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.
Multiuser cooperation is potential to improve the network throughput and increase the intended end-to-end communication reliability. For different purposes, the cooperative node has two selections: transmit its own signals or relay the intended source's message. Unlike the conventional relay selection problems, we consider a new scenario in which the receiver can perform interference cancellation...
Based on the human auditory system for spatial localization theory, we proposed a spatial localization of multiple sound sources using a spherical robot head. Space sound vectors recorded by a microphone array with spatial configuration, are used to estimate the histograms of spatial arrival time difference vectors by solving the simultaneous equations in different frequency bands. The echo avoidance...
The study of noise elimination in partial discharge (PD) on-line monitoring for transformer was carried out to early detect the latent failt of power transformer insulation. PD signal usually mixed up all kinds of noise, it was difficult to extract faint PD impulse signal from strong background noise with Fourier transform. Adaptive filtering algorithm based on wavelet packet transform was presented...
In a MMSE Ultra-WideBand(UWB) selective rake receiver, the selection of optimal subset of multipath is important for the performance of system. As the optimal solution is NP hard, the Discrete Particle Swarm Optimization Multipath Selection algorithm (DPSO-MSa) was proposed. The DPSO-MSa can get near optimal performance after certain iterations. Simulation results are presents to compare with the...
Owing to the weakness, low susceptibility to interference and uneasiness to recover of DC signals, permalloy based upon high magnetic permeability is used as a magnetic material. The change of current is transformed into that of inductance with reference to the relationships among current I , intensity H of magnetic fields, intensity B of magnetic induction, rate of magnetic conduction of material...
The modeling and kinetic simulation on a pendular telescopic coal flowing equipment are introduced in this paper based on the software Pro/E. There are five main components' modeling included the train and the railway are given through this software. Using the software, the simulated assembling is provided, and the moving relation is established about the practice working state. The reasonable drivers...
Taking the design of Electrical Nerve Stimulator for example, the application of digital design and modeling technology in the design of small-sized medical electronic instrument is described in the paper, emphasizing the research of match design for electronic components and mechanical structure identity, which aims at reducing design error and improving design efficiency.
Security issues are paramount in wireless networks even more so than in wired networks. A particularly devastating attack in wireless networks is the wormhole attack, where two or more malicious colluding nodes create a higher level virtual tunnel in the network, which is employed to transport packets between the tunnel end points. These tunnels emulate shorter links in the network in which adversary...
Tow ship noise is a typical multi-path directional interference, and the receiving response of which on towed line array is worthy of in-depth study. Firstly, the sea trial data was analyzed to summarize the tow ship noise characteristics. Then the underwater acoustic field of tow ship noise was modeled to achieve the power distribution of the noise. Finally an important result was obtained, that...
We used to crank connecting shaft neck in the center of the neck as the origin of work piece coordinate system. Through the offset of the work piece coordinate, we made use of the method of the coordinate value in keeping with the real coordinate diameter or the relative location value of the work piece center. We designed a kind of crankshaft NC dresser which consists of the Siemens servo semi-closed...
Ultrasound images are very noisy. Along with system noise, a significant noise source is the speckle phenomenon caused by interference in the viewed object. The noise of ultrasound image was always deemed as multiplicative noise, but the present multiplicative noise models are not fitting for it very well, because the noise is more complex than the simple multiplicative one. So we should consider...
Information Flow Control (IFC) is mandatory to enforce the confidentiality and the integrity of data. It is a technique implemented in recent operating systems to track the information flow in the applications and therefore detect security leakage. In this paper, we apply this technique to a component-based Framework for securing embedded systems. We demonstrate the gain the component-based architecture...
Tow ship noise is a typical directional interference for towed line array sonar, nonstationary process with several characteristic properties, such as multi-path and angle dispersion, which greatly add the difficulty to cancel or suppress the noise. Empirical Mode Decomposition (EMD) is a novel method used for processing nonlinear and nonstationary signals. Finite Intrinsic Mode Functions (IMFs) are...
The progresses and difficulties faced in the life-detection radar signal processing are introduced in the paper. First, the progresses in signal processing are shown, including obtaining the breathing and heartbeat frequency by using self-correlation process and composing the mode vector to discriminate a life by using time-spectrum analysis and singular value decomposition. Then, the difficulties...
The voltage coupled to wayside cables is a very common EMC interface in electric transportation system, that has impact on several subsystems. The choice of the calculation method and its accuracy influences the design and its optimization. Some real cases are used as an example to identify the relevant elements and to derive some general rules to guide the choice.
In this paper, we present an approach to coordinate two temporal plans, where one plan is for the achievement of a reactive goal, and thus has more priority, while the other is for the achievement of a proactive goal. As both plans have been computed independently from each other, conflicts can arise during their execution. We present a plan merging algorithm to coordinate the actions of both plans...
In this paper, a chemical reaction which was first proposed by Willamowski and Rössler is introduced. In order to improve the effect of chemical reactions, a parameter adaptive method is designed to make the chemical reaction chaotic. This adaptive control method can make the parameters converges to the expected target value and assurance the system convergent under the parameter initial values with...
Aiming at the growing phenomenon of cheating in exams using radio-technology, the paper introduces a radio anti-cheat system. It monitors the frequency band occupied by cheating signal (voice signal mostly), and then fires interfering signals in the corresponding frequency band so as to achieve the purpose of suppressing the cheating signal. The performance of interfering signals is very important...
In this paper, an efficient Decode-and-Forward (DF) relay selection scheme for interference-limited relaying networks is considered. In contrast to previously reported works, we consider multiple interferences which make the conventional relay selection schemes not suitable for interference-limited networks and propose a new relay selection scheme for DF protocol with multiple interferences. Approximate...
In view of the new feature after introducing the relay nodes (RNs) into the conventional cellular networks, a novel soft frequency reuse (SFR)-based inter-cell interference coordination (ICIC) scheme is proposed in the relay enhanced cellular networks. On the basis of original ICIC scheme for conventional cellular network, RNs in the proposed SFR scheme reuses part of neighboring cell-edge bands to...
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.