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Comparison of three regionalization techniques for predicting streamflow in ungaged watersheds in Nebraska,USA using SwAT model

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International Journal of Agricultural and Biological Engineering 2018年第3期11卷 110-119页

作者： michael w.van liew Aaron R.Mittelstet Department of Biological Systems Engineering University of NebraskaLincolnNE 68583USA

This study compared three approaches,regional averaging,nearest neighbor,and donor techniques,to regionalize parameters in the Soil and water Assessment Tool(SwAT)on eleven watersheds located in the Dissected Plains,Plains,and Rolling Hills Landforms in the eastern portion of the State of Nebraska,*** the Rolling Hills Landform,three watersheds were randomly selected as calibration watersheds while two were randomly selected as validation *** watersheds were randomly selected as calibration watersheds while one was randomly selected as a validation watershed within each of the Dissected Plains and Plains *** seven calibration watersheds were used to provide the necessary calibrated parameter sets to execute each of the regional approaches,while the four validation watersheds were used to assess the impact of applying each of these approaches to an uncalibrated *** Bias(PBIAS)and the Nash Sutcliffe Coefficient of Efficiency(NSE)were used to assess model *** results of this study show that all three methods performed poorly,since the majority of watersheds among each method tested exhibited PBIAS values greater than ±25% and/or NSE values less than 0.50,which were considered to be unsatisfactory in terms of model *** average regionalization,nearest neighbor and donor methods resulted in only four(two calibration and two validation),zero and one satisfactory set of simulated watershed results,*** findings from this study indicate that although each watershed was successfully calibrated with NSE values ranging from 0.51 to 0.84,none of the three regionalization methods provided suitable calibration data sets to define parameter values for performing satisfactory simulations on ungaged watersheds across the eastern Nebraska landscape.

关键词： SwAT model watersheds hydrology model calibration parameter regionalization Nebraska ungaged watersheds

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Climate change impacts on streamflow,water quality,and best management practices for the Shell and Logan Creek watersheds in Nebraska,USA

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International Journal of Agricultural and Biological Engineering 2012年第1期5卷 13-34页

作者： michael w.van liew Song Feng Tapan B.Pathak Department of Biological Systems Engineering University of Nebraska-LincolnNEUSA School of Natural Resources University of Nebraska-LincolnNEUSA

Improvements in the management of water,sediment,and nutrients under future climatic conditions are needed to ensure increased crop and livestock production to meet greater global needs and the future availability of water for competing demands and protection against adverse water quality *** study determined the impacts of future climate change scenarios on streamflow,water quality,and best management practices(BMPs)for two watersheds in Nebraska,*** Soil and water Assessment Tool(SwAT)was employed to simulate streamflow,sediment,total nitrogen(N)and total phosphorus(P)from the Shell Creek watershed near Columbus,Nebraska and the Logan Creek watershed near Sioux City,*** streamflow and water quality records for the two watersheds were used to calibrate model parameters that govern streamflow,sediment,and nutrient responses in *** each watershed,precipitation,air temperature,and CO2 concentrations were input to SwAT for four climatic conditions:a baseline condition for the 1980 to 2000 period and the SRES A2,A1B,and B1 climate scenarios for a future period from 2040 to *** from this study suggest that under the three future climate change scenarios,sediment losses are expected to be about 1.2 to 1.5 times greater than the baseline condition for Shell Creek and 2 to 2.5 times greater for Logan Creek;total N losses are expected to be about 1.2 to 1.4 times greater for Shell Creek and 1.7 to 1.9 times greater for Logan *** to the baseline,total P losses under the future climate scenarios are projected to be about the same for Shell Creek and 1.5 to 1.7 times greater for Logan *** from this study also suggest that future projected increases in both precipitation and CO2 concentration account for net increases in streamflow,but in different ways on each watershed.

关键词： hydrology water quality model calibration climate change SwAT

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Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation

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Research 2022年第4期2022卷 693-705页

作者： Yue Hu Kaili Jiang Kim Meow liew Lu-wen Zhang Department of Engineering Mechanics School of Naval ArchitectureOcean and Civil EngineeringShanghai jiao Tong UniversityShanghai 200240China State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics e Tsinghua-Foxconn Nanotechnology Research CenterTsinghua UniversityBeijing100084China Department of Architecture and Civil Engineering City University of Hong KongKowloonHong Kong SARChina Centre for Nature-Inspired Engineering City University of Hong KongKowloonHong Kong SARChina

Durable dropwise condensation of saturated vapor is of significance for heat transfer and energy saving in extensive industrial *** numerous superhydrophobic surfaces can promote steam condensation,maintaining discrete microdroplets on surfaces without the formation of a flooded filmwise condensation at high subcooling remains ***,we report the development of carbon nanotube array-embedded hierarchical composite surfaces that enable ultra-durable dropwise condensation under a wide range of subcooling(ΔT_(sub)=8 K–38 K),which outperforms existing nanowire *** performance stems from the combined strategies of the hydrophobic nanostructures that allow efficient surface renewal and the patterned hydrophilic micro frames that protect the nanostructures and also accelerate droplet *** synergistic effects of the composite design ensure sustained Cassie wetting mode and capillarity-governed droplet mobility(Bond numberwell as the large specific volume of condensed droplets,which contributes to the enhanced condensation heat *** design provides a feasible alternative for efficiently transferring heat in a vapor environment with relatively high temperatures through the tunable multiscale morphology.

关键词： condensation Highly saturated

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Controllable vortex lasing arrays in a geometrically frustrated exciton-polariton lattice at room temperature

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National Science Review 2023年第1期10卷 196-204页

作者： Jun wang Yutian Peng Huawen Xu Jiangang Feng Yuqing Huang Jinqi wu Timothy C.H.liew Qihua Xiong Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Department of Optical Science and Engineering and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan University State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing Academy of Quantum Information Sciences

Quantized vortices appearing in topological excitations of quantum phase transition play a pivotal role in strongly correlated physics involving the underlying confluence of superfluids,Bose-Einstein condensates and *** polaritons as bosonic quasiparticles have enabled studies of non-e quilibrium quantum gases and ***-polariton condensates in artificial lattices intuitively emulate energy-band structures and quantum many-body effects of condensed matter,underpinning constructing vortex lattices and controlling quantum fluidic ***,we harness exciton-polariton quantum fluids of light in a frustrated kagome lattice based on robust metal-halide perovskite microcavities,to demonstrate vortex lasing arrays and modulate their configurations at room *** energy-momentum spectra unambiguously reveal massless Dirac bands and quenched kinetic-energy flat bands coexisting in kagome lattices,where polariton condensates exhibit prototypical honeycomb and kagome spatial *** coherence investigations illustrate two types of phase textures of polariton condensates carrying ordered quantized-vortex arrays and π-phase shifts,which could be selected when needed using lasing emission *** findings offer a promising platform on which it is possible to study quantum-fluid correlations in complex polaritonic lattices and highlight feasible applications of structured light.

关键词： vortex lasing exciton–polariton lattice Bose–Einstein condensation the orbital angular momentum of light geometric frustration perovskite semiconductor

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Recent Advances in Passive Digital Image Security Forensics： A Brief Review

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Engineering 2018年第1期4卷 29-39页

作者： Xiang Lin Jian-Hua Li Shi-Lin wang Alan-wee-Chung liew Feng Cheng Xiao-Sa Huang School of Cyber Security Shanghai Jiao Tong University Shanghai 200240 China School of Information and Communication Technology Gold Coast Campus Griffith University Southport OLD 4222 Australia

with the development of sophisticated image editing and manipulation tools, the originality and authenticity of a digital image is usually hard to determine visually. In order to detect digital image forgeries, various kinds of digital image forensics techniques have been proposed in the last decade. Compared with active forensics approaches that require embedding additional information, passive forensics approaches are more popular due to their wider application scenario, and have attracted increasing academic and industrial research interests. Generally speaking, passive digital image forensics detects image forgeries based on the fact that there are certain intrinsic patterns in the original image left during image acquisition or storage, or specific patterns in image forgeries left during the image storage or editing. By analyzing the above patterns, the originality of an image can be authenticated. In this paper, a brief review on passive digital image forensic methods is presented in order to provide a comprehensive introduction on recent advances in this rapidly developing research area. These forensics approaches are divided into three categories based on the various kinds of traces they can be used to track—that is, traces left in image acquisition, traces left in image storage, and traces left in image editing. For each category, the forensics scenario, the underlying rationale, and state-of-the-art methodologies are elaborated. Moreover, the major limitations of the current image forensics approaches are discussed in order to point out some possible research directions or focuses in these areas.

关键词： Digital image forensicsImage-tampering detectionMultimedia security

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Analysis and design of steel-concrete composite sandwich systems subjected to extreme loads

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Frontiers of Structural and Civil Engineering 2011年第3期5卷 278-293页

作者： Kazi Md Abu SOHEL Jat Yuen Richard liew Min Hong ZHANG Department of Civil Engineering National University of Singapore Singapore

This paper presents the design guide based on analytical,numerical and experimental investigation of Steel-concrete-steel(SCS)sandwich structural members comprising a lightweight concrete core with density ranged from 1300 to 1445 kg/m3 subjected to static,impact and blast *** performance of lightweight sandwich members is also compared with similar members with normal weight concrete core and ultra high strength concrete core(fc=180 MPa).Novel J-hook shear connectors were invented to prevent the separation of face plates from the concrete core under extreme loads and their uses are not restricted by the concrete core *** and punching are the primary modes of failure under static point *** test results show that the SCS sandwich panels with the J-hook connectors are capable of resisting impact load with less damage in comparison than equivalent stiffened steel plate *** tests with 100 kg TNT were performed on SCS sandwich specimens to investigate the key parameters that affect the blast resistance of SCS sandwich *** yield line method is proposed to predict the plastic capacity and post peak large deflection of the sandwich ***,an energy balanced model is developed to analyze the global behavior of SCS sandwich panels subjected to dynamic load.

关键词： blast load composite structure impact load lightweight concrete sandwich plate J-hook connector

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正交曲线坐标系中单位矢量的时间导数

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大学物理 1992年第4期11卷 46-47页

作者： w.K.Koo Y.C.liew 张学龙江苏淮阴师专

本文给出教学上适用、且便于记忆的一种导出正交曲线坐标系中速度矢量和加速度矢量的方法，这种方法取决于用矩阵形式表示的单位矢量的时间导数．本文还指出单位矢量的空间导数遵循类似的规则．

关键词：曲线坐标系速度加速度矢量导数

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Six novel species of Fusarium from natural ecosystems in Australia

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Fungal Diversity 2016年第2期77卷 349-366页

作者： M.H.Laurence J.L.walsh L.A.Shuttleworth D.M.Robinson R.M.Johansen T.Petrovic T.T.H.Vu L.w.Burgess B.A.Summerell E.C.Y.liew The Royal Botanic Gardens and Domain Trust Mrs Macquaries RdSydneyNSW 2000Australia Faculty of Agriculture and Environment The University of SydneyEveleighNSW 2015Australia

Six new species of Fusarium associated with soil and plant hosts from ecosystems of minimal anthropogenic disturbance in Australia are *** coicis from Coix gasteenii,*** from Xanthorrhoea glauca,*** from soil and Mangifera indica,*** from soil,*** from Sorghum interjectum and *** from soil,Triodia microstachya,Sorghum interjectum and Sorghum *** and phylogenetic analysis of EF-1α,RPB1 and RPB2 sequence data were used to delineate species *** new species were phylogenetically distributed in the Fusarium sambucinum,***,and *** species complexes,and two novel species *** six new species have particular phylogeographic significance as not only do they provide further insight into the geographic patterns of Fusarium evolution but also challenge current phylogeographic hypotheses.

关键词： Species diversity Endophyte Phylogenetics Mycoflora Phylogeography

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超薄高分子材料热管(英文)

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Science Bulletin 2015年第7期60卷 701-706,M0003页

作者： Ryan Lewis Li-Anne liew 徐姗姗李永正杨荣贵 Department of Mechanical Engineering University of Colorado

热管具有远高于大多数金属的导热性能,已被广泛应用于电子元器件的散热方面.由于电子元器件正朝着微型化、薄型化、片式化和高功率等趋势发展,因此散热元件必须同时具备轻薄和高导热系数的特点.本文介绍了一种由高分子材料制造的超薄热... 详细信息

热管具有远高于大多数金属的导热性能,已被广泛应用于电子元器件的散热方面.由于电子元器件正朝着微型化、薄型化、片式化和高功率等趋势发展,因此散热元件必须同时具备轻薄和高导热系数的特点.本文介绍了一种由高分子材料制造的超薄热管的设计和制造过程.其厚度为0.30 mm,大小为2 cm×6 cm,输入功率为9.54 w时,有效传热系数为541 w/(m K).管壳材料为kapton薄膜,吸液芯和蒸汽腔均由光阻SU8组成,光阻SU8柱子的大小和柱子之间的间隔差异为吸液芯提供了毛细血力;另外,通过原子层积电镀,SU8光阻和kapton薄膜都覆盖上一层极薄的Ti O2膜,改善了表面和吸液芯的亲水性能,同时实现了密封.

关键词：聚合物表面地平面超薄微制造壳体材料 SU-8 原子层沉积氧化钛膜

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EMC10 governs male fertility via maintaining sperm ion balance

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Journal of Molecular Cell Biology 2018年第6期10卷 503-514页

作者： Yuchuan Zhou Fei wu Man Zhang Zuquan Xiong Qianqian Yin Yanfei Ru Huijuan Shi Jinsong Li Shanhua Mao Yanliang Li Xinyi Cao Renming Hu Chong wee liew Qiang Ding Xuanchun wang Yonglian Zhang State Key Laboratory of Molecular Biology Shanghai Key Laboratory of Molecular AndrologyCAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China Department of Urology Huashan HospitalFudan UniversityShanghai 200040China State Key Laboratory of Cell Bioloy Shanghai Key Laboratory of Molecular AndrologyCAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China China National Population and Family Planning Key Laboratory of Contraceptive Drugs and Devices Shanghai Institute of Planned Parenthood Research Shanghai 200030China Department of Endocrinology Huashan HospitalFudan UniversityShanghai 200040China Department of Physiology &Biophysics College of MedicineUniversity of lllinois at ChicagoChicagoIL 60612USA

Infertility is a severe public health problem worldwide that prevails up to 15% in reproductive-age couples,and male infertility accounts for half of total *** on genetically modified animal models have identifed lots of genes involved in the pathogenesis of male *** underlying causes,however,remain largely *** this study,we provide evidence that EMCIO,one subunit of endoplasmic reticulum (ER)membrane protein complex (EMC),is required for male ***10 is significantly decreased in spermatozoa from patients with asthenozoospermia and positively associated with human sperm motility. Male mice lacking Emc10 gene are completely ***10-null spermatozoa exhibit multiple defects including abnormal morphology,decreased motility,impaired capacitation,and impotency of acrosome reaction,thereby which are incapable of fertilizing intact or ZP-free ***,intracytoplasmic sperm injection could rescue this defect caused by EMC10 deletion. Mechanistically,EMC10 deficiency leads to inactivation of Na/K-ATPase,in turn giving rise to an increased level of intraceltutar Na^+ in spermatozoa,which contributes to decreased sperm motility and abnormal *** mechanistic investigations demonstrate that the absence of EMC10 results in a reduction of HCO3^- entry and subsequent decreases of both cAMP-dependent protein kinase A substrate phosphorylation and protein tyrosine *** data demonstrate that EMC10 is indispensable to mate fertility via maintaining sperm ion balance of Na^+ and HCO3^-,and also suggest that EMC10 is a promising biomarker for male fertility and a potential pharmaceutical target to treat male infertility.

关键词： Emc10 knockout sperm maturation male infertility ion imbalance Na/K-ATPase

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