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Possible controlling factors in the development of seasonal sand wedges on the Ordos Plateau,North China

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Research in Cold and Arid Regions 2021年第2期13卷 167-176页

作者： hugh mfrenchψ Jef Vandenberghe HuiJun Jin RuiXia He Departments of Geography and Earth Sciences University of OttawaOntarioCanadaDepartment of GeographyUniversity of VictoriaBritish ColumbiaCanada Institute of Earth Sciences Vrije Universiteit AmsterdamThe Netherlands School of Civil Engineering Institute of Cold-Regions EngineeringScience and TechnologyNortheast-China Observatory and Research-Station of Permafrost Geo-Environment-Ministry of EducationNortheast Forestry UniversityHarbinHeilongjiang150040China State Key Laboratory of Frozen Soils Engineering and Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhouGansu 730000China

Wedge-like structures filled with silty sand penetrate Quaternary fluvial and aeolian sediments and, in places, Tertiary bedrock on the Ordos Plateau, North China. The wedges reflect thermal contraction cracking of either permafrost or seasonal frost during the Late Pleistocene and early Holocene. Wedges of about 1 m in depth form polygonal nets of 2-3 m in diameter(type B). They contrast with wedges of 3-4 m in depth that form polygons of 10-15 m in diameter(type A).This review focuses upon the highly variable size of the inferred polygon nets and discusses the problem of differentiating between seasonally and perennially frozen ground, or between seasonal frost and permafrost.

关键词： frozen ground sand-wedge casts frost fissures thermal contraction cracking seasonal frost cracking desiccation cracking

The challenge of biomimetic design for carbon-neutral buildings using termite engineering

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Insect Science 2010年第2期17卷 154-162页

作者： John R.J. french Berhan m. Ahmed (Shiday) Faculty of Science Health and Education University of the Sunshine Coast Maroochydore DC QId 4558 Department of Forest and Ecosystem Science The University of Melbourne 500 Yarra Boulevard Richmond Vic 3121 Australia

The main aim of this paper is to present humanity and termites as design partners in the creation of a new dimension of ecosystem understanding. The paper by Turner and Soar, Beyond biomimicry： What termites can tell us about realizing the living building＂（2008） opens up a new era in how we think of human habitations, not only on earth, but perhaps on other planets, and using the termite model as the comer stone of innovative engineering. We know that termites are masters of constructing ＇buildings＇ that meet all nutrition, energy, waste disposal needs, shelter, and food sources for many other animals and insects. We need to emulate the symbiotic abilities of termites to survive over time, for we all live on this symbiotic planet, and symbiosis is natural and common.

关键词： biomimicry ecosystem engineering living building symbiotic termites

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宽带卫星服务在亚洲的发展趋势

卫星与网络 2008年第8期 38-40页

作者： Patrick m.french 宋青（翻译）不详中国卫星通信集团公司

NSR(Northern Sky Research)公司为评估宽带卫星服务发展趋势,分别从企业IP VSAT宽带网络应用、单点接收用户(卫星宽带典型应用)和卫星IP中继应用这3部分进行了考察。这些应用都来自基于IP的典型用户,包括大型企业、政府和非政府组织、... 详细信息

NSR(Northern Sky Research)公司为评估宽带卫星服务发展趋势,分别从企业IP VSAT宽带网络应用、单点接收用户(卫星宽带典型应用)和卫星IP中继应用这3部分进行了考察。这些应用都来自基于IP的典型用户,包括大型企业、政府和非政府组织、中小型企业、个人用户、SOHO一族和ISP服务商。以下市场趋势的调查研究来源于NSR公司的《全球卫星需求调查(第4版)》和《宽带卫星市场研究(第6版)》。

关键词： ISP服务商宽带卫星发展趋势非政府组织亚洲网络应用个人用户大型企业

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布拉德伯里工作坊综合体

世界建筑导报 2024年第2期39卷 126-128,F0003页

作者： maegan Icke Elena Gruber Roxani Tseranidou margherita Zompa Carolina Borgatti Ezmira Peraj Ainhoa Valle french+Tye(摄影) 不详

布拉德伯里工作坊综合体建筑位于达尔斯顿吉勒特广场,现已重新向新老租户开放。新大楼涵盖600平方米经济适用工作空间的翻新、10个迷你零售单元的更换,以及在两层扩建部分中打造近500平方米的额外工作区域。布拉德伯里工作坊综合体是该... 详细信息

布拉德伯里工作坊综合体建筑位于达尔斯顿吉勒特广场,现已重新向新老租户开放。新大楼涵盖600平方米经济适用工作空间的翻新、10个迷你零售单元的更换,以及在两层扩建部分中打造近500平方米的额外工作区域。布拉德伯里工作坊综合体是该地区以社区为中心、最独特的公共空间,代表了该建筑类型发展历程的未来。

关键词：工作坊扩建部分公共空间综合体发展历程

Further investigation on the fusion of ^(6)Li with ^(209)Bi target at near-barrier energies

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Chinese Physics C 2024年第7期48卷 106-117页

作者：张高龙焦振威张广鑫 m.R.Cortes 胡世鹏钱建强 D.mengoni 屈卫卫李聪博郑云张焕乔孙慧斌王楠张春雷 J.J.Valiente-Dobón D.Testov m.mazzocco A.Gozzelino C.Parascandolo D.Pierroutsakou m.La Commara A.Goasduff D.Bazzacco D.R.Napoli F.Galtarossa F.Recchia A.Illana S.Bakes I.Zanon S.Aydin G.de Angelis m.Siciliano R.menegazzo S.m.Lenzi J.L.Ferreira J.Rangel Serkan Akkoyun L.F.Canto J.Lubian School of Physics Beihang UniversityBeijing 100191China Sino-french Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de Física Universidade Federal Fluminense24210-340NiteróiRio de JaneiroBrazil Institute for Advanced Study in Nuclear Energy&Safety Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Research and manufacture of High Purity Germanium materials and Fetectors Shenzhen UniversityShenzhen 518060China INFN Sezione di PadovaPadovaItaly Dipartimento di fisica Astronomia dell'Universita di padova PadovaItaly State Key Laboratory of Radiation medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China China Institute of Atomic Energy Beijing 102413China The Key Laboratory of Beam Technology and material modification of ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China INFN Laboratori Nazionali di LegnaroI-35020 LegnaroItaly INFN Sezione di NapoliI-80126 NapoliItaly Dipartimento di Farmacia Universitàdi Napoli"Federico II"I-80131 NapoliItaly Department of Natural and mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkiye Physics Division Argonne National LaboratoryLemont-ILUSA Departamento de matemaética Física e Computaç˜ao Universidade do Estado do Rio de JaneiroFaculdade de Tecnologia27537-000ResendeRio de JaneiroBrazil Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de Física Universidade Federal do Rio de JaneiroCP 6852821941-972Rio de JaneiroBrazil

The complete and incomplete fusion cross sections for ^(6)Li+^(209)Bi were measured using the in-beamγ-ray method around the Coulomb *** cross sections of(deuteron captured)incomplete fusion(ICF)products were re-quantified experimentally for this reaction *** results reveal that the ICF cross section is equivalent to that of complete fusion(CF)above the Coulomb barrier and dominant near or below the Coulomb barrier.A theoretical calculation based on the continuum discretized coupled channel(CDCC)method was performed for the aforementioned CF and ICF cross sections;the result is consistent with the *** universal fusion function(UFF)was also compared with the measured CF cross section for different barrier parameters,demonstrating that the CF suppression factor is significantly influenced by the choice of potential,which can reflect both dynamic and static effects of breakup on the fusion process.

关键词： cross section incomplete fusion suppression factor weakly bound nuclei

molecular identification and population dynamics of two species of Pemphigus （Homoptera： Pemphidae） on cabbage

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Insect Science 2009年第2期16卷 115-124页

作者： Naiqi Chen Tong-Xian Liu mamoudou Setamou J. Victor french Eliezer S. Louzada Department of Entomology Texas AgriLife Research Texas A&M University System Weslaco Citrus Center Texas A&M University- Kingsville Citrus Center Weslaco TX 78596 USA

The poplar petiole gall aphid, Pemphiguspopulitransversus Riley, has been one of the major pests on cruciferous vegetable in the Rio Grande Valley （LRGV） of Texas since the late 1940s. It normally migrates from poplar trees to cruciferous vegetables in the fall, and migrates back to the trees in early spring of the coming year. Some root-feeding aphids were found on cruciferous vegetables in late spring and early summer in 1998 and the following years. Those aphids have been identified as Pemphigus obesinymphae moran. This discovery completely changed the current knowledge about the root-feeding aphids on cruciferous vegetables in the LRGV. Due to their small size, morphological and feeding similarities between P. populitransversus and P. obesinymphae, their identification and distinction are difficult. In this study, random amplification of polymorphic DNA （RAPD） and amplified fragment length polymorphism （AFLP） were used to distinguish these two species over a period of time when the two species occurred together, or separately, in cabbage fields. The two species occurred on cabbage at different times of the year, and overlapped from October to June. From may to October, both species migrated to their primary hosts. The apterous aphids found on cabbage in winter contained mainly P. obesinymphae, whereas in early spring more apterous P. populitransversus were recovered. The root-feeding aphids would feed on cabbage plants as long as this host was available even during the hot, dry summer in the LRGV, although their populations were generally low. Both RAPD and AFLP techniques were efficient in discriminating the two species that showed obviously genetic variability. These molecular techniques confirmed the existence of the two aphid species in apterous samples collected from the soil in cabbage fields in the LRGV, and the results performed by RAPD were confirmed by AFLP. Furthermore, the results suggest that RAPD technique was a better choice despite its reproducib

关键词： AFLP cabbage identification RAPD root aphid

Crustal magnetization of mars: Terra meridiani and Terra Sirenum

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Journal of modern Physics 2017年第8期8卷 1275-1293页

作者： Renee A. french Donna m. Jurdy Department of Earth and Planetary Sciences Northwestern University Evanston IL USA

We examine the crustal magnetization of Terra meridiani and Terra Sirenum, the region representing the strongest magnetization in the Southern Hemisphere, by downward continuing mapping level data (400 km altitude) from the mars Global Surveyor (mGS) magnetometer and Electron Reflectometer (mAG/ER). We find that the surface magnetization in both regions can be fit with a small number of sources, with the positive sources stronger than negative ones in both regions. The ratio of the strongest positive to strongest negative source for the regions matches within 2%. For both regions, the locations of strong sources are positioned at the outer rings of ancient impact features. We employ two approaches of source depth estimation. One method employs downward continuation of positive and negative sources from mapping level into the subsurface to extrapolate the depth to magnetization. With this approach, source depths generally range from 80 ±20 km in Terra meridiani and 65 ±25 km in Terra Sirenum. A graphical approach uses the contour map of surface magnetization to estimate depths ranging from 125 km for thick sources in Terra meridiani and from 82 km for thick sources in Terra Sirenum. These depths require a low (≤∼20 mW/m2) martian heat flux to permit magnetite, hematite, and/or pyrrhotite (although limited) as carriers through 100 km or more. The upcoming InSight mission will provide invaluable seismic constraints on both crustal and core structure, in addition to the first martian heat flow measurements that will constrain magnetization.

关键词： mars Crustal magnetization magnetization Depth InSight mission Geophysics

A Preliminary Comparative Study on the Centering Algorithms for CassiniISS NAC Images

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Research in Astronomy and Astrophysics 2024年第10期24卷 58-65页

作者： T.Liang Q.-F.Zhang G.-m.Liu W.-H.Zhu C.-S.Wang Department of Computer Science Jinan UniversityGuangzhou 510632China Sino-french Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China School of Computer Science Guangdong University of EducationGuangzhou 510303China

Obtaining high precision is an important consideration for astrometric studies using images from the Narrow Angle Camera(NAC)of the Cassini Imaging Science Subsystem(ISS).Selecting the best centering algorithm is key to enhancing astrometric *** this study,we compared the accuracy of five centering algorithms:Gaussian fitting,the modified moments method,and three point-spread function(PSF)fitting methods(effective PSF(ePSF),PSFEx,and extended PSF(x PSF)from the Cassini Imaging Central Laboratory for Operations(CICLOPS)).We assessed these algorithms using 70 ISS NAC star field images taken with CL1 and CL2 filters across different stellar *** ePSF method consistently demonstrated the highest accuracy,achieving precision below 0.03 pixels for stars of magnitude *** to the previously considered best,the modified moments method,the e PSF method improved overall accuracy by about 10%and 21%in the sample and line directions,***,the xPSF model provided by CICLOPS had lower precision than the ***,the ePSF exhibits an improvement in measurement precision of 23%and 17%in the sample and line directions,respectively,over the *** discrepancy might be attributed to the xPSF focusing on photometry rather than *** findings highlight the necessity of constructing PSF models specifically tailored for astrometric purposes in NAC images and provide guidance for enhancing astrometric measurements using these ISS NAC images.

关键词： methods:analytical techniques:image processing stars:imaging astrometry

One-neutron stripping process in the^(209)Bi(^(6)Li,^(5)Li)^(210)Bi*reaction reaction

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Nuclear Science and Techniques 2024年第6期35卷 120-129页

作者： Gao-Long Zhang Zhen-Wei Jiao Guang-Xin Zhang E.N.Cardozo B.Paes Shi-Peng Hu Jian-Qiang Qian Daniele mengoni Wei-Wei Qu Cong-Bo Li Yun Zheng Huan-Qiao Zhang Hui-Bin Sun Nan Wang Chun-Lei Zhang J.J.Valiente-Dobón D.Testov m.mazzocco A.Gozzelino C.Parascandolo D.Pierroutsakou m.La Commara A.Goasduff D.Bazzacco D.R.Napoli F.Galtarossa F.Recchia A.Illana S.Bakes I.Zanon S.Aydin Gde Angelis m.Siciliano R.menegazzo S.m.Lenzi S.Akkoyun L.F.Canto J.Lubian School of Physics Beihang UniversityBeijing 100191China Sino-french Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de Física Universidade Federal Fluminense24210-340 NiteróiRio de JaneiroBrazil Laboratorio TANDAR Comisión Nacional de Energía AtómicaBKNA1650 San MartíınArgentina Institute for Advanced Study in Nuclear Energy and Safety Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Research and manufacture of High Purity Germanium materials and Fetectors Shenzhen UniversityShenzhen 518060China INFN Sezione di PadovaPaduaItaly Dipartimento di fisica Astronomia dell’Universita di padova PaduaItaly State Key Laboratory of Radiation medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China China Institute of Atomic Energy Beijing 102413China The Key Laboratory of Beam Technology and material modification of ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Laboratori Nazionali di Legnaro INFN35020 LegnaroItaly INFN Sezione di Napoli80126 NaplesItaly Dipartimento di Farmacia Universitàdi Napoli“Federico II”80131 NaplesItaly Department of Natural and mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkey Physics Division Argonne National LaboratoryLemontILUSA Department of Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de Física Universidade Federal do Rio de JaneiroRio de Janeiro CP 6852821941-972Brazil

One-neutron stripping process between^(6)Li and^(209)Bi was studied at 28,30,and 34 meV using the in-beamγ-ray spectroscopy ***γ-γcoincident analysis clearly identified twoγ-rays feeding the ground and long-lived isomeric states,which were employed to determine the cross *** one-neutron stripping cross sections were similar to the cross sections of complete fusion in the^(6)Li+^(209)Bi system,but the one-neutron stripping cross sections decreased more gradually at the sub-barrier region.A coupled-reaction-channel calculation was performed to study the detailed reaction mechanism of the one-neutron stripping process in^(6)*** calculations indicated that the first excited state of 5 Li is critical in the actual one-neutron transfer mechanism,and the valence proton of 209Bi can be excited to the low-lying excited state in(^(6)Li,^(5)Li)reaction,unlike in the(d,p)reaction.

关键词： Transfer reaction Weakly bound nuclei Cross section