Articles with "free space" as a keyword



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Enemy-free space is important in driving the host expansion of a generalist herbivore to an inferior exotic plant in a wetland of Yangtze Estuary

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Published in 2018 at "Biological Invasions"

DOI: 10.1007/s10530-018-1845-6

Abstract: Novel interactions between exotic plants and native herbivores can be driven by multiple ecological and evolutionary processes, but the underlying mechanisms have rarely been explored from a multitrophic perspective. In this study, we examined the… read more here.

Keywords: plant; important driving; host; yangtze estuary ... See more keywords
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Quantitative analysis of decoherence of entangled microwave signals in free space

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Published in 2019 at "Quantum Information Processing"

DOI: 10.1007/s11128-019-2321-7

Abstract: Entangled microwave signals are the new quantum information resource of microwave frequency. Based on the evolution model of two-mode squeezed vacuum state with Fokker–Planck equation, we consider the absorption of atmospheric gas and the attenuation… read more here.

Keywords: signals free; decoherence entangled; microwave signals; entangled microwave ... See more keywords
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Analyzing the Quality of Free Space Optical Signal in Fog: A Case Study of Pakistan

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Published in 2017 at "Wireless Personal Communications"

DOI: 10.1007/s11277-016-3910-8

Abstract: In this work, the performance of the free space optical (FSO) link is analyzed at different events of fog. We have considered the case study of Pakistan, which defines fog events at different visibilities among… read more here.

Keywords: pakistan; space optical; free space; study pakistan ... See more keywords
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Estimating the Performance of Free Space Optical Link Under Adverse Weather Conditions by Using Various Models

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Published in 2018 at "Wireless Personal Communications"

DOI: 10.1007/s11277-018-5870-7

Abstract: Free space optics (FSO), going to replace the present microwave communications in the future is gaining considerable attention as it supplies fruitful solutions to many complications like the last mile problem. Besides availing many advantages… read more here.

Keywords: space optical; space; optical link; performance ... See more keywords
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Reliability analysis of free space optical communication link considering the effects of laser diode chirping

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Published in 2019 at "Indian Journal of Physics"

DOI: 10.1007/s12648-019-01435-5

Abstract: In this article, wavelength chirping of a semiconductor laser due to changes in current and temperature has been measured. Based on the range of variation, a suitable combined filter consisting of a short-pass filter and… read more here.

Keywords: space optical; optical communication; link; free space ... See more keywords
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Kerr Effect Based Spectrum Sliced Wavelength Division Multiplexing For Free Space Optical Communication

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Published in 2018 at "Optik"

DOI: 10.1016/j.ijleo.2017.08.062

Abstract: Abstract The super-continuum spectrum sliced WDM FSO system is evaluated at 2.5 Gbps data rate up to link distance of 5 Km. A Highly Nonlinear Fiber (HNLF) is channel for the generation of high power broad spectrum… read more here.

Keywords: space optical; system; spectrum sliced; spectrum ... See more keywords
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FE2 simulations of magnetorheological elastomers: influence of microscopic boundary conditions, microstructures and free space on the macroscopic responses of MREs

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Published in 2020 at "International Journal of Solids and Structures"

DOI: 10.1016/j.ijsolstr.2020.02.015

Abstract: Abstract In the current work, the response of heterogeneous magnetorheological elastomers (MREs) which are loaded by external magnetic fields in the absence and also in the presence of free space is studied. A fully-coupled two-scale… read more here.

Keywords: macroscopic responses; boundary conditions; responses mres; magnetorheological elastomers ... See more keywords
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Analysis of inter-satellite free-space optical link performance considering different system parameters

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Published in 2019 at "Opto-Electronics Review"

DOI: 10.1016/j.opelre.2018.11.002

Abstract: Abstract The welcome and adaptation of optical wireless technology by the modern era has brought forward the concept of an inter-satellite free-space optical communication system. In the present work, I study the combined effect of… read more here.

Keywords: performance; satellite free; link; free space ... See more keywords
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Optical pulse monitoring unit for Free Space Optics

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Published in 2019 at "Opto-Electronics Review"

DOI: 10.1016/j.opelre.2019.09.001

Abstract: Abstract The paper presents a new construction of an optical pulse amplitude monitoring unit (PAMU) used in a transceiver of Free Space Optics. It consists of a buffer, constant fraction discriminator (CFD), delay line, and… read more here.

Keywords: optical pulse; unit; space optics; optics ... See more keywords
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BP artificial neural network based wave front correction for sensor-less free space optics communication

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Published in 2017 at "Optics Communications"

DOI: 10.1016/j.optcom.2016.10.037

Abstract: Abstract The sensor-less adaptive optics (AO) is one of the most promising methods to compensate strong wave front disturbance in free space optics communication (FSO). The back propagation (BP) artificial neural network is applied for… read more here.

Keywords: correction; sensor less; optics; wave front ... See more keywords
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A hybrid quantum eraser scheme for characterization of free-space and fiber communication channels

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Published in 2018 at "Optics Communications"

DOI: 10.1016/j.optcom.2017.06.084

Abstract: Abstract We demonstrate a simple projective measurement based on the quantum eraser concept that can be used to characterize the disturbances of any communication channel. Quantum erasers are commonly implemented as spatially separated path interferometric… read more here.

Keywords: communication; fiber; quantum eraser; space fiber ... See more keywords