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.
A multi-radio wireless mesh network has the potential to provide higher throughput and a variable-width spectrum allocating strategy can bring this potential into play. This paper presents an improved packing algorithm base on interference condition in the wireless communication model and the characters of wireless mesh networks. Due to the fact that interference range varies with its channel width,...
This paper chose the WM-G-MR-09 chip, designed and implemented WiFi communication module, set up a real mobile network environment base on Windows CE operating system platforms and IEEE 802.11b wireless network interface. Achieved AODV (Ad-Hoc on-demand Distance Vector) routing algorithm module by calling the API in an adding routing function module. The validation and testing for the algorithm module...
All applications of the wireless sensor network is closely related to the underlying environment in which the sensors are deployed. The topology of the sensor network is great importance for sensor network applications and the implementation of networking function[1]. The recognition of the boundary or the inner hole boundary of the network is the basic of a broad spectrum of algorithms. In the paper...
Virtualization and cloud computing platform brought the new combination of resources integration and use mode. Cloud computing distributes computing tasks to large pools consists of computing resources to make all kinds of application system could acquire services according to need; The Virtualization technology can greatly improve the efficiency and availability of resources and application in cloud...
To deal with the safety weakness in resisting active attacks from malicious nodes, trust metric is introduced to combat the attacks by using a trust model on the proposed distance-based location-aided routing (DBLAR). The improved routing ST-LAR uses direct trust and recommendation trust to avoid malicious nodes with low trust value from joining the forwarding. Simulation results show that ST-LAR...
WMN (Wireless Mesh Network) attracts more and more attentions for its properties of high throughput, reliability and so on. While OR (Opportunistic Routing) is one of the “hot spots” in WMN. This paper describes HTOA, a system that aims to improve the throughput of wireless mesh networks. Any nodes act as a forwarder need to mix the “symbols” using network coding before sending messages. HTOA operates...
Ant Colony Algorithm has some advantages in solving complex optimization problems, in particular discrete optimization problem. A mine locomotive scheduling algorithm based on the improved Ant Colony Algorithm for the mine locomotive scheduling problem has proposed in this paper. The method takes simulated annealing algorithm as a local search strategy of ant colony algorithm, aim at expanding the...
In this paper, a unit designed for purpose data programming to multi serial DataFlashs has been proposed. In hardware, it is composed of one MCU(Micro Control Unit) and multi serial DataFlashs connected to MCU by SPI interface which result to easy design and save GPIOs; in software, an Object-Oriented cooperative scheduler is applied and runs on the microcontroller, and a communication software used...
A new control algorithm which based on PID algorithm was proposed for the smart car control system. The parameters of the algorithm were variable. The algorithm had adaptable function and path memory ability. The core control unit of the system is MC9S12DG128B by Freescale Company. Infrared ray sensors are used to distinguish the black line from the white race road, and check the smart car whether...
In Cellular Network, some factors make users experiencing poor channel quality usually have low data-rate connections with the base-station, such as interference, blocking by building, large number of users and long transmission distance. By utilizing Ad-Hoc Network node as a relay, users can obtain higher data-rate when connecting with the base-station. Traditional routing protocol in Ad-Hoc Network...
Because of existence of the interference, WMNs' end-to-end throughput usually is not very ideal. In order to solve this problem, this paper design an topology algorithm which via combining collision domain load and power control to structure network topology and optimize network throughput. The algorithm adjust each node transmission power to a reasonable leve after construct the network topology,...
Based on studying the characteristics of topology and business model of wireless mesh networks, depth analysis of the suitable routing protocol type for WMN was given out which shows that proactive hop-by-hop routing is most suitable for WMN. On the basis of Optimized Link State Routing which is a typical proactive hop-by-hop routing protocol. A routing protocol P-OLSR of perceptive 1inks is proposed...
These different applications require different QoS (Quality of Service) guaranteed in wireless mesh networks, such as IP telephone, video conference, video on demand (VOD), remote education and other real-time multimedia business, e-commerce. In order to achieve the satisfactory performance in WMNs, we put forward a QoS guaranteed hybrid channel assignment strategy for a multi-Interface wireless mesh...
The routing protocol is the hot spot in study of WS. In recent years, many researchers focus on location free data-centric routing protocol and proposed a series of methods. However, these methods are either fragile in WSN of complex topology features or not distance-sensitive. In this paper, we propose a medial axis and double ruling based routing (MADR) for data-centric WSN without geographical...
In this paper, Bayesian decision theory is discussed. Bayesian decision related to the basic elements and the principles as well as the Bayes optimal decision criteria is introduced briefly. Its characteristics, advantages and disavantages as well as the applicable targets are analysed in this paper, in the end, the new application situation is introduced.
This paper researches on the issue of computer recognition to the handwritten character images, including lowercase letters and Arabic numerals. In this paper, we preprocess on characters in order to unified the basic features. And then, we apply the basic method of making the grids to extract the features of character, and classify the respectives. At last, we apply the latest heuristic modifications...
Collision is a familiar problem in an RFID system. How to solve this problem effectively is very important to the whole RFID system. Anti-collision technology is one of the key factors that determine RFID system performance, especially for UHF RFID, multiple object identification depends on anti collision performance, This paper emphatically studies the solution and improvement of anti-collision algorithm...
In this paper, it is proposed the improved RBAC model based on traditional RBAC. The improved RBAC model adds restrictions on the role assignment for the user and introduces user group, it improves the system security and flexibility, reducing the complexity of the permission assignment. The improved RBAC model can be easily applied to other information systems, now it has practical significance in...
OPC is difficult to identify the released bubble in the process of the sample flowing, thus affecting the counting efficiency. This paper presents a bubble Identification method based on ANN, by increasing the number of detection angle and choosing the lateral light structure, conducive to ANN processing FD samples, according to the different refractivity to distinguish bubble. Simulation results...
TCS230D color sensor is a programmable light-convert-frequency sensor made IN TAOS Corp. in America. It has the character of high solution, programmable color channel output, also the output signal is digital which make it easy to connect to universal MCU. This article mainly focus the process used the highly quality algorithm to identify color and the application of the algorithm. This is feasible...
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.