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电动汽车充电负荷对丹麦配电系统的影响

电力系统自动化 2011年第14期35卷 18-23页

作者：徐立中杨光亚许昭 f.marra C.TRAEHOLT 浙江大学电气工程学院浙江省杭州市310027 Centre for Electric Technology Technical University of DenmarkKgs.Lyngby DK2800Denmark 香港理工大学电机工程学系中国香港

电动汽车在减少二氧化碳排放方面意义重大。随着电动汽车数量的不断增加,其对电力系统尤其是对中低压系统影响的研究也成为日趋紧迫的课题。电动汽车充电负荷作为一种随机负荷,其负荷模型受用户用车习惯、电池特性及环境等的影响。以丹... 详细信息

电动汽车在减少二氧化碳排放方面意义重大。随着电动汽车数量的不断增加,其对电力系统尤其是对中低压系统影响的研究也成为日趋紧迫的课题。电动汽车充电负荷作为一种随机负荷,其负荷模型受用户用车习惯、电池特性及环境等的影响。以丹麦为背景,考虑用户日常驾车模式及充电模式,对电动汽车充电负荷特性作了初步分析,并将其应用于典型配电系统分析之中。针对存在大量风电的配电系统,采用蒙特卡洛仿真研究了电动汽车在不同普及程度、电价条件和季节下对配电系统的影响。

关键词：电动汽车用车习惯电池特性配电系统风能

1997年翁布里亚—马尔凯(意大利)地震序列:地面形变与孕震构造的关系

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世界地震译丛 2003年第6期34卷 54-58页

作者： f．R．Cinti L．Cucci f．marra P．Montone 吴江吕春来胥广银不详四川省地震局

1997年翁布里亚—马尔凯地震序列期间进行的野外测量,发现了与3次最大地震(M_w≥5.7)有关的地面和路面上产生的破裂。破裂集中发生在几个狭长的条带上,这些条带部分处于或邻近原来标绘出的大倾角的正断层。地面形变的几何形态与主震的... 详细信息

1997年翁布里亚—马尔凯地震序列期间进行的野外测量,发现了与3次最大地震(M_w≥5.7)有关的地面和路面上产生的破裂。破裂集中发生在几个狭长的条带上,这些条带部分处于或邻近原来标绘出的大倾角的正断层。地面形变的几何形态与主震的矩心矩张量震源机制解所得出的北东走向的延长线是一致的。余震的分布表明,3个主震发生在南西向倾斜约40°的正断层上。地质调查、预期的同震高程变化模拟以及地震资料都表明;地面形变并不是深处的断层起始破裂直接造成的。

关键词：地震序列地面形变孕震构造褶皱逆冲

Quick and easy assessment of sarcopenia in cirrhosis: Can ultrasound be the solution?

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World Journal of Gastroenterology 2024年第17期30卷 2287-2293页

作者： francesca Campani Tancredi Vincenzo Li Cavoli Umberto Arena fabio marra Erica Nicola Lynch Claudia Campani Department of Health Science University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Internal Medicine and Liver Unit University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Department of Experimental and Clinical Medicine University of FlorenceFlorence 50134Italy Gastroenterology Research Unit Department of Experimental and Clinical Biomedical Sciences“Mario Serio”University of FlorenceFlorence 50134Italy Department of Medical Biotechnologies University of SienaSiena 53100Italy

Cirrhosis is frequently associated with sarcopenia,with reported rates of over 80%in patients with decompensated alcohol-related liver *** nega-tively impacts the prognosis of cirrhotic patients and affects the response to treatment of patients with hepatocellular carcinoma(HCC).for these reasons,identifying an easy-to-perform method to assess sarcopenia in is a key element in the optimization of care in this patient *** of muscle mass by computed tomography is considered the standard of care for the diagnosis of sarcopenia,but exposure to radiation and high costs limit its application in this setting,especially for repeated *** believe that ultrasound,a cheap and harmless technique also used for HCC screening in cirrhotic patients,could have an expanding role in the diagnosis and follow-up of sarcopenia in these patients.

关键词： Sarcopenia Ultrasound Cirrhosis Hepatocellular carcinoma Computed tomography

Control and vibration analyses of a sandwich doubly curved micro-composite shell with honeycomb,truss,and corrugated cores based on the fourth-order shear deformation theory

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Applied Mathematics and Mechanics(English Edition) 2024年第10期45卷 1773-1790页

作者： f.SHIRDELAN M.MOHAMMADIMEHR f.BARGOZINI Department of Solid Mechanics Faculty of Mechanical EngineeringUniversity of KashanKashan 87317-53153Iran

Curved shells are increasingly utilized in applied engineering due to their shared characteristics with other sandwich structures,flexibility,and attractive ***,the inability of controlling and regulating vibrations and destroying them afterward is a challenge to *** this paper,the curve shell equations and a linear quadratic regulator are adopted for the state feedback design to manage the structure vibrations in state space forms.A five-layer sandwich doubly curved micro-composite shell,comprising two piezoelectric layers for the sensor and actuator,is modeled by the fourth-order shear deformation *** core(honeycomb,truss,and corrugated)is analyzed for the bearing of transverse shear *** results show that the honeycomb core has a greater effect on the *** the parameters related to the core and the weight percentage of graphene increase,the frequency *** uniform distribution of graphene platelets results in the lowest natural frequency while the natural frequency ***,without taking into account the piezoelectric layers,the third-order shear deformation theory(TSDT)and fourth-order shear deformation theory(fOSDT)align ***,when the piezoelectric layers are incorporated,these two theories diverge significantly,with the frequencies in the fOSDT being lower than those in the TSDT.

关键词： vibration and control doubly curved shell micro-composite honeycomb truss corrugate core

Bolstering integrity in environmental data science and machine learning requires understanding socioecological inequity

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frontiers of Environmental Science & Engineering 2024年第5期18卷 171-179页

作者： Joe f.Bozeman III School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA30332USA School of Public Policy Georgia Institute of TechnologyAtlantaGA30332USA

Socioecological inequity in environmental data science—such as inequities deriving from data-driven approaches and machine learning(ML)—are current issues subject to debate and *** is growing consensus around embedding equity throughout all research and design domains—from inception to administration,while also addressing procedural,distributive,and recognitional ***,practically doing so may seem onerous or daunting to *** current perspective helps to alleviate these types of concerns by providing substantiation for the connection between environmental data science and socioecological inequity,using the Systemic Equity framework,and provides the foundation for a paradigmatic shift toward normalizing the use of equity-centered approaches in environmental data science and ML *** the integrity of environmental data science and ML is just beginning from an equity-centered tool development and rigorous application *** this end,this perspective also provides relevant future directions and challenges by overviewing some meaningful tools and strategies—such as applying the Wells-Du Bois Protocol,employing fairness metrics,and systematically addressing irreproducibility;emerging needs and proposals—such as addressing data-proxy bias and supporting convergence research;and establishes a ten-step path ***,the work that environmental scientists and engineers do ultimately affect the well-being of us all.

关键词： Equity Bias Machine Learning Data Science Justice Systemic Equity

Premature axon-oligodendrocyte interaction contributes to stalling of experimental axon regeneration after injury to the white matter

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Neural Regeneration Research 2024年第3期19卷 469-470页

作者： Ephraim f.Trakhtenberg Department of Neuroscience University of Connecticut School of MedicineFarmingtonCTUSA

Studies from nearly 3 decades ago suggested that,in the central nervous system(CNS),myelination of axons by oligodendrocytes not only helps improve axonal conductivity but also stabilizes circuitry(Colello and Schwab,1994).Over the years,myelin sheaths produced by oligodendrocytes have been found to contain multiple molecules that are inhibitory to axonal growth(e.g.,MAG,NogoA,OMgp,Semaphorins)(Yiu and He,2006;Silver et al.,2014).After white matter injury in the adult CNS,myelin debris from damaged axons and dead oligodendrocytes accumulates in the forming glial scar and exposes these myelin-associated axon growth-inhibitory molecules to the injured axonal stumps,thereby contributing to the inhibition of axonal *** development,CNS axons reach their postsynaptic targets and stop growing before oligodendrocytes appear and myelinate them(foran and Peterson,1992;Dangata et al.,1996).Therefore,myelin-associated axon growth-inhibitory molecules interacting with already grown axons during myelination were thought to block axons from promiscuous sprouting and miswiring,thereby stabilizing neural circuitry in the CNS(Colello and Schwab,1994).

关键词： thereby white injury

An unexpected cellular fountain of youth:platelets provide factors rejuvenating brain functions

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Signal Transduction and Targeted Therapy 2024年第1期9卷 16-18页

作者： Harald f.Langer Department of Cardiology AngiologyHaemostaseology and Medical Intensive CareUniversity Medical Centre MannheimMedical Faculty MannheimHeidelberg UniversityMannheimGermany German Centre for Cardiovascular Research(DZHK) Partner Site Heidelberg/MannheimMannheimGermany European Center for Angioscience Medical Faculty MannheimHeidelberg UniversityMannheimGermany Cardiovascular systems biology Medical Clinic IUniversity Heart Center LübeckLübeckGermany

In a recent manuscript published in Nature,Schroer et *** that platelets and in particular platelet derived Pf-4(CXCL4)are a novel factor,which can rejuvenate the mammalian neuronal system.1 These findings have the potential to trigger an entire new field of research opening new platelet-derived candidate effector molecules for supporting regeneration.

关键词： supporting platelets finding

Post Cryopreservation Growth Kinetic and Photosynthetic Assessment of an Acid Tolerant Strain of Stichococcus bacillaris

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Natural Resources 2024年第5期15卷 130-148页

作者： Marzia Licata Luigi marra Nunzia Nappi Elena Aurino feliciana Oliva Antonino De Natale Donato Giovannelli Antonino Pollio Department of Biology University of Naples &#8220Federico II&#8221 Naples Italy ACUf Algal Collection of University of Naples &#8220Federico II&#8221 Naples Italy Department of Chemical Materials and Industrial Production Engineering University of Naples &#8220Federico II&#8221 P.le V. Tecchio Naples Italy Institute for Marine Biological Resources and Biotechnologies Italian National Research Council CNR-IRBIM Ancona Italy Earth-Life Science Institute ELSI Tokyo Institute of Technology Tokyo Japan Marine Chemistry and Geochemistry Department Woods Hole Oceanographic Institution Woods Hole MA USA Department of Marine and Coastal Science Rutgers University New Brunswick NJ USA

Preserving microbial diversity has become a strategic undertaking. Thus, ex situ microalgal culture conservation results in strategic and functional resource in both biodiversity protection and application domains. Cryopreservation of microalgae has been practiced since the 1960s and is now considered the optimal preservation strategy. furthermore, the overall monitoring during growth of cultures after freezing/thawing protocols was hardly investigated and there is poor evaluation related to preserve especially the photosystem apparatus. The present study focuses on Stichococcus bacillaris as case study for short-term cryopreservation at −80 °C storage. Various freezing pretreatments using cryoprotective agents, and two thawing methods were compared introducing a novel variable to evaluate viability recovery and assessing growth kinetics of cultures immediately after thawing and after a series batch cultivation. Photosynthetic rate and pigments assessment were proposed to evaluate hidden metabolic cell damage. Results underline cryoprotective agents can increase the kinetic recovery of preserved cells in terms of reduction of lag phase during batch cultivation tests: the use of dimethyl sulfoxide and glycerol granted a growth comparable to unpreserved cells when sudden thawing occurs after 24 hours of storage, but recovery after preservation is less sensitive to cryoprotective agents when gradual thawing and 1 month of storage is considered. However, cells are always able to restore their physiological pathways even without agents, so their kinetic effect has been proved and quantified. Interestingly, both the photosynthetic efficiency and the ratio between total chlorophyll and carotenoids are comparable (0.75 fv/fm, 2.2 ± 0.25 g/g) to unpreserved cells and they are unsensitive to chosen agents, but the ratio between chlorophyll a and chlorophyll b was clearly altered (up to 10 times), suggesting that photoactive pigments relative proportions

关键词： Microalgae Stichococcus bacillaris Cryopreservation Growth Kinetic Photosynthetic Rate

The viscous strip approach to simplify the calculation of the surface acoustic wave generated streaming

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 711-724页

作者： f.JAZINI DORCHEH M.GHASSEMI fuel Cells and Nano Systems(fCNS)Laboratory Department of Mechanical EngineeringK.N.Toosi University of TechnologyTehran 19697Iran

In recent decades,the importance of surface acoustic waves,as a biocompatible tool to integrate with microfluidics,has been proven in various medical and biological *** numerical modeling of acoustic streaming caused by surface acoustic waves in microchannels requires the effect of viscosity to be considered in the equations which complicates the *** this paper,it is shown that the major contribution of viscosity and the horizontal component of actuation is concentrated in a narrow region alongside the actuation *** the inviscid equations are considerably easier to solve,a division into the viscous and inviscid domains would alleviate the computational load *** particles'traces calculated by this approximation are excellently alongside their counterparts from the completely viscous *** is also shown that the optimum thickness for the viscous strip is about 9-fold the acoustic boundary layer thickness for various flow patterns and amplitudes of actuation.

关键词： surface acoustic wave microfluidics numerical simulation particle tracing acoustic streaming