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| 1 | 古尔班通古特沙漠春季土壤含水量空间格局显示文摘春季积雪融水是古尔班通古特沙漠土壤水分的重要补给源之一,为早春植物的萌发和生长创造了有利的条件。为掌握该地区春季沙丘的土壤水分分布状况,采用探地雷达测量技术,于2010年4月进行了多次野外测量,并通过对地面直达波信号的提取和分析,初步获得了一致的测量结果。结果表明:(1)探地雷达地面直达波测量的土壤平均含水量与20 cm深同步TDR的测量结果非常接近,两者总体相差在0.02 cm3/cm3以内,充分反映了GPR地面直达波测量结果的有效性和精确性;(2)春季积雪完全融化后,沙丘/沙垄顶部土壤水分明显低于垄间低地,这与前人的研究一致,反映了积雪和冻土层在消融过程中,沙丘表面融水在坡面重力作用下,沿难以透水的冻土层上界自坡上向坡下迁移,形成了垄间最高、坡部次之和垄顶最少的分布格局;(3)垄间低地的土壤水分明显受到低矮灌草丛的影响进行再分布,这是由于积雪最初沿植丛基部开始消融,并以植丛为中心形成漏斗状融洞,从而形成以植丛为中心汇集较多融雪水的格局,而垄间低地中较为高大的梭梭乔木对融雪水的再分布影响明显不如低矮的灌草丛,这与其地表茎基过少有关。此外,探地雷达测量实验提供了详实可靠的表层土壤含水量分布信息,可为荒漠生态系统的空间尺度研究提供真实可靠的数据基础。 | 秦艳芳 陈曦 周可法 孙莉 张捷斌 Patrick Klenk | 2013 | 干旱区地理2013，36，6： | 15 |
| 2 | A concept for multiterawatt fibre lasers based on coherent pulse stacking in passive cavities显示文摘Since the advent of femtosecond lasers,performance improvements have constantly impacted on existing applications and enabled novel applications.However,one performance feature bearing the potential of a quantum leap for high-field applications is still not available:the simultaneous emission of extremely high peak and average powers.Emerging applications such as laser particle acceleration require exactly this performance regime and,therefore,challenge laser technology at large.On the one hand,canonical bulk systems can provide pulse peak powers in the multi-terawatt to petawatt range,while on the other hand,advanced solid-state-laser concepts such as the thin disk,slab or fibre are well known for their high efficiency and their ability to emit high average powers in the kilowatt range with excellent beam quality.In this contribution,a compact laser system capable of simultaneously providing high peak and average powers with high wall-plug efficiency is proposed and analysed.The concept is based on the temporal coherent combination(pulse stacking)of a pulse train emitted from a high-repetition-rate femtosecond laser system in a passive enhancement cavity.Thus,the pulse energy is increased at the cost of the repetition rate while almost preserving the average power.The concept relies on a fast switching element for dumping the enhanced pulse out of the cavity.The switch constitutes the key challenge of our proposal.Addressing this challenge could,for the first time,allow the highly efficient dumping of joule-class pulses at megawatt average power levels and lead to unprecedented laser parameters. | Sven Breitkopf Tino Eidam Arno Klenke Lorenz von Grafenstein Henning Carstens Simon Holzberger Ernst Fill Thomas Schreiber Ferenc Krausz Andreas Tunnermann Ioachim Pupeza Jens Limpert | 2014 | Light(Science & Applications)2014，3，1： | 11 |
| 3 | Geomorphological Evolution Revealed by Aeolian Sedimentary Structure in Badain Jaran Desert on Alxa Plateau, Northwest China显示文摘The Badain Jaran Desert,located in the Alxa Plateau,Northwest China,features mega-dunes and a unique dune-lake alternation landscape.This paper presented the aeolian sediment structures of three representative dunes in the Badain Jaran Desert using ground-penetrating radar (GPR).We processed and analyzed the GPR data and investigated the feasibility of using integrated GPR and sedimentological data to reconstruct dunes structure,sedimentary environment and geomorphological evolution.The results show that the internal structures of star dune and transverse dune represent various stages of mega-dune evolution: the main deposition processes of mega-dune are similar to those of transverse dunes but have a more complicated mechanism of sand transport and deposition because of the superimposition of dunes;the upper section of the mega-dune has a structure similar to that of star dune,with vertical aggradations on top.Diffraction hyperbolae in the GPR profile indicates that the presence of ancient dunes characterized by calcareous cementation layers is involved in the maintenance of mega-dunes,and water levels,shown by continuous,sub-horizontal GPR reflections,are supposed to be closely related to mega-dunes and the interdune lakes.Outcrop of wet sand and horizontal stratifications on the GPR image indicate moisture potentials with different levels inside mega-dunes.The multiplex geomorphology in the Badain Jaran Desert is the result of global climatic undulation,the unique geographical location,the geological structural features,etc. | BAI Yang WANG Nai'ang LIAO Kongtai Patrick KLENK | 2011 | Chinese Geographical Science2011，21，3： | 6 |
| 4 | Exploring new avenues in high repetition rate table-top coherent extreme ultraviolet sources显示文摘The process of high harmonic generation(HHG)enables the development of table-top sources of coherent extreme ultraviolet(XUV)light.Although these are now matured sources,they still mostly rely on bulk laser technology that limits the attainable repetition rate to the low kilohertz regime.Moreover,many of the emerging applications of such light sources(e.g.,photoelectron spectroscopy and microscopy,coherent diffractive imaging,or frequency metrology in the XUV spectral region)require an increase in the repetition rate.Ideally,these sources are operated with a multi-MHz repetition rate and deliver a high photon flux simultaneously.So far,this regime has been solely addressed using passive enhancement cavities together with low energy and high repetition rate lasers.Here,a novel route with significantly reduced complexity(omitting the requirement of an external actively stabilized resonator)is demonstrated that achieves the previously mentioned demanding parameters.A krypton-filled Kagome photonic crystal fiber is used for efficient nonlinear compression of 9 μJ,250 fs pulses leading to,7 μJ,31 fs pulses at 10.7 MHz repetition rate.The compressed pulses are used for HHG in a gas jet.Particular attention is devoted to achieving phase-matched(transiently)generation yielding.10^(13) photons s^(-1)(.50 μW)at 27.7 eV.This new spatially coherent XUV source improved the photon flux by four orders of magnitude for direct multi-MHZ experiments,thus demonstrating the considerable potential of this source. | Steffen Hadrich Manuel Krebs Armin Hoffmann Arno Klenke Jan Rothhardt Jens Limpert Andreas Tunnermann | 2015 | Light(Science & Applications)2015，4，1： | 4 |
| 5 | Angiogenesis, associated by platel/endothelial cell adhesion molecule antibodies as indicator of node metastases and survival in breast cancer显示文摘 | Horak ER Look R Klenk N | 1992 | Lancet1992，340，8828： | 2 |
| 6 | Obesity and incidence of cancer:a large cohort study of over 145,000 adults in Austria显示文摘 | Rapp K Schroeder J Klenk J | 2005 | Br J Cancer2005，93，9： | 1 |
| 7 | Increasing life expectancy in Germany:quantitative contributions from changes in age-and disease-specific mortality显示文摘 | Klenk J Rapp K Buchele G | 2007 | Eur J Public Health2007，17，6： | 1 |
| 8 | Giant cell tumor of bone:risk factors for recurrence 显示文摘 | Klenke FM Wenger DE Inwards CY | 2011 | C lin Onhop Relat Res2011，469，： | 1 |
| 9 | From HLA- B27 to spondyloarthritis: a journey through the ER显示文摘 | Colbert R A Delay M L Klenk E L | 2010 | Immu- nol Rev2010，233，： | 1 |
| 10 | Proteolytic cleavage of the virol glycoprotein and its significance for the virulence of Newcastle disease显示文摘 | Nagai Y Klenk H D | 1976 | Avian Diseases1976，72，： | 1 |
| 11 | Microbially induced sedimentary structures: A new category within the classification of primary sedimentary structures显示文摘 | Noffke N Gerdes G Klenke T | 2001 | Journal of Sedimentary Research2001，71，5： | 1 |
| 12 | Degrada-tion of the multiple branched alkane 2,6,10,14-tetram-ethyl-pentadecane(pristane)in Rhodococcus ruber and My-cobacterium neoaurum显示文摘 | Nhi Cong L T Mikolasch A Klenk H P | 2009 | International Biodeterioration&Biodegradation2009，63，： | 1 |
| 13 | Ebola virus: from dis covery to vaccine 显示文摘 | Feldmann H Jones S Klenk HD | 2003 | Nat Rev Immunol2003，3，8： | 1 |
| 14 | Development of CuInS2-based solar cells and modules显示文摘 | Klenk R Klaer J Koble C | 2011 | Solar Energy Materials and Solar Cells2011，95，6： | 1 |
| 15 | Influenza receptors, polymerase and host range 显示文摘 | Matrosovich M Stech J Klenk H D | 2009 | Rev Sci Tech2009，28，1： | 1 |
| 16 | Influence of having breakfast on cognitive performance and mood in 13 - to 20 - year - old high school students : results of a crossover trial 显示文摘 | Widenhorn - MUller K Hille K Klenk J | 2008 | Pediatrics2008，122，2： | 1 |
| 17 | Activation of influenza A viruses by host proteases from swine airway epithelium显示文摘 | Peitsch C Klenk HD Garten W | 2014 | J Virol2014，88，1： | 1 |
| 18 | Beitrdge zur chemie der lipiodosen 显示文摘 | KLENK E | 1939 | Z Phys Chem1939，262，： | 1 |
| 19 | Tyrosine kinase inhibitor SU6668 represses chondrosarcoma growth via antiangiogenesis in vivo显示文摘 | F·M·Klenke A·Abdollahi E·Bertl | 2007 | BMC Cancer2007，7，： | 1 |
| 20 | Resistin / Fizz3expression in relation to obesity and peroxisome proliferatoractivated receptor-gamma action in human显示文摘 | Savage D B Sewter C P Klenk E S | 2001 | Diabetes2001，50，10： | 1 |
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