|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optimization of post-classification processing of high-resolution satellite image:A case study显示文摘The application of remote sensing monitoring techniques plays a crucial role in evaluating and governing the vast amount of ecological construction projects in China. However, extracting information of ecological engineering target through high-resolution satellite image is arduous due to the unique topography and complicated spatial pattern on the Loess Plateau of China. As a result, enhancing classification accuracy is a huge challenge to high-resolution image processing techniques. Image processing techniques have a definitive effect on image properties and the selection of different parameters may change the final classification accuracy during post-classification processing. The common method of eliminating noise and smoothing image is majority filtering. However, the filter function may modify the original classified image and the final accuracy. The aim of this study is to develop an efficient and accurate post-processing technique for acquiring information of soil and water conservation engineering, on the Loess Plateau of China, using SPOT image with 2.5 rn resolution. We argue that it is vital to optimize satellite image filtering parameters for special areas and purposes, which focus on monitoring ecological construction projects. We want to know how image filtering influences final classified results and which filtering kernel is optimum. The study design used a series of window sizes to filter the original classified image, and then assess the accuracy of each output map and image quality. We measured the relationship between filtering window size and classification accuracy, and optimized the post-processing techniques of SPOT5satellite images. We conclude that (1) smoothing with the majority filter is sensitive to the information accuracy of soil and water conservation engineering, and (2) for SPOT5 2.5 m image, the 5×5 pixel majority filter is most suitable kernel for extracting information of ecological construction sites in the Loess Plateau of China. | DONG Rencai DONG Jiajia WU Gang DENG Hongbing | 2006 | Science China(Technological Sciences)2006，49，z1： | 2 |
| 2 | Growth of soybean seedlings in relay strip intercropping systems in relation to light quantity and red:far-red ratio显示文摘 | Feng Yang Shan Huang Rencai Gao Weiguo Liu Taiwen Yong Xiaochun Wang Xiaoling Wu Wenyu Yang | 2014 | Field Crops Research2014，，： | 2 |
| 3 | Highest weight modules over pre-exp-polynomial Lie algebras显示文摘 | BATRA P GUO Xiangqian LU Rencai | 2009 | Algebra2009，322，12： | 1 |
| 4 | Growth of soybean seedlings in relay strip intercropping systems in relation to light quantity and red:far-red ratio显示文摘 | Feng Y Shan H Rencai G | 2014 | Field Crop Research2014，155，： | 1 |
| 5 | The f-depth of an ideal on a module 显示文摘 | Lti Rencai Tang Zhongming | 2001 | Proceedings of the American Mathematical Society2001，130，7： | 1 |
| 6 | Analysis of Urbanization Based on Center-of-gravity Movement and Characteristics in Songhua River Basin of China and its Southern Source Sub-basin between 1990 and 2010显示文摘Urbanization in modern times led to a series of development strategies that brought new opportunities in China. Rapid urbanization caused severe stress to the ecosystems and the environment. Using the center-of-gravity(COG) method and parameters such as population, economy, and land, we studied the urbanization pattern in Songhua River Basin and its southern source sub-basin from 1990 to 2010. Urbanization was analyzed based on the COG position, eccentric distance, movement direction of COG, and distance of COG movement. Various characteristics of urbanization in the southern source sub-basin of the Songhua River were explained in relation to the whole Songhua River Basin. Urbanization in the southern source sub-basin of the Songhua River is balanced, relatively advanced, and stable compared to the whole Songhua River Basin. The average eccentric distance between the urbanization COGs in the Songhua River′s south source basin indicated rapid expansion of land urbanization during the span of this study. A basic pattern of urbanization COG in the whole Songhua Basin was observed, but there existed differences among the three aspects of urbanization process. Land urbanization is still in its active stage, so future studies should focus on analysis of such urbanization trends. | FU Xiao SHEN Yuan DONG Rencai DENG Hongbing WU Gang | 2016 | Chinese Geographical Science2016，26，1： | 1 |
| 7 | Let scientific data sharing become the new normal for Chinese ecologists显示文摘Open access to scientific data now is essential to promote the regional and global research,which could provide a comprehensive perspective for better understanding and facilitate better-informed decision-making.As the world’s second-largest economy,China plays an important role in many research fields,including ecological and environmental sciences.However,there lacks a comprehensive scientific data sharing mecha-nism in many fields.Many scientists think that China should establish such a mechanism to promote the development of science and assist in making wiser decisions. | Rencai Dong Siyuan Li | 2016 | Ecosystem Health and Sustainability2016，2，5： | 0 |
| 8 | Weight modules over some Block algebras显示文摘In this paper, the Harish-Chandra modules and Verma modules over Block algebra L[G] are investigated. More precisely, the irreducibility of the Verma modules over L[G] is completely determined, and the Harish-Chandra modules over L[Z] are classified. | L RenCai Department of Mathematics, Suzhou University, Suzhou 215006, China | 2009 | Science China Mathematics2009，52，3： | 0 |
| 9 | Classification of Quasifinite Modules with Nonzero Central Charges for EALAs of Type A with Coordinates in Quantum Torus显示文摘The author first constructs a Lie algebra L := L(q,wd) from rank 3 quantum torus, which is isomorphic to the core of EALAs of type Ad-1 with coordinates in quantum torus Cqd, and then gives the necessary and sufficient conditions for the highest weight modules to be quasifinite. Finally the irreducible Z-graded quasifinite L-modules with nonzero central charges are classified. | Rencai LV | 2009 | Chinese Annals of Mathematics,Series B2009，30，2： | 0 |
| 10 | Quantification of urban greenery using hemisphere-view panoramas with a green cover index显示文摘Urban greenery has positive impacts on the well-being of residents and provides vital ecosystem services.A quantitative evaluation of full-view green coverage at the human scale can guide green space planning and management.We developed a still camera to collect hemisphere-view panoramas(HVPs)to obtain in situ heterogeneous scenes and established a panoramic green cover index(PGCI)model to measure human-scale green coverage.A case study was conducted in Xicheng District,Beijing,to analyze the quantitative relationships of PGCI with the normalized difference vegetation index(NDVI)and land surface temperature(LST)in different land use scenarios.The results show that the HVP is a useful quantization tool:(1)the method adaptively distinguishes the green cover characteristics of the four functional areas,and the PGCI values are ranked as follows:recreational area(29.6)>residential area(19.0)>traffic area(15.9)>commercial area(12.5);(2)PGCI strongly explains NDVI and LST,and for each unit(1%)increase in PGCI,NDVI tends to increase by 0.007,and(3)LST tends to decrease by 0.21 degrees Celsius.This research provides government managers and urban planners with tools to evaluate green coverage in complex urban environments and assistance in optimizing human-scale greenery and microclimate. | Yonglin Zhang Shanlin Li Xiao Fu Rencai Dong | 2021 | Ecosystem Health and Sustainability2021，7，1： | 0 |
| 11 | A database framework of digital forestry towards sustainable forestry development in China显示文摘Six forestry scientific and technological projects being actualized in China were the implementations of ecological construction and security, development of forestry biological technique and fine variety cultivation, protection and utilization of forest biological germplasm resources, development of forestry bio-industry and digital forestry, and construction of forestry innovation ability. Among them, digital forestry was an effective measure to improve the ability of forestry innovation, to realize resources sharing, and to develop sustainable forestry. Spatial database of digital forestry should be constructed according to the criteria and index system of forest sustainable management. Based on analyzing the status and advances of China's digital forestry construction, a database framework of digital forestry towards sustainable forestry development was studied and established preparatorily. The database was divided into four layers as theory layer, system layer, status layer, and parameter layer. It was concluded that during the process of digital forestry platform construction, the relative social, economic, and politic data should be considered and collected, which meant that the database should represent not only the current forestry development, but also the social, politic, and economic situations. Constructing China's digital forestry information platform under full utilization of idea and index system for sustainable forest management was urgent and important. | ZHAO Jingzhu WANG Yanchun DONG Rencai | 2006 | Science China(Technological Sciences)2006，49，z1： | 0 |
| 12 | B1-cell-produced anti-phosphatidylserine antibodies contribute to lupus nephritis development via TLR-mediated Syk activation显示文摘Autoantibodies produced by B cells play a pivotal role in the pathogenesis of systemic lupus erythematosus (SLE). However, both the cellular source of antiphospholipid antibodies and their contributions to the development of lupus nephritis (LN) remain largely unclear. Here, we report a pathogenic role of anti-phosphatidylserine (PS) autoantibodies in the development of LN. Elevated serum PS-specific IgG levels were measured in model mice and SLE patients, especially in those with LN. PS-specific IgG accumulation was found in the kidney biopsies of LN patients. Both transfer of SLE PS-specific IgG and PS immunization triggered lupus-like glomerular immune complex deposition in recipient mice. ELISPOT analysis identified B1a cells as the main cell type that secretes PS-specific IgG in both lupus model mice and patients. Adoptive transfer of PS-specific B1a cells accelerated the PS-specific autoimmune response and renal damage in recipient lupus model mice, whereas depletion of B1a cells attenuated lupus progression. In culture, PS-specific B1a cells were significantly expanded upon treatment with chromatin components, while blockade of TLR signal cascades by DNase I digestion and inhibitory ODN 2088 or R406 treatment profoundly abrogated chromatin-induced PS-specific IgG secretion by lupus B1a cells. Thus, our study has demonstrated that the anti-PS autoantibodies produced by B1 cells contribute to lupus nephritis development. Our findings that blockade of the TLR/Syk signaling cascade inhibits PS-specific B1-cell expansion provide new insights into lupus pathogenesis and may facilitate the development of novel therapeutic targets for the treatment of LN in SLE. | Kongyang Ma Wenhan Du Shiyun Wang Fan Xiao Jingyi Li Jie Tian Yida Xing Xiaodan Kong Ke Rui Rencai Qin Xiaoxia Zhu Jing Wang Cainan Luo Haijing Wu Yun Zhang Chengping Wen Lan He Dongzhou Liu Hejian Zou Qianjin Lu Lijun Wu Liwei Lu | 2023 | Cellular & Molecular Immunology2023，20，8： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员