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In order to realize high accuracy and excellent reliability of navigation system, information fusion technology of integrated navigation based on self-adaptive filter is researched in this paper. Inertial navigation system (INS), global navigation satellite system (GNSS), synthetic aperture radar (SAR) and barometric altimeter (BA) are taken to construct INS/GNSS/SAR/BA integrated navigation system...
As one of the most important tasks of Web Usage Mining (WUM), web user clustering, which establishes groups of users exhibiting similar browsing patterns, provides useful knowledge to personalized web services. In this paper, we cluster web users with KMeans algorithm based on web user log data. Given a set of web users and their associated historical web usage data, we study their behavior characteristic...
This paper describes a sensor registration methodology to estimate attitude biases in a multi-target multi-sensor environment. First, the available pairwise sensor alignment algorithm in Earth-Centered Earth-Fixed (ECEF) coordinates is introduced. However, for the multi-target multi-sensor environment, this method will result in non-unique alignment solutions, which is undesirable for many applications...
A Prediction Model and two improved models are proposed and analyzed in this paper, aiming to solving the task of peers' attribute data prediction in a p2p network. The simulation results demonstrate that the Basic Grey Prediction Model performs well under the condition that the accumulation of Raw Data Series complies with the positive or negative growth of an exponential function. When this condition...
Wind energy resource is green energy of non-polluting and makes a least impact on the environment among kinds of energy. Therefore, in order to promote economic and social development and ease the conventional energy resources limited and the problem of environmental pollution, wind energy and other renewable resources have be paid attention to in various countries. In this paper the structure of...
To solve the security issues of digital cinema projection equipments, and avoid video data to be illegal theft or malicious tampering, this paper proposes a new type of design for encrypting digital movies using advanced symmetric encryption algorithm - AES128 with TMS320DM6446 and DaVinci technology. The project takes full advantage of the characteristics of high efficiency and programming flexibility...
The performance of traditional TCP congestion control protocol degrades when congestion and contention increase in ad hoc networks that use the IEEE 802.11 DCF. Many of the problems result from medium contention at the media access control (MAC) layer. In this paper, we present a new contention-based congestion control (CBCC) method according to a novel congestion information from MAC layer. This...
This paper presents a new adaptive filtering algorithm for image enhancement basing on several image enhancement algorithms, under α stable impulsive noise. The algorithm defines a new fractional lower order moment to adjust the weight of adaptive filter. It has a better robustness to impulsive noise. Simulation results show that the new algorithm is more effective to restrain spike noise under proper...
Nowadays, Quadrotor helicopters are becoming very popular platform for unmanned aerial vehicle (UAV) research, due to their capability of hovering, vertical takeoff and landing (VTOL) and simplicity of their design and maintenance. To date, the control of most Quadrotor aerial robots have been based on their dynamical models, but in this research it's been tried to control the vehicle without any...
In many real-world networks, the rates of node and link addition are time dependent. The nodes in a community within a network are much more connected to each other than to the others outside the community in the same network. A constant acceleration local-world model has been proposed to capture and describe the essential topological properties of real networks. A mean-field method has been used...
In cognitive radio networks (CRNs), different received signal-to-noise ratios (SNRs) of secondary users (SUs) lead to different reliability of their local spectrum sensing decisions, and then greatly affect sensing capability of cooperative spectrum sensing. Cooperative spectrum sensing with traditional hard decisions can not improve sensing capability efficiently due to allocating the same weight...
Automotive gateway system is necessary because several communication protocols is used and need to communicate between other. CAN bus is one of the most popular buses, and FlexRay has the unique advantages of high speed, large bandwidth and reliability. In this paper, a gateway for CAN and FlexRay in automotive has been proposed. The gateway can convert data between CAN and FlexRay protocols that...
Visual tracking is the act of consistently locating a desired feature in each image of a given input sequence and it is typically complicated by several factors such as noise of sensors, motion in the scene, motion on the part of the observer and real-time constraints. In this paper, a novel visual tracking approach is proposed by jointly using mean shift and IMM, which can effectively deal with the...
This paper concerns the problem of the wide filed-of-view on intelligent video surveillance system and presents an image mosaics solution based on scale invariant feature transform (SIFT) algorithm to get the wider view. Image mosaics contain mainly two parts: image registration and image fusion. The SIFT algorithm is improved to meet the requirements of the intelligent video surveillance system,...
Afire control system with space virtual feedback (SVF) is presented. The whole tracking systems is close-looped by the space virtual feedback line which is the line of sight (LOS). But the parts in the system, such as tracking subsystem and servo subsystem, run in the state of open-loop. Because the SVF tracking method is used in the system, the corrector can be removed in this system architecture...
Prior work has shown entropy-based DDOS detection is suitable for detecting low-rate DOS. A key challenge in this approach is to determine the most suitable threshold for detecting DDOS attacks accurately. To address this challenge, we propose an advanced entropy-based (AEB) scheme, which divides variable rate DDOS attacks into different fields and treats each field with different methods. Compared...
In this paper we propose a design of an Autonomous Underwater Vehicle that can perform some primary functions and can be of great relevance to numerous underwater predicaments for the researchers. We are focussing on fields like Vehicle Hydrodynamics, Underwater Propulsion, Underwater Sensing, Mechanical Systems, Underwater Acoustics and Power Systems. Formulating our design on all the above characteristics...
In order to improve delivery ratio and reduce average delay and network cost in Delay and disruption Tolerant Network (DTN), This paper puts forward a domain based single copy routing algorithm (DBR) for BirdNet, which is a special DTN based on mobile sensor nodes installed on birds with GPS function enabled. In this algorithm, the GPS position information from the bird is used, to assign the mobile...
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