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1. A Telecom Anti-Fraud Approach Based on Graph | |||
Li Zhengzheng,Wang Chun | |||
Computer Science and Technology 05 February 2020 | |||
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Abstract:Currently, telecommunications fraud is on the rise. Traditional anti-fraud techniques are basically unable to capture various new telecommunication fraud methods. After studying the case of fraud, we proposes a telecom fraud detection method based on graph embedding, which is used to mine the potential features of the call correlation graph between fraudsters and users. First, the proposed approach is based on the embedding of attribute network, which not only saves the network structure information, but also incorporates the statistical features of the nodes extracted for the call behavior, in order to represent the nodes as low-dimensional vectors. Secondly, the proposed approach belongs to semi-supervised learning. In the supervised part, the corresponding labels are predicted. In the unsupervised part, the node context vector is predicted. Both share parameters and optimize the model at the same time. When experimenting on the telecommunications fraud dataset, compared with other baseline approaches., the experimental results prove the effectiveness of the proposed method in countering telecommunications fraud. | |||
TO cite this article:Li Zhengzheng,Wang Chun. A Telecom Anti-Fraud Approach Based on Graph[OL].[ 5 February 2020] http://en.paper.edu.cn/en_releasepaper/content/4750616 |
2. Integrating Ecological Effects Assessment and Scenario-Based Simulation to Optimize Spatial Management Decisions: a Case Study of Three Gorges Reservoir Area | |||
LIU Minghao,FENG Yuan,YUAN Min,LI Yuting | |||
Computer Science and Technology 14 May 2018 | |||
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Abstract:It is of great significance to promote the sustainable development of land by revealing the spatial temporal evolution law of land use and land cover change (LUCC), and identifying the ecological security. Three different development scenarios (low speed development, inertia development, rapid development) of the Three Gorges Reservoir Area(TGR)are designed based on the dynamic change model of urban and rural land use by using DYNA-CLUE software to simulate the spatial distribution pattern of land use in TGR, along with the human affect index (HAI), ecological risk index (ERI) and ecosystem service value (ESV) are used to assess the ecological effects of the different development scenarios. Results shows that, (1) the ROC test values of the logistic regression model between driving factors and grassland, cultivated land, shrub land, forest land, wetland, water body and artificial surface respectively were 0.61, 0.647, 0.819, 0.987, 0.777, 0.935, 0.927; (2) the land use distribution was simulated from 2000 to 2010, and the model validation shows that the total kappa reaches 79%, comparing the simulation results with the land use status in 2010;(3)From the ecological effect evaluation, the scenarioⅠis the best, the scenarioⅡ is the worst, and the scenario III is between the scenarioⅠand the scenarioⅡ;(4)from the perspective of time , ecological risk presents a gradual shift trend of from low to medium and high risk with the passage of time; from the perspective of space, relatively strong ecological risk areas are mainly concentrated in the riparian zone along the Yangtze River west of Wanzhou, while the extremely strong ecological risk area are mainly concentrated in the urbanized area of Chongqing metropolitan area. | |||
TO cite this article:LIU Minghao,FENG Yuan,YUAN Min, et al. Integrating Ecological Effects Assessment and Scenario-Based Simulation to Optimize Spatial Management Decisions: a Case Study of Three Gorges Reservoir Area[OL].[14 May 2018] http://en.paper.edu.cn/en_releasepaper/content/4744748 |
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