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143篇 您的检索式:作者名="Guiying Li"
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1A survey of remote sensing-based aboveground biomass estimation methods in forest ecosystems显示文摘Remote sensing-based methods of aboveground biomass(AGB)estimation in forest ecosystems have gained increased attention,and substantial research has been conducted in the past three decades.This paper provides a survey of current biomass estimation methods using remote sensing data and discusses four critical issues–collection of field-based biomass reference data,extraction and selection of suitable variables from remote sensing data,identification of proper algorithms to develop biomass estimation models,and uncertainty analysis to refine the estimation procedure.Additionally,we discuss the impacts of scales on biomass estimation performance and describe a general biomass estimation procedure.Although optical sensor and radar data have been primary sources for AGB estimation,data saturation is an important factor resulting in estimation uncertainty.LIght Detection and Ranging(lidar)can remove data saturation,but limited availability of lidar data prevents its extensive application.This literature survey has indicated the limitations of using single-sensor data for biomass estimation and the importance of integrating multi-sensor/scale remote sensing data to produce accurate estimates over large areas.More research is needed to extract a vertical vegetation structure(e.g.canopy height)from interferometry synthetic aperture radar(InSAR)or optical stereo images to incorporate it into horizontal structures(e.g.canopy cover)in biomass estimation modeling.Dengsheng Lu Qi Chen Guangxing Wang Lijuan Liu Guiying Li Emilio Moran 2016International Journal of Digital Earth2016,9,1:17
2In vivo theranostics with near-infraredemitting carbon dots—highly efficient photothermal therapy based on passive targeting after intravenous administration显示文摘Carbon dots that exhibit near-infrared fluorescence(NIR CDs)are considered emerging nanomaterials for advanced biomedical applications with low toxicity and superior photostability and targeting compared to currently used photoluminescence agents.Despite progress in the synthesis of NIR CDs,there remains a key obstacle to using them as an in vivo theranostic agent.This work demonstrates that the newly developed sulfur and nitrogen codoped NIR CDs are highly efficient in photothermal therapy(PTT)in mouse models(conversion efficiency of 59%)and can be readily visualized by photoluminescence and photoacoustic imaging.The real theranostic potential of NIR CDs is enhanced by their unique biodistribution and targeting.Contrary to all other nanomaterials that have been tested in biomedicine,they are excreted through the body’s renal filtration system.Moreover,after intravenous injection,NIR CDs are accumulated in tumor tissue via passive targeting,without any active species such as antibodies.Due to their accumulation in tumor tissue without the need for intratumor injection,high photothermal conversion,excellent optical and photoacoustic imaging performance,and renal excretion,the developed CDs are suitable for transfer to clinical biomedical practice.Xin Bao Ye Yuan Jingqin Chen Bohan Zhang Di Li Ding Zhou Pengtao Jing Guiying Xu Yingli Wang Kateřina Holá Dezhen Shen Changfeng Wu Liang Song Chengbo Liu Radek Zbořil Songnan Qu 2018Light(Science & Applications)2018,7,1:13
3Transplantation of bone marrow mesenchymal stem cells improves cognitive deficits and alleviates neuropathology in animal models of Alzheimer’s disease: a meta-analytic review on potential mechanisms显示文摘Background Alzheimer’s disease is a neurodegenerative disorder.Therapeutically,a transplantation of bone marrow mesenchymal stem cells(BMMSCs)can play a beneficial role in animal models of Alzheimer’s disease.However,the relevant mechanism remains to be fully elucidated.Main body Subsequent to the transplantation of BMMSCs,memory loss and cognitive impairment were significantly improved in animal models with Alzheimer’s disease(AD).Potential mechanisms involved neurogenesis,apoptosis,angiogenesis,inflammation,immunomodulation,etc.The above mechanisms might play different roles at certain stages.It was revealed that the transplantation of BMMSCs could alter some gene levels.Moreover,the differential expression of representative genes was responsible for neuropathological phenotypes in Alzheimer’s disease,which could be used to construct gene-specific patterns.Conclusions Multiple signal pathways involve therapeutic mechanisms by which the transplantation of BMMSCs improves cognitive and behavioral deficits in AD models.Gene expression profile can be utilized to establish statistical regression model for the evaluation of therapeutic effect.The transplantation of autologous BMMSCs maybe a prospective therapy for patients with Alzheimer’s disease.Chuan Qin Yalan Lu Kewei Wang Lin Bai Guiying Shi Yiying Huang Yongning Li 2020Translational Neurodegeneration2020,9,2:9
4Photocatalytic defluorination of perfluorooctanoic acid by surface defective BiOCl:Fast microwave solvothermal synthesis and photocatalytic mechanisms显示文摘There is an urgent need for developing cost-effective methods for the treatment of perfluorooctanoic acid(PFOA)due to its global emergence and potential risks.In this study,taking surface-defective BiOCl as an example,a strategy of surface oxygen vacancy modulation was used to promote the photocatalytic defluorination efficiency of PFOA under simulated sunlight irradiation.The defective BiOCl was fabricated by a fast microwave solvothermal method,which was found to induce more surface oxygen vacancies than conventional solvothermal and precipitation methods.As a result,the asprepared BiOCl showed significantly enhanced defluorination efficiency,which was 2.7 and33.8 times higher than that of BiOCl fabricated by conventional solvothermal and precipitation methods,respectively.Mechanistic studies indicated that the defluorination of PFOA follows a direct hole(h^+)oxidation pathway with the aid of·OH,while the oxygen vacancies not only promote charge separation but also facilitate the intimate contact between the photocatalyst surface and PFOA by coordinating with its terminal carboxylate group in a bidentate or bridging mode.This work will provide a general strategy of oxygen vacancy modulation by microwave-assisted methods for efficient photocatalytic defluorination of PFOA in the environment using sunlight as the energy source.Yuanyuan Sun Guiying Li Wanjun Wang Wenquan Gu Po Keung Wong Taicheng An 2019Journal of Environmental Sciences2019,31,10:7
5Longitudinal study of a community hospital integrated model for diabetes management in the Beijing Jingsong community显示文摘Objective:To determine the effects of a community hospital integrated model on the longitu-dinal management of diabetic patients.Methods:Four hundred forty-one patients with type 2 diabetes residing in Jingsong Commu-nity were randomly assigned to intensive and standard groups.Metabolic parameters were meas-ured in the two groups at baseline and after 36 months of management to compare the rate of goal achievement.Results:After comprehensive management,the overall control rate in the intensive group was increased from 2.7%to 9.6%compared with 2.3%-4.5%in the standard group.Specifically,the control rates for fasting plasma glucose,glycosylated hemoglobin,and blood pressure in the intensive group were significantly increased from 54.1%,40.0%,and 68.2%to 85.5%,74.6%,and 89.1%,respectively.The control rate for glycosylated hemoglobin in the intensive group was significantly higher than the standard group after 36 months of treatment.Conclusion:The community hospital integrated model for longitudinal management effec-tively improved the control rate of glycosylated hemoglobin and the overall control rate in patients with type 2 diabetes.Jiandong Zhang Ning Zhuang Mingxia Yuan Lijuan Gao Chuan Bian Huaining Chen Qing Chi Suqing Hui Guiying Li Yanli Su Hongsong Bao Gang Wan Guangran Yang Shenyuan Yuan 2014Family Medicine and Community Health2014,2,1:7
6Methods to extract impervious surface areas from satellite images显示文摘Impervious surface area(ISA)is an important parameter for many environmental or socioeconomic relevant studies.The unique characteristics of remote sensing data made it the primary data source for ISA mapping at various scales.This paper summarizes general ISA mapping procedure and major techniques and discusses impacts of scale issues on selection of remote sensing data and corresponding algorithms.Previous studies have indicated that ISA mapping remains a challenge,especially in urban–rural frontiers and in covering a large area.Effectively employing rich spatial information in high spatial resolution imagery through texture and objectbased methods is valuable.Data fusion of multi-resolution images and spectral mixture analysis are common approaches to reduce the mixed pixel problem in medium spatial resolution images such as Landsat.Coarse spatial resolution images such as MODIS and DMSP-OLS are valuable for national and global ISA mapping but more research is needed to effectively integrate multisource/scale data for improving mapping performance.Development of an optimal procedure corresponding to specific study areas and purposes is required to generate accurate ISA mapping results.Dengsheng Lu Guiying Li Wenhui Kuang Emilio Moran 2014International Journal of Digital Earth2014,7,2:5
7Microstructural evolution and tensile properties of low-carbon steel with martensitic microstructure during warm deforming and annealing显示文摘For preparing large-scale nano-grained and ultrafine-grained steel sheets by warm rolling and annealing,the effects of de- forming temperature on both the flow stress and the microstructure evolution of 09MnNiD steel with lath martensitic microstructure were studied by warm-compression test and transmission electron microscopy(TEM)observation.Thereafter,the steel with the lath martensitic structure was multi-pass warm-rolled and then annealed.TEM results indicate that nano-grained and ultrafine-grained steel sheets are formed by warm rolling at 400℃and annealing at 400-600℃.In comparison with the as-warm-rolled specimen,the tensile strength at room temperature changes a little when the rolled samples are annealed below 450℃,and the tensile strength is greatly lowered as the annealing temperature increases to above 550℃.Yuwei Gao Tianfu Jing Guiying Qiao Jinku Yu Tiansheng Wang Qun Li Xinyu Song Shuqiang Wang Hong Gao 2008Journal of University of Science and Technology Beijing2008,15,3:4
8Electrochemical properties of carbon-coated LiFePO_4 and LiFe_(0.98)Mn_(0.02)PO_4 cathode materials synthesized by solid-state reaction显示文摘Olivine structured LiFePO 4 /C (lithium iron phosphate) and Mn 2+ -doped LiFe 0.98 Mn 0.02 PO 4 /C powders were synthesized by the solid-state reaction. The effects of manganese partial substitution and different carbon content coating on the surface of LiFePO 4 were considered. The structures and electrochemical properties of the samples were measured by X-ray diffraction (XRD), cyclic voltammetry (CV), charge/discharge tests at different current densities, and electrochemical impedance spectroscopy (EIS). The electrochemical properties of LiFePO 4 cathodes with x wt.% carbon coating (x= 3, 7, 11, 15) at =0.2C, 2C (1C= 170 mAh·g 1 ) between 2.5 and 4.3 V were investigated. The measured results mean that the LiFePO 4 with 7 wt.% carbon coating shows the best rate performance. The discharge capacity of LiFe 0.98 Mn 0.02 PO 4 /C composite is found to be 165 mAh·g 1 at a discharge rate, = 0.2C, and 105 mAh·g 1 at =2C, respectively. After 10 cycles, the discharge capacity has rarely fallen, while that of the pristine LiFePO 4 /C cathode is 150 mAh·g 1 and 98 mAh·g 1 at =0.2 and 2C, respectively. Compared to the discharge capacities of both electrodes above, the evident improvement of the electrochemical performance is observed, which is ascribed to the enhancement of the electronic conductivity and diffusion kinetics by carbon coating and Mn 2+-substitution.Lin, Ying Zeng, Baozhi Lin, Yingbin Li, Xiaowei Zhao, Guiying Zhou, Ting Lai, Heng Huang, Zhigao 2012Rare Metals2012,31,2:3
9Energy Anaiysis for TMD-Structure Systems Subjected to Impact Loading显示文摘This paper investigates the characteristics of reduction of the lateral vibration by use of a Tuned Mass Damper(TMD) for offshore jacket platforms under impact loading. Unlike traditional analysis, the present analysis focnses on theenergy concept of TMD/structure systems. In this study, a time domain is taken. The platform is modeled as a simplifiedsingle-degree-of-freedom (SDOF) system by extraction of the first vibration mode of the structure and the excited force isassumed to be impact loading. The energy dissipation and energy transmission of the structure-TMD system are studied.Finally, an optimized TMD design for the modeled platform is demonstrated based on a new type of cost function - maxi-mum dissipated energy by TMD. Results indicate that TMD control is effective in reducing the standard deviation of thedeck motion but less effective in reducing the maximum response under impact loading.WANG Shuqing(王树青) LI Huajun(李华军) JI Chunyan(嵇春艳) JIAO Guiying(焦桂英) 2002China Ocean Engineering2002,17,3:3
10Photocatalytic degradation kinetics and mechanism of environmental pharmaceuticals in aqueous suspension of TiO 2 : A case of sulfa drugs显示文摘Hai Yang Guiying Li Taicheng An Yanpeng Gao Jiamo Fu 2010Catalysis Today2010,,3:2
11Organosilicon modified method to improve Li^+ storage capacity of graphene oxide (GO)显示文摘Organosilicon modified reduced graphene oxide(Mr GO) has been fabricated by direct organosilicon modification of graphene oxide(GO). Interestingly,it is observed that 3D rGO-like structures occurred after directly carrying out the organosilicon modification on the surface of GO. The obtained organosilicon Mr GO displays the more remarkable improvement of electrochemical performances than GO,which was verified by electrochemical measurements in detail. For instance,the organosilicon MrGO shows the cycling performances at 901 mA hg^-1 after 200 cycles at 0.1 Ag^-1 and 446 mA hg^-1 after 300 cycles at 2.0 Ag^-1,respectively. These results unveil that organic modification method is an effective way to improve the Li^+ storage capacity of general carbon materials.WANG Kun JU DongYing XU GuiYing HAN BeiBei CHAI MaoRong WANG YingXin Li LiXiang ZHANG XueHu UCIDA Masaya ZHOU WeiMin 2020Science China(Technological Sciences)2020,63,12:2
12Thermoelectric Characterization of (Na_(1-y)M_y)_(1.6)Co_2O_4(M=K, Ca, Sr)显示文摘氧化物材料 NaCo_2O_4 并且(Na_(1-y ) M_y )_(1.6 ) Co_2O_4 (M=K, 0.05 <=y<=0.35; M=Ca, Sr, 0.10 <=y<=0.40 ) 被一个大音阶的第五音胶化方法准备。试验性的结果显示那个 theSeebeck 系数和 NaCo_2O_4 的力量因素被做 Ca 和 Sr 然而并非 byK 改进。NaCo_2O_4 的力量因素在它的最大值, 1.68 X 10 ^(-4) W 中心点 m^(-1) 中心 dotK^(-2) 并且 11% 比原来的的大当 Ca 的掺杂物部分是 0.1 时。做 Sr 让 NaCo_2O_4 有最大的力量因素, 1.68 X 10 ^(-4) W 中心点 m^(-1) 中心点 K^( 是 50% 的 -2) 比非做的氧化物大。试验性的结果显示合适的掺杂物和增加数量能改进热电的性质 NaCo_2O_4greatly。Ying LI Guiying XU Maofa JIANG 2006Journal of Materials Science & Technology2006,22,4:2
13Photoelectrocatalytic degradation of oxalic acid in aqueous phase with a novel three- dimensional electrode-hollow quartz tube photoelectrocatalytic reactor 显示文摘An Taicheng Li Guiying Zhu Xihai 2005Applied Catalysis A : General2005,279,12:1
14Kinetics and mechanism of advanced oxidation processes (AOPs) in degradation of ciprofloxacin in water显示文摘AN Taicheng YANG Hai LI Guiying 2010Applied Catalysis B-Environmental2010,94,34:1
15Displacement quantity test and measurement system with the laser light triangle method 显示文摘Li Guiying Chen Dianren Du Zhenlin 1998Proc SPIE1998,,:1
16查看详情显示文摘Taicheng An Jikai Liu Guiying Li 0,,:1
17Identification of CYP4V2 mutation in 21 families and overview of mutation spectrum in Bietti crystalline corneoretinal dystrophy显示文摘Xueshan Xiao Guiying Mai Shiqiang Li Xiangming Guo Qingjiong Zhang 2011Biochemical and Biophysical Research Communications2011,,2:1
18Thermodynamics and kinetics of Zn(Ⅱ) adsorption on crosslinked starch phosphates显示文摘GUO Lei SUN Changmei LI Guiying 2009Journal of Hazardous Materials2009,161,1:1
19Photoelectrocatalytic degradation of oxalic acid in aqueous phase with a novel three-dimensional electrode-hollowquartz tube photoelectrocatalytic reactor显示文摘An Taicheng Li Guiying Zhu Xihai 2005Applied Catalysis A:General2005,279,12:1
20Photoelectrocatalytic degradation of oxalic acid in aqueous phase with a novel three - dimensional electrode - hollow quartz tube photoelectroeatalytie reactor 显示文摘Taicheng An Guiying Li Xihai Zhu 2005Applied Catalysis A: General2005,279,12:1
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