搜索结果: 1-15 共查到“物理学 Microwave”相关记录37条 . 查询时间(0.119 秒)
THEORETICAL MODELLING STUDY ON THE RELATIONSHIP BETWEEN MULTI-FREQUENCY MICROWAVE VEGETATION INDEX AND VEGETATION PROPERTIES (OPTICAL DEPTH AND SINGLE SCATTERING ALBEDO)
Microwave Vegetation Index Matrix Doubling Model Optical Depth Single Scattering Albedo Soil Moisture Roughness
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2018/5/15
This paper presents a theoretical study of derivation Microwave Vegetation Indices (MVIs) in different pairs of frequencies using two methods. In the first method calculating MVI in different frequenc...
VALIDATION OF THE DAILY PASSIVE MICROWAVE SNOW DEPTH PRODUCTS OVER NORTHERN CHINA
Snow Depth Products Snow Cover Passive Microwave Validation Northern China
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2018/5/15
Passive microwave sensors have the capability to provide information on snow depth (SD), which is critically important for hydrological modeling and water resource management. However, the different a...
A MODIFIED TWO-SCALE MICROWAVE SCATTERING MODEL FOR A GAUSSIAN-DISTRIBUTED CONDUCTING ROUGH SURFACE
Two-scale Model Rough Surface Backscattering Model Wavelet Packet Transform AIEM
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2018/5/16
A modified two-scale microwave scattering model (MTSM) was presented to describe the scattering coefficient of natural rough surface in this paper. In the model, the surface roughness was assumed to b...
2017微波光子学研讨会(Workshop on Microwave Photonics: An Enabling Technology for 5G)
2017 微波光子学 研讨会
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2017/9/22
5G technology will be especially demanding in several end-user requirements, such as latency, massive machine-to-machine communication, spectral efficiency, energy consumption, and data rates. In orde...
2017光学和微波技术研讨会(Symposium D-Optical and Microwave Technologies)
2017 光学和微波技术 研讨会
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2017/3/9
Optical and Microwave Technologies offer a wide range of significant technical and operational advantages in the communication ecosystem meeting complementary needs.Breakthroughs in Optical Technologi...
The 2017 International Topical Meeting on Microwave Photonics(MWP 2017)
The 2017 International Topical Meeting Microwave Photonics
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2017/2/15
Microwave Photonics (MWP) is an inter-disciplinary field of study that concerns the interactions between microwave and optical waves for the generation, processing, control and distribution of microwa...
Simulation of the microwave emission of multi-layered snowpacks using the Dense Media Radiative transfer theory: the DMRT-ML model
microwave emission multi-layered snowpacks
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2014/12/12
DMRT-ML is a physically based numerical model
designed to compute the thermal microwave emission of
a given snowpack
Sub-femtosecond absolute timing precision with a 10 GHz hybrid photonic-microwave oscillator
Sub-femtosecond absolute timing precision optics
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2012/5/29
We present an optical-electronic approach to generating microwave signals with high spectral purity. By circumventing shot noise and operating near fundamental thermal limits, we demonstrate 10 GHz si...
Negative Group Velocity and Spin-Flip in Microwave Adaptors
Negative Group Velocity and Spin-Flip Microwave Adaptors Optics
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2012/5/28
A Fabry-Perot like interferometer with two microwaveguide adaptors as reflectors creates a passive dielectric medium with a negative group delay time due to polarization shift. A rotational strain of ...
Topological-phase effects and path-dependent interference in microwave structures with magnetic-dipolar-mode ferrite particles
Topological-phase effects path-dependent interference microwave structures magnetic-dipolar-mode ferrite particles
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2012/4/19
Different ways exist in optics to realize photons carrying nonzero orbital angular momentum. Such photons with rotating wave fronts are called twisted photons. In microwaves, twisted fields can be pro...
A Novel Direct Detection Microwave Photonic Vector Modulation Scheme for Radio-Over-Fiber System
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2011/11/22
This letter demonstrates the feasibility of a novel direct detection microwave photonic vector modulation scheme for the radio-over-fiber (RoF) system. Unlike the traditional double-sideband with opti...
PT symmetry and spontaneous symmetry breaking in a microwave billiard
PT symmetry spontaneous symmetry microwave billiard Quantum Physics
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2011/10/9
Abstract: We demonstrate the presence of parity-time (PT) symmetry for the non-Hermitian two-state Hamiltonian of a dissipative microwave billiard in the vicinity of an exceptional point (EP). The sha...
Improved accuracy of the NPL-CsF2 primary frequency standard: evaluation of distributed cavity phase and microwave lensing frequency shifts
NPL-CsF2 primary frequency standard cavity phase microwave lensing frequency shifts
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2011/8/17
Abstract: We evaluate the distributed cavity phase and microwave lensing frequency shifts, which were the two largest sources of uncertainty for the NPL-CsF2 cesium fountain clock. We report measureme...
Observing the Big Bounce with Tensor Modes in the Cosmic Microwave Background: Phenomenology and Fundamental LQC Parameters
Tensor Modes the Cosmic Microwave Background
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2010/12/24
Cosmological models where the standard big bang is replaced by a bounce have been studied for decades. The situation has, however, dramatically changed in the past years for two reasons: first, becaus...
Level Crossing Analysis of Cosmic Microwave Background Radiation: A method for detecting cosmic strings
Cosmic Microwave Background Radiation detecting cosmic strings
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2010/12/27
In this paper we study the footprint of cosmic string as the topological defects in the very early universe on the cosmic microwave background radiation. We develop the method of level crossing analy...