نتایج جستجو برای: temporal frequency
تعداد نتایج: 709664 فیلتر نتایج به سال:
Recent advances in realizing optical frequency combs using nonlinear parametric processes integrated photonic resonators have revolutionized on-chip clocks, spectroscopy, and multi-channel communications. At the same time, introduction of topological physics systems has provided a new paradigm to engineer flow photons, thereby, design devices with novel functionalities inherent robustness again...
Metasurfaces are ultrathin structures which constituted by an array of subwavelength scatterers with designable scattering responses. They have opened up unprecedented exciting opportunities for extraordinary wave engineering processes. On the other hand, frequency converters drawn wide attention due to their vital applications in telecommunication systems, health care devices, radio astronomy,...
Addiction is a biological, psychological, and social disease. Several factors are involved in etiology, substance abuse, and addiction which interact with each other and lead to the beginning of drug use and then addiction. Heroin is an addictive drug that, by acting on the central nervous system, reduces the density of neurons in the brain and interferes with decision making. This paper examin...
In this paper we study the process of allele frequency change in finite populations with overlapping generations with the purpose of evaluating the possibility of estimating the effective size from observations of temporal frequency shifts of selectively neutral alleles. Focusing on allele frequency changes between successive cohorts (individuals born in particular years), we show that such cha...
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