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Understanding the dynamics of vegetation activity and its interaction with climate factors becomes an important issue in global change research. In this study, using satellite-derived normalized difference vegetation index (NDVI) data, we analyzed changes in vegetation growth at the region scale from 2000 to 2013 in Sichuan Province, China. And then explored the relationship between NDVI trends and...
Grassland, which has a great significance to human society, is susceptible to the drought. An efficient way to monitor the drought scale of grassland is imperative. In this paper, we proposed a new drought index named Grassland Drought Index (GDI) to monitor the drought conditions of the grassland ecosystem. The GDI was constructed by comprehensively integrating the soil moisture content, canopy water...
Due to the lack of environmental protection consciousness and the pursuit of short-term economic benefits, many people overlook the protection and management of ecological environment in the development and operation process of tourist attractions. Our study tends to build an index system for the ecological environment construction of the tourist attractions, in line with the negative influence that...
It is of firm evidence that international production fragmentation has improving effects on the industrial productivity of China. Based on the appropriate indicators and indices, this paper adopts fixed effects and the first-order difference method to explore the efficiency of international production fragmentation on different industries. The research shows international production fragmentation...
Traditional risk assessment methods of construction project are often affected by the subjective factors. In order to reduce or avoid the effect of subjective factors, This paper firstly established the project risk evaluation index system, based on the detailed analysis of the project's internal and external environment, then built up the risk evaluation model with BP neural network, learned and...
By combining the subjective and objective weights with the optimization technique, we construct an optimal model to make the deviation among the aggregated evaluation values as large as possible. Then the final weights of indices, which reflect the subjective and objective information, can be obtained. This approach is propitious to order schemes and select the best one.
In the remote sensing data processing the key in extracting thematic information is to compartmentalize the background and the anomaly. Anciently we use the singleness threshold parameter to extract the anomaly information in the same area. Actually different landscape area have different thematic information background, namely it have background spatial differentiation characteristic. So when we...
Water environment problems received extensive attention in recent years, take Jinan karst spring region for example, groundwater evolution characteristics were analyzed by observing changes of spring level, spring runoff, water quality and safety yield, authors thought the main reason of drying-up was inadequate understanding of the safety yield index. According to the characteristics of Jinan spring...
Aiming to provide a quantitative method of software quality assessment for the digitizing system of ethnic antiquarian resources, a quality model suitable for the system was introduced on basis of the three-layer software quality metric model by Walters and McCall. The characteristics of Tibetan, Mongolian, Uighur and other ethnic languages are also introduced. The application determines the grade...
The structured P2P overlay networks with the constant degree have the efficient data location mechanism. They reduce the maintenance cost caused by nodes joining/leaving the overlay network and make the items in routing table as less as possible. An enhanced structure based on the cycloid system is proposed in this paper. It combines cycloid and folded hypercube and employs the concept of complementary...
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