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.
This paper proposes a novel ensemble method to improve the performance of binary classification. The proposed method is a non-linear combination of base models and an application of adaptive selection of the most suitable model for each data instance. Ensemble methods, an important type of machine learning technique, have drawn a lot of attention in both academic research and practical applications,...
A coprime array enables an increased number of degrees-of-freedom by deriving a non-uniform virtual array. However, existing work such as spatial smoothing fails to utilize all of the information provided by the coprime array, which results in performance loss. In this paper, we propose a novel coprime virtual array interpolation-based direction- of-arrival (DOA) estimation algorithm by Toeplitz matrix...
A reduction is a parallel programming mechanism for combining two or more elements into one. Many parallel programming languages, tools and frameworks (e.g., OpenMP, MPI, etc.) directly support simple forms of reductions (e.g., building a total sum out of partial sums). Some of those tools and frameworks allow more complex reductions to be implemented as custom reductions. However, the success of...
A novel broad beamwidth patch antenna with a dimension of 80mm60mml.6mm is presented in this paper. It consists of a magnetic dipole, a electric dipole and a ground. The measured 10-dB impedance bandwidth is 5.72–5.96GHz (relatively bandwidth of 4.1%). Over the working band, the E-plane 3-dB beamwidth is as large as with respect to the normal direction. The cross polarization suppression level is...
The event-driven programming pattern is pervasive in a wide range of modern software applications. Unfortunately, it is not easy to achieve good performance and responsiveness when developing event-driven applications. Traditional approaches require a great amount of programmer effort to restructure and refactor code, to achieve the performance speedup from parallelism and asynchronization. Not only...
In this paper, a novel symmetric weighted thinned array with pattern reconfigurable antenna is proposed to achieve wide-angle scanning performance. By properly selecting the weighted function, excitation and states of each element, the array can scan its main beam form −77° to +77° with respect to broadside with side lobe level (SLL) almost −10dB below the maximum when scanning to the wide angle....
VANET (Vehicular ad hoc Network) is a special kind of ad hoc wireless network where every single node is a vehicle moving in a relatively high velocity, which leads to exclusive challenges like rapid changing topologies, safety and privacy concerns. In this specific network, broadcasts tend to be carrying important messages such as car accident notification, disaster alert or extreme traffic condition...
VANET (Vehicular ad hoc Network) is a special kind of ad hoc wireless network where every single node is a vehicle moving in a relatively high velocity, which leads to exclusive challenges like rapid changing topologies, safety and privacy concerns. In this specific network, the propagation of emergency messages could be critical to save human lives and property. Many researchers have proposed routing...
A novel and blind detection scheme for the asymmetric Paired Carrier Multiple Access (PCMA) satellite communication system is proposed in the paper. Recently, the asymmetric application mode of PCMA, which is efficient and pragmatic in the VSAT network, has been studied with great interest. In our research, the symbol interference cancellation and Forward Error Correction (FEC) coding are introduced...
This paper investigates exponential stabilization of a dual-rate linear control system using a switched system approach. Taking into consideration different sampling periods of various sensors, the state variables of the linear system are classified as two categories and each category is paired with a sampling period. Based on whether the sampling information about two categories of state variables...
Degradation of waste PET is an important issue nowadays. Microwave-assisted degradation of waste PET in alcohol was carried out utilizing silicon carbide (SiC) as power modulators. Even at atmospheric pressure, reaction time could be shortened from several hours to 30 min, and the degradation rate was increased by 12%. PET degradation efficiency at atmospheric pressure was up to 96% with amount of...
We propose a new transform speech codec that jointly encodes a wideband waveform and its corresponding wideband and narrowband speech recognition features. For distributed speech recognition, wideband features are compressed and transmitted as side information. The waveform is then encoded in a manner that exploits the information already captured by the speech features. Narrowband speech acoustic...
In this paper, the problem of stochastic sampling control for a class of nonlinear continuous-time systems is investigated. For the simplicity of calculation, only two different sampling periods are considered whose occurrence probabilities are given constants and satisfy Bernoulli distribution, which can be further extended to the case with multiple stochastic sampling periods. By using the input...
Whisper is an alternative speech production mode from neutral speech, which is used by talkers intentionally in natural conversational scenarios to protect personal privacy and avoid being overheard. Due to differences between whispered and neutral speech in vocal excitation and vocal tract function, the performance of speaker ID systems trained with neutral speech degrades significantly. In this...
The tubular pump device model including rotor, stator and inlet and outlet passages was simulated based on SIMPLEC arithmetic and standard k-?? RNG turbulence model. The match of rotor and stator in tubular pump was optimized. The numerical results show that the device model has a steady flow field and high efficiency when the distance between rotor and stator is 0.11D2. With the distance increasing...
Much research recently in speaker recognition has been devoted to robustness due to microphone and channel effects. However, changes in vocal effort, especially whispered speech, present significant challenges in maintaining system performance. Due to the absence of any periodic excitation in whisper, the spectral structure in whisper and neutral speech will differ. Therefore, performance of speaker...
Traditional classification methods, such as neural network approaches, have suffered difficulties with generalization and producing models. Support vector machine (SVM) approach is considered a good candidate because of its high generalization performance without the need to add a priori knowledge, even when the dimension of the input space is very high. In this paper, SVM approach is proposed to...
In this paper, we contribute with an approach to support guaranteed real-time services over standard switched Ethernet without additional hardware or software modification of the switch and the underlying standard. In our proposal, the traffic differentiation mechanism introduced by the IEEE 802.1D/Q standard and the standard hardware-implemented first come first served (FCFS) priority queuing are...
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.