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Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe

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Ecological Processes 2019年第1期8卷 225-239页

作者： Jingyan Chen Changliang Shao Shicheng Jiang Luping Qu Fangyuan Zhao gang Dong Institute of Loess Plateau Shanxi UniversityTaiyuan 030006China National Hulunber Grassland Ecosystem Observation and Research Station&Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Vegetation Ecology Ministry of EducationNortheast Normal UniversityChangchun 130024China Forestry Post-Doctoral Station Forest Ecology Stable Isotope CenterForestry CollegeFujian Agriculture and Forestry UniversityFuzhou350002China Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China university of Chinese Academy of Sciences Beijing 100049China School of Life Science Shanxi UniversityTaiyuan 030006China.

Introduction:Water such as precipitation is the most critical environment driver of ecosystem processes and functions in semi-arid *** and intensity of drought and transient waterlogging are expected to increase in the meadow steppe in northeastern *** a 4-year dataset of eddy covariance flux measurements,ground measurements of biomass,phenology,and meteorological conditions,we investigated the changes in energy fluxes at multiple temporal scales and under different precipitation ***:The meadow steppe was latent heat(LE)dominated when soil water content was>0.3 m3 m−3,but switched to sensible heat(H)dominated status when soil water content fell below 0.3 m3 m−*** dominated the energy exchange of the meadow grasslands on a yearly *** precipitation had a profound impact on water-energy balance that could reduce the damages of drought by elevating deep soil *** influence of LE on waterlogging depended on timing,with increased LE at the beginning of growing season and decreased LE after *** and summer droughts resulted in different energy partitioning between latent and sensible heat energies,with spring drought dramatically decreased the LE fraction due to the change in *** contrast,summer drought had little impact on LE due to the sufficient water input from large precipitation events at the beginning of the growing ***:There existed great seasonal and interannual variabilities in energy balance and partitioning in the meadow steppe over the 4-year study period,which were strongly influenced by changes in *** water loss through latent heat was more sensitive to spring drought than to summer drought,while summer drought had negligible impact on *** contributed to LE by enhancing its values during and after the waterlogged periods at the beginning of the growing season in a dry year,but lowering its value after the waterlogged periods in growing season.

关键词： Energy balance Energy partition Precipitation change Eddy covariance Drought

Vascular endothelial growth factor A promotes platelet adhesion to collagen Ⅳ and causes early brain injury after subarachnoid hemorrhage

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Neural Regeneration Research 2019年第10期14卷 1726-1733页

作者： Zun-Wei Liu Jun-Jie Zhao Hong-gang Pang Jin-Ning Song department of Renal Transplantation Nephropathy Hospitalthe First Affiliated HospitalMedical College of Xi’an Jiaotong UniversityXi’anShaanxi ProvinceChina Institute of Organ Transplantation Xi’an Jiaotong UniversityXi’anShaanxi ProvinceChina department of Neurosurgery the First Affiliated HospitalMedical College of Xi’an Jiaotong UniversityXi’anShaanxi ProvinceChina The First Affiliated hospital Medical College of Xi’an Jiaotong UniversityXi’anShaanxi ProvinceChina

The role of vascular endothelial growth factor A in platelet adhesion in cerebral microvessels in the early stage of subarachnoid hemorrhage remains *** this study,the endovascular puncture method was used to produce a rat model of subarachnoid ***,30 minutes later,vascular endothelial growth factor A antagonist anti-vascular endothelial growth factor receptor 2 antibody,10μg,was injected into the right *** and western blot assay were used to assess expression of vascular endothelial growth factor A,occludin and *** double labeling was conducted to examine co-expression of GP Ⅰa-Ⅱ integrin and type Ⅳ *** was used to detect apoptosis in the *** score was used to assess behavioral *** subarachnoid hemorrhage,the expression of vascular endothelial growth factor A increased in the hippocampus,while occludin and claudin-5 expression levels ***-expression of GP Ⅰa-Ⅱ integrin and type Ⅳ collagen and the number of apoptotic cells increased,whereas behavioral performance was markedly *** treatment with anti-vascular endothelial growth factor receptor 2 antibody,occludin and claudin-5 expression recovered,while co-expression of GP Ⅰa-Ⅱ integrin and type Ⅳ collagen and the number of apoptotic cells ***,behavioral performance improved *** findings suggest that increased vascular endothelial growth factor A levels promote platelet adhesion and contribute to early brain injury after subarachnoid *** study was approved by the Biomedical Ethics Committee,Medical College of Xi’an Jiaotong university,china in December 2015.

关键词： nerve regeneration vascular endothelial growth factor A vascular endothelial growth factor receptor 2 subarachnoid hemorrhage brain injuries platelet adhesion collagen blood-brain barrier neural regeneration

遥感助力海岸带可持续发展—首届全国海岸带遥感大会总结

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遥感学报 2024年第4期28卷 1123-1128页

作者：孙伟伟苏奋振侯西勇邬国锋沈芳陈戈吴志峰张鸿生陈超张英慧杨刚黄翀宁波大学地理与空间信息技术系宁波315211 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 中国科学院烟台海岸带研究所烟台264003 深圳大学自然资源部大湾区地理环境监测重点实验室深圳518060 华东师范大学河口海岸学国家重点实验室上海200062 中国海洋大学海洋技术学院深海圈层与地球系统前沿中心青岛266100 广州大学地理科学与遥感学院广州510006 香港大学地理系中国香港999077 苏州科技大学地理科学与测绘工程学院苏州215009

2023年10月25—27日,首届全国海岸带遥感大会在宁波顺利召开。会议以“遥感与海岸带可持续发展”为主题,开设了1个主会场和14个分会场,组织了13个大会特邀报告和177个分会场口头报告。会议期间,包含院士在内的400多位专家学者围绕全球... 详细信息

2023年10月25—27日,首届全国海岸带遥感大会在宁波顺利召开。会议以“遥感与海岸带可持续发展”为主题,开设了1个主会场和14个分会场,组织了13个大会特邀报告和177个分会场口头报告。会议期间,包含院士在内的400多位专家学者围绕全球变化与海岸带生态环境、陆海统筹与海岸带城乡发展、海岸带遥感大数据与决策服务、海岸带灾害与恢复遥感、海岸带数字孪生与人工智能、海岸带立体观测与精细遥感等展开研讨,梳理海岸带遥感领域的发展现状、问题及未来方向。本次会议为海岸带遥感相关领域的国内外专家学者提供了广泛沟通、深入探讨的平台,将促进中国海岸带遥感的进一步发展以及海岸带可持续发展目标的实现。

关键词：遥感海岸带可持续发展生态环境人工智能专家观点

Safety profile of two-dimensional Pd nanosheets for photothermal therapy and photoacoustic imaging

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Nano Research 2017年第4期10卷 1234-1248页

作者： Mei Chen Shuzhen Chen Chengyong He Shiguang Mo Xiaoyong Wang gang Liu Nanfeng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Engineering Research Center for Nano-Preparation Technology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Center for Molecular Imaging and Translational Medicine School of Public Health Xiamen University Xiamen 361005 China department of Microbiology and Immunology Xiamen Medical College Xiamen 361008 China

Two-dimensional （2D） nanosheets have emerged as an important class of nanomaterial with great potential in the field of biomedicines, particularly in cancer theranostics. However, owing to the lack of effective methods that synthesize uniform 2D nanomaterials with controlled size, systematic evaluation of size-dependent bio-behaviors of 2D nanomaterials is rarely reported. To the best of our knowledge, we are the first to report a systematic evaluation of the influence of size of 2D nanomaterials on their bio-behaviors. 2D Pd nanosheets with diameters ranging from 5 to 80 nm were synthesized and tested in cell and animal models to assess their size-dependent bioapplication, biodistribution, elimination, toxicity, and genomic gene expression profiles. Our results showed size significantly influences the biological behaviors of Pd nanosheets, including their photothermal and photoacoustic effects, pharmacokinetics, and toxicity. Compared to larger-sized Pd nanosheets, smaller-sized Pd nanosheets exhibited more advanced photoacoustic imaging and photothermal effects upon ultralow laser irradiation. Moreover, in vivo results indicated that 5-nm Pd nanosheets escape from the reticuloendothelial system with a longer blood half-life and can be cleared by renal excretion, while Pd nanosheets with larger sizes mainly accumulate in the liver and spleen. The 30-nm Pd nanosheets exhibited the highest tumor accumulation. Although Pd nanosheets did not cause any appreciable toxicity at the cellular level, we observed slight lipid accumulation in the liver and inflammation in the spleen. Genomic gene expression analysis showed that 80-nm Pd nanosheets interacted with more cellular components and affected more biological processes in the liver, as compared to 5-nm Pd nanosheets. We believe this work will provide valuable information and insights into the clinical application of 2D Pd nanosheets as nanomedicines.

关键词： Pd nanosheets photothermal therapy photoacoustic imaging toxicity evaluation genomic gene expression

Fluctuation control for many-to-one routing in wireless sensor networks

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The Journal of china Universities of Posts and Telecommunications 2012年第6期19卷 35-44页

作者： JING gang JIA Lei XIE Li-hua HU Qing-lei LIU Shuai School of Control Science and Engineering Shandong University Exquisitus Centre for E-CitySchool of Electrical and Electronic EngineeringNanyang Technological University department of Control Science and Engineering Harbin Institute of Technology

This paper presents a distributed and adaptive fluctuation control scheme for many-to-one routing （FCM） in wireless sensor networks. Unlike well-known topology control schemes, the primary design objective is to reduce the fluctuation which happens due to overload of sensors in a data collection tree. More specifically, an estimation model of a sensor available capacity based on the number of its neighbors is proposed. In addition, this paper proposes a parent selection mechanism by three-way handshake. With such model and the selection mechanism, it is ensured that the load of a sensor does not exceed its available capacity. Finally, an adaptive maintenance mechanism is proposed to adjust the estimation of a sensor available capacity as the network environment changes. Simulation results demonstrate the effectiveness of the scheme.

关键词： wireless sensor network fluctuation control schemes many-to-one routing congestion control tree topologies

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大球囊扩张成形治疗贲门失弛缓症

医学影像学杂志 2004年第3期14卷 226-228页

作者：韩新巍吴刚邢古生马波李天晓刘保山石谨郑州大学第一附属医院放射科河南郑州450052

目的 :探讨直径 3.5～ 4 .5cm大球囊扩张成形治疗贲门失弛缓症的疗效及价值。方法 :透视监视下应用大球囊对 34例贲门失弛缓症患者进行扩张治疗。结果 :34例中 1次扩张治愈 32例 ,2例扩张 2次治愈。术后随访 2 4～ 35月 ,吞咽困难缓解率... 详细信息

目的 :探讨直径 3.5～ 4 .5cm大球囊扩张成形治疗贲门失弛缓症的疗效及价值。方法 :透视监视下应用大球囊对 34例贲门失弛缓症患者进行扩张治疗。结果 :34例中 1次扩张治愈 32例 ,2例扩张 2次治愈。术后随访 2 4～ 35月 ,吞咽困难缓解率 10 0 % ,1例有轻度食管返流症状 ,无 1例复发。结论 :利用大球囊扩张成形治疗贲门失弛缓症安全、有效 ,值得推广。

关键词：治疗学介入性贲门失驰症

A technique for cardiac resynchronization therapy using left bundle branch area and left ventricular pacing

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Chinese Medical Journal 2021年第22期134卷 2744-2746页

作者： Xiang-Fei Feng Rui Zhang Mei Yang Bo Liu Ya-Qin han Qiu-Fen Lu Yi-gang Li department of Cardiology Xinhua HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200092China.

Cardiac resynchronization therapy(CRT)via biventricu-lar pacing(BVP)is known to improve clinical outcomes and decreases all-cause mortality,particularly in patients with left bundle branch block(LBBB)and reduced left ventricular(LV)function.[1]Recently,several groups have shown the feasibility of left bundle branch area pacing(LBBAP)as an alternative choice to His bundle pacing in patients with LBBB by pacing the left bundle branch(LBB)region beyond the block site with a stable threshold and a short QRS duration(QRSd).[2,3]However,it is unknown whether the clinical efficacy of LBBAP with an appropriate atrioventricular(AV)delay would be the same as or better than that of LV epicardial pacing or CRT.

关键词： pacing ventricular bundle

Effects of frustration on explosive synchronization

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Frontiers of physics 2016年第6期11卷 67-74页

作者： Xia Huang Jian Gao Yu-Ting Sun Zhi-gang Zheng Can Xu department of Mathematics and Physics North China Electric Power University Beijing 102206 China department of Physics and the Beijing-Hong Kong-Singapore Joint Centre for Nonlinear and Complex Systems (Beijing) Beijing Normal University Beijing 100875 China College of Information Science and Engineering Huaqiao University Xiamen 361021 China

In this study, we consider the emergence of explosive synchronization in scale-free networks by considering the Kuramoto model of coupled phase oscillators. The natural frequencies of oscillators are assumed to be correlated with their degrees and frustration is included in the system. This assumption can enhance or delay the explosive transition to synchronization. Interestingly, a de-synchronization phenomenon occurs and the type of phase transition is also changed. Furthermore, we provide an analytical treatment based on a star graph, which resembles that obtained in scale-free networks. Finally, a self-consistent approach is implemented to study the de-synchronization regime. Our findings have important implications for controlling synchronization in complex networks because frustration is a controllable parameter in experiments and a discontinuous abrupt phase transition is always dangerous in engineering in the real world.

关键词： coupled phase oscillator explosive synchronization frustration

Reduction of Aromatic α-Keto Esters by Commercially Available Zinc Dust and Ammonium Formate: Formation of Aromatic α-Hydroxy Esters

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Chemical Research in Chinese Universities 2011年第5期27卷 784-786页

作者： CHEN gang YAO Guo-xin SONG Guang-wei ZHU Jin-tao department of Chemistry Zhejiang Sci-Tech University Hangzhou 310018 P. R. China

Various aromatic α-keto esters were rapidly and selectively reduced to aromatic α-hydroxy esters by commercially available zinc dust and ammonium formate in the presence of other functional groups such as halogens, ... 详细信息

关键词： Aromatic aoketo ester Zinc dust Ammonium formate Aromatic a-hydroxy ester