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桑沟湾和胶州湾沉积物耗氧率研究

海洋科学进展 2006年第1期24卷 91-96页

作者：张学雷朱明远陈尚 grant jon MARTIN Jean-Louis 国家海洋局第一海洋研究所达尔豪斯大学法国海洋开发研究院生态养殖中心

为评价浅海海域底层在碳元素生物地化循环中的作用,采用现场取样培养法测定了黄海桑沟湾和胶州湾的沉积物耗氧率。桑沟湾5月和8月的沉积物耗氧率分别为15和24 mmol.m-2.d-1;胶州湾8月的沉积物耗氧率为18 mmol.m-2.d-1。回归分析表明,2... 详细信息

为评价浅海海域底层在碳元素生物地化循环中的作用,采用现场取样培养法测定了黄海桑沟湾和胶州湾的沉积物耗氧率。桑沟湾5月和8月的沉积物耗氧率分别为15和24 mmol.m-2.d-1;胶州湾8月的沉积物耗氧率为18 mmol.m-2.d-1。回归分析表明,2个湾的沉积物耗氧率分别与沉积物表层的有机碳和总氮含量正相关。取呼吸商为0.8,得到桑沟湾底层对有机碳的矿化率占水层初级生产力的102%(5月)和67%(8月),胶州湾底层对有机碳的矿化率占水层初级生产力的28%(8月)。取桑沟湾颗粒有机碳的生物沉积速率为236 mg.m-2.d-1,得到底层对有机碳的埋置效率为40%(5月)和3%(8月),埋置的有机碳占水层初级生产力的69%(5月)和2%(8月);胶州湾颗粒有机碳的自然沉积速率为251 mg.m-2.d-1,底层对有机碳的埋置效率为32%(8月),埋置的有机碳占水层初级生产力的13%(8月)。

关键词：耗氧率底层通量有机碳矿化有机碳埋置

On the rate of convergence of the maximum likelihood estimator of a k-monotone density

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Science China Mathematics 2009年第7期52卷 1525-1538页

作者： WELLNER jon A Department of Statistics University of Washington

Bounds for the bracketing entropy of the classes of bounded k-monotone functions on [0,A] are obtained under both the Hellinger distance and the Lp(Q) distance,where 1 p < ∞ and Q is a probability measure on [0,A].The result is then applied to obtain the rate of convergence of the maximum likelihood estimator of a k-monotone density.

关键词： bracketing metric entropy maximum likelihood estimator Hellinger distance 62G05 46B50

Amine reclaiming technologies in post-combustion carbon dioxide capture

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Journal of Environmental Sciences 2015年第1期27卷 276-289页

作者： Tielin Wang jon Hovland Klaus J.Jens Telemark University College Tel-Tek Porsgrunn 3918 Norway

Amine scrubbing is the most developed technology for carbon dioxide（CO2） *** of amine solvents due to the presence of high levels of oxygen and other impurities in flue gas causes increasing costs and deterioration in long term performance,and therefore purification of the solvents is needed to overcome these problems. This review presents the reclaiming of amine solvents used for post combustion CO2capture（PCC）. Thermal reclaiming, ion exchange, and electrodialysis, although principally developed for sour gas sweetening, have also been tested for CO2 capture from flue *** three technologies all have their strengths and weaknesses, and further development is needed to reduce energy usage and costs. An expected future trend for amine reclamation is to focus on process integration of the current reclaiming technologies into the PCC process in order to drive down costs.

关键词： Carbon dioxide capture Amine reclaiming Distillation Ion exchange Electrodialysis

Comprehensive Studies of Seismic Forecast and Seismic Hazard Assessment in Armenia, Current State and Prospects

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Acta Geologica Sinica(English Edition) 2021年第S1期95卷 55-58页

作者： Karapetyan jon LI Li Institute of Geophysics and Engineering Seismology named after A.Nazarov NAS RAGyumri3115Armenia Institute of Geophysics CEABeijing100081China

The study of geophysical processes in different layers of the Earth,seismic hazard assessment,earthquake prediction,*** topical fundamental and applied *** development of a modern adequate methodology for assessing se... 详细信息

关键词： seismic hazard assessment earthquake prediction earthquake monitoring Earth crust

The Adjacency Codes of the First Yellow Graphs

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Journal of Systems Science & Complexity 2023年第4期36卷 1757-1768页

作者： SHI Minjia LI Shitao KIM jon-Lark SOLE Patrick Key Laboratory of Intelligent Computing and Signal Processing Ministry of EducationSchool of Mathematical SciencesAnhui UniversityHefei 230601China State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijing 100093China School of Mathematical Sciences Anhui UniversityHefei 230026China Department of Math Sogang UniversitySeoulSouth Korea Aix Marseille Univ CNRSCentrale MarseilleI2MMarseilleFrance

The authors study the binary codes spanned by the adjacency matrices of the strongly regular graphs(SRGs)on at most two hundred vertices whose existence is *** authors show that in length less than one hundred they cannot be cyclic,except for the exceptions of the SRGs of parameters(85,42,20,21)and(96,60,38,36).In particular,the adjacency code of a(85,42,20,21)is the zero-sum *** the range[100,200]the authors find 29 SRGs that could possibly have a cyclic adjacency code.

关键词： Cyclic codes strongly regular graphs adjacency codes self-orthogonal codes

Comparison of ART outcomes in men with altered mRNA protamine 1/protamine 2 ratio undergoing intracytoplasmic sperm injection with ejaculated and testicular spermatozoa

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Asian Journal of Andrology 2020年第6期22卷 623-628页

作者： jonas Sarasa Maria Enciso Laura Garcia Andrea Leza Klaus Steger jon Aizpurua iGLS Alicante 03540SpainMolecular AndrologyJustus-Liebig-UDiversity GiessenGiessen 35385Germany IVF-Spain Alicante 03540SpainMolecular AndrologyJustus-Liebig-UDiversity GiessenGiessen 35385Germany Department of Urology Pediatric Urology and AndrologyMolecular AndrologyJustus-Liebig-UDiversity GiessenGiessen 35385Germany

Assisted reproductive technologies invoIving the use of spermatozoa and eggs for in vitro fertilization(IVF)have come as the solution for many infertile couples to become ***,in some cases,the use of ejaculated spermatozoa delivers poor IVF *** studies have suggested the use of testicular spermatozoa in severe male in fertility cases,but no guideli nes regarding their utilization are currently *** the present study,we found the mRNA protamine 1/protamine 2(P1/P2)ratio to be a valuable biomarker of poor sperm function that could be used as a diagnostic key for the identification of cases that would benefit from the use of testicular spermatozoa.A total of 23 couples undergoing egg donation cycles with at least one previous cycle failure were *** couples underwent two consecutive intracytoplasmic sperm injection(ICSI)cycles with either ejaculated or testicular spermatozoa(TESA).The sperm mRNA P1/P2 ratio,fertilization rate,blastocyst rate,and pregnancy and live birth rate were *** showed improved ICSI and clinical outcomes in cycles with testicular spermatozoa in men with altered mRNA P1/P2 *** cycles presented significantly higher rates of fertilization(mean±standard deviation:76.1%±15.1%vs 65.5%±18.8%),blastocyst formation(55.0%±20.3%vs 30.8%±23.8%),and good morphological quality blastocyst(28.9%±22.9%vs 13.5%±17.9%)and also improvements on pregnancy(60.9%vs 0%)and healthy birth rates(56.5%vs 0%)than EJACULATE *** results described here suggest that in patients with previous IVF/ICSI failures and aberrant mRNA protamine ratios,the use of testicular spermatozoa may be a good alternative to improve clinical outcomes.

关键词： DNA damage male infertility mRNA protamine ratio sperm chromatin testicular spermatozoa

The importance of post-COVID condition phenotypes characterization to decipher the mechanisms underlying this post-viral syndrome

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World Journal of Pediatrics 2024年第6期20卷 633-634页

作者： jon Izquierdo-Pujol Sara Moron-Lopez IrsiCaixa and Institute for Health Science Research Germans Trias i Pujol(IGTP) Can Ruti CampusBadalonaSpain Biomedicine doctoral programme Faculty of BiologyUniversity of BarcelonaBarcelonaSpain CIBERINFEC MadridSpain

The coronavirus disease-19(COVID-19)outbreak,caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),was declared a global pandemic in March *** has affected over 700 million people worldwide and resulted in almost 7 million deaths,equating to a 1%mortality *** present,the majority of COVID-19 cases are either asymptomatic or mild,typically resolving within two ***,between 1%and 10%of COVID-19 survivors do not fully recover and experience a post-viral syndrome referred to as"long COVID","post-acute COVID-19 syndrome"(PASC),or"post-COVID condition"(PCC).This post-viral syndrome affects both adult and pediatric ***,most of the studies published to date evaluate the adult population,leaving a gap in our understanding of its impact on children and adolescents.

关键词： acute mortality respiratory

QUADRATURE METHODS FOR HIGHLY OSCILLATORY SINGULAR INTEGRALS

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Journal of Computational Mathematics 2021年第2期39卷 227-260页

作者： Jing Gao Marissa Condon Arieh Iserles Benjamin Gilvey jon Trevelyan School of Mathematics and Statistics Xi'an Jiaotong UniversityXi'an 710049China School of Electronic Engineering Dublin City UniversityIreland DAMTP Centre for Mathematical SciencesUniversity of CambridgeUK Department of Engineering Durham UniversityUK

We address the evaluation of highly oscillatory integrals,with power-law and logarithmic *** problems arise in numerical methods in ***,the evaluation of oscillatory integrals dominates the run-time for wave-enriched boundary integral formulations for wave scattering,and many of these exhibit *** show that the asymptotic behaviour of the integral depends on the integrand and its derivatives at the singular point of the integrand,the stationary points and the endpoints of the integral.A truncated asymptotic expansion achieves an error that decays faster for increasing *** on the asymptotic analysis,a Filon-type method is constructed to approximate the *** an asymptotic expansion,the Filon method achieves high accuracy for both small and large ***-valued quadrature involves interpolation at the zeros of polynomials orthogonal to a complex weight *** results indicate that the complex-valued Gaussian quadrature achieves the highest accuracy when the three methods are ***,while it achieves higher accuracy for the same number of function evaluations,it requires signi cant additional cost of computation of orthogonal polynomials and their zeros.

关键词： Numerical quadrature Singular highly oscillatory integrals Asymptotic analysis Boundary Element Method Plane wave enrichment Partition of Unity

Current hypotheses to explain genetic chaos under the sea

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Current Zoology 2016年第6期62卷 551-566页

作者： Bjarki ELDON Florentine RIQUET jon YEARSLEY Didier JOLLIVET Thomas BROQUET Museum fur Naturkunde Berlin Leibniz Institut fur Evolutionsund Biodiversitatsforschung Berlin 10115 Germany Universite Montpellier 2 Place Eugene Bataillon 34095 Mentpellier Cedex 5 France ISEM - CNRS UMR 5554 SMEL 2 rue des Chantiers SAte 34200 France School of Biology and Environmental Science and UCD Earth Institute University College Dublin Belfield Dublin 4 Ireland Centre National de la Recherche Scientifique Team Adaptation and Biology of Invertebrates in Extreme Environments Station Biologique de Roscoff Roscoff 29680 France Sorbonne Universites Universite Pierre et Marie Curie Unite Mixte de Recherche 7144 Station Biologique de Roscoff Roscoff 29680 France Centre National de la Recherche Scientifique Team Diversity and Connectivity of Coastal Marine Landscapes Station Biologique de Roscoff Roscoff 29680 France

Chaotic genetic patchiness （CGP） refers to surprising patterns of spatial and temporal genetic structure observed in some marine species at a scale where genetic variation should be efficiently homogenized by gene flow via larval dispersal. Here we review and discuss 4 mechanisms that could generate such unexpected patterns： selection, sweepstakes reproductive success, collective dispersal, and temporal shifts in local population dynamics. First, we review examples where genetic differentiation at specific loci was driven by diversifying selection, which was historically the first process invoked to explain CGP. Second, we turn to neutral demographic processes that may drive genome-wide effects, and whose effects on CGP may be enhanced when they act together. We discuss how sweepstakes reproductive success accelerates genetic drift and can thus generate genetic structure, provided that gene flow is not too strong. Collective dispersal is another mechanism whereby genetic structure can be maintained regardless of dispersal intensity, because it may prevent larval cohorts from becoming entirely mixed. Theoretical analyses of both the sweepstakes and the collective dispersal ideas are presented. Finally, we discuss an idea that has received less attention than the other ones just mentioned, namely temporal shifts in local population dynamics.

关键词： asynchronous population dynamics chaotic genetic patchiness collective dispersal kin aggregation larval dispersal multiple-merger coalescent sweepstakes reproductive success.