搜索结果: 1-15 共查到“理学 lens”相关记录47条 . 查询时间(0.015 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Symplectic fillings of lens spaces and Seifert fibered spaces
透镜空间 塞弗特纤维空间 辛填充
2023/4/27
In this talk, we apply Menke's JSJ decomposition for symplectic fillings to several families of contact 3-manifolds. Among other results, we complete the classification up to orientation-preserving di...
Cosmic Magnifying Lens Reveals Inner Jets of Black Holes（图）
Cosmic Magnifying Lens Inner Jets Black Holes
2017/9/5
"We have known about the existence of these clumps of material streaming along black hole jets, and that they move close to the speed of light, but not much is known about their internal structure or ...
Predicting Climate Impacts on Ecosystems Will Require Scientists to Widen the Lens
Predicting Climate Ecosystems Scientists Widen the Lens
2016/11/4
Most research on climate change ecology is limited to the impacts of a single climate variable, such as temperature or water availability, on one trophic level at a time — and often on a single specie...
Many things in the natural world are geometrically chiral, meaning they cannot be superimposed onto their mirror image. Think hands — right and left hands are mirror images but if you transplanted a r...
Distant supernova split four ways by gravitational lens（图）
Distant supernova split gravitational lens
2015/3/18
Over the past several decades, astronomers have come to realize that the sky is filled with magnifying glasses that allow the study of very distant and faint objects barely visible with even the large...
Negative refractive perfect lens vs Spherical geodesic lens. Perfect Imaging comparative analysis
Negative refractive perfect lens Spherical geodesic lens Imaging comparative analysis Optics
2012/4/24
Negative Refractive Lens (NRL) has shown that an optical system can produce images with details below the classic Abbe diffraction limit. This optical system transmits the electric field, emitted by t...
The lens effect of cosmic entire hyperspherical space
bolometric flux hypersphere cosmology large scale structure of universe quasars supernova gamma ray burst redshift periodicity
2011/9/25
There is a sort of new lens effect in hyperspherical universe, and it should result in some periodicity in observation. In addition, the cause of supernova and gamma ray burst may be given; the super ...
A Study of Gravitational Lens Chromaticity with the Hubble Space Telescope
A Study of Gravitational Lens Chromaticity with the Hubble Space Telescope
2011/10/20
We report Hubble Space Telescope observations of 6 gravitational lenses with the Advanced Camera for Surveys. We measured the flux ratios between the lensed images in 6 filters from 8140\AA\ to 2200\A...
Photon noise limited radiation detection with lens-antenna coupled Microwave Kinetic Inductance Detectors
Photon noise limited radiation Microwave Kinetic Inductance Detectors
2011/10/13
Microwave Kinetic Inductance Detectors (MKIDs) have shown great potential for sub-mm instrumentation because of the high scalability of the technology. Here we demonstrate for the first time in the su...
Photometric redshift requirements for lens galaxies in galaxy-galaxy lensing analyses
requirements lens galaxies'galaxy-galaxy lensing analyses
2011/9/29
Weak gravitational lensing is a valuable probe of galaxy formation and cosmology. Here we quantify the effects of using photometric redshifts (photo-z) in galaxy-galaxy lensing, for both sources and l...
Performance of a 20-in. photoelectric lens image intensifier tube
First generation image intensifier tube Large sensitive area Photodetector High energy astrophysics Ashra Experiment
2011/9/13
We have evaluated a 20-in. photoelectric lens image intensifier tube (PLI) to be mounted on the spherical focal surface of the Ashra light collectors,where Ashra stands for All-sky Survey High Resolut...
In this note, we first classify all topological torus knots lying on the Heegaard torus in Lens spaces, and then we classify Legendrian representatives of torus knots. We show that all Legendrian toru...
A Compact Early-type Galaxy at z = 0.6 Under a Magnifying Lens: Evidence For Inside-out Growth
galaxies elliptical and lenticular cD
2010/11/10
We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM 200 pc) to investigate the sub-kpc scale of ...
Ultra-bright and efficient single photon generation based on N-V centres in nanodiamonds on a solid immersion lens
photon generation N-V centres nanodiamonds
2010/11/16
Single photons are fundamental elements for quantum information technologies such as quantum cryptography, quantum information storage and optical quantum computing. Colour centres in diamond have pr...
Curved plasma channels: Kerr lens and Airy prism
Curved plasma channels Kerr lens Airy prism
2010/11/16
We analytically calculate the transverse energy fluxes that would be respectively induced in high-power Airy beams by the Kerr self-focusing and the Airy profile itself if they were the only active p...