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| 1 | Evaluation of Spectral Scale Effects in Estimation of Vegetation Leaf Area Index Using Spectral Indices Methods显示文摘Spectral index methodology has been widely used in Leaf Area Index(LAI) retrieval at different spatial scales. There are differences in the spectral response of different remote sensors and thus spectral scale effect generated during the use of spectral indices to retrieve LAI. In this study, PROSPECT, leaf optical properties model and Scattering by Arbitrarily Inclined Layers(SAIL) model, were used to simulate canopy spectral reflectance with a bandwidth of 5 nm and a Gaussian spectral response function was employed to simulate the spectral data at six bandwidths ranging from 10 to 35 nm. Additionally, for bandwidths from 5 to 35 nm, the correlation between the spectral index and LAI, and the sensitivities of the spectral index to changes in LAI and bandwidth were analyzed. Finally, the reflectance data at six bandwidths ranging from 40 to 65 nm were used to verify the spectral scale effect generated during the use of the spectral index to retrieve LAI. Results indicate that Vegetation Index of the Universal Pattern Decomposition(VIUPD) had the highest accuracy during LAI retrieval. Followed by Normalized Difference Vegetation Index(NDVI), Modified Simple Ratio Indices(MSRI) and Triangle Vegetation Index(TVI), although the coefficient of determination R^2 was higher than 0.96, the retrieved LAI values were less than the actual value and thus lacked validity. Other spectral indices were significantly affected by the spectral scale effect with poor retrieval results. In this study, VIUPD, which exhibited a relatively good correlation and sensitivity to LAI, was less affected by the spectral scale effect and had a relatively good retrieval capability. This conclusion supports a purported feature independent of the sensor of this model and also confirms the great potential of VIUPD for retrieval of physicochemical parameters of vegetation using multi-source remote sensing data. | DU Huishi JIANG Hailing ZHANG Lifu MAO Dehua WANG Zongming | 2016 | Chinese Geographical Science2016，26，6： | 5 |
| 2 | Comm显示文摘 | LI Huishi | 1994 | Algebra1994，22，15： | 1 |
| 3 | Determination of trace amount of antimony by adsorption voltammetry on carbon paste electrode显示文摘 | Guo Huishi Xiao Pengfeng Nie Libo | 2004 | Journal of Southeast University2004，，： | 1 |
| 4 | IMeading homogeneous algebras and Grobner bases显示文摘 | LI Huishi | 2009 | Advanced Lectures in Mathematics2009，8，： | 1 |
| 5 | Filtered-graded transfer of Groebner basis computation in solvable polynomial algebras显示文摘 | Li Huishi Wu Yihong | 2000 | Comm Alg2000，28，1： | 1 |
| 6 | Hepatic ischemia/reperfusion injury involves functional TLR4 signaling in nonparenchymal cells显示文摘 | Tsung A Hoffman RA huishi K | | 0，，11： | 1 |
| 7 | MCM-41 mesoporous material modified carbon paste electrode for the determination of cardiac troponin I by anodic stripping voltammetry显示文摘 | Huishi Guo Nongyue He Shuxun Ge Di Yang Jinan Zhang | 2005 | Talanta2005，，1： | 1 |
| 8 | Dehomogenization of gradings to Zariskian filtrations and applications to invertible ideals显示文摘 | Li Huishi Oystcaeyen F V | 1992 | Prcc Amer Math Soc1992，115，1： | 1 |
| 9 | Interactions between drugs and polymers influencing hot melt extrusion显示文摘 | Yongcheng L Huishi P Zhefei G | 2013 | J Pharm Pharmacol2013，66，2： | 1 |
| 10 | Expression and localization of mesothelin in developing rat pancreas显示文摘 | Liang‐QinHou Yin‐HeWang Li‐JieLiu JingGuo Li‐PingTeng Li‐HuaCao HuiShi LiYuan WeiDe | 2008 | Development Growth & Differentiation2008，，7： | 1 |
| 11 | Zariskian filtrations显示文摘 | Li Huishi Van Oystaeyen F | 1989 | Communication in Algebra1989，17，： | 1 |
| 12 | Synthesis and characterization of a novel magnetic carrier with its composi- tion of Fe3 04 /carbon using hydrothermal reaction 显示文摘 | Wang Zhifei Guo Huishi Yu Yinglei | 2006 | J Magn Magn Mater2006，302，2： | 1 |
| 13 | Synthesis and characterization of a novel magnetic carrier with its composition of Fe3O4/carbon using hydrothermal reaction显示文摘 | WANG Zhifei GUO Huishi YU Yinglei | 2006 | Journal of Magnetism and Magnetic Materials2006，302，2： | 1 |
| 14 | Two applications of noncommutative Groebner basis显示文摘 | WU Yuchun ZHANG Jingliang | 1999 | Ann Univ Ferrara-Sez Ⅶ-Scienze Matematiche1999，，： | 1 |
| 15 | Angiotensin I-converting enzyme inhibitory peptides derived from food proteins and their physiological and pharmacological effects 显示文摘 | Guan HongLia GuoWeiLea Yong HuiShi etal | 2004 | Nutrition Research2004，24，7： | 1 |
| 16 | Supramolecular control of the branched topology of poly(sulfone-amine) from divinylsulfone and hexamethylenediamine 显示文摘 | Wan Huishi Chen Yan Chen Liang | 2008 | Macromolecules2008，41，2： | 1 |
| 17 | Sandy Land-lake-vegetation Landscape of Songnen Sandy Land of China:Pattern,Process and Mechanism显示文摘In order to investigate the dynamic evolution of the sandy land-lake-vegetation landscape in Songnen Sandy Land(SSL)and its response to climate change and human activities,the distribution pattern,evolution,and driving mechanisms of the landscape were analyzed based on Landsat satellite images and meteorological and socio-economic data during 1980–2020.The results indicate that the area of sandy land exhibited an upward fluctuation during the last 40 yr,with a net increase of 251.75 km^(2) at an increment rate of 3.80%/10 yr.The lake area also exhibited an upward fluctuation,with a net increase of 1200.95 km^(2) at an increment rate of 20.42%/10 yr.Vegetation coverage decreased by 2633.30 km^(2),with areas of low vegetation coverage exhibiting a trend of initial decline and subsequent increase,areas of medium vegetation coverage showed an upward fluctuation,and areas of high vegetation coverage showed a trend of initial increase and subsequent decrease,with overall changes of–0.67%/yr,1.12%/yr,and 0.17%/yr,respectively.The relationships between sandy land,lakes,and vegetation coverage were significant,with areas of sandy land and low vegetation coverage showing the strongest correlation.The dynamic evolution of landscape is controlled by regional climatic and socio-economic factors,with socio-economic factors as the first principal component contributing up to 59.64%. | DU Huishi HASI Eerdun | 2022 | Chinese Geographical Science2022，32，4： | 0 |
| 18 | Effects of Al_(2)O_(3)-SiO_(2) Raw Material Types on Properties of Anorthite Based Insulation Refractories显示文摘To optimize their Al_(2)O_(3)-SiO_(2) raw materials,anorthite based insulation refractories were prepared by the in-situ sintering process combined with the foaming method after sintering at 1350℃for 3 h,using green and pollution-free kaolin,kyanite,andalusite and sillimanite as Al_(2)O_(3)-SiO_(2) raw materials,respectively,and industrial CaCO_(3) as the CaO source.Effects of Al_(2)O_(3)-SiO_(2) raw material types on the physical properties,phase composition and microstructure were investigated.The results are as follows.All samples prepared by different Al_(2)O_(3)-SiO_(2) raw materials have hexagonal flake anorthite and a small amount of mullite and corundum.Their bulk density and thermal conductivity decrease in the order of using kaolin,andalusite,kyanite and sillimanite as the Al_(2)O_(3)-SiO_(2) raw material,but their apparent porosity increases.Moreover,in the sample with kaolin,the bonding between anorthite crystals on the pore walls is closer than that of the other samples,which is conducive to increasing the cold crushing strength.The bonding between anorthite crystals on pore walls gradually decreases in the order of using kyanite,andalusite and sillimanite as the Al_(2)O_(3)-SiO_(2) raw material,thus their cold crushing strength decreases accordingly.In comprehensive consideration,the properties of the sample from kyanite are the optimal.Its apparent porosity,thermal conductivity and cold crushing strength are 84.6%,0.141 W·m^(-1)·K^(-1) and 1.89 MPa,respectively. | DU Juan GUO Huishi YANG Jialin LI Wenfeng GUI Yanghai ZHAO Zhiqiang LIU Yingfan | 2024 | China's Refractories2024，33，1： | 0 |
| 19 | Characteristics of Sand Dune Pattern and Fluvial-aeolian Interaction in Horqin Sandy Land, Northeast Plain of China显示文摘The interaction between fluvial and aeolian processes can significantly change surface morphology of the Earth. Taking the Horqin Sandy Land as the research area and using Landsat series satellite remote sensing images, this study utilizes geomorphology and landscape ecology to monitor and analyze the aeolian geomorphology characteristics of the Horqin Sandy Land. Results show that the sand dunes of the Horqin Sandy Land are mainly distributed on alluvial plains along the banks of the mainstream and tributaries of the Western Liao River, and the sand dune types tend to simplify from west to east and from south to north. The aeolian geomorphology coverage tend to be decreasing in the past 40 years, with an average annual change rate of 0.31%. While the area of traveling dunes decreased, the area of fixed and semi-fixed dunes increased. The fractal dimensions of various types of sand dune have all remained relatively constant between 1.07 and 1.10, suggesting that they are experiencing a relatively stable evolutionary process. There is a complex interaction between fluvial and aeolian processes of the Horqin Sandy Land, which plays a central role in surface landscape molding. Sand dunes on both sides of different rivers on the Horqin Sandy Land present certain regularity and different characteristics in terms of morphology, developmental scale, and spatial pattern. There are six fluvial-aeolian interaction modes in this area: supply of sand sources by rivers for sand dune development, complete obstruction of dune migration by rivers, partial obstruction of dune migration by rivers, influence of river valleys on dune developmental types on both sides, influence of river valleys on dune developmental scale on both sides, and river diversion due to obstruction and forcing by sand dunes. This study deepens our understanding of the surface process mechanism of the interaction between fluvial and aeolian processes in semi-arid regions, and provides a basis for researches on regional landscape responses in the context of global environmental change. | DU Huishi WANG Zongming MAO Dehua | 2018 | Chinese Geographical Science2018，28，4： | 0 |
| 20 | Recognizing the Semiprimitivity of N-graded Algebras via Grobner Bases显示文摘 | Huishi Li | 2015 | Algebra Colloquium2015，22，3： | 0 |
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