Results 31 to 40 of about 660,831 (348)

Design of an S/X-Band Single-Layer Shared-Aperture Array Antenna Using a Mutual Complementary Configuration

Applied Sciences, 2023
This paper proposes an S/X-band single-layer shared-aperture array antenna for the multifunction radars of military ships. A unit cell of the proposed antenna consists of one S-band element and four X-band elements. The S- and X-band elements are printed
En-Yeal Yim, Doyoung Jang, Chang-Hyun Lee, Hosung Choo   +3 more
doaj   +1 more source

Heterodyne holographic microscopy of gold particles [PDF]

, 2008
We report experimental results on heterodyne holographic microscopy of subwavelength-sized gold particles. The apparatus uses continuous green laser illumination of the metal beads in a total internal reflection configuration for dark-field operation ...
Absil, Emilie, Atlan, Michael, Coppey-Moisan, Maité, Desbiolles, Pierre, Gross, Michel, Tessier, Gilles   +5 more
core   +3 more sources

L-Shape Propagated Array Configuration With Dynamic Reconfiguration Algorithm for Enhancing Energy Conversion Rate of Partial Shaded Photovoltaic Systems

IEEE Access, 2021
Partial shading is an unavoidable factor that reduces the performance of solar PV systems. The PV system receives uneven irradiation due to partial shading which causes the mismatch loss.
A. Srinivasan, S. Devakirubakaran, B. Meenakshi Sundaram, Praveen Kumar Balachandran, Santhan Kumar Cherukuri, D. Prince Winston, Thanikanti Sudhakar Babu, Hassan Haes Alhelou   +7 more
doaj   +1 more source

Mitigation of Mismatch Power Losses of PV Array under Partial Shading Condition using novel Odd Even Configuration

Energy Reports, 2020
In this paper, the effect of Partial Shading Condition (PSC) on various solar photovoltaic (PV) array topologies has been studied extensively. PSC reduces the maximum power of a PV array and produces multiple Maximum Power Points (MPPs) in the PV ...
Karan Yadav, Bhavnesh Kumar, Swaroop D.
doaj   +1 more source

Status and Challenges of Marine Current Turbines: A Global Review

Journal of Marine Science and Engineering
Over the past few decades, marine current energy utilization has transitioned from conceptual demonstrations to industrial-scale prototypes. This progression now approaches a crucial phase emphasizing the need for industrialization and commercialization.
Yajing Gu, Tian Zou, Hongwei Liu, Yonggang Lin, He Ren, Qingjun Li   +5 more
doaj   +1 more source

Simulation of the influence of hydrophones used for the characterization of pressure field distribution in low frequency, high power ultrasonic reactor vessels [PDF]

, 2007
This paper describes the use of a finite element (FE) modeling approach to investigate the influence of different hydrophone designs in laboratory scale reactor vessels.
Gachagan, A., Harvey, G., O'Leary, R.L.
core   +1 more source

A Procedure for Modeling Photovoltaic Arrays under Any Configuration and Shading Conditions

Energies, 2018
Photovoltaic (PV) arrays can be connected following regular or irregular connection patterns to form regular configurations (e.g., series-parallel, total cross-tied, bridge-linked, etc.) or irregular configurations, respectively.
Daniel Gonzalez Montoya, Juan David Bastidas-Rodriguez, Luz Adriana Trejos-Grisales, Carlos Andres Ramos-Paja, Giovanni Petrone, Giovanni Spagnuolo   +5 more
doaj   +1 more source

An Experimental Investigation on Photovoltaic Array Power Output Affected by the Different Partial Shading Conditions

Energies, 2021
This paper presents an experimental investigation on photovoltaic array (PV array) power output affected by partial shading conditions (PSCs). An experiment setup of a PV array with a series configuration using 2 × 4 photovoltaic modules (PV modules) was
Ghoname Abdullah, Hidekazu Nishimura, Toshio Fujita   +2 more
doaj   +1 more source

Sparse Active Rectangular Array with Few Closely Spaced Elements

, 2018
Sparse sensor arrays offer a cost effective alternative to uniform arrays. By utilizing the co-array, a sparse array can match the performance of a filled array, despite having significantly fewer sensors.
Koivunen, Visa, Rajamäki, Robin
core   +1 more source

Data Combinations Accounting for LISA Spacecraft Motion [PDF]

, 2003
LISA is an array of three spacecraft in an approximately equilateral triangle configuration which will be used as a low-frequency gravitational wave detector. We present here new generalizations of the Michelson- and Sagnac-type time-delay interferometry
Daniel A. Shaddock, F.B. Estabrook, Frank B. Estabrook, J. W. Armstrong, J.W. Armstrong, M. Tinto, M. Tinto, M. Tinto, M. Tinto, Massimo Tinto, S.V. Dhurandhar, W.M. Folkner   +11 more
core   +1 more source