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Estimates of Soil Organic Carbon Stocks in Zhejiang Province of China Based on 1:50000 Soil Database Using the PKB Method

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Pedosphere 2015年第1期25卷 12-24页

作者： ZHI Jun-Jun JING Chang-Wei lin sheng-pan ZHANG Cao WU Jia-Ping College of Environmental and Resource Sciences Zhejiang University Institute of Islands and Coastal Research Zhejiang University Department of Zoology Michigan State University

Soil organic carbon(SOC) is an important component of farming systems and global carbon cycle. Accurately estimating SOC stock is of great importance for assessing soil productivity and modeling global climate change. A newly built 1:50 000 soil database of Zhejiang Province containing 2 154 geo-referenced soil profiles and a pedological professional knowledge-based(PKB) method were used to estimate SOC stock up to a depth of 100 cm for the Province. The spatial patterns of SOC stocks stratified by soil types,watershed(buffer analysis), topographical factors, and land use types were identified. Results showed that the soils in Zhejiang covered an area of 100 740 km2 with a total SOC stock of 831.49 × 106 t and a mean SOC density of 8.25 kg m-2, excluding water and urban areas. In terms of soil types, red soils had the highest SOC stock(259.10 × 106t), whereas mountain meadow soils contained the lowest(0.15 × 106t). In terms of SOC densities, the lowest value(5.11 kg m-2) was found in skel soils, whereas the highest value(45.30 kg m-2) was observed in mountain meadow soils. Yellow soils, as a dominant soil group, determined the SOC densities of different buffer zones in Qiantang River watershed because of their large area percentage and wide variation of SOC density *** area percentages of various soil groups significantly varied with increasing elevation or slope when overlaid with digital elevation model data, thus influencing the SOC densities. The highest SOC density was observed under grassland, whereas the lowest SOC density was identified under unutilized land. The map of SOC density(0–100 cm depth) and the spatial patterns of SOC stocks in the Province would be helpful for relevant agencies and communities in Zhejiang Province, China.

关键词： elevation pedological professional knowledge-based method sampling depth slope SOC density soil groups

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Tetraphenylethene based zinc complexes as fluorescent chemosensors for pyrophosphate sensing

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Chinese Chemical Letters 2015年第7期26卷 877-880页

作者： Hao-Ran Xu Kun Li Shu-Yan Jiao ling-ling Li sheng-lin pan Xiao-Qi Yu Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University

We described a serious of zinc complexes that exhibit characteristic fluorescence responses toward pyrophosphate （PPi） and adenosine triphosphate （ATP） in aqueous media. These novel probes exploited tetraphenylethene （TPE） as fluorophore and macrocycle-polyamine （including 1,4,7,10-tetraazacyclo- dodecane and 1,4,7-triazacyclononane） Zn（ll） complexes as binding group. These ＂OFF-ON＂ type probes exhibited promising selectivity and sensitivity to PPi and ATP via a restriction ofintramolecular rotation （RIR） mechanism. The detection limit for PPi was found within nmol/L range.

关键词： Tetraphenylethene Cyclen PyrophosphatesZinc complex

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数字高程模型分辨率对流域地形特征参数的影响

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水科学进展 2012年第4期23卷 457-463页

作者：林声盼荆长伟 MOORE Nathan 吴嘉平浙江大学环境与资源学院 Department of Geography Center for Global Change and Earth ObservationsMichigan State UniversityEast Lansing48823USA

地形特征(如高程和坡度)和水文特征(如河流长度和河流坡度)是分布式流域水文水质模型的基础输入参数,用于量化描述模型模拟流域的自然特征。这些特征参数的准确性直接影响水文水质过程模拟的准确性。应用数字高程模型(Digital Elevation... 详细信息

地形特征(如高程和坡度)和水文特征(如河流长度和河流坡度)是分布式流域水文水质模型的基础输入参数,用于量化描述模型模拟流域的自然特征。这些特征参数的准确性直接影响水文水质过程模拟的准确性。应用数字高程模型(Digital Elevation Model,DEM)在4个不同地形的子流域研究了10种不同分辨率DEM对平均高程、流域面积、坡度、河流坡度、最长河长等参数的影响。结果表明,随着DEM分辨率降低,流域地形变缓,流域平均坡度逐渐减小;随着DEM网格分辨率的变化,子流域划分范围和河道位置也都可能发生变化,且该变化在地形起伏较小的丘陵平原地区较明显,子流域集水面积和河长进一步随之改变;河流坡度随DEM分辨率降低则呈无规则变化。从地形和水文参数两方面揭示了DEM分辨率在分布式流域模型中的不确定性影响。

关键词：数字高程模型分辨率分布式流域模型水文参数地形参数

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Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

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Science China Chemistry 2025年第01期 297-307页

作者： Bin Fang Limin Wang Haoqin Li Jiaxin Zhang Yang Ding pan pan Li Bo Peng Hua Bai lin Li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

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基于探索性空间数据分析的安吉县水土流失时空变异规律研究

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浙江大学学报（理学版） 2011年第6期38卷 708-715页

作者：江振蓝苏世亮荆长伟林声盼吴嘉平闽江学院地理科学系福建福州350108 浙江大学环境与资源学院浙江杭州310058

实时、准确地掌握区域水土流失时空变异规律是制定有效水土保持措施的关键.但目前水土流失时空规律分析鲜有兼顾定量数值特征与空间可视化特征.本研究利用探索性空间分析方法和遥感信息,在景观尺度上,对1994～2003年间浙江安吉县水土流... 详细信息

实时、准确地掌握区域水土流失时空变异规律是制定有效水土保持措施的关键.但目前水土流失时空规律分析鲜有兼顾定量数值特征与空间可视化特征.本研究利用探索性空间分析方法和遥感信息,在景观尺度上,对1994～2003年间浙江安吉县水土流失的时空动态格局进行分析.结果表明,10年间安吉县水土流失强度增加、影响范围扩大、水土流失高风险区面积增加.在500m×500m和1 000m×1 000m2种格网尺度上,水土流失空间格局均表现出明显的空间集聚性,但以500m×500m尺度上的表现更为显著.这种探索性空间分析方法,从定量的统计学和可视化角度有效地揭示了水土流失的时空变异规律,为相关部门和人员定量评价水土流失,制定有效的水保措施提供了新的方法和手段.

关键词：探索性空间分析水土流失修正通用水土流失方程(RUSLE) 时空变异安吉县

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水产种质资源地理信息系统设计与实现

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农业网络信息 2007年第12期 23-27页

作者：林声盼段金荣施炜纲南京农业大学渔业学院江苏无锡214081 中国水产科学研究院淡水渔业研究中心内陆渔业生态环境和资源重点开放实验室江苏无锡214081

水产种质资源地理信息系统是为了实现水产种质资源数据共享而开发的一个C/S模式共享平台。采用VB+MapX的二次开发方式,实现了空间数据与属性数据的互相查询、数据管理以及报表输出等功能,另外还绘制了水产物种省区分布图和水系分布图。

关键词：水产种质资源 MapX 物种地理分布地理信息系统

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Multi-type sensor placement and response reconstruction for building structures: Experimental investigations

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Earthquake Engineering and Engineering Vibration 2018年第1期17卷 29-46页

作者： Rong-pan Hu You-lin Xu sheng Zhan Department of Civil and Environmental Engineering The Hong Kong Polytechnic University

Estimation of lateral displacement and acceleration responses is essential to assess safety and serviceability of high-rise buildings under dynamic loadings including earthquake excitations. However, the measurement information from the limited number of sensors installed in a building structure is often insufficient for the complete structural performance assessment. An integrated multi-type sensor placement and response reconstruction method has thus been proposed by the authors to tackle this problem. To validate the feasibility and effectiveness of the proposed method, an experimental investigation using a cantilever beam with multi-type sensors is performed and reported in this paper. The experimental setup is first introduced. The finite element modelling and model updating of the cantilever beam are then performed. The optimal sensor placement for the best response reconstruction is determined by the proposed method based on the updated FE model of the beam. After the sensors are installed on the physical cantilever beam, a number of experiments are carried out. The responses at key locations are reconstructed and compared with the measured ones. The reconstructed responses achieve a good match with the measured ones, manifesting the feasibility and effectiveness of the proposed method. Besides, the proposed method is also examined for the cases of different excitations and unknown excitation, and the results prove the proposed method to be robust and effective. The superiority of the optimized sensor placement scheme is finally demonstrated through comparison with two other different sensor placement schemes： the accelerometer-only scheme and non-optimal sensor placement scheme. The proposed method can be applied to high-rise buildings for seismic performance assessment.

关键词： experimental investigation multi-type sensors inclinometer response reconstruction optimal sensor placement

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Mineralogical evidence of water activity in the northern lowlands of Mars based on inflight-calibrated spectra from the Zhurong rover

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Science China Earth Sciences 2023年第11期66卷 2463-2472页

作者： Honglei lin Yangting lin Yong WEI sheng GOU Chi ZHANG Renhao RUAN Yongxin pan Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

Hydrated minerals provide direct indications of the early Martian water environment. The various clay minerals and evaporite salts found to date are mainly exposed in the ancient southern highlands of Mars. While it is believed that the area of the northern lowlands could have hosted a global ocean in the past, its surface is covered with a layer of spectrally nonabsorbing materials, and orbital hyperspectral remote sensing has found only sparse evidence for the presence of water. China's first Mars exploration mission, Tianwen-1, landed in the putative ancient shoreline zone of the northern lowlands of Mars. Its rover,Zhurong, conducted high-spatial-resolution reconnaissance to reveal the geological and environmental evolution of this *** to frequent dust storms, not only is the Martian surface covered with dust, but also the spectral calibration panels on the rover are affected by dust coverage. Data from the shortwave infrared(SWIR) spectrometer onboard the rover are also affected by other environmental factors such as instrumental temperature changes and atmospheric carbon dioxide absorption. This study recalibrated the in situ SWIR data to minimize the impact of the above factors. The recalibrated spectral data show that the reflectance of the landing area falls within the normal range of Martian soil, and confirm the presence of several important absorption peaks. The absorption characteristics indicate the presence of polyhydrated sulfates, gypsum, and hydrated silicates in the surface materials along the rover track, with sulfate content of line.

关键词： Mars Water activity In-situ exploration Short-wave infrared spectrum Zhurong rover

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N-heterocyclic carbene-catalyzed radical reactions

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Science China Chemistry 2021年第1期64卷 7-16页

作者： Kun-Quan Chen He sheng Qiang Liu pan-lin Shao Xiang-Yu Chen School of Chemical Sciences University of the Chinese Academy of SciencesBeijing 100049China College of Innovation and Entrepreneurship Southern University of Science and TechnologyShenzhen 518055China

While N-heterocyclic carbene(NHC)catalyzed electron-pair-transfer processes have been developed into an important tool for synthetically important bond formations during the past decades,the corresponding radical reactions via NHC catalysis have only received growing attention in the past six *** into account the advantages NHC-catalyzed radical reactions might bring,such as creating new activation modes that were previously unobtainable,it is worthwhile to provide a conceptual understanding of this emerging ***,herein we give an overview of NHC-catalyzed radical reactions via different synthetic techniques.

关键词： N-heterocyclic carbene radical one-electron oxidant photochemistry electrochemistry

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General and efficient parallel approach of finite element-boundary integral-multilevel fast multipole algorithm

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Journal of Systems Engineering and Electronics 2008年第2期19卷 207-212页

作者： pan Xiaomin sheng Xinqing Center for Electromagnetics Simulation School of Information Science and Technology Beijing Inst. of Technology Beijing 100081 P. R. China

A general and efficient parallel approach is proposed for the first time to parallelize the hybrid finiteelement-boundary-integral-multi-level fast multipole algorithm （FE-BI-MLFMA）. Among many algorithms of FE-BI-MLFMA, the decomposition algorithm （DA） is chosen as a basis for the parallelization of FE-BI-MLFMA because of its distinct numerical characteristics suitable for parallelization. On the basis of the DA, the parallelization of FE-BI-MLFMA is carried out by employing the parallelized multi-frontal method for the matrix from the finiteelement method and the parallelized MLFMA for the matrix from the boundary integral method respectively. The programming and numerical experiments of the proposed parallel approach are carried out in the high perfor- mance computing platform CEMS-Liuhui. Numerical experiments demonstrate that FE-BI-MLFMA is efficiently parallelized and its computational capacity is greatly improved without losing accuracy, efficiency, and generality.

关键词： finite element-boundary integral-multilevel fast multipole algorithm parallelization.

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