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 paper presents an approach based on gain scheduling technique for improving the transient performances of a digitally controlled DC-DC Buck Converter working over a large area of operating conditions. In order to determine optimal settings for the control parameters under different test scenarios, an adaptive mechanism based on machine learning algorithms is used. The experimental results, obtained...
The standard multivariate metrics for semiconductor product yield estimation and prediction in production processes usually assume that the parameters contributing to the yield are all normally distributed. However, the data met in production processes is not always multivariate normal. A variety of methods has been developed for multivariate non-normal data, but these usually rely on no statistical...
The paper proposes a methodology for lifetime estimation of power devices at given applications operating conditions. The active cycling of power devices requires huge testing-time, because the process cannot be accelerated. For this reason, most often, the manufacturers provide information about the lifetime of power devices only for a few specific operating conditions. Most of the current methods...
The standard metrics for integrated circuits' analysis and characterization in production processes usually assume that the process under investigation is characterized by a normal distribution. However, the data met in practice are not always normal and the yield estimates may be inaccurate. In this paper we propose estimating the yield by using a distribution fitting flow. The selected distribution...
The modern electronic systems have become very complex with a high number of potential factors that may affect the systems' behavior. Sensitivity analysis may be employed to simplify the analysis of such systems and identify the most important factors upfront. The paper introduces two new sensitivity analysis methods based on the measure of entropy, which overcome the limitation of several state-of-the-art...
On top of assessing the specification compliance, it is also important to verify the behavior and performance of the electronic components in the targeted application. This is usually achieved by jointly simulating the component and the application. There is a particular interest in finding the application yield caused by the process variation of the electronic component. The cost of the experiments...
Studies have shown that there are different types of cries depending on the newborns' need such as hunger, tiredness, discomfort and so on. Neonatologist or pediatricians can distinguish between different types of cries and can find a pattern in each type of cry. Unfortunately, this is a real problem for the parents who want to act as fast as possible to comfort the newborn. In this paper, we propose...
Accurate measurement of rotor angle in Permanent Magnet Synchronous Motor (PMSM) drive applications is important when high performances as low level torque ripples are required. If the relationship between torque ripple and angle error is known, then, further steps can be done in order to reduce the level of the ripple. Based on an analytical description of the sensor model, a relationship between...
Studies have shown that newborns are crying differently depending on their need: hunger, tiredness, discomfort, eructation, pain, and so on. Skilled persons such as pediatricians can distinguish between different types of newborn cries and consequently estimate the baby's need by using the sounds and the gestures produced by the baby. However, this is a real problem for the unskilled parents who would...
With the increasing availability of spoken documents in different languages, there is a need of systems performing automatic and unsupervised search on audio streams, containing speech, in a document retrieval scenario. We are interested in retrieving information from multilingual speech data, from spoken documents such as broadcast news, video archives or even telephone conversations. The ultimate...
Apart from fulfilling component electrical specifications, electronics needs to fit into the target application, composed of electronics components as well as mechanical parts. In complex applications such investigations can be made by simulations in which relevant application performances are checked under any allowed variation of operating conditions, design parameters and noise factors. In this...
Internet of Things represents a challenge in the automotive industry development, as it demands for innovation, integration, safety and security. These lead to highly sophisticated requirements set for the design process. The difficulty of managing natural language requirements may lead to inherent errors such as incompleteness, ambiguousness, etc. Adding formality to the requirements is recognized...
In recent years, there has been an increasing interest in developing software controlled DC-DC converters because of their fast configurability, e.g. for several supply and load values. This paper aims at exploring the stability of a DC-DC buck converter with a software control loop in the multidimensional space of control parameters. Once the stability domain is determined, it can be further used...
With information processing and retrieval of spoken documents becoming an important topic, there is a need of systems performing automatic segmentation of audio streams. Among such algorithms, spoken term discovery allows the extraction of word-like units (terms) directly from the continuous speech signal, in an unsupervised manner and without any knowledge of the language at hand. Since the performance...
This paper presents how technological progress may come to help smart homes development, namely smart caring-homes. It proposes two different software applications that have social, medical and psychological implications in the lives of people in need of special care as it is often the case for elders or people with physical impairments. These applications focus on processing the speech signal from...
We present a method for estimating the number of simultaneous speakers for direct integration with blind speech source separation algorithms. The method was developed to use single microphone recordings but is fully compatible with microphone-array approaches. Speech source separation algorithms based on independent component analysis, multiband analysis or spectral learning need the number of concurrent...
This paper focuses on the analysis of limit cycles that appear on the output voltage of a DC-DC Buck converter. Typically, the output filter of the converter is designed in open-loop, considering the maximum allowable values for the output voltage and inductor current ripples. When closing the loop, the converter may exhibit unwanted periodic oscillations in steady state caused by the nonlinearities...
Home automation has become a subject of increasing interest for both industry and research as there is an increase in the awareness of such systems and their benefits can be easily seen. The new trend is to develop smart homes where commands can be given by speech. This way of communication, besides being the most natural, has the advantage of offering flexibility to the users especially when they...
This work presents a discussion on load steps modeling for the analysis of the dynamic behavior of a DC-DC Buck converter. The transient responses for two different ways of applying load steps, one using a load current source and the other one using a variable load resistance, are compared. The main focus is on the overshoot/undershoot in the behavior of the output voltage for the above mentioned...
The pronunciation model, a mapping between the lexicon words and their phonetic representation, has a key role in automatic speech recognition. Although many times neglected, the accuracy of this model influences significantly the accuracy of the whole system. This study discusses within-word and cross-word pronunciation variations for Romanian numbers and proposes the solutions to model them in the...
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.