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Initial scalar lithospheric magnetic anomaly map of China and surrounding regions derived from CSES satellite data

Science China(Technological Sciences) 2021年第5期64卷 1118-1126页

作者： WANG Jie SHEN XuHui YANG YanYan ZEREN ZhiMa hulot gauthier OLSEN Nils ZHOU Bin MAGNES Werner DE SANTIS Angelo HUANG JianPing GUO Feng LIU WenLong YU JingBo National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China School of Space and Environment Beihang UniversityBeijing 100191China Universitéde Paris Institut de physique du globe de ParisCNRSParis F-75005France DTU Space National Space InstituteTechnical University of DenmarkKongens Lyngby 2800Denmark National Space Science Center Chinese Academy of SciencesBeijing 100190China Space Research Institute Austrian Academy of SciencesGraz 8042Austria Istituto Nazionale di Geofisica e Vulcanologia Via di Vigna MurataRome 605Italy School of Earth Sciences Hebei GEO UniversityShijiazhuang 050031China

The China Seismo-Electromagnetic Satellite(CSES),China’s first satellite to measure geophysical fields with scientific goals in both space and solid earth physics,was launched successfully in February *** carries high-precision magnetometers to measure the geomagnetic *** this study,the CSES magnetic data were used to extract the signal of the lithospheric magnetic field caused by magnetized rocks in the crust and uppermost ***,an along-track analysis of the CSES magnetic data was undertaken near the Bangui magnetic anomaly in central Africa and the Tarim magnetic anomaly in China,demonstrating that the CSES magnetic data are indeed sensitive to the lithospheric magnetic anomaly *** a lithospheric magnetic anomaly map over China and surrounding regions was *** map is consistent with the lithospheric part of the CHAOS-7 *** particular,it clearly reveals four major magnetic anomalies containing long-wavelength signals at the altitude of lowearth-orbiting *** magnetic highs are located over the Tarim,Sichuan and Songliao basin,the origins of which could be related to large-scale tectonic-magmatic activities during geological history.A prominent magnetic low is otherwise found in the southern Himalayan-Tibetan plateau,possibly caused by the shallow Curie depth in this *** further improve the precision of the lithospheric magnetic field model,more detailed data processing and multi-source data merging are needed.

关键词： anomaly lithospheric Himalayan

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张衡一号卫星高精度磁强计及全球地磁场建模应用

张衡一号卫星高精度磁强计及全球地磁场建模应用

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中国地球物理学会地球物理技术委员会第九届学术会议—全域地球物理探测与智能感知学术研讨会

作者：杨艳艳申旭辉 gauthier hulot 泽仁志玛 Pierre Vigneron 周斌 Werner Magnes Nils Olsen Lars T?ffner-Clausen 黄建平张学民袁仕耿王兰炜程炳均 Andreas Pollinger Roland Lammegger 戴建平林军郭峰于靖波王婕吴迎燕赵旭东朱兴鸿应急管理部国家自然灾害防治研究院巴黎地球物理研究所中国科学院国家空间科学中心奥地利科学院空间科学研究所丹麦科技大学中国地震局地震预测研究所东方红卫星有限公司格拉茨技术大学北京特种工程设计研究院中国资源卫星应用中心河北地质大学中国地震局地球物理研究所

2018年2月2日,电磁卫星张衡一号在酒泉发射成功。星上搭载的八载荷之一高精度磁强计,由两个磁通门探头FGM和一个绝对校准装置CDSM组成,能够实现对地磁场矢量(DC～15Hz)和总场(DC～1 Hz)的全球探测。基于张衡一号卫星磁测数据,综合考虑... 详细信息

2018年2月2日,电磁卫星张衡一号在酒泉发射成功。星上搭载的八载荷之一高精度磁强计,由两个磁通门探头FGM和一个绝对校准装置CDSM组成,能够实现对地磁场矢量(DC～15Hz)和总场(DC～1 Hz)的全球探测。基于张衡一号卫星磁测数据,综合考虑地磁内源场、外源场以及磁场年变化,利用球谐分析方法,我们建立了全球地磁场模型CGGM 2020.0。其中内源场求解至15阶,前8阶同时考虑随时间的变化,而外源场包括磁尾电流和环电流,求解至2阶。所有参数通过迭代加权的最小二乘法求解得到。建模结果表明,CGGM 2020.0能够很好的反应地磁场的基本特征,且与IGRF-13及其它入选模型以及CHAOS模型等结果高度一致,表明CGGM 2020.0建模结果可靠。目前,CGGM2020.0已成功入选到新一代国际地磁参考场IGRF-13的计算,本项工作将对CGGM 2020.0建立的具体过程、方法及结果做详细介绍。

关键词：张衡一号 CGGM模型 IGRF模型地磁场空间磁测

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基于张衡一号卫星数据的全球地磁场建模

基于张衡一号卫星数据的全球地磁场建模

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大数据与地球物理——第十六届国家安全地球物理专题研讨会

作者：杨艳艳申旭辉 gauthier hulot 泽仁志玛周斌 Werner Magnes Nils Olsen Lars T?ffner-Clausen Pierre Vigneron 黄建平张学民袁仕耿王兰炜程炳均 Andreas Pollinger Roland Lammegger 戴建平林军郭峰于靖波王婕吴迎燕赵旭东朱兴鸿应急管理部国家自然灾害防治研究院巴黎地球物理研究所中国科学院国家空间科学中心

基于张衡一号卫星磁测数据,我们建立了全球地磁场模型CGGM。该模型能够给出地球主磁场及其变化。本项工作利用张衡一号卫星近21个月的观测数据,介绍了CGGM建立的具体过程、方法及结果。磁场建模采用球谐分析方法,其中内源场求解至15阶,... 详细信息

基于张衡一号卫星磁测数据,我们建立了全球地磁场模型CGGM。该模型能够给出地球主磁场及其变化。本项工作利用张衡一号卫星近21个月的观测数据,介绍了CGGM建立的具体过程、方法及结果。磁场建模采用球谐分析方法,其中内源场求解至15阶,而外源场求解至2阶。所有参数通过迭代加权的最小二乘法求解得到。我们的建模结果表明,CGGM能够很好的反应地磁场的基本特征,且与IGRF-13及其入选模型以及CHAOS模型等结果高度一致,表明CGGM建模结果可靠。

关键词：张衡一号 CGGM 国际地磁参考场

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Young and old forest in the boreal:critical stages of ecosystem dynamics and management under global change

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Forest Ecosystems 2018年第4期5卷 361-375页

作者： Timo Kuuluvainen Sylvie gauthier Department of Forest Sciences University of HelsinkiLatokartanonkaan 7 FIN-00014 HelslnklFinland Natural Resources Canada Canadian Forest ServiceLaurentian Forestry Center1055 rue du P.E.P.S.C.P 10380succ Sainte-FoyQuebecQuebec GIV 4C7Canada.

The circumboreal forest encompasses diverse landscape structures, dynamics and forest age distributions determined by their physical setting, and historical and current disturbance regimes. However, due to intensifying forest utilisation, and in certain areas due to increasing natural disturbances, boreal forest age-class structures have changed rapidly, so that the proportion of old forest has substantially declined, while that of young post-harvest and post-natural-disturbance forest proportions have increased. In the future, with a warming climate in certain boreal regions, this trend may further be enhanced due to an increase in natural disturbances and large-scale use of forest biomass to replace fossil-based fuels and *** major drivers of change of forest age class distributions and structures include the use of clearcut shortrotation harvesting, more frequent and severe natural disturbances due to climate warming in certain regions. The decline in old forest area, and increase in managed young forest lacking natural post-disturbance structural legacies,represent a major transformation in the ecological conditions of the boreal forest beyond historical limits of *** may introduce a threat to biodiversity, ecosystem resilience and long-term adaptive capacity of the forest *** safeguard boreal forest biodiversity and ecosystem functioning, and to maintain the multiple services provided to societies by this forest biome, it is pivotal to maintain an adequate share and the ecological qualities of young postdisturbance stages, along with mature forest stages with old-growth characteristics. This requires management for natural post-disturbance legacy structures, and innovative use of diverse uneven-aged and continuous cover management approaches to maintain critical late-successional forest structures in landscapes.

关键词： Adaptive capacity Biodiversity Boreal forest Climate change Forestry Ecosystem services Forest dynamics Forest management Resilience

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Late-entry commercial thinning effects on Pinus banksiana:growth, yield, and stand dynamics in Québec, Canada

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Journal of Forestry Research 2019年第1期30卷 95-106页

作者： Martin-Michel gauthier Stéphane Tremblay Ministère des Forêts de la Faune et des Parcs du Québec Natural Resources Canada Canadian Forest Service

We studied late-entry commercial thinning effects on growth, yield, and regeneration in a 48-year-old jack pine(Pinus banksiana Lamb.) stand. Applied thinning intensities were 27, 32, and 47% of merchantable basal area(BA) excluding skidding trails. After 15 years, mean diameter at breast height of surviving trees in the 47% BA removal increased by 4.9 cm(25%) compared to the unthinned control. The 47% BA removal also increased gross merchantable volume(GMV) tree-1by 46% compared to the control. The 27% BA removal had twice as much GMV ha-1compared to the 47% BA removal after15 years. Moreover, cumulative GMV ha-1was much higher in the 27% BA removal than in the unthinned control. The highest thinning intensity produced larger trees on average, while the lowest thinning intensity maximized volume production per hectare. Maintenance of acceptable growing stock throughout the 15-year period in the 27% BA removal could provide other ecosystem functions such as biodiversity enhancement or wildlife habitat by delaying senescence. Regeneration data showed that a shift in species composition occurred in the understory. After 15 years, the understory was dominated by black spruce(Picea mariana(Mill.) B.S.P.), white birch(Betula papyrifera Marsh.), and trembling aspen(Populus tremuloides Michx.). If regenerating jack pine is an objective after final overstory removal, additional efforts will be needed to re-establish this species.

关键词： Jack pine Commercial thinning Stand yield Succession Delayed senescence Tree regeneration

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Probing top-quark couplings indirectly at Higgs factories

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Chinese Physics C 2018年第12期42卷 53-65页

作者： gauthier Durieux Jiayin Gu Eleni Vryonidou Cen Zhang DESY Notkestratle 85 D-22607HamburgGermany PRISMA Cluster of Excellence Institut ffir PhysikJohannes Gutenberg-Universitgt55099 MainzGermany Theoretical Physics Department CERN1211 Geneva 23Switzerland Institute of High Energy Physics and School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China

We perform a global effective-field-theory analysis to assess the combined precision of Higgs couplings, triple gauge-boson couplings, and top-quark couplings, at future circular e＋e- colliders, with a focus on runs below the tt-production threshold. Deviations in the top-quark sector entering as one-loop corrections are consistently taken into account in the Higgs and diboson processes. We find that future lepton colliders running at center-of-mass energies below the tt production threshold can still provide useful information on top-quark couplings, by measuring virtual top-quark effects. With rate and differential measurements, the indirect individual sensitivity achievable is better than at the high-luminosity LHC. However, strong correlations between the extracted top-quark and Higgs couplings are also present and lead to much weaker global constraints on top-quark couplings. This implies that a direct probe of top-quark couplings above the t~ production threshold is also helpful for the determination of Higgs and triple-gauge-boson couplings. In addition, we find that below the e＋e- -＋tth production threshold, the top-quark Yukawa coupling can be determined by its loop corrections to all Higgs production and decay channels. Degeneracy with the ggh coupling can be resolved, and even a global limit is competitive with the prospects of a linear collider above the threshold. This provides an additional means of determining the top-quark Yukawa coupling indirectly at lepton colliders.

关键词： effective field theory top quark lepton collider

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A formal approach using SysML for capturing functional requirements in avionics domain

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Chinese Journal of Aeronautics 2019年第12期32卷 2717-2726页

作者： Shaofan ZHU Jian TANG Jean-Marie gauthier Raphael FAUDOU Beijing Aeronautical Science and Technology Research Institute COMACBeijing 102211China Samares-Engineering Blagnac 31700France

In this work,a Model-Based Systems Engineering approach based on Sys ML is *** approach is used for the capture and the definition of functional requirements in avionics *** motivation of this work is triple:guide the capture of functional requirements,validate these functional requirements through functional simulation,and verify efficiently the consistency of these functional *** proposed approach is decomposed into several steps that are detailed to go from conceptual model of avionics domain to a formal functional model that can be simulated in its operating *** achieve this work,a subset of Sys ML has been used as an intermediate modelling language to ensure progressive transformation that can be understood and agreed by system *** concepts are introduced to ensure theoretical consistency of the *** addition,transformation rules are defined and the mappings between concepts of ARP4754 A civil aircraft guidelines and Sys ML are formalized through *** resulting formalization enables engineers to perform functional simulation of the top-level functional architecture extracted from operational ***,the approach has been tested on an industrial avionics system called the Onboard Maintenance System.

关键词： Avionics systems Conceptual model Functional simulation Model-Based Systems Engineering

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Channel adaptive rate control for energy optimization

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第z1期7卷 82-88页

作者： BLANCH Carolina POLLIN Sofie LAFRUIT gauthier EBERLE Wolfgang Interuniversity Microelectronics Center Kapeldreef 75 Leuven 3001Belgium Interdisciplinary Institute for BroadBand TechnologyGent-Ledeberg B-9050Belgium Interuniversity Microelectronics Center Kapeldreef 75 Leuven 3001Belgium Interdisciplinary Institute for BroadBand TechnologyGent-Ledeberg B-9050 Belgium Department of Electrical EngineeringK.U.LeuvenESAT/INSYSBelgium Interuniversity Microelectronics Center Kapeldreef 75 Leuven 3001Belgium

Low energy consumption is one of the main challenges for wireless video transmission on battery limited devices. The energy invested at the lower layers of the protocol stack involved in data communication, such as link and physical layer, represent an important part of the total energy consumption. This communication energy highly depends on the channel conditions and on the transmission data rate. Traditionally, video coding is unaware of varying channel conditions. In this paper, we propose a cross-layer approach in which the rate control mechanism of the video codec becomes channel-aware and steers the instantaneous output rate according to the channel conditions to reduce the communication energy. Our results show that energy savings of up to30% can be obtained with a reduction of barely 0.1 dB on the average video quality. The impact of feedback delays is shown to be small. In addition, this adaptive mechanism has low complexity, which makes it suitable for real-time applications.

关键词： Rate control, Channel condition, Communication energy

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Electrochemical reactivity of In-Pb solid solution as a negative electrode for rechargeable Mg-ion batteries

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Journal of Energy Chemistry 2021年第4期30卷 124-128页

作者： Lucie Blondeau Suzy Surble Eddy Foy Hicham Khodja Magali gauthier UniversitéParis-Saclay CEACNRSNIMBELEEL91191Gif-sur-YvetteFrance UniversitéParis-Saclay CEACNRSNIMBELAPA-IRAMAT91191Gif-sur-YvetteFrance

A composite In-Pb:carbon was successfully synthetized by a two-step mechanochemical synthesis in order to obtain an adequate particles size and structure to investigate the electrochemical reactivity of the In-Pb solid solution towards Mg.A potential synergetic coupling of electroactive elements In and Pb was examined using electrochemical and ex situ X-ray diffraction *** potential profile of the solid solution indicates the formation of Mg_(2)Pb and Mg ***,the diffraction study suggests a peculiar electrochemically-driven amorphization of Mg In during the magnesiation,in strong contrast to Mg In crystallization in In-based and In Bi-based electrodes reported in the *** In and Pb favors the amorphization of Mg In and a high first magnesiation capacity of about 550 m Ah g^(-1),but is thereafter detrimental to the material’s *** results emphasize the possible influence of electrochemically-driven amorphization and crystallization processes on electrochemical performance of battery materials.

关键词： Magnesium battery Negative electrode Alloy Amorphization

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Population genetic structure of the biological control agent Macrolophus pygmaeus in Mediterranean agroecosystems

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Insect Science 2017年第5期24卷 859-876页

作者： Jean-Claude Streito Cecile Clouett Faten Hamdi Nathalie gauthier IRD UMR (INRA/IRDICiradlMontpellier SupAgro) Centre de Biologie pour la Gestion des Populations INRA UMR (INRA/IRDI CiradlMontpellier SupAgro) Centre de Biologie pour la Gestion des Populations 755 avenue du Campus Agropolis CS 30016 34988Montferrier-sur-Lez France

Biological control of agricultural pests relies on knowledge of agroecosystem functionality, particularly when affected by the use of mass-produced biological agents. Incorporating pre- and/or post-release information such as genetic diversity and struc- ture on these agents using molecular-based approaches could advance our knowledge of how they perform in agroecosystems. We evaluated the population genetics of Macrolo- phus pygmaeus, the most widely used predatory mirid against many arthropod pests of greenhouse crops in the Mediterranean region, using the mitochondrial Cytb sequence and microsatellite data, and population genetics and phylogeny approaches. We investigated commercially mass-produced insects （i.e., commercial insects either mass-reared in the laboratory for many generations, or purchased by farmers and released in the greenhouses） and ＂wild＂ insects （i.e., that occur naturally outside or are collected in nature for release in the greenhouses）. The mirids were mainly collected in agroecosystems in which solana- ceous plants are grown in northern Spain, southern France and Greece. Both molecular markers and approaches distinguished 2 genetically differentiated populations. The less genetically diverse population, hereafter named the ＂commercial＂ strain included all indi- viduals from laboratory mass-rearings and most releases of commercially bred individuals. The most genetically diverse population mainly comprised individuals originating from noncultivated environments, or from releases of＂wild＂ individuals. Rare examples of hy- bridization between M. pygmaeus from the 2 populations were observed and asymmetric gene flow was revealed. These findings provide new insights into what happens to M. pyg- maeus released in the agroecosystems we studied, and show that it is possible to monitor some commercial strains.

关键词： biological control commercial vs. wild strains Macrolophus pygmaeus microsatellites mtCytb population genetics

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