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.
3D maps of emergency scenes offer more intuitive and more detailed spatial information to support emergency decision making. In this paper, the methodology of UAV route planning is introduced, which is used to guide the process of oblique photograph data collection for efficient 3D reconstruction of building model, and its practical problems during processing are analyzed. The methodology would meet...
This paper presents a GIS based dynamic modeling of fire spread using cellular automation simulation, given a set of stochastic ignition points and initial environmental settings. Modeling every individual room in the building as a cell, we have developed the algorithm for fire spread both from room to room inside a building and from one building to another due to radiation and branding. The models...
Disasters, like strong earthquakes, may cause different kinds of deformation and damages to urban buildings, which makes those buildings hard to recognize and extract through traditional ways. In this paper, a novel approach has been proposed to extract buildings that may suffer with various deformation due to the damage of disasters, from large urban 3D disaster scenes. The method relies on prebuilt...
Network centrality is an important index to measure the centrality of a node in a network. Calculating node centrality parameters is difficult, as networks become Large-Scale, it is essential to find out new algorithms to calculate the centrality of the more complex and bigger networks. Motivated by this trend, a new data structure and faster algorithm for nodes' centrality is provided in this paper...
With the rapid development of online social media, the short text has become the prevalent format for information of Internet. Due to the severe data sparsity issue, accurately discovering knowledge behind these short texts remains a critical challenge. Since regular topic models, such as the Latent Dirichlet Allocation (LDA), can not perform well on short texts, many efforts have been put on building...
This paper proposes a novel method for synthetic aperture radar (SAR) target detection by using multi-scale SAR images based on visual attention model, which can automatically find the vehicle targets from the complicated background with clutters such as trees and buildings. In our method, firstly, a saliency map is obtained from a Gaussian pyramid of the original SAR image, where the image scales...
Many European countries have taken steps toward a Supergrid in order to transmit large amount of intermittent and remote renewable energy over long distance to load centers. In the US, as the expected increase in renewable generation and electricity demand, similar problem arises. A potential solution is to upgrade the transmission system at a higher voltage by constructing a new overlay grid. This...
Losses caused by various disasters are continuing to rise as the global disasters frequently occur in recent years. In order to reduce the losses, UAV (unmanned aerial vehicle) technologies are increasingly employed in the emergency management field. Rapid emergency response has a strong demand for fast UAV image processing, while image mosaicking is one of the most important requirements. Whether...
Telecommunication base stations (TBS) in Guangzhou in China have large numbers, high inner heat density, long cooling season and high energy consumption. In order to make full use of the outdoor natural cooling resource, a ventilation cooling technology (VCT) was proposed. By applying VCT the inner heat generated by the telecommunication equipments can be directly taken away by the outdoor cool air...
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.