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Land cover change and eco-environmental quality response of different geomorphic units on the Chinese Loess Plateau

Journal of Arid Land 2020年第1期12卷 29-43页

作者： SONG Yongyong XUE Dongqian DAI Lanhai WANG Pengtao HUANG Xiaogang XIA Siyou School of Geography and Tourism Shaanxi Normal UniversityXi'an 710119China School of Tourism&Research institute of Human Geography Xi'an International Studies UniversityXi'an 710128China School of Geography Science Nanjing Normal UniversityNanjing 210023China

Land cover in the Chinese Loess Plateau has undergone dramatic changes since the late *** the trend in land cover change and eco-environmental quality response of different geomorphic units in this stage is a realistic requirement for promoting sustainable development of the Chinese Loess *** on the data of geomorphic units and land cover in 1990,2000,2010 and 2018 of the Chinese Loess Plateau,we studied the trend of land cover change and eco-environmental quality response of different geomorphic units by using a significance index of land cover change,a proportion index of land cover change and an eco-environmental response *** results indicated that from 1990 to 2018,the areas of forestland and construction land substantially increased,whereas those of cropland,grassland,wetland and unused land considerably *** cover change exhibited large geomorphic differences,and the main conversion of land cover was from cropland into other land *** trend of land cover change in the loess tablelands and sandy loess hills declined,whereas the unstable trends in the other geomorphic units ***-environmental quality varied among different geomorphic *** expansion of construction land and degradation of forestland,grassland and wetland resulted in the deterioration of eco-environmental *** conversion of cropland and unused land into forestland and grassland,and the conversion of grassland into forestland were the main factors that drove the improvement of eco-environmental *** findings of this study may provide theoretical reference and support decision making for the optimization of land use structure and the improvement of eco-environmental quality on the Chinese Loess Plateau.

关键词： cropland degradation eco-environmental quality index grassland human activity unused land relative ecological value

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Metre-size single-crystal graphene becomes a reality

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Science Bulletin 2017年第15期62卷 1039-1040页

作者： Hui-Ming Cheng Tsinghua-Berkeley Shenzhen institute Tsinghua University Shenzhen 518055 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Center of Excellence in Environmental studies (CEES) King Abdulaziz University Jeddah 21589 Saudi Arabia

*** Liu of Peking university,a well-known graphene researcher and also one of the authors for the work[1]highlighted here,has always said,‘‘Fabrication determines the future'.I *** growth of large-area high-quality ... 详细信息

关键词：石墨大规模生产铜基材料单晶化学气相沉积 Ni合金北京大学器件应用

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Computing Streamfunction and Velocity Potential in a Limited Domain of Arbitrary *** I:Theory and Integral Formulae

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Advances in Atmospheric Sciences 2011年第6期28卷 1433-1444页

作者： Qin XU 高守亭曹洁 NOAA/National Severe Storms Laboratory Norman Oklahoma USA Cooperative institute for Mesoscale Meteorological studies University of Oklahoma USA institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 （Received 15 October 2010 revised 9 March 2011）

The non-uniqueness of solution and compatibility between the coupled boundary conditions in computing velocity potential and streamfunction from horizontal velocity in a limited domain of arbitrary shape are revisited theoretically with rigorous mathematic *** integral formulas and their variants are used to formulate solutions for the coupled *** the absence of data holes,the total solution is the sum of two integral *** is the internally induced solution produced purely and uniquely by the domain internal divergence and vorticity,and its two components（velocity potential and streamfunction） can be constructed by applying Green＇s function for Poisson equation in unbounded domain to the divergence and vorticity inside the *** other is the externally induced solution produced purely but non-uniquely by the domain external divergence and vorticity,and the non-uniqueness is caused by the harmonic nature of the solution and the unknown divergence and vorticity distributions outside the *** setting either the velocity potential（or streamfunction） component to zero,the other component of the externally induced solution can be expressed by the imaginary（or real） part of the Cauchy integral constructed using the coupled boundary conditions and solvability conditions that exclude the internally induced *** streamfunction（or velocity potential） for the externally induced solution can also be expressed by the boundary integral of a double-layer（or singlelayer） density *** the presence of data holes,the total solution includes a data-hole-induced solution in addition to the above internally and externally induced solutions.

关键词： integral formulae streamfunction velocity potential domain of arbitrary shape

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Experimental study of phase equilibria on Co-Fe-rich side of Co-Al-Fe system

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Journal of Iron and Steel Research(International) 2020年第6期27卷 673-680页

作者： Jing-jing Wang Wei-sen Zheng Xiao-gang Lu Yan-lin He Qing-rong Yao Jiang Wang School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Materials Genome institute Shanghai UniversityShanghai200444China State Key Laboratory of advanced Special Steel Shanghai UniversityShanghai200444China School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin 541004GuangxiChina

Despite various studies on Co-Al-Fe ternary system, its phase equilibria are still in doubt. Phase equilibria, magnetic transition and bcc_A2/bcc_B2 order-disorder transformation at the Co-Fe-rich side of the Co-Al-Fe alloys were carefully investigated by means of electron probe microanalysis (EPMA), X-ray diffraction (XRD) and differential scanning calo-rimetry. The equilibrium phases and their compositions were determined by 18 alloy samples annealed at 900, 1000, 1100 and 1200℃ for 528, 336, 168 and 96h, respectively, followed by quenching. However, by adopting the above traditional method, bcc_A2 and fcc_A1 phases are difficult to be distinguished through XRD analysis at room temperature due to the martensitic transformation of fcc_A1 phase during quenching. For this reason, high-temperature insitu XRD technique was utilized to correctly establish the phase relationships among bcc_A2, bcc_B2 and fcc_A1 phases. The phase transformation between bcc_A2 and B2 phases was determined to be second order instead of first order at temperatures higher than 900℃. The equilibrium phases and compositions were further confirmed by fabricating 16 diffusion couples together with EPMA. Meanwhile, using three-dimensional differential scanning calorimetry method, bcc_A2/B2 and ferro-/paramagnetic transi-tions were determined with high accuracy.

关键词： Co-Al-Fe system Phase equilibrium Martensitic transformation Order-disorder transition

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Electronic structures and optical properties of monoclinic ZrO2 studied by first-principles local density approximation + U approach

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Journal of advanced Ceramics 2017年第1期6卷 43-49页

作者： Jinping LI Songhe MENG Jiahong NIU Hantao LU Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China Center for Interdisciplinary studies & Key Laboratory for Magnetism and Magnetic Materials of the MoE Lanzhou University Lanzhou 730000 China Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan

电子结构和单斜晶的 ZrO 2 的光性质(m-ZrO 2) 借助于第一原则的本地密度近似(LDA ) 被调查 + U 途径。没有所在地的库仑相互作用， m-ZrO 2 的乐队差距是 3.60 eV，比试验性的价值(5.8 eV ) 低得多。由在 Zr 原子上介绍 4d orbitals ... 详细信息

电子结构和单斜晶的 ZrO 2 的光性质(m-ZrO 2) 借助于第一原则的本地密度近似(LDA ) 被调查 + U 途径。没有所在地的库仑相互作用， m-ZrO 2 的乐队差距是 3.60 eV，比试验性的价值(5.8 eV ) 低得多。由在 Zr 原子上介绍 4d orbitals 的库仑相互作用(U d ) 并且 O 原子上的 2p orbitals (U 我们能复制的 p ), 乐队差距的试验性的价值。， m-ZrO 2 的计算绝缘的功能在四角形的 ZrO 2 和它是的立方的 ZrO 2 在它的想象的部分在乐队差距的边展出一个小肩膀不在，它与试验性的观察一致。肩膀的起源在原子价和传导乐队的边附近被归因于电子结构的差别。

关键词：单斜晶的 ZrO 2(m-ZrO 2) 第一原则本地密度近似(LDA )+ U 电子结构光性质

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Optical and SAR image registration based on improved nonsubsampled wavelet transform for sea islands

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Acta Oceanologica Sinica 2014年第5期33卷 86-95页

作者： SHI Wei SU Fenzhen WANG Ruirui LU Yongduo institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Collaborative Innovation Center of South China Sea studies Nanjing University Beijing Forestry university National Marine Environmental Forecasting Center State Oceanic Administration

Homologous feature point extraction is a key problem in the optical and synthetic aperture radar （SAR） image registration for islands. A new feature point extraction method using a threshold shrink operator and non-subsampled wavelet transform （TSO-NSWT） for optical and SAR image registration was proposed. Moreover, the matching for this proposed feature was different from the traditional feature matching strategies and was performed using a similarity measure computed from neighborhood circles in low-frequency bands. Then, a number of reliably matched couples with even distributions were obtained, which assured the accuracy of the registration. Application of the proposed algorithm to SPOT-5 （multi-spectral） and YG-1 （SAR） images showed that a large number of accurately matched couples could be identified. Additionally, both of the root mean square error （RMSE） patterns of the registration parameters computed based on the TSO-NSWT algorithm and traditional NSWT algorithm were analyzed and compared, which further demonstrated the effectiveness of the proposed algorithm. The algorithm can supply the crucial step for island image registration and island recognition.

关键词： image registration islands South China Sea wavelet transform threshold shrink operator

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Impact of the biological definition of Alzheimer’s disease using amyloid, tau and neurodegeneration (ATN):what about the role of vascular changes,inflammation,Lewy body pathology?

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Translational Neurodegeneration 2018年第1期7卷 111-117页

作者： S.Gauthier H.Zhang K.P.Ng T.A.Pascoal P.Rosa-Neto McGill Center for studies in Aging Douglas Mental Health Research InstituteMontrealCanada Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqingChina Department of Neurology National Neuroscience InstituteSingaporeSingapore

Background:The NIA-AA research framework proposes a biological definition of Alzheimer’s disease,where asymptomatic persons with amyloid deposition would be considered as having this disease prior to ***:Notwithstanding the fact that amyloid deposition in isolation is not associated with dementia,even the combined association of amyloid and tau pathology does not inevitably need to dementia over age *** pathological factors may play a leading or an accelerating role in age-associated cognitive decline,including vascular small vessel disease,neuroinflammation and Lewy Body ***:Research should aim at understanding the interaction between all these factors,rather than focusing on them *** this will lead to a personalized approach to the prevention of brain aging,based on individual biological,genetic and cognitive profiles.

关键词： Alzheimer’s disease Diagnosis Treatment Biomarkers Precision medicine Translational research Brain imaging Database analysis Human volunteer cohorts

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Fundamental studies on enhancement and blinking mechanism of surface-enhanced Raman scattering （SERS） and basic applications of SERS biological sensing

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Frontiers of physics 2014年第1期9卷 31-46页

作者： Yuko S. Yamamoto Mitsuru Ishikawa Yukihiro Ozaki Tamitake Itoh Nano-Bioanalysis Research Group Health Research Institute National Institute of Advanced Industrial Science and Technology (AIST) Takamatsu Kagawa 761-0395 Japan Department of Chemistry Josai University Itado Saitama 350-0295 Japan Department of Chemistry School of Science and Technology Kwansei Gakuin University Sanda Hyogo 669-1337 Japan

We review recent our results in the fundamental study of surface-enhanced Raman scattering （SERS） with emphasis on experiments that attempted to identify the enhancement and blinking mechanism using single Ag nanoparticle dimers attached to dye molecules. These results are quantitatively discussed in the framework of electromagnetic mechanism. We also review recent our results in basic SERS applications for biological sensing regarding detections of cell surface molecules and distinction of disease marker molecules under single cell and single molecule level.

关键词： plasmonics surface-enhanced Raman scattering (SERS) surface-enhanced fluorescence,Ag nanoparticle

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Positive association between triglyceride glucose index and central systolic blood pressure among hypertensive adults

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Journal of Geriatric Cardiology 2022年第10期19卷 753-760,I0002页

作者： Li WANG Tian-Yu CAO Jin-Qiao LI Cong-Cong DING Jun-Pei LI Hua-Bo YING Li-Shun LIU Xiao HUANG Department of Nephrology the Fourth Hospital of Harbin Medical UniversityHarbinChina Biological Anthropo-logy University of California Santa BarbaraCaliforniaUSA Department of Urology Surgery Graduate School of the Fourth Hospital of Harbin Medical UniversityHarbinChina Department of Cardiology the Second Affiliated Hospi-tal of Nanchang UniversityNanchangChina institute of Biomedicine Anhui Medical UniversityHefeiChina Instit-ute of Biomedical and Health Engineering Graduate School at ShenzhenTsinghua UniversityShenzhenChina Shen-zhen Evergreen Medical institute ShenzhenChina

BACKGROUND While studies have suggested the association between triglyceride-glucose(TyG)index,a reliable surrogate for insulin resistance and hypertension data are limited to the correlation of TyG and central blood *** study aims to test the hypothesis that a higher TyG index is associated with elevated central systolic blood pressure(cSBP).METHODS A total of 9249 Chinese hypertensive adults from the H-type Hypertension and Stroke Prevention and Control Project were analyzed in this *** was measured noninvasively using an A-Pulse CASPro *** index was calculated as ln[fasting triglycerides(mg/dL)×fasting glucose(mg/dL)/2].Smoothing curve and multivariate linear regression models[beta coefficient(β)with 95%CI]were applied to analyze the association between TyG index and *** analyses were conducted to explore potential modifications to such a *** The overall mean TyG index is 8.8±0.7,and the total mean cSBP is 131.3±12.8 *** index was observed to be independently and positively associated with cSBP among the total population(β=0.92,95%CI:0.53–1.31,P<0.001),and participants who do not use antihypertensive drugs(β=1.03,95%CI:0.46–1.60,P<0.001),which is in accordance with the result of the smoothing *** association between TyG index and cSBP appears robust in all tested *** TyG index is positively and independently associated with cSBP among hypertensive *** study result suggests that TyG index might serve as an effective marker for vascular function.

关键词： hypertensive elevated systolic

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Field and Current Distribution in Superconducting Film Under Partial Field Penetration

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Chinese Physics Letters 1997年第9期14卷 701-704页

作者：徐小农孙爱民丁世英金新姚希贤阎少林闻海虎 Department of Physics and Center of advanced studies in Science and Technology of Microstructures Nanjing UniversityNanjing 210093 Department of Electronics Nankai UniversityTianjin 300071 National Labarmtory for Superconductivity Institute of PhysicsChinese Academy of SciencesBeijing 100080

Using finite-element analysis in a self-consistent way with the self-field of the current considered for superconducting thin film,the field and current distributions under partial field penetration are calculated based on the field dependent critical current density *** field penetrated depth is non-linear with the applied *** to the limited resolution of the vibrating sample magnetometer(VSM),the full penetrated field measured by VSM may be much smaller than its actual value.

关键词： field magnetometer vibrating

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