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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 1-11页

作者： Iasonas Kouveliotis-Lysikatos Nikos Hatziargyriou Yanli Liu felix Wu Department of Electrical Engineering and Computer Science KTH-Royal Institute of TechnologyTeknikringen 3310040StockholmSweden School of Electrical and Computer Engineering National Technical University of Athens15773 AthensGreece School of Electrical and Information Engineering Tianjin UniversityTianjin300072China Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina Department of Electrical Engineering and Computer Sciences University of CaliforniaBerkeleyCA 94720USA

The great challenges faced by modern power systems require a fresh look at the conventional operation paradigm. The significant challenges faced by modern power systems require an innovative method for the conventional operation paradigm. We claim that the decarbonization of the power grid and extensive electrification of numerous sectors of human activity can only be fostered by a self-adaptable and smart power grid that manifests similar qualities to those of the Internet. The Internet is constructed on a layered architecture that facilitates technology innovations and its intelligence is distributed throughout a hierarchy of networks. In this paper, the fundamental differences between the network data flows and power flows are examined, and the basic requirements for an innovative operation paradigm are highlighted. The current power grid is operated in a highly inflexible, centralized manner to meet increased security goals. A new highly flexible, distributed architecture can be realized by distributing the operation responsibility in smaller areas or even in grid components that can make autonomous decisions. The characteristics of such a power grid are presented, and the key features and advances for the on-going transition to a sustainable power system are identified. Finally, a case study on distributed voltage control is presented and discussed.

关键词： Smart grid Internet distributed intelligence decentralized architecture

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Is hyperexcitability really guilty in amyotrophic lateral sclerosis?

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Neural Regeneration Research 2015年第9期10卷 1413-1415页

作者： felix Leroy Daniel Zytnicki Centre de Neurophysique Physiologie et Pathologie UMR 8119 Université Paris Descartes UMR 8119 45 rue des Saints-Pères 752070 Paris Cedex 06 France

Amyotrophic lateral sclerosis （ALS） is a lethal disorder char- acterized by the gradual degeneration of brainstem and spinal motoneurons as well as lateral cortico-spinal tracts. The onset generally occurs during the adult age except for some juvenile aggressive forms. Until recently, the vast majority of the cases （90%） were deemed sporadic. Mutations in the SOD1 gene have been for a long time the only ones reported in familiar forms of ALS. However, the recent implication of new genes of little known function cast a new view on this disease. C9ORF72, for example, is now recognized to account for 30% of the familial cases. Overall, ALS has been linked to 20 different genes, many also associated with other degenerative diseases （frontotemporal dementia, Alzheimer or ataxia）. Some of these genes are in- volved in RNA maturation （FUS, TARBD）. Clinical observation of human patients and mouse models suggests that all motor pools and motoneurons are not equally affected （see Kanning et al., 2010）. The disease usually starts in motor pools controlling the limbs or in the bulbar area before expanding to other motor pools, with the exception of a few resistant ones （Onuf＇s and oculomotor nuclei）. Within a vulnerable motor pool, motoneu- tons subtypes also exhibit differential vulnerability and follow an orderly degeneration; starting with the motoneurons innervating fast-contracting fatigable motor units （IZF motoneurons） and followed by the ones innervating fast-contractile fatigue-resistant motor units （FR motoneurons）. The motoneurons in- nervating slow motor units （S motoneurons） appear resistant to the disease. Although the mechanisms leading to the orderly degeneration are not known, many hypotheses have been raised （Ilieva et al., 2009）.

关键词： hyperexcitability amyotrophic sclerosis

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Analysis of pneumatic atomizer spray profiles

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Particuology 2016年第6期14卷 80-85页

作者： Walter Schafer Simon Rosenkranz felix Brinckmann Cameron Tropea AOM-Systems GmbH Flughafenstrasse 15 64347 Griesheim Germany LacTec GmbH Otto-Hahn-Strasse 6-8 63110 Rodgau Germany Institute of Fluid Mechanics and Aerodynamics Technische Universitat Darmstadt Alarich-Weiss-Strasse 10 64287 Darmstadt Germany Graduate School of Computational Engineering Technische Universitat Darmstadt Dolivostrasse 15 64287 Darmstadt Germany

Our objective is to analyze the atomization processes of a pneumatic atomizer by measuring the size and velocity distributions of droplets in a liquid paint spray. The droplet size and velocity distributions have been determined at different axial positions in the spray; a mathematical description of how these quan- tities vary throughout the spray is then proposed. Additionally, the relative number density of droplets and the relative local mass flux are estimated.

关键词： Pneumatic atomizer Spray Measurement Droplet size profile Droplet velocity profile Time-shift

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CHLORAD: Eradicating Translocon Components from the Outer Membrane of the Chloroplast

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Molecular Plant 2019年第4期12卷 467-469页

作者： Venkatasalam Shanmugabalaji felix Kessler Laboratory of Plant Physiology University of Neuchatel 2000 Neuchatel Switzerland

Around 100 proteins are produced inside the chloroplast but the vast majority must be imported. These proteins are synthesized in the cytosol as preproteins with cleavable targeting sequences. Several plastid types other than chloroplasts exist. During plant development, one plastid type may be converted to another, a process referred to as plastid transition (Jarvis and Lopez-Juez, 2013). During plastid transitions, proteome remodeling occurs, and one set of imported proteins is replaced by another that is functionally adapted (Kleffmann et al., 2007). Moreover, plastid proteomes are known to be regulated in an environmentdependent fashion, and chloroplasts may respond to changing light conditions by regulating the composition and abundance of photosynthetic complexes.

关键词： CHLORAD Eradicating Translocon Components Outer Membrane Chloroplast

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Argon: a novel therapeutic option to treat neuronal ischemia and reperfusion injuries?

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Neural Regeneration Research 2015年第7期10卷 1043-1044页

作者： felix Ulbrich Ulrich Goebel Department of Anesthesiology and Intensive Care Medicine University Medical CenterFreiburg Germany

Neuronal injury and neuroprotection：Ischemia and reperfusion injuries in neuronal cells such as acute ischemic stroke-represent the third leading cause of death in the *** therapeutic concepts mainly aim to re-establ... 详细信息

关键词： a novel therapeutic option to treat neuronal ischemia and reperfusion injuries MCAO NDS OGD

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Strain engineering in single-,bi-and tri-layer MoS_(2),MoSe_(2),WS_(2)and WSe_(2)

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Nano Research 2021年第6期14卷 1698-1703页

作者： felix Carrascoso Hao Li Riccardo Frisenda Andres Castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de MadridConsejo Superior de Investigaciones Cientificas28049MadridSpain

Strain is a powerful tool to modify the optical properties of semiconducting transition metal dichalcogenides like MoS_(2),MoSe_(2),WS_(2) and WSe_(2).In this work we provide a thorough description of the technical details to perform uniaxial strain measurements on these two-dimensional semiconductors and we provide a straightforward calibration method to determine the amount of applied strain with high *** then employ reflectance spectroscopy to analyze the strain tunability of the electronic properties of single-,bi-and tri-layer MoS_(2),MoSe_(2),WS_(2) and WSe_(2).Finally,we quantify the flake-to-flake variability by analyzing 15 different single-layer MoS_(2) flakes.

关键词： two-dimensional(2D)materials transition metal dichalcogenides strain engineering band gap differential reflectance

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Assessing the influence of harvesting intensities on structural diversity of forests in south-west Germany

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Forest Ecosystems 2019年第3期6卷 249-260页

作者： felix Storch Gerald Kadler Jürgen Bauhus Chair of Silviculture University of FreiburgD-79085 FreiburgGermany Department of Biometry Forest Research Institute of Baden-WürttembergD-79100 FreiburgGermany

Background: To increase ecosystem resilience and biodiversity, the maintenance and improvement of structural and compositional diversity of forests has become an important goal in forest management for many forest owners and jurisdictions. At the same time, future harvesting intensity (HI) may increase to meet the demand for woody biomass by an increasing bioeconomy sector. Yet, the influence of HI on forest structural diversity is largely unknown. Here, we address this issue by analyzing the relationship between HI and structural diversity based on large-scale national forest inventory (NFI) data, where the latter is quantified using a previously developed Forest Structure Index and HI is expressed as wood volume removal during the period 2002-2012 for the same inventory plots. Results: Our results show a surprisingly small impact of harvesting intensity on changes in structural diversity for most of the analysed types of forests. Only intense harvesting (> 80%-90% of initial growing stock) led to a significant reduction in structural diversity. At low to moderate HI most aspects of structural diversity were positively influenced. Only the quadratic mean DBH and the volume of large trees (≥ 40 cm DBH) were substantially negatively influenced at HI > 60% and 70% of initial growing stock, respectively. Conclusions: In several forest types, HI could be increased without a reduction in overall structural diversity. Hence, structural diversity in these selectively managed forests appears to be a very resistant forest property in relation to HI. Other indicators at stand and landscape scale may be needed to adjust levels of HI that are suited to maintain forest biodiversity.

关键词： Large-scale inventory Structural diversity index Harvesting intensity Changes in structural diversity

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Security of the Internet Transactions

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计算机科学 2002年第Z1期29卷 83-84,72页

作者： felix Musau College of Information Science & Engineering Central South University Changsha410083

The new generation of networked business solutions brings legacy data and applications to the world wide Web, and lets companies redefine internal and external business processes. The present need for internet transaction has forced many business to adopt the internet forms of distribution of its business items. This has threatened security, hence needs to be given a key priority. This paper alights the key areas on how to protect the information we transact on the internet. It also aims at improving the security of our data and the computers we use to access this data.

关键词： Authentication Cryptography Web secure Transaction server COM

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Heterogeneous populations of neural stem cells contribute to myelin repair

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Neural Regeneration Research 2017年第4期12卷 509-517页

作者： Rainer Akkermann felix Beyer Patrick Küry Neuroregeneration Laboratory Department of NeurologyMedical FacultyHeinrich-Heine-University

As ingenious as nature＇s invention of myelin sheaths within the mammalian nervous system is, as fatal can be damage to this specialized lipid structure. Long-term loss of electrical insulation and of further supportive functions myelin provides to axons, as seen in demyelinating diseases such as multiple sclerosis （MS）, leads to neurodegeneration and results in progressive disabilities. Multiple lines of evidence have demon-strated the increasing inability of oligodendrocyte precursor cells （OPCs） to replace lost oligodendrocytes （OLs） in order to restore lost myelin. Much research has been dedicated to reveal potential reasons for this regeneration deficit but despite promising approaches no remyelination-promoting drugs have successfully been developed yet. In addition to OPCs neural stem cells of the adult central nervous system also hold a high potential to generate myelinating OLs. There are at least two neural stem cell niches in the brain, the subventricular zone lining the lateral ventricles and the subgranular zone of the dentate gyrus, and an additional source of neural stem cells has been located in the central canal of the spinal cord. While a substantial body of literature has described their neurogenic capacity, still little is known about the oligodendrogenic potential of these cells, even if some animal studies have provided proof of their contribution to remyelination. In this review, we summarize and discuss these studies, taking into account the different niches, the heterogeneity within and between stem cell niches and present current strategies of how to promote stem cell-mediated myelin repair.

关键词： heterogeneity oligodendrocyte neuroregeneration multiple sclerosis inhibitors intracellular proteinlocalization adult neural stem cell niche remyelination

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Microstructure and Corrosive Property of Ni-P/nano-CeO_2 Coating Electrolessly Prepared in Acidic Condition

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Journal of Wuhan University of Technology(Materials Science) 2010年第5期25卷 734-737页

作者：靳惠明 A felix M Aroyave College of Mechanical Engineering Yangzhou University College of Materials Engineering National University of Antioquia Medellin 23715 Colombia

Electroless Ni-P/nano-CeO2 composite coating was prepared in acidic condition, and its microstructure and corrosive property were compared with its CeO2-free counterpart. Scanning electronic microscopy （SEM）, transmission electronic microscopy （TEM） and differential scanning calorimeter （DSC） were used to examine surface morphology and microstructure of the coating. Aqueous corrosion was done in 3%NaCl＋5%H2SO4 solution and high temperature oxidation was done at 750 ℃ in air. The results showed that Ni-P coating had partial amorphous structure mixed with nano-crystals, while the Ni-P/CeO2 coating had perfect amorphous structure. At high temperature, Ni3P precipitation and Ni crystallization took place in both coatings at different temperatures. Aqueous corrosion property and high temperature oxidation property of the composite coating were remarkably improved due to the coating＇s microstructure change and the rare earth doping effect. During the co-deposition process, some Ce^n＋（n=3, 4） ions may be adsorbed to metal/solution interface and hinder nickel deposition. Ni-P/CeO2 coating＇s perfect amorphous structure results from the hindered crystal-typed deposition of nickel and the promoted deposition of phosphorous.

关键词： microstructure composite coating electroless plate ceria corrosion

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