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VoIP implementations are nowadays the preferred information technology alternative to public switched telephone networks. With dependence on this technology, VoIP quality and performance are critical. In this paper, we implement some commonly used VoIP CODECs on Windows desktop operating systems to evaluate their performance on two versions on IP, namely IPv4 and IPv6. Performance related metrics...
Sensor networks are consisting of sensor nodes with limited battery power and wireless communication modules on it. They are deployed to collect the useful information from the field. Topology control is very critical to operate the sensor network for a long period of time. When being deployed, ad-hoc and sensor networks are unstructured and lack an efficient and reliable communication scheme. For...
The control system of scanning motor is studied. The method to control the scanning motor with a single neuron self-adaptive PID controller to counter the disadvantage of analogue PID controller is discussed. The structure of control system and the method about how to implement the single neuron self-adaptive PID controller is designed. The simulation experiment results show that it not only satisfies...
Sensor node localization is a basic and key problem in sensor network work and management, and the self-localization of the sensor node is the basis for sensor network applications. This paper classifies and compares with several localization algorithms currently used, presents a node localization algorithm based on mobile anchor node, to reduce the communications and computing cost of the wireless...
Based on the image edges non-changing characteristic in image format transformation, a new digital watermarking algorithm for huge index image is proposed. The watermarking information was embedded in edges by adjusting the edge pixels; therefore, the algorithm is robust against the lossless image format transformation. The experimental results show that the proposed algorithm has perfect Robustness...
In this paper, by analyzing the deficiency and insufficient of subjects-selection in traditional graduate design, put forward to reform the process of subjects-selection in graduate thesis by application of web, propose an constructive programs of bidirectional subjects-selection system for graduation thesis. Bidirectional subjects-selection system for graduation thesis emphasizes the students-centered...
Spectrum sensing is one of the most basic issues in cognitive radio (CR), upon which the other operations to increase the spectrum utilization could be carried out. Therefore, an accurate, reliable and real-time method to detect the unused spectrum and available bands is required urgently. To fulfill the needs, several schemes have been introduced, among which the multitaper method (MTM) for nonparametric...
In this paper, a robust design method of optimization is used in the swing block four-bar linkage design by optimizing the robustness of both the system objective function and constraint functions. Comparing the solution of the traditional optimization and the solution of the robust optimal design, the robust design parameter displays a significant stability in performance when the value of the crank...
Rapid growth in sharing information using internet technologies laid the threats of copyright protection for digital multimedia contents. One of the remedy for intellectual property protection is Watermarking. This paper deals with numerous available digital video watermarking techniques and raised the issue of quality and size of watermarked video. Through experimental study, it has been shown that...
Some registration approaches can fail when percentage of outliers is too high in remote images. We introduce, in this paper, a new approach to improve the robustness of feature extration for automatic image registration. This method is based on long-edge correlation and consistency check. Long-edge correlation extracts a long edge as reference curve in order to increase the percentage of common feature...
A new method integrating reduced model and mixed design variables is proposed and applied in the lightweight design of a bus skeleton for the purpose of mass reduction without loss in structural performance. A whole skeleton model and a reduced model are built. All parts except chassis and floor assembly are reduced out using static reduction method. Reduced model is verified with finite element analysis...
Despite many of the same properties between standard median filter (SM) and Pseudo-median filter (PM), SM can remove impulses completely but PM not. However, PM can be more efficiently calculated which is very important for processing data online in WSN. In order to synthesize the advantages of performance of PM and SM, an improved method combined the advances of PM and SM is proposed in this paper...
Detecting a high-quality moving object with good robustness in computer vision system has important significance for follow-up task. Researching on the traditional algorithm, this paper proposes a background reconstruction algorithm based on a modified k-means clustering and the Single Gaussian model which could provide an accurate background image through a sequence of scene images with foreground...
This paper presents a novel approach for embedding a binary watermark into video frames based on the temporal difference and discrete wavelet transform (DWT). We embed a binary watermark in the most activity region which is obtained by the temporal difference in the approximate band at the first level of discrete wavelet transform (DWT) decomposition of video frames. Experimental results demonstrate...
In this paper, an efficient watermarking algorithm for color image is proposed based on HSI color space and Discrete Wavelet Transform (DWT). The color image is firstly converted from RGB to HSI format to obtain the intensity component. Then sub-blocks of intensity are divided and sorted according to the human visual system (HVS) characteristic. Finally, the scrambled binary watermark, which is achieved...
In the future, in e-commerce, the main actors will be the intelligent agents, who will dramatically reduce online shopping by human factors because of their reactive, proactive and social characteristics. Internet technology nowadays determines us to be less prepared to control and sanction the increasing number of users and of those service providers who have a doubtful behavior. The model developed...
In this paper, a novel algorithm called Receding Horizon Kalman Particle Filter (RHKPF) has been proposed and is applied to our improved fingerprint-based WLAN vehicle positioning system. The RHKPF is a particle filter that the optimal importance density is approximated by incorporating the most current measurement through a Receding Horizon Kalman Filter (RHKF), for that the RHKF is believed to be...
This paper analyzes the basic method of digital video image processing, studies the vehicle license plate recognition system based on image processing in intelligent transport system, presents a character recognition approach based on neural network perceptron to solve the vehicle license plate recognition in real-time traffic flow. Experimental results show that the approach can achieve better positioning...
In this paper, a novel fuzzy support vector machine based image watermarking scheme is proposed.Since the application of support vector machine in the process of watermarking technology is only a simple classification of the image. However,the fuzzy support vector machines by selecting the appropriate degree of membership to reflect the different importance of the different sample points. In this...
An improved monocular vision method is studied for intelligent vehicle to detect the preceding car in the structural road environment. Through identifying the edges of the car, the object is detected; the false object is eliminated and the eligible object expressed as a 2-D model is acquired. Then the location of object in the next frame is predicted by Kalman filter, and the object is detected near...
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