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| 1 | Waveguides Written and Stored by Photovoltaic Dark Spatial Solitons in LiNbO_(3):Fe Crystals显示文摘To our knowledge, we have demonstrated for the first time that (2+1)-dimension photorefractive waveguides can be written and stored by light using the (2+1)-dimension photovoltaic dark spatial solitons in LiNbO3:Fe crystals. It can guide a probe beam of the same wavelength as that of the writing beam. | LIU Si-min ZHANG Guequan SUN Qian XU Jing-jun ZHANG Guang-ying TONG Yi-cheng | 1996 | Chinese Physics Letters1996，13，10： | 6 |
| 2 | Fractal characterization of sediment particle-size distribution in the water-level fluctuation zone of the Three Gorges Reservoir, China显示文摘The combined effect of periodic water impoundment and seasonal natural flood events has created a 30 m high water-level fluctuation zone(WLFZ) around the Three Gorges Reservoir(TGR), China, forming a unique eco-landscape. Siltation, eutrophication, enrichment of heavy metals, and methane emissions in the WLFZ have been widely associated with sediment and soil particles generated from the upstream catchment or upland slopes. However, little attention has been paid to the complexity of sediment particle-size distributions in the WLFZ. In the present study, core samples(from a 345 cm thick sediment core from the base of the WLFZ), slope transect surface samples(across/up a WLFZ slope), and along-river/longitudinal surface samples(from the reservoir reaches) were collected. Laser granulometry and a volume-based fractal model were used to reveal the characteristics of sediment particle-size distributions. Results indicate that the alternation of coarse and fine particles in the sedimentary core profile is represented as a fluctuation of low and high values of fractal dimension(D), ranging from 2.59 to 2.77. On the WLFZ slope transect, surface sediment particles coarsen with increasing elevation, sand content increases from 3.3% to 78.5%, and D decreases from 2.76 to 2.53. Longitudinally, surface sediments demonstrate a downstream-fining trend, and D increases gradually downstream. D is significantly positively correlated with the fine particle content. We conclude that D is a useful measure for evaluating sediment particle-size distribution. | LI Jin-lin BAO Yu-hai WEI Jie HE Xiu-bin TANG Qiang Jean de Dieu NAMBAJIMANA | 2019 | Journal of Mountain Science2019，16，9： | 5 |
| 3 | 3D visualization model and key techniques for digital mine显示文摘Digital mine is the inevitable outcome of the information processing, and is also a complicated system engineering. Firstly, for the 3D visualization application of the digital mine, the ground and underground integrative visualization framework model was proposed based on the mine entity database. So, the visualization problem was availably resolved, as well as the professional analytical ability was improved. Secondly, aiming at the irregularities, non-uniformity, dynamics of mine entities, mix modeling method based on the entity character was put forward, in which 3D expression of mine entities was realized. Lastly, the 3D visualization project for a copper mine was experimentally studied. Satisfactory results were acquired, and the rationality of visualization model and feasibility of 3D modeling were validated. | JIN Bao-xuan1,FANG Yuan-min2,SONG Wei-wei2 1. Yunnan Provincial Geomatics Centre, Kunming 650034, China 2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China | 2011 | 中国有色金属学会会刊:英文版2011，21，S3： | 4 |
| 4 | The Challenges of Global Climate Change to Green Development and its Legislative Response显示文摘Global climate change has swept across every nation,community,business,and individual on the planet. It is essential to find a fundamental solution to address climate change from a broader perspective. Climate change legislation should followthe principle of the sustainable development,polluter pays principle,the principle of the common but differentiated responsibilities as well as the principle of subsidiarity. Under the guidance of the four basic principles of legislation,the international field should build the legal system of the global climate governance,China should formulate special'the act of addressing climate change'. | Wang Lingbo | 2019 | 学术界2019，，1： | 0 |
| 5 | Fractal Analysis on the Spatial Structure of Land Use Patterns in a Non-Point Source Polluted Area in Southern China显示文摘Based on the TM remote sensing interpretation of land use data of a non-point source polluted area in southern China in 2015, supported by ArcGIS and the fractal theory, this paper established the perimeter-area fractal equation of the spatial structure of land use types, quantitatively calculated the fractal dimension and stability index of various land use types in this non-point source polluted area in 2015, and analyzed the spatial structure characteristics of land use types. The results showed that the fractal dimension values of the different land use types in the research area ranged 1.141–1.657, and the whole fractal dimension of the research area was 1.206. To be specific, the fractal dimension values of unused land, grass land and rural residential land were high, and the fractal dimension values of dry land, paddy filed and waters were low, and the fractal dimension values of urban land, industrial traffic construction land and forest land were moderate. The area of the land use types whose stability index values were 0.2–0.4 accounted for 89.5% of total area, suggesting that the stability of the spatial structure of land use types of Beibei District in 2015 was not high generally. The rural residential land and urban land of the research area should be planned and managed more properly from now on. | RONG Kun | 2019 | Journal of Landscape Research2019，11，3： | 0 |
| 6 | A FRACTAL STUDY ON URBAN SYSTEM IN NORTHEAST CHINA显示文摘AFRACTALSTUDYONURBANSYSTEMINNORTHEASTCHINA￥LiuJisheng(DepartmentofGeography,NortheastNormalUniversity,Changchun130024,PRC)(Ma... | 刘继生 | 1996 | Chinese Geographical Science1996，6，3： | 0 |
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