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 the design, accurate analysis and experimental validation of a large antenna array working in Ka-band. This passive array of 1024 radiating elements is designed to radiate linear polarization in the Rx sub-band of the Ka-band (19.7–20.2 GHz). The main challenge of this work is to obtain an accurate modelling of such a large array. Indeed, since the electrical length of the array...
Future communication links will require higher data rates, multiple beams, and higher transmit/receive gains, in addition to smaller weight, cost, and power. With the growing interest for reduced size platforms and the requirement for ultra-wideband (UWB) performance to address multifunctionality, there is a strong need for UWB apertures to enable increased spectral efficiency, multifunctionality...
Some sleep disorders, such as sleep apnea, restless legs syndromes (RLS), and periodic limb movement disorder (PLMD), require a full-night sleep monitoring for diagnosis. Conventional sleep monitoring devices are disturbing and inconvenient for daily scene applications. In this poster paper, we propose a sleep monitoring system by embedding RFID tags into bed cloth and realize two main functions:...
Prefix Scan (or simply scan) is an operator that computes all the partial sums of a vector. A scan operation results in a vector where each element is the sum of the preceding elements in the original vector up to the corresponding position. Scan is a key operation in many relevant problems like sorting, lexical analysis, string comparison, image filtering among others. Although there are libraries...
Tracing current vs. voltage curve is an important part of the documentation of a Photovoltaic (PV) system to comply to the IEC 62446 standard. In order to get the high accuracy, the PV array would be subjected to an unspecified and large number of voltage perturbations often using specialized measuring instruments. In this paper, we explain how to minimize the tracing-time by performing a pre-defined...
In this research, we have developed a web based TaqMan Array Cards (TMDK) Data Management System that responds to the needs of collecting, sharing and uploading data of many surveillance projects, and a Ct-value prediction algorithm to determine target gene existence in sample. Any epidemic case can rapidly be detected and comparative evaluations can be done for the results of different sites while...
The increase in the size of the data used in natural language processing activities brings with it time and space constraints. Thus, it is important to both store and access data efficiently. This study includes experiments for storing the term-document index, which will be used in a natural language processing project, effectively in memory. For this purpose, the indexed data is compressed using...
This paper proposes an effective sequential initialization for multichannel nonnegative matrix factorization to address the difficulty of initial value dependency of the conventional method. The proposed method sets initial values of parameters from those obtained for the smaller number of channels. The experimental results of music separation show that the proposed method outperforms the conventional...
The objective of this paper is to describe a least square method to compute the far field from a nonuniformly spaced antenna array. This is because the far field pattern of an antenna array is the Fourier transform of the current distribution developed on the antenna structure, This is equivalent to computing the spectrum from a nonuniformly spaced data set using a least squares method. The merit...
A highly land-area-efficient solar array structure named “F Solar Package Type-M” was developed and evaluated based on the actual data in “F Nagara Solar Power Plant”. This package shows better power generation performance and return on investment than a conventional system configuration. A PV power plant using this package becomes more cost-effective and is expected to spread widely because the price...
Advancements in both computer science and biotechnology opened way for an unprecedented amount and variety of gene expression raw data to appear in the open access. It is sometimes worth to rearrange and unite data from several similar gene expression studies into new case-control groups to test new hypothesis using available data. Unfortunately, most popular gene expression databases, such as GEO...
As the complexity of the ocean environment, shape of towed array changes with time and space, so the accurate measurement shape of towed array is the key to improve the performance of signal processing. To solve this problem this paper proposes an estimation method based on genetic algorithm, firstly, established the objective function according to a known distance and azimuth of the target by beam...
Explosive charges are widely used in underwater acoustics experiments because it has wide bandwidth and high source level. the received signals are the shock wave and followed by a series of bubble pulses, which seriously affect the observation and applications of the signal. But for the shallow water waveguides, the bubble pulses could be seen as anther “signal”. In this paper, we treat the first...
SAR Tomography (TomoSAR) regards multi-baseline observation data as array observation data and realizes three-dimensional imaging by applying direction of arrival (DOA) estimation processing. To improve angular resolution of the TomoSAR with suppressing ambiguity, many repeat-pass data are required. However, it is often difficult to increase the number of data because of the cost. In this paper, we...
In this paper, we consider the direction-of-arrivals (DOAs) estimation of coherent narrowband signals impinging on an arbitrary linear array in a computational efficient way. A new interpolation transform based modified Capon beam-forming method is proposed without eigendecomposition, where the arbitrary linear array is transformed to a virtual uniform linear array (ULA) by utilizing the interpolation...
This paper proposes an adaptive multiclass neurofuzzy classifier (MC-NFC) for fault detection and classification in solar photovoltaic (PV) systems. The designed fuzzy classifier was optimized by seeking for the best numerical values of the parameters that tune its membership functions. The experiments have been conducted on the basis of collected data from a real time PV array emulator (namely array...
Large-scale systems with arrays of solid state disks (SSDs) have become increasingly common in many computing segments. To make such systems resilient, we can adopt erasure coding such as Reed-Solomon (RS) code as an alternative to replication because erasure coding can offer a significantly lower storage cost than replication. To understand the impact of using erasure coding on system performance...
In this paper, we propose two different hardware structure of SHA-3 hash algorithm for different width of circuit interface. They both support the four functions SHA3-224/256/384/512 of SHA-3 algorithm. The padding unit of our design is also implemented by hardware instead of software. Besides, a 3-round-in-1 structure is proposed to speed up the throughput of our circuit. We conduct an implementation...
Next generation non-volatile memory technologies draw attention recently as promising candidates for replacing conventional DRAM-based memory devices. By using the favorable features such as low energy consumption, non-volatility, and good scalability, the next generation non-volatile memory devices can replace conventional main memory and secondary storage layers. This paper proposes a hot-cold data...
This paper considers a method for detecting faulty elements in a linear phased array by means of set near-field probes. Using the asymptotic correspondence for two- and three-dimensional problems of the antenna theory leads to simpler mathematical models for the vertical dipoles array. A numerical study of mathematical models is based on the iterative regularization of the ill-posed problem of reconstructing...
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.