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 modeling and forecasting of the ionospheric delay is crucial in Global Positioning System (GPS) applications. In this study, a mathematical model that combines the polynomial function with B-spline function is put forward to estimate the regional ionospheric delay. In order to increase the forecasting accuracy, an integration forecasting method based on Holt–Winter model and Markov model is proposed...
the recognition of face direction is an important part of the artificial intelligence. In recent years, BP network has been used for pattern recognition. However, in practical application, BP has some disadvantage. The widely used BP algorithm has slow convergent speed and learning efficiency, and it is easy to get into local minimum. Selection of the initial value of the BP network can also affect...
At present government entity information system is independent construction by entity, there are many differences in the using software, data formats, and other aspects, It lacks of unified planning and overall normative standards, resulting in difficulties of information sharing and interaction between various systems. Therefore, We should plan by emergency data sharing and exchange platform uniformly,...
The ant colony algorithm is widely applied to optimize the complex problems in many fields with its features of being robust, parallel, flexible, demanding no artificial interference, and accurate. This paper discusses the application of the colony algorithm in the path search of the earthquake emergency rescue. We first construct a mathematical model for emergency rescue based on the earthquake disasters...
In object detection based on computer vision, object extraction is very important. A method and apparatus for extracting interest region from an image is proposed in this paper. First, the approach locate all “interest” pixels within the image by extraction function, which compares the brightness of current pixel with the mean of neighboring pixels and set a threshold to determine whether the pixel...
Location based service (LBS) is becoming one of the most promising application with the rapid development of wireless communication, mobile computing, and location positioning technologies. Now Geography Markup Language (GML) is emerging as the de facto standard in representing and exchanging geographic information that includes both the spatial and non-spatial properties of geographic features over...
Traveling Sales Problem is one of the NP complete problems. The TSP Problem is transformed into a minimized optimal problem without being constrained. The Ant Colony Optimal algorithm has a good effect in solving the TSP problem. This paper discusses the application of the NAX-MIN ant system in the path search of the earthquake emergency rescue. We construct a mathematical model which is based on...
It is very important in the contingency logistics system to complete distribution task rapidly, the path planning method is a key factor in contingency logistics. A path planning approach based on Max-Min ant system is proposed in this paper. According to the specific characteristics of logistics in the practical application, the search path of the distribution is optimized and improved by using the...
This article raised the traffic detection and analysis program based on more and more data services in GPRS networks. By bringing in the traffic acquisition module, data analysis and processing module, database module and WEB terminal blocks, this article achieves the function of traffic collection, analysis and processing of the GPRS.
This paper presents a brief introduction to Web Service and P2P technology and analyzes their advantages and disadvantages, and gets the conclusion that P2P computing platform based Web Service is an ideal Web Service implementation. The cost of establishment and maintenance of system will reduce after adopting the service integration and resource autonomy of P2P. A P2P based Web Service architecture...
Mobile IPv6 was the IETF proposition to support host mobility in the Internet. However, MIPv6 only defines means of managing global (macro)-mobility but does not address micro-mobility separately. This involves long handover delay and signaling load. To solve this problem, the Hierarchical Mobile IPv6 (HMIPv6) protocol has been proposed by splitting the handover management into inter-domain mobility...
In ITS, vehicle detection is very important research field, which can provide the relevant information, such as position, shape, size, and so on. How to segment the vehicle is the key in vehicle detection. A simple vehicle segmentation algorithm based on computer vision is proposed in this paper. Firstly, an effective preprocessing method to eliminate the affection of different scale gray pixels in...
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.