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.
This paper describes a road condition perception and forward collision warning system (PWS). It enhances the capability of road condition perception, and improves the drive-safety. Firstly the research background, development of intelligent vehicle and road condition perception technology are introduced. Then the structure of PWS is proposed. It consists of three levels: road condition perception...
ITS is a typical multi-Agent system, subsystem in ITS is looked as agent, which comprise various granularity agent within each agent, simultaneity. In order to solve coordination of MAS-ITS, we use a society behavior coordination model.
In this paper, it presents E-RBAC model expanded on the traditional RBAC. The E-RBAC model has two ways of user authorization and introduces user group, module, role priority, it improves the system security and flexibility, reducing the complexity of the permission assignment. The expanded RBAC model can be easily applied to other information systems, now it has practical significance in the management...
A novel vision method is proposed to correct the robot heading angles in this paper. The salient feature point with known relative position to the target was chosen as the reference point. And the pose adjustment quantities of the robot were determined according to the navigation curve which is composed of the images of the reference point. This algorithm uses only one reference point and has the...
Being aimed against to the software reusability and interoperability, we design a metadata-driven information management system. when developing a new application, we can search quickly, locate, and reconstruct on existing IT resources by meta-data description, discovery, mapping and conversion. In the three-tier architecture based on the SSH, we implement B/S model of information management systems...
How to select the service components and coordinate services composition have become key problems in dynamic web services. Based on the original discrete probability distribution, we propose a QoS model to support dynamic Web services composition, develop a WS_TSC algorithm for services composition QoS. We finally carry out a simulation experiment via this algorithm. Compared with San-Yih Hwang's...
Aimed at the multi-disciplinary electronic circuit experiment teaching, a new handhold experiment score login system is designed. The system framework structure and implementation are also described. The teacher can login experiment scores by wireless sense in the teaching process through this system. This system can generate experiment registry and summary, and then store them in the teacher's PC...
The paper proposes a decentralized concurrently transmission strategy in a single-channel by non-cooperate game. Firstly, we formulate a channel access game model, which considers multiple nodes concurrent transmissions in a single-channel for wireless ad hoc networks. We identify the utility function balanced throughput and cost, and then calculate a Nash equilibrium solution (NES) as the transmission...
In many typical wireless sensor networks, the nodes are fixed, where cluster based protocols like LEACH were suitable for routing. However, it is another story when the nodes are mobile. This paper proposes a novel routing protocol supporting node mobility called “2L-LEACH-M”, it divides the nodes into two levels: level 1 (cluster-head level) or level 0 (member level), which makes mobile nodes find...
This paper addresses a method to measure the relative configuration and velocity of a leading mobile robot with respect to the following robot using monocular vision. This method can obtain single solution in certain conditions and has high precision. Simulation results show it is feasible.
This paper begins with an analysis of the defects of low efficiency and weak security of P2P network in the resource discovery, followed by the design of a trust rating classification model of vertically hierarchical structure and horizontal sub-domain. On the basis of the model that the all the nodes are divided into different layers vertically and different sub-domains horizontally, a classification...
Kademlia is a famous routing algorithm based on distributed hash table and it established a new topological relation in P2P network. However, some shortages in searching efficiency and the strategy of cache need to solve. This paper introduces a method to improved Kademlia model. After improved, the new algorithm not only inherits the advantages of Kademlia but also improve query efficiency.
This paper have designed a kind of UHF RFID based on ISO/IEC 18000-6B standard and supporting multiple fieldbus. Hardware were mainly introduced from the reader hardware and fieldbus control module circuits, and software were respectively introduced from system master programs and bus receiver and launching system software. With the development of RFID, developing supporting fieldbus UHF RFID has...
The replica placement problems (RPPs) in the Content Distribution Networks have been widely studied. In this paper, the Multiple Minimum Cost Flow Model (MMCFM) with server storage constraints is proposed for the RPPs for the first time. Since traditional minimum cost flow algorithm can not be applied to solve our model, MMCFM is converted to an equivalent Mixed Integer Programming (MIP) and furthermore...
The business process can be significantly improved and optimized with the applications of workflow engine, and the business process control can be well implemented. According to solute the problem of the automation of workflow and the construction of process application, the technology of workflow engine of the workflow middleware in business platform is studied. The technology of Web service is analyzed...
The paper present a method utilizing power variation to predict the topology changing and link state which are used to improve ODMRP Multicast Routing Algorithm. The improved protocol reduces the routing failure number and the delivery delay and enhances the performance of network in frequently changing topology conditions.
The wireless sensor network is composed of many low price sensor nodes, these sensor nodes form multi-hop wireless network and complete the large-scale sensing task in cooperation. The wireless sensor network has a widespread application prospect, it has attracted people's universal attention. In this paper, the traditional wireless sensor network's routing algorithm is analyzed and a directed routing...
Based on the method of image edge detection on gray weighted absolute correlation degree of Gray System Theory, a novel method for image edge detection is presented based on grey weighted absolute correlation degree and the classical Prewitt edge detection operator. The method is to take the Prewitt operator as reference sequence, and calculate the grey weighted absolute correlation degree of the...
A neural network based direct adaptive dynamic inversion control method is proposed for manipulator system's characteristics of nonlinear time-varying, multivariable, strong coupling. Basic control law is designed by nonlinear dynamic inversion method. Because of the nonlinear system inversion error which caused by the inaccurate model and uncertainties, fuzzy cerebella model articulation controller...
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.