Results 31 to 40 of about 1,623,042 (284)

OII: An Orientation Information Integrating Network for Oriented Object Detection in Remote Sensing Images

open access: yesRemote Sensing
Oriented object detection for remote sensing images poses formidable challenges due to arbitrary orientation, diverse scales, and densely distributed targets (e.g., across terrain). Current investigations in remote sensing object detection have primarily
Yangfeixiao Liu, Wanshou Jiang
doaj   +1 more source

Local Modal Frequency Improvement with Optimal Stiffener by Constraints Transformation Method

open access: yesApplied Sciences, 2021
Local modal vibration could adversely affect the dynamical environment, which should be considered in the structural design. For the mode switching phenomena, the traditional structural optimization method for problems with specific order of modal ...
Shenyan Chen   +4 more
doaj   +1 more source

Quantum state transformation by dispersive and absorbing four-port devices

open access: yes, 1998
The recently derived input-output relations for the radiation field at a dispersive and absorbing four-port device [T. Gruner and D.-G. Welsch, Phys. Rev.
A. Luis   +23 more
core   +1 more source

Transformation of Frequency Distributions [PDF]

open access: yesNature, 1948
FREQUENCY distributions of numbers of eggs, insects, spores, or other biological entities are descriptive of discrete variation, and can never be represented exactly by a normal distribution or by any other distribution of a continuous variate. Nevertheless, when the number of observations and the range of variation is large, such distributions may ...
openaire   +2 more sources

DUAL BAND FILTER DESIGN USING REAL FREQUENCY TECHNIQUE AND FREQUENCY TRANSFORMATION

open access: yesElectrica, 2017
In this work, we present a frequency transformation based dual-band filter design approach using scatteringbased real frequency technique. In the design process, conventional low-pass to band-pass frequency transformation isintegrated with the simplified
Serkan YILDIZ   +2 more
doaj   +2 more sources

Radio Photonic Systems for Measurement of Instantaneous Radio Frequency with Amplitude-phase Modulation of Optical Carrier

open access: yesJournal of Telecommunications and Information Technology, 2016
In this article questions related to the development instantaneous radio frequency measurement system based on application in them original ways of the amplitude-phase modulation transformation of single-frequency optical carrier by a radio signal in ...
Oleg Gennadyevich Morozov   +1 more
doaj   +1 more source

Optimized rice transformation protocol for transformation of the blast susceptible Indica rice accession CO39

open access: yesCABI Agriculture and Bioscience, 2022
Background Many rice transformation protocols have been reported, but optimization is still required to ensure efficient transformation of specific rice accessions.
Julian R. Greenwood, Anna N. Glaus
doaj   +1 more source

Momentum of the Electromagnetic Field in Transparent Dielectric Media

open access: yes, 2012
We present arguments in favor of the proposition that the momentum of light inside a transparent dielectric medium is the arithmetic average of the Minkowski and Abraham momenta.
Mansuripur, Masud
core   +1 more source

Collective motions of a quantum gas confined in a harmonic trap [PDF]

open access: yes, 2005
Single-component quantum gas confined in a harmonic potential, but otherwise isolated, is considered. From the invariance of the system of the gas under a displacement-type transformation, it is shown that the center of mass oscillates along a classical ...
Dae-Yup Song, J. R. Klauder
core   +1 more source

Time-Frequency Transfer with Quantum Fields

open access: yes, 1996
Clock synchronisation relies on time-frequency transfer procedures which involve quantum fields. We use the conformal symmetry of such fields to define as quantum operators the time and frequency exchanged in transfer procedures and to describe their ...
A. Einstein   +21 more
core   +1 more source

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