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.
Heterostructures of carbon nanotube on graphene, CNT-graphene, with two graphene layers connected by a CNT normal to the graphene planes, are investigated using first-principle calculations, leading to computed density of states (DOS) and electron transmission spectra. Based on these results, the structure consisting of graphene and a (4,4) CNT is determined to be metallic while that of graphene and...
Two-phase microchannel cooling has demonstrated substantial performance enhancement for thermal management of high-power electronics, offering remarkable heat removal capability without imposing high pumping power penalties. However, similar to other bulk cooling methods, this method alone too has difficulty in addressing remediation of local hotspots. Thermoelectric coolers, on the other hand, are...
The performance of smoothness-enforced Bayesian PET image reconstruction is strongly affected by the weight on regularization. Compromises need to be made between variance and spatial resolution. In this work, we propose to use an artificial neural network (ANN) to fuse the image versions reconstructed from a maximum a posteriori (MAP) algorithm with different regularizing weights for quantitative...
Although Automatic License Plate Recognition (ALPR) systems have achieved high recognition speed and efficiency, perspective distortion may still affect the accuracy and reliability of ALPR due to the uncertainty of camera shooting angle. Some existing license plate correction methods are computational expensive and low robust. We proposed a perspective correction method based on the bounding rectangle...
Existing decision-level information fusion methods for weak electrophysiological signals detection cannot effectively integrate conflicting information. Meanwhile, data-level information fusion methods lose physiological significance of channels. In this study, the evidence on each channel with a soft-decision method is first proposed. Then, a general multi-channel flexible information fusion detection...
Significant wave height (SWH) is one of the major ocean altimetry products. This paper proposes a fast algorithm in retrieving the SWH from altimeter waveform. The idea is to differentiate the echo waveform and acquire a Gaussian-shape waveform. Then the standard deviation of the Gaussian function is computed directly and the standard deviation of the scatter probability density function (hence, SWH)...
Dynamic myocardial perfusion (MP) PET imaging followed by tracer kinetic modeling provides quantitative measurement of myocardial blood flow (MBF). The purpose of this study is to incorporate anatomical information in the 4D direct parametric image reconstruction and to evaluate the performance in detecting regional MBF abnormality. The one-tissue compartment model was formulated in the maximum likelihood...
Business process reengineering frequently occurs in complex service systems because of its dynamic, random and varied running characteristics. To solve the problem, we proposed a novel SOA portfolio optimization algorithm based on value model and graph theory. Firstly, in order to strengthen the QoS analytical capacity of SOA, the value model is introduced into the SOA system to describe customer's...
This paper is concerned with the theoretical model for SAR altimeter or Delay-Doppler radar altimeter. Work with this aim, first, the data process of the SAR altimeter is introduced and some assumptions of SAR altimeter systems are introduced. And this result in that the mean echo model of SAR altimeter could expressed as three terms convolution as that of conventional radar altimeter. Second, the...
The electroencephalogram (EEG) signal is highly weak and usually contaminated by electrooculogram (EOG), this presents serious problems for EEG data interpretation and analysis. So, the automatic removal of EOG artifacts from EEG has been an important problem. In this paper, Hilbert-Huang transform (HHT) is applied to remove the EOG artifacts arising from eye movement. According to the local time-frequency...
Reasonable channel assignment is one of the key research contents of the multi-channel assignment algorithms. A distributed channel assignment method based on partition of interface function was proposed in this paper. Different channel assigning or switching algorithms for interfaces with different function were used: Channel assigning algorithm based on measuring time to gateway was used for station...
Text clustering is an automatic technique to group texts using the approach of feature extraction and term connection to calculate the similarities among subject contents of texts. Since the properties of terms in Chinese text (e.g. segmentation and annotation) are not as clear as the other languages, extracting and distinguishing features from Chinese text is therefore much more difficult, which...
Distributed hash tables (DHTs) provide a scalable solution for data sharing in P2P systems. To achieve fault tolerance and ensure high data availability, DHTs typically rely on data replication. However, nodes churn, lacking of global view and existence of malicious nodes in P2P environment bring new challenges to the concurrency control for replicated data. Agreement-based algorithms require all-to-all...
In wireless mesh networks (WMN), most flows are destinated to Internet. The IEEE 802.11s standard does not consider the flow characterization of WMN. Employing the mechanism may cause some scalable issues. SWMN, a new scalable architecture for WMN is proposed, which consists two components, one is mesh backbone, the other is mesh domain. To form this architecture, two metrics "radio metric"...
In grid market, there is an information asymmetry problem between resource providers and users. In former approaches, users forecast resources' reliabilities to select resources based on historical feedbacks. Whether the feedbacks are credible is not inconsideration. An approach for resource selection is proposed that inspirits truthful feedback and estimates resource providers' reputation value,...
As a generalization of non-commutative fuzzy logic algebras - pseudo-BL algebra, the notion of pseudo-hoop was introduced by G.Georgescu, L.Leustean and V.Preoteasa. In this paper, the filter theory of pseudo-hoop is further investigated. The prime filter theorem of basic pseudo-hoop is proved. Moreover, the notion of well basic pseudo-hoop is introduced, and its normal prime filter theorem is proved.
The P2P system is an anonymous and dynamic system, thus, some malicious behaviour can't be punished. In order to restrict the malicious behaviour in the P2P system, researchers have focused on establishing effective reputation systems. However, the present reputation system can't avoid the trick of the false reputation feedback. We propose a distributed trust-based reputation model in p2p system (TBRM)...
Cooling hot-spots with high heat flux (e.g., >1000W/cm2 ) is becoming one of the most important technical challenge facing today's IC industry. More aggressive thermal solutions, than would be required for uniform heating, are highly desired. Solid state thermoelectric coolers (TECs) have received recent attention for hot-spot thermal management. However, present day TECs typically have cooling...
We designed and fabricated a three-dimensional (3D) silicon microrefrigerator, which demonstrates a cooling power density over 200W/cm with only ~1degC cooling. The high cooling power density is mainly due to the high thermal conductivity and heat spreading effects. These devices have potential application in hot-spots management to reduce the chip peak temperature and realize on chip thermal management...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.