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.
The Cardiovascular system (CVS) consists of the heart and blood vessels. The activities of heart and lung are responsible for pumping and return path of the blood through a closed circuit of elastic vessels. Time-frequency analysis of signals derived from blood flow revealed the existence of five almost periodic frequency components having average frequencies of 1.0, 0.2, 0.1, 0.03 and 0.01Hz due...
Deep Neural Networks have become increasingly popular due to their efficient realization in GPU hardware. Problems that were once considered computationally intensive to implement using Neural networks have now become possible due to the vast amount of flexibility and capability offered by the GPU and Deep networks combination. In this work, we attempt to improve the recognition rate for images, using...
Resourcesat-2A is an imaging remote sensing satellite carrying three payloads namely Linear Self Scanning Sensor-4(LISS-4), Linear Self Scanning Sensor-3 (LISS-3) and Advanced Wide Field Sensor (AWiFS). LISS-4 is a high resolution multi-band camera. The Payload Electronics (PLE) and Baseband Data Handling System (BDH) handle multiple clocks and high bit rate data. BDH is accommodated on main platform...
This paper brings out the technique employed to mitigate the spurious noise seen riding on the telemetry parameter signals from subsystems, in particular Wheel Drive Electronics (WDE). WDEs are used for speed control of Reaction Wheels (RW). Four numbers of Reaction Wheels are mounted in tetrahedral configuration in the spacecraft. The combined vector of all the wheels obtained by varying wheel speeds...
In this paper, we aim to present a surface potential based model for GaN High Electron Mobility Transistors. The analytical model is computationally efficient and can be accurately used for DC and RF predictions. It includes various effects of velocity saturation, access region resistance, temperature, gate current and noise.
In this paper, two characterization approaches for electrical noise and stability in microwave amplifiers operating in large-signal regimes are reviewed. The first technique concerns the experimental determination of amplifier stability margins through pole-zero analysis of measured closed-loop frequency responses. The second technique deals with the measurement of AM and PM amplifier noise in non-linear...
This paper examines a schema for graph-theoretic clustering using node-based resilience measures. Node-based resilience measures optimize an objective based on a critical set of nodes whose removal causes some severity of disconnection in the network. Beyond presenting a general framework for the usage of node based resilience measures for variations of clustering problems, we emphasize the unique...
In this paper we will discuss the CMOS circuit design strategies and main results for an all-CMOS MEMS based oscillator in order to reduce the oscillator far-to-carrier noise (which is limited by the circuit noise) and the close-to-carrier noise (which is limited by both the amplifier phase noise and the MEMS quality factor). The feasibility of using the Via layer of a commercial CMOS technology to...
The growing demand for robust speech processing applications able to operate in adverse scenarios calls for new evaluation protocols and datasets beyond artificial laboratory conditions. The characteristics of real data for a given scenario are rarely discussed in the literature. As a result, methods are often tested based on the author expertise and not always in scenarios with actual practical value...
In this paper a review of current research, design and development of an Ontological Cognitive Radio (OCR) which uses Stochastically Resonant Spectrum Sensing (SRSS) and Interference Management (IM) to facilitate, expedite and optimize TV White Space is provided. We discuss the OCR basis and address IM aspects briefly, and, discuss and demonstrate the Stochastic Resonance (SR) effect using additive...
This paper proposes a programmable Low Pass Filter (LPF) to improve the performance of sensorless stator flux orientation control for induction motors. Commonly, a pure integrator based on the voltage model is used to estimate stator flux linkages for its simplicity. However, due to noise errors such as strong Gaussian noise variance, a drift and a dc offset are easily produced by the integrator when...
Superpixel algorithm aims to semantically group neighboring pixels into a coherent region. It could significantly boost the performance of the subsequent vision processing task such as image segmentation. Recently, the work simple linear iterative clustering (SLIC) [1] has drawn huge attention for its state-of-the-art segmentation performance and high computational efficiency. However, the performance...
As a densely populated city-state, the concern of noise pollution control yearly increases in Singapore. It is well known that high sound pressure levels contribute heavily to general annoyance, but it is not the sole factor. To facilitate the creation of noise control policies, it is desirable to systematically measure the annoyance level of noise from the typical Singapore urban environment by conducting...
The inter-carrier interference (ICI) caused by Doppler spread in mobile channels affects the OFDM orthogonality. This paper presents a comparative study of the performance of different low complexity methods to estimate the ICI power present in mobile reception. In addition, a new method based on experimental results is proposed. Several computer simulations based on OFDM systems with Log-likelihood...
This paper proposes a neural network (NN) based noise prediction model for electric machines, applied to the case of synchronous reluctance motors (SynRMs). The natural frequencies of various vibration modes for a SynRM stator with generalized tooth geometry and slot numbers have been obtained using structural FEA based computations and then used to build a NN based surrogate model. The accuracy of...
In the ordinary saturable magnetically controlled reactors inserted in the legs with magnetic valves of smaller cross-sectional areas (VMCR), the flux concentrates in the legs due to the valves so the iron loss and noise are increased. In this paper, to reduce the iron loss and noise of VMCR, the structure of the valves is improved by using 3D nonlinear magnetostatic field analysis taking account...
The role of chemical sensors in modern process industry cannot be overestimated, since they are encountered at different stages of process control, helping maintain product quality and at the same time allowing to keep an eye on environmental issues and pollution problems. Numerous device families are currently in use, where optical chemical sensors are probably the fastest, the simplest and the most...
Compared with electromagnetic current transducer and electronic current transducer, fiber optic current transducer (FOCT) represents the developing direction of current transducer, which has a series of advantages, such as wide bandwidth, good insulation performance, high measuring accuracy, and so on. FOCT is one kind of new-type precise sensor based on the principle of Faraday magneto-optical phase...
An 850-nm VCSEL carried 16-QAM OFDM transmission at 56 Gbit/s is demonstrated by using the pre-leveling technology, which reveals an optimized signal-to-noise ratio, error vector magnitude and bit-error-rate of 16.4 dB, 15.1% and 1.2×10−3, respectively.
Cochlear implants are prosthetic devices used to provide hearing to people who would otherwise be profoundly deaf. The deliberate addition of noise to the electrode signals can in principle increase the amount of information transmitted via an effect termed suprathreshold stochastic resonance (SSR). However, for SSR to occur the noise must be added in such a way so as to achieve, at least partial,...
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.