Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Inter-Component Communication (ICC) enables useful interactions between mobile apps. However, misuse of ICC exposes users to serious threats, allowing malicious apps to access privileged user data via another app. Unfortunately, existing ICC analyses are largely insufficient in both accuracy and scalability. Most approaches rely on single-app ICC analysis which results in inaccurate and excessive...
Deep visual attention in computer vision has attracted much attention over the past years, which achieves great contributions especially in image classification, image caption and action recognition. However, due to taking BP training wholly or partially, they can not show the true power of attention in computational efficiency and focusing accuracy. Our intuition is that attention mechanism should...
Recently, rateless codes make a remarkable progress on achieving maximum network performance without incurring CSI feedback overhead, under dynamic contexts with time-varying channels. However, existing rateless codes are only optimal for single-carrier channels, but are far from optimal for multi-subcarrier OFDM channels that are dominantly adopted in modern high-speed wireless networks. In this...
Supersonic vapor condensation of moist gas through a nozzle is very complicated and will influence the measurement accuracy of sonic nozzle seriously. The sufficient experimental data are essential to conduct the deep-going research. To achieve that, a multi-parameter adjustable humidification apparatus was set up. An optimal temperature control module, a high pressure micro-fog generator and an evaporator...
This paper proposes a novel distributed multi-target fusion mechanism based on average marginal density (AMD) via the generalized Covariance Intersection (G-CI) fusion algorithm. There exist several drawbacks in traditional multi-sensor tracking methods, e.g. track association is sensitive to the parameter; tracks fusion can not fuse multiple tracks jointly and traditional distributed fusion methods...
A linear-time algorithm termed SPARse Truncated Amplitude flow (SPARTA) is developed for the phase retrieval (PR) of sparse signals. Upon formulating the sparse PR as a non-convex empirical loss minimization task, SPARTA emerges as an iterative solver consisting of two components: s1) a sparse orthogonality-promoting initialization leveraging support recovery and principal component analysis; and,...
Synchronization plays an important role in wireless communication systems when tracking a phase-shift keying (PSK) signal, especially when the initial frequency error is comparable to the loop bandwidth. In order to improve frequency acquisition, an automatic frequency control (AFC) augmentation is used. This paper presents a composite AFC/Costas loop by combining both the AFC loop with a phase-locked...
Radio frequency interference (RFI) is ubiquitous in wireless communications which could greatly degrade communication system performances in an open environment. For satellite communications (SATCOM), the system performances degradation could be even worse considering the large round trip time (RTT) delay. To mitigate RFI effects, cognitive radio with adaptive waveform configurations could be effective...
This paper considers the blind estimation of the carrier frequency offset (CFO) and sample frequency offset (SFO) in orthogonal frequency division multiplexing (OFDM) system. Conventional methods require periodically transmitted pilot tones in frequency domain or identical training symbols in preamble. To achieve a blind estimation scheme, a joint maximum-likelihood (ML) estimator is proposed by applying...
In this paper, a Stackelberg game based power control framework is proposed for interference coordination among device-to-device (D2D) communications and spectrum-sharing cellular networks. The cross-tier interference from D2D communications is controlled by the cellular base station (CBS) through setting a price for the shared subchannels. Based on the cross-tier interference price, each D2D pair...
The MOEA/D-DE (multi-objective evolutionary algorithm based on decomposition combined with differential evolution) is firstly applied to design a high-sensitivity RFID sensor tag with the consideration of its communication performance. For demonstration, an RFID temperature sensor tag is designed and tested. Both simulated and measured results show the designed sensor tag achieves a three times higher...
The use of directional antennas in wireless networks has received growing attention because of its high spatial reuse and high antenna gains. The Medium Access Control(MAC) protocol with directional antennas is nontrivial due to the limitations in wireless environment. The existing protocols commonly assume that the nodes can operate in both directional and omni-directional modes. In this paper, we...
Classical approaches to the 3D thermal simulation of electronic systems require assumptions regarding the amount of power dissipated and its distribution. Errors in such assumptions are a leading cause of resulting errors in temperature rise predictions. Although 3D electro-thermal simulations can be applied; where electrical boundary conditions are specified and current density, electrical potential...
The paper presents an efficient parallel timing synchronization algorithm structure, which is suitable for high speed communications demodulation system and easy to implement on FPGA platform. First, a new parallel timing synchronization structure is displayed. Wherein the proposed parallel structure make up of a feedback loop based on the farrow interpolation filter, Gardner algorithm and the numerically...
This paper mainly presented a system which can make a prediction to the distribution transformer's load status in smart grid. Since the operation of distribution transformer's load status is generally in the post processing stage at the current stage, lacking forecasting work on distribution transformer's operation and load status. Given the issues above, to reduce costs, ensure the security of power...
Light signal recognition is one of the key issues in autonomous vehicle. Unlike normal object detection and recognition, which can be done by using different sensors, light signal recognition is naturally a computer vision problem. Although commercialized ADAS (Advanced Driving Assistance System) products, such as mobileye, could be used for rear-end collision warning, a cost-effective approach is...
Due to asynchronous packet transmissions and rate mismatch among different coding flows in existing opportunistic network coding architectures, such as COPE, the amount of packets which can be coded together may be insufficient and thus the performance gain of network coding cannot be fully exploited. One feasible solution for this problem is to make coding nodepurposely delay some packet transmissions...
Power system state estimation (PSSE) is a critical task for grid operation efficiency and system stability. Physical laws dictate quadratic relationships between observable quantities and voltage state variables, hence rendering the PSSE problem nonconvex and NP-hard. Existing SE solvers largely rely on iterative optimization methods or semidefinite relaxation (SDR) techniques. Even when based on...
Decision making is an important component in a speaker verification system. For the conventional GMM-UBM architecture, the decision is usually conducted based on the log likelihood ratio of the test utterance against the GMM of the claimed speaker and the UBM. This single-score decision is simple but tends to be sensitive to the complex variations in speech signals (e.g. text content, channel, speaking...
The latest High Efficiency Video Coding (HEVC) standard offers higher performance than existing video coding standards - up to 50% bit-rate reduction at the equal perceptual quality, but with a significant encoder complexity increase. With regard to intra prediction, a set of 35 intra prediction modes is defined in HEVC to enhance the intra coding performance. However, the high complexity makes it...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.