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With the scale of the urban population, urban rail transportation increasingly plays a heavy role in the sharing of passenger traffic in the cities. For the safe operation of the rail transportation system, there is need to analyze the characteristics of urban rail transport passenger flow. In this paper, based on the operation data of Beijing Metro Line four, the relevant indicators will be statistic,...
The objective of this study is to retrieve a spatially-explicit map of forest biomass, which is not only an important parameter to evaluate carbon storage but also a necessary initial value for process-based carbon cycle models to simulate carbon dynamics within a region. In this study, we used the latest eighth national forest inventory statistics (2009–2013) and the MODIS Land Cover Type product...
In this essay, we probe into the spatial distribution of Jingpo Nationality in the areas where they live in a compact community. Based on that and the census data in 2010, we forecast the basic situation of development in population of Jingpo in the future 50 years by population forecast software called spectrum. This essay gives the idea that the spatial distribution of Jingpo won't change a lot,...
Study on Spatial distribution of negative aero-anion concentration in the waterfall environment of ShiBiLiuzong. Results showed that the negative aero-anion concentration was decreased with the increase of the distance from the water fall center and the decreased degree tended to mitigation with the increase of the distance from the waterfall center. There was very significant difference among the...
Appraisal and analysing of eco-sensitivity is an effective and crucial way to determine areas where should establish and protect with emphasis. GIS(Geographic Information System), factor superposition method and analytic hierarchy process are adopted in this thesis. The authors choose five ecological factors which are elevation, slope, aspect, vegetation and hydrology to evaluate Eco-sensitivity of...
Based on the theory of random finite sets (RFS) and the generalized multi-target Bayes filtering, the probability hypothesis density (PHD) filter has emerged as a promising tool for the multi-target dynamic state estimation problem in recent years. However, except under some special circumstances, closed-form recursive update equations for the PHD filter do not exist and the sequential Monte Carlo...
Water vapor is a highly variable parameter in atmospheric processes and it plays a crucial role in atmospheric motions on a wide range of scales in space and time. GPS technique has been widely used in retrieving precipitable water vapor. Firstly the article has retrieved precipitable water vapor of Qinhuangdao and Shijiazhuang stations by GPS technique. Then it has researched two aspects of precipitable...
China's long-term urban-rural dual structure has enlarged the gap between urban and rural basic public services. One of the most important reasons for the gap is current spatial distribution and standards of basic public facilities in rural areas do not meet the demand of local development. To achieve the equalization about urban and rural basic public facilities is not only a new focus of urban and...
In this paper, it firstly establishes the assessment contents on uncertainty of multi-scale representation of point cluster around the process of multi-scale representation of point cluster and its spatial analysis, which includes positional uncertainty and uncertainty of spatial analysis conclusions; the assessment index K and the quantitative model of positional uncertainty related to point cluster...
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