Results 21 to 30 of about 270,830 (185)

Detecting novel genes with sparse arrays [PDF]

Gene, 2010
Species-specific genes play an important role in defining the phenotype of an organism. However, current gene prediction methods can only efficiently find genes that share features such as sequence similarity or general sequence characteristics with previously known genes.
Haiminen, Niina, Smit, Bart, Rautio, Jari, Vitikainen, Marika, Wiebe, Marilyn, Martinez, Diego, Chee, Christine, Kunkel, Joe, Sanchez, Charles, Nelson, Mary Anne, Pakula, Tiina, Saloheimo, Markku, Penttilä, Merja, Kivioja, Teemu, Arvas, Mikko   +15 more
openaire   +2 more sources

LOFAR Sparse Image Reconstruction [PDF]

, 2015
Context. The LOw Frequency ARray (LOFAR) radio telescope is a giant digital phased array interferometer with multiple antennas distributed in Europe. It provides discrete sets of Fourier components of the sky brightness.
Anderson, J., Avruch, I., Beck, R., Bentum, M., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H., Ciardi, B., Corbel, S., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., el, J., Engels, D., ey, V., ey-Pommier, M., Falcke, H., Fallows, R., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., Garsden, H., Girard, J., Grießmeier, J., Gunst, A., Hassall, T., Heald, G., Hoeft, M., Hö,, Juette, E., Karastergiou, A., Kondratiev, V., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J., Mulcahy, D., Munk, H., Norden, M., Orru, E., Paas, H., Pietka, G., Pizzo, R., Polatidis, A., Renting, A., Rowlinson, A., Röttgering, H., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Starck, J., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Tasse, C., Thoudam, S., Toribio, C., van Amesfoort, A., van der Horst, A., van Weeren, R., Vermeulen, R., Vocks, C., Wijnholds, S., Wise, M., Woiselle, A., Wucknitz, O., Yatawatta, S., Zarka, P., Zensus, A.   +81 more
core   +4 more sources

Current Status and New Challenges of The Tunka Radio Extension [PDF]

, 2019
The Tunka Radio Extension (Tunka-Rex) is an antenna array spread over an area of about 1~km$^2$. The array is placed at the Tunka Advanced Instrument for cosmic rays and Gamma Astronomy (TAIGA) and detects the radio emission of air showers in the band of
Bezyazeekov, P. A., Budnev, N. M., Chernykh, D., Fedorov, O., Gress, O. A., Haungs, A., Hiller, R., Huege, T., Kazarina, Y., Kleifges, M., Korosteleva, E. E., Kostunin, D., Kuzmichev, L. A., Lenok, V., Lubsandorzhiev, N., Marshalkina, T., Monkhoev, R., Osipova, E., Pakhorukov, A., Pankov, L., Prosin, V. V., Schröder, F. G., Shipilov, D., Tunka-REX Collaboration, Zagorodnikov, A.   +24 more
core   +3 more sources

Optimization of Sparse Cross Array Synthesis via Perturbed Convex Optimization

Sensors, 2020
Three-dimensional (3-D) imaging sonar systems require large planar arrays, which incur hardware costs. In contrast, a cross array consisting of two perpendicular linear arrays can also support 3-D imaging while dramatically reducing the number of sensors.
Boxuan Gu, Yaowu Chen, Rongxin Jiang, Xuesong Liu   +3 more
doaj   +1 more source

Partial Angular Sparse Representation Based DOA Estimation Using Sparse Separate Nested Acoustic Vector Sensor Array

Sensors, 2018
In this paper, the issue of direction of arrival (DOA) estimation is discussed, and a partial angular sparse representation (SR)-based method using a sparse separate nested acoustic vector sensor (SSN-AVS) array is developed.
Jianfeng Li, Zheng Li, Xiaofei Zhang
doaj   +1 more source

Thinned coprime arrays for DOA estimation [PDF]

, 2017
Sparse arrays can generate a larger aperture than traditional uniform linear arrays (ULA) and offer enhanced degrees-of-freedom (DOFs) which can be exploited in both beamforming and direction-of-arrival (DOA) estimation. One class of sparse arrays is the
grant, piya, piya, shen, vaidyanathan, van trees   +5 more
core   +2 more sources

A Hybrid Technique Using Combinatorial Cyclic Difference Sets and Binomial Amplitude Tapering for Linear Sparse Array Antenna Design

Advanced Electromagnetics, 2016
Reducing system complexity and cost in synthesizing a sparse array antenna design is a challenging task for practical communication systems, such as radar systems and space communication.
E. Sandi, F. Y. Zulkifli, E. T. Rahardjo
doaj   +1 more source

Fast direction of arrival estimation method for ultra‐high voltage converter valve insulation board partial discharge based on a sparse array

IET Science, Measurement & Technology, 2022
An insulation board is an important insulator used between damping capacitors in a converter valve. The potential creeping discharge phenomenon on the insulation board will affect the insulation between the damping capacitors and even the safe operation ...
Yunpeng Liu, Jiashuo Liu, Tingyu Lai, Xiaoguang Wei, Shaotong Pei   +4 more
doaj   +1 more source

Nonparametric empirical Bayes and compound decision approaches to estimation of a high-dimensional vector of normal means [PDF]

, 2009
We consider the classical problem of estimating a vector $\bolds{\mu}=(\mu_1,...,\mu_n)$ based on independent observations $Y_i\sim N(\mu_i,1)$, $i=1,...,n$. Suppose $\mu_i$, $i=1,...,n$ are independent realizations from a completely unknown $G$.
Brown, Lawrence D., Greenshtein, Eitan
core   +3 more sources

Multi-Coset Sparse Imaging Arrays [PDF]

, 2013
We develop an efficient structured sparse antenna array architecture for coherent imaging of sparse but otherwise unknown scenes. In this architecture, the array elements are configured in a periodic nonuniform pattern that can be viewed as the ...
Kochman, Yuval, Krieger, James D., Wornell, Gregory W.   +2 more
core   +1 more source