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Quantitative estimation of the shrub canopy LAI from atmosphere-corrected HJ-1.CCD data in Mu Us Sandland

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Science China Earth sciences 2010年第S1期53卷 26-33页

作者： CHEN wei1,2.CAO ChunXiang1,HE QiSheng1,2.GUO HuaDong3,ZHANG Hao1,2.li RenQiang4,ZHENG Sheng1,2.XU Min1,2.gao MengXu1,2.ZHAO {2.,2.li Sha1,NI Xiliang1,2.JIA HuiCong1,JI wei1,TIAN Rong1,2.liU Cheng1,2.ZHAO YuXing5 & li JingLu6 1 State Key laboratory of Remote Sensing Science,Jointly Sponsored by the {2. of Remote Sensing Applications of chinese academy of sciences and beijing Normal University,beijing 100101,China 2.Graduate University of chinese academy of sciences,beijing 100049,China 3 Center for Earth Observation and Digital Earth,chinese {12. of sciences,beijing 100190,China 4 China Key laboratory of Ecological Network Observation and Modeling,institute of geographical sciences and Natural Resources Research,chinese {12. of sciences,beijing 100101,China 5 Ordos Forestry Sand Control Science {2.,Dongsheng 017000,China 6 Inner Mongolia Biomass Thermoelectricity limited Company,Wushen 017300,China 1. State Key laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China 2. Graduate University of{1. Beijing 100049 China 3. Center for Earth Observation and Digital Earth Chinese Academy of Sciences Beijing 100190 China 4. China Key laboratory of Ecological Network Observation and Mode{1.ng Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China 5. Ordos Forestry Sand Control Science institute Dongsheng 017000 China 6. Inner Mongolia Biomass Thermoelectricity limited Company Wushen 017300 China

The leaf area index(LAI) is an important ecological parameter that characterizes the interface between vegetation canopy and the *** addition,it is used by most {1.-oriented ecosystem *** paper investigates the po... 详细信息

The leaf area index(LAI) is an important ecological parameter that characterizes the interface between vegetation canopy and the *** addition,it is used by most process-oriented ecosystem *** paper investigates the potential of HJ-1 CCD data combined with linear spectral unmixing and an inverted geometric-optical model for the retrieval of the shrub LAI in Wushen Banner of Inner Mongolia in the Mu Us ***(Moderate Resolution Atmospheric Radiance and Transmittance Model) was used for atmospheric *** was extracted using the threshold of the normalized difference vegetation index,with which water bodies and farmland were separated,in combination with a vegetation map of the People's Republic of China(1:1000000).Using the geometric-optical model,we derive the per-pixel reflectance as a simple linear combination of two components,namely sunlit background and *** fraction of sunlit background is related to the shrub *** the support of HJ-1 CCD data,we employ linear spectral unmixing to obtain the fraction of sunlit background in an atmospherically corrected HJ *** addition,we use the measured shrub canopy structural parameters for shrub communities to invert the geometric-optical model and retrieve the pixel-based shrub *** total,18 sample plots collected in Wushen Banner of Inner Mongolia are used for *** results of the shrub LAI show good agreement with R2.of 0.817 and a root-mean-squared error of 0.173.

关键词： shrub leaf area index inversion HJ-1 data geometric-optical model MODTRAN Mu Us Sandland

A N-CoSe/CoSe_(2.-C@Cu hierarchical architecture as a current collector-integrated anode for potassium-ion batteries

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Rare Metals 2024年第8期43卷 3702-3712页

作者： Zi-Jie Mu Yan-Jun gao Wen-Shuai Dong Zong-You {1. Qing-Yi Song Han-Jiao Huang {1.-Dong Xing jian-Guo Zhang {2. Wang Qi-Yao Yu State Key laboratory of Explosion Science and Technology School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Metallurgical and Ecological engineering University of Science and Technology BeijingBeijing 100083China

The highly reversible insertion/extraction of large-radius K^+into electrode materials remains a tough goal,especially for con version-type ***,we design a current collector-integrated electrode(N-CoSe/CoSe_(2.-C@Cu) as an advanced anode for potassium-ion battery(PIBs).The conductive CoSe/CoSe_(2. heterojunction with rich Se vacancy defects,conductive sp^2.N-doped carbon layer,and the elastic copper foil matrix can greatly accelerate the electron transfer and enhance the structural ***,the well-designed N-CoSe/CoSe_(2.-C@Cu current collector-integrated electrode displays enhanced potassium storage performance with regard to a high capacity(32..1 mAh·g^(-1) at 0.1 A·g^(-1) after 2.0cycles),an exceptional rate capability(2.3.5 mAh·g^(-1) at2.00 mA·g^(-1)),and an extraordinary long-term cycle stability(a capacity fading of only 0.019% per cycle over12.0 cycles at 2.00 mA·g^(-1)).Impressively,ex situ scanning electron microscopy(SEM) characterizations prove that the elastic structure of copper foil is merged into the cleverly designed N-CoSe/CoSe_(2.-C@Cu heterostructure,which buffers the deformation of structure and volume and greatly promotes the cycle life during the potassium/depotassium process.

关键词： Potassium-ion battery Integrated collector electrode CoSe CoSe_2 Heterojunction Copper foil matrix N-doped carbon

Chiral quantum heating and cooling with an optically controlled ion

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light(Science & Applications) 2024年第7期13卷 1393-1400页

作者： Jin-Tao Bu jian-Qi Zhang {1.-Yi Ding Jia-Chong li Jia-wei Zhang Bin Wang Wen-Qiang Ding Wen-Fei Yuan liang Chen Qi Zhong Ali Keçebaş Şahin KÖzdemir Fei Zhou Hui Jing Mang Feng State Key laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of Sciences430071 WuhanChina. University of the chinese academy of sciences 100049 BeijingChina. Research Center for Quantum Precision Measurement Guangzhou Institute of Industry Technology511458 GuangzhouChina. Department of engineering Science and Mechanics and Materials Research InstitutePennsylvania State UniversityUniversity ParkState CollegePA 16802USA. Key laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal University410081 ChangshaChina. Department of Physics Zhejiang Normal University321004 JinhuaChina

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-Hermitian forma{1.sm.A prominent feature of non-Hermiticity is the existence of exceptional points(EPs),... 详细信息

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-Hermitian formalism.A prominent feature of non-Hermiticity is the existence of exceptional points(EPs),which has no counterpart in closed quantum *** has been shown in classical systems that dynamical encirclement in the vicinity of an EP,whether the loop includes the EP or not,could lead to chiral mode ***,we show that this is valid also for quantum systems when dynamical encircling is performed in the vicinity of their liouvillian EPs(LEPs),which include the effects of quantum jumps and associated noise—an important quantum feature not present in previous *** demonstrate,using a Paul-trapped ultracold ion,the first chiral quantum heating and refrigeration by dynamically encircling a closed loop in the vicinity of an *** witness the cycling direction to be associated with the chirality and heat release(absorption)of the quantum heat engine(quantum refrigerator).Our experiments have revealed that not only the adiabaticity breakdown but also the Landau–Zener–Stückelberg process play an essential role during dynamic encircling,resulting in chiral thermodynamic *** observations contribute to further understanding of chiral and topological features in non-Hermitian systems and pave a way to exploring the relation between chirality and quantum thermodynamics.

关键词： quantum chiral dynamical

Association of Cytokines with Clinical Indicators in Patients with Drug-Induced liver Injury

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Biomedical and Environmental sciences 2024年第5期37卷 494-502页

作者： CAO wei Hua {1.G Ting Ting SHEN ge DENG Wen WANG Shi Yu ZHANG Zi Yu li Xin Xin LU Yao ZHANG Lu liU Ru Yu CHANG Min WU Shu ling {2. Yuan Jiao HAO Hong Xiao CHEN Xiao Xue HU Lei Ping XU Meng Jiao YI wei XIE Yao li Ming Hui Department of Hepatology Division 2 Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Department of Hepatology Division 2 Peking University Ditan Teaching HospitalBeijing 100015China Department of Gynecology and Obstetrics Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China

Objective To explore characteristics of clinical parameters and cytokines in patients with drug-induced liver injury(DIli)caused by different drugs and their correlation with clinical *** The study was conducted on patients who were up to Review of Uncertainties in Confidence Assessment for Medical Tests(RUCAM)scoring criteria and clinically diagnosed with *** on chinese herbal medicine,cardiovascular drugs,non-steroidal anti-inflammatory drugs(NSAIDs),antiinfective drugs,and other drugs,patients were divided into five *** were measured by Luminex *** characteristics of clinical biochemical indicators and cytokines in DIli patients and their correlation were *** 73 patients were *** among five groups was statistically different(P=0.032..Alanine aminotransferase(ALT)(P=0.033)and aspartate aminotransferase(AST)(P=0.007)in NSAIDs group were higher than those in chinese herbal medicine ***-6(IL-6)and tumor necrosis factor alpha(TNF-α)in patients with chinese herbal medicine(IL-6:P2.;TNF-α:P=0.001)were lower than those in NSAIDs *** was a positive correlation between ALT(r=0.697,P=0.02.),AST(r=0.72.,P=0.019),and IL-6 in NSAIDs *** Older age may be more prone to *** with NSAIDs have more severe liver damage in early stages of DIli,TNF-αand IL-6 may partake the inflammatory process of DIli.

关键词： Drug-induced liver injury Cytokines Non-steroidal anti-inflammatory drugs Inflammation

Key factors in chaperonin-assisted protein folding

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Particuology 2012年第1期10卷 105-116页

作者： Ying Ren jian {1. ji Xu {2. ge jinghai li State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the chinese academy of sciences Beijing 100039 China

Incorrect folding of proteins in the macromolecular crowding environment in living cells would cause cellular disasters. All cells have developed their structurally and functionally distinct classes of molecular chaperones to help normative proteins fold to their native structures, one of which is the most studied GroEliES complex. In the present article, large-scale all-atom explicit solvent molecular dynamics （MD） simulations have been carried out on rhodanese folding in a series of chaperonin mutants for 2.0ns to understand the mechanism therein. In accordance with experimental results, two factors have been identified to play a significant role, the geometrical confinement effect of the folding cavity and the charge effect of the inner surface of the cavity. Our analysis of the properties during simulation suggests that the GroEL/ES complex directly exerts force on the contacting residues of the substrate, thus assists substrate folding.

关键词： Molecular dynamics simulationExplicit solventChaperoninProtein folding

Explicit solvent molecular dynamics simulations of chaperonin-assisted rhodanese folding

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Particuology 2009年第3期7卷 220-224页

作者： Ying Ren jian {1. Ji XU {2. ge jinghai li State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the chinese academy of sciences Beijing 100039 China

Chaperonins are known to facilitate the productive folding of numerous misfolded proteins. Despite their established importance, the mechanism of chaperonin-assisted protein folding remains unknown. In the present article, all-atom explicit solvent molecular dynamics （MD） simulations have been performed for the first time on rhodanese folding in a series of cavity-size and cavity-charge chaperonin mutants. A compromise between stability and flexibility of chaperonin structure during the substrate folding has been observed and the key factors affecting this dynamic process are discussed.

关键词： Molecular dynamics simulation Explicit solvent Chaperonin-assisted Protein folding Molecular chaperonin Rhodanese

Contamination assessment,source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya,China

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China geology 2024年第3期7卷 469-479页

作者： jian-zhou Yang Yan-gang Fu Qiu-{1. Gong Sheng-ming Ma Jing-jing Gong jian-weng {2. Zhen-{1.ang Wang Yong-wen Cai Shi-xin Tang institute of {1.ophysical and {1.ochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Key laboratory of Coup{1.ng process and Effect of Natural Resources Elements Ministry of Natural ResourcesBeijing 100055China

To understand the levels of potentially toxic elements(PTEs)contamination in soils and their effects on human health from different agricultural land use in Sanya,China.1.0} soil samples(64 topsoil samples and corresponding subsoil samples)were collected from the five representative land-use *** coupled plasma mass spectrometry(ICP-MS),Atomic fluorescence spectrometry(AFS),and Inductively coupled plasma optical emission spectrometry(ICP-OES)were used to determine the content of PTEs(As,Cd,Hg,Cu,Cr,Ni,Pb,Zn,Co,Mo,Sb,and V).Correlation analysis and factor analysis were used to determine the source of ***-accumulation index(I_({1.o)),hazard quotient(HQ),and total carcino{1.nic risk index(TR)were used to measure the PTEs contamination and its relative health *** showed that the avera{1. values of 1.0}PTEs in topsoil were higher than the Hainan soil {1.ochemical baseline,showing different degrees of PTEs accumulation *** concentration of PTEs in the topsoil was lower than those in the subsoil except for Cd and *** I_({1.o)revealed that the major accumulated element in soils was As followed by *** apportionment sug{1.sted that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the *** risks of soil samples from five land-use patterns presented a trend of paddy field>dry field>woodland>orchard>garden ***,the HQ values of 1.0}PTEs were less than the recommended limit of HQ=1.representing that there are no non-carcino{1.nic risks of PTEs for children and adults in the study *** TR values are within 6.95×1.^(-6)-1.38×1.^(-5),which corresponds to the low *** the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.

关键词： Potentially toxic trace elements(PTEs) Soils Land-use geo-accumulation index(Igeo) Hazard quotient(HQ) Total carcinogenic risk index(TR) Source apportionment Health risk Agricutural geological survey {1.

Molecular dynamics simulation of a single polymer in hydrophilic nano-slits

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chinese Science Bulletin 2008年第17期53卷 2599-2606页

作者： REN Ying gao {1. ge {2. li jinghai HU GuoHua State Key laboratory of {1. Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100090 China Graduate University of the chinese academy of sciences Beijing 100039 China laboratory of Chemical {1.{2. CNRS-ENSIC-INPL 1 rue Grandville BP 20451 Nancy 54001 France

The behavior of a single polyethylene polymer in aqueous solution confined between two hydrophilic walls is studied with molecular dynamics (MD) simulations. The thickness of the nano-slit ranges from 1.2. to 3.1. nm, which is comparative to the polymer dimension. A monotonic transition from 3D- to 2.-like configurations is observed as the distance between the two walls narrows. Monomers are compressed into several layers and the preferred bond orientations alternate between parallel and normal to the walls accordingly. The diffusivity in the direction parallel to the wall is always larger than the one perpendicular to it. Calculation of the entropy and enthalpy changes during the folding of the polymer chain alone cannot explain the spontaneous process. The corresponding increase in water entropy due to volume expansion may be large enough to result in the overall free energy decrease.

关键词：聚乙烯聚合体分子动力学模拟亲水性纳米裂缝

3D Nerve: A Three-Dimensional Reconstruction System for Peripheral Nerves

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3D Nerve: A Three-Dimensional Reconstruction System for Peri...