The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The relationship between surface slope and vegetation cover change is the basis for vegetation protection adjusting measures to differing conditions. Researching the spatial relationships between vegetation cover change and ground slope has great significance. Based on MODIS data, the results obtained in this paper demonstrate a temporal-spatial distribution and trends of NDVI in Hubei Province, and...
This study used spatial autoregression (SAR) model and geographically weighted regression (GWR) model to model the spatial patterns of farmland density and its temporal change in Gucheng County, Hubei Province, China in 1999 and 2009, and discussed the difference between global and local spatial autocorrelations in terms of spatial heterogeneity and non-stationarity. Results showed that strong spatial...
In recent decades, Geographic Information System (GIS) has developed rapidly and has been integrated into all walks of our life. With the changes of people's needs, only some old GIS software could not meet the needs of the market[1]. To meet the growing needs, the GIS secondary development came into being. A large number of experts and scholars began to study it by using computer technology. Many...
As an important means of spatial data mining, spatial clustering has been applied to many fields at present. This paper presents a new method of spatial clustering based on Huffman tree. Using this method, we make quantitative analysis of urban function partition. Moreover, the method has been implemented and applied in a case study in Wuhan city. Simulation experiments pointed out that the method...
Police emergency response system plays a nuclear and key role in the emergency management system. The spatial range of emergency event spread area is usually dynamic diffused through time. This problem will make emergency response difficult to assess emergency event and dispatch emergency resources. Therefore, it is imperative to design and implement a spatial diffusion model to solve this problem...
The question which how to select the most superior fitting mode of variogram is one of basic questions which in current geostatistics not yet completely solves. In view of this question, this article proposed take lag as the weight coefficient to establish objective function and establish the variogram fitting method based on the evolutionary programming. This method dynamic estimates the parameter...
Using strain precursor to predict the earthquake has proven to be crucial for earthquake early warning. However, there is currently problem that it is hard to establish more effective intelligent analyzing models for earthquake early warning. In this paper, we introduced the core concept and ideas of JRG Sub-cluster statistics theory and three risk limits at first. Meanwhile, we put forward the analyzing...
Through analysis to workflow of Police Emergency Response System, this paper took emergency theory as guideline, built Police Emergency Response and Decision-making Model System and then classified the Decision-making Models System into emergency evaluation model, prior emergency response plan model, emergency forecast model, emergency resources assessment model and emergency response and deployment...
Ontology is increasingly being used to build applications that utilize domain-specific knowledge. This paper addresses the problem of supporting ontology-based semantic query in RDBMS, and proposes the model of ontology-based semantic query in RDBMS. The model consists of three key components. The first part is about ontology technique, and it is the basis and foundation of semantic query. The second...
Based on personalized facial feature and in order to meet the requirement of individual design product, an eyeglasses configuration design system based on facial feature in network environment is presented, which demands collaborations of customer, dealer and designer. In this system, the database of eyeglasses components is built by adopting parameterization feature design technology, 3D facial model...
In this paper the defeat of product configuration method based the problem of restriction- satisfied is analyzed. Aiming to the problem of low quality of solution, big algorithm space and low computing speed, a dynamic product configuration method based on ant colony algorithm is proposed. This method adopts ambiguous integrated judgment and other algorithm to build the filter at first. Then, through...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.