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 presents an integrated modelling method for submarine hovering system which equipped ballast tank to adjust vehicle position and altitude. Ballast system model including high pressure bottle and ballast tank is made first of all, and then the disturbance force considering compressibility and sea environment. Discharged coefficient of orifice is taken into account, and necessary linearity...
This study proposes an i-Vector based approach to gender identification. Gender-labeled utterances from the Fisher English (FE) corpus are used to formulate an i-Vector extraction framework, and a Probabilistic Linear Discriminant Analysis (PLDA) back-end is employed to compute the scores for gender identification. A novel duration mismatch compensation strategy is also presented that offers very...
With the rapid development of clustering analysis technology, there have been many application-specific clustering algorithms, such as text clustering. K-Means algorithm, as one of the classic algorithms of clustering algorithms, and a textual document clustering algorithms commonly used in the analysis process, is widely used because of its simple and low complexity. This article in view of two big...
With the continuous development of network and database technology, share and conversion on heterogeneous data are still a complex problem currently facing. Current methods are mostly based on the similarity between the field to complete the matching process, although this method can finish partial matches on information, its time complexity is very high due to the large processing data sets and the...
We report on the design consideration and experimental results of a wideband Ka-band heterodyne receiver with high gain flatness and slight group delay fluctuation. Flat gain performance is achieved by applying amplitude equalizers both in RF circuits and IF circuits. Small group delay fluctuation is fulfilled by making a trade-off between out-of-band rejection and group delay when designing the RF...
A power equalization scheme has been proposed for non-degenerate cascaded phase-sensitive fiber-optic parametric amplifier (PS-FOPA) based on dispersion compensation fiber (DCF). The DCF is inserted between the phase-insensitive amplification segment and phase-sensitive amplification segment, and compensates the dispersion resulting from single-mode fiber that acts the wavelength-dependent phase shifter,...
On the foundation of policy research and semantic analysis of documents, we put forward a mining method of effective latent policy lineage relationship. We apply the factor space theory to policy research and propose a concept-factor decomposition method. With the combine concepts, we put forward the generic extraction method to mine latent genes. Finally, we conduct an experimental verification on...
According to the postulated "response to injury theory" of atherosclerosis, atherosclerosis develops as a result of repetitive injury and ongoing inflammatory process of the inner arterial wall (endothelial layer) of large and medium-size arteries. Many previous studies results show that the interaction of ultrasound with microbubbles in small vessel could cause endothelial cell dysfunction...
A distributed satellite network (DSN) is a cluster of independent satellite that networking wirelessly to response user demands. This new paradigm of space system poses several challenges in both design and implementation because the resources are distributed among the network with unstable topology and communication links. In this paper, we propose the cooperation architecture for DSN to realize...
Aiming for the denoising problem for infrared image, a novel algorithm is presented based on mixed statistical model in nonsubsampled contourlet domain. The noise coefficients which affect infrared image quality are generally considered to obey Gaussian distribution in nonsubsampled contourlet transform domain. At the same time, the original signal coefficients have the features of sharper peak at...
This paper solves the TSP (Travel Salesman Problem) problem using the improved ant colony algorithm, and discusses the influence of several key parameters of ant colony algorithm on the performance of the algorithm. Meanwhile computer simulation is carried out on a large number of data using MATLAB, and the regulation of setting parameters is found by experiments on lots of data. The experiments show...
Rapid advancement of sensing and information technology brings the big data, which presents a gold mine of the 21st century. However, big data also brings significant challenges for data-driven decision making. In particular, it is not uncommon that a large number of variables (or features) underlie the big data. Complex interdependence structures among variables challenge the traditional framework...
From 2003 to 2010, in the due process of carrying out the Project of “The Remote Sensing Survey and Monitoring on National Entironmental and Geological Backgrounds”, the National Entironmental and Geological Information System for Remote Sensing Survey and Monitoring (Known as “NEGISRSSM”) was established to meet the demand of result data management and application. The System consists of 11 functional...
This paper presents frequency doublers with high output power for millimeter-wave applications. The circuits are fabricated using a 45nm SOI CMOS technology. A new circuit topology, combining a push-push doubler core with a cascaded stacked amplifier, has been implemented to increase the output power. The first doubler delivers 10.2 dBm peak power at 100 GHz output, with a 3-dB bandwidth from 88 to...
A 0.28THz backward-wave oscillator (BWO) driven by sheet beam is proposed based on the discrete metallic poles planar slow wave structure (SWS). It is a great potential to design THz vacuum devices based on the discrete poles structure with a relatively low operating current density.
The presence of Lombard Effect in speech is proven to have severe effects on the performance of speech systems, especially speaker recognition. Varying kinds of Lombard speech are produced by speakers under influence of varying noise types [1]. This study proposes a high-accuracy classifier using deep neural networks for detecting various kinds of Lombard speech against neutral speech, independent...
This A novel 3-channel single-longitudinal-mode (SLM) tunable erbium-doped fiber laser with sub-ring cavities based on a digital Opto-digital-micro-mirror device (Opto-DMD) processor is proposed and experimentally demonstrated. 3-channel tunable SLM lasing were obtained simultaneously by means of the Opto-DMD processor without any mechanically shift, which is the unique feature and innovative point...
This paper presents a novel active load-current-sharing control of paralleled or interleaved isolated series-resonant converters. In the proposed control method, the output voltage is regulated by variable-frequency control of the converters' primary switches, while a delay-time control is used to control secondary-side switches provided in place of diode rectifiers to correct load-current imbalance...
In this paper, a control method that improves performance of series-resonant converters that operate with a wide input-voltage and/or output-voltage range by substantially reducing their switching-frequency range. The switching-frequency-range reduction is achieved by controlling the output voltage with a combination of variable-frequency and delay-time control. Variable-frequency control is employed...
It has been understood the large drawback of a CLLC bidirectional serious resonant converter is using three magnetic components, i.e., the transformer and two resonant inductors. In this paper, an integrated magnetic transformer for simplifying and boosting the electrical vehicle (EV) and plug-in electrical vehicle (PHEV) on board charger module (OBCM) implementation and performance of a bidirectional...
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.