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环保绝缘气体介电强度预测方法评估

电工技术学报 2023年第S1期38卷 214-221页

作者：周文俊邱睿郑宇 pascal brault 电网环境保护全国重点实验室(武汉大学) 武汉430072 武汉大学电气与自动化学院武汉430072 法国国家科学研究中心-奥尔良大学GREMI实验室奥尔良45067

为明确各类气体介电强度预测方法的准确性,基于9种气体(N_(2)、CO_(2)、N_(2)O、CF_(4)、SO_(2)F_(2)、c-C_(4)F_(8)、C_(3)F_(8)、C_5F_(10O)和C_(4)F_(7)N)在50 Hz工频交流电场下测得的相对介电强度对5种预测方法进行了评估。结果表明,各方法预测准确性与其给出的可决系数R~2不一致。这主要与其使用的样本数据测试条件不统一、同一气体的相对介电强度不一致有关。当修正上述问题后,各方法准确性得到提升,并与其R~2相符。分子参数的丰富和放电理论的介入可使预测方法准确性提升。使用样本外气体进行验证的方法,其预测结果在修正前后都具有较高的准确性;使用基团贡献法的预测方法也具有上述特性。通过上述评估结果可知,样本中的气体数据需在统一条件下获得,并根据试验条件和样本分子特征确定预测方法的适用范围。放电理论、分子几何特征和新分子参数的引入有助于提高预测模型的准确性。模型验证和基团贡献法可提高预测方法对样本数据的包容性。

关键词：环保绝缘气体介电强度预测构效关系(QSPR) 气体绝缘输电管道(GIL)

X-ray diffraction study of effect of deposition conditions on α-β phase transition and stress evolution in sputter-deposited W coatings

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Chinese Physics B 2006年第2期15卷 432-436页

作者：王聪 brault pascal Pineau Alain Plantin pascale Thomann Anne-Lise Groupie de Recherches sur I'Energétique des Milieux Ionisés UMR6606 -CNRS Ecole Polytechnique de I'Université d'Orléans BP6744 Université d'Orléans F-45067 Orléans Cedex 2 France School of Science Beijing University of Astronautics and Aeronautics Beijing 100083 China Centre de Recherches sur la Matière Divisée - UMR 6619 CNRS - Université d'Orléans 1B rue de la Férollerie 45071 Orldans Cedex 2 France

Pure W and W-Cu-W trilayer coatings were deposited on an Fe substrate by d.c. magnetron sputtering. The α-β phase evolution, intragranular stress evolution in sputter-deposited W layer were investigated by x-ray diffraction. They are directly related to the film microstructure, density and adhesion. Therefore, control of the film stress and phase component transition is essential for its applications. The phase component transition from β-W to α-W and intragranular stress evolution from tensile to compressive strongly depend on the deposition parameters and can be induced by lowering Ar pressure and rising target power. The compressively stressed films with α-W phase have a dense microstructure and high adhesion to Fe substrate.

关键词： W coatings x-ray diffraction α-β phase component transition thin film stress

Long-COVID-19: the persisting imprint of SARS-CoV-2 infections on the innate immune system

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Signal Transduction and Targeted Therapy 2024年第1期9卷 12-13页

作者： Marianne Boes pascal Falter-Braun Center for Translational Immunology and Department of Pediatric Immunology University Medical Center UtrechtUtrecht UniversityUtrechtThe Netherlands Institute of Network Biology(INET) Molecular Targets and Therapeutics Center(MTTC)Helmholtz MunichNeuherbergGermany Microbe-Host Interactions Faculty of BiologyLudwig-Maximilians-Universität MünchenPlanegg-MartinsriedGermany

In a recent Cell publication,Cheong et *** how COVID-19 causes IL-6 induced epigenetic reprogramming of human immune stem cells,which causes lasting alterations in the composition and response characteristics of circulating immune cells.1 The study provides important insights into the mechanisms by which SARSCoV-2 infections impact the human immune system and is an important hook into unraveling the mechanisms of post-acute sequelae of COVID-19(PASC)commonly referred to as longCOVID.

关键词： system COV programming

On-the-fly precision spectroscopy with a dual-modulated tunable diode laser and Hz-level referencing to a cavity

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Advanced Photonics 2024年第4期6卷 36-44页

作者： Shuangyou Zhang Toby Bi pascal Del’Haye Max Planck Institute for the Science of Light ErlangenGermany Friedrich-Alexander Universität Erlangen-Nürnberg Department of PhysicsErlangenGermany

Advances in laser spectroscopy have enabled many scientific breakthroughs in physics,chemistry,biology,and *** frequency combs pushed measurement limits with ultrahigh-frequency accuracy and fast-measurement speed,while tunable-diode-laser spectroscopy is used in scenarios that require high power and continuous spectral *** these advantages of tunable-diode-laser spectroscopy,it is challenging to precisely determine the instantaneous laser frequency because of fluctuations in the scan ***,we demonstrate a simple spectroscopy scheme with a frequencymodulated diode laser that references the laser on-the-fly to a fiber *** fiber cavity's free spectral range is on-the-fly calibrated with sub-10-Hz frequency *** achieve a relative precision of the laser frequency of 2×10^(-8)for an 11-THz frequency range at a measurement speed of 1 THz∕*** is an improvement of more than 2 orders of magnitude compared to existing diode-laser-spectroscopy *** scheme provides precise frequency calibration markers,while simultaneously tracking the instantaneous scan speed of the *** demonstrate the versatility of our method through various applications,including dispersion measurement of a fiber,ultrahigh-Q microresonators,and spectroscopy of a hydrogen fluoride gas *** simplicity,robustness,and low cost of this spectroscopy scheme are valuable for out-of-the-lab applications like lidar and environmental monitoring.

关键词： tunable laser spectroscopy radio-frequency modulation integrated photonics gas spectroscopy frequency comb

TRADE DEPENDENCIES AND TRANSACTION COSTS: THE OC-CUPATION OF DECELEA HIGHLIGHTS BOTH THE BENEFITS AND THE DRAWBACKS OF A MARITIME ECONOMY

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Journal of Ancient Civilizations 2024年第1期39卷 29-50,123页

作者： pascal Warnking Trier University and LEIZA

Thucydides asserts that the occupation of Decelea by the Spartans in 413 BC made the grain supply for Athens costly by forcing the transport from land onto the *** calls into question the well-established consensus that sea transport was far cheaper than land *** paper contends that the cost of protecting supply lines-specifically the expenses associated with the warships which escorted the supply ships-rendered the grain transported on the new route exceptionally *** this paper,the benefits and drawbacks of a maritime economy,including transaction costs,trade dependencies,and the capabilities of warships and supply ships are discussed.

关键词： convoy Decelea maritime dependencies maritime economy sea routes shipping costs transaction costs

An inverse method for characterization of dynamic response of 2D structures under stochastic conditions

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Chinese Journal of Aeronautics 2024年第3期37卷 440-455页

作者： Xuefeng LI Abdelmalek ZINE Mohamed ICHCHOU Noureddine BOUHADDI pascal FOSSAT Laboratory of Tribology and Systems Dynamic Central School of LyonEcully 69134France Institut Camille Jordan Central School of LyonEcully 69134France Department of Applied Mechanics University of Burgundy Franche-ComtéBesancon 25000France

The reliable estimation of the wavenumber space(k-space)of the plates remains a longterm concern for acoustic modeling and structural dynamic behavior *** current analyses of wavenumber identification methods are based on the deterministic *** this end,an inverse method is proposed for identifying wave propagation characteristics of twodimensional structures under stochastic conditions,such as wavenumber space,dispersion curves,and band *** proposed method is developed based on an algebraic identification scheme in the polar coordinate system framework,thus named Algebraic K-Space Identification(AKSI)***,a model order estimation strategy and a wavenumber filter are proposed to ensure that AKSI is successfully *** main benefit of AKSI is that it is a reliable and fast method under four stochastic conditions:(A)High level of signal noise;(B)Small perturbation caused by uncertainties in measurement points’coordinates;(C)Non-periodic sampling;(D)Unknown structural *** validate the proposed method,we numerically benchmark AKSI and three other inverse methods to extract dispersion curves on three plates under stochastic *** experiment is then performed on an isotropic steel *** investigations demonstrate that AKSI is a good in-situ k-space estimator under stochastic conditions.

关键词： Inverse method Dispersion relation Wavenumber space Periodic plates Stochastic conditions Wave propagation characterization

Modelling of the variation of granular base materials resilient modulus with material characteristics and humidity conditions

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Journal of Road Engineering 2024年第1期4卷 27-35页

作者： Jean-pascal Bilodeau Erdrick Leandro Perez-Gonzalez Ali Saeidi Departement de Genie Civil et Genie des Eaux Universite LavalQuebecG1V 0A6Canada Departement des Sciences Appliquees Universite du Quebeca ChicoutimiChicoutimiG7H 2B1Canada

This study aims to quantify the susceptibility of granular materials used in pavements to changes in moisture content and propose a correlation model to incorporate this susceptibility into seasonal *** fines content and the percentage of fractured coarse aggregates were identified as direct indicators of the resilient modulus susceptibility to changes in water *** results showed that the percentage of fractured coarse aggregates particles(FR)has a more significant impact on the resilient modulus(Er)of crushed granular materials used in pavement construction than the combined indicator of the fines content and sample volumetrics(nf).Crushed granular materials with a higher percentage of fractured coarse aggregates are relatively insensitive to changes in the degree of saturation,but become more sensitive as the fine fraction porosity *** adjusted model was proposed based on the existing formulation,but considers a complex parameter to describe and adjust the sensitivity of base granular materials to variations in moisture content with respect to fabrication charac-teristics,fines content and volumetric *** model shows that the variation of Er values is below10%for fully crushed granular ***,it reaches approximately±12%for materials with 75%of crushed coarse aggregates andþ40%and-25%for materials with FR=50%.This model could help select good ag-gregates characteristics and adjust grain-size distribution for environments where significant moisture content variations can occur in the pavement system,such as in the Province of Quebec(Canada).As it is based on pa-rameters that can be easily determined or estimated,it also represents a valuable tool for detailed design and analysis that can consider material characteristics.

关键词： Resilient modulus Degree of saturation Humidity conditions Unbound granular materials Pavement base

Defense and senescence interplay in legume nodules

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Plant Communications 2024年第4期5卷 112-126页

作者： Fathi Berrabah Farouk Benaceur Chaoyan Yin Dawei Xin Ke´vin Magne Marie Garmier Veronique Gruber pascal Ratet Faculty of Sciences University Amar Telidji03000 LaghouatAlgeria Research Unit of Medicinal Plants(RUMP) National Center of Biotechnology ResearchCRBt25000 ConstantineAlgeria Universite´Paris-Saclay CNRSINRAEUniversity of EvryInstitute of Plant Sciences Paris-Saclay(IPS2)91190 Gif-sur-YvetteFrance Universite´Paris Cite´ Institute of Plant Sciences Paris-Saclay(IPS2)91190 Gif-sur-YvetteFrance Key Laboratory of Soybean Biology in the Chinese Ministry of Education College of AgricultureNortheast Agricultural UniversityHarbin 150030China These authors contributed equally to this article.

Immunity and senescence play a crucial role in the functioning of the legume symbiotic *** miss-regulation of one of these processes compromises the symbiosis leading to death of the endosymbiont and the arrest of the nodule *** relationship between immunity and senescence has been exten-sively studied in plant organs where a synergistic response can be ***,the interplay be-tween immunity and senescence in the symbiotic organ is poorly discussed in the literature and these phe-nomena are often mixed *** studies revealed that the cooperation between immunity and senescence is not always observed in the nodule,suggesting complex interactions between these two pro-cesses within the symbiotic ***,we discuss recent results on the interplay between immunity and senescence in the nodule and the specificities of this relationship during legume-rhizobium symbiosis.

关键词： immunity senescence symbiosis nodules legumes rhizobia

Substrate topography as a powerful tool to modify glial cell biology and interactions

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Neural Regeneration Research 2025年第5期20卷 1390-1391页

作者： pascal Achenbach Haktan Altinova Gary A.Brook Institute of Neuropathology RWTH Aachen University Hospital Department of Neurosurgery RWTH Aachen University Hospital Aachen Germany Berlin State Office for Health and Social Affairs(LAGeSo) BerlinGermany

Traumatic injuries to the central nervous system(CNS) result in disruption of the intricate network of axons which connect functionally related neurons that are widely distributed throughout the brain and spinal *** normal conditions,maintenance of this complex system is structurally and functionally supported by astrocytes (ACs)and other glial cells,the processes of which form a framework surrounding neuronal cell bodies,dendrites,axons,and synapses.

关键词： injuries topography system