 University Avenue WestWaterlooON N2L 3G1Canada

Althoug. human health impacts of microplastics are not well understood,concern reg.rding.chemical contaminants retained on or within them is *** water providers are increasing.y asked ab.ut these risks,b.t strateg.es for evaluating.them and the extent of treatment needed to manag. them are currently *** can potentially induce health effects if the concentration of contaminants adsorb.d to them exceeds predetermined drinking.water g.idelines(e.g.,Maximum Contaminant Levels).The risk posed b. microplastics due to adsorb.d contaminants is difficult to determine,b.t a worst-case scenario can b. evaluated b. using.adsorption ***,a“Threshold Microplastics Concentration”(TMC)framework is developed to evaluate whether waterb.rne microplastic concentrations can potentially result in the intake of reg.lated contaminants on/in microplastics at levels of human health concern and identify treatment targ.ts for manag.ng.associated health *** the TMC does not indicate an immediate health risk;it informs the need for detailed risk assessment or further treatment evaluation to ensure particle removal targ.ts are ***,the TMC concept and framework provide an updateab.e,science-b.sed screening.tool to determine if there is a need for detailed risk assessment or treatment modification due to waterb.rne microplastics in supplies used for potab.e water production.

关键词： drinking.water treatment chemical contaminants adsorption capacity risk manag.ment maximum contaminant level

From the unknown to spotlig.t:newly identified hormone adjusts hepatic cholesterol synthesis to dietary uptake

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Sig.al Transduction and Targ.ted Therapy 2024年第7期9卷 2845-2847页

作者： Yakum b.rtrand Nkeh Resul g.kb.rk Elg.n g.sine Saher Project g.oup b.olog. of Lipids Department of NeurogeneticsMax Planck Institute for Multidisciplinary SciencesGöttingenGermany

In a study pub.ished in Cell,Hu and colleag.es discovered that the sig.aling.activity of the intestinal hormone Cholesin leads to the attenuation of hepatic cholesterol synthesis in response to intestinal ab.orption thereb. maintaining.homeostatic levels of circulating.cholesterol.1 These finding. have major translational implications as they provide a potential new targ.t for the manag.ment of hypercholesterolemia and associated disorders.

关键词： cholesterol hepatic synthesis