Backscatter - Wikipedia
网页In physics, backscatter (or backscattering) is the reflection of waves, particles, or signals back to the direction from which they came. It is usually a diffuse reflection due to scattering, as opposed to specular reflection as from a mirror, although specular backscattering can occur at normal incidence with a surface.
8.1 Backscatter基本原理 - 物联网前沿实践 - 清华大学 - 王继良
网页当电磁波在传播中遇到具有不同阻抗的两种介质的边界时，电磁波将会被一定程度的吸收或反射回去。. 所以，只需要在天线处进行阻抗的切换，就可以实现信息的传输。. Backscatter技术可使射频设备的功耗若干个数量级，因此在物联网的各种应用中，Backscatter ...
后向散射 - 百度百科
网页衰减系数 （attenuation coefficient）描述介质（medium）的固有光学性质（IOP：inherent optical properties）。. 它的值是由介质内部各个组份的物理吸收特性、几何散射特性以及各个组份的浓度决定的，与外部光源（或电磁波源）本身的强度无关。. 辐照度 （irradiance）和辐 ...
What is the difference between scattering and backscattering?
网页2015年12月5日 · Backscattering is a type of scattering in which the momentum's direction of the scattered particle or photon changes in a way that the particle's direction gets reversed (head collision of a ball and wall) or the photon is reflected back towards its source (so you can see yourself in the mirror).
Backscattering - an overview | ScienceDirect Topics
网页Backscattering refers to the phenomenon of "structural noise" in ultrasonic inspection, where high-frequency waves are used to detect small reflection sources like precipitates and voids, with a signal level lower than that reflected from cracks.
Backscattering - an overview | ScienceDirect Topics
网页Backscattering refers to the phenomenon of reflected waves in the field of ultrasonic inspection, also known as "structural noise". It is used to detect the size and intensity of reflection sources such as precipitates and voids, which are smaller than cracks, by using a high-frequency ultrasonic transducer.
Backscattering - SpringerLink
网页2014年1月1日 · Backscattering (or backscatter) is the reflection of waves, particles, or signals back to the direction they came from. Backscattering is defined also as the phenomenon that occurs when radiation or particles are scattered at angles to the original direction of motion of greater than 90°.
Observation of strong backscattering in valley-Hall photonic ...
网页2023年4月10日 · Reciprocal topological photonic crystals allow backscattering. The unique properties of light underpin the visions of photonic quantum technologies, optical interconnects and a wide range of...
Backscattering of Beta Particles - PhysicsOpenLab
网页2017年2月27日 · Introduction. When a β-particle (energetic electron from nuclear decay) enters a material its path can be deflected when it interacts with the nuclei of the material. The β-particles are oppositely charged to the positively charged nucleus and thus an attractive force exists between the two.
A comprehensive open‐access database of electron backscattering ...
网页2023年7月20日 · Electron backscattering is of great interest in many applications, such as scanning electron microscopy (SEM) and image analysis, electron microlithography, Auger electron spectroscopy, and film thickness determination. This phenomenon is crucial in medical physics for radiation damage studies and accurately assessing the doses deposited around ...
跳至内容